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Uplink power control method, user equipment and base station

A technology of power control and user equipment, applied in the field of communication, can solve problems such as inaccurate calculation and affecting uplink transmission performance, and achieve the effect of improving performance

Active Publication Date: 2016-08-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the actual path loss compensation for the target RRH does not match the measured path loss, resulting in inaccurate calculation of uplink transmit power, which in turn affects the performance of uplink transmission

Method used

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  • Uplink power control method, user equipment and base station
  • Uplink power control method, user equipment and base station
  • Uplink power control method, user equipment and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The UE receives the CSI-RS configuration information sent by the eNodeB. The configuration information includes reference signal port information and reference signal power information. In this embodiment, the reference signal port information is an explicit indication, which may be in the form of a bitmap, for example.

[0054] For example, it is assumed that the reference signal port information adopts the reference signal port bitmap of the CSI-RS configuration of 1 antenna port (the number of CSI-RS ports is 1). Table 1 is an example of a CSI-RS configuration table. As shown in Table 1, there are a total of 32 CSI-RS configurations for one antenna port, and a 32-bit bitmap can be used, and each bit of the bitmap indicates whether the corresponding antenna port performs path loss measurement. For example, bit 1 indicates that path loss measurement needs to be performed, bit 0 indicates that path loss measurement is not performed, and vice versa. The mod in Table 1...

Embodiment 2

[0080] The difference between the second embodiment and the first embodiment is that the reference signal port information adopts the concatenation of the reference signal port bitmaps of the CSI-RS configuration of all the port numbers. For example, according to Table 1, there are 32 CSI-RS configurations for 1 antenna port, 32 CSI-RS configurations for 2 antenna ports, 16 CSI-RS configurations for 4 antenna ports, and 8 antenna ports CSI-RS configurations There are 8. Thus, a total of 88 (=32+32+16+8) bits of concatenated bitmaps b0b1b2b3b4b5b6b7....b31b32b33b34b35b36b37b38b39....b63b64b65...b79b80b81...b87 can be used. b0~b31 indicate the CSI-RS of 1 antenna port, b32~b63 indicate the CSI-RS of 2 antenna ports, b64~b79 indicate the CSI-RS of 4 antenna ports, b80~b87 indicate 8 CSI-RS of the antenna port. Each bit of the bitmap indicates whether a path loss measurement is performed for the corresponding antenna port. For example, bit 1 indicates that path loss measurement...

Embodiment 3

[0084] Embodiment 3 may use the indication method and path loss measurement method of Embodiment 1 and Embodiment 2, and the difference is that the reference signal port information in Embodiment 3 may further include an identification bit. The identification bit represents the role of the reference signal port information, and the UE performs measurement operations according to the identification bit.

[0085] For example, it is assumed that the identification bit 1 indicates that the path loss measurement is performed on the corresponding antenna port, and the identification bit 0 indicates that the reference signal port information is used for the CSI measurement. When the identification bit is 0, the UE measures the channel state information on the antenna port indicated by the reference signal port information, such as precoding indication (PMI, Precoding Matrix Index), rank indication (RI, Rank Index), channel quality information ( CQI, Channel Quality Information), etc....

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Abstract

Embodiments of the present invention provide a method for uplink power control, user equipment and a base station. The method includes: receiving channel state information reference signal CSI-RS configuration information from a base station, where the CSI-RS configuration information includes reference signal port information and reference signal power information; measuring uplink power control based on the CSI-RS configuration information road damage. The embodiment of the present invention uses CSI-RS for path loss measurement. Unlike public CRS, CSI-RS can be targeted at a specific base station, so path loss measurement can be performed for the target base station for uplink transmission, so that the path loss compensation is consistent with the actual path loss match, thereby improving the performance of uplink power control.

Description

technical field [0001] Embodiments of the present invention relate to the field of communications technologies, and more particularly, to a method, user equipment, and base station for uplink power control. Background technique [0002] In the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project), four scenarios of coordinated multi-point transmission (CoMP, Coordinated Multi-Point) are defined, of which the fourth scenario (scenario 4) is in a macro station. Transmission points in the area including Macro Site and Remote Radio Head (RRH, RemoteRadio Head) all share the same Cell IDentity, this architecture is also called Distributed Antenna System (DAS, Distributed Antenna System) ). [0003] In the DAS system, in order to make the received power of different user equipments (UE, User Equipment) reach the base station (eNB, evolvedNode B) roughly at the same level, and to avoid the interference between users due to the near-far effect, the UE is usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/24H04L1/06
CPCH04W52/146H04L5/0051H04L5/0023H04W52/242H04W52/245H04W52/40H04W52/325H04W72/23H04L5/0035H04W88/085
Inventor 刘昆鹏
Owner HUAWEI TECH CO LTD