Location determination in wireless communication systems

A method, comprising:

• receiving a location beacon transmitted from multiple base stations based at least in part on a transmission plan for a downlink location based services zone (D-LBS) in a signal subframe, frame or superframe structure, or combinations thereof, wherein the transmission plan comprises a pseudorandom transmission plan that includes spreading transmissions of the location beacon that are unique to respective base stations;
• partitioning a set of location beacons into a number of groups based at least in part on a number of resources available in the downlink location based services zone (D-LBS);
• reproducing the transmission plan at a receiver side to identify on which resources candidate base stations of the D-LBS zone transmit location beacons and to perform measurement of signal location parameters for a set of neighboring base station;
• identifying the base stations based at least in part on the respective location beacons and the transmission plan and based at least in art on matching a cell identification of a base station of a corresponding D-LBS zone resource on which a location beacon was received;
• measuring signal location parameters of the identified base stations;
• and
• identifying a present location based at least in part on the location beacons and the identities of the base stations from which the location beacons were received.

An article of manufacture comprising a non-transitory storage medium having instructions stored thereon that, if executed, result in:

• configuring a transmission plan for a downlink location based services (D-LBS) zone based at least in part on resources available for transmission of location beacons, wherein the transmission plan comprises a pseudorandom transmission plan that assigns different base stations for transmission on different resources of the D-LBS zone to perform measurements of signal location parameters from multiple base stations or relay stations, or combinations thereof, of a network;
• setting a pseudorandom number generator to an initial value that depends on a cell identification if a superframe or a frame count is zeroed;
• for subsequently allocated D-LBS zones, calculating a recursion using the pseudorandom number generator and an initial cell identification value of the station;
• transmitting configuration parameters for the D-LBS zone from said configuring;
• and
• transmitting one or more location beacon signals on an assigned resource of the D-LBS zone based at least in part on the calculated recursion value.

An information-handling system, comprising:

• a processor and a memory coupled to the processor, wherein instructions in the memory configure the processor to:
• receive a location beacon transmitted from multiple base stations based at least in part on a transmission plan for a downlink location based services zone (D-LBS) in a signal subframe, frame or superframe structure, or combinations thereof, wherein the transmission plan comprises a pseudorandom transmission plan that includes spreading transmissions of the location beacon that are unique to respective base stations;
• partition a set of location beacons into a number of groups based at least in part on a number of resources available in the downlink location based services zone (D-LBS);
• reproduce the transmission plan at a receiver side to identify on which resources candidate base stations of the D-LBS zone transmit location beacons and perform measurement of signal location parameters for a set of neighboring base station;
• identify the base stations based at least in part on the respective location beacons and the transmission plan;
• measure signal location parameters of the identified base stations;
• and
• identify a present location based at least in part on the location beacons and the identities of the base stations from which the location beacons were received.

A method, comprising:

• configuring a transmission plan for a downlink location based services (D-LBS) zone based at least in part on resources available for transmission of location beacons, wherein the transmission plan partitions a set of location beacons into a number of groups based on a number of resources available in the downlink location based services zone, assigns different base stations for transmission on different resources of the D-LBS zone to perform measurements of signal location parameters from multiple base stations or relay stations, or combinations thereof, of a network, and assigns a location a beacon that belongs to particular station for transmission on a particular resource of the D-LBS zone using a cell identification number of that station;
• transmitting configuration parameters for the D-LBS zone from said configuring;
• and
• transmitting one or more location beacon signals on an assigned resource of the D-LBS zone in accordance with the D-LBS zone transmission plan if the cell identification of the station matches the station in the transmission plan.

A method, comprising:

• receiving a location beacon transmitted from multiple base stations based at least in part on a transmission plan for a downlink location based services zone (D-LBS) in a signal subframe, frame or superframe structure, or combinations thereof, wherein the transmission plan includes spreading transmissions of the location beacon that are unique to respective base stations, and comprises partitioning a set of location beacons into a number of groups based at least in part on a number of resources available in the downlink location based services zone (D-LBS), and reproducing the transmission plan at the receiver side to identify on which resources candidate base stations of the D-LBS zone transmit location beacons and to perform measurement of signal location parameters for the set of advertised neighboring base station;
• identifying the base stations based at least in part on matching a cell identification of a base station of a corresponding D-LBS zone resource on which a location beacon was received;
• measuring signal location parameters of the identified base stations;
• and
• identifying a present location based at least in part on the location beacons and the identities of the base stations from which the location beacons were received.