Method and device for realizing power control of downlink high-speed shared control channel

A technology of high-speed sharing control and power control, applied in the direction of transmission control/equalization, etc., can solve the problem of inability to ensure the correct reception of the UE

Inactive Publication Date: 2008-10-22
GLOBAL INNOVATION AGGREGATORS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the enhanced CELL_FACH state, if the downlink HS-SCCH power control cannot be realized, it is impossible to ensure that the UE can correctly receive the broadcast control channel BCCH and common control CCCH information

Method used

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  • Method and device for realizing power control of downlink high-speed shared control channel
  • Method and device for realizing power control of downlink high-speed shared control channel
  • Method and device for realizing power control of downlink high-speed shared control channel

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Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1 is a method for realizing downlink HS-SCCH power control when sending BCCH information to UE in the enhanced CELL_FACH state of the present invention.

[0068] In the first embodiment, if figure 2 As shown, assume that there are UEs in the macro cell 1 and UE 2 Two user terminals, UE 1 and UE 2 The H-RNTI are the H-RNTI 1 and H-RNTI2 , UE reported by RACH 1 and UE 2 The signal-to-noise ratios of the CPICH are (Ec / Io) pilot，1 and (Ec / Io) pilot，2 . combine figure 1 The specific implementation is as follows:

[0069] Since the coverage type of the cell is a macro cell, the receiving performance index requirement of HS-SCCH (Ec / Io) hs-scch_req is: (Ec / Io) hs-scch_req =(Ec / Io) hs-scch_macro =-10.5dB.

[0070] Assuming that the mapping method adopts Method 1, then under the same transmit power, UE 1 The virtual reception quality of HS-SCCH (Ec / Io) hs-scch_vir，i is: (Ec / Io) hs-scch_vir，1 =(Ec / Io) pilot，1 ;UE 2 The virtual reception quality of H...

Embodiment 2

[0078] Embodiment 2 is a method for realizing downlink HS-SCCH power control when CCCH information is sent to UE in the enhanced CELL_FACH state of the present invention.

[0079] In the second embodiment, if figure 2 As shown, assume that there are UEs in the macro cell 1 and UE 2 Two user terminals, the H-RNTI of the two user terminals are H-RNTI 1 and H-RNTI 2 , UE reported by RACH 1 and UE 2 The signal-to-noise ratios of the CPICH are (Ec / Io) pilot，1 and (Ec / Io) pilot，2 . combine figure 1 The specific implementation is as follows:

[0080] Since the coverage type of the cell is a macro cell, the receiving performance index requirement of HS-SCCH (Ec / Io) hs-scch_req is: (Ec / Io) hs-scch_req =(Ec / Io) hs-scch_macro =-10.5dB.

[0081] Assuming that the mapping method adopts Method 1, then under the same transmit power, UE 1 The virtual reception quality of HS-SCCH (Ec / Io) hs-scch_vir，i is: (Ec / Io) hs-scch_vir，1 =(Ec / Io) pilot，1 ;UE 2 The virtual reception qua...

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Abstract

The invention provides a downstream HS-SCCH power control method and a device for carrying out the same. In the state of CELL_FACH, the method controls the emission power of the an HS-SCCH by using signal-to-noise Ec / Io information of a downstream CPICH which is reported by a UE through an RACH, thereby realizing the power control of the downstream HS-SCCH under the condition of enhanced CELL_FACH, and ensuring that the UE in enhanced CELL_FACH condition can correctly receive BCCH and CCCH information.

Description

technical field [0001] The present invention relates to a high-speed downlink packet access (HSDPA, High Speed ​​Downlink PacketAccess) technology, in particular to a method for realizing downlink high-speed shared control channel power control under an enhanced cell forward access channel (CELL_FACH, CELL ForwardAccess Channel) state and device. Background technique [0002] The HSDPA technology is a downlink enhancement technology introduced in the R5 protocol of the Wideband Code Division Multiple Access (WCDMA) standard organization 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project). HSDPA technology uses key technologies such as adaptive modulation and coding (AMC), hybrid automatic retransmission request (HARQ, Hybrid Automatic Retransmission Request), fast scheduling, and introduces three new physical channels to increase the transmission rate of downlink data, making The downlink peak rate can reach 10.8Mbps to 42Mbps. Among them, the thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
Inventor 王琛
Owner GLOBAL INNOVATION AGGREGATORS LLC
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