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A special subframe configuration method in a TDD LTE system

A technology of special subframe and configuration method, applied in the field of configuration of special subframe

Inactive Publication Date: 2017-05-03
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the RAN1 82 meeting, the sub-topic of FD-MIMO passed the conclusion of increasing the number of symbols in UpPTS for sending SRS, but how to increase the number of symbols in UpPTS, and whether it is necessary to introduce new special subframe configurations, etc. None of the problems are resolved

Method used

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  • A special subframe configuration method in a TDD LTE system
  • A special subframe configuration method in a TDD LTE system
  • A special subframe configuration method in a TDD LTE system

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Add special subframe configurations with UpPTS symbol lengths 3 and 4. Keep the existing DwPTS length unchanged and shorten the GP length to obtain more special subframe configurations of UpPTS symbols.

[0044] Such as Figure 4 As shown, 7 special subframe configurations are added to the normal downlink CP, and some of the 7 configurations can be selected to be used; 5 special subframe configurations are added to the extended CP, and some of the 5 configurations can be selected to be used.

[0045] When the uplink UpPTS is 3symbol, the following special subframe configurations are added. The UpPTS length of the uplink normal CP is 6592·T s , the UpPTS length of the uplink extended CP is 7680·T s :

[0046] When the downlink normal CP is configured with 10, the length of DwPTS is 6592·T s , equivalent to 3symbol;

[0047] Configuring 11 when the downlink normal CP indicates that the length of DwPTS is 19760·T s , equivalent to 9symbol;

[0048] When the downlink n...

Embodiment 2

[0060] Embodiment 2: Add special subframe configurations with UpPTS symbol lengths of 3 and 4. Reduce the DwPTS length and keep the GP length unchanged to obtain more special subframe configurations of UpPTS symbols.

[0061] Such as Figure 6 As shown, 8 special subframe configurations are added to the normal downlink CP, and some of the 8 configurations can be selected to be used. Six special subframe configurations are added to the extended CP, and some of the six configurations can be selected to be used.

Embodiment 3

[0062] Embodiment 3: Add an RRC configuration signaling, which may be called TDD-Config-v13, to realize the configuration of the newly added special subframe pattern in the above embodiment. If all the special subframe patterns of Example 1 are selected, the RRC can be designed as follows:

[0063] TDD-Config-v13::=SEQUENCE{

[0064] specialSubframePatterns-v13 ENUMERATED{ssp10,ssp11,ssp12,ssp13,ssp14,ssp15,ssp16,ssp8,,ssp9}

[0065]}

[0066] The above-mentioned embodiments propose two ways of adding special subframes, one is to maintain DwTPS to reduce the number of symbols of GP; the other is to maintain GP to reduce the number of symbols of DwTPS, and provide several special subframes in DwTPS, GP length configuration. On the basis of maintaining the existing special subframe design, a small amount of modification can be made to realize UpPTS with more symbol lengths, and it will not cause serious interference with the original TD-SCDMA.

[0067] Those of ordinary skill...

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Abstract

The invention brings forward a special subframe configuration method in a TDD LTE system. A special subframe comprises a special time slot DwPTS, GP and UpPTS, wherein the maximum number of symbols of the special time slot UpPTS is 4 or 6; the special time slot DwPTS length maintains an existing design unchanged; the special time slot GP length is correspondingly shortened; or the special time slot GP length maintains the existing design unchanged; and the special time slot DwPTS length is correspondingly shortened. According to the invention, a small number of modifications can be made on the basis of keeping the existing special subframe design to realize the UpPTS with more symbol lengths without causing serious interference with an original TD-SCDMA.

Description

technical field [0001] The invention relates to a method for configuring a special subframe in a TDD LTE system. Background technique [0002] In the existing TDD LTE system, a total of 7 uplink and downlink subframe configurations are supported, such as figure 1 shown. Where "D" represents a downlink subframe, "U" represents an uplink subframe, and "S" represents a special subframe. figure 2 It is a schematic diagram of one of the frame structures. The special subframe contains three special time slots DwPTS, GP and UpPTS. The DwPTS in the special subframe is reserved as the downlink transmission area, the UpPTS is reserved as the uplink transmission area, and the GP is the guard interval. The total length of DwPTS, GP and UpPTS is 1ms, and the length of DwPTS and UpPTS can be configured. The specific configuration of each special time slot in a special subframe is as follows: image 3 . GP does not transmit any signal, providing protection between uplink and downli...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04L5/00
CPCH04L5/0053H04W72/0446H04W72/23
Inventor 周欢孙鹏
Owner BEIJING XINWEI TELECOM TECH
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