MULTI-TRP TRANSMISSION FOR DOWNLINK SEMI-PERSISTENT SCHEDULING
20220322362 · 2022-10-06
Inventors
- Siva Muruganathan (Stittsville, CA)
- Shiwei Gao (Nepean, CA)
- Yufei Blankenship (Kildeer, IL)
- Mattias Frenne (Uppsala, SE)
Cpc classification
H04L5/0007
ELECTRICITY
H04W72/23
ELECTRICITY
H04L5/0053
ELECTRICITY
H04W72/0453
ELECTRICITY
H04L5/0035
ELECTRICITY
International classification
Abstract
Systems and methods for multi-Transmission Reception Point (TRP) transmission for downlink Semi-Persistent Scheduling (SPS) are provided. In some embodiments, a method performed by a wireless device for configuring one or more wireless communications settings includes determining multiple wireless communications configurations; and simultaneously activating at least two of the wireless communications configurations such that the at least two of the plurality of wireless communications configurations include configuration of one or more of a low latency and/or reliability scheme and one or more properties related to the low latency and/or reliability scheme. This enables multi-TRP based reliability schemes for the case when multiple downlink SPS configurations can be simultaneously activated. By independently configuring low latency and/or reliability schemes and properties of such schemes to different downlink SPS configurations, different reliability and/or low latency schemes can be flexibly applied to different downlink SPS configurations that may be associated with different traffic profiles.
Claims
1. A method performed by a wireless device for configuring one or more wireless communications settings, the method comprising: determining a plurality of wireless communications configurations; and simultaneously activating at least two of the plurality of wireless communications configurations such that the at least two of the plurality of wireless communications configurations include configuration of one or more of a low latency and/or reliability scheme and one or more properties related to the low latency and/or reliability scheme.
2. The method of claim 1 wherein simultaneously activating the at least two of the plurality of wireless communications configurations is performed only when the wireless device is simultaneously communicating with multiple transmission points.
3. The method of claim 1 wherein the wireless device applies one or more of the low latency and/or reliability schemes by receiving multiple Transmission Configuration Indication, TCI, states.
4. The method of claim 3 wherein receiving the multiple TCI states corresponds to reception of downlink Semi-Persistent Scheduling, SPS, with the applied low latency and/or reliability scheme.
5. The method of claim 1 wherein the at least two of the plurality of wireless communications configurations in response to an activating Downlink Control Information, DCI, message.
6. The method of claim 1 wherein the plurality of wireless communications configurations are SPS configurations.
7. The method of claim 1 wherein determining the plurality of wireless communications configurations comprises communicating with a network node to determine the plurality of wireless communications configurations.
8. The method of claim 7 wherein determining the plurality of wireless communications configurations is done via Radio Resource Control, RRC.
9. The method of claim 1 wherein the low latency scheme and the reliability scheme include one or more of the group consisting of: spatial multiplexing, frequency multiplexing, slot-based time multiplexing, and mini-slot based time multiplexing.
10. The method of claim 1 wherein the one or more properties related to the low latency scheme and the one or more properties related to the reliability scheme include one or more of the group consisting of: a repetition factor for slot based time repetition, a frequency domain resource allocation information for frequency repetition, a time domain resource allocation information for time repetition, and a configuration of additional TCI states in addition to what is indicated in the activating DCI.
11. The method of claim 1 wherein the at least two of the plurality of wireless communications configurations are chosen based on a control message from the network node.
12. (canceled)
13. The method of claim 1 wherein the one or more of the low latency and/or reliability schemes are chosen based on a TCI field in a DCI message.
14. The method of claim 1 wherein the configuration of one or more of a low latency and/or reliability schemes is independent for each of the plurality of wireless communications configurations.
15. The method of claim 1 wherein a fixed redundancy version sequence is applied when receiving SPS with one of the low latency and/or reliability schemes.
16. A method performed by a base station for configuring one or more wireless communications settings, the method comprising: communicating with a wireless device such that a plurality of wireless communications configurations is configured for the wireless device; and communicating with the wireless device such that at least two of the plurality of wireless communications configurations are simultaneously activated and the at least two of the plurality of wireless communications configurations include configuration of one or more of: a low latency and/or reliability scheme and one or more properties related to: the low latency and/or reliability scheme.
17. The method of claim 16 wherein communicating with the wireless device such that the at least two of the plurality of wireless communications configurations are simultaneously activated is performed only when the wireless device is simultaneously communicating with at least two transmission points.
18. (canceled)
19. The method of claim 16 wherein the wireless communications configurations are Semi-Persistent Scheduling, SPS, configurations.
20. (canceled)
21. The method of claim 16 wherein the low latency scheme and the reliability scheme include one or more of the group consisting of: spatial multiplexing, frequency multiplexing, slot-based time multiplexing, and mini-slot based time multiplexing.
22. The method of claim 16 wherein the one or more properties related to the low latency scheme and the one or more properties related to the reliability scheme include one or more of the group consisting of: a repetition factor for slot based time repetition, a frequency domain resource allocation information for frequency repetition, a time domain resource allocation information for time repetition, and a configuration of additional Transmission Configuration Indicator, TCI, states in addition to what is indicated in the activating DCI.
23-28. (canceled)
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0072] The accompanying drawing figures incorporated in and forming a part of this specification illustrate several aspects of the disclosure, and together with the description serve to explain the principles of the disclosure.
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DETAILED DESCRIPTION
[0094] The embodiments set forth below represent information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure.
[0095] Radio Node: As used herein, a “radio node” is either a radio access node or a wireless device.
[0096] Radio Access Node: As used herein, a “radio access node” or “radio network node” is any node in a radio access network of a cellular communications network that operates to wirelessly transmit and/or receive signals. Some examples of a radio access node include, but are not limited to, a base station (e.g., a New Radio (NR) base station (gNB) in a Third Generation Partnership Project (3GPP) Fifth Generation (5G) NR network or an enhanced or evolved Node B (eNB) in a 3GPP Long Term Evolution (LTE) network), a high-power or macro base station, a low-power base station (e.g., a micro base station, a pico base station, a home eNB, or the like), and a relay node.
[0097] Core Network Node: As used herein, a “core network node” is any type of node in a core network. Some examples of a core network node include, e.g., a Mobility Management Entity (MME), a Packet Data Network Gateway (P-GW), a Service Capability Exposure Function (SCEF), or the like.
[0098] Wireless Device: As used herein, a “wireless device” is any type of device that has access to (i.e., is served by) a cellular communications network by wirelessly transmitting and/or receiving signals to a radio access node(s). Some examples of a wireless device include, but are not limited to, a User Equipment device (UE) in a 3GPP network and a Machine Type Communication (MTC) device.
[0099] Network Node: As used herein, a “network node” is any node that is either part of the radio access network or the core network of a cellular communications network/system.
[0100] Note that the description given herein focuses on a 3GPP cellular communications system and, as such, 3GPP terminology or terminology similar to 3GPP terminology is oftentimes used. However, the concepts disclosed herein are not limited to a 3GPP system.
[0101] Note that, in the description herein, reference may be made to the term “cell”; however, particularly with respect to 5G NR concepts, beams may be used instead of cells and, as such, it is important to note that the concepts described herein are equally applicable to both cells and beams.
[0102]
[0103] The base stations 602 and the low power nodes 606 provide service to wireless devices 612-1 through 612-5 in the corresponding cells 604 and 608. The wireless devices 612-1 through 612-5 are generally referred to herein collectively as wireless devices 612 and individually as wireless device 612. The wireless devices 612 are also sometimes referred to herein as UEs.
[0104]
[0105] Seen from the access side the 5G network architecture shown in
[0106] Reference point representations of the 5G network architecture are used to develop detailed call flows in the normative standardization. The N1 reference point is defined to carry signaling between the UE and AMF. The reference points for connecting between the AN and AMF and between the AN and User Plane Function (UPF) are defined as N2 and N3, respectively. There is a reference point, N11, between the AMF and SMF, which implies that the SMF is at least partly controlled by the AMF. N4 is used by the SMF and UPF so that the UPF can be set using the control signal generated by the SMF, and the UPF can report its state to the SMF. N9 is the reference point for the connection between different UPFs, and N14 is the reference point connecting between different AMFs, respectively. N15 and N7 are defined since the PCF applies policy to the AMF and SMP, respectively. N12 is required for the AMF to perform authentication of the UE. N8 and N10 are defined because the subscription data of the UE is required for the AMF and SMF.
[0107] The 5G core network aims at separating user plane and control plane. The user plane carries user traffic while the control plane carries signaling in the network. In
[0108] The core 5G network architecture is composed of modularized functions. For example, the AMF and SMF are independent functions in the control plane. Separated AMF and SMF allow independent evolution and scaling. Other control plane functions like the PCF and AUSF can be separated as shown in
[0109] Each NF interacts with another NF directly. It is possible to use intermediate functions to route messages from one NF to another NF. In the control plane, a set of interactions between two NFs is defined as service so that its reuse is possible. This service enables support for modularity. The user plane supports interactions such as forwarding operations between different UPFs.
[0110]
[0111] Some properties of the NFs shown in
[0112] An NF may be implemented either as a network element on a dedicated hardware, as a software instance running on a dedicated hardware, or as a virtualized function instantiated on an appropriate platform, e.g., a cloud infrastructure.
[0113] Configuring multi-TRP reliability scheme related information in the PDSCH-Config is unsuitable for the case when multiple DL SPS configurations can be simultaneously active since such configuration would then automatically apply to all DL SPS configurations which is very inflexible and a problem. Hence, it is an open problem how to configure multi-TRP reliability scheme related information for the case when multiple DL SPS configurations can be simultaneously active.
[0114] Systems and methods for multi-Transmission Reception Point (TRP) transmission for downlink Semi-Persistent Scheduling (SPS) are provided.
[0115]
[0116] Certain aspects of the present disclosure and their embodiments may provide solutions to the aforementioned or other challenges. The proposed solution provides a method of configuring a wireless device with a plurality of downlink SPS configurations that can be activated simultaneously wherein the plurality of SPS configurations have independent configuration of one or more of the following: a. Independent configuration of low latency and/or reliability schemes which are applicable when multiple Transmission Configuration Indicator (TCI) states are indicated to the wireless device; b. One or more properties related to low latency and/or reliability schemes which are applicable when multiple TCI states are indicated to the wireless device.
[0117] It should be noted that the possibility to have multiple SPS configurations to be simultaneously active for a given BWP of a serving cell is to be able to support different traffic types/characteristics simultaneously. Here, each active SPS configuration may correspond to a different traffic type/characteristic. Hence, the inventors have observed a need to tailor the different DL SPS configurations to possibly be configured with different multi-TRP reliability schemes that are suitable depending on the traffic type/characteristic.
[0118] It should be noted that having multiple SPS configurations that are simultaneously active for a given BWP of a serving enables support for different traffic types/characteristics simultaneously. Here, each active SPS configuration may correspond to a different traffic type/characteristic. Hence, there is a need to tailor the different DL SPS configurations to possibly be configured with different multi-TRP reliability schemes that are suitable depending on the traffic type/characteristic.
[0119] A straightforward solution would be to configure multi-TRP reliability scheme related information in the PDSCH-Config. However, this is unsuitable since such configuration would then apply to all DL SPS configurations with no differentiation. The core of the present disclosure is that different DL SPS configurations can have independent configuration of the use of multi-TRP reliability scheme, including that some DL SPS configurations don't utilize multi-TRP transmission and reception at all. We provide several embodiments addressing how to tailor a suitable multi-TRP reliability scheme specific to a DL SPS configuration.
[0120] Embodiment 1: In a first embodiment, the multi-TRP reliability scheme is configured as part of the DL SPS configuration. A higher layer parameter can be introduced in the DL SPS configuration that configures the use of multi-TRP operation. This parameter can be optionally present, and if absent, then no multi-TRP operation need to be considered for this DL SPS configuration. If present, the parameter may take one of a set of different values that characterizes the scheme of multi-TRP transmissions for reliability. For example, the list of values could be the four different modes of spatial multiplexing, frequency multiplexing, slot-based time multiplexing, mini-slot based time multiplexing.
[0121] For example, if a DL SPS configuration contains a higher layer parameter with value set to frequency multiplexing, then the frequency multiplexing based multi-TRP reliability scheme is applicable when this DL SPS configuration is activated.
[0122] In some variants of this embodiment, the multi-TRP reliability scheme which is configured in the DL SPS configuration only applies when the codepoint of the Transmission Configuration Indication field in the DCI activating the DL SPS configuration indicates more than one TCI state. If the codepoint only indicates a single TCI state, then a single TRP transmission should be assumed by the UE, and if the DL SPS configuration contains a higher layer parameter indicating a reliability scheme, then that configuration should be ignored for the activated DL SPS configuration.
In another variant of the first embodiment, the higher layer configuration introduced in the DL SPS configuration may indicate a combination of more than one multi-TRP reliability scheme. Such a combination may include one of the following: [0123] A combination of spatially multiplexed and frequency multiplexed scheme. [0124] A combination of frequency multiplexed and slot-based time multiplexed scheme. [0125] A combination of frequency multiplexed and mini-slot based time multiplexed scheme. [0126] A combination of spatially multiplexed and slot-based or mini-slot based multiplexed scheme
[0127] The above list is non-limiting, and the higher layer configuration introduced in the DL SPS configuration may indicate a combination that is not listed above.
[0128] Hence, the values signaled when configuring DL SPS indicate the combinations of reliability schemes also including allowed combinations, for example, frequency-and-slot-based time multiplexing.
[0129] Embodiment 2: In this embodiment, an indication of which multi-TRP reliability scheme should be attributed to a given DL SPS configuration is implicitly given by additional higher layer parameters configured in the given DL SPS configuration.
[0130] A first example is configuring a pdsch-AggregationFactor as part of the DL SPS configuration by higher layers. In this case, a UE may be configured with a pdsch-AggregationFactor of 2 in one DL SPS configuration and an pdsch-AggregationFactor of 4 in another DL SPS configuration. Hence, slot based time-multiplexing schemes with a different number of repetitions (i.e., different A pdsch-ggregationFactors) can be configured to different DL SPS configurations depending on the reliability requirements. One example of providing pdsch-AggregationFactor in SPS-Config is illustrated below, where the possible number of repetitions to configure is: 2, 4, 8, and 16.
SPS-Config Information Element
[0131]
TABLE-US-00009 -- ASN1START -- TAG-SPS-CONFIG-START SPS-Config : := SEQUENCE { periodicity ENUMERATED {ms10, ms20, ms32, ms40, ms64, ms80, ms128, ms160, ms320, ms640, spare6, spare5, spare4, spare3, spare2, spare1}, pdsch-AggregationFactor ENUMERATED { n2, n4, n8, n16 } OPTIONAL, -- Need S nrofHARQ-Processes INTEGER (1. .8), n1PUCCH-AN PUCCH-ResourceId OPTIONAL, -- Need M mcs-Table ENUMERATED {qam64LowSE} OPTIONAL, -- Need S . . . } -- TAG-SPS-CONFIG-STOP -- ASN1STOP
[0132] A second example is configuring frequency domain resource allocation information as part of the DL SPS configuration to support frequency multiplexing scheme. In one variant of the embodiment, the PRBs for the PDSCH from a first TRP (corresponding to a first TCI state indicated in the activating DCI) can be provided by the frequency domain resource allocation field of the activating DCI; the location of the PRBs for the PDSCH from a second TRP (corresponding to a second TCI state indicated in the activating DCI) can be provided as an offset as part of the DL SPS configuration. That is, if the activating DCI indicates PRBs {i, i+1, . . . , i+K} for the PDSCH from TRP1, then an offset ΔK configured in the DL SPS configuration provides the PRBs for the PDSCH from TRP2 as {i+ΔK, i+ΔK+1, . . . , i+ΔK+K}. It should be noted that the number of frequency domain allocations can also be provided as part of each DL SPS configuration by configuring one or more ΔK values where each ΔK value provides the PRB offset for a different TRP.
[0133] Alternatively, in another embodiment, the RBs for the PDSCH from all TRPs are provided by the frequency domain resource allocation field of the activating DCI. The RBs are interleaved among the TRPs, starting from the first TRP, in a granularity that can be either configured by higher layer or specified, such as number of RBs.
[0134] A third example is configuring time domain resource allocation information as part of the DL SPS configuration to support mini-slot based time multiplexing scheme. Specifically, a list of time domain resource allocations can be configured as part of the DL SPS configuration where each time domain resource allocation may provide the PDSCH mapping type (i.e., type A/slot-based or type B/mini-slot-based), start symbol and symbol duration of PDSCH, and the slot offset for HARQ-ACK-NACK feedback. By making the list of time domain resource allocations specific to DL SPS configuration, a suitable set of time domain resource allocations can be configured per DL SPS and the activating DCI can select one of the configured time domain resource allocations.
[0135] A fourth example is configuring additional TCI states per DL SPS configuration. As per current agreements in rel-16, the transmission configuration indication field can indicate either 1 or two TCI states. Hence, if additional reliability is desired via using more than 2 TRPs (i.e., more than two TCI states), then these additional TCI states can be configured as part of DL SPS configuration.
[0136] Embodiment 3: In this embodiment, the transmission configuration indication field in the activating/deactivating DCI is used to differentiate which DL SPS configuration is to be activated. The number of TCI states can be configured as part of DL SPS configuration. Then, [0137] if the activation DCI indicates 1 TCI state in its transmission configuration indication field, then one of the DL SPS configurations with 1 TCI state configured is activated, [0138] if the activation DCI indicates 2 TCI state in its transmission configuration indication field, then one of the DL SPS configurations with 2 TCI state configured is activated, [0139] if the activation DCI indicates 4 TCI state in its transmission configuration indication field, then one of the DL SPS configurations with 4 TCI state configured is activated.
[0140] If multiple SPS configurations are configured with N TCI states, then which SPS configuration among these multiple SPS configurations is activated may be dependent on other fields in the activation DCI.
[0141] For release (i.e., deactivation) DCI, the TCI state is not needed. Hence the TCI field can be used as a special field for DL SPS release PDCCH validation. For example, if a DCI format containing TCI field is used as release DCI, then the TCI field can be set to a predefined value for validation of the release DCI. The predefined value can be all “1”s.
[0142] Embodiment 4: For DL SPS, the RV field of a DCI in activating a DL SPS is set to all “0”s for validation purpose. Therefore, when slot aggregation is configured, a fixed RV sequence of (0, 2, 3, 1) is applied over consecutive slots according to Table 5.1.2.1-2. Note that a PDSCH with RV=0 contains all the systematic bits of a codeword and is self-decodable in general, while a PDSCH with RV=2 or 1 does not contain the systematic bits and is not self-decodable in general, and typically needs to be combined and PDSCH with RV=0 to decode. This fixed RV sequence is not an issue for single TRP transmission as the PDSCHs are transmitted over the same channel between a TRP and a UE and the UE can combine the PDSCHs to achieve more reliable decoding of a TB. When multiple TRPs are deployed and a TB is also repeated over TRPs, this fixed RV sequence is not desirable. This is because the channels of TRPs to a UE can be different, and if PDSCH with RV=0 is transmitted over a TRP with bad channel, it could degrade the overall decoding performance. Therefore, it is desirable to transmit PDSCH with RV=0 over a TRP with good channel if the channel condition is known at the gNB. If the channel condition is unknown to the gNB, it should allow a different RV sequence to be used in a retransmission or using different sequences at different times.
[0143] Thus, in one embodiment, the TRPs and the order of the TRPs for a SPS transmission are signaled using the TCI field of a DCI activating the SPS. The first TRP is mapped to the first RV in the sequence; the second TRP is mapped to the second RV in the RV sequence, and so on. In this way, the TRP order may be changed through a reactivation of the same SPS by sending a new DCI to the UE if the channel conditions of the TRPs have been changed.
[0144] In case of mini-slot based TDM scheme and FR2, it is desirable to reduce beam switching times with a slot. For example, if there are two TRPs and 4 mini-slots, a transmission pattern of (TRP1, TRP1, TRP2, TRP2) over the four mini-slots is preferred instead of using (TRP1, TRP2, TRP1, TRP2) which needs two more beam switches. Thus, in another embodiment, a same TCI state (or TRP) may be allowed to be duplicated when indicated by the TCI field to indicate a PDSCH repetition from a TRP over more than one mini-slot.
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[0147] As used herein, a “virtualized” radio access node is an implementation of the radio access node 1300 in which at least a portion of the functionality of the radio access node 1300 is implemented as a virtual component(s) (e.g., via a virtual machine(s) executing on a physical processing node(s) in a network(s)). As illustrated, in this example, the radio access node 1300 includes the control system 1302 that includes the one or more processors 1304 (e.g., CPUs, ASICs, FPGAs, and/or the like), the memory 1306, and the network interface 1308 and the one or more radio units 1310 that each includes the one or more transmitters 1312 and the one or more receivers 1314 coupled to the one or more antennas 1316, as described above. The control system 1302 is connected to the radio unit(s) 1310 via, for example, an optical cable or the like. The control system 1302 is connected to one or more processing nodes 1400 coupled to or included as part of a network(s) 1402 via the network interface 1308. Each processing node 1400 includes one or more processors 1404 (e.g., CPUs, ASICs, FPGAs, and/or the like), memory 1406, and a network interface 1408.
[0148] In this example, functions 1410 of the radio access node 1300 described herein are implemented at the one or more processing nodes 1400 or distributed across the control system 1302 and the one or more processing nodes 1400 in any desired manner. In some particular embodiments, some or all of the functions 1410 of the radio access node 1300 described herein are implemented as virtual components executed by one or more virtual machines implemented in a virtual environment(s) hosted by the processing node(s) 1400. As will be appreciated by one of ordinary skill in the art, additional signaling or communication between the processing node(s) 1400 and the control system 1302 is used in order to carry out at least some of the desired functions 1410. Notably, in some embodiments, the control system 1302 may not be included, in which case the radio unit(s) 1310 communicate directly with the processing node(s) 1400 via an appropriate network interface(s).
[0149] In some embodiments, a computer program including instructions which, when executed by at least one processor, causes the at least one processor to carry out the functionality of radio access node 1300 or a node (e.g., a processing node 1400) implementing one or more of the functions 1410 of the radio access node 1300 in a virtual environment according to any of the embodiments described herein is provided. In some embodiments, a carrier comprising the aforementioned computer program product is provided. The carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non-transitory computer readable medium such as memory).
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[0152] In some embodiments, a computer program including instructions which, when executed by at least one processor, causes the at least one processor to carry out the functionality of the UE 1600 according to any of the embodiments described herein is provided. In some embodiments, a carrier comprising the aforementioned computer program product is provided. The carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non-transitory computer readable medium such as memory).
[0153]
[0154] With reference to
[0155] The telecommunication network 1800 is itself connected to a host computer 1816, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server, or as processing resources in a server farm. The host computer 1816 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. Connections 1818 and 1820 between the telecommunication network 1800 and the host computer 1816 may extend directly from the core network 1804 to the host computer 1816 or may go via an optional intermediate network 1822. The intermediate network 1822 may be one of, or a combination of more than one of, a public, private, or hosted network; the intermediate network 1822, if any, may be a backbone network or the Internet; in particular, the intermediate network 1822 may comprise two or more sub-networks (not shown).
[0156] The communication system of
[0157] Example implementations, in accordance with an embodiment, of the UE, base station, and host computer discussed in the preceding paragraphs will now be described with reference to
[0158] The communication system 1900 further includes a base station 1918 provided in a telecommunication system and comprising hardware 1920 enabling it to communicate with the host computer 1902 and with the UE 1914. The hardware 1920 may include a communication interface 1922 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the communication system 1900, as well as a radio interface 1924 for setting up and maintaining at least a wireless connection 1926 with the UE 1914 located in a coverage area (not shown in
[0159] The communication system 1900 further includes the UE 1914 already referred to. The UE's 1914 hardware 1934 may include a radio interface 1936 configured to set up and maintain a wireless connection 1926 with a base station serving a coverage area in which the UE 1914 is currently located. The hardware 1934 of the UE 1914 further includes processing circuitry 1938, which may comprise one or more programmable processors, ASICs, FPGAs, or combinations of these (not shown) adapted to execute instructions. The UE 1914 further comprises software 1940, which is stored in or accessible by the UE 1914 and executable by the processing circuitry 1938. The software 1940 includes a client application 1942. The client application 1942 may be operable to provide a service to a human or non-human user via the UE 1914, with the support of the host computer 1902. In the host computer 1902, the executing host application 1912 may communicate with the executing client application 1942 via the OTT connection 1916 terminating at the UE 1914 and the host computer 1902. In providing the service to the user, the client application 1942 may receive request data from the host application 1912 and provide user data in response to the request data. The OTT connection 1916 may transfer both the request data and the user data. The client application 1942 may interact with the user to generate the user data that it provides.
[0160] It is noted that the host computer 1902, the base station 1918, and the UE 1914 illustrated in
[0161] In
[0162] The wireless connection 1926 between the UE 1914 and the base station 1918 is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to the UE 1914 using the OTT connection 1916, in which the wireless connection 1926 forms the last segment. More precisely, the teachings of these embodiments may improve the latency and/or reliability of communication via multiple transmission points when a wireless device has more than one active semi-persistent scheduling configuration active and thereby provide benefits such as improved latency and reliability.
[0163] A measurement procedure may be provided for the purpose of monitoring data rate, latency, and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring the OTT connection 1916 between the host computer 1902 and the UE 1914, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring the OTT connection 1916 may be implemented in the software 1910 and the hardware 1904 of the host computer 1902 or in the software 1940 and the hardware 1934 of the UE 1914, or both. In some embodiments, sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 1916 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which the software 1910, 1940 may compute or estimate the monitored quantities. The reconfiguring of the OTT connection 1916 may include message format, retransmission settings, preferred routing, etc.; the reconfiguring need not affect the base station 1918, and it may be unknown or imperceptible to the base station 1918. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling facilitating the host computer 1902's measurements of throughput, propagation times, latency, and the like. The measurements may be implemented in that the software 1910 and 1940 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 1916 while it monitors propagation times, errors, etc.
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[0168] Any appropriate steps, methods, features, functions, or benefits disclosed herein may be performed through one or more functional units or modules of one or more virtual apparatuses. Each virtual apparatus may comprise a number of these functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessor or microcontrollers, as well as other digital hardware, which may include Digital Signal Processor (DSPs), special-purpose digital logic, and the like. The processing circuitry may be configured to execute program code stored in memory, which may include one or several types of memory such as Read Only Memory (ROM), Random Access Memory (RAM), cache memory, flash memory devices, optical storage devices, etc. Program code stored in memory includes program instructions for executing one or more telecommunications and/or data communications protocols as well as instructions for carrying out one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure.
[0169] While processes in the figures may show a particular order of operations performed by certain embodiments of the present disclosure, it should be understood that such order is exemplary (e.g., alternative embodiments may perform the operations in a different order, combine certain operations, overlap certain operations, etc.).
Embodiments
Group A Embodiments
[0170] Embodiment 1: A method performed by a wireless device for configuring one or more wireless communications settings, the method comprising one or more of the following: determining a plurality of wireless communications configurations; simultaneously activating at least two of the plurality of wireless communications configurations such that the at least two of the plurality of wireless communications configurations include independent configuration of one or more of a low latency and/or reliability scheme and one or more properties related to the low latency and/or reliability scheme.
[0171] Embodiment 2: The method of the previous embodiment wherein simultaneously activating the at least two of the plurality of wireless communications configurations such that the at least two of the plurality of wireless communications configurations include independent configuration of one or more of the low latency and/or reliability scheme and the one or more properties related to the low latency and/or reliability scheme is performed only when the wireless device is simultaneously communicating with multiple transmission points.
[0172] Embodiment 3: The method of the previous embodiment wherein the wireless device determines it is communicating with multiple transmission points by receiving multiple TCI states at the wireless device.
[0173] Embodiment 4: The method of the previous embodiment wherein receiving multiple TCI states corresponds to reception of downlink SPS from multiple transmission points.
[0174] Embodiment 5: The method of any of the previous embodiments wherein the wireless device simultaneously activates the at least two of the plurality of wireless communications configurations in response to an activating DCI.
[0175] Embodiment 6: The method of any of the previous embodiments wherein the plurality of wireless communications configurations are semi-persistent scheduling (SPS) configurations.
[0176] Embodiment 7: The method of any of the previous embodiments wherein determining the plurality of wireless communications configurations comprises communicating with a network node to determine the plurality of wireless communications configurations.
[0177] Embodiment 8: The method of the previous embodiment determining the plurality of wireless communications configurations is done via RRC.
[0178] Embodiment 9: The method of any of the previous embodiments wherein the low latency scheme and the reliability scheme include one or more of spatial multiplexing, frequency multiplexing, slot-based time multiplexing, and mini-slot based time multiplexing.
[0179] Embodiment 10: The method of any of the previous embodiments wherein the one or more properties related to the low latency scheme and the one or more properties related to the reliability scheme include one or more of an aggregation factor for slot based time repetition, a frequency domain resource allocation information for frequency repetition, a time domain resource allocation information for time repetition, and a configuration of additional TCI states in addition to what is indicated in the activating DCI.
[0180] Embodiment 11: The method of any of the previous embodiments wherein the at least two of the plurality of wireless communications configurations are chosen based on a control message from a network node.
[0181] Embodiment 12: The method of the previous embodiment wherein the control message is a DCI message.
[0182] Embodiment 13: The method of the previous embodiment wherein the at least two of the plurality of wireless communications configurations are chosen based on a TCI field in the DCI message.
[0183] Embodiment 14: The method of any of the previous embodiments, further comprising: providing user data; and forwarding the user data to a host computer via the transmission to the base station.
Group B Embodiments
[0184] Embodiment 15: A method performed by a base station for configuring one or more wireless communications settings, the method comprising one or more of the following: communicating with a wireless device such that a plurality of wireless communications configurations are configured for the wireless device; and communicating with the wireless device such that at least two of the plurality of wireless communications configurations are simultaneously activated and the at least two of the plurality of wireless communications configurations include independent configuration of one or more of a low latency and/or reliability scheme and one or more properties related to the low latency and/or reliability scheme.
[0185] Embodiment 16: The method of the previous embodiment wherein communicating with the wireless device such that at least two of the plurality of wireless communications configurations are simultaneously activated and the at least two of the plurality of wireless communications configurations include independent configuration of one or more of the low latency and/or reliability scheme and the one or more properties related to the low latency and/or reliability scheme is performed only when the wireless device is simultaneously communicating with at least two transmission points.
[0186] Embodiment 17: The method of any of the previous embodiments wherein communicating with the wireless device such that at least two of the plurality of wireless communications configurations are simultaneously activated and the at least two of the plurality of wireless communications configurations include independent configuration of one or more of the low latency and/or reliability scheme and the one or more properties related to the low latency and/or reliability scheme comprises sending an activating DCI to the wireless device.
[0187] Embodiment 18: The method of any of the previous embodiments wherein the wireless communications configurations are semi-persistent scheduling (SPS) configurations.
[0188] Embodiment 19: The method of any of the previous embodiments wherein communicating with the wireless device such that the plurality of wireless communications configurations are configured for the wireless device is performed via RRC signaling.
[0189] Embodiment 20: The method of any of the previous embodiments wherein the low latency scheme and the reliability scheme include one or more of spatial multiplexing, frequency multiplexing, slot-based time multiplexing, and mini-slot based time multiplexing.
[0190] Embodiment 21: The method of any of the previous embodiments wherein the one or more properties related to the low latency scheme and the one or more properties related to the reliability scheme include one or more of an aggregation factor for slot based time repetition, a frequency domain resource allocation information for frequency repetition, a time domain resource allocation information for time repetition, and a configuration of additional TCI states in addition to what is indicated in the activating DCI.
[0191] Embodiment 22: The method of any of the previous embodiments, further comprising: obtaining user data; and forwarding the user data to a host computer or a wireless device.
Group C Embodiments
[0192] Embodiment 23: A wireless device for configuring one or more wireless communications settings, the wireless device comprising: processing circuitry configured to perform any of the steps of any of the Group A embodiments; and power supply circuitry configured to supply power to the wireless device.
[0193] Embodiment 24: A base station for configuring one or more wireless communications settings, the base station comprising: processing circuitry configured to perform any of the steps of any of the Group B embodiments; and power supply circuitry configured to supply power to the base station.
[0194] Embodiment 25: A User Equipment, UE, for configuring one or more wireless communications settings, the UE comprising: an antenna configured to send and receive wireless signals; radio front-end circuitry connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry; the processing circuitry being configured to perform any of the steps of any of the Group A embodiments; an input interface connected to the processing circuitry and configured to allow input of information into the UE to be processed by the processing circuitry; an output interface connected to the processing circuitry and configured to output information from the UE that has been processed by the processing circuitry; and a battery connected to the processing circuitry and configured to supply power to the UE.
[0195] Embodiment 26: A communication system including a host computer comprising: processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a User Equipment, UE; wherein the cellular network comprises a base station having a radio interface and processing circuitry, the base station's processing circuitry configured to perform any of the steps of any of the Group B embodiments.
[0196] Embodiment 27: The communication system of the previous embodiment further including the base station.
[0197] Embodiment 28: The communication system of the previous 2 embodiments, further including the UE, wherein the UE is configured to communicate with the base station.
[0198] Embodiment 29: The communication system of the previous 3 embodiments, wherein: the processing circuitry of the host computer is configured to execute a host application, thereby providing the user data; and the UE comprises processing circuitry configured to execute a client application associated with the host application.
[0199] Embodiment 30: A method implemented in a communication system including a host computer, a base station, and a User Equipment, UE, the method comprising: at the host computer, providing user data; and at the host computer, initiating a transmission carrying the user data to the UE via a cellular network comprising the base station, wherein the base station performs any of the steps of any of the Group B embodiments.
[0200] Embodiment 31: The method of the previous embodiment, further comprising, at the base station, transmitting the user data.
[0201] Embodiment 32: The method of the previous 2 embodiments, wherein the user data is provided at the host computer by executing a host application, the method further comprising, at the UE, executing a client application associated with the host application.
[0202] Embodiment 33: A User Equipment, UE, configured to communicate with a base station, the UE comprising a radio interface and processing circuitry configured to perform the method of the previous 3 embodiments.
[0203] Embodiment 34: A communication system including a host computer comprising: processing circuitry configured to provide user data; and a communication interface configured to forward user data to a cellular network for transmission to a User Equipment, UE; wherein the UE comprises a radio interface and processing circuitry, the UE's components configured to perform any of the steps of any of the Group A embodiments.
[0204] Embodiment 35: The communication system of the previous embodiment, wherein the cellular network further includes a base station configured to communicate with the UE.
[0205] Embodiment 36: The communication system of the previous 2 embodiments, wherein: the processing circuitry of the host computer is configured to execute a host application, thereby providing the user data; and the UE's processing circuitry is configured to execute a client application associated with the host application.
[0206] Embodiment 37: A method implemented in a communication system including a host computer, a base station, and a User Equipment, UE, the method comprising: at the host computer, providing user data; and at the host computer, initiating a transmission carrying the user data to the UE via a cellular network comprising the base station, wherein the UE performs any of the steps of any of the Group A embodiments.
[0207] Embodiment 38: The method of the previous embodiment, further comprising at the UE, receiving the user data from the base station.
[0208] Embodiment 39: A communication system including a host computer comprising: communication interface configured to receive user data originating from a transmission from a User Equipment, UE, to a base station; wherein the UE comprises a radio interface and processing circuitry, the UE's processing circuitry configured to perform any of the steps of any of the Group A embodiments.
[0209] Embodiment 40: The communication system of the previous embodiment, further including the UE.
[0210] Embodiment 41: The communication system of the previous 2 embodiments, further including the base station, wherein the base station comprises a radio interface configured to communicate with the UE and a communication interface configured to forward to the host computer the user data carried by a transmission from the UE to the base station.
[0211] Embodiment 42: The communication system of the previous 3 embodiments, wherein: the processing circuitry of the host computer is configured to execute a host application; and the UE's processing circuitry is configured to execute a client application associated with the host application, thereby providing the user data.
[0212] Embodiment 43: The communication system of the previous 4 embodiments, wherein: the processing circuitry of the host computer is configured to execute a host application, thereby providing request data; and the UE's processing circuitry is configured to execute a client application associated with the host application, thereby providing the user data in response to the request data.
[0213] Embodiment 44: A method implemented in a communication system including a host computer, a base station, and a User Equipment, UE, the method comprising: at the host computer, receiving user data transmitted to the base station from the UE, wherein the UE performs any of the steps of any of the Group A embodiments.
[0214] Embodiment 45: The method of the previous embodiment, further comprising, at the UE, providing the user data to the base station.
[0215] Embodiment 46: The method of the previous 2 embodiments, further comprising: at the UE, executing a client application, thereby providing the user data to be transmitted; and at the host computer, executing a host application associated with the client application.
[0216] Embodiment 47: The method of the previous 3 embodiments, further comprising: at the UE, executing a client application; and at the UE, receiving input data to the client application, the input data being provided at the host computer by executing a host application associated with the client application; wherein the user data to be transmitted is provided by the client application in response to the input data.
[0217] Embodiment 48: A communication system including a host computer comprising a communication interface configured to receive user data originating from a transmission from a User Equipment, UE, to a base station, wherein the base station comprises a radio interface and processing circuitry, the base station's processing circuitry configured to perform any of the steps of any of the Group B embodiments.
[0218] Embodiment 49: The communication system of the previous embodiment further including the base station.
[0219] Embodiment 50: The communication system of the previous 2 embodiments, further including the UE, wherein the UE is configured to communicate with the base station.
[0220] Embodiment 51: The communication system of the previous 3 embodiments, wherein: the processing circuitry of the host computer is configured to execute a host application; and the UE is configured to execute a client application associated with the host application, thereby providing the user data to be received by the host computer.
[0221] Embodiment 52: A method implemented in a communication system including a host computer, a base station, and a User Equipment, UE, the method comprising: at the host computer, receiving, from the base station, user data originating from a transmission which the base station has received from the UE, wherein the UE performs any of the steps of any of the Group A embodiments.
[0222] Embodiment 53: The method of the previous embodiment, further comprising at the base station, receiving the user data from the UE.
[0223] Embodiment 54: The method of the previous 2 embodiments, further comprising at the base station, initiating a transmission of the received user data to the host computer.
Group D Embodiments
[0224] Embodiment 55: A method of configuring a wireless device with plurality of downlink semi-persistent scheduling (SPS) configurations that can be activated simultaneously wherein the plurality of SPS configurations have independent configuration of one or more of the following: independent configuration of low latency and/or reliability schemes which are applicable when multiple TCI states are indicated to the wireless device; and one or more properties related to low latency and/or reliability schemes which are applicable when multiple TCI states are indicated to the wireless device.
[0225] Embodiment 56: The method of the first embodiment of Group D where the plurality of downlink SPS are RRC configured.
[0226] Embodiment 57: The method of the first embodiment of Group D where the simultaneous activation of the plurality of downlink SPS configurations is done via an activating DCI.
[0227] Embodiment 58: The method of any of the first through third embodiments of Group D where the multiple TCI states are indicated to the wireless device by the activating DCI.
[0228] Embodiment 59: The method of any of the first through fourth embodiments of Group D, where the indication of multiple TCI states corresponds to reception of downlink SPS from multiple TRPs or multiple panels.
[0229] Embodiment 60: The method of any of the first through fifth embodiments of Group D, where if multiple TCI states are not indicated (i.e., a single TCI state is indicated) when activating a given downlink SPS configuration, then the reliability schemes or the properties of the reliability schemes is not configured for the given downlink SPS configuration.
[0230] Embodiment 61: The method of any of the first through fifth embodiments of Group D, where if multiple TCI states are not indicated (i.e., a single TCI state is indicated) when activating a given downlink SPS configuration, then the reliability schemes or the properties of the reliability schemes which may be configured for the given downlink SPS configuration are not utilized (i.e., ignored) by the wireless device.
[0231] Embodiment 62: The method of any of the first through seventh embodiments of Group D, where the low latency and/or reliability schemes can be any one or a combination of spatial multiplexing, frequency multiplexing, slot-based time multiplexing, mini-slot based time multiplexing.
[0232] Embodiment 63: The method of any of the first through seventh embodiments of Group D, where the one or more properties related to low latency and/or reliability schemes may include the configuration of an aggregation factor for slot based time repetition, a frequency domain resource allocation information for frequency repetition, a time domain resource allocation information for time repetition, or a configuration of additional TCI states in addition to what is indicated in the activating DCI.
[0233] Embodiment 64: The method of any of the first through ninth embodiments of Group D where the transmission configuration indication field in the activating/deactivating DCI is used to differentiate which DL SPS configuration is to be activated/deactivated.
[0234] Embodiment 65: The method of any of the first through tenth embodiments of Group D where the order of TCI states indicated by the codepoint of the transmission configuration indication field may be changed by resending the activating DCI in order to associated different TCI states with different RVs.
[0235] At least some of the following abbreviations may be used in this disclosure. If there is an inconsistency between abbreviations, preference should be given to how it is used above. If listed multiple times below, the first listing should be preferred over any subsequent listing(s). [0236] 3GPP Third Generation Partnership Project [0237] 5G Fifth Generation [0238] AF Application Function [0239] AMF Access and Mobility Function [0240] AN Access Network [0241] AP Access Point [0242] ASIC Application Specific Integrated Circuit [0243] AUSF Authentication Server Function [0244] BWP Bandwidth Part [0245] CDM Code Division Multiplexing [0246] CP-OFDM Cyclic Prefix Orthogonal Frequency Division Multiplexing [0247] CPU Central Processing Unit [0248] CRB Common Resource Block [0249] DCI Downlink Channel Information [0250] DFT Discrete Fourier Transform [0251] DFT-S-OFDM DFT Spread Orthogonal Frequency Division Multiplexing [0252] DMRS Demodulation Reference Signal [0253] DN Data Network [0254] DSP Digital Signal Processor [0255] eNB Enhanced or Evolved Node B [0256] FPGA Field Programmable Gate Array [0257] FR Frequency Range [0258] gNB New Radio Base Station [0259] IE Information Element [0260] IIoT Industrial Internet of Things [0261] IoT Internet of Things [0262] IP Internet Protocol [0263] LTE Long Term Evolution [0264] MME Mobility Management Entity [0265] MTC Machine Type Communication [0266] NEF Network Exposure Function [0267] NF Network Function [0268] NR New Radio [0269] NRF Network Function Repository Function [0270] NSSF Network Slice Selection Function [0271] OTT Over-the-Top [0272] PBCH Physical Broadcasting Channel [0273] PCF Policy Control Function [0274] PDCCH Physical Downlink Control Channel [0275] PDCH Physical Data Channel [0276] PDSCH Physical Downlink Shared Channel [0277] P-GW Packet Data Network Gateway [0278] PRB Physical Resource Block [0279] PUSCH Physical Uplink Shared Channel [0280] QCL Quasi Co-Located [0281] QoS Quality of Service [0282] RAM Random Access Memory [0283] RAN Radio Access Network [0284] RB Resource Block [0285] RE Resource Element [0286] ROM Read Only Memory [0287] RRC Radio Resource Control [0288] RRH Remote Radio Head [0289] RU Round Trip Time [0290] RV Redundancy Version [0291] SCEF Service Capability Exposure Function [0292] SINR Signal to Interference plus Noise Ratio [0293] SMF Session Management Function [0294] SPS Semi-Persistent Scheduling [0295] TCI Transmission Configuration Indicator [0296] TDRA Time Domain Resource Allocation [0297] TRP Transmission Reception Point [0298] TRS Tracking Reference Signal [0299] TS Technical Specification [0300] UDM Unified Data Management [0301] UE User Equipment [0302] UPF User Plane Function [0303] URLLC Ultra Reliable Low Latency Communication
[0304] Those skilled in the art will recognize improvements and modifications to the embodiments of the present disclosure. All such improvements and modifications are considered within the scope of the concepts disclosed herein.