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A method and device for sending an uplink signal

A signal transmission and signal technology, applied in the field of uplink signal transmission methods and devices, can solve problems such as user interference in adjacent cells, inaccurate estimation of signal transmission power, and influence on uplink signal reception.

Active Publication Date: 2018-02-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a distributed multi-antenna system or an uplink coordinated multi-point transmission (Uplink Coordinate multi-point transmission, ULCoMP) system, since the sending node and the receiving node of the uplink and downlink signals on the UE side may be inconsistent, when the uplink and downlink signals on the UE side are sent When the node is inconsistent with the receiving node, there will be a large difference between the PL value estimated from the reference signal sent by the downlink sending node and the actual PL value between the uplink receiving node and the UE. Estimating the transmission power of the UE-side signal on the uplink will cause inaccurate estimation of the UE-side signal transmission power, which will affect the reception of the UE's uplink signal and cause interference to users in adjacent cells.

Method used

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  • A method and device for sending an uplink signal
  • A method and device for sending an uplink signal
  • A method and device for sending an uplink signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Here, the first embodiment is based on a coordinated multi-point system or a single-antenna or multi-antenna system that only introduces CSI-RS;

Embodiment 1-1

[0092] In Embodiment 1-1, the predefined information includes CSI-RS and signal type, and the uplink path loss determined according to the predefined information is: the path loss value measured from the same fixed CSI-RS port is used as PUCCH, PUSCH And the estimated value of the SRS uplink path loss; the fixed CSI-RS port can be any one of port 15 to port 22 or a fixed one, such as port 15.

[0093] For ease of description, Embodiment 1-1 only takes PUSCH as an example, and the calculation formula of its channel transmit power can be:

[0094]

[0095] Where parameter i represents subframe i; j is a high-level configuration parameter, with values ​​0, 1, 2; P CMAX, c (i) is the maximum allowable transmit power on this carrier; M PUSCH, c (i) The size of the PUSCH resource allocated on subframe i on this carrier, represented by RB; P O_PUSCH, c (j) Represents the UE's target transmit power when the channel transmission requirements are met without considering the influence of pa...

Embodiment 1-2

[0098] In Embodiment 1-2, the predefined information includes CSI-RS and signal type, and the uplink path loss determined according to the predefined information is: the path loss values ​​measured from the same CSI-RS port are used as PUCCH, PUSCH and The estimated value of the SRS uplink path loss, where the CSI-RS port may be port 15 configured through higher layer signaling.

[0099] For ease of description, embodiment 1-2 only takes PUSCH as an example, and the calculation formula of its channel transmit power can be:

[0100]

[0101] Among them, parameter i represents subframe i; j is a high-level configuration parameter with values ​​of 0, 1, 2; P CMAX, c (i) is the maximum allowable transmit power on this carrier; M PUSCH, c (i) is the size of the PUSCH resource allocated on subframe i on this carrier, represented by RB; P O_PUSCH, c (j) Represents the UE's target transmit power when the channel transmission requirements are met without considering the influence of path ...

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Abstract

Provided is an uplink signal transmission method, the method comprising: determining the uplink pathloss according to predefined information; obtaining the transmission power of the uplink signal according to the determined uplink pathloss, and transmitting the uplink signal according to the transmission power. Also provided is an uplink signal transmission device. The uplink pathloss is determined in conjunction with the predefined information, and the uplink signal power is obtained according to the determined uplink pathloss and the uplink signal is transmitted, therefore fully satisfying different requirements for uplink channel transmission power in different application situations, and the CSI-RS can be further utilized to determine the uplink pathloss, thus enhancing open loop power control capability, and achieving the objective of accurate uplink channel control.

Description

Technical field [0001] The present invention relates to the field of mobile communication, in particular to an uplink signal sending method and device. Background technique [0002] The uplink physical channels of the Long Term Evolution (LTE) system include Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (Physical Uplink Control Channel). , PUCCH). The uplink of LTE adopts single-carrier Orthogonal Frequency Division Multiplexing (OFDM) technology, and reference signals and data are multiplexed together through Time Division Multiplex (TDM). The uplink reference signal includes a demodulation reference signal (Demodulation Reference Signal, DM-RS) and a measurement reference signal (Sounding Reference Signal, SRS). [0003] Because LTE's uplink uses Single Carrier-Frequency Division Multiple Access (SC-FDMA) technology, the uplink signals of different user equipment (UE) in a cell are orthogonal to each other, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/18
CPCH04W52/242
Inventor 任璐戴博林志嵘夏树强
Owner ZTE CORP
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