[특허]Reverse link initial power setting using effective radiated power message to compute path loss

Reverse link initial power setting using effective radiated power message to compute path loss 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/00
출원번호	US-0401115 (2003-03-26)
등록번호	US-8509835 (2013-08-13)
발명자 / 주소	Nelson, Jr., George R. Proctor, Jr., James A. Hoffmann, John E. Rouphael, Antoine J.
출원인 / 주소	IPR Licensing, Inc.
대리인 / 주소	Volpe & Koenig, P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 73

초록 ▼

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.

대표청구항 ▼

1. A method for performing an access procedure in a subscriber unit comprising: transmitting at least one of a first type of signal to a base station wherein the first type of signal is associated with requesting access to a network associated with the base station and is transmitted at a first power level;receiving a first message from the base station in response to the base station receiving the at least one of the first type of signal, wherein the first message includes timing and power adjustment information for transmitting an access request message to the base station over an uplink shared channel and identification information associated with the subscriber unit;transmitting the access request message to the base station over the uplink shared channel in accordance with the timing and power adjustment information wherein the access request message includes a request for a communication link and the identification information associated with the subscriber unit wherein the access request message is a second type of message and is associated with requesting access to the network;receiving a second message from the base station in response to the access request message;determining whether the access request message sent by the subscriber unit was correctly received by the base station as a result of processing the second message; andon a condition that the first message is not received or the access request message was not correctly received by the base station, transmitting a second one of the first type of signal to the base station at a second power level wherein the second one of the first type of signal is associated with requesting access to the network associated with the base station. 2. The method of claim 1 further comprising retransmitting the signal on a condition that the processing of the second message indicates the access request message was not correctly received by the base station. 3. The method of claim 1 wherein a communication link is established on a condition that the processing of the second message indicates the access request message was correctly received by the base station. 4. The method of claim 3 wherein the established communication link is a bidirectional traffic communication link. 5. The method of claim 1 wherein the first message provides the identification information associated with the subscriber unit to include in the access request message. 6. A subscriber unit for performing an access procedure comprising: a transmitter configured to transmit at least one of a first type of signal to a base station wherein the first type of signal is associated with requesting access to a network associated with the base station and is transmitted at a first power level;a receiver configured to receive a first message from the base station in response to the base station receiving the at least one of the first type of signal, wherein the first message includes timing and power adjustment information for transmitting an access request message to the base station over an uplink shared channel and identification information associated with the subscriber unit wherein the access request message is a second type of message and is associated with requesting access to the network;the transmitter further configured to transmit the access request message to the base station over the uplink shared channel in accordance with the timing and power adjustment information wherein the access request message includes a request for a communication link and the identification information associated with the subscriber unit;the receiver further configured to receive a second message from the base station in response to the access request message;circuitry configured to determine whether the access request message transmitted by the subscriber unit was correctly received by the base station as a result of processing the second message; andthe transmitter further configured, on a condition that the first message is not received or the access request message was not correctly received by the base station, to transmit a second one of the first type of signal to the base station at a second power level wherein the second one of the first type of signal is associated with requesting access to the network associated with the base station. 7. The subscriber unit of claim 6 wherein the transmitter is further configured to retransmit the signal on a condition that the processing of the second message indicates the access request message was not correctly received by the base station. 8. The subscriber unit of claim 6 wherein a communication link is established on a condition that the processing of the second message indicates the access request message was correctly received by the base station. 9. The subscriber unit of claim 8 wherein the established communication link is a bidirectional traffic communication link. 10. The subscriber unit of claim 6 wherein the first message provides the identification information associated with the subscriber unit to include in the access request message.

이 특허에 인용된 특허 (73)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Reverse link initial power setting using effective radiated power message to compute path loss 원문보기

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Reverse link initial power setting using effective radiated power message to compute path loss 원문보기

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