Multiple base station monitoring of digital paging channel to reduce an occurrence of missed pages by a mobile station
AssigneeNokia Corporation
InventorTao He
Life of this patent
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Abstract
This invention provides a method to operate a mobile station (60) and a mobile station that operates in accordance with the method. The method includes: (a) simultaneously demodulating a digital paging channel (DPCH) from individual ones of N base stations using a plurality of fingers (78), where N is greater than one; (b) soft combining (82A,82B) the outputs of those fingers that receive the DPCH from an individual one of the N base stations and storing the combined soft outputs in an individual one of N buffers (84A,84B); and (c) separately decoding (90) the content of each of the N buffers to determine if a page for the mobile station was received from at least one of the N base stations.
Claims15
A method to operate a mobile station, comprising:
- simultaneously demodulating a digital paging channel DPCH from individual ones of N base stations using a plurality of fingers, where N is greater than one;
- soft combining the outputs of those fingers that receive the DPCH from an individual one of the N base stations and storing the combined soft outputs in an individual one of N buffers;
- and
- separately decoding the content of each of the N buffers to determine if a page for the mobile station was received from at least one of the N base stations.
A mobile station, comprising:
- a radio frequency receiver for simultaneously receiving a digital paging channel from individual ones of N base stations, where N is greater than one;
- coupled to an output of said RF receiver, a plurality of pseudonoise PN code demodulators for simultaneously demodulating said digital paging channel DPCH received from individual ones of said N base stations;
- coupled to outputs of said PN demodulators, N soft combiners for soft combining said outputs of those PN code demodulators that receive said DPCH from an individual one of said N base stations;
- coupled to an output of each of said N soft combiners, one of N buffers for storing said combined soft outputs received from one of said N base stations;
- sequentially coupled to an output of each of said N buffers, a decoder for separately decoding said content of each of said N buffers to provide decoded data;
- and
- a controller having an input coupled to an output of said decoder for determining from said decoded data if a page for said mobile station was received from at least one of said N base stations.
A Spread Spectrum (SS), Code Division Multiple Access (CDMA) mobile station, comprising:
- a radio frequency receiver for periodically receiving, in accordance with an assigned slot index value, a digital paging channel simultaneously from individual ones of N base stations, where N is greater than one;
- coupled to an output of said RF receiver, a plurality of pseudonoise PN code demodulators for simultaneously demodulating said digital paging channel DPCH received from individual ones of said N base stations;
- coupled to outputs of said PN demodulators, N soft combiners for soft combining said outputs of those PN code demodulators that receive said DPCH from an individual one of said N base stations;
- coupled to an output of each of said N soft combiners, one of N buffers for storing said combined soft outputs received from one of said N base stations;
- coupled to an output of each of said N buffers, a multiplexer for sequentially outputting a content of each of said N buffers;
- coupled to an output of said multiplexer, a decoder for sequentially decoding said content of each of said N buffers to provide decoded data;
- and
- a controller having an input coupled to an output of said decoder for determining from said decoded data if a page for said mobile station was received from at least one of said N base stations.
Dependencies are inferred from the claim text.