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A method for restoring rrc connection and relay device rn

A technology of relay equipment and connection re-establishment, applied in connection management, electrical components, wireless communication, etc., can solve the problems of inability to restore RRC connection to RRC connection, inability to initiate Attach process, etc.

Inactive Publication Date: 2011-12-21
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the RN is in the RRC idle state, its EMM state is EMM-REGISTERED, and the Attach process cannot be initiated according to the existing technology
[0023] It can be seen that when the re-selected DeNB is different from the original DeNB after the radio link failure of the RN, the RRC connection cannot be restored according to the process of restoring the RRC connection of the existing UE

Method used

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  • A method for restoring rrc connection and relay device rn
  • A method for restoring rrc connection and relay device rn
  • A method for restoring rrc connection and relay device rn

Examples

Experimental program
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Effect test

Embodiment 1

[0054] In this embodiment, a trigger condition for selecting a donor cell and initiating a non-access stratum procedure on the donor cell to restore the RRC connection is that a radio link failure occurs between the RN and the original DeNB. The attach trigger condition is that the packet system mobility management EMM state of the RN is changed to the logout state.

[0055] The protocol stack of the RN can be divided into an AS layer and a NAS layer. The AS layer is mainly responsible for functions related to air interface access; the NAS layer performs non-access functions that are not related to air interface access. This embodiment describes the process of restoring the RRC connection from the perspectives of the AS layer and the NAS layer.

[0056] Such as Figure 6 As shown, the methods for restoring the RRC connection include:

[0057] Step S601, when the AS layer of the RN determines that a radio link failure occurs with the original DeNB, it determines that a donor...

Embodiment 2

[0096] In this embodiment, a trigger condition for selecting a donor cell and initiating a non-access stratum procedure on the donor cell to restore the RRC connection is that RRC connection re-establishment failure occurs between the RN and the original donor base station. The attach trigger condition is that the packet system mobility management EMM state of the RN is changed to the logout state.

[0097] Such as Figure 8 As shown, the methods for restoring the RRC connection include:

[0098] In step S801, the AS layer of the RN determines that RRC connection re-establishment fails with the original DeNB, determines that a donor cell needs to be selected and initiates a non-access stratum process on the donor cell to restore the RRC connection, and sends a failure indication to the NAS layer.

[0099] The re-establishment of the RRC connection is triggered by failure of the radio link between the RN and the original donor base station, or by a reconfiguration failure of t...

Embodiment 3

[0106] In this embodiment, a trigger condition for selecting a donor cell and initiating a non-access stratum procedure on the donor cell to restore the RRC connection is that a radio link failure occurs between the RN and the original DeNB. The attach trigger condition is that the packet system mobility management EMM state of the RN is changed to the logout state, and the EMM state is modified through a detach process different from Embodiment 1.

[0107] Such as Figure 9 As shown, the methods for restoring the RRC connection include:

[0108] Step S901, when the AS layer of the RN determines that a radio link failure occurs with the original DeNB, it determines that a donor cell needs to be selected and initiates a non-access stratum process on the donor cell to restore the RRC connection, and gives a failure indication to the NAS layer; specifically the same Step S601 in Embodiment 1.

[0109] Step S902, the NAS layer of the RN receives and saves the failure indication....

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Abstract

The present invention relates to the technical field of wireless communication, and is used for optimizing the process of restoring an RRC connection, and specifically discloses a method for restoring a radio resource control RRC connection and a relay device RN. When the donor cell initiates a non-access stratum procedure to restore the RRC connection, select a donor cell and perform the steps of making the RN meet the attachment trigger condition; when the RN determines that the attachment trigger condition is met, initiate the attachment process on the selected donor cell, The RRC connection between the donor base stations corresponding to the selected donor cell is resumed. The present invention enables the RN to restore the RRC connection without distinguishing whether the donor base station has changed, and adopts a unified process to successfully restore the RRC connection, thereby enhancing the flexibility of the RN's deployment location.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for restoring a radio resource control RRC connection and a relay device RN. Background technique [0002] In the future mobile communication systems, such as B3G (Beyond Third Generation) or LTE-A (Long Term Evolution-Advanced) systems will provide higher peak data rates and cell throughput, while also requiring greater bandwidth. At present, there are very few unallocated bandwidths below 2GHz, and part or all of the bandwidth required by the B3G system can only be found in higher frequency bands, such as above 3GHz. The higher the frequency band, the faster the attenuation of radio wave propagation and the shorter the transmission distance. Therefore, in the same coverage area, to ensure the continuous coverage of the signal, more base stations are needed, and the construction of the base station is more complicated, so the network deployment is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W68/00H04W76/00H04W76/02
Inventor 杨义
Owner CHINA ACAD OF TELECOMM TECH
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