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Data transmission scheduling and data transmission method and equipment

A scheduling method and data transmission technology, applied in electrical components, wireless communication, etc., can solve problems such as large signaling overhead

Active Publication Date: 2014-09-24
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] To sum up, in D2D group communication, if each user independently schedules data transmission / reception, it will lead to relatively large signaling overhead

Method used

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  • Data transmission scheduling and data transmission method and equipment
  • Data transmission scheduling and data transmission method and equipment
  • Data transmission scheduling and data transmission method and equipment

Examples

Experimental program
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Effect test

Embodiment approach

[0074] For the definition of the common search space, see the part of the background technology description. For the analysis of the meaning of the information contained in the DCI, if the DCI of the sending terminal is scrambled with D2D-GROUP-RNTI, then the DCI contains the indication information field in the present invention. If the scrambled RNTI of the received DCI is D2D-GROUP-RNTI, the receiving terminal will analyze it according to the method of including the indication information field in the present invention, so as to decide whether to receive data or send data on the D2D link. Since different RNTIs can already distinguish different DCIs, some information bits in the existing DCI format are compressed or their meanings are redefined, so that the length of the new DCI may not be changed.

[0075] Second, the network side sends DCI in the pre-defined E-PDCCH common search space for D2D communication;

[0076] Implementation of the method:

[0077]Configure a common...

Embodiment 1

[0097] In D2D group communication, the interaction method between the network side and the terminal side is as follows:

[0098] Step 1: The base station generates a DCI containing an indication information field, the indication information field carries the sending terminal in the D2D group to send data on the specified resource of the D2D link, and the receiving terminal in the D2D group to send data on the specified resource of the D2D link Instructions for receiving data on the Internet;

[0099] Step 2: the base station scrambles the generated DCI by using the RNTI for scheduling group communication;

[0100] Step 3: The base station sends the DCI scrambled by the RNTI through the N2D link;

[0101] Step 4: The terminal in the D2D group detects the DCI scrambled by the RNTI for scheduling group communication;

[0102] Step 5: After the terminal in the D2D group detects the DCI scrambled by the RNTI used to schedule group communication, it determines whether it is a send...

Embodiment 2

[0104] In D2D broadcast communication, the interaction method between the network side and the terminal side is as follows:

[0105] Step 1: The base station generates a DCI containing an indication information field, the indication information field carries the sending terminal in the D2D broadcast communication to send data on the designated resource of the D2D link, and the receiving terminal in the D2D broadcast communication to send data on the designated resource of the D2D link Instructions for receiving data on the Internet;

[0106] Step 2: the base station scrambles the generated DCI by using the RNTI for scheduling broadcast communication;

[0107] Step 3: The base station sends the DCI scrambled by the RNTI through the N2D link;

[0108] Step 4: Each authorized terminal detects the DCI scrambled by the RNTI used for scheduling broadcast communication;

[0109] Step 5: After detecting the DCI scrambled by the RNTI used for scheduling broadcast communication, the t...

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Abstract

The embodiment of the invention discloses a data transmission scheduling and data transmission method and equipment, relates to the field of wireless communication and is used for reducing system signaling overhead. In the invention, a network side generates a DCI comprising an indication information domain. The indication information domain carries indication information for sending data on the designated resource of a D2D link by a sending terminal and indication formation for receiving the data on the designated resource of the D2D link by a receiving terminal. An RNTI used for scheduling group communication or broadcast communication is utilized to scramble the generated DCI, and the DCI scrambled by the RNTI is sent. After the terminal detects the DCI, confirmation of the sending terminal or the receiving terminal is performed according to the indication information in the DCI. If the terminal is the sending terminal, the data are sent to the receiving terminal on the designated resource of the D2D link. If the terminal is the receiving terminal, the data are received on the designated resource of the D2D link. The system signaling overhead is effectively reduced by the scheme.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a data transmission scheduling and data transmission method and device. Background technique [0002] In traditional cellular communication technology, the data communication process between two terminals (User Equipment, UE) is as follows: figure 1 shown. The voice and data services of the two terminals interact through the base station (eNB) where they reside and the core network. [0003] Device-to-Device (D2D) technology refers to the way that adjacent terminals can transmit data through direct links within a short distance without forwarding through central nodes (ie, base stations), such as figure 2 shown. The short-distance communication characteristics and direct communication mode of D2D technology make it have the following advantages: [0004] First, the terminal short-distance direct communication method can achieve higher data rate, lower delay and ...

Claims

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Application Information

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IPC IPC(8): H04W72/12
Inventor 赵锐高秋彬陈文洪彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD
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