US-12621826-B2 - Communication method and apparatus to enable a network device to support communication of a new type of terminal device without additionally sending a set of complete system information

US12621826B2US 12621826 B2US12621826 B2US 12621826B2US-12621826-B2

Abstract

A communication method and apparatus relate to the field of communication technologies, to enable a network device to support communication of a new type of terminal device without additionally sending a set of complete system information. The method includes: The network device sends a SIB1 and supplementary information. Maximum transmission bandwidth of a first terminal device is different from that of a second terminal device. The supplementary information includes first information and/or second information, the SIB1 does not include the first information, and a parameter value of the second information included in the supplementary information is different from a parameter value of the second information included in the SIB1. After receiving the SIB1 and the supplementary information, the second terminal device accesses a network based on partial information other than the second information in the SIB1 and the supplementary information. Consumed resources for downlink transmission can be reduced.

Inventors

Yongqiang FEI
Juan Zheng
Hailong HOU
Chaojun Li

Assignees

HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20220629

Claims (15)

1 . A communication method, wherein the method comprises: sending a system information block (SIB1), wherein the SIB1 comprises access configuration information of a first terminal device, and/or scheduling information of another system information block; and sending supplementary information using the SIB1, wherein the supplementary information is used to indicate access of a second terminal device, wherein a maximum transmission bandwidth of the first terminal device is different from a maximum transmission bandwidth of the second terminal device, wherein the second terminal device is an internet of things terminal, a machine type communication terminal, or a capability-reduced terminal, and wherein the supplementary information comprises at least one of first information and second information, the SIB1 does not comprise the first information, a parameter value of the second information comprised in the supplementary information is different from a parameter value corresponding to the second information in the SIB1, and the first terminal device ignores the parameter value of the second information in the supplementary information.
2 . The method according to claim 1 , wherein the supplementary information further comprises first indication information, and the first indication information is used to indicate to the second terminal device not to use third information in the SIB1.
3 . The method according to claim 1 , wherein the supplementary information further comprises second indication information, and the second indication information is used to indicate to the second terminal device to use fourth information in the SIB1.
4 . The method according to claim 1 , wherein the second information comprises random access configuration information of the second terminal device, and/or the second information comprises scheduling information of another system information block of the second terminal device.
5 . The method according to claim 1 , wherein the first information comprises time domain resource indication information, the time domain resource indication information is used to indicate a valid time domain resource for receiving and/or sending information by the second terminal device, and the valid time domain resource is a subset of time domain resources for receiving or sending information by the first terminal device.
6 . The method according to claim 1 , wherein a transmission resource for the supplementary information is determined using at least one of the following methods: the transmission resource for the supplementary information is predefined; and the transmission resource for the supplementary information is scheduled using first resource indication information, a transmission resource for the SIB1 is scheduled using second resource indication information, and the first resource indication information and the second resource indication information are carried in first downlink control information; or the transmission resource for the supplementary information is scheduled using first resource indication information, a transmission resource for the SIB1 is scheduled using second resource indication information, the first resource indication information is carried in first downlink control information, and the second resource indication information is carried in second downlink control information.
7 . A communication method, wherein the method is applied in a second terminal device, wherein the second terminal device is an internet of things terminal, a machine type communication terminal, or a capability-reduced terminal, and the method comprises: receiving a system information block (SIB1), wherein the SIB1 comprises access configuration information of a first terminal device, and/or scheduling information of another system information block; receiving supplementary information sent using the SIB1, wherein the supplementary information is used to indicate access of the second terminal device, wherein a maximum transmission bandwidth of the first terminal device is different from a maximum transmission bandwidth of the second terminal device, wherein the supplementary information comprises at least one of first information and second information, the SIB1 does not comprise the first information, a parameter value of the second information comprised in the supplementary information is different from a parameter value corresponding to the second information in the SIB1, and the first terminal device ignores the parameter value of the second information in the supplementary information; and accessing a network based on the SIB1 and the supplementary information.
8 . The method according to claim 7 , wherein the supplementary information further comprises first indication information, and the first indication information is used to indicate to the second terminal device not to use third information in the SIB1.
9 . The method according to claim 7 , wherein the supplementary information further comprises second indication information, and the second indication information is used to indicate to the second terminal device to use fourth information in the SIB1.
10 . The method according to claim 7 , wherein the second information comprises random access configuration information of the second terminal device, and/or the second information comprises scheduling information of another system information block of the second terminal device.
11 . The method according to claim 7 , wherein the first information comprises time domain resource indication information, the time domain resource indication information is used to indicate a valid time domain resource for receiving and/or sending information by the second terminal device, and the valid time domain resource is a subset of time domain resources for receiving or sending information by the first terminal device.
12 . The method according to claim 7 , wherein a transmission resource for the supplementary information is determined using at least one of the following methods: the transmission resource for the supplementary information is predefined; and the transmission resource for the supplementary information is scheduled using first resource indication information, a transmission resource for the SIB1 is scheduled using second resource indication information, and the first resource indication information and the second resource indication information are carried in first downlink control information; or the transmission resource for the supplementary information is scheduled using first resource indication information, a transmission resource for the SIB1 is scheduled using second resource indication information, the first resource indication information is carried in first downlink control information, and the second resource indication information is carried in second downlink control information.
13 . A communication apparatus, comprising a processor and a communication interface, wherein the processor is configured to control operations of the communication interface; and the communication interface is configured to send a system information block (SIB1) and supplementary information using the SIB1, wherein the SIB1 comprises access configuration information of a first terminal device, and/or scheduling information of another system information block; the supplementary information is used to indicate access of a second terminal device, the second terminal device is an internet of things terminal, a machine type communication terminal, or a capability-reduced terminal, and a maximum transmission bandwidth of the first terminal device is different from a maximum transmission bandwidth of the second terminal device; and the supplementary information comprises at least one of first information and second information, the SIB1 does not comprise the first information, a parameter value of the second information comprised in the supplementary information is different from a parameter value corresponding to the second information in the SIB1, and the first terminal device ignores the parameter value of the second information in the supplementary information.
14 . The communication apparatus according to claim 13 , wherein the second information comprises random access configuration information of the second terminal device, and/or the second information comprises scheduling information of another system information block of the second terminal device.
15 . The communication apparatus according to claim 13 , wherein the first information comprises time domain resource indication information, the time domain resource indication information is used to indicate a valid time domain resource for receiving and/or sending information by the second terminal device, and the valid time domain resource is a subset of time domain resources for receiving or sending information by the first terminal device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2019/130432, filed on Dec. 31, 2019, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus. BACKGROUND In new radio (NR), a base station broadcasts a system information block 1 (SIB1). The SIB1 includes system information required for accessing a network. Therefore, terminal devices such as a smartphone and a tablet computer may receive the SIB1, and access the network based on the system information in the SIB1, to implement communication between the terminal devices and the base station. However, for a new type of terminal device such as a machine type communication (MTC) terminal or an internet of things (IoT) device, system information required by the new type of terminal device to access the network may be different from system information required by the terminal device such as the smartphone. In this case, the new type of terminal device cannot access the network based on the SIB1. As a result, communication of the new type of terminal device is not supported in NR currently. SUMMARY The present disclosure provides a communication method and apparatus, to enable a network device to indicate communication of a new type of terminal device (such as an MTC terminal, an IoT device, or a capability-reduced terminal) without additionally sending a set of complete system information, thereby improving resource utilization of a communication system. According to a first aspect, an embodiment provides a communication method, specifically including: A network device sends a SIB1 and supplementary information. The SIB1 includes access configuration information of a first terminal device, and/or scheduling information of another system information block. The supplementary information is used to indicate access of a second terminal device, and maximum transmission bandwidth of the first terminal device is different from that of the second terminal device. The supplementary information includes at least one of first information and second information, the SIB1 does not include the first information, and a parameter value of the second information included in the supplementary information is different from a parameter value corresponding to the second information in the SIB1. After receiving the SIB1 and the supplementary information, the second terminal device accesses a network based on the SIB1 and the supplementary information. In this embodiment, the network device sends the SIB1 and the supplementary information, so that the second terminal device can access the network based on the SIB1 and the supplementary information, and the network device can support the second terminal device without affecting supporting communication of the first terminal device. In addition, the supplementary information may not include information that is to be used by the second terminal device and that is included in the SIB1. Therefore, compared with sending a complete and new SIB1, this method helps reduce downlink resource overheads. It should be noted that the first information or the second information may be understood as information that needs to be used by the second terminal device and that is not included in the SIB1, or information that needs to be used by the second terminal device and that is different from the information included in the SIB1. In an embodiment, the supplementary information further includes first indication information, and the first indication information is used to indicate the second terminal device not to use third information in the SIB1. In this case, for example, the second terminal device accesses the network based on partial information other than the second information and the third information in the SIB1 and the supplementary information. The supplementary information includes the first indication information, so that the second terminal device can conveniently determine information that is to be used and that is in the SIB1. In an embodiment, the supplementary information further includes second indication information, and the second indication information is used to indicate the second terminal device to use fourth information in the SIB1. In this case, for example, the second terminal device accesses the network based on the fourth information in the SIB1 and the supplementary information. The supplementary information includes the second indication information, so that the second terminal device can conveniently determine information that is to be used and that is in the SIB1. In an embodiment, the second information includes random access configuration information of the second terminal device, and/or the second information includes scheduling information of another system information block of the se