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Downlink transmission method and system for unauthorized spectrum

An unlicensed spectrum and transmission method technology, applied in the field of downlink transmission methods and systems, to achieve the effect of improving throughput

Inactive Publication Date: 2017-06-13
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiments of the present invention provide a downlink transmission method and system for unlicensed spectrum, to solve the technical problem of effectively performing downlink transmission on some subframes, and indirectly improve the throughput of the communication system

Method used

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  • Downlink transmission method and system for unauthorized spectrum
  • Downlink transmission method and system for unauthorized spectrum

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Experimental program
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Embodiment 1

[0030] Such as Figure 1a As shown, it is a downlink transmission method for unlicensed spectrum provided by an embodiment of the present invention. The method can be applied to a communication network using LAA technology. The method may include the following steps:

[0031] S110: According to the number of symbols of the partial subframe, the symbol division is sequentially performed from one end of the partial subframe.

[0032] In this embodiment, partial subframes refer to the length of which is less than or equal to 1 ms, that is, the length of partial subframes is less than or equal to the length of regular subframes. The number of symbols in some sub-frames can be based on the time unit T S To calculate, according to 3GPP Technical Specification (TS) 36.211 document, T S Desirable Second, the number X of symbols in a part of the subframe can be calculated according to the length T of the part of the subframe, namely If the number X of symbols in a part of the subframe is kn...

Embodiment 2

[0045] On the basis of Embodiment 1 of the present invention, this embodiment provides another downlink transmission method for unlicensed spectrum, such as Figure 2a As shown, the embodiment of the present invention can add step S100, step S150 and step S160 on the basis of the first embodiment.

[0046] S100. Align one end of a part of the subframe with one end of the regular subframe, where the length of the part of the subframe is less than or equal to the length of the regular subframe.

[0047] Such as Figure 1b , 1c As shown, aligning one end of a part of the subframe with an end of a regular subframe can align the start of the part of the subframe with the edge of the regular subframe, or align the end of the part of the subframe with the edge of the regular subframe.

[0048] S150. Set the first M matching positions of the time-frequency grid as the control area, where M is 1, 2, 3, or 4.

[0049] Please refer to Example 1, such as Figure 1b In the first partial subframe st...

Embodiment 3

[0063] Based on the technical solutions recorded in the foregoing method embodiments of the present invention, such as image 3 As shown, it is a downlink transmission system 300 for unlicensed spectrum provided by an embodiment of the present invention. The downlink transmission system 300 includes: a symbol division unit 310, a schedulable resource block size calculation unit 320, and a time-frequency grid calculation unit 330 And the downlink transmission unit 340. among them,

[0064] The symbol dividing unit 310 is configured to divide the symbols sequentially from one end of the partial subframe according to the number of symbols in the partial subframe;

[0065] The schedulable resource block size calculation unit 320 is configured to calculate the schedulable resource block size of some subframes according to the number of symbols and the pre-allocated resource block size;

[0066] The time-frequency grid calculation unit 330 is configured to calculate the time-frequency gri...

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Abstract

The invention discloses a downlink transmission method and system for an unauthorized spectrum. The downlink transmission method comprises the following steps: sequentially performing symbol division from one end of each of partial subframes according to the number of symbols of the partial subframes; calculating the sizes of schedulable resource blocks of the partial subframes according to the number of the symbols and the sizes of pre-allocated resource blocks; calculating the time-frequency grid of downlink transmission according to the sizes of the schedulable resource blocks and the number of the symbols; and mapping the PDSCH resource and downlink reference signals to the time-frequency grid to perform downlink transmission according to a preset mapping rule, wherein the mapping positions of the PDSCH resource and the downlink reference signals are not overlapped. By adopting the downlink transmission method and system disclosed by the invention, the technical problem of effectively performing downlink transmission on the partial subframes can be solved, and the throughput of communication systems can be increased.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a downlink transmission method and system for unlicensed spectrum. Background technique [0002] The Third Generation Partnership Program (3 rd The Generation Partnership Project (3GPP) introduced the Licensed-Assisted Access (LAA) technology in the Rel-13 version, that is, carrying mobile communication services on an unlicensed spectrum, such as 5GHz unlicensed spectrum. In the unlicensed spectrum, wireless fidelity (WiFi), Bluetooth, radar and medical systems are currently in use. Due to the diversity and complexity of the systems on the unlicensed spectrum, to solve the coexistence problem between different systems, a basic principle is to require different systems to fairly occupy the unlicensed spectrum. Therefore, a technical solution is needed to solve the transmission collision problem between LAA systems on unlicensed spectrum, or between LAA and WiFi systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12
CPCH04W72/0446H04W72/1273H04W72/53H04W72/535
Inventor 周欢孙鹏
Owner BEIJING XINWEI TELECOM TECH
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