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US 2003/0114132 A1Published application
Reliable decoding of quick paging channel in IS2000 handsets
AssigneeKoninklijke Philips Electronics N.V.
InventorLin Yue
Life of this patent
Estimating the term…
Abstract
Reliable decoding of quick paging channel is provided using first and second page indicators carried in a quick paging channel of a wireless communication system. First and second threshold values are established to determine whether the first and the second page indicators each, as received from a base station to a mobile station, is highly reliable, reasonably reliable, or unreliable. Preferably, the pilot strengths for the first and the second page indicators each is compared with the first and the second page indicators. Depending on the level of reliability of the first and the second page indicators, different actions are taken to determine whether the mobile station enters a sleep mode or decodes a next paging channel slot.
Claims25
In a wireless communication system, wherein a paging channel, a quick paging channel, and a pilot channel are employed to transmit messages from a base station to a mobile station, the quick paging channel including first and second page indicators, a method comprising the steps of:
- determining if the strength of a first pilot signal is smaller than a first threshold value, the first pilot signal residing in the pilot channel and being associated with the first page indicator;
- determining if the strength of the first pilot signal is larger than a second threshold value, the first threshold value being larger than the second threshold value;
- determining if the strength of a second pilot signal is smaller than the first threshold value, the second pilot signal residing in the pilot channel and being associated with the second page indicator;
- determining if the strength of the second pilot signal is larger than the second threshold value;
- if the strength of the first pilot signal is not smaller than the first threshold value, processing the first page indicator, and determining if the first page indicator is detected to be on;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the first pilot signal is larger than the first threshold value, saving a first soft decision for the first page indicator;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not smaller than the first threshold value, processing the second page indicator, and determining if the second page indicator is detected to be on;
- and
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is larger than the second threshold value, saving a second soft decision for the second page indicator, combining the first and the second soft decisions to obtain a combined decision, and determining if the combined decision is on.
6 more elements
In a wireless communication system, wherein a paging channel, a quick paging channel, and a pilot channel are employed to transmit messages from a base station to a mobile station, the quick paging channel including first and second page indicators, the pilot channel including first and second pilot signals, the first pilot signal being associated with the first page indicator, the second pilot signal being associated with the second page indicator, a method comprising the steps of:
- determining if the strength of the first pilot signal is smaller than a first threshold value;
- determining if the strength of the first pilot signal is larger than a second threshold value, the first threshold value being larger than the second threshold value;
- determining if the strength of the second pilot signal is smaller than the first threshold value;
- determining if the strength of the second pilot signal is larger than the second threshold value;
- if the strength of the first pilot signal is not smaller than the first threshold value, processing the first page indicator, and determining if the first page indicator is detected to be on;
- if the strength of the first pilot signal is not smaller than the first threshold value, and if the first page indicator is detected to be on, decoding a subsequent paging channel slot;
- if the strength of the first pilot signal is not smaller than the first threshold value, and if the first page indicator is detected to be off, switching the mobile station to a sleep mode;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the first pilot signal is larger than the first threshold value, saving a first soft decision for the first page indicator;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not smaller than the first threshold value, processing the second page indicator, and determining if the second page indicator is detected to be on;
- if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is not smaller than the first threshold value, and if the second page indicator is detected to be on, decoding the subsequent paging channel slot;
- if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is not smaller than the first threshold value, and if the second page indicator is detected to be off, switching the mobile station to a sleep mode;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not larger than the second threshold value, decoding the subsequent paging channel slot;
- if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is larger than the second threshold value, saving a second soft decision for the second page indicator, combining the first and the second soft decisions to obtain a combined decision, and determining if the combined decision is on;
- if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is larger than the second threshold value, and if the combined decision is on, decoding the subsequent paging channel slot;
- and
- the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is larger than the second threshold value, and if the combined decision is off, switching the mobile station to a sleep mode.
13 more elements
A wireless communication system comprising:
- a base station and at least one mobile station in communication to define:
- a paging channel;
- a quick paging channel;
- first and second page indicators within the quick paging channel;
- and
- one or more processors implemented in the at least one mobile station for comparing the pilot strength for the first page indicator with first and second threshold values, for comparing the pilot strength for the second page indicator with the first and the second threshold values, and for determining if the first and the second page indicators are reliably transmitted from the base station to the at least one mobile station, based on the pilot strength for the first and the second page indicators relative to the first and the second threshold values.
3 more elements
In a wireless communication system, wherein a paging channel, a quick paging channel, and a pilot channel are employed to transmit messages from a base station to a mobile station, the quick paging channel including first and second page indicators, a method comprising the steps of:
- comparing the pilot strength for the first page indicator with first and second threshold values;
- comparing the pilot strength for the second page indicator with the first and the second threshold values;
- and
- determining if the first and the second page indicators are reliably transmitted from the base station to the mobile station, based on the pilot strength for the first and the second page indicators relative to the first and the second threshold values.
1 more element
In a wireless communication system, wherein a paging channel, a quick paging channel, and a pilot channel are employed to transmit messages from a base station to a mobile station, the quick paging channel including first and second page indicators, the mobile station comprising:
- processor means for determining if the strength of a first pilot signal is smaller than a first threshold value, the first pilot signal residing in the pilot channel and being associated with the first page indicator;
- processor means for determining if the strength of the first pilot signal is larger than a second threshold value, the first threshold value being larger than the second threshold value;
- processor means for determining if the strength of a second pilot signal is smaller than the first threshold value, the second pilot signal residing in the pilot channel and being associated with the second page indicator;
- processor means for determining if the strength of the second pilot signal is larger than the second threshold value;
- processor means for processing the first page indicator, and determining if the first page indicator is detected to be on, if the strength of the first pilot signal is not smaller than the first threshold value;
- processor means for saving a first soft decision for the first page indicator, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the first pilot signal is larger than the first threshold value;
- processor means for processing the second page indicator, and determining if the second page indicator is detected to be on, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not smaller than the first threshold value;
- and
- processor means for saving a second soft decision for the second page indicator, combining the first and the second soft decisions to obtain a combined decision, and determining if the combined decision is on, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is larger than the second threshold value.
6 more elements
In a wireless communication system, wherein a paging channel, a quick paging channel, and a pilot channel are employed to transmit messages from a base station to a mobile station, the quick paging channel including first and second page indicators, the mobile station comprising:
- processor means for determining if the strength of a first pilot signal is smaller than a first threshold value, the first pilot signal residing in the pilot channel and being associated with the first page indicator;
- processor means for determining if the strength of the first pilot signal is larger than a second threshold value, the first threshold value being larger than the second threshold value;
- processor means for determining if the strength of a second pilot signal is smaller than the first threshold value, the second pilot signal residing in the pilot channel and being associated with the second page indicator;
- processor means for determining if the strength of the second pilot signal is larger than the second threshold value;
- processor means for processing the first page indicator, and determining if the first page indicator is detected to be on, if the strength of the first pilot signal is not smaller than the first threshold value;
- processor means for saving a first soft decision for the first page indicator, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the first pilot signal is larger than the first threshold value;
- processor means for processing the second page indicator, and determining if the second page indicator is detected to be on, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not smaller than the first threshold value;
- processor means for saving a second soft decision for the second page indicator, combining the first and the second soft decisions to obtain a combined decision, and determining if the combined decision is on, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is larger than the second threshold value;
- processor means for decoding a subsequent paging channel slot, if the strength of the first pilot signal is not smaller than the first threshold value, and if the first page indicator is detected to be on;
- processor means for switching the mobile station to a sleep mode, if the strength of the first pilot signal is not smaller than the first threshold value, and if the first page indicator is detected to be off;
- processor means for decoding the subsequent paging channel slot, if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is not smaller than the first threshold value, and if the second page indicator is detected to be on;
- processor means for switching the mobile station to a sleep mode, if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is not smaller than the first threshold value, and if the second page indicator is detected to be off;
- processor means for decoding the subsequent paging channel slot, if the strength of the first pilot signal is smaller than the first threshold value, and if the strength of the second pilot signal is not larger than the second threshold value;
- processor means for decoding the subsequent paging channel slot, if the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is larger than the second threshold value, and if the combined decision is on;
- and
- processor means for, the strength of the first pilot signal is smaller than the first threshold value, if the strength of the second pilot signal is larger than the second threshold value, and if the combined decision is off, switching the mobile station to a sleep mode.
13 more elements
Dependencies are inferred from the claim text.