MCS-grade determination method and equipment

A technology for determining method and level, which is applied in the direction of link quality-based transmission modification, transmission system, modulated carrier system, etc., and can solve problems such as the inability to guarantee the PUSCH reception performance and the low reception power of a single PRB of the base station equipment.

Active Publication Date: 2015-12-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is no limit to the number of PRBs scheduled for PUSCH, and the reception performance of PUSCH at the cell edge cannot be guaranteed
When the user is at the edge of the cell, the path loss is large, and the uplink transmission power is limited, the scheduling MCS level wil

Method used

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  • MCS-grade determination method and equipment
  • MCS-grade determination method and equipment
  • MCS-grade determination method and equipment

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Embodiment 1

[0057] Aiming at the problems existing in the prior art, Embodiment 1 of the present invention provides a method for determining an MCS level, so as to propose a method for accurately estimating the uplink scheduling MCS and the corresponding number of PRBs. Before describing the specific technical solutions of the embodiments of the present invention, the following related parameters may be defined. PRB_MAX: The maximum number of PRBs that can be scheduled by the base station equipment. The recommended value is 96. PH(i): PHR (PowerHeadroom Reporting, power headroom reporting) reported by the terminal device at time i. m PUSCH (i): The number of PRBs of the PUSCH of the PHR information of the terminal equipment carried at time i. m SRS : the bandwidth of the SRS (that is, the number of PRBs). P SRS_OFFSET : The power offset of the SRS, which is a configuration parameter. PRB_MAX_noLimt: The transmit power of the terminal device is P CMAX (maximum transmit power) the nu...

Embodiment 2

[0084] Based on the same inventive concept as the above method, an embodiment of the present invention also provides a base station device, such as figure 2 As shown, the base station equipment specifically includes:

[0085] The first calculation module 11 is used for k 0 The first signal-to-interference-plus-noise ratio SINR measured by the SRS signal at the moment, and calculate the second SINR of the physical uplink shared channel PUSCH signal;

[0086] A determining module 12, configured to determine the MCS level of the first modulation and coding scheme according to the second SINR;

[0087] The second calculation module 13 is configured to calculate the number of PRBs actually scheduled and the second MCS level actually used according to the first MCS level and the amount of data that the user actually needs to transmit.

[0088] The first calculation module 11 is specifically configured to calculate the second SINR of the PUSCH signal according to the first SINR, t...

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Abstract

The invention discloses an MCS-grade determination method and equipment. The method comprises steps that, second SINR of a PUSCH signal is calculated by the base station equipment according to first SINR obtained through SRS signal measurement at the k0 moment; the first MSC grade is determined by the base station equipment according to the second SINR; the really scheduled PRB quantity and the really-used second MCS grade are calculated by the base station equipment according to the first MCS grade and really-needed user transmission data quantity. Through the method, the MCS grade corresponding to PUSCH calling certain PRB quantity can be precisely calculated, the MCS grade of the PUSCH is made to be in matching with the real SINR of the PUSCH channel, PUSCH reception performance is effectively guaranteed, so uplink transmission efficiency of an LTE system is improved, uplink transmission efficiency of district edge users is facilitated to improve, PUSCH transmission performance of the district edge users with large path loss is guaranteed, and the uplink business rate of the edge users is facilitated to improve.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for determining an MCS level. Background technique [0002] In the LTE (LongTermEvolution, long-term evolution) system, the uplink adaptive technology is: the base station equipment estimates the user's uplink PUSCH (PhysicalUplinkSharedChannel, physical uplink shared channel) channel quality according to the user's uplink SRS (SoundingReferenceSignal, sounding reference signal) signal quality, and then When scheduling the PUSCH, select an MCS (Modulation and Coding Style, Modulation and Coding Style) that matches the channel quality of the user. Specifically, the base station equipment estimates the user's uplink channel quality SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio) according to the user's uplink SRS signal, and approximately considers that the SINR obtained by SRS measurement will be equal t...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04W72/12
CPCH04W72/12H04L1/0005H04L1/0011H04L1/20H04L5/0064H04L5/0046H04L5/0051H04L27/0012H04L27/2602H04B7/0857H04L5/0044
Inventor 孔健汪玲苏进喜
Owner DATANG MOBILE COMM EQUIP CO LTD
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