Network support for paging channel and access channel optimization
View Patent ↗A method for conserving paging and access channel bandwidth is provided in a wireless network (A) that includes: a plurality of cells ( 32 ) served by a mobile switching center ( 20 ); a paging channel for paging a mobile station (MS) ( 40 ) located within the cells ( 32 ); and, an access channel by which the MS ( 40 ) registers with the network (A). The method includes: defining a first set of location areas (LAs) including a plurality of paging LAs ( 50 ), each paging LA ( 50 ) including a plurality of cells ( 32 ); and, defining a second set of LAs including a plurality of registration LAs ( 60 ), each registration LA ( 60 ) including a plurality of paging LAs ( 50 ). As the MS travels, it registers with the network when entering one registration LA ( 60 ) from another, but it does not register when entering one paging LA ( 50 ) from another within the same registration LA ( 60 ).
1. In a wireless telecommunications network comprising a plurality of cells served by a mobile switching center and including a paging channel for paging a mobile station located within the cells and an access channel by which the mobile station registers its location with the network, a method for conserving paging channel and access channel bandwidth, said method comprising:
(a) defining a first set of location areas including a plurality of paging location areas, each paging location area including a plurality of cells; and,
(b) defining a second set of location areas including a plurality of registration location areas, each registration location area including a plurality of the plurality of paging location areas;
wherein the mobile station registers via the access channel when entering one registration location area from another registration location area and does not register via the access channel when entering one paging location area from another paging location area within the same registration location area.
2. The method of claim 1 , wherein the plurality of cells within a paging location area are neighboring cells and the plurality of paging location areas within a registration location area are neighboring paging location areas.
3. The method of claim 1 , further comprising:
remembering when the mobile station last registered with the network.
4. The method of claim 3 , further comprising:
determining for the mobile station a location confidence value based upon how long ago the mobile station last registered with the network; and,
paging the mobile station within a paging area whose size depends upon the determined location confidence value for the mobile station.
5. The method of claim 4 , wherein the location confidence value is determined to be a first value if the last remembered registration is not older than a defined threshold and a second value if the last remembered registration is older than the defined threshold.
6. The method of claim 5 , wherein the paging area is smaller when the location confidence value for the mobile station is the first value as compared to when the location confidence value for the mobile station is the second value.
7. The method of claim 6 , further comprising:
remembering the cell that the mobile station last used to connect with the network.
8. The method of claim 7 , wherein when the location confidence value for the mobile station is the first value the paging area is the paging location area including the remembered cell that the mobile station last used to connect with the network.
9. The method of claim 7 , wherein when the location confidence value for mobile station is the second value the paging area is the registration location area including the remembered cell that the mobile station last used to connect with the network.
10. A wireless telecommunications network comprising:
a plurality of base stations defining a corresponding plurality of cells, said cells being partitioned into a first set of location areas and a second set of locations areas, the first set of location areas including a plurality of paging location areas each having a plurality of cells therein, and the second set of location areas including a plurality of registration location areas each having a plurality of the plurality of paging location areas therein;
a paging channel for paging a mobile station located within the cells; and,
an access channel by which the mobile station registers its location with the network, wherein the mobile station registers via the access channel when entering one registration location area from another registration location area and does not register via the access channel when entering one paging location area from another paging location area within the same registration location area.
11. The network of claim 10 , wherein the plurality of cells within a paging location area are neighboring cells and the plurality of paging location areas within a registration location area are neighboring paging location areas.
12. The network of claim 10 , further comprising:
a database that stores when the mobile station last registered with the network.
13. The network of claim 12 , wherein the mobile station is assigned a location confidence value based upon how long ago the mobile station last registered with the network, and the paging channel is used to page the mobile station within a paging area whose size depends upon the assigned value for the mobile station.
14. The network of claim 13 , wherein a first value is assigned if the last remembered registration is not older than a defined threshold and a second value is assigned if the last remembered registration is older than the defined threshold.
15. The network of claim 14 , wherein the paging area is smaller when the mobile station is assigned the first value as compared to when the mobile station is assigned the second value.
16. The network of claim 15 , wherein an identity of the cell that the mobile station last used to connect with the network is also stored in the database.
17. The network of claim 16 , wherein when the mobile station is assigned the first value the paging area is the paging location area including the cell that the mobile station last used to connect with the network.
18. The network of claim 16 , wherein when the mobile station is assigned the second value the paging area is the registration location area including the cell that the mobile station last used to connect with the network.