CN-115460719-B - Radio resource control connection procedure for remote wireless devices

Abstract

The present disclosure relates to a radio resource control connection procedure for a remote wireless device. And in particular to a method comprising receiving, by a relay wireless device, a respective radio resource control, RRC, connection request from a plurality of remote wireless devices, and relaying, between a cellular base station and each of the plurality of remote wireless devices, an RRC message to establish an RRC connection with the cellular base station, the RRC message including a respective RRC setup complete message, wherein each RRC setup complete message is relayed between the respective one of the plurality of remote wireless devices and the cellular base station on a Uu link between the relay wireless device and the cellular base station and transmitted on the Uu link with a respective remote wireless device identifier to distinguish between respective RRC setup complete messages of different remote wireless devices.

Inventors

• XU FANGLI
• S. R. kdali
• ZHANG DAWEI
• HU HAIJING
• CHEN YUQIN
• XING LONGDA
• S. Nimmara
• S A lovelle
• S. Gurumels
• M. A. shikari

Assignees

• 苹果公司

Dates

Publication Date

20260512

Application Date

20190813

Claims (20)

1. 1. A method for wireless communication, comprising: By the relay wireless device: receiving respective radio resource control, RRC, connection requests from a plurality of remote wireless devices, and Relaying an RRC message between a cellular base station and each of the plurality of remote wireless devices to establish an RRC connection with the cellular base station, the RRC message including a corresponding RRC setup complete message, Wherein each RRC setup complete message is relayed between a respective one of the plurality of remote wireless devices and the cellular base station on a Uu link between the relay wireless device and the cellular base station and transmitted along with a respective remote wireless device identifier on the Uu link to distinguish between respective RRC setup complete messages of different remote wireless devices.
2. 2. The method of claim 1, further comprising: transmitting a discovery broadcast message indicating that the relay wireless device supports relay RRC messages; Wherein receiving an RRC connection request from the plurality of remote wireless devices is based at least in part on responding to the discovery broadcast message.
3. 3. The method of claim 1, further comprising: Detecting a link failure of a radio link between the relay wireless device and the cellular base station, and Providing an indication of link failure of a wireless link between the relay wireless device and the cellular base station to the plurality of remote wireless devices.
4. 4. A method according to claim 3, wherein the indication of link failure of the wireless link between the relay wireless device and the cellular base station comprises one or more of: An indication that a link failure of a wireless link between the relay wireless device and the cellular base station has occurred; An indication to suspend a wireless link between the relay wireless device and at least one of the plurality of remote wireless devices, or Releasing an indication of a wireless link between the relay wireless device and the at least one of the plurality of remote wireless devices.
5. 5. A method according to claim 3, further comprising: Based at least in part on a link failure of a wireless link between the relay wireless device and the cellular base station, transmission of a discovery broadcast message to a remote wireless device is stopped.
6. 6. The method of claim 1, further comprising: Detecting a link failure of a wireless link between the relay wireless device and a first remote wireless device of the plurality of remote wireless devices, and An indication of a link failure of a wireless link between the relay wireless device and the first remote wireless device is provided to the cellular base station.
7. 7. The method of claim 6, further comprising: an indication to release the first remote wireless device from the cellular base station is received in response to an indication of a link failure of a wireless link between the relay wireless device and the first remote wireless device.
8. 8. An apparatus for wireless communication, comprising: a processor configured to cause a relay wireless device to: receiving respective radio resource control, RRC, connection requests from a plurality of remote wireless devices, and Relaying an RRC message between a cellular base station and each of the plurality of remote wireless devices to establish an RRC connection with the cellular base station, the RRC message including a corresponding RRC setup complete message, Wherein each RRC setup complete message is relayed between a respective one of the plurality of remote wireless devices and the cellular base station on a Uu link between the relay wireless device and the cellular base station and transmitted along with a respective remote wireless device identifier on the Uu link to distinguish between respective RRC setup complete messages of different remote wireless devices.
9. 9. The apparatus of claim 8, wherein the processor is further configured to cause the relay wireless device to: transmitting a discovery broadcast message indicating that the relay wireless device supports relay RRC messages; Wherein receiving an RRC connection request from the plurality of remote wireless devices is based at least in part on responding to the discovery broadcast message.
10. 10. The apparatus of claim 8, wherein the processor is further configured to cause the relay wireless device to: Detecting a link failure of a radio link between the relay wireless device and the cellular base station, and Providing an indication of link failure for a wireless link between the relay wireless device and the cellular base station to the plurality of remote wireless devices.
11. 11. The apparatus of claim 10, wherein the indication of link failure of the wireless link between the relay wireless device and the cellular base station comprises one or more of: An indication that a link failure of a wireless link between the relay wireless device and the cellular base station has occurred; An indication to suspend a wireless link between the relay wireless device and at least one of the plurality of remote wireless devices, or Releasing an indication of a wireless link between the relay wireless device and the at least one of the plurality of remote wireless devices.
12. 12. The apparatus of claim 10, wherein the processor is further configured to cause the relay wireless device to: based at least in part on a link failure of a wireless link between the relay wireless device and the cellular base station, transmission of a discovery broadcast message to a remote wireless device is stopped.
13. 13. The apparatus of claim 8, wherein the processor is further configured to cause the relay wireless device to: Detecting a link failure of a wireless link between the relay wireless device and a first remote wireless device of the plurality of remote wireless devices, and An indication of a link failure of a wireless link between the relay wireless device and the first remote wireless device is provided to the cellular base station.
14. 14. The apparatus of claim 13, wherein the processor is further configured to cause the relay wireless device to: an indication to release the first remote wireless device from the cellular base station is received in response to an indication of a link failure of a wireless link between the relay wireless device and the first remote wireless device.
15. 15. A relay wireless device, comprising: Radio component, and One or more processors operatively coupled to the radio, wherein the one or more processors are configured to cause the relay wireless device to: a plurality of radio resource control messages are relayed between the cellular base station and each of the plurality of remote wireless devices, Wherein each radio resource control message is relayed between a respective one of the plurality of remote wireless devices and the cellular base station on a Uu link between the relay wireless device and the cellular base station and transmitted on the Uu link with a respective remote wireless device identifier to distinguish between respective radio resource control messages of different remote wireless devices.
16. 16. The relay wireless device of claim 15, wherein the one or more processors are further configured to cause the relay wireless device to: transmitting a discovery broadcast message indicating that the relay wireless device supports relay RRC messages; wherein the plurality of radio resource control messages are relayed between the cellular base station and each of the plurality of remote wireless devices based at least in part on responding to the discovery broadcast message.
17. 17. The relay wireless device of claim 15, wherein the one or more processors are further configured to cause the relay wireless device to: Detecting a link failure of a radio link between the relay wireless device and the cellular base station, and Providing an indication of link failure of a wireless link between the relay wireless device and the cellular base station to the plurality of remote wireless devices.
18. 18. The relay wireless device of claim 17, wherein the indication of link failure of the wireless link between the relay wireless device and the cellular base station comprises one or more of: An indication that a link failure of a wireless link between the relay wireless device and the cellular base station has occurred; An indication to suspend a wireless link between the relay wireless device and at least one of the plurality of remote wireless devices, or Releasing an indication of a wireless link between the relay wireless device and the at least one of the plurality of remote wireless devices.
19. 19. The relay wireless device of claim 17, wherein the one or more processors are further configured to cause the relay wireless device to: based at least in part on a link failure of a wireless link between the relay wireless device and the cellular base station, ceasing transmission of the discovery broadcast message to the remote wireless device.
20. 20. The relay wireless device of claim 15, wherein the one or more processors are further configured to cause the relay wireless device to: Detecting a link failure of a wireless link between the relay wireless device and a first remote wireless device of the plurality of remote wireless devices, and An indication of a link failure of a wireless link between the relay wireless device and the first remote wireless device is provided to the cellular base station.

Description

Radio resource control connection procedure for remote wireless devices The application is a divisional application of an application patent application with the application date of 2019, 8, 13, the application number of 201910746189.1 and the name of radio resource control connection procedure of remote wireless equipment. Technical Field The present application relates to wireless communications, including radio resource control connection procedures involving remote wireless devices in a wireless communication system. Background The use of wireless communication systems is growing rapidly. In addition, wireless communication technologies have evolved from voice-only communication to transmission that also includes data (such as the internet and multimedia content). The mobile electronic device may take the form of a smart phone or tablet computer that is typically carried by a user. Wearable devices (also referred to as accessory devices) are a newer form of mobile electronic device, one example being a smart watch. In addition, low cost, low complexity wireless devices intended for static or dynamic deployment are also rapidly increasing as part of developing "internet of things". In other words, the complexity, capabilities, flow patterns and other characteristics of the required equipment are becoming more and more extensive. In general, it would be desirable to recognize and provide improved support for a wide range of desirable wireless communication characteristics. Accordingly, improvements in the art are desired. Disclosure of Invention Embodiments of systems, apparatuses, and methods for performing a radio resource control connection procedure, particularly for a remote wireless device in a wireless communication system, are presented herein. As mentioned above, the number of use cases with widely varying capabilities and using the desired heterogeneous wireless devices is increasing. One direction in which the expansion of possible use cases supported by wireless communication technology may include toward low cost and/or low power consumption wireless devices. The utility of such low cost and/or low power wireless devices may be increased by the ability of the intermediate relay wireless device to support the establishment of radio resource control connections by such wireless devices and gain access to the cellular network. Accordingly, techniques described herein include techniques for a remote wireless device providing an RRC message to a relay wireless device that relays to a cellular base station, a cellular base station providing an RRC message to a relay wireless device that relays to a remote wireless device, and a relay wireless device relaying such messages between the cellular base station and the remote wireless device. In addition, the techniques described herein include techniques for detecting link failure and link failure processing in conjunction with remote radio resource control connections, both for wireless links between remote wireless devices and relay wireless devices, as well as for wireless links between relay wireless devices and cellular base stations. The techniques described herein may be implemented and/or used in several different types of devices including, but not limited to, cellular telephones, tablet computers, accessory and/or wearable computing devices, portable media players, cellular base stations and other cellular network infrastructure devices, servers, and any of a variety of other computing devices. This summary is intended to provide a brief overview of some of the subject matter described in this document. Accordingly, it should be understood that the above features are merely examples and should not be construed as narrowing the scope or spirit of the subject matter described herein in any way. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, the accompanying drawings, and the claims. Drawings A better understanding of the present subject matter may be obtained when the following detailed description of the embodiments is considered in conjunction with the following drawings. FIG. 1 illustrates an exemplary wireless communication system including an accessory device, in accordance with some embodiments; Fig. 2 illustrates an exemplary wireless communication system in which two wireless devices are capable of performing direct device-to-device communication, in accordance with some embodiments; Fig. 3 is a block diagram illustrating an exemplary wireless device according to some embodiments; Fig. 4 is a block diagram illustrating an exemplary base station according to some embodiments; fig. 5 is a communication flow diagram illustrating an exemplary method for performing presence discovery in a wireless communication system in accordance with some embodiments; fig. 6 illustrates aspects of possible wireless communication relay between a remote UE, a relay