초록 ▼

A communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers allows the base station to identify t

A communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers allows the base station to identify the request markers using alternative criteria with a low probability of error, where the alternative criteria may include comparing the markers to respective energy level thresholds, monitoring occupancy of time slots, occupancy of mutually exclusive code channels, or combinations thereof. For example, in one particular embodiment, a request marker, which is generally a high priority marker, is transmitted with higher power, which improves the probability of detection and reduces the probability of false detection of the request marker.

대표청구항 ▼

1. Wireless communication processing elements operable within a field unit of a wireless communications system, the wireless communication processing elements comprising: a heartbeat channel processor;a request channel processor;a transmitter; anda receiver;wherein the transmitter is configured to t

1. Wireless communication processing elements operable within a field unit of a wireless communications system, the wireless communication processing elements comprising: a heartbeat channel processor;a request channel processor;a transmitter; anda receiver;wherein the transmitter is configured to transmit a first signal having one of a plurality of formats in which at least two of the formats have a different power offset;wherein the heartbeat channel processor causes the transmitter to transmit a heartbeat signal via the first signal in response to the field unit not having an allocation of traffic data resources, the heartbeat signal to maintain timing and power control and provide an indication of presence within the wireless communications system;wherein the request channel processor is configured to cause the transmitter to transmit the heartbeat signal in a format from among the at least two formats associated with a request on a condition that the field unit requires an allocation of traffic data resources; andwherein the receiver is to, in response to the request, receive an allocation of traffic data resources for the field unit; andwherein the receiver is to further cause the transmitter to transmit reverse link data in response to the allocation in a time interval including at least one time slot. 2. The wireless communication processing elements of claim 1, wherein the heartbeat channel processor and the request channel processor are both part of the same wireless communication processing elements of the field unit. 3. The wireless communication processing elements of claim 1: wherein the receiver is further configured to receive power commands and adjust a transmission power level of the first signal in response to the power commands. 4. The wireless communication processing elements of claim 1: wherein the request channel processor to cause the transmitter to transmit the heartbeat signal in a format from among the at least two formats associated with a request comprises the request channel processor causing the transmitter to transmit a heartbeat-with-request-signal from the field unit via a first one of the at least two formats having different power offsets. 5. The wireless communication processing elements of claim 1: wherein the plurality of formats include the first of the at least two formats having a first power level corresponding to a heart beat signal without a request and a second of the at least two formats having a second power level corresponding to a heartbeat-with-request-signal, the second power level being different than the first power level. 6. The wireless communication processing elements of claim 1: wherein the heartbeat channel processor and request channel processor further implement a feedback loop;wherein the feedback loop uses a command or message to transfer information from the wireless communication system to the field unit; andwherein the receiver is to receive the command or message from the wireless communication system adjusting energy levels utilized for the heartbeat and request signals. 7. The wireless communication processing elements of claim 1, wherein the power offsets are in fixed dB values. 8. The wireless communication processing elements of claim 1, wherein the first signal with the format associated with the request is derived from at least an orthogonal code. 9. The wireless communication processing elements of claim 1, wherein the first signal with the format associated with the request comprises one of a modulated message or a coded pilot signal with no bits and without use of a modulated bit. 10. The wireless communication processing elements of claim 1, wherein the transmitter is configured to transmit the first signal comprises the transmitter begin configured to only transmit the first signal on the a condition that timing for the reverse link data is maintained within the wireless communications system. 11. The wireless communication processing elements of claim 1, wherein the at least two formats having different power offsets include at least a control hold state indication signal having a first energy level and a request to go active state indication signal having a second energy level different than the first energy level. 12. The wireless communication processing elements of claim 1, wherein the wireless communication processing elements utilize a difference in power levels in support of the request, wherein the request comprises a request to go active by the wireless communication processing elements on behalf of the field unit. 13. The wireless communication processing elements of claim 12, wherein the request to go active by the wireless communication processing elements utilize both the difference in power levels and a repetition of the pulses to indicate the request to go active. 14. The wireless communication processing elements of claim 1, wherein the wireless communication system is to differentiate between a control hold state indication signal and a request to go active signal transmitted by the wireless communication processing elements on behalf of the field unit by: (i) measuring energy levels of the control hold state indication signal and the request to go active signal; and(ii) comparing the energy levels against at least one threshold. 15. The wireless communication processing elements of claim 14, wherein the different energy levels of the control hold state indication signal and the request to go active signal operate as one or more of a duty cycle of the signals, a frequency of the signals, a power of the signals, or a signaling structure for the signals. 16. The wireless communication processing elements of claim 1, wherein the wireless communication system is to determine the request to go active signal transmitted by the wireless communication processing elements on behalf of the field unit is present within a mutually exclusive code channel in a time slot when the heartbeat signal is at a logical zero. 17. A wireless communications system comprising: a plurality of field units;a base station to wirelessly communicate with each of the plurality of field units; andwherein each of the plurality of field units have embedded therein wireless communication processing elements comprising at least: (i) a heartbeat channel processor,(ii) a request channel processor,(iii) a transmitter, and(iv) a receiver,wherein the transmitter of each field unit is configured to transmit a first signal having one of a plurality of formats in which at least two of the formats have a different power offset;wherein the heartbeat channel processor of each field unit causes the transmitter to transmit a heartbeat signal via the first signal in response to the respective field unit not having an allocation of traffic data resources, the heartbeat signal to maintain timing and power control and provide an indication of presence for the respective field unit within the wireless communications system;wherein the request channel processor of each field unit is configured to cause the transmitter of the respective field unit to transmit the heartbeat signal in a format from among the at least two formats associated with a request on a condition that the respective field unit requires an allocation of traffic data resources; andwherein the receiver of each field unit is to, in response to the request, receive an allocation of traffic data resources for the respective field unit; andwherein the receiver of each field unit is to further cause the transmitter of the respective field unit to transmit reverse link data in response to the allocation in a time interval including at least one time slot. 18. The wireless system of claim 17: wherein the plurality of formats include the first of the at least two formats having a first power level corresponding to a heart beat signal without a request and a second of the at least two formats having a second power level corresponding to a heartbeat-with-request-signal, the second power level being different than the first power level.