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Mixed service resource distributing method for OFDM system

A technology of resource allocation and joint allocation, which is applied in the direction of communication, signal channel, radio/induction link selection and arrangement between multiple stations, and can solve problems such as unreasonable and no scheduling algorithm.

Inactive Publication Date: 2006-12-27
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] The method of hybrid resource allocation mentioned in "International Conference Organized by IEEE Communications SocietyIEEE International Conference, Volume 1, 2004, pp58-62", due to the use of exponential scheduling criteria and proportional fairness criteria, respectively Calculate the utility function of real-time business and non-real-time business, so it does not give a scheduling algorithm suitable for both real-time business and non-real-time business; in addition, this method assumes that data business packets will not be discarded due to delay. unreasonable

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  • Mixed service resource distributing method for OFDM system
  • Mixed service resource distributing method for OFDM system
  • Mixed service resource distributing method for OFDM system

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Embodiment 1

[0050] This embodiment uses an OFDM transmission system with a bandwidth of 2.048 MHz and a number of data subcarriers of 64. The channel adopts the COST207 six-path model, the maximum multipath delay is 10us, the six paths are distributed at equal intervals within 0-10us, and the power spectral density of each path meets the usual Jake model. The maximum Doppler frequency deviation is 300Hz. The slot length is 1ms, the packet size is fixed at 1280bits, and the sliding window length is t c The value of is 1000 time slots. MQAM adaptive modulation mode is adopted, M={0, 2, 4, 8, 16, 32}. The number of voice users and data users in the fixed system are 5 and 3 respectively.

[0051] The business source model adopts ON-OFF two-state Markov process. The active period and the silent period are independent of each other and obey the exponential distribution. The transition probability from the active period to the silent period is γ=1-exp(-T slot / t 1 ), the transition probab...

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Abstract

The hybrid business resource allocation method in FDM system comprises: presenting a service quality satisfaction level criterion based on optimal physical and data linkage layers; with this criterion, according to active user number, server quality request and received service utility function value in every time slot, deciding user PRI, and allocating adaptively sub-carrier to user with high PRI. This invention can meet user service request and ensures fairness.

Description

Technical field: [0001] The invention belongs to the technical field of Orthogonal Frequency Division Multiplexing (OFDM) mobile communication, and particularly relates to a mixed service resource allocation method in the OFDM communication system. Background technique: [0002] Traditional OFDM resource allocation research focuses on two aspects of bit allocation and power allocation, such as "International Institute of Electronics and Electrical Engineers Communication Topics Journal" (IEEE J. -1758) mentioned multi-user adaptive subcarrier, bit and power allocation algorithm. Because these algorithms do not take into account the random characteristics of service arrival, user queue status, user requirements for Quality of Service (QoS), etc. during the allocation process, it is difficult to provide users with satisfactory services. [0003] The method of hybrid resource allocation mentioned in "International Conference Organized by IEEE Communications SocietyIEEE Interna...

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Application Information

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IPC IPC(8): H04B7/26H04L5/02H04Q7/36
Inventor 侯华周武旸朱近康
Owner UNIV OF SCI & TECH OF CHINA
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