Methods and apparatus for power management in a wireless communication system

• US 9,451,480 B2
• Filed: 07/28/2014
• Issued: 09/20/2016
• Est. Priority Date: 09/28/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Lili, Khaitan, Varun, Huang, Yichao, Patel, Chirag Sureshbhai, Kadous, Tamer Adel, Yavuz, Mehmet, Prakash, Rajat, Chande, Vinay, Chevallier, Christophe, Nagaraja, Sumeeth, Meshkati, Farhad, Mitra, Suhas, Makh, Vansh Pal Singh, Tokgoz, Yeliz, Shen, Cong
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): SONG, REBECCA E
• Application Number:
  US14/444,582
• Publication Number:
  US 20140334424A1
• Time in Patent Office: 785 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/391 Modelling the propagation channel
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/226 using past references to control power, e.g. look-up-table
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Methods and apparatus for communication comprise aspects that include performing a power management procedure for configuring a subset of network entities to receive one or more of downlink signal measurements and/or one or more uplink signal measurements. The methods and apparatus further comprise aspects that include storing the one or more one or more of downlink signal measurements and/or one or more uplink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities. Moreover, the methods and apparatus comprise aspects that include adjusting a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more of downlink signal measurements and/or one or more uplink signal measurements.

Claims

1. A method of communication, comprising:

performing at least one power management procedure for configuring at least one of a subset of network entities to receive one or more downlink signal measurements of the subset of network entities, wherein performing the at least one power management procedure includes;

determining the subset of network entities from a set of network entities based on a power value of a reference signal transmitted by the subset of network entities during an inactive session;

scheduling transmission of at least one reference signal for each respective network entity of the subset of network entities during an active session on a downlink communication channel to avoid interference with neighboring network entities; and

receiving the one or more downlink signal measurements of the at least one reference signal transmitted by each respective network entity of the subset of network entities;

storing the one or more downlink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities; and

adjusting a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more downlink signal measurements.

2. The method of claim 1, further comprising determining a technician route based at least in part on determining the subset of network entities, wherein receiving the one or more downlink signal measurements comprises receiving, from one or more measurement devices associated with the technician route, the one or more downlink signal measurements of the subset of network entities.

3. The method of claim 2, wherein receiving the one or more downlink signal measurements comprises receiving, from the one or more measurement devices associated with the technician route, a measurement value from at least a portion of the subset of network entities experiencing higher traffic than at least another portion of the subset of network entities.

4. The method of claim 1, wherein the transmission of the at least one reference signal by each of the subset of network entities during the active session occurs at a first reference signal transmit power value, which is higher than a second reference signal transmit power value during the inactive session.

5. The method of claim 1, wherein scheduling the transmission of the at least one reference signal for each respective network entity of the subset of network entities during the active session is based on one or both of a random assignment procedure and a self-organizing procedure.

6. The method of claim 5, wherein determining the subset of network entities from the set of network entities comprises determining a first network entity from the set of network entities for transmission of the at least one reference signal at a first time slot and a second network entity from the set of network entities for transmission of the at least one reference signal at a second time slot, wherein determining of the first network entity and the second network entity is based at least in part on one or both of the random assignment procedure and the self-organizing procedure.

7. The method of claim 5, wherein determining the subset of network entities from the set of network entities comprises determining a first network entity from the set of network entities for transmission of the at least one reference signal at a first frequency value and a second network entity from the set of network entities for transmission of the at least one reference signal at a second frequency value, wherein determining of the first network entity and the second network entity is based at least in part on one or both of the random assignment procedure and the self-organizing procedure.

8. The method of claim 1, wherein the one or more downlink signal measurements comprise one or more signal-to-interference-plus-noise-ratio (SINR) values, one or more of reference signal received quality (RSRQ) values and one or more indications related to SINR or RSRQ.

9. The method of claim 1, wherein performing the power management procedure comprises:

receiving the one or more downlink signal measurements of the subset of network entities during an active duration, wherein the subset of network entities comprise one or more network entities detected by one or more UEs forming one or both a technician route and a user route; and

determining network entity association information based on the one or more downlink signal measurements, wherein the network entity association information comprises statistical information relating to the one or more downlink signal measurements.

10. The method of claim 9, wherein the one or more downlink signal measurements are received from the one or more UEs forming the technician route during a first measurement time duration or the one or more UEs forming the user route during a second measurement time duration, wherein the second measurement time duration is longer in duration than the first measurement time duration.

11. The method of claim 9, wherein the network entity association information comprises one or both of statistical information detected in a time domain for the subset of network entities and statistical information detected in a spatial domain for the subset of the network entities.

12. The method of claim 9, wherein the one or more downlink signal measurements comprise one or more reference signal receive power (RSRP) values.

13. A method of communication, comprising:

performing a power management procedure for configuring at least one network entity of a subset of network entities to receive one or more uplink signal measurements associated with the subset of network entities, wherein performing the power management procedure includes;

receiving, by the at least one network entity from the subset of network entities, a UE indication, wherein the UE indication is received by the subset of network entities from one or more UEs and is associated with the one or more UEs on an uplink communication channel; and

determining the one or more uplink signal measurements based at least in part on correlating the UE indication with a received signal strength indicator (RSSI) value;

storing the one or more uplink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities; and

adjusting a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more uplink signal measurements.

14. The method of claim 13, wherein the UE indication comprises a sounding reference signal (SRS) and a demodulation reference signal (DM-RS).

15. An apparatus for communication, comprising:

a memory storing executable instructions; and

a processor in communication with the memory, wherein the processor is configured to execute the instructions to;

perform at least one power management procedure for configuring at least one of a subset of network entities to receive one or more downlink signal measurements of the subset of network entities, wherein the instructions to perform the at least one power management procedure include instructions to;

determine the subset of network entities from a set of network entities based on a power value of a reference signal transmitted by the subset of network entities during an inactive session;

schedule transmission of the at least one reference signal for each respective network entity of the subset of network entities during an active session on a downlink communication channel to avoid interference with neighboring network entities; and

receive the one or more downlink signal measurements of the at least one reference signal transmitted by each respective network entity of the subset of network entities;

store the one or more downlink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities; and

adjust a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more downlink signal measurements.

16. The apparatus of claim 15, wherein the processor is further configured to execute the instructions to determine a technician route based at least in part on determining the subset of network entities, wherein to receive the one or more downlink signal measurements, the processor is further configured to execute the instructions to receive, from one or more measurement devices associated with the technician route, the one or more downlink signal measurements of the subset of network entities.

17. The apparatus of claim 16, wherein to receive the one or more downlink signal measurements, the processor is further configured to execute the instructions to receive, from the one or more measurement devices associated with the technician route, a measurement value from at least a portion of the subset of network entities experiencing higher traffic than at least another portion of the subset of network entities.

18. The apparatus of claim 15, wherein the transmission of the at least one reference signal by each of the subset of network entities during the active session occurs at a first reference signal transmit power value, which is higher than a second reference signal power value during the inactive session.

19. The apparatus of claim 15, wherein the processor is further configured to execute the instructions to schedule the transmission of the at least one reference signal for each respective network entity of the subset of network entities during the active session based on one or both of a random assignment procedure and a self-organizing procedure.

20. The apparatus of claim 19, wherein to determine the subset of network entities from the set of network entities, the processor is further configured to execute the instructions to determine a first network entity from the set of network entities for transmission of the at least one reference signal at a first time slot and a second network entity from the set of network entities for transmission of the at least one reference signal at a second time slot, wherein determining of the first network entity and the second network entity is based at least in part on one or both of the random assignment procedure and the self-organizing procedure.

21. The apparatus of claim 19, wherein to determine the subset of network entities from the set of network entities, the processor is further configured to execute the instructions to determine a first network entity from the set of network entities for transmission of the at least one reference signal at a first frequency value and a second network entity from the set of network entities for transmission of the at least one reference signal at a second frequency value, wherein determining of the first network entity and the second network entity is based at least in part on one or both of the random assignment procedure and the self-organizing procedure.

22. The apparatus of claim 15, wherein the one or more downlink signal measurements comprise one or more signal-to-interference-plus-noise-ratio (SINR) values, one or more of reference signal received quality (RSRQ) values and one or more indications related to SINR or RSRQ.

23. The apparatus of claim 15, wherein to perform the power management procedure, the processor is further configured to execute the instructions to:

receive the one or more downlink signal measurements of the subset of network entities during an active duration, wherein the subset of network entities comprise one or more network entities detected by one or more UEs forming one or both a technician route and a user route; and

determine network entity association information based on the one or more downlink signal measurements, wherein the network entity association information comprises statistical information relating to the one or more downlink signal measurements.

24. The apparatus of claim 23, wherein the one or more downlink signal measurements are received from the one or more UEs forming the technician route during a first measurement time duration or the one or more UEs forming the user route during a second measurement time duration, wherein the second measurement time duration is longer in duration than the first measurement time duration.

25. The apparatus of claim 23, wherein the network entity association information comprises one or both of statistical information detected in a time domain for the subset of network entities and statistical information detected in a spatial domain for the subset of the network entities.

26. The apparatus of claim 23, wherein the one or more downlink signal measurements comprise one or more reference signal receive power (RSRP) values.

27. An apparatus for communication, comprising:

a memory storing executable instructions; and

a processor in communication with the memory, wherein the processor is configured to execute the instructions to;

perform a power management procedure for configuring at least one network entity of a subset of network entities to receive one or more uplink signal measurements associated with the subset of network entities, wherein the instructions to perform the power management procedure include instructions to;

receive, by the at least one network entity from the subset of network entities, a UE indication, wherein the UE indication is received by the subset of network entities from one or more UEs and is associated with the one or more UEs on an uplink communication channel; and

determine the one or more uplink signal measurements based at least in part on correlating the UE indication with a received signal strength indicator (RSSI) value;

store the one or more uplink signal measurements associated with the subset of network entities at a database for managing transmit power at the subset of network entities; and

adjust a transmit power value of at least one of the subset of network entities from a first transmit power value to a second transmit power value based at least in part on the one or more uplink signal measurements.

28. The apparatus of claim 27, wherein the UE indication comprises a sounding reference signal (SRS) and a demodulation reference signal (DM-RS).