Parameter determining method and parameter determining device in link self-adaptive technology

A technology of link adaptation and parameter determination, applied in the field of communication, can solve problems such as large SINR error, improve scheduling efficiency and transmission efficiency, improve cell average and edge, and avoid retransmission.

Active Publication Date: 2017-02-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for determining parameters in the link adaptive technology, which are used to solve the problem that if the traditional LTE system link adaptive technology is used in the PDMA technology to directly estimate the SINR through pilot measurement, it will lead to The problem of large SINR error

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  • Parameter determining method and parameter determining device in link self-adaptive technology
  • Parameter determining method and parameter determining device in link self-adaptive technology
  • Parameter determining method and parameter determining device in link self-adaptive technology

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Embodiment 1

[0108] Embodiment 1. When the PDMA technology is applied to the LTE downlink, the link adaptation is realized. The interaction process between the base station and the user equipment is as follows: Figure 4 Shown:

[0109] The base station side sends CRS or DRS for measurement by the terminal side;

[0110] The terminal side obtains the SINR of the pilot subcarrier level (that is, the third SINR) through CRS or DRS measurement, and then uses the EESM or MI-ESM algorithm to map the SINR of the pilot subcarrier level to the SINR of the user level (that is, the first SINR ), and map the user-level SINR into a CQI level and report it to the base station side; in addition, the terminal side feeds back the ACK / NACK information obtained from service detection to the base station side.

[0111] For the newly transmitted user, after the base station side obtains the CQI information reported by the terminal side, the SINR (ie, the first SINR) transmitted by a single user is mapped; th...

Embodiment 2

[0113] Embodiment 2. When the PDMA technology is applied to the LTE uplink, the link adaptation is realized. The interaction process between the base station and the user equipment is as follows: Figure 5 Shown:

[0114] The base station side obtains the SINR of the pilot subcarrier level (that is, the third SINR) through the SRS measurement sent by the terminal side; - SINR); then utilize the channel capacity to estimate the SINR (i.e. the second SINR) after the PDMA multi-user pairing, and at the same time, the base station side corrects the SINR after the pairing according to the ACK / NACK information obtained by self-detection; finally, the corrected The SINR is mapped to the MCS level, and the MCS level is notified to the terminal side through the control channel, so that the terminal side completes service transmission.

[0115] The processing flow of the above method can be realized by a software program, and the software program can be stored in a storage medium, and ...

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Abstract

The invention discloses a parameter determining method and a parameter determining device in link self-adaptive technology. A problem of large error of acquired SINR caused by conventional LTE system link self-adaptive technology used in PDMA technology is solved. The parameter determining method comprises steps that network equipment is used to acquire a first SINR of user equipment, and the first SINR is the SINR acquired based on reference signal measurement; the channel capacity of the user equipment is determined according to the first SINR of the user equipment; a second SINR after the matching of the user equipment is determined according to the channel capacity of the user equipment. According to the channel capacity of the user equipment, the second SINR after the matching of the user equipment is determined, and then an MCS level corresponding to the user equipment after the matching is further determined, and therefore scheduling efficiency and transmission efficiency are improved, retransmission is prevented, detected BLER is kept at a low level, and therefore cell average and edge user frequency spectrum efficiency is improved, and cell access user number is increased.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for determining parameters in link self-adaptation technology. Background technique [0002] Link adaptation means that the base station or user terminal adaptively adjusts system transmission parameters according to the currently acquired channel information to adapt to the impact of current channel changes. Link adaptation in a Long Term Evolution (LTE) system mainly includes Adaptive Modulation and Coding (Adaptive Modulation and Coding, AMC) and Hybrid Automatic RepeatreQuest (HARQ). [0003] Pattern division multiple access (Patten Division Multiple Access, PDMA) technology is a new type of non-orthogonal multiple access technology. Coding and modulation joint optimization scheme realizes multi-dimensional non-orthogonal signal superposition transmission in time domain, frequency domain, code domain, power domain and air domain, and can ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/18H04L1/00
CPCH04L1/0026H04W24/02H04W24/08H04W28/18
Inventor 康绍莉孙晓东宋扬任斌贺媛
Owner DATANG MOBILE COMM EQUIP CO LTD
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