Forward link supervision for packet data users in a wireless communication network
First Claim
1. A method of forward link supervision in a wireless communication network comprising:
- receiving a signal at a mobile station that is transmitted by the network to the mobile station on a forward link communication channel;
determining whether the received signal has sufficient or insufficient signal quality by measuring energy of the received signal; and
suspending reverse link transmission by the mobile station if the received signal has insufficient signal quality for a first time period.
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Accused Products
Abstract
A method and apparatus for link supervision determines whether a link signal is present or absent by measuring received energy for that signal. If the measured energy for the signal does not meet a defined energy threshold according to defined evaluation criteria, such as a sufficiency metric, the signal is deemed absent. Applied to wireless communication networks, such supervision may be used to suspend or terminate transmission responsive to detecting the link signal'"'"'s absence. In an exemplary embodiment for 1×EV-DV (cdma2000 Revision C) wireless networks, a mobile station selectively performs forward link supervision based on measuring the bit energy of power control bits received by the mobile on a dedicated power control sub-channel. If a fundicated channel is assigned to the mobile station, it may perform forward link supervision based on Frame Error Rate (FER) estimations for data received on the fundicated channel rather than the energy-based approach.
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Citations
61 Claims
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1. A method of forward link supervision in a wireless communication network comprising:
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receiving a signal at a mobile station that is transmitted by the network to the mobile station on a forward link communication channel;
determining whether the received signal has sufficient or insufficient signal quality by measuring energy of the received signal; and
suspending reverse link transmission by the mobile station if the received signal has insufficient signal quality for a first time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of supervising a communication link between first and second transceivers in a wireless communication network, wherein the first transceiver transmits a signal on a communication channel associated with the link to be supervised, the method comprising:
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receiving the signal at the second transceiver;
measuring energy of the received signal at the second transceiver;
determining whether the measured energy satisfies a sufficiency metric; and
characterizing the communication link as unavailable if the measured energy does not satisfy the sufficiency metric. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A mobile station for use in a wireless communication network, the mobile station comprising:
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a transceiver unit to receive signals on a forward link from the network and transmit signals on a reverse link to the network;
control logic to supervise the forward link on an energy-basis by detecting an abnormal forward link condition based on;
receiving a signal transmitted by the network on the forward link;
measuring energy of the received signal; and
detecting the abnormal forward link condition by determining whether the measured energy meets a sufficiency metric. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A mobile station for use in a wireless communication network, the mobile station comprising:
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a transceiver unit to receive signals on a forward link from the network and transmit signals on a reverse link to the network; and
control logic to perform forward link supervision on an error-rate basis using a fundicated channel signal from the network if available, and on a signal-energy basis using a power control channel signal from the network if a fundicated channel signal is not available. - View Dependent Claims (56, 57, 58, 59, 60, 61)
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Specification