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Power control method and device of E-HICH (Enhanced Dedicated Channel)

A power control and closed-loop power control technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as excessive transmission power and low network quality, improve network quality, reduce transmission power, and reduce downlink interference. Effect

Active Publication Date: 2015-03-11
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an E-HICH power control method and device to solve the problem of low overall network quality caused by excessive E-HICH transmission power in the prior art

Method used

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  • Power control method and device of E-HICH (Enhanced Dedicated Channel)
  • Power control method and device of E-HICH (Enhanced Dedicated Channel)
  • Power control method and device of E-HICH (Enhanced Dedicated Channel)

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Embodiment 1

[0030] In Embodiment 1 of the present invention, a scheme for controlling the transmission power of the user's E-HICH based on the transmission power of the user-specific downlink accompanying DPCH is described in detail.

[0031] In the TD-SCDMA system, the coding process of the E-HICH channel is as follows: figure 2 As shown, among them, E-HICH is used for NodeB to feed back the ACK / NACK information of each corresponding E-DCH transport block to UE, and the information bit length is only 1 bit, and the 1 bit information is extended to 80bit, and complete channel coding, then fill 8bit idle data during interleaving and physical channel allocation, and use figure 2 The slot format shown transmits the 88 bits of data.

[0032] It can be seen that the coding redundancy of E-HICH is very large, so its coding gain is also very large. Such a large coding gain can ensure that the UE can correctly read the one-bit information of ACK / NACK carried by the E-HICH even in an environme...

Embodiment 2

[0040] In the HSPA+ system, since the companion DPCH is canceled, other downlink control channels using closed-loop power control can be considered. In Embodiment 2 of the present invention, it is proposed that based on the transmission power of the user's HS-SCCH or E-AGCH, the user's E -The scheme of controlling the transmission power of HICH, the following takes HS-SCCH as an example to describe in detail, and the specific processing flow is as follows figure 1 shown.

[0041] In the above step S101, the transmission power of the user's HS-SCCH is obtained, and in the above step S102, it is determined that the transmission power of the user's E-HICH is the obtained transmission power of the HS-SCCH minus the preset offset difference, the preset offset may correspond to the HS-SCCH.

[0042] Among them, the setting of the preset offset can be set according to the characteristics of HS-SCCH and E-HICH and the actual network conditions, which is similar to the principle of se...

Embodiment 3

[0060] Based on the same inventive concept, according to the E-HICH power control method provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 3 of the present invention also provides an E-HICH power control device, which can be integrated in RNC or base station , whose structure is shown in the Figure 5 shown, including:

[0061] An acquisition unit 501, configured to acquire the transmission power of the user's designated downlink control channel;

[0062] The determining unit 502 is configured to determine the transmit power of the user's E-HICH according to the acquired transmit power of the designated downlink control channel.

[0063] Preferably, the determining unit 502 is specifically configured to, based on a preset offset between the transmit power of the specified downlink control channel and the transmit power of the user's E-HICH, according to the acquired specified downlink control channel Transmit power, determine t...

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Abstract

The invention discloses a power control method and device of an E-HICH (Enhanced Dedicated Channel). The power control method comprises the following steps of: obtaining a transmitting power of an appointed downlink control channel of a user; and determining the transmitting power of the E-HICH of the user according to the obtained transmitting power of the appointed downlink control channel. According to the technical scheme disclosed by the invention, compared with the remaining transmitting power (which serves as the transmitting power of the E-HICH) of a transmission gap, the transmitting power of the E-HICH is reduced, thus the downlink interference on the same time slot of other cells is reduced, and further the whole network quality is improved.

Description

technical field [0001] The present invention relates to the field of channel power control in the technical field of wireless communication, in particular to an E-HICH power control method and device. Background technique [0002] In TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) network and WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) network in HSPA (High-Speed ​​Packet Access, high-speed link In the system, the indication channel E-HICH (E-DCH HARQ Indication Channel) of HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) of E-DCH (Enhanced Dedicated Channel, Enhanced Dedicated Channel) is introduced into the system. , HARQ indicator channel of E-DCH), which is used for the base station NodeB to feed back the ACK / NACK information of each E-DCH transport block to the user terminal UE. E-HICH occupies a downlink physical channel with SF...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/16H04W52/48
Inventor 刘林南苏翰王小奇
Owner CHINA MOBILE COMM GRP CO LTD
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