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Mobile communication system and terminal direct unicast transmission control method

A mobile communication terminal and control method technology, applied in transmission systems, digital transmission systems, machine-to-machine/machine-type communication services, etc., can solve problems such as low reliability of secondary link signal transmission, and ensure transmission reliability. , the effect of increasing data rates, improving efficiency and security

Active Publication Date: 2018-05-04
CHINA ACADEMY OF INFORMATION & COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the present invention, the present invention will propose a mobile communication system and a terminal direct unicast transmission control method to solve the problem of low reliability of secondary link signal transmission at present.

Method used

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  • Mobile communication system and terminal direct unicast transmission control method
  • Mobile communication system and terminal direct unicast transmission control method
  • Mobile communication system and terminal direct unicast transmission control method

Examples

Experimental program
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Embodiment 1

[0034] figure 1 It is a flow chart of an embodiment of a method for controlling terminal direct unicast transmission of mobile communications, specifically including the following steps:

[0035] Step 11, the first terminal uses signaling resources to send the first type of secondary link control signaling, the first type of secondary link control signaling includes the first terminal identifier, the second terminal identifier, resource allocation identifier, modulation and coding logo;

[0036] Step 12. The first terminal sends the secondary link data signal according to the resource allocation identifier;

[0037] Step 13: The second terminal receives the first type of secondary link control signaling according to the signaling resource, and identifies the first terminal identifier, the second terminal identifier, the resource allocation identifier, and the modulation and coding identifier;

[0038] Step 14: The second terminal receives the secondary link data signal from ...

Embodiment 2

[0043] In this embodiment, the information included in the first type of secondary link control signaling described in the embodiment of the present invention is further optimized, and an example is given.

[0044] The first type of secondary link control signaling is used to schedule secondary link data signal channels, such as PSSCH (phasicalsidelink shared channel), and the specific information included is shown in Table 1.

[0045] Table 1. Information contained in the first type of secondary link control signaling

[0046]

[0047]

[0048] In Table 1, the second terminal identifier: used to indicate the identifier of the target terminal receiving data; resource allocation identifier: used to indicate the resource block position for sending the secondary link data signal, where N indicates that the secondary link is used to send information number of resource blocks (RBs); modulation and coding identification: used to indicate the modulation and coding method for se...

Embodiment 3

[0052] In this embodiment, the information included in the second type of secondary link control signaling is further optimized and given as an example.

[0053] This patent defines the second type of secondary link control signaling, which is used to provide channel quality indication and retransmission request information for the received secondary link data signal channel.

[0054] Preferably, the method for the second terminal to generate the channel quality indicator is to measure a demodulation reference signal to obtain channel state information. It should be pointed out here that the channel state information reflects the impact of the channel on signal degradation, and the channel quality indicator is a graded identifier.

[0055] Preferably, the method for the second terminal to determine whether to retransmit is to calculate the received signal-to-noise ratio by demodulating the reference signal; and determine whether to retransmit according to the signal-to-noise r...

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Abstract

The application discloses a mobile communication system and a terminal direct unicast transmission control method. The method includes the following steps: a first terminal sends a first type of sub-link control signaling, including a first terminal identifier, a second terminal identifier, a resource allocation identifier and a modulation and coding identifier; a second terminal receives a sub-link data signal, and generates a channel quality indicator and re-transmission request information; the second terminal sends a second type of sub-link control signaling to the first terminal, including the second terminal identifier, the first terminal identifier, the channel quality indicator and the re-transmission request information; the first terminal receives the second type of sub-link control signaling, and identifies the second terminal identifier, the first terminal identifier, the channel quality indicator and the re-transmission request information; and the modulation and coding identifier is determined according to the channel quality indicator, and the sub-link data signal is re-transmitted. The mobile communication system includes a base station and at least two terminals. Compared with the prior art, by adopting the scheme of the invention, the transmission reliability can be ensured, the data rate can be increased, and the communication efficiency and security can be improved.

Description

technical field [0001] The present application relates to the field of mobile communication, and in particular to a communication signaling control method and a mobile communication system for realizing unicast directly through a terminal. Background technique [0002] The D2D technology of mobile communication can make full use of the direct communication between terminals in close proximity to replace the communication with the base station and reduce the network burden. It has been widely studied in many standardization organizations, including Bluetooth, IEEE802.11p , LTE D2D, LTE V2X, etc. At present, only the D2D / V2X broadcast and multicast modes are implemented in the 4G communication system. However, for the development of mobile communications in the future 5G stage, the broadcast and multicast modes can no longer meet the needs. For example, applications such as wearable devices and the Internet of Things require direct terminal transmission between specific devi...

Claims

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Application Information

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IPC IPC(8): H04W4/70H04L1/00H04L1/16H04L1/18H04L5/00
CPCH04L1/0009H04L1/1607H04L1/1806H04L5/0057
Inventor 焦慧颖
Owner CHINA ACADEMY OF INFORMATION & COMM
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