A mobile device may be configured to communicate across at least a first carrier and a second carrier. The mobile device can be configured to monitor a downlink control channel on the first carrier. The device can receive a first command from the network node to monitor a downlink control channel on the second carrier. Based on receiving the first command from the network node, the device can monitor the downlink control channel on the first carrier or the downlink control channel on the second carrier or both the downlink control channel on the first carrier and the downlink control channel on the second carrier.

A method for receiving a signal by a terminal, having a plurality of cells configured, in a wireless communication system according to an embodiment of the present invention comprises the steps of: assuming a first uplink subframe of a first cell, having a time division duplex (TDD) frame structure among a plurality of cells, to be a downlink subframe on the basis of a predetermined condition and blind-decoding same; and, if a downlink grant with respect to a second cell, located in an unlicensed band among the plurality of cells, is detected by means of the blind-decoding, receiving downlink data through the second cell, wherein the first uplink subframe is indicated as an uplink subframe by means of a first uplink-downlink subframe configuration in an enhanced interface mitigation and traffic adaptation (eIMTA) fallback comprised in a system information block type 1 (SIB 1) and at the same time is indicated as a downlink subframe by means of downlink hybrid automatic repeat request (HARQ) reference configuration in the eIMTA fallback.

Methods and structures are disclosed which facilitate handling discontinuous reception (DRX) in Long Term Evolution (LTE) type communication signal reception and transmission using one carrier, such as a licensed carrier, and another carrier, such as an unlicensed carrier, in the presence of other transmissions using the other carrier.

A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4.sup.th-Generation (4G) system with a technology for Internet of Things (IoT) are provided. The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method and apparatus of activating/deactivating cells with scalable transmission time intervals (TTIs) is disclosed.

An apparatus and method for flexible adjustment of the uplink-downlink ratio configuration for each enhanced node B (eNodeB) within a wireless communications network is disclosed herein. In one embodiment, a given eNodeB is configured to determine a current or subsequent uplink-downlink ratio configuration for a pre-determined time period. The determined current or subsequent uplink-downlink ratio configuration is encoded into a special physical downlink control channel (PDCCH), the special PDCCH included in at least one radio frame according to the pre-determined time period. The radio frame including the special PDCCH is transmitted to user equipment served by the given eNodeB.

Embodiments include a physical resource block scheduling method, network device, and system, which may be used to perform scheduling request indicator SRI scheduling. The method includes: receiving a scheduling request indicator SRI sent by user equipment UE; allocating M PRBs to the UE according to a reference quantity of bits for scheduling; receiving, on a physical uplink shared channel, an uplink transmission block TB that is sent, in response to current-time SRI scheduling, by the UE; and determining, according to the uplink TB, a reference quantity of bits for scheduling for next-time SRI scheduling of the UE.

Methods and apparatus are provided for transmission preemption and its indication. In one novel aspect, the UE receives a downlink resource assignment and determines whether an ultra-low latency (ULL) alert signal exists, wherein the ULL alert signal indicates a set of soft bits are overridden. The UE discards the set of soft bits from the overridden resources upon determining the ULL alert signal exists. In one embodiment, the ULL alert signal resides in the assignment subframe, and the overridden soft bits are in the assignment subframe. The alert timing for the ULL alert signal is preconfigured. In another embodiment, the ULL alert signal resides in a subframe that is right after the assignment subframe. The alert signal is enabled through an enabling of an enhanced mobile broadband and ULL service. The alter signal indicates a superset of the overridden soft bits or part of the overridden soft bits.

A user equipment (UE) and base station (BS) in a wireless communication network. The UE includes a receiver configured to receive at least one semi-persistent scheduling (SPS) configuration among a plurality of SPS configurations from a BS. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The UE also includes a transmitter configured to transmit the sidelink transmission in the different periodicity according to the at least one of the plurality of SPS configurations. The BS includes a controller configured to select at least one SPS configuration among a plurality of SPS configurations for a UE. Each of the SPS configurations configures the UE with a different periodicity of a sidelink transmission to be transmitted to another UE. The BS also includes a transmitter configured to transmit the selected at least one SPS configuration to the UE.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit communications on a primary component carrier and a secondary component carrier (SCC). The UE may refrain from transmission on the SCC based at least in part on an error rate for transmission on the SCC and an amount of transmission power headroom for the UE. Numerous other aspects are provided.

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.