Uplink united power control method and downlink united power control method in high speed packet access

A high-speed packet access, closed-loop power control technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of inability to know NodeB strength and inability to determine downlink channel quality.

Inactive Publication Date: 2011-04-20
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the UE only able to detect the signal strength after receiving the E-HICH secondary spreading code, but because it cannot know the strength of the signal sent by the NodeB, it cannot determine the current downlink channel quality

Method used

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  • Uplink united power control method and downlink united power control method in high speed packet access
  • Uplink united power control method and downlink united power control method in high speed packet access
  • Uplink united power control method and downlink united power control method in high speed packet access

Examples

Experimental program
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Effect test

Embodiment 1

[0067] In the uplink joint power control method, the first implementation method is: multiple uplink channels of the same carrier share P e-base , each channel maintains a unified closed-loop power control GAP for joint uplink power control. Each uplink channel adopts a method similar to E-PUCH to perform closed-loop power control, that is, to update the shared P e-base , and with the shared P e-base Based on the determination of the transmit power.

[0068] In this embodiment, uplink joint power control is performed on the E-PUCH, HS-SICH, DPCH and E-RUCCH of the same carrier. In addition, since the current NodeB performs power control on the channels of each user separately, in the present invention, joint power control is performed on each uplink channel belonging to the same user on the same carrier. In the following description, unless otherwise specified, E-PUCH, HS-SICH, DPCH and E-RUCCH all refer to corresponding channels of the same user on the same carrier. The s...

Embodiment 2

[0095] In the uplink joint power control method, the second implementation method is: multiple uplink channels of the same carrier share P e-base , each channel maintains its own closed-loop power control GAP, and performs uplink joint power control. Among them, HS-SICH adopts the existing method to perform closed-loop power control when its own closed-loop power control GAP has not timed out; HS-SICH uses a method similar to E-PUCH to perform closed-loop power control after its own closed-loop power control GAP times out. That is, use the TPC command to update the shared P e-base , and with the shared P e-base Based on the determination of the transmit power.

[0096] In this embodiment, the uplink joint power control is performed on the E-PUCH and HS-SICH of the same carrier, and the specific power control method flow is as follows figure 2 shown, including:

[0097] Step 201, preset power adjustment values ​​of E-PUCH and HS-SICH corresponding to multiple transmission ...

Embodiment 3

[0118] In downlink joint power control, multiple downlink channels of the same carrier share P e-base , each channel maintains its own closed-loop power control GAP, and performs downlink joint power control. The downlink channel for joint power control includes the E-HICH secondary spreading code, so as to realize the power control of the E-HICH secondary spreading code.

[0119] In this embodiment, downlink joint power control is performed on the E-HICH secondary spreading code, HS-SCCH and E-AGCH of the same carrier. In the following description, unless otherwise specified, the second spreading code of E-HICH, HS-SCCH and E-AGCH all refer to corresponding channels of the same carrier. The specific power control method flow is as follows: image 3 shown, including:

[0120] Step 301, presetting the power difference between the two formats of the E-HICH secondary spreading code and the HS-SCCH respectively, and the power between the E-HICH secondary spreading code and the ...

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Abstract

The invention discloses an uplink united power control method, which comprises the following steps of: performing united power control on a plurality of uplink channels of the same carrier wave to ensure that the plurality of uplink channels share Pe-base, and the shared Pe-base can be updated according to the transmit power control (TPC) commands of the plurality of uplink channels of the same carrier wave; and calculating uplink transmit power by using the shared Pe-base and preset power adjustment quantity. The invention also discloses a downlink united power control method. The probability of open loop power control can be reduced as much as possible by the methods, so that the strong interference of open loop power to other channels can be lowered furthest, and the power control performance can be improved.

Description

technical field [0001] The invention relates to a power control technology in a communication system, in particular to an uplink joint power control method and a downlink joint power control method in high-speed packet access (HSPA). Background technique [0002] In the TD-SCDMA system, the throughput of uplink and downlink data can be improved by introducing HSUPA and HSDPA technologies. [0003] In the TD-SCDMA protocol and the High Speed ​​Packet Evolution (HSPA+) protocol, the uplink channels E-PUCH, E-RUCCH, HS-SICH, and DPCH each perform independent uplink power control, and maintain their respective uplink power control in parallel in multiple ways. [0004] Specifically, the uplink power control process for the E-PUCH is as follows: the network configures the expected receiving power for the UE through the radio resource control (RRC) module, which is used for the open-loop power setting (open-loop Pebase) of the E-PUCH. Based on the initially configured expected re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/12H04W52/14
Inventor 范晨沈东栋魏立梅王大飞王浩然贺刚
Owner TD TECH COMM TECH LTD
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