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Method and apparatus for power saving operations in wireless network elements

  • US 9,693,299 B2
  • Filed: 11/30/2009
  • Issued: 06/27/2017
  • Est. Priority Date: 11/30/2009
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • determining at a base station an activity level in a current radio frame;

    selecting, by the base station, an availability mode for the base station based at least in part on the activity level, wherein the availability mode is one of a full-availability mode, a semi-availability mode and a minimum-availability mode, wherein each of the full-availability mode, semi-availability mode and minimum-availability mode is defined by different numbers of receiving-on periods, within a beacon interval, of the base station;

    configuring radio resources for and the selected availability mode;

    scheduling discontinuous reception (DRx) cycles for the selected availability mode;

    switching to the selected availability mode and indicating the selected availability mode to a plurality of active user equipments (UEs); and

    transmitting and receiving data in the selected availability mode,wherein the full-availability mode has a higher number of receive-on periods than the semi-availability mode, and is selected when at least the activity level is higher than a maximum activity level defined to be supported by the semi-availability mode, wherein the minimum-availability mode has a lower number of receive-on periods than the semi-availability mode, and is selected when at least the activity level is lower than a minimum activity level defined to be supported by the semi-availability mode,wherein the configuring radio resources comprises allocating primary broadcast channels (PBCHs) for the selected availability mode by consolidating the PBCHs over multiple radio frames into a single radio frame, increasing power of synchronization channel in the single radio frame, and selecting maximum available number of random access channel (RACH) locations,wherein the scheduling DRx cycles for the selected availability mode comprises synchronizing receive-on periods of the DRx cycles of the base station in the current radio frame with the receive-on period of a radio frame next in time to the current radio frame by signaling offsets to active UEs associated with the base station, andwherein the selection of the availability mode is further based on an amount of receiving resources needed.

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