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User collaboration method with joint network coding and channel coding

A technology of channel coding and joint network, which is applied in the field of user cooperation of joint network coding and channel coding, which can solve the problems of reducing efficiency and achieve the effect of reducing end-to-end delay and improving transmission efficiency

Inactive Publication Date: 2009-06-03
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] From the description of the above two schemes, it can be seen that the existing schemes require an additional time slot as a coordination stage, which leads to additional delay overhead and reduces efficiency.

Method used

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  • User collaboration method with joint network coding and channel coding
  • User collaboration method with joint network coding and channel coding
  • User collaboration method with joint network coding and channel coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The present invention discloses a user cooperation method combining network coding and channel coding. The user has at least one partner user; each user concatenates its own information and the information of each partner user together to form a longer information sequence ; Perform channel coding on the sequence and broadcast the coded data, thereby realizing network coding; the base station obtains user information through joint iterative decoding according to the original data broadcast by the user and the data after joint network-channel coding.

[0053] The data of the user and its partner users are divided into several data blocks. The number of the cooperating users may be one or more, and this embodiment uses one as an example for introduction.

[0054] see Figure 4 to Figure 6 , users UE1 and UE2 are partner users, and the specific steps of the present invention are as follows:

[0055] 1. In the initial stage, UE1 performs channel coding on its own informat...

Embodiment 2

[0062]In this embodiment, the method for obtaining a data block among the user and each partner user includes the following steps:

[0063] Step A. In the first stage, each user broadcasts its own data, the base station receives the data of each user, and the partner users respectively receive the data transmitted by the user.

[0064] Step B, the user UE(i) has n partner users; the user UE(i) decodes and decodes the information sequence of each partner user, and UE(i) concatenates the information bits of each partner user with its own information bits Obtain an information sequence of n+1 times the length; the concatenated information sequence is sent to the channel encoder, and the check bits obtained after encoding will be punctured according to the length that the resource block can accommodate, and the punctured check bits Denote it as P.

[0065] Step C. In the second stage, the user parity bits P are forwarded simultaneously by means of space-time coding for reception ...

Embodiment 3

[0074] Embodiment three - two embodiment comparisons

[0075] The parameters of the link simulation performed according to the above two embodiments are shown in Table 1.

[0076]

[0077]

[0078] Table 1. Simulation parameters1

[0079] For simulation results see Figure 9 ,Depend on Figure 9 It can be seen that the scheme proposed by the present invention has higher spectral efficiency than the traditional scheme in the area of ​​high signal-to-noise ratio. The delay comparison of the above schemes is shown in Table 2 (the delay of hybrid automatic repeat request (HARQ) is not considered):

[0080]

Traditional Coding Collaboration traditional space-time coding

cooperation Joint Network-Channel Coding

Collaboration (Option 1) Joint Network-Channel Coding

Space-time cooperation (Option 2) Each packet transmits

number of time slots required 1.5 1.5 1 1.25

[0081] Table 2. Latency comparison of various schemes

[0082] I...

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Abstract

The invention discloses a user collaboration method of joint network coding and channel coding. Each user owns at least one partner user; each user connects the self-information with the information of each partner users in series for forming a longer information sequence; the channel coding is carried out on the sequence, and the coded data is broadcasted, and the network coding is realized; a base station obtains the information of the users by joint iterative decoding according to the original data broadcasted by the users and the data after the joint network coding and channel coding. As the network coding joints information bits of a plurality of partner users together, the collaboration stage of the user collaboration method with joint network coding and channel coding only occupies one half of timeslot of the traditional space-time coding collaboration proposal, thereby reducing the end-to-end time delay and improving the transmission efficiency.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a user cooperation method, in particular to a user cooperation method combining network coding and channel coding. Background technique [0002] User cooperative relay and network coding are relatively popular research fields in future mobile communication technology. How to apply network coding to user collaboration scenarios to obtain a feasible solution and further exploit the space diversity gain is still an unsolved problem. [0003] Diversity technology can improve the effective signal-to-noise ratio (SNR) of a wireless fading channel [see document 1 "Microwave Mobile Communications, W.C. Jakes, Ed., Wiley, New York, 1974."]. The concept of "user cooperation" has long been proposed. It obtains uplink transmission diversity by using mobile users as relays for each other and forwarding each other's information [please refer to literature 2 "A.Sendonaris, E.Erkip, and B.A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W84/18H04B7/02H04W88/04
Inventor 周婷徐景王芳王海峰
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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