Communication unit for access
First Claim
1. A base station for controlling transmission power during the establishment of communications between a base station and another communicating unit, comprising:
- means for detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels;
means for transmitting a power control signal when a sufficient periodic signal having a sufficient power for detection is received; and
means for receiving an access signal having a power level controlled by said power control signal.
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Accused Products
Abstract
A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
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Citations
179 Claims
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1. A base station for controlling transmission power during the establishment of communications between a base station and another communicating unit, comprising:
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means for detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels; means for transmitting a power control signal when a sufficient periodic signal having a sufficient power for detection is received; and means for receiving an access signal having a power level controlled by said power control signal. - View Dependent Claims (2)
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3. A base station for controlling transmission power during the establishment of communications between a base station and another communicating unit, comprising:
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means for detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels; means for transmitting a power control signal when a sufficient periodic signal having a sufficient power for detection is received; means for receiving an access signal having a power level controlled by said power control signal; and wherein said periodic signal comprises a short code and said access signal comprises an access code, which is longer than the short code. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A method of performing power control in a wireless CDMA communications system, the method comprising:
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transmitting, from a subscriber unit, a first code at successively increased power levels until the subscriber receives an acknowledgement that the first code has been received by the base station; and transmitting, from the subscriber unit, a second code after the acknowledgement has been received by the subscriber unit. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A subscriber unit for a wireless CDMA communications system including at least one base station, the subscriber unit comprising:
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a transmitter configured to transmit a first code at successively increased power levels until the subscriber receives an acknowledgement that the first code has been received by the base station; and the transmitter configured to transmit an access code after the acknowledgement has been received by the subscriber unit. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method of performing power control in a wireless CDMA communications system including at least one base station and at least one subscriber unit desiring access to the communication system, the method comprising:
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repeatedly transmitting, from the subscriber unit, a first code at successively increased power levels until the subscriber receives an acknowledgement that the first code has been detected by the base station, and transmitting from the subscriber unit an access code after the acknowledgement has been received by the subscriber unit. - View Dependent Claims (24, 25, 26, 27, 71)
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28. A method for performing power control in a wireless code division multiple access communication system, the method comprising:
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transmitting from a subscriber unit a first code at a set initial power level and repeating the transmitting of the first code at a first ramp up amount, said first code being a detection code wherein receipt of said first code indicates a base station has detected a subscriber unit desiring access to a wireless code division multiple access communication system; detecting at said subscriber unit an acknowledgement indicating the transmitted first code was received; and in response to detecting the acknowledgment, transmitting from said subscriber unit a second code at a power level that has a power offset from said first code by a second amount, wherein the second cods is an access code and the second code is associated with the first code. - View Dependent Claims (29, 30, 31, 32)
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33. A code division multiple access communication unit comprising:
a transmitter configured to repeatedly transmit a short code at increased power levels and configured to transmit a long code after repeatedly transmitting the short code, wherein the long code is longer than the short code. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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68. A code division multiple access communication unit comprising:
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a code generator configured to produce a code; a transmitter configured to transmit an access signal, the access signal including an access data message and the access signal produced using the code;
the transmitter configured to transmit at least one signal prior to the access signal, the at least one prior signal produced from the produced code and a transmission power level of the access signal is based on a transmission power level of the at least one prior signal. - View Dependent Claims (69, 70, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98)
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99. A code division multiple access communication unit comprising:
a transmitter configured to repeatedly transmit a first code, each repeated transmission of the first code is at an increased power level and the transmitter is configured to transmit a second code after the repeated transmitting of the first code, wherein the first code carries no access message data. - View Dependent Claims (100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133)
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134. A code division multiple access communication unit comprising:
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a transmitter configured to repeatedly transmit a first signal that does not carry access message data at increasing power levels; a receiver configured to receive an acknowledgement indicating that a last repeated transmission of the first signal was received; and the transmitter configured to cease the repeated transmission of the first signal in response to receipt of the acknowledgement. - View Dependent Claims (135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165)
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166. A code division multiple access communication unit comprising:
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a transmitter configured to transmit a first signal that does not carry access message data; a receiver configured to receive an acknowledgement indicating that a last periodic transmission of the first signal was received; and the transmitter configured to retransmit the first signal at an increased power level when the acknowledgement is not received and to not retransmit the first signal when the acknowledgement is received. - View Dependent Claims (167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179)
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Specification