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Power control method and apparatus for down (link) discontinuous transmission channel

A transmission channel and power control technology, which is applied in the direction of transmission control/equalization, transmission system, digital transmission system, etc., can solve the problem of inability to control the power of discontinuous downlink channels, so as to improve resource utilization efficiency, improve power control performance, The effect of speeding up the convergence speed

Inactive Publication Date: 2009-05-27
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

However, when the interval between two E-HICH transmissions is large, the change of the downlink channel environment may far exceed the size of the power adjustment step. At this time, the E-HICH transmission power needs to be adjusted many times to converge to the target transmission power.
[0013] To sum up, the existing solutions cannot effectively control the power of the downlink discontinuous channel

Method used

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  • Power control method and apparatus for down (link) discontinuous transmission channel
  • Power control method and apparatus for down (link) discontinuous transmission channel
  • Power control method and apparatus for down (link) discontinuous transmission channel

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Embodiment Construction

[0047] In the present invention, the channel environment parameter change amount of the downlink discontinuous transmission channel is obtained according to the path loss related information, and then the power control of the downlink discontinuous channel is performed according to the channel environment parameter change amount.

[0048] figure 2 It is a flow chart of downlink discontinuous channel power control in the present invention, such as figure 2 As shown, the process of performing power control on the downlink discontinuous channel includes the following steps:

[0049] Step 201: Obtain channel environment parameter variation according to path loss related information. The path loss related information is the path loss related information of the downlink discontinuous transmission channel, for example, propagation loss, or channel fading, or propagation loss and channel fading, or other related information that can reflect the path loss to a certain extent.

[00...

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Abstract

The invention discloses a power control method and a device for discontinuous downlink transmission channels. The method comprises the following steps: according to correlative path loss information, acquiring variable of channel environmental parameters of the discontinuous downlink transmission channels; and controlling power of the discontinuous downlink channels according to the variable of the channel environmental parameters. According to the proposal, the method and the device can compensate transmitted power of the discontinuous downlink transmission channels in time, increase convergence speed of power control of the discontinuous downlink transmission channels, improve performance of the power control, and improve resource utilization efficiency. In addition, the invention provides multiple methods for acquiring the correlative path loss information, which can provide realizing conditions for acquiring the correlative path loss information based on modification of the prior protocol as little as possible.

Description

technical field [0001] The present invention relates to power control technology, in particular to a power control method and device for downlink discontinuous transmission channels. Background technique [0002] Low Chip Rate Time Division Duplex (LCR TDD) High Speed ​​Packet Access (HSPA) technology includes High Speed ​​Downlink Packet Access (HSDPA) technology and High Speed ​​Uplink Packet Access (HSUPA) technology. In HSPA technology, several downlink shared control channels have been introduced successively, including the shared control channel of the high-speed shared data channel (HS-SCCH), the acknowledgment indicator channel (E-HICH), and the enhanced uplink absolute access grant channel (E-AGCH). ), etc., are mainly used to transmit control signaling related to HSPA data transmission. [0003] Among them, HS-SCCH and E-AGCH are used to transmit resource scheduling information sent by Node B. Closed-loop power control is adopted, that is, the initial power is set...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L1/00H04L1/16H04L1/18
CPCY02D30/70
Inventor 朱向前齐亮周海军
Owner CHINA ACAD OF TELECOMM TECH
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