Embodiments of the present disclosure provide a service indication method, a base station, a terminal, and a system. The method includes: sending, by the base station, first service indication information to the terminal, where the first service indication information includes an identifier of a first frequency channel number and an identifier of a first service associated with the first frequency channel number; determining, by the base station, a second service associated with a second frequency channel number; and sending second service indication information to the terminal, where the second service indication information includes the identifier of the first frequency channel number and an identifier of the second service. In the solution in the embodiments of the present disclosure, after indicating a service associated with a frequency channel number, a service identifier may further indicate a service associated with another frequency channel number with a same physical frequency.

A core network device selection method and apparatus are disclosed. The method includes: receiving, by an access network node, an access stratum message sent by a terminal, where the access stratum message includes a NAS request message and a network selection auxiliary parameter; querying configuration information based on the network selection auxiliary parameter, and determining a group identifier of at least one mobility management device group, where the configuration information includes a correspondence between a network selection auxiliary parameter and a group identifier of a mobility management device group; determining a device identifier of a target mobility management device based on the group identifier of the at least one mobility management device group; and sending the NAS request message to a mobility management device indicated by the device identifier of the target mobility management device.

A core network device selection method and apparatus are disclosed. The method includes: receiving, by an access network node, an access stratum message sent by a terminal, where the access stratum message includes a NAS request message and a network selection auxiliary parameter; querying configuration information based on the network selection auxiliary parameter, and determining a group identifier of at least one mobility management device group, where the configuration information includes a correspondence between a network selection auxiliary parameter and a group identifier of a mobility management device group; determining a device identifier of a target mobility management device based on the group identifier of the at least one mobility management device group; and sending the NAS request message to a mobility management device indicated by the device identifier of the target mobility management device.

This application provides an information transmission method and a communication apparatus. The method includes: A first device sends TWT resource configuration information in a first BSS to a second device. The first device is located in the first BSS, the second device is located in a second BSS, and the first BSS and the second BSS at least partially overlap. According to the information transmission method provided in this application, TWT resource configuration information in a plurality of BSSs is shared among the plurality of BSSs in an OBSS scenario. Therefore, collision can be further avoided during data transmission in different BSSs in the OBSS scenario, thereby improving quality and assurance of data transmission between devices in the plurality of BSSs, and improving efficiency of data transmission in the OBSS scenario.

This application provides an information transmission method and a communication apparatus. The method includes: A first device sends TWT resource configuration information in a first BSS to a second device. The first device is located in the first BSS, the second device is located in a second BSS, and the first BSS and the second BSS at least partially overlap. According to the information transmission method provided in this application, TWT resource configuration information in a plurality of BSSs is shared among the plurality of BSSs in an OBSS scenario. Therefore, collision can be further avoided during data transmission in different BSSs in the OBSS scenario, thereby improving quality and assurance of data transmission between devices in the plurality of BSSs, and improving efficiency of data transmission in the OBSS scenario.

Techniques for improved spatial reuse for wireless local area network (WLAN) networks are described. An access point (AP) may win a contention to a wireless medium and obtain a transmission opportunity (TXOP). The AP may perform a procedure to identify a group of un-managed APs for participation in spatial reuse opportunities for synchronous transmission over the TXOP. The AP may perform the procedure using over-the-air signaling. The AP may transmit a spatial reuse (SR) poll frame to one or more un-managed APs of the network, either sequentially or as part of a multiple-AP procedure. The AP may receive an SR response frame, or directly measure potential interference of a station (STA) serviced by one or more un-managed APs, and select a group of APs for coordinated reuse over the TXOP. The AP may select the group of APs based on one or more criteria for coordinated reuse.

Techniques for improved spatial reuse for wireless local area network (WLAN) networks are described. An access point (AP) may win a contention to a wireless medium and obtain a transmission opportunity (TXOP). The AP may perform a procedure to identify a group of un-managed APs for participation in spatial reuse opportunities for synchronous transmission over the TXOP. The AP may perform the procedure using over-the-air signaling. The AP may transmit a spatial reuse (SR) poll frame to one or more un-managed APs of the network, either sequentially or as part of a multiple-AP procedure. The AP may receive an SR response frame, or directly measure potential interference of a station (STA) serviced by one or more un-managed APs, and select a group of APs for coordinated reuse over the TXOP. The AP may select the group of APs based on one or more criteria for coordinated reuse.

This disclosure is directed to a method in a cellular telecommunications network, and a device for implementing the method, in which one or more network nodes are configured to implement a plurality of network slices, the method including identifying requirement data indicating a network requirement for one or more metrics for a User Equipment, UE, to access a service of a service provider; identifying network slice capability data for a first and second network slice, the network slice capability data for the first network slice indicating the first network slice's capability for the one or more metrics and the network slice capability data for the second network slice indicating the second network slice's capability for the one or more metrics; comparing the requirement data to at least one of the network slice capability data for the first network slice and the network slice capability data for the second network slice; determining that the UE should access the service using the first network slice based on the comparison; and initiating a connection of the UE to the first network slice.

This disclosure is directed to a method in a cellular telecommunications network, and a device for implementing the method, in which one or more network nodes are configured to implement a plurality of network slices, the method including identifying requirement data indicating a network requirement for one or more metrics for a User Equipment, UE, to access a service of a service provider; identifying network slice capability data for a first and second network slice, the network slice capability data for the first network slice indicating the first network slice's capability for the one or more metrics and the network slice capability data for the second network slice indicating the second network slice's capability for the one or more metrics; comparing the requirement data to at least one of the network slice capability data for the first network slice and the network slice capability data for the second network slice; determining that the UE should access the service using the first network slice based on the comparison; and initiating a connection of the UE to the first network slice.

The present disclosure provides a pilot mapping method, a pilot signal transmission method and apparatus, a base station and a terminal. In each PRB of one PRB group, the positions at which a pilot of each antenna port is mapped to resource elements (RE) in the PRB is determined according to an antenna port index and an index of the PRB in the PRB group or the whole system bandwidth, so that support is provided for implementation of power borrowing, so as to make full use of transmit power of a base station end, improve the coverage range of the pilot signal and channel estimation quality of a reception end.