A method and device for improving the coexistence capacity of td-lte and td-scdma adjacent frequency

A technology of TD-SCDMA and adjacent frequency coexistence, applied in electrical components, wireless communication, etc., can solve the problems of loss of system capacity, unfavorable system capacity and spectrum utilization, and increase, so as to achieve the effect of improving downlink capacity

Active Publication Date: 2016-01-20
CHINA MOBILE GRP BEIJING
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Problems solved by technology

[0009] However, when the TD-SCDMA time slot ratio is 2:4 or 5:1, TD-LTE adopts the subframe ratio of 3:1 and 1:3, and TD-LTE needs to set the special subframe as configuration 0, 5 , compared with solution (1), TD-LTE loses 18% more system capacity, which is not conducive to the improvement of system capacity and spectrum utilization

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  • A method and device for improving the coexistence capacity of td-lte and td-scdma adjacent frequency
  • A method and device for improving the coexistence capacity of td-lte and td-scdma adjacent frequency
  • A method and device for improving the coexistence capacity of td-lte and td-scdma adjacent frequency

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[0078] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0079] Core idea of ​​the present invention is according to the analysis to TD-SCDMA and TD-LTE time slot ratio scheme, obtains TD-SCDMA and TD-LTE adjacent frequency coexistence condition as:

[0080] 1. Based on the principle of keeping the design coverage distance of TD-SCDMA and TD-LTE basically the same, the guard interval of TD-SCDMA is not less than 0.075us, and the guard interval of TD-LTE is not less than 0.071us;

[0081] 2. Based on the principle that TD-SCDMAGP is unchanged and TD-LTEGP is variable, the uplink and downlink time of TD-LTE is shorter than the uplink and downlink time of TD-SCDMA;

[0082] 3. The UpPTS of TD-LTE occupies at least 1 OFDM sym...

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Abstract

The invention discloses a method and a device for increasing adjacent channel coexistence capacity of TD-LTE (time division-long term evolution) and TD-SCDMA (time division-synchronization code division multiple access). The method comprises the steps that uplink and downlink time slot allocation of the TD-LTE is obtained by computation; the maximum symbolic number of a DwPTS (Downlink Pilot Time Slot), namely a special time slot of a special subframe of the TD-LTE is obtained by computation; and a special time slot configuration scheme of the TD-LTE when an adjacent channel of the TD-SCDMA coexists with that of the TD-LTE is obtained by the computation according to the obtained maximum symbolic number of the DwPTS. According to the method and the device, downlink capacity of the TD-LTE can be increased by above 40% at most.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and a device for improving the co-existence capacity of adjacent frequencies of TD-LTE and TD-SCDMA. Background technique [0002] In the current communication coding technology, the wireless frame length of TD-LTE is 10ms, and each 10ms wireless frame includes two 5ms half-frames. Each half frame contains 8 time slots with a length of 0.5 ms and 3 special time slots: DwPTS, GP and UpPTS. The length of DwPTS and UpPTS is configurable, and the total length of DwPTS, GP and UpPTS is 1ms. LTE TDD also supports uplink and downlink switching point periods of 5ms and 10ms. Subframe 1 includes DwPTS, GP and UpPTS. When the switching period is 5ms, subframe 6 includes DwPTS, GP and UpPTS, and when switching period is 10ms, subframe 6 only includes DwPTS. All other subframes consist of two slots of equal length. GP is reserved for downlink to uplink handover. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
Inventor 赵伟盛凌志王文明张志敏石伟杜建凤李智伟赵新宁姜欣吴茜
Owner CHINA MOBILE GRP BEIJING
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