Journal on Communications ›› 2019, Vol. 40 ›› Issue (5): 117-124.doi: 10.11959/j.issn.1000-436x.2019102

• Papers • Previous Articles     Next Articles

Optimal resource allocation for two-stage connectionless access with collision detection

Xin JIAN,Fang WANG,Jian SONG,Shu FU,Xiaoheng TAN,Xiaoping ZENG   

  1. College of Microelectronics and Communication Engineering,Chongqing University,Chongqing 400044,China
  • Revised:2019-03-25 Online:2019-05-25 Published:2019-05-30
  • Supported by:
    The National Natural Science Foundation of China(61501065);The National Natural Science Foundation of China(61571069);The National Natural Science Foundation of China(61601067);The National Natural Science Foundation of China(61701054);Chongqing Research Program of Basic Research and Frontier Technology(cstc2016jcyjA0021);The Central University Basic Business Expenses Special Funding for Scientific Research Project(106112017CDJQJ168817);The Central University Basic Business Expenses Special Funding for Scientific Research Project(2018CDXYTX0009);The Central University Basic Business Expenses Special Funding for Scientific Research Project(2018CDYJSY0055);The Central University Basic Business Expenses Special Funding for Scientific Research Project(2019CDXYTX0023)

Abstract:

Connectionless access allows massive machine type communication (mMTC) devices to transmit small packets without establishment of radio bearers,significantly reducing device power consumption and control signaling overhead.Two-stage connectionless access (TSCLA) improves throughput and resource efficiency by optimally allocating resources between scheduling request (SR) phase and data transmission phase,which can be used for bigger packets and high traffic load.Based on this,a comprehensive theoretical analysis of one kind of TSCLA with collision detection was conducted to investigate its performance limit and devise its optimal resource allocation scheme.In addition,to avoid the complexity of user number estimation,a dynamic resource allocation algorithm with feedback control was proposed.Numerical results are provided to validate the effectiveness of aforementioned theoretical results and show that comparing with the genie aided algorithm known exactly the number of users,the performance loss of the proposed algorithm is within 4%.These works together provide good references for appropriate resource dimensioning for mMTC related protocols.

Key words: massive machine type communication, connectionless access, performance limit, optimal resource allocation

CLC Number: 

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