A method for cellular network operation includes establishing a transport network communication link in a cellular network between first and second infrastructure cellular entities. A first transport link control function is established within the first infrastructure cellular entity, and a pair transport link control function is established within the second infrastructure cellular entity. Data packets are transmitted through the first and second transport link control functions on the transport network communication link while allocating sequence numbers by the first transport link control function to the transmitted data packets. The pair transport link control function detects, based on the sequence numbers, a loss of a data packet transmitted by the first transport link control function and transmits a status report to the first transport link control function. The forwarding of user traffic from the first infrastructure cellular entity to the second infrastructure cellular entity is controlled responsively to the reports.

A distributed radio frequency communication system facilitates communication between wireless terminals and a core network. The system includes a group of remote radio units (RRUs). Each RRU of the group of RRUs is coupled to an antenna to communicate with at least some of the mobile terminals and includes electronic circuitry to perform at least a first portion of a first-level protocol of a radio access network (RAN) and communicate over a fronthaul link. The system also includes a baseband unit (BBU) coupled to the core network and the fronthaul link, and communicably coupled to the group of RRUs over the fronthaul link. The BBU includes electronic circuitry to assign one or more RRUs, selected from the group of RRUs, to a cluster of RRUs based on one or more parameters, and to perform at least a second-level protocol of the RAN.

A communication system comprising a first base station that includes a first controller and a second base station that includes a second controller, wherein the first controller is configured to transmit a handover request to the second base station in a case where handover of a user terminal to the second base station is required, the second controller is configured to transmit a handover response to the first base station in response to reception of the handover request, the handover response including a renewable energy use rate of the second base station, and the first controller is configured to transmit a handover command to the user terminal in response to reception of the handover response, the handover command including the renewable energy use rate or a data transmission control command according to the renewable energy use rate.

A method, performed by a first distributed unit (DU), of performing communication in a wireless communication system, includes obtaining inter-DU interface configuration information for connection to a second DU; performing the connection to the second DU based on the inter-DU interface configuration information; obtaining information about a throughput of data of at least one radio unit (RU) connected to the first DU based on information about the at least one RU connected to the first DU; selecting at least one target RU based on the information about the throughput of data of the at least one RU; and performing migration of the at least one target RU from the first DU to the second DU.

The present application relates to the field of wireless communications and provides an information transmission method and a device thereof. In the present application, a source IAB donor centralized unit (CU) of an IAB node receives first candidate cell identifiers from the IAB node or first candidate cell identifiers from a target IAB donor CU of the IAB node, the first candidate cell identifiers being allocated for the IAB node migrating to the target IAB donor CU, and the first candidate cell identifiers including candidate cell identifiers of a sub node of the JAB node and/or a terminal connected to the IAB node; and the source IAB donor CU sends a second candidate cell identifier to the sub node of the IAB node and/or the terminal connected to the IAB node, the second candidate cell identifier including at least one of the first candidate cell identifiers.

This application provides a mobility management method and a communication apparatus. The method includes: A first DU receives a first measurement result reported by a terminal device, determines, based on the first measurement result, target beam information for the terminal device to perform mobility management and/or a target cell corresponding to the target beam information, notifies a CU of the target beam information and/or the target cell, and requests, through the CU, a second DU to confirm whether to accept the target beam information and/or the target cell. The first measurement result includes measurement results corresponding to a current serving cell of the terminal device and at least one non-serving cell of the terminal device.

Because of the line-of-sight character of optical wireless communication and a limited field-of-view of optical receivers, the coverage of an access point and the overlapping coverage area of adjacent access points in an optical system are smaller as compared to a RF system. It turns more challenging to support an end point (110) to roam securely in an optical multi-cell wireless communication network. To speed up the derivation of a new pairwise transient key with a new access point during a handover procedure, the end point of this invention comprises a controller (118) that is configured to act as a second supplicant (1181), on behalf of a first supplicant (1186) comprised in a host processor (1185), to communicate with an authenticator to establish a new pairwise transient key for the end point (110) and a candidate access point, and an active pairwise transient key with the currently associated access point is used to secure the communication for new key derivation.

Aspects described herein relate to receiving, by a mobile termination (MT) function of an integrated access and backhaul (IAB) node, a first indication to migrate from a first IAB donor node associated with a first cell group and a first central unit (CU) to a second IAB donor node associated with a second cell group and a second CU, performing, by the IAB node and based at least in part on receiving the first indication, a first random access procedure to connect to the second cell group associated with the second IAB donor node, establishing, by the IAB node in addition to a first distributed unit (DU) function of the IAB node that serves a third cell group and based on performing the first random access procedure, a second DU function that serves a fourth cell group.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine to switch from a first cell of a first distributed unit (DU) to a second cell of a second DU, wherein the first DU and the second DU are included in a set of DUs of a central unit (CU). The UE may communicate, using layer 1 (L1) or layer 2 (L2) signaling to change an activation status of at least one cell of the first DU or the second DU. The UE may switch from the first cell to the second cell in connection with the change to the activation status of the at least one cell of the first DU or the second DU. Numerous other aspects are provided.

There is provided a method, apparatus, and computer program for causing a centralized unit of a second access point to perform: signalling, to a first distributed unit of a first access point configured to provide a serving cell to a user equipment, a plurality of power control parameters associated with a target cell and a reconfiguration instruction for configuring the user equipment to report uplink measurements with an indication of whether a maximum permissible exposure event has occurred.