A first and a second communication device and a respective method performed by the first and the second communication device for communicating via radio between the first and the second communication device are provided. The method in the first communication device comprises receiving a first transmission from the second communication device. The method further comprises determining a Reference Signal (RS) configuration based on the received transmissions; and transmitting the RS configuration to the second communication device, the determined RS configuration enabling communication between the first and the second communication device.

Certain aspects of the present disclosure provide techniques for determining when to transmit and transmitting an aperiodic tracking reference signal (TRS). Certain aspects provide a method for wireless communication. The method generally includes determining a channel condition change of a downlink channel between a first wireless device and a second wireless device. The method further includes determining whether the channel condition change satisfies a trigger condition. The method further includes triggering transmission of an aperiodic tracking reference signal when the channel condition change satisfies the trigger condition.

A method includes determining that a change is needed to a configuration of a user equipment (UE) centric cloud cell, where the determining is in accordance with measurement reports of beam-formed reference signals transmitted by mmWave TPs of a measurement set, and when the change comprises a change to a modulation coding scheme (MCS) level of a communications link associated with the UE centric cloud cell, adjusting the MCS level of the communications link. The method includes when the change comprises at least one of a change to a communications beam or a mmWave TP change, sending a change query requesting the at least one of the change to the communications beam or the mmWave TP change, and receiving from a central controller a confirmation message. The method includes updating a mmWave UE and second mmWave TPs of the UE centric cloud cell regarding the change.

The present invention relates to a method and an apparatus for transmitting and receiving a reference signal in a wireless communication system. In the method, in order to dynamically switch an uplink (UL) Demodulation-Reference Signal (DM-RS) according to the communication environment, such as CoMP and MU-MIMO, a parameter set for generation of a reference signal sequence is configured to include a Virtual Cell Identifier (VCID) parameter configured by information of a total of 9 bits and a cyclic shift hopping initial value parameter c.sub.init.sup.CSH, which is 9-bit information representing one integer value among 510 integer values. Therefore, it may be possible to achieve dynamic transmission or reception of a reference signal and channel estimation through the dynamic transmission or reception of the reference signal even when the communication environment dynamically changes as in a Cooperative Multiple Point transmission and reception (CoMP) scenario.

A data exchange method in a Coordinated Multi-Point (CoMP), system, including an assistant point and a converging point. One method comprises selecting a predetermined number of subbands with the best channel quality, and exchanging user data of the selected subbands. Only part of the user data received at the assistant point is transmitted to the converging point. The requirement on the transport network capacity is thus loosened. By transmitting data with the best channel quality, a good enough gain is guaranteed.

A system and method for providing media access control for networked nodes over a plurality of channels. Each channel is divided into a number of time slots per frame of data organized in a channel allocation schedule. The number of time slots is selected for each channel and is greater than or equal to one per second. Each time slot has a slot transfer rate equal to or less than the maximum channel transfer rate. A server receives a request for channel resources that includes a bandwidth requirement. At least one time slot in a channel corresponding to the bandwidth requirement over a frame time is identified and sent to the requesting node.

A backhaul radio is disclosed that operates in multipath propagation environments such as obstructed LOS conditions with uncoordinated interference sources in the same operating band. Such a backhaul radio may use a combination of interference mitigation procedures across multiple of the frequency, time, spatial and cancellation domains. Such backhaul radios may communicate with each other to coordinate radio resource allocations such that accurate interference assessment and channel propagation characteristics assessment may be determined during normal operation.

There is disclosed a method of operating a wireless device in a wireless communication network, the wireless device being triggered for transmission of first control information on a first transmission resource from a first set of transmission resources, the wireless device further being triggered for transmission of second control information on a second transmission resource from a second set of transmission resources, the method including transmitting the first control information and the second control information multiplexed on a common transmission resource, the common transmission resource being one transmission resource from a pool of resources available to the wireless device. The disclosure also pertains to related devices and methods.

An optimal mode is selected in a coordinated transmission, depending on a situation of a network, and thus, it is possible to increase performance of a system. Coordinated mode selector (112) selects a JT mode in a case where X2 transmission time included in feedback information received from another base station is less than a second threshold, and selects a Blanking mode in a case where the X2 transmission time is greater than or equal to the second threshold. Base station to base station coordinating controller (113) performs base station to base station coordination control between another base station and a base station so as to perform a coordinated mode stored in memory unit (104) in a case where the coordinated transmission starts, and performs the base station to base station coordination control between another base station and the base station again so as to perform the coordinated mode newly selected in a case where the coordinated mode selected by coordinated mode selector (112) changes.

The present application provides a method for enhancing reliability of wireless communication, comprising: monitoring, by a user equipment (UE), quality of downlink transmission between the UE and a base station (BS); and measuring, by the UE in response to a trigger event, transmission quality of at least one beam used for the downlink transmission between the UE and the BS, wherein the trigger event is used to indicate that quality of the downlink transmission between the UE and the BS does not meet a first preset condition. The present application further discloses another method for enhancing reliability of wireless communication and a related device and system. By means of the solutions disclosed in the present application, transmission quality of a beam used for uplink/downlink transmission between a BS and a UE can be non-periodically measured based on event trigger, which improves real-time performance of detection and greatly enhances reliability of wireless communication.