The first circuitry may be operable to establish a first UE Receive (Rx) beam as being for reception of data from a first eNB. The second circuitry may be operable to process a transmission including Downlink Control Information (DCI), wherein the DCI carries an eNB cell-switching indicator. The first circuitry may also be operable to establish a second UE Rx beam as being for reception of data from a second eNB based on the eNB cell-switching indicator.

Methods, systems, and devices for wireless communications are described, in which a base station may determine a load balancing adjustment for traffic communicated through the base station. The load balancing adjustment may be provided at a beam level for one or more beams of a plurality of beams, at a network slice level for one or more network slice IDs of a number of network slice IDs, or combinations thereof. The base station may use the load balancing adjustment to identify one or more updated parameters for triggering a handover of at least one user equipment (UE) between beams or slice IDs of a same cell or different cells. The base station may format a mobility change request that indicates the one or more parameters that are updated, and transmit the mobility change request to another base station to establish parameters for handovers between the base stations.

Methods, systems, and apparatuses are provided for handling User Equipment (UE)-initiated beam change in a wireless communication system, with a method of a UE comprising triggering or initiating a UE-initiated beam switching associated with a Cell, transmitting a beam switching indication associated with the Cell in response to the UE-initiated beam switching, and performing, in response to considering the UE-initiated beam switching to be not successful, or expiration of a timer, at least one of: canceling the triggered UE-initiated beam switching associated with the Cell, and/or canceling a Scheduling Request (SR) associated with the UE-initiated beam switching, and/or stopping a Random Access (RA) procedure associated with the UE-initiated beam switching, and/or triggering a Beam Failure Recovery (BFR) associated with the Cell, and/or retransmitting the beam switching indication, and/or generating and transmitting a second beam switching indication.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to one embodiment, a method for operating a user equipment (UE) in a wireless communication system may comprise receiving an L1/L2 triggered mobility (LTM) medium access control control element (MAC CE) from a base station, determining whether the LTM MAC CE includes a timing advance (TA) value or a random access channel (RACH)-less handover indicator, and when the LTM MAC CE includes the TA value or the RACH-less handover indicator, performing a handover procedure to a target cell based on the TA value or the RACH-less handover indicator.

A communication scheme and a system thereof are provided for converging IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The disclosure can be applied to intelligent services based on the 5G communication technology and the IoT-related technology. The disclosure provides a method of minimizing a handover delay and a handover failure possibility of the terminal in a mobile communication system, which includes receiving a handover command from a first BS; performing DL synchronization with a second BS; determining whether a first UL signal to be transmitted to the first BS and a second UL signal to be transmitted to the second BS overlap; and in response to determining that the first UL signal and the second UL signal overlap, transmitting the second UL signal to the second BS, wihtout transmitting the first UL signal to the first BS.

The present disclosure relates to a method used in a cluster manager controlling a cluster for a terminal device served by a radio node, and to the associated cluster manager. The cluster manager is under control of a control node and the cluster includes the radio node. The method includes: receiving Layer 1 (L1)/Layer 2 (L2) measurements of the terminal device on the radio node and one or more neighboring radio nodes of the radio node; determining a target radio node, to which the terminal device is to be handed over, based on the L1/L2 measurements; determining whether the target radio node is within the cluster; and if it is determined that the target radio node is within the cluster, determining whether the terminal device is to perform handover from a beam of the radio node to a beam of the target radio node.

According to some aspects, a first base station employing a first beamforming codebook may receive a second beamforming codebook from a second base station. The first beamforming codebook may comprise a plurality of beamforming codewords associated with the first base station, and the second beamforming codebook may comprise a plurality of beamforming codewords associated with the second base station. The first base station may receive at least one message from the second base station indicating a subset of the plurality of beamforming codewords associated with the second base station. The first base station may select one or more first beamforming codewords from the first beamforming codebook based on the indicated subset of the plurality of codewords associated with the second base station. The first base station may transmit signals to at least one wireless device employing the one or more first beamforming codewords.

Methods, apparatus, and systems for wireless communications are described. Example methods, devices, and systems are described that utilize a precoding matrix indicator (PMI) computed based at least in part on first signals received via a first cell and on second signals received via a second cell. Information in a measurement information message may be used as part of computing a PMI. The measurement information message may indicate resources of a first cell and a second cell for use in computing the PMI. A wireless device may receive first signals via the first cell and second signals via the second cell based on information in the measurement information message, and may use these signals to compute the PMI. The computed PMI may be used in communications with a base station. For example, the wireless device may receive a packet beamformed employing the computed PMI.

Methods, apparatus, and systems for wireless communications are described. A first base station may be configured to transmit a measurement information message to a wireless device. The measurement information message may comprise at least one information element, wherein the at least one information element indicates one or more first resource blocks corresponding to first signals associated with the first base station and one or more second resource blocks corresponding to second signals associated with a second base station. The wireless device may compute a precoding matrix indicator (PMI) based at least in part on first signals received from the first base station and second signals received from the second base station. The wireless device may transmit channel state information comprising the computed PMI to the first base station. The first base station may transmit at least one data packet beamformed according to a precoding matrix associated with the computed PMI.

Methods, apparatus, and systems for wireless communications are disclosed. A first base station may be configured to receive, from a second base station, one or more messages. The messages may include downlink beamforming information elements for a downlink cell. Each downlink beamforming information element of the plurality of downlink beamforming information elements may be associated with a respective resource block of a plurality of resource blocks in the downlink cell. The first base station may select a first beamforming codeword for at least one resource block of the plurality of resource blocks based on the downlink beamforming information associated with the at least one resource block. The first base station may transmit, to a wireless device, signals on the at least one resource block employing the first beamforming codeword.