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Resource distribution method of D2D communication in LTE-A cellular network

A technology of LTE-A and resource allocation, which is applied in wireless communication, network planning, electrical components, etc., and can solve problems such as incapable of large throughput

Inactive Publication Date: 2013-10-16
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In a scenario where D2D users are dense, this resource allocation method limits the number of D2D users who can access the channel, and cannot enable the system to obtain greater throughput.

Method used

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  • Resource distribution method of D2D communication in LTE-A cellular network
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  • Resource distribution method of D2D communication in LTE-A cellular network

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] First of all, it should be explained that the technical concept of the present invention is as follows:

[0041] From the perspective of improving spatial multiplexing, on the premise of ensuring the normal communication of cellular users, multiple D2D communication links are allowed to reuse the RB of a cellular user for communication, and multiplexing of different D2D communication links of the same RB is considered. Mutual interference between cellular users and D2D users. Under the premise of satisfying the QoS of cellular users and all D2D users accessing channels, the number of D2D communication links accessing each RB is maximized.

[0042] refer to figure 1 , the simulation scenario of the present invention includes M cellular users and 2N D2D communication users, these D2D communication users form N D2D communication links, the number o...

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Abstract

Disclosed in the invention is a resource distribution method of device-to-device (D2D) communication in long term evolution-advanced (LTE-A) cellular network. A problem that large number of received D2D links and a high system frequency spectrum utilization rate can not be obtained at a D2D user intensive scene according to the existing resource distribution method can be solved. The method comprise the following steps: step one, calculating a maximum bearing interface of each uplink resource block (RB) at a first uplink time slot of each frame; step two, determining an alternative D2D link set that each uplink RB can receive for each uplink RB and constructing an interference pattern model; step three, executing a resource distribution flow for each uplink RB according to a number sequence of the RBs, solving interference degrees of D2D links in the alternative set, and receiving a D2D link meeting the requirement according to a minimum interference degree priority rule. According to the invention, on the premise that quality of service (QoS) of an existing cellular user of each RB is ensured, a plurality of D2D links are allowed to multiplex the same cellular user, thereby maximizing the number of received D2D links and substantially improving the frequency spectrum utilization rate of the cellular system.

Description

[0001] Technical planning [0002] The invention belongs to the technical field of wireless communication, and in particular relates to a resource allocation method for D2D communication in an LTE-A cellular network. Background technique [0003] D2D (Device to Device, device to device) communication is a kind of communication under the control of the base station. When the mobile terminal with a short distance communicates, it does not need to pass through the relay of the base station, but directly communicates by multiplexing the resources of the cell. It is a new technology, which can not only reduce the business load of the base station, but also allow the mobile terminal to obtain a higher data transmission rate and a lower transmission delay with a smaller transmission power due to its near-field communication characteristics, thereby increasing the mobility The battery standby time of the terminal, on the other hand, greatly increases the spectral efficiency of the cel...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W72/08
Inventor 张琰孙红光盛敏王玺钧刘俊宇李建东史琰李红艳刘伟侯蓉晖杨春刚
Owner XIDIAN UNIV
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