Sleep-mode statistics apparatus, systems, and methods

• US 7,751,858 B2
• Filed: 05/05/2006
• Issued: 07/06/2010
• Est. Priority Date: 05/05/2006
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Chou, Joey
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US11/381,898
• Publication Number:
  US 20070274247A1
• Time in Patent Office: 1,523 Days
• Field of Search: 455/574, 455/343.1, 455/343.2, 455/343.5, 455/517, 455/423, 370/311, 370/310
• US Class Current: 455/574
• CPC Class Codes: H04M 1/72457 according to geographic location
• CPC Class Codes: H04W 52/0258 controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of sleep-mode statistics apparatus, systems, and methods are described generally herein. Other embodiments may be described and claimed.

Claims

1. An apparatus, including:

a sleep-mode (SM) statistics module at a wireless base station (BS), the SM statistics module to capture and store a plurality of SM statistics associated with a mobile station (MS) in communication with the BS; and

a memory to contain a data structure associated with the SM statistics module, wherein the data structure is segmented according to a plurality of geographical sectors served by the BS and wherein the data structure is further segmented to store a plurality of records associated with the MS as the MS roams in a geographical sector of the plurality of geographical sectors.

2. The apparatus of claim 1, wherein the data structure comprises at least one of a table, an array, or a list.

3. The apparatus of claim 1, wherein a record associated with the plurality of records comprises a connection identification number (CID) associated with the MS and at least one of an indicator of a start time of a sleep window associated with the CID, an indicator of a start time of a listening window associated with the CID, a number of pending wireless media access control (MAC) service data units (SDUs) associated with the CID, or a time stamp.

4. The apparatus of claim 3, wherein the time stamp comprises at least one of a time of writing the record, the start time of the sleep window, or a time of a transmission of a sleep response message from the BS to the MS.

5. The apparatus of claim 3, further including:

an SM control module operatively coupled to the SM statistics module to establish the start time of the sleep window and the start time of the listening window and to provide at least one of the CID, the indicator of the start time of the sleep window, the indicator of the start time of the listening window, or the number of pending wireless MAC SDUs to the SM statistics module.

6. The apparatus of claim 1, further including:

a management information base (MIB) agent associated with the SM statistics module, wherein the MIB agent is capable of responding to a query for the plurality of SM statistics.

7. A method, including:

at a wireless base station (BS), capturing and storing a plurality of sleep-mode (SM) statistics related to a plurality of mobile stations (MSs) associated to the BS;

at the BS, receiving a sleep request message from a mobile station (MS), the MS being one of the plurality of MSs; and

sending a sleep response message from the BS to the MS, wherein the sleep response message indicates at least one of a power-saving class, a sleep start time, a sleep period, a listening start time, or a listening period.

8. The method of claim 7, wherein the plurality of SM statistics comprises a

sector subset of SM statistics, the sector subset associated with a geographical sector served by the BS.

9. The method of claim 8, wherein the sector subset of SM statistics comprises an MS subset of SM statistics, the MS subset associated with a particular MS served by the BS.

10. A method, including:

at a wireless base station (BS), capturing and storing a plurality of sleep-mode (SM) statistics related to a plurality of mobile stations (MSs) associated to the BS, wherein the plurality of SM statistics comprises a sector subset of SM statistics, the sector subset associated with a geographical sector served by the BS and wherein the sector subset of SM statistics comprises an MS subset of SM statistics, the MS subset associated with a particular MS served by the BS;

at an MS subset of a table associated with the plurality of SM statistics, writing a record comprising a connection identification (CID) number associated with the particular MS and at least one of an indicator of a start time of a sleep window associated with the CID, an indicator of a start time of a listening window associated with the CID, a number of pending wireless media access control (MAC) service data units (SDUs) associated with the CID, or a time stamp; and

moving a write index pointer to a next record location in the MS subset of the table to prepare to write the next record, wherein the next record location comprises a first record location if the MS subset of the table comprises a wrap-around structure.

11. The method of claim 10, wherein the time stamp comprises at least one of a time of writing the record, a time of the start of the sleep window, or a time of a transmission of a sleep response message from the BS to the MS.

12. The method of claim 10, wherein for any record in the table, at least one of the indicator of the start time of the sleep window and the indicator of the start time of the listening window comprises at least one of a frame count or a time stamp.

13. The method of claim 10, wherein for any record, an end time of the sleep window is substantially coincident with a start time of a next listening window.

14. The method of claim 10, wherein for a particular CID, an end time of the listening window is substantially coincident with a start time of a next sleep window associated with the particular CID.

15. The method of claim 10, further including:

calculating an accumulated sleep time associated with the MS over a sleep measurement period by;

selecting a plurality of records from the MS subset of the table, each record of the plurality of records having a time stamp indicating a record-creation time falling within the sleep measurement period; and

summing intervals within the sleep measurement period wherein sleep windows associated with all CIDs recorded during the sleep measurement period overlap in time.

16. The method of claim 15, further including:

calculating a second-order SM statistic including at least one of an average percentage of actual sleep time, an average number of connections per time, or an average number of pending MAC SDUs per time.

17. The method of claim 16, further including:

responding to a query by a network management system (NMS) with at least one of selected ones of the plurality of SM statistics or the second-order SM statistic.

18. The method of claim 17, further including:

sending at least one of selected ones of the plurality of SM statistics or the second-order SM statistic to an SM control module to adjust SM timing as determined by the SM control module.

19. The method of claim 18, further including:

at least one of the SM control module or the NMS, debugging the SM timing using the at least one of selected ones of the plurality of SM statistics or the second-order SM statistic.

20. The method of claim 18, further including:

at least one of the SM control module or the NMS, monitoring a performance parameter associated with the SM timing using at least one of selected ones of the plurality of SM statistics or the second-order SM statistic.

21. An article including a machine-accessible medium having

associated information, wherein the information, when accessed, results in a machine performing:

at a wireless base station (BS), capturing and recording a plurality of sleep-mode (SM) statistics associated with a plurality of mobile stations (MSs);

at an MS subset of a table associated with the plurality of SM statistics, writing a connection identification (CID) number associated with the particular MS and at least one of an indicator of a start time of a sleep window associated with the CID, an indicator of a start time of a listening window associated with the CID, a number of pending wireless media access control (MAC) service data units (SDUs) associated with the CID, or the time stamp of the time of writing the record; and

moving a write index pointer to a next record location in the MS subset of the table to prepare to write the next record, wherein the next record location comprises the first record location if the MS subset of the table comprises a wrap-around structure.

22. The article of claim 21, wherein the wireless base station comprises a component of a wireless system conforming to at least one of an Institute of Electrical and Electronic Engineers (IEEE) 802.16e™

standard, a 3^rd Generation Partnership Project (3GPP) standard, or an International Mobile Telecommunications-2000 (IMT-2000) standard.