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Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system

A TD-SCDMA, transmission power control technology, applied in the direction of synchronization device, power management, wireless communication, etc., can solve the problem of error adjustment, etc., to achieve the effect of solving error adjustment

Inactive Publication Date: 2012-04-25
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the technical problem solved by the present invention is to provide a method and device for transmission power control and synchronization control in a TD-SCDMA system to solve the problem of related control of all downlink or uplink time slots allocated by NodeB or UE in response to RNC commands that lead to misadjustment issues

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  • Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system
  • Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system
  • Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system

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Embodiment 1

[0085] The methods described in Embodiment 1 and Embodiment 2 are all methods for performing downlink transmission power control in the TD-SCDMA system. In conjunction with Embodiment 3, the method for performing uplink transmission power control and synchronization control in the TD-SCDMA system is as follows To be more specific, Figure 5 is a flowchart of the method.

[0086] In step 501, the UE receives an uplink power control command and an uplink synchronization command for a certain uplink time slot sent by the NodeB in the current subframe.

[0087] In step 502, the UE inquires whether it has sent information to the NodeB in the uplink time slot of the first D2 subframes of the current subframe, and if yes, executes step 503; otherwise, executes step 504.

[0088] Here D2 is the processing delay required for the NodeB to generate the uplink power control command and the uplink synchronization command, which is calculated in units of subframes. After the NodeB receive...

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Abstract

The present invention provides a method for controlling the descending transmission power in the TD-SCDMA system. The method comprises the following steps: receiving the control command of the descending power aiming at the descending time slot by a NodeB; inquiring whether the NodeB has transmitted an information in the descending time slot corresponding with D1 subframe ahead the current subframe; and if true, facilitating that the NodeB responses the control command of the descending power; wherein, D1 is the processing time slot required for generating the control command of the descending power by the user equipment UE. The invention also provides a method for executing ascending transmission power control and synchronization control in the TD-SCDMA system, and a device for executingdescending transmission power control in the corresponding TD-SCDMA system and a device for executing ascending transmission power control and synchronization control in the TD-SCDMA system. The method and the device according to the invention can settle the problem of error adjustment caused by the responding of NodeB or UE to the control command of all ascending or descending time slots distributed by RNC.

Description

technical field [0001] The present invention relates to the technical field of information transmission control in Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, in particular to a method and device for transmission power control and synchronization control in TD-SCDMA system. Background technique [0002] In the TD-SCDMA system, when a user equipment (UE) establishes a connection with the network side, the base station controller (RNC) will allocate resources required for uplink and downlink transmission to the UE. Then in each subframe, the base station (NodeB) will send an Uplink Power Control (ULTPC) command and an Uplink Synchronization (SS) command to the UE. The UE will adjust its uplink transmission power according to the uplink power control command sent by the NodeB, and adjust the timing advance of information transmission according to the uplink synchronization command sent by the NodeB. In each subframe, the UE will also send a downl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/54H04W56/00H04W72/12
Inventor 徐辉
Owner TD TECH COMM TECH LTD