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A method and an apparatus for updating time division duplex TDD uplink and downlink configuration

A technology of time-division duplexing and configuration updating, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as inconsistent understanding of TDD UL/DL configurations

Active Publication Date: 2014-03-26
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Similarly, in method 2, after receiving the RRC signaling and successfully completing the analysis, the terminal can obtain the updated TDD UL / DL configuration information and take effect, but the base station does not know when the terminal receives the RRC reconfiguration completion message. The RRC message is correctly parsed and applied, so there may be inconsistencies in the understanding of the TDD UL / DL configuration between the base station and the terminal during this period, such as Figure 4 shown

Method used

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  • A method and an apparatus for updating time division duplex TDD uplink and downlink configuration
  • A method and an apparatus for updating time division duplex TDD uplink and downlink configuration
  • A method and an apparatus for updating time division duplex TDD uplink and downlink configuration

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Experimental program
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Effect test

Embodiment 1

[0112] In this step, method 1 is adopted for TDD UL / DL configuration change notification, as follows:

[0113] Step 1: The base station determines that the TDD UL / DL configuration needs to be changed;

[0114] The base station decides to change the TDD UL / DL configuration according to the amount of uplink and downlink service data in the cell and determines the serial number of the updated TDD UL / DL configuration.

[0115] Step 2: The base station notifies the UE in the cell of the system information update and the number of the updated TDD UL / DL configuration;

[0116] Once the base station determines to change the TDD UL / DL configuration of a certain cell, it needs to notify the terminal system information in the cell of the change through a paging message within the BCCH modification period n and send the updated UL / DL configuration within the BCCH modification period n+1. System information, the updated system information carries the number of the updated TDD UL / DL config...

Embodiment 2

[0125] In this embodiment, the TDD UL / DL configuration change notification adopts Method 1, which is as follows:

[0126] Step 1: The base station determines that the TDD UL / DL configuration needs to be changed;

[0127] The base station decides to change the TDD UL / DL configuration according to the amount of uplink and downlink service data in the cell and determines the serial number of the changed TDD UL / DL configuration.

[0128] Step 2: The base station notifies the UE in the cell of the system information update and the number of the updated TDD UL / DL configuration;

[0129] Once the base station determines that it is necessary to change the TDD UL / DL configuration of a certain cell, it needs to notify the terminals in the cell of the change of system information through a paging message within the BCCH modification period n and send the updated UL / DL configuration within the BCCH modification period n+1. System information. The updated system information carries the nu...

Embodiment 3

[0135] In this embodiment, the TDD UL / DL configuration change is notified using the second method, which is as follows:

[0136] Step 1: The base station determines that the TDD UL / DL configuration needs to be changed;

[0137] The base station decides to change the TDD UL / DL configuration according to the amount of uplink and downlink service data in the cell and determines the serial number of the updated TDD UL / DL configuration.

[0138] Step 2: The base station notifies the UE in the cell of the system information update and the number of the updated TDD UL / DL configuration;

[0139] Once the base station determines that the TDD UL / DL configuration of a certain cell needs to be changed, it needs to notify the terminals in the cell that support the dynamic change of TDD UL / DL configuration through a paging message within the BCCH modification period n that the TDD uplink and downlink configuration of the cell has changed , in addition to carrying the TDD UL / DL configuration ...

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Abstract

The embodiment of the invention discloses a method and an apparatus for updating time division duplex TDD uplink and downlink configuration and relates to wireless communication field. The method and the apparatus are used for preventing a problem of inconsistency of TDD uplink and downlink configuration understood by a base station and a terminal in order to guarantee system transmission performance. The base station and the terminal determine effective time of updated TDD uplink and downlink configuration according to a same effective time determining method and begin to use the updated TDD uplink and downlink configuration to perform data transmission when the effective time is reached. The TDD uplink and downlink configuration that has not updated is always used for performing data transmission before the effective time is reached. Thus, the problem of inconsistency of TDD uplink and downlink configuration understood by the base station and the terminal is prevented and the system transmission performance is guaranteed.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for updating time division duplex uplink and downlink configurations. Background technique [0002] Long Term Evolution (LTE) Time Division Duplex (TDD) systems such as figure 1 As shown, a radio frame has a length of 10 ms and includes two types of special sub-frames and regular sub-frames, a total of 10 sub-frames, and each sub-frame is 1 ms. The special subframe is divided into 3 time slots: Downlink Pilot Slot (DwPTS), Guard Period (Guard Period, GP) and Uplink Pilot Slot (UpPTS). Regular subframes are further divided into uplink subframes and downlink subframes, which are used to transmit uplink / downlink control signaling and service data, etc. respectively. [0003] The LTE TDD system defines seven TDD uplink and downlink (UL / DL) configurations, as shown in Table 1 below. The common features of these seven TDD UL / DL configurations are as follows:...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04L1/00
CPCH04W72/0406H04W72/04H04L1/00H04L1/1854H04L1/1864H04L1/1887H04L1/1896H04W72/20
Inventor 赵亚利许芳丽潘学明彦楠付喆
Owner DATANG MOBILE COMM EQUIP CO LTD
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