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Broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree

A broadband power line and hybrid service technology, applied in wireless communication, electrical components, multi-frequency code systems, etc., can solve problems such as insufficient attention to fairness, lower overall system performance, increased delay and queue length, etc.

Inactive Publication Date: 2014-03-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

But this scheduling algorithm pays insufficient attention to fairness
Moreover, the delay and queue length of some users will increase rapidly, reducing the overall performance of the system

Method used

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  • Broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree
  • Broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree
  • Broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree

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Embodiment Construction

[0063] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0064] This embodiment is implemented in a typical power line channel environment. The parameters are set as follows: In the power line OFDM system, the number of subcarriers in one OFDM symbol is N=128, the bandwidth range is 0-20MHz, the upper limit of the system power spectrum is -50-0.8f (dBm / Hz), and the maximum The number of assignable bits is 8. Consider the case of 4 users, where user 1 and user 2 are real-time service users, and their bit error rate is set to 10 -4 , while user 3 and user 4 are non-real-time service users, and their bit error rate is set to 10 -6 . And the QoS required rates of the four users are [60, 60, 40, 32] kbps respectively. It should be noted that the above parameters do not affec...

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Abstract

The invention discloses a broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree in the technical field of low-voltage broadband power line communication. The method includes the steps that when emergency degree of a user and a fair effectiveness value of the user are determined under hybrid service; according to the emergency degree of the user under the hybrid service, the dispatching priority of the user is partitioned, and then according to the dispatching priority of the user and the fair effectiveness value of the user, the dispatching sequence of the user is determined; the QoS expected rate of the user is calculated on an MAC layer; according to the total number of groups capable of being borne by subcarrier of a physical layer and the QoS expected rate of the user, the user grouping number sent by the physical layer is determined; resource allocation is performed by the physical layer according to the user grouping number determined by the MAC layer. According to the method, through the inter-layer interaction information, the dispatching priority of the user is judged, the dispatching rate is adjusted, and the fairness performance of the user can be improved under the condition that the throughput performance of the system is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of low-voltage broadband power line communication, and in particular relates to a method for allocating cross-layer resources of broadband power line communication with mixed business urgency priority. Background technique [0002] Broadband Power Line Communication (BPLC) technology is a high-speed data communication technology using power lines as the medium, and has become one of the main technologies for solving user access networks. However, the unique environment of the power line channel brings new technical difficulties to high-speed and reliable data transmission. Orthogonal Frequency Division Multiplexing (OFDM) modulation technology has many advantages, and its basic unit is an OFDM symbol (frame), which can realize effective broadband communication by constructing a BPLC-OFDM system. [0003] BPLC resource allocation is a process of continuously allocating resources in one or several OFDM symbol...

Claims

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Application Information

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IPC IPC(8): H04W72/10H04L27/26
Inventor 陆俊龚钢军孙毅祁兵徐志强段瑞超陈红
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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