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Method and device in wireless communication

A wireless signal and antenna port technology, applied in the TDD field, can solve problems such as the decrease of transmission efficiency

Active Publication Date: 2020-01-31
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a solution to the problem of decreased transmission efficiency caused by excessive use of GP

Method used

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  • Method and device in wireless communication
  • Method and device in wireless communication
  • Method and device in wireless communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Embodiment 1 illustrates the flow chart of downlink transmission, as attached figure 1 shown. attached figure 1 In , the base station N1 is the maintenance base station of the serving cell of the UE U2. attached figure 1 , the steps in box F1 are optional.

[0113] for base station N1 , sending the first signaling in step S11; sending the first wireless signal in step S12; sending the second wireless signal in step S13.

[0114] for UE U2 , receiving the first signaling in step S21; receiving the first wireless signal in step S22; receiving the second wireless signal in step S23.

[0115] In Embodiment 1, the first signaling is physical layer signaling. A first block of bits is used to generate the first wireless signal and the second wireless signal. The receiving time window of the first wireless signal is before the receiving time window of the second wireless signal. The first wireless signal adopts a first modulation and coding scheme, and the second wir...

Embodiment 2

[0126] Embodiment 2 illustrates the timing diagram of the first wireless signal and the second wireless signal, as shown in the attached figure 2 shown. attached figure 2 In , the slash marks the first wireless signal, and the crossed line marks the second wireless signal. Wherein, the first time interval is optional.

[0127] attached figure 2 Among them, the first time window is the sending time window of the first wireless signal, the second time window is the sending time window of the second wireless signal, the third time window is the receiving time window of the second wireless signal, and the fourth time window is the receiving time window of the second wireless signal. 2. The receiving time window of the wireless signal. attached figure 2 The propagation delay in is the time required for the radio signal to travel from the base station to the UE.

[0128]As a sub-embodiment 1 of Embodiment 2, the receiving time window of the first wireless signal and the re...

Embodiment 3

[0132] Embodiment 3 illustrates a schematic diagram of the downlink / uplink switching point on the base station side, as shown in the attached image 3 shown. attached image 3 In , the time domain resources marked by backslashes are reserved for downlink transmission, the time domain resources marked by horizontal lines are reserved for uplink transmission, and the time domain resources marked by thick lines are used for the transmission / reception switching of the radio frequency module of the base station.

[0133] In Embodiment 3, the time-domain resources reserved for the downlink / uplink switching point (such as the thick-line frame mark) are much smaller than the GP in the traditional TDD system, which significantly improves the transmission efficiency.

[0134] As a sub-embodiment 1 of Embodiment 3, the time-domain resource reserved for the downlink / uplink switching point (as indicated by a thick line box) is less than 1 microsecond.

[0135] As a sub-embodiment 2 of Em...

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Abstract

The invention discloses a method and device in wireless communication. The UE first receives the first wireless signal; and then receives the second wireless signal. Wherein, the first bit block is used to generate the first wireless signal and the second wireless signal. The time interval between the end time of the reception time window of the first wireless signal and the start time of the reception time window of the second wireless signal is less than the duration of one OFDM symbol. The reception time window of the first wireless signal is before the reception time window of the second wireless signal. The first wireless signal adopts a first modulation and coding scheme, and the first wireless signal adopts a second modulation and coding scheme. The transmission efficiency corresponding to the second modulation and coding scheme is lower than the transmission efficiency corresponding to the first modulation and coding scheme. The present invention can avoid the decline of TDD transmission efficiency caused by excessively configuring GP.

Description

technical field [0001] The present invention relates to a transmission scheme in a wireless communication system, in particular to a TDD (Time Division Duplex, Time Division Duplex) method and device. Background technique [0002] For TDD transmission, a GP (Guard Period, guard interval) is usually configured between the time resources reserved for downlink transmission and the transmission resources reserved for uplink transmission. The GP is used to overcome the impact of uplink wireless signals on downlink Interference with wireless signals. [0003] In the Latency Reduction (LR, delay reduction) topic in Release 14 of 3GPP (3rd Generation Partner Project, third generation partnership project), an important application purpose is low-latency communication. To meet the requirement of reducing delay, the traditional LTE subframe structure needs to be redesigned, and the system design based on sTTI (short Transport Time Interval, short transmission time interval) is being d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26H04B7/26
CPCH04B7/2643H04L5/0007H04L5/0053H04L27/2602
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD
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