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Transmission method and synchronization method for synchronization signals in communication system

A synchronization signal and communication system technology, applied in the direction of synchronization device, transmission system, wireless communication, etc., can solve the problems of LTECP length waste, communication node coverage reduction, etc.

Active Publication Date: 2017-02-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in UDN, the coverage of communication nodes is greatly reduced (for example, the coverage is usually tens of meters), so there is a huge waste of traditional LTE CP length

Method used

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  • Transmission method and synchronization method for synchronization signals in communication system
  • Transmission method and synchronization method for synchronization signals in communication system
  • Transmission method and synchronization method for synchronization signals in communication system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0100] Embodiment 1. A method for sending a synchronization signal in a communication system, such as figure 2 shown, including:

[0101] S110, the communication node generates a wireless frame; the wireless frame includes N subframes, each subframe includes M OFDM symbols and P synchronization signals; each of the OFDM symbols includes a first cyclic prefix and an OFDM The symbol data part, wherein the first cyclic prefix is ​​the same as the data signal of the corresponding length at the end of the OFDM symbol data part; N, M and P are positive integers, 0≤P≤M; the synchronization signal includes a second cyclic prefix and sync signal data part;

[0102] S120. The communication node sends the wireless frame.

[0103] In this embodiment, the sum of the lengths of the first cyclic prefix and the synchronization signal may be, but not limited to, equal to the length of the cyclic prefix (regular or extended cyclic prefix) in the existing system.

[0104] In this embodiment,...

example 1

[0118] Example 1, a method for sending a synchronization signal in a communication system, comprising:

[0119] The communication node sends signals according to the wireless frame;

[0120] Such as Figure 4 As shown, the radio frame is composed of N subframes, and each subframe is composed of M OFDM symbols and P synchronization signals;

[0121] The OFDM symbol is composed of CP1 and OFDM symbol data part, wherein CP1 is the same as the data signal at the end of the OFDM symbol data part;

[0122] The synchronization signal is composed of CP2 and a data part of the synchronization signal, wherein CP2 is the same as a data signal at the end of the data part of the synchronization signal;

[0123] Among them, 0≤P≤M;

[0124] The sum of the length of the CP1 and CP2 and the synchronization signal data part is 144Ts, or 160Ts, or 512Ts, wherein Ts=1 / 30.72us (microsecond), and 144Ts and 160Ts correspond to the conventional CP of the existing LTE system, 512Ts Corresponding t...

example 2

[0128] Example 2, a method for sending a synchronization signal in a communication system, comprising:

[0129] The communication node sends signals according to the wireless frame;

[0130] Such as Figure 5 As shown, the radio frame is composed of N subframes, and each subframe is composed of M OFDM symbols, P synchronization signals and GP;

[0131] The OFDM symbol is composed of CP1 and OFDM symbol data part, wherein CP1 is the same as the data signal at the end of the OFDM symbol data part;

[0132] The synchronization signal is composed of CP2 and a data part of the synchronization signal, wherein CP2 is the same as a data signal at the end of the data part of the synchronization signal;

[0133] The GP includes GP1 and GP2; GP1 is located before the synchronization signal, providing uplink and downlink switching protection for the previous OFDM symbol data and the current synchronization signal data; GP2 is located after the synchronization signal and before CP1, and ...

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Abstract

A transmission method and synchronization method for synchronization signals in a communication system are provided. The transmission method comprises that a communication node generates a radio frame; the radio frame includes N sub frames, each sub frame includes M orthogonal frequency division multiplexing (OFDM) symbols and P synchronization signals, each of said OFDM symbols includes a first cyclic prefix and an OFDM symbol data portion, the first cyclic prefix is the same as a data signal with a corresponding length at the end of the OFDM symbol data portion, N, M and P are positive integers, P is greater than or equal to 0 but less than or equal to M, each synchronization signal includes a second cyclic prefix and a synchronization signal data portion; and the communication node transmits the radio frame. The methods can solve a problem of synchronization and / or discovery between communication nodes.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for sending a synchronization signal in a communication system, a synchronization method and a device. Background technique [0002] UDN (Ultra-Dense Network, ultra-dense network) is one of the key technologies of 5G (5th Generation, fifth generation) mobile communication. The deployment of TP (Transmission Point, transmission node) improves the coverage and increases the data service transmission rate to meet the 1000 times data service volume demand of future 5G mobile communications. In the UDN network, the synchronization / discovery problem between communication nodes (TP or terminal) needs to be solved. [0003] At present, there are three methods of synchronization between TPs: one is through satellite navigation synchronization; the other is through ideal wired backhaul, using the IEEE (Institute of Electrical and Electronics Engineers, Institute of...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04L27/26
CPCH04L5/0053H04L27/2602H04L27/2607H04L27/2613H04L27/2655H04L27/2692H04W56/003H04W56/001H04L27/2603H04L27/2656H04W72/0446
Inventor 陆海涛郝鹏
Owner ZTE CORP
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