Method and device for deciding uplink MCS level

A decision-making method and level technology, applied in electrical components, wireless communication, etc., can solve problems such as expiration or failure of ULMCS level information

Active Publication Date: 2017-04-05
CHINA MOBILE COMM GRP CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

The uplink (UL) resource scheduling method adopts the UL long-term scheduling mechanism, that is, the eNB schedules multiple UL subframes for the UE at a time, and the UE can compete for channel access opportunities on all or part of the scheduled UL subframes. Some such scheduling mechanisms only allow the eNB to determine in advance the UL MCS level used by the UE in subsequent UL transmissions, and notify the UE of this decision through UL DCI signaling, but this will result in the UL MCS level determined in advance Problems where information becomes outdated or invalid due to changes in the channel environment

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  • Method and device for deciding uplink MCS level
  • Method and device for deciding uplink MCS level
  • Method and device for deciding uplink MCS level

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Embodiment Construction

[0034] In the existing LTE technology, the eNB needs to decide in advance which UL MCS level the UE should use in the subsequent UL transmission for the UE, and inform the UE of this decision through UL DCI signaling. Note that the MCS level is related to short-term channel quality. Under the UL long-term scheduling mechanism, there may be a long time interval between when the UE receives the UL scheduling information (the subframe where the UL DCI is located) and when the UE actually obtains the transmission opportunity. At this time, the UL MCS indicated in the UL DCI The level information may no longer be suitable for the current channel environment, resulting in the expiration and failure of the pre-determined UL MCS level information due to changes in the channel environment. Based on this, propose following scheme of the present invention:

[0035] In the embodiment of the present invention, when the user equipment UE determines that the uplink UL transmission opportuni...

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Abstract

The invention discloses a method and device for deciding an uplink MCS level. The method includes the following steps: a user equipment (UE) determining the UL MCS level self-used in UL transmission, if determined that an uplink UL transmission opportunity is acquired, on the basis of the result of quality measurement of a UE-side channel or of the result of the quality measurement of the UE-side channel and at least one parameter alerted by a base station. The invention also discloses a device which realizes the method.

Description

technical field [0001] The present invention relates to uplink scheduling technology in the communication field, in particular to an uplink modulation and coding strategy (MCS) level decision-making method and equipment. Background technique [0002] It is known from the prior art that different operators will deploy their own Radio Access Technologies (RAT) systems on unlicensed frequency bands, such as WIFI systems and unlicensed spectrum LTE systems. In order to use unlicensed frequency bands in a fair and orderly manner, base stations and user equipment of each system need to follow a listen before talk (LBT) scheduling mechanism when transmitting services. The uplink (UL) resource scheduling method adopts the UL long-term scheduling mechanism, that is, the eNB schedules multiple UL subframes for the UE at a time, and the UE can compete for channel access opportunities on all or part of the scheduled UL subframes. Some such scheduling mechanisms only allow the eNB to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
CPCH04W24/08H04W72/1268
Inventor 柯颋陈卓童辉刘建军沈晓冬侯雪颖
Owner CHINA MOBILE COMM GRP CO LTD
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