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Comprehensive Overview of Coverage Compensation Mechanisms in Cellular Networks

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devlin
13 diapositives · 278 Views · Oct 15, 2014

This document discusses the principles and mechanisms of coverage compensation within cellular networks, addressing specific case scenarios. It details how single and multiple cells can provide coverage compensation, the rules for triggering these modes, and the communication processes involved. The analysis includes instances of both successful and failed coverage compensation and recovery cases. Overall, it emphasizes the importance of leveraging existing messages and defines new messaging standards to facilitate efficient coverage compensation strategies.

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Comprehensive Overview of Coverage Compensation Mechanisms in Cellular Networks
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  1. General consideration for Coverage Compensation Source: ZTE Corporation Yuanfang Yu, Xiaowu Zhao, Ting Lu, Yonggang Fang yu.yuanfang@zte.com.cn Date: June 11, 2012 Recommendation: Discussion for A.S0010-A v1.0

  2. Coverage Compensation case 1 • In case 1, coverage compensation is provided by one cell. • As illustrated, when cell B enters into ES mode, cell A should be notified. In this case, cell A should provide coverage compensation for Cell B. How to provide coverage compensation is TBD (e.g. to adjust its antenna tilt, transmit power, etc). 2

  3. Coverage Compensation case 2 • In case 2, coverage compensation can be provided by multiple cells. • As illustrated, when cell B enters into ES mode, cell A,C should be notified. In this case, cell A,C should provide coverage compensation for cell B. 3

  4. General rules • The triggering of entering ES mode should be in the ES cell. • The compensation cells inform the ES cells of their availability for compensation based on ES cell’s request. • ES cell enters ES mode if all its compensation cells are available for compensation. • The triggering of exiting ES/compensation mode might be in the ES cell or compensation cell. • Compensation cell exits compensation mode if ES cell enters normal mode. 4

  5. Coverage Compensation Successful case 5

  6. Coverage Compensation failure case 6

  7. Coverage Compensation Recovery successful case ---request from Coverage compensation BS 7

  8. Coverage Compensation Recoveryfailure case ---request from Coverage compensation BS 8

  9. Power Recovery successful case---request from Energy saving BS 9

  10. Power Recovery failure case---request from Energy saving BS 10

  11. Summary • General coverage compensation scenarios and call flows are studied here. • It should be considered to use existing messages (A27-ES Response, A27-ES power-on-off request, A27-ES power-on-off response) defined in A.S0010 as much as possible to support coverage compensation cases. Some new fields might be added. • A new message A27-ES Request is defined for the cases that source RAN which wants to power on/off itself requests its neighbor to provide or exit coverage compensation. • A new message A27-Ack is defined to acknowledge the reception of A27 message. 11

  12. For further discussion • Hybrid OAM-based and signaling-based approach can be used for coverage compensation, e.g. compensation related parameters can be pre-configured by OAM, once energy saving with compensation is triggering through signaling among cells, compensation cell can use these pre-configured parameters to adjust its antenna tilt, transmit power and others directly. 12