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Resume failure handling after cell reselection

A cell reselection and cell technology, applied in connection management, wireless communication, access restriction, etc.

Pending Publication Date: 2021-03-19
GOOGLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be a problem because the RRC connection recovery procedure is not triggered by upper layers

Method used

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  • Resume failure handling after cell reselection
  • Resume failure handling after cell reselection
  • Resume failure handling after cell reselection

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0089] Example 1: A method of handling radio resource control (RRC) connection recovery procedure failure after cell reselection in a user equipment (UE) in breakaway mode with a first cell, the first example method comprising: UE detecting A trigger to an upper layer from the UE or from the UE to resume the RRC connection; start a first timer; in response to detecting the trigger, the UE transmits an RRC connection recovery request message to the first cell; before the first timer expires, The UE initiates a cell reselection procedure and reselects to a second cell; in response to selecting the second cell, if the first timer is running, the UE stops the first timer; the UE stops the RRC connection recovery procedure, and wherein, if the trigger is the UE , then the UE postpones the RRC connection recovery procedure and stays in the detachment mode, and wherein, if the trigger is the upper layer of the UE, then: the UE informs the upper layer that the RRC connection recovery p...

example 2

[0090] Example 2: The method according to example 1, wherein the disengagement mode from the first cell is RRC_INACTIVE state or RRC_IDLE state.

example 3

[0091] Example 3: The method of at least one of the preceding examples, wherein the first timer is a T319 timer.

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Abstract

This document describes techniques and apparatuses for the handling of an RRC connection resume procedure failure after cell reselection in a UE (110). In aspects, the UE (110) selects a first cell (121) and enters a radio resource inactive state with the first cell. The UE (110) detects a trigger from a lower layer or an upper layer of the UE (110). Responsive to detecting the trigger, the UE (110) starts a first timer. The trigger initiates an RRC connection resume procedure. Responsive to the trigger, the UE (110) transmits an RRC connection resume request message to the first cell (121). Before the first timer expires, the UE (110) initiates a cell reselection procedure to select a second cell (123). The UE (110) stops the RRC connection resume procedure and then enters a radio resource idle state.

Description

Background technique [0001] The evolution of wireless communications to fifth-generation (5G) standards and technologies offers higher data rates and greater capacity with improved reliability and lower latency, which enhances mobile broadband services. 5G technology also enables new service categories for connected vehicles, fixed wireless broadband and the Internet of Things (IoT). [0002] A user equipment in a radio resource control (RRC) inactive mode may perform an RRC connection recovery procedure in order to transition to an RRC connected mode in response to a request from an upper layer or a trigger received by a lower layer. In order to initiate the RRC connection recovery procedure, the user equipment sends an RRC connection recovery request message to the network to which the user equipment is connected. After sending the request message to the network, the user equipment may receive a message refusing to resume the RRC connection from the network. [0003] One r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/27H04W76/19
CPCH04W76/27H04W76/19H04W76/30H04W36/0079H04W48/16H04W48/20H04W68/005
Inventor 陈德鸣
Owner GOOGLE LLC