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Method and system for switching return link subframe configurations in time division duplex (TDD) system

A backhaul link subframe, time division duplex system technology, applied in the field of communication

Active Publication Date: 2011-05-25
HAIMEN THE YELLOW SEA ENTREPRENEURSHIP PARK SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In view of the above analysis, the present invention aims to provide a method and system for switching backhaul link subframe configuration in a time division duplex system to solve the problem in the prior art when the Un UL / DL Sub-config used by the RN needs to be changed , the problem of selecting an appropriate target subframe configuration for the backhaul link

Method used

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  • Method and system for switching return link subframe configurations in time division duplex (TDD) system
  • Method and system for switching return link subframe configurations in time division duplex (TDD) system
  • Method and system for switching return link subframe configurations in time division duplex (TDD) system

Examples

Experimental program
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example 1

[0072] Example 1: The eNB determines the target backhaul link subframe configuration for switching according to the downlink / uplink subframe ratio requirements of the target backhaul link subframe configuration

[0073] Taking TDD UL / DL Config#1 as an example, the original backhaul link subframe configuration currently used by the RN on the backhaul link is Un UL / DL Sub-config#0, and the Un DL / UL subframe ratio is 1:1. The eNB needs to switch the subframe configuration of the backhaul link according to the network load requirement, so that the Un DL / UL subframe ratio is 2:1. Then the backhaul link subframe configuration in TDD UL / DL Config#1 with the Un DL / UL subframe ratio of 2:1 includes UnUL / DL Sub-config#2, #3. The eNB arbitrarily selects one of the configurations, such as Un UL / DL Sub-config#3, and instructs the RN to be the target backhaul link subframe configuration of the backhaul link subframe configuration switching.

[0074] Further, for the two configurations Un U...

example 2

[0076] Example 2: The eNB determines the switching target backhaul link subframe configuration according to the uplink subframe number of the original backhaul link subframe configuration.

[0077]Taking TDD UL / DL Config#2 as an example, the original backhaul link subframe configuration currently used by the RN on the backhaul link is Un UL / DL Sub-config#4, the Un UL subframe is subframe #2, and the Un DL subframe is The frames are subframes #3, #4, #8. According to the network load, the eNB needs to switch the subframe configuration of the backhaul link to reduce the number of Un DL subframes. Then the configuration in which the number of Un DL sub-frames in TDD UL / DL Config#2 is less than 3 subframes includes Un UL / DL Sub-config#0, #1, #2, #3. The eNB can configure the uplink subframe number in Un UL / DLSub-config#4 to be #2 according to the original backhaul link subframe, and Un UL / DL Sub-config#0, #2 are the same as Un UL / DLSub-config#4 The subframe #2 is used as the Un ...

example 3

[0079] Example 3: The eNB determines the switching target backhaul link subframe configuration according to the downlink subframe number of the original backhaul link subframe configuration.

[0080] Taking TDD UL / DL Config#2 as an example, the original backhaul link subframe configuration currently used by the RN on the backhaul link is Un UL / DL Sub-config#5, the Un UL subframe is subframe #7, and the Un DL subframe is The frames are subframes #3, #8, #9. According to the network interference situation, the eNB needs to switch the subframe configuration of the backhaul link, and avoid using subframe #7 as the Un UL subframe. Then in TDD UL / DL Config#2, the configuration that does not use subframe #7 as Un UL subframe includes Un UL / DL Sub-config#0, #2, #4. The eNB can configure the downlink subframe numbers in Un UL / DL Sub-config#5 as #3, #8, #9 according to the original backhaul link subframe, while Un UL / DL Sub-config#2 and #4 use subframe numbers Frame #4 is Un DL subfra...

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Abstract

The invention discloses a method and system for selectively switching return link subframe configurations in a time division duplex (TDD) system. The method comprises the following steps: a network side selects and determines the target return link subframe configuration according to the influence factors of the target return link subframe configuration and notifies a relay node (RN) of the target return link subframe configuration; and the RN switches the original return link subframe configuration which is being used at present to the target return link subframe configuration according to the target return link subframe configuration selected and determined by the network side. The invention has the following beneficial effects: the method and system are used in the process of switching the return link subframe configurations changed by the network side; and not only the backward compatibility is ensured but also the problem of selecting appropriate target subframe configuration for return link subframe configuration switching is solved while not introducing the signaling overhead.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for switching backhaul link subframe configuration in a time division duplex system. Background technique [0002] In the network where RN (Relay Node, relay station) is introduced, such as figure 1 As shown, the link between eNB (evolved base station in the network) and M-UE (Macro User Equipment, macro cell user) is called direct transmission link, and the link between eNB and RN is called backhaul link, also called It is an Un interface, and the link between the RN and the R-UE (Relay User Equipment, relay domain user) is called an access link. [0003] Such as figure 2 As shown, in the LTE (Long Term Evolution, Long Term Evolution) system, one 10ms radio frame frame is composed of ten 1ms subframe subframes. TDD (Time Division Duplex, Time Division Duplex) system has 7 different uplink and downlink subframe configurations to meet different netwo...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04W72/04
CPCH04W28/06H04B7/2643
Inventor 杨瑾毕峰袁明梁枫吴栓栓
Owner HAIMEN THE YELLOW SEA ENTREPRENEURSHIP PARK SERVICE CO LTD
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