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Method for indicating system message changes, method and device for obtaining system message

A system message and system message block technology, which is applied in the directions of selection devices, electrical components, access restrictions, etc., can solve the problems of not maintaining uplink synchronization, complicated operations, discontinuous data transmission and reception, etc.

Active Publication Date: 2008-07-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the power-saving mode, the UE does not continuously send and receive data, that is to say, the UE may receive data for a period of time, and then sleep for a period of time. During the sleep time, the UE may not maintain uplink synchronization; when the uplink is out of sync, if the UE wants to For uplink access, you need to capture some system parameters about access, so in this case, you need to capture system information, but in LTE, paging is only used for UEs in the idle state, and for UEs in the connected state UE, paging is no longer considered necessary
Therefore, in the prior art, for such a UE in the connected state power-saving mode, when the system information changes, the network side sends a radio resource control (Radio Resource Control, RRC) message to prompt the system information to change, but when the UE is in When sleeping, the RRC message cannot be sent to the UE immediately. It can only be cached first. When the UE wakes up, the Media Access Control (MAC) layer on the network side can send the RRC message to the UE. This process requires the interaction of primitives between layers, making the operation very complicated

Method used

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  • Method for indicating system message changes, method and device for obtaining system message
  • Method for indicating system message changes, method and device for obtaining system message
  • Method for indicating system message changes, method and device for obtaining system message

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The network side and all UEs pre-agreed on the common indication information indicating that the system information changes. When the system information changes, the network side sends layer 1 and layer 2 control signaling to the UE through the layer 1 and layer 2 control channel, carrying the common indication information. A specific embodiment of the structure of layer 1 and layer 2 control channels is as follows figure 1 As shown, the following information elements are included:

[0032] 1) UE identification (id: UE) information element, used to carry the identification information of the UE;

[0033] 2) The public system information change indication information element is used to carry the public indication information indicating that the system information has changed;

[0034] 3) resource block assignment and modulation and coding mode information element, which is used to carry resource block assignment information and data specific modulation mode and coding m...

Embodiment 2

[0050] When the UE accesses the communication system, the network side uniquely assigns special identification information to the UE; that is, the network side assigns two UE identities to the UE when the UE accesses the system, one UE id is only used to accept normal data; the other The special identifier is used to indicate that the system message has changed, and the special identifier is also used to accept normal data. When the system information changes, the network side sends layer 1 layer 2 control signaling carrying special identification information to the UE through the layer 1 layer 2 control channel. A specific embodiment of the structure of layer 1 and layer 2 control channels is as follows figure 2 As shown, the following information elements are included:

[0051] 1) The UE special identification information element is used to carry the special identification information assigned to the UE when the UE accesses the communication system and is used to indicate ...

Embodiment 3

[0068] Similar to Embodiment 2, when the UE accesses the communication system, the network side uniquely assigns special identification information to the UE; that is, when the UE accesses the system, the network side assigns two UE identities to the UE, and one UE identity is only used to accept Normal data; another special flag is used to indicate that the system message has changed, and this special flag is also used to accept normal data. When the system information changes, the network side sends layer 1 layer 2 control signaling to the UE through the layer 1 layer 2 control channel. A specific embodiment of the structure of layer 1 and layer 2 control channels is as follows image 3 As shown, the following information elements are included:

[0069] 1) The UE special identification information element is used to carry the special identification information assigned to the UE when the UE accesses the communication system and is used to indicate the change of the system m...

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PUM

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Abstract

The invention relates to a method for indicating system message change, which comprises the following steps: the network side sends control orders to user equipment UE through layer 1 and layer 2, and carries indication information showing the change of system information and / or lag value information of main information block of system information. The invention also discloses a method of obtaining system information, which comprises: UE under connection state supervises layer1 and layer 2 control signal channel and captures indication information showing the change of system information and / or lag value information of main information block of system information; when lag value of current main information block of network side and that of local stored are different, the lag value of broadcast signal channel compared with other system information block in main information block is read; and the corresponding system information block content, of which tag value changes, is captured according to scheduling information of system information block provided by the main information block. The invention facilitates the UE under connection state to conveniently obtain changed system information.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for indicating system message changes in a long-term evolution (LTE) system, and a method for a user equipment (UserEquipment, UE) in a connected state to acquire changed system messages The method, as well as the corresponding device and UE for indicating system information changes. Background technique [0002] System messages include: UE timers and counters, public land mobile network (Public Land Mobile Network; PLMN) identifier (ID), registration area ID, parameters required for cell selection and reselection; cell ID, public channel Configuration information, measurement control messages, etc. [0003] In the prior art, system information is sent through a broadcast channel (Broadcast Channel, BCH) in the form of a Main Information Block (Main Information Block, MIB) and a system information block (System Information Block, SIB). [0004] When the sy...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/34H04W48/08
CPCH04W48/08
Inventor 陆志宏乔汉·约翰逊
Owner HUAWEI TECH CO LTD