This application provides for a data transmission method, an apparatus, and a device. The method may be applied to a relay communication system. The method includes a first network device that receives a first data packet. The first data packet is a data packet of a first multimedia broadcast multicast service (MBMS), and the first data packet carries first information. When second information of the first network device matches the first information, the first network device sends the first data packet to a terminal device that accesses the first network device. The second information is preconfigured for the first network device. In this way, the MBMS is transmitted in the relay communication system.

This application provides for a data transmission method, an apparatus, and a device. The method may be applied to a relay communication system. The method includes a first network device that receives a first data packet. The first data packet is a data packet of a first multimedia broadcast multicast service (MBMS), and the first data packet carries first information. When second information of the first network device matches the first information, the first network device sends the first data packet to a terminal device that accesses the first network device. The second information is preconfigured for the first network device. In this way, the MBMS is transmitted in the relay communication system.

A method for UE route selection policy (URSP) rule matching enhancement is proposed. When an application is executed, the upper layer of a UE sends the application information to URSP entity for matching a URSP rule. The UE finds an RSD of the matching URSP rule, and the UE tries to reuse an existing PDU session, e.g., the association of the application with the existing PDU session have certain exceptions. In one example, regarding DNN, S-NSSAI, SSC mode, and PDU session type, the above listed parameters in the RSD can either match with stored PDU session parameters of the existing PDU session or match with PDU session parameters requested by the UE during the PDU session establishment procedure.

Systems and methods for fronthaul optimization using software defined networking are provided. In one example, a method includes receiving time period information and destination information for a time period from one or more base station entities (BSEs), each BSE configured to implement some functions for layer(s) of a wireless interface used to communicate with UEs. The method further includes determining a configuration of Ethernet switch(es) based on the destination information for the time period and topology information for the Ethernet switch(es). The Ethernet switch(es) are communicatively coupled to the BSE(s) and configured to: receive downlink fronthaul data from the BSE(s), be communicatively coupled to one or more RUs, and forward downlink fronthaul data from the one or more base station entities to the one or more RUs. The method further includes transmitting update(s) for forwarding rules to the Ethernet switch(es) based on the determined configuration for the Ethernet switch(es).

Systems and methods for fronthaul optimization using software defined networking are provided. In one example, a method includes receiving time period information and destination information for a time period from one or more base station entities (BSEs), each BSE configured to implement some functions for layer(s) of a wireless interface used to communicate with UEs. The method further includes determining a configuration of Ethernet switch(es) based on the destination information for the time period and topology information for the Ethernet switch(es). The Ethernet switch(es) are communicatively coupled to the BSE(s) and configured to: receive downlink fronthaul data from the BSE(s), be communicatively coupled to one or more RUs, and forward downlink fronthaul data from the one or more base station entities to the one or more RUs. The method further includes transmitting update(s) for forwarding rules to the Ethernet switch(es) based on the determined configuration for the Ethernet switch(es).

A communication device is provided that makes a single or a plurality of functions desired by a service user act on a packet desired by the service user in a service for transferring a packet in a network. A communication device is provided that includes a communication unit that communicates with another node and a control unit that controls the communication by the communication unit, in which the control unit generates path information with a target node, and in the path information with the target node, at least information regarding communication with at least a single relay node that exists between the communication device and the target node, information regarding a function to be performed by the relay node, and content of processing according to the function execution result by the relay node are written.

A communication device is provided that makes a single or a plurality of functions desired by a service user act on a packet desired by the service user in a service for transferring a packet in a network. A communication device is provided that includes a communication unit that communicates with another node and a control unit that controls the communication by the communication unit, in which the control unit generates path information with a target node, and in the path information with the target node, at least information regarding communication with at least a single relay node that exists between the communication device and the target node, information regarding a function to be performed by the relay node, and content of processing according to the function execution result by the relay node are written.

A method (100) of route selection in a wireless communication system and a control system (40) is provided. The method includes selecting a route between a first node (1) and a second node (2) and comprises: —evaluating (110) a plurality of possible routes (R1, R2, R3, R4), at least one route (R2, R3, R4) including a third node (3, 4) between the first and the second node; and —selecting (160) the route that has the lowest latency among the possible routes. Especially the method (100) includes: —selecting (120) parameter settings for each link of the possible routes, said selecting (120) comprising; —selecting (130) the length of the cyclic prefix, —evaluating (140) combinations of the selected cyclic prefix and different settings of the at least one further parameter of the physical layer; —selecting (150) the parameter settings that has lowest estimated latency and fulfils at least one communication quality criterion.

A method (100) of route selection in a wireless communication system and a control system (40) is provided. The method includes selecting a route between a first node (1) and a second node (2) and comprises: —evaluating (110) a plurality of possible routes (R1, R2, R3, R4), at least one route (R2, R3, R4) including a third node (3, 4) between the first and the second node; and —selecting (160) the route that has the lowest latency among the possible routes. Especially the method (100) includes: —selecting (120) parameter settings for each link of the possible routes, said selecting (120) comprising; —selecting (130) the length of the cyclic prefix, —evaluating (140) combinations of the selected cyclic prefix and different settings of the at least one further parameter of the physical layer; —selecting (150) the parameter settings that has lowest estimated latency and fulfils at least one communication quality criterion.

A method and system for protocol data unit (PDU) session release due to violation of time or location information element constraints is provided. Operations may be part of optimizing operation of a user equipment (UE) in a wireless communications network. A policy control function (PCF) determines whether there is a violation of at least one of location information and time information associated with a background data transfer. Upon detecting such a violation, the PCF requests a session management function (SMF) to release a PDU session associated with the background data transfer. The SMF responds by releasing the PDU session.