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PDCP count handling in RRC connection resume

專利號
US11212680B2
公開日期
2021-12-28
申請人
Nokia Technologies Oy（FI Espoo）
發(fā)明人
Henri Koskinen
IPC分類
H04W4/00; H04W12/106; H04W76/27; H04W76/19; H04W80/02; H04W36/00
技術(shù)領(lǐng)域
pdcp,rrc,resume,station,ue,may,connection,hfn,or,base
地域： Espoo

摘要

Methods and apparatus, including computer program products, are provided for resuming connections. In some example embodiments, there may be provided a method that includes receiving, at a user equipment, a radio resource control connection resume message; verifying, at the user equipment, an integrity of the received radio resource control connection resume message, wherein the user equipment verifies the integrity based on a predetermined value of a packet data convergence protocol hyper frame number; and resuming, by the user equipment, use of a suspended radio resource control connection, when the integrity verification of the received radio resource connection resume message is passed successfully. Related systems, methods, and articles of manufacture are also described.

說明書

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of U.S. Provisional Patent Application No. 62/394,057 which is entitled “PDCP COUNT HANDLING IN RRC CONNECTION RESUME,” and filed on Sep. 13, 2016, 2016, the disclosure of which is incorporated herein by reference for all purposes.

FIELD

The subject matter described herein relates wireless.

BACKGROUND

User equipment (UE), such as a smartphone, a cell phone, an Internet of Things (IoT) device, and/or other type of wireless apparatus accessing a radio access network including a base station, may suspend a connection, and then resume the connection at a later time. For example, a radio resource control (RRC) connection may be suspended between the UE and base station. When this is the case, some of the communications, such as user plane traffic between the user equipment and the base station, may be suspended. However, the UE and the base station may maintain the context of the connection, so that the UE and base station can quickly resume the RRC connection using the prior context, without having to create an entirely new RRC connection. The context may include the radio bearer configuration information, security parameters, cell identifiers, physical layer configuration information, measurement and reporting configuration information, and/or the like. Examples of connection suspension and resume of RRC connections can be found in TS 36.331. See, e.g., 3GPP TS 36.331 V13.2.0 (2016-06), 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification, Release 13.

SUMMARY

權(quán)利要求

1
What is claimed:1. A method comprising:receiving, at a user equipment, a radio resource control connection resume message;verifying, at the user equipment, an integrity of the received radio resource control connection resume message, wherein the user equipment verifies the integrity based on a predetermined value of a packet data convergence protocol hyper frame number; andresuming, by the user equipment, use of a suspended radio resource control connection, when the integrity verification of the received radio resource connection resume message is passed successfully.2. The method of claim 1, further comprising:transmitting a radio resource control connection resume complete message when resuming use of the suspended connection.3. The method of claim 1, wherein the predetermined value is fixed to enable synchronization between the user equipment and a base station.4. The method of claim 1, wherein the predetermined value includes all bits set to a value of 1 or 0.5. The method of claim 1, wherein the use of the suspended radio resource control connection is resumed when the integrity verification of the received radio resource connection resume message is passed successfully.6. The method of claim 1, wherein the base station is different than a base station where the user equipment suspended the radio resource control connection.7. An apparatus comprising:at least one processor; andat least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to at least:receive a radio resource control connection resume message;verify an integrity of the received radio resource control connection resume message, wherein the apparatus verifies the integrity based on a predetermined value of a packet data convergence protocol hyper frame number; andresume use of a suspended radio resource control connection, when the integrity verification of the received radio resource connection resume message is passed successfully.8. The apparatus of claim 7, wherein the apparatus is further configured to at least transmit a radio resource control connection resume complete message when resuming use of the suspended connection.9. The apparatus of claim 7, wherein the predetermined value is fixed to enable synchronization between the apparatus and a base station.10. The apparatus of claim 7, wherein the predetermined value includes all bits set to a value of 1 or 0.11. The apparatus of claim 7, wherein the use of the suspended radio resource control connection is resumed when the integrity verification of the received radio resource connection resume message is passed successfully.12. The apparatus of claim 7, wherein the base station is different than a base station where the apparatus suspended the radio resource control connection.13. The apparatus of claim 7, wherein the apparatus comprises a user equipment.14. An apparatus comprising:at least one processor; andat least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to at least:receive a radio resource control connection resume request message from a user equipment;generate, in response to the received radio resource control connection resume request message, a radio resource control connection resume message;perform integrity protection of the radio resource connection resume message, wherein the integrity protection is performed based on a predetermined value of a packet data convergence protocol hyper frame number; andtransmit to the user equipment the radio resource control connection resume message, wherein the radio resource control connection resume message is integrity protected.15. The apparatus of claim 14, wherein the radio resource control connection resume request message is received to enable resumption of a suspended radio resource control connection.16. The apparatus of claim 14, wherein the apparatus comprises a base station.17. The apparatus of any of claim 16, wherein the predetermined value is fixed to enable synchronization between the user equipment and the base station.18. The apparatus of claim 14, wherein the predetermined value includes all bits set to a value of 1 or 0.19. The apparatus of claim 16, wherein the base station is different than a base station where the user equipment suspended the radio resource control connection.20. A non-transitory computer-readable storage medium including program code which when executed by at least one processor causes operations comprising:receiving, at a user equipment, a radio resource control connection resume message;verifying, at the user equipment, an integrity of the received radio resource control connection resume message, wherein the user equipment verifies the integrity based on a predetermined value of a packet data convergence protocol hyper frame number; andresuming, by the user equipment, use of a suspended radio resource control connection, when the integrity verification of the received radio resource connection resume message is passed successfully.
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