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Cross-layer optimization design method in single-source and single-terminal straight-through relay communication system

A direct relay and cross-layer optimization technology, applied in the field of computer communication, can solve the problems of D2D communication power and distance limitation, mutual interference, etc.

Active Publication Date: 2014-05-14
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] However, the proposal of D2D technology brings new problems: the base station is required to assist in proper resource allocation; when the base station allocates the same resources for D2D and cells, the multiplexed cellular users occupy the same resources as D2D communication (time or Frequency), so that there is mutual interference between the two communications; the volume power consumption limitation of the user equipment limits the power and distance of D2D communication

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  • Cross-layer optimization design method in single-source and single-terminal straight-through relay communication system
  • Cross-layer optimization design method in single-source and single-terminal straight-through relay communication system

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Embodiment Construction

[0054] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0055] (1) The resource allocation process of the base station to the direct user is as follows (such as figure 2 shown):

[0056] Step 1: The D2D sender first broadcasts the session request on the CCCH;

[0057] Step 2: If there is a cellular user willing to help the D2D user forward the signal within its effective communication range, then the cellular user will reply a confirmation signal to the D2D sending end, and at the same time send the D2D request to the base station

[0058] Step 3: The base station monitors the information on the CCCH of the users nearby the direct-to user, and measures the interference status existing nearby according to the information;

[0059] Step 4: After receiving the request, the base station allocates resources such as available frequency for the D2D user according to the cross-layer optimization criterion, and notifies the D2D...

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Abstract

The invention discloses a cross-layer optimization design method in a single-source and single-terminal straight-through relay communication system. The method comprises the two steps of resource distribution and data transmission; the single-source and single-terminal mode means that data are transmitted from one sending source straight-through user to one receiving terminal user. The resource distribution process is the process of applying frequency resources for a base station before the straight-through user builds a communication link; the base station needs to judge how to distribute ideal frequency resources to the straight-through user according to the geographic positions of the applicant, the transmission environment, data types of services and the like; the normal operation of a cellular system is not affected while the effectiveness and reliability of the communication of the straight-through link are ensured. The data transmission process is the process that how to use the resources to achieve efficient communication after the straight-through user obtains the frequency resources. According to the method, link communication is carried out in the mode of combination of adaptive coding modulation and automatic hybrid retransmission.

Description

technical field [0001] The invention relates to the technical field of computer communication, in particular to a cross-layer optimization design method in a single-source single-sink direct relay communication system. Background technique [0002] The introduction of direct-to-connection technology (D2D) in traditional cellular systems can overcome the limitations of the base station-centered cell service provision mode brought about by the development of wireless multimedia services in the IMT-Advanced system in adapting to local service development. D2D technology can improve network structure, enhanced coverage, and increased system capacity. [0003] However, the proposal of D2D technology brings new problems: the base station is required to assist in proper resource allocation; when the base station allocates the same resources for D2D and cells, the multiplexed cellular users occupy the same resources as D2D communication (time or Frequency), so that there is mutual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/14H04W72/04H04B7/26
Inventor 孙君朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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