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System information acquisition method, subscriber equipment and communication system

A technology of user equipment and system information, applied in the field of wireless transmission, can solve the problems of high downlink signaling overhead and inability to utilize downlink resources most effectively

Inactive Publication Date: 2010-06-09
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a large overhead for downlink signaling, so that downlink resources cannot be used most effectively

Method used

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  • System information acquisition method, subscriber equipment and communication system
  • System information acquisition method, subscriber equipment and communication system
  • System information acquisition method, subscriber equipment and communication system

Examples

Experimental program
Comparison scheme
Effect test

example 1-2

[0037] Example 1-2: The control channel detection unit 1021 of the LTE-A user equipment obtains the notification of system information change by detecting the information on the common control channel.

[0038] Such as Image 6 As shown, a new radio network temporary identifier X-RNTI is introduced to indicate the change of system information. The X-RNTI is a specific 16-bit binary value. The control channel detection unit 1021 of the LTE-A user equipment acquires notification of system information changes by detecting whether there is downlink control information corresponding to the X-RNTI on the common control channel at a specific moment.

[0039] In this embodiment, three application examples are given:

[0040] Example 1-2A: In a BCCH modification period, the number of times that a fixed user detects whether the system information changes is N_x. The control channel detection unit 1021 of the LTE-A user equipment is based on the length of the current BCCH modification...

example 1-2B

[0041] Example 1-2B: In a BCCH modification period, the number of interval frames between fixed detection subframes is I_x. The control channel detection unit 1021 of the LTE-A user equipment determines the specific position of the detection subframe according to the length of the current BCCH modification cycle and the number of interval frames I_x obtained from the system information. For example, the BCCH modification period is 4 frames, that is, 40 subframes. If the above N x is 10 subframes, the third subframe of each frame can be set as a detection subframe to detect whether the system information changes. After the X-RNTI is detected in a detection subframe, the control channel detection unit 1021 of the LTE-A user equipment does not detect subsequent detection subframes in the current BCCH modification period.

example 1-2C

[0042] Example 1-2C: The position of the fixed detection subframe within the BCCH modification period. The sending / receiving unit 1010 of the base station notifies the LTE-A user equipment of the fixed location by broadcasting system information. The control channel detection unit 1021 of the LTE-A user equipment detects whether the system information changes in a fixed detection subframe within the BCCH modification period. After detecting the X-RNTI, the control channel detection unit 1021 of the LTE-A user equipment does not detect the remaining detection subframes in the current BCCH modification period.

[0043] Example 1-3: If Figure 7 As shown, the sending / receiving unit 1010 of the base station sends the notification of system information change to the LTE-A user equipment through high layer signaling. The LTE-A user equipment obtains the notification of system information change through the sending / receiving unit 1020 .

[0044] (2) The LTE-A user equipment acquir...

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PUM

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Abstract

The invention relates to system information acquisition method, subscriber equipment and a communication system in an LTE-A system. For LTE-A user equipment working at an RRC-CONNECTED mode in the invention, if a BCCH and an SCH are not contained by the working basic bandwidth of the LTE-A subscriber equipment, and when system information generates changement, the relevant information is acquiredby the subscriber equipment through a common control channel, the subscriber equipment is switched to the basic bandwidth which contains the BCCH and the SCH from a ubiety basic bandwidth, and after novel system information is acquired, the subscriber equipment of the LTE-A system is switched to the previous basic bandwidth and works on. By the method, the subscriber equipment of the LTE-A can flexibly acquire the system information through the method, and the cost of down signaling is saved because the BCCH and the SCH are not contained at every basic bandwidth.

Description

technical field [0001] The present invention generally relates to the technical field of wireless transmission, and specifically relates to a method for acquiring system information in an LTE-A system, user equipment and a communication system. Background technique [0002] In recent years, the rapid development of personal communication has greatly promoted the miniaturization and diversification of personal communication equipment. The introduction of data services such as multimedia messaging, online games, video on demand, music downloads and mobile TV has greatly increased the demand for personal communication and entertainment. Therefore, in order to provide users with a greater peak rate, a wider system frequency band has become an important requirement in the next generation mobile communication system. [0003] From August 18th to 22nd, 2008, the 54th meeting of 3GPP RAN1 was held in Jeju Island, South Korea, where possible related technical proposals about LTE-Adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W76/04
Inventor 陈晨黄磊刘仁茂丁铭孙国林张应余
Owner SHARP KK