Method and apparatus for broadcasting position location data in a wireless communication system
DCFirst Claim
1. In a wireless communication system, a method for broadcasting position location data (PLD) from a base station to a plurality of terminals, comprising:
- classifying a plurality of messages used to convey a plurality of types of PLD information into a plurality of groups based on one or more characteristics of the PLD information, wherein the plurality of groups include first and second groups, and wherein the PLD information for the messages in the first group has longer longevity than the PLD information for the messages in the second group;
selecting a particular transmission scheme for each group of messages; and
broadcasting the messages in each group in accordance with the selected transmission scheme.
1 Assignment
Litigations
0 Petitions
Accused Products
Abstract
Techniques to efficiently broadcast position location data (PLD) from a base station to a number of terminals. In one aspect, PLD messages are classified into groups, and each group is broadcast in a different manner. For example, a first group of messages for PLD related to the base station is broadcast in an unscheduled format, and a second group of messages for PLD related to GPS satellites is broadcast in a scheduled format. In another aspect, a schedule for the second group describes the specific PLD elements selected for broadcast, their broadcast order, and the specific time intervals of their broadcast. The schedule is valid for a particular scheduled time interval, and the scheduling table is broadcast multiple times during the scheduled time interval to allow the terminals to quickly retrieve the schedule and ascertain what PLD information is being broadcast and where to look for specific PLD elements.
-
Citations
27 Claims
-
1. In a wireless communication system, a method for broadcasting position location data (PLD) from a base station to a plurality of terminals, comprising:
-
classifying a plurality of messages used to convey a plurality of types of PLD information into a plurality of groups based on one or more characteristics of the PLD information, wherein the plurality of groups include first and second groups, and wherein the PLD information for the messages in the first group has longer longevity than the PLD information for the messages in the second group;
selecting a particular transmission scheme for each group of messages; and
broadcasting the messages in each group in accordance with the selected transmission scheme. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9)
-
-
6. In a wireless communication system, a method for broadcasting position location data (PLD) from a base station to a plurality of terminals, comprising:
-
selecting one or more PLD elements for broadcast to the plurality of terminals, wherein each PLD element corresponds to a unit of PLD information of a particular type and for a particular transmitter;
defining a schedule for broadcasting the one or more selected PLD elements, wherein the schedule is valid for a particular scheduled time interval reater than 500 seconds;
forming a scheduling table representative of the defined schedule; and
broadcasting the scheduling table and the one or more selected PLD elements to the plurality of terminals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. In a wireless communication system, a method for broadcasting position location data (PLD) from a base station to a plurality of terminals, comprising;
-
selecting one or more PLD elements for broadcast to the plurality of terminals, wherein each PLD element corresponds to a unit of PLD information of a particular type and for a particular transmitter;
defining a schedule for broadcasting the one or more selected PLD elements;
forming a scheduling table representative of the defined schedule;
encapsulating the scheduling table and the one or more selected PLD elements into a composite message; and
broadcasting the composite message in accordance with the defined schedule. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. A base station in a wireless communication system, comprising:
-
a controller operative to select one or more PLD elements for broadcast, wherein each PLD element corresponds to a unit of PLD information of a particular type and for a particular transmitter, define a schedule for broadcasting the one or more selected PLD elements, and forming a scheduling table representative of the defined schedule; and
a transmit data processor coupled to the controller and operative to process the scheduling table and the one or more selected PLD elements for broadcast to the plurality of terminals;
wherein the schedule is indicative of the one or more selected PLD elements, their broadcast order, and specific time intervals for their broadcast, and wherein the schedule is valid for a particular scheduled time interval and the scheduling table is broadcast a plurality of times during the scheduled time interval. - View Dependent Claims (27)
-
Specification