최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | UP-0183520 (2005-07-18) |
등록번호 | US-7746830 (2010-07-19) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 2 인용 특허 : 358 |
A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes
A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. Orthogonal subchannels are made available by the base station within each CDMA RF channel. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The number of orthogonal subchannels being allocated changes during a given session. The transceiver, when powered on but not actively sending data, provides an idling mode connection on a reverse link. The idling mode connection is based on an orthogonal subchannel shared with at least one other subscriber access unit, but utilizes different time slots of the shared orthogonal subchannel.
What is claimed is: 1. A subscriber access unit comprising: a transceiver configured to transmit Code Division Multiple Access (CDMA) signals, via a primary channel and at least one subchannel, each having different orthogonal codes; a bandwidth manager configured to dynamically adjust a number of
What is claimed is: 1. A subscriber access unit comprising: a transceiver configured to transmit Code Division Multiple Access (CDMA) signals, via a primary channel and at least one subchannel, each having different orthogonal codes; a bandwidth manager configured to dynamically adjust a number of available subchannels during a communications session, wherein each subchannel has a data rate that is less than a data rate of the primary channel; and the transceiver further configured to transmit a signal on a reverse link based on the at least one subchannel, wherein the transceiver is powered on but not transmitting traffic data. 2. The subscriber access unit as in claim 1, wherein the transceiver is further configured to transmit a heartbeat signal in a uniquely assigned time slot at a predetermined data rate to maintain bit synchronization when transmitting the signal. 3. The subscriber access unit as in claim 1, wherein the transceiver is configured to enter an active mode from an idle mode state by transmitting a command signal using its uniquely assigned time slot to request allocation of additional available subchannels. 4. The subscriber access unit as in claim 3, further comprising: at least one data buffer that is monitored, and the subscriber access unit is configured to determine when to transmit the command signal based on an information stored in the data buffer. 5. The subscriber access unit as in claim 3, wherein the bandwidth manager is further configured to monitor a forward access channel to determine when to return to the idle mode state. 6. The subscriber access unit as in claim 3, further comprising: at least one data buffer that is monitored on a condition that the subscriber access unit is in the active mode, to determine when to return to the idle mode state. 7. The subscriber access unit as in claim 3, further comprising: at least one data buffer that is monitored, and the subscriber access unit is configured to determine when to return to the idle mode state based on an information stored in the data buffer. 8. The subscriber access unit as in claim 1, wherein the transceiver is further configured to transmit a request to change the number of allocated subchannels dedicated thereto. 9. The subscriber access unit as in claim 8, wherein the number of allocated subchannels is increased, and the increased allocated subchannels have a predetermined relationship with a uniquely assigned time slot. 10. The subscriber access unit as in claim 1, wherein the transceiver is configured to receive feedback related to an adjustment of its transmit timing when active in an idle mode state. 11. The subscriber access unit as in claim 1, wherein the transceiver is configured to receive feedback related to an adjustment of its transmit power when active in an idle mode state. 12. A subscriber access unit comprising: a transceiver configured to transmit Code Division Multiple Access (CDMA) signals, via a primary channel and at least one subchannel, each having different orthogonal codes; a data buffer configured to store a subscriber access unit information; a bandwidth manager configured to dynamically adjust a number of available subchannels during a communications session; and the transceiver further configured to transmit a signal on a reverse link based on at least one other subscriber access unit utilizing different time slots of a shared subchannel, and to transmit in its uniquely assigned time slot a heartbeat signal during an idle mode state at a data rate that is less that a data rate of the primary channel, and wherein the subscriber access unit is configured to monitor the data buffer to determine whether an additional subchannel is required for an establishment of the reverse link. 13. The subscriber access unit as in claim 12, wherein the different time slots of the shared subchannel are uniquely assigned. 14. The subscriber access unit as in claim 13, wherein the transceiver is configured to enter an active mode from the idle mode state by transmitting a command signal using its uniquely assigned time slot to request allocation of additional available subchannels. 15. The subscriber access unit as in claim 14, further configured to determine when to transmit the command signal based on the information stored in the data buffer. 16. The subscriber access unit as in claim 14, wherein the bandwidth manager is further configured to monitor a forward access channel to determine when to return to the idle mode state. 17. The subscriber access unit as in claim 14, further comprising: at least one data buffer that is monitored on a condition that the subscriber access unit is in the active mode to determine when to return to the idle mode state. 18. The subscriber access unit as in claim 14, further configured to determine when to return to the idle mode state based on the information stored in the data buffer. 19. The subscriber access unit as in claim 12, wherein the transceiver is further configured to transmit a request to change the number of allocated subchannels dedicated thereto. 20. The subscriber access unit as in claim 19, wherein the number of allocated subchannels is increased, and the increased allocated subchannels have a predetermined relationship with a uniquely assigned time slot. 21. The subscriber access unit as in claim 12, wherein the transceiver is configured to receive feedback related to an adjustment of its transmit timing when active in the idle mode state. 22. The subscriber access unit as in claim 12, wherein the transceiver is configured to receive feedback related to an adjustment of its transmit power when active in the idle mode state.
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