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Uplink power control method, device and terminal

A power control and terminal technology, applied in the field of communication, can solve problems such as waste of physical resources, and achieve the effect of reducing consumption

Active Publication Date: 2011-04-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the inventor found in the process of implementing the present invention that no matter whether the value of the uplink power control adjustment parameter needs to be carried, the DCI will reserve TPC bits for the uplink power control adjustment parameter. For some scenarios where the power control is slow In terms of , existing technical solutions will cause waste of physical resources

Method used

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  • Uplink power control method, device and terminal

Examples

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specific Embodiment approach 1

[0113] Specific implementation manner 1: MAC (Medium Access Control, Medium Access Control) layer signaling may be used to perform power control. That is, the uplink power adjustment parameter may be carried in the medium access control MAC layer signaling according to a preset format, and at this time, the MAC signaling does not carry other information except the uplink power adjustment parameter.

[0114] Specifically, a new MAC control PDU (Protocol Data Unit, protocol data unit) may be set, or a MAC control IE manner may be set. Among them, when implemented as a MAC control PDU, it is equivalent to sending the power control information as a separate MAC layer signaling; when implemented as a MAC control IE, the power control information can be placed in a certain In this case, it is equivalent to adding the power control information as a field to other MAC control PDUs for transmission.

[0115] When the parameters required for uplink power adjustment are sent through the...

specific Embodiment approach 2

[0128] Specific Embodiment 2: The uplink power control can be performed by using the modified physical layer signaling. That is, the uplink power adjustment parameter may be carried in physical layer signaling according to a preset format, and at this time, the physical layer signaling does not carry other information except the uplink power adjustment parameter.

[0129] In this specific implementation mode, the PDCCH physical channel can also be used to send power control information, but the difference in the prior art is that some PDCCH formats for power control in the prior art are removed, such as the power control format accompanying resource scheduling, and the DCI format 3 and DCI format 3A are combined to realize the indication of non-scheduled resources. That is, there are no longer multiple DCI formats, and only one control signaling format is used instead to realize the transmission of power control information.

[0130] In the prior art, in the DCI format 3 / 3A o...

specific Embodiment approach 3

[0134] Specific Embodiment 3: Perform power control through RRC signaling. That is, the uplink power adjustment parameter may be carried in RRC layer signaling according to a preset format, and the RRC layer signaling is not used to carry other information except the uplink power adjustment parameter.

[0135] In the third specific embodiment, the definition of the power control of the terminal can be added in the uplink power control IE (information element, information element). Since the RRC layer belongs to a high-level protocol, the definition of the message format can be relatively flexible, and the It must be expressed in binary, for example, for various situations, it can be directly defined as follows:

[0136] PUSCH cumulative power control value enumeration value {-1, 0, 1, 3}

[0137] The absolute power control value of PUSCH enumeration value {-4, -1, 1, 4}

[0138] Enable cumulative power value Boolean

[0139] PUCCH power control value enumerated value {-1, 0...

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Abstract

The invention discloses an uplink power control method which comprises the following steps: determining uplink power regulation parameters, wherein the uplink power regulation parameters include a channel type and a power control value; and carrying the uplink power regulation parameters in an independent power control signaling in a preset format, and transmitting to the terminal so that the terminal can carry out uplink power control based on the uplink power regulation parameters. By using the invention, bits do not need to be reserved for a transmit power control (TPC) command word in each downlink control information (DCI) format, thereby reducing the consumption of physical resources.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an uplink power control method, device and terminal. Background technique [0002] Currently, in the LTE (Long Term Evolution-Advanced, long-term evolution-advanced) system, power control includes downlink power control and uplink power control, and the downlink power control is implemented through base station allocation. [0003] In the prior art, the transmission of uplink power control parameters to the terminal is realized by carrying a TPC (Transmit Power Control, transmission power control) command field in DCI (Downlink Control Information, downlink control information). DCI has a variety of formats, and the power control of DCI formats 0, 1, 1A, 1B, 1D, 2, or 2A are commands accompanied by resource allocation. In these DCI formats, there are 2-bit TPC command fields. Indicates the power control information corresponding to the channel that needs to be adj...

Claims

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Application Information

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IPC IPC(8): H04W52/14H04W52/54
Inventor 于映辉刘德平马慧宋巍巍
Owner HUAWEI TECH CO LTD
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