摘要:
A downlink communication is transmitted/received in at least one downlink time slot. In response to the received downlink communication, an acknowledgement message is received/transmitted in an uplink time slot a fixed integer number of uplink time slots after transmission/reception of the received downlink communication. The uplink and downlink time slots are staggered by substantially a half of a time slot.
摘要:
A method and apparatus for dynamic uplink communication in a wireless communication system are disclosed herein. The method includes transmitting, by a base station, a pilot signal on a first channel to a mobile station (MS), the pilot signal indicating a signal strength, receiving, by the MS, a one-bit indicator from a plurality of base stations on a second channel, the one-bit indicator indicating a congestion status for each of the plurality of base stations, determining, by the MS, the congestion status for each of the plurality of base stations, and selecting, by the MS, a base station based on the one-bit indicator received on the second channel, wherein the one-bit indicator further indicates a neighboring base station that is lightly congested.
摘要:
A field unit includes circuitry configured to receive a signal and determine whether the received signal has a predetermined quality; circuitry configured to select a signal from a plurality of signals including a first signal indicating that the field unit is requesting an assignment of resources and the received signal was received with the predetermined quality, a second signal indicating that the field unit is requesting an assignment of resources and the received signal was not received with the predetermined quality, a third signal indicating that the field unit is not requesting an assignment of resources and the received signal was received with the predetermined quality, and a fourth signal indicating that the field unit is not requesting an assignment of resources and the received signal was not received with the predetermined quality; and circuitry configured to transmit the selected signal over a control channel.
摘要:
Method and apparatus for base stations and subscriber units allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another base station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.
摘要:
In an illustrative embodiment of the present invention, a reference signal including pilot information is transmitted from a base station to one or multiple field units over a pilot channel. A message is also sent to the field units over a paging channel to indicate an effective radiated power level at which the reference signal is transmitted on the pilot channel. Based on a received power level of the reference signal at a field unit and the effective radiated power level of the reference signal, a forward path loss is estimated at the field unit for the forward link between the base station and field unit. Assuming the path loss in the reverse link is approximately the same as the estimated forward link path loss, the field unit can transmit, a reply message in the reverse link so that the base station generally receives a message at-a desired power level.
摘要:
A method and apparatus for dynamic uplink communication in a wireless communication system are disclosed herein. The method includes receiving, by the mobile station, a first channel from a first base station, wherein the first channel includes an indication, wherein the indication has one of two states, wherein the base station transmits on forward link channels including a pilot channel, traffic channels and the first channel. The method also includes receiving, by the mobile station, a communication from the first base station on a condition that the indication has a first state of the two states, and selecting, by the mobile station, a second base station based on received pilot signals from a plurality of base stations on a condition that the indication has a second state of the two states.
摘要:
An apparatus and method for use with a shared access communication channel is disclosed. A wireless network device receives signals and recovers data from a first plurality of subscriber units and a second plurality of subscriber units in a time interval. Received signals from the first plurality of subscriber units are distinguishable by having unique pseudo noise (PN) sequence with respect to others of the first plurality of subscriber units. Received signals the second plurality of subscriber units are distinguishable by a unique orthogonal sequence with respect to others of the second plurality of subscriber units. Received signals are distinguished between the first and second plurality of subscriber units based on detection of an orthogonal sequence present only in the received signals from the second plurality of subscriber units.
摘要:
A downlink communication is transmitted/received in at least one downlink time slot. In response to the received downlink communication, an acknowledgement message is received/transmitted in an uplink time slot a fixed integer number of uplink time slots after transmission/reception of the received downlink communication. The uplink and downlink time slots are staggered by substantially a half of a time slot.
摘要:
A subscriber unit performs power control of a reverse link by sending heartbeat messages to a base station, permitting the base station to determine a reverse link quality report. Using a reverse link quality report message received from the base station, the subscriber unit calculates its reverse power level and maintains the reverse power level during the standby state.
摘要:
A field unit includes circuitry configured to receive a signal and determine whether the received signal has a predetermined quality; circuitry configured to select a signal from a plurality of signals including a first signal indicating that the field unit is requesting an assignment of resources and the received signal was received with the predetermined quality, a second signal indicating that the field unit is requesting an assignment of resources and the received signal was not received with the predetermined quality, a third signal indicating that the field unit is not requesting an assignment of resources and the received signal was received with the predetermined quality, and a fourth signal indicating that the field unit is not requesting an assignment of resources and the received signal was not received with the predetermined quality; and circuitry configured to transmit the selected signal over a control channel.