US6434367B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Using decoupled power control sub-channel to control reverse-link channel power
Assignee: Nokia of America Corp
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Filing: 1999-06-11
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Granted: 2002-08-13
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Expires: 2019-06-11
Abstract
Abstract In a wireless communications system, a base station transmits power control signals (e.g., the power control bits of a power control sub-channel) to a mobile using a forward-link channel that is decoupled from all other signals transmitted from that base station to that mobile. For example, the decoupled forward-link channel may be a common power control channel. The mobile then uses the power control signals received in the decoupled forward-link channel to control its power level for transmitting one or more reverse-link channels to the base station. The ability of base stations to use decoupled forward-link channels in order to transmit their power control signals to a mobile enables a mobile to operate with different active sets for the forward and reverse links. This enables forward-link data traffic to be implemented using a simplex mode, even when the mobile is operating in soft handoff in the reverse link. This in turn greatly reduces the reactivation time involved in transitioning a mobile from the suspended state to the active state, which is particularly desirable for bursty (i.e., intermittent) packet data flow, as opposed to continuous circuit-oriented voice messaging.
Inventors
- 👤 Sarath Kumar
- 👤 Quinn Li
- 👤 Xiao C. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/14; H04W52/143; H04W52/146; H04W52/38; H04W52/40; H04W52/54; H04W52/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
114 words
A wireless communications method, comprising the steps of: (a) beginning to receive, at a first base station of a wireless communications system, a reverse-link channel; (b) then transmitting, by the first base station, a forward-link power control signal of a power control sub-channel corresponding to the reverse-link channel using a forward-link channel that 1) is decoupled from any other forward-link channel transmission by the base station for the corresponding reverse-link channel and 2) is a common power control channel of two or more base stations; and (c) providing, if at least one other base station transmits a forward-link power control signal for the corresponding reverse-link channel, asymmetric power control for the reverse link channel.
Claim 2
Dependent Claim
114 words
A wireless communications method, comprising the steps of: (a) beginning to receive, at a first base station of a wireless communications system, a reverse-link channel; (b) then transmitting, by the first base station, a forward-link power control signal of a power control sub-channel corresponding to the reverse-link channel using a forward-link channel that 1) is decoupled from any other forward-link channel transmission by the base station for the corresponding reverse-link channel and 2) is a common power control channel of two or more base stations; and (c) providing, if at least one other base station transmits a forward-link power control signal for the corresponding reverse-link channel, asymmetric power control for the reverse link channel.
Claim 3
Dependent Claim
14 words
The invention of claim 1 , wherein the communications system is a CDMA system.
Claim 4
Dependent Claim
15 words
The invention of claim 2 , wherein the CDMA system conforms to a cdma2000 standard.
Claim 5
Dependent Claim
73 words
The invention of claim 1 , wherein the one or more reverse-link channels are received from a mobile and the power control signals comprise power control bits, wherein one bit value is designed to instruct the mobile to decrease a transmit power level for the one or more reverse-link channels and another bit value is designed to instruct the mobile to increase the transmit power level for the one or more reverse-link channels.
Claim 6
Dependent Claim
43 words
The invention of claim 1 , wherein the one or more reverse-link channels are received from a mobile and an active set for the forward link for the mobile is different from a corresponding active set for the reverse link for the mobile.
Claim 7
Dependent Claim
109 words
The invention of claim 5 , wherein: the first base station transmits only the decoupled forward-link channel corresponding to the mobile; a second base station of the wireless communications system transmits one or more forward-link channels corresponding to the mobile, wherein the one or more forward-link channels comprise power control signals corresponding to the second base station; the first and second base stations receive and process the one or more reverse-link channels transmitted by the mobile; and the power control signals transmitted by the first and second base stations are designed to instruct the mobile how to control a transmit power level for the one or more reverse-link channels.
Claim 8
Dependent Claim
35 words
The invention of claim 6 , wherein the one or more forward-link channels transmitted by the second base station comprises a second decoupled forward-link channel comprising power control signals corresponding to the second base station.
Claim 9
Dependent Claim
35 words
The invention of claim 6 , wherein the one or more forward-link channels transmitted by the second base station comprises a forward-link traffic channel with punctured power control signals corresponding to the second base station.
Claim 10
Dependent Claim
33 words
The invention of claim 6 , wherein the second base station transmits only a second decoupled forward-link channel corresponding to the mobile and comprising power control signals corresponding to the second base station.
Claim 11
Dependent Claim
42 words
The invention of claim 6 , wherein the second base station is a primary base station, the first base station is a secondary base station, and the primary and secondary base stations are operating in reverse-link soft handoff corresponding to the mobile.
Claim 12
Dependent Claim
43 words
The invention of claim 1 , wherein the one or more reverse-link channels are received from a mobile and the power control signals are designed to instruct the mobile how to control a transmit power level for the one or more reverse-link channels.
Claim 13
Dependent Claim
110 words
A wireless communications system comprising a first base station configured to: (a) begin to receive and process a reverse-link channel; and (b) then transmit, by the first base station, a forward-link power control signal of a power control sub-channel corresponding to the reverse-link channel using a forward-link channel that 1) is decoupled from any other forward-link channel transmission by the base station for the corresponding reverse-link channel and 2) is a common power control channel of two or more base stations; and (c) providing, if at least one other base station transmits a forward-link power control signal for the corresponding reverse-link channel, asymmetric power control for the reverse link channel.
Claim 14
Dependent Claim
110 words
A wireless communications system comprising a first base station configured to: (a) begin to receive and process a reverse-link channel; and (b) then transmit, by the first base station, a forward-link power control signal of a power control sub-channel corresponding to the reverse-link channel using a forward-link channel that 1) is decoupled from any other forward-link channel transmission by the base station for the corresponding reverse-link channel and 2) is a common power control channel of two or more base stations; and (c) providing, if at least one other base station transmits a forward-link power control signal for the corresponding reverse-link channel, asymmetric power control for the reverse link channel.
Claim 15
Dependent Claim
14 words
The invention of claim 12 , wherein the communications system is a CDMA system.
Claim 16
Dependent Claim
15 words
The invention of claim 13 , wherein the CDMA system conforms to a cdma2000 standard.
Claim 17
Dependent Claim
73 words
The invention of claim 12 , wherein the one or more reverse-link channels are received from a mobile and the power control signals comprise power control bits, wherein one bit value is designed to instruct the mobile to decrease a transmit power level for the one or more reverse-link channels and another bit value is designed to instruct the mobile to increase the transmit power level for the one or more reverse-link channels.
Claim 18
Dependent Claim
43 words
The invention of claim 12 , wherein the one or more reverse-link channels are received from a mobile and an active set for the forward link for the mobile is different from a corresponding active set for the reverse link for the mobile.
Claim 19
Dependent Claim
109 words
The invention of claim 16 , wherein: the first base station transmits only the decoupled forward-link channel corresponding to the mobile; a second base station of the wireless communications system transmits one or more forward-link channels corresponding to the mobile, wherein the one or more forward-link channels comprise power control signals corresponding to the second base station; the first and second base stations receive and process the one or more reverse-link channels transmitted by the mobile; and the power control signals transmitted by the first and second base stations are designed to instruct the mobile how to control a transmit power level for the one or more reverse-link channels.
Claim 20
Dependent Claim
35 words
The invention of claim 17 , wherein the one or more forward-link channels transmitted by the second base station comprises a second decoupled forward-link channel comprising power control signals corresponding to the second base station.
Claim 21
Dependent Claim
35 words
The invention of claim 17 , wherein the one or more forward-link channels transmitted by the second base station comprises a forward-link traffic channel with punctured power control signals corresponding to the second base station.
Claim 22
Dependent Claim
33 words
The invention of claim 17 , wherein the second base station transmits only a second decoupled forward-link channel corresponding to the mobile and comprising power control signals corresponding to the second base station.
Claim 23
Dependent Claim
42 words
The invention of claim 17 , wherein the second base station is a primary base station, the first base station is a secondary base station, and the primary and secondary base stations are operating in reverse-link soft handoff corresponding to the mobile.
Claim 24
Dependent Claim
43 words
The invention of claim 12 , wherein the one or more reverse-link channels are received from a mobile and the power control signals are designed to instruct the mobile how to control a transmit power level for the one or more reverse-link channels.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-08-12 | 2006-02-11 | 2006-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-08-12 | 2010-02-11 | 2010-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-08-12 | 2014-02-11 | 2014-08-13 | $7700.00 | Window Closed / Lapsed |