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High order modulation and low order modulation compatible transmission method and device

A technology of high-order modulation and low-order modulation, applied in the field of communication, can solve the problems of not considering compatibility issues, unable to demodulate data, and base stations cannot be supported at the same time

Active Publication Date: 2015-05-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, when the base station side provides services for UEs that support 256QAM, the compatibility issue for UEs that do not support 256QAM is not considered, so that the base station in the prior art cannot provide services for UEs that support 256QAM modulation and UEs that do not support 256QAM modulation at the same time. 256QAM modulated UE services are not compatible, resulting in one of the UEs being unable to demodulate the data sent by the base station

Method used

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  • High order modulation and low order modulation compatible transmission method and device
  • High order modulation and low order modulation compatible transmission method and device
  • High order modulation and low order modulation compatible transmission method and device

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Embodiment 1

[0119] An embodiment of the present invention provides a transmission method compatible with high-order modulation and low-order modulation, such as figure 2 As shown, the high-order modulation mentioned in this method includes 256 quadrature amplitude modulation QAM, and the low-order modulation includes at least one of 64QAM, 16QAM and quadrature phase shift keying QPSK. A first high-order modulation mapping table for high-order modulation, and a first low-order modulation mapping table supporting the low-order modulation, the method includes:

[0120] Step A1, the base station receives capability level information sent by the user equipment, where the capability level information is used to indicate that the user equipment supports the high-order modulation or supports the low-order modulation;

[0121] Wherein, the capability level information may be sent to the eNB during the UE network access phase, but this embodiment does not limit the capability level information to ...

Embodiment 2

[0147] An embodiment of the present invention provides a transmission method for user equipment, such as image 3 As shown, the method includes:

[0148] Step B1, the user equipment sends capability level information to the base station, the capability level information is used to indicate that the user equipment supports high-order modulation or low-order modulation; wherein the high-order modulation includes 256 quadrature amplitude modulation QAM, The low-order modulation includes at least one of 64QAM, 16QAM, and quadrature phase-shift keying QPSK, and the base station stores a first high-order modulation mapping table supporting the high-order modulation, and a first high-order modulation mapping table supporting the low-order modulation. a low-order modulation mapping table;

[0149] Step B2, the user equipment receives the modulation and coding scheme index sent by the base station, the modulation and coding scheme index is determined by the base station according to a...

Embodiment 3

[0174] An embodiment of the present invention provides a transmission method compatible with high-order modulation and low-order modulation. The method is based on Embodiments 1 and 2 and expresses a solution for interaction between various devices. Such as Figure 4 As shown, the method includes:

[0175] In step 101, the UE sends capability level information to the eNB, the capability level information indicating that the UE supports or does not support 256QAM.

[0176] Wherein, the UE may send the capability level information during the UE network access phase, but this embodiment does not limit the timing of sending the capability level information to the network access phase, and may also be sent during other processes.

[0177] Step 102, UE sends channel quality information to eNB. Wherein, the channel quality information may specifically be a channel quality indicator (CQI, Channel Quality Indicator).

[0178] Step 103, the eNB receives the capability level informati...

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Abstract

Disclosed in an embodiment of the present invention are a transmitting method compatible with high order modulation and low order modulation, and a device. A base station stores a first high order modulation mapping table supporting high order modulation and a first low order modulation mapping table supporting low order modulation, and receives capability level information sent by a user equipment (UE); according to the capability level information sent by the UE, the base station determines a first modulation mapping table used to communicate with the UE; according to the modulation mapping table, the base station determines an index of modulation code schedule (IMCS) used by the UE to determine a modulation code schedule (MCS); and the base station sends the IMCS to the UE. The technical solution provided in the embodiment enables a base station to compatibly provide service for the UE supporting or not supporting 256 quadrature amplitude modulation (QAM), thus solving the problem in the prior art of base station incompatibility.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a transmission method and device compatible with high-order modulation and low-order modulation. Background technique [0002] High-order modulation technology is a technology introduced to increase the amount of transmitted data without increasing the transmission bandwidth. At present, under the long-term evolution (LTE, Long Time Evolution) technology, the highest order of the usual high-order modulation technology is 64-order quadrature amplitude modulation (ie, 64QAM, Quadrature Amplitude Modulation). With the development of technology, 256QAM has a theoretical gain of 33% compared with the current 64QAM, because in the 256QAM scenario, each resource element (RE, Resource Element) can carry 8 bits (bit) of data, compared with In other words, in the 64QAM scenario, each RE can only carry 6 bits of data. Therefore, in the same RE scenario, the amount of data th...

Claims

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Application Information

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IPC IPC(8): H04L27/36
CPCH04L27/36H04L1/0003H04L1/0009H04L1/0016H04L1/0026H04L27/3488H04L27/362H04W88/08
Inventor 张怀治陈卫民吴秀峰王情
Owner HUAWEI TECH CO LTD
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