Patent EP0887948A2 successfully refreshed from Google Patents.
EP0887948A2
Expired / Lapsed
EP
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Power control and data services in CDMA networks
Assignee: Intellectual Ventures I LLC
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Filing: 1998-06-26
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Granted: —
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Expires: 2018-06-26
Abstract
Abstract This invention applies to a mobile station that is able to determine a required data rate based on data buffer usage. If the data buffer indicates a requirement for a high data rate transmission, the mobile station sends a request to a base station to be assigned multiple parallel code channels. If the multiple parallel code channels are granted, the mobile station uses the channels for transmitting data to the base station until either the data buffer becomes empty, or a base station time-out occurs, or the mobile station is signalled by the base station to reduce its data transmission rate, whichever occurs first. The mobile station of this invention is enabled to autonomously control the data rate during an assigned period for high speed transmission, so as to lower the data rate when needed for the purpose of improving coverage and/or to avoid operating in a power limited condition, thereby degrading link quality. The data rate is lowered by disabling transmission though at least one parallel code channel, and subsequently resuming transmission though the code channel when conditions warrant. This provides a discontinuous transmission (DTX) mode of operation for individual ones of supplemental parallel data code channels.
Inventors
- 👤 Zhichun Honkasalo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 13:13
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/26; H04W52/267; H04L; H04L1/00; H04L1/0001; H04L1/0002; H04L1/0023; H04L1/0025; H04L2001/0092; H04L2001/0096; H04W52/30; H04W52/36; H04W52/38; H04W52/44
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A method for operating a mobile station, comprising the steps of: establishing a wireless data communication from a transmitter of the mobile station to a receiver of the base station at a predetermined data rate simultaneously through a fundamental data channel and at least one supplemental data channel; receiving a command from the base station to increase a transmission power of the mobile station transmitter; determining in the mobile station if the increased transmission power will exceed a transmission power threshold value; if so, reducing the data rate by disabling data transmission through at least one supplemental data channel; and increasing the transmission power.
Claim 2
Dependent Claim
81 words
A method as in claim 1, and further comprising steps of: receiving a command from the base station to decrease the transmission power of the mobile station; determining in the mobile station if the decreased transmission power, assuming that a disabled supplemental data channel were once more enabled, will be less than the transmission power threshold value; if so, increasing the data rate by enabling data transmission through at least one previously disabled supplemental data channel; and decreasing the transmission power.
Claim 3
Dependent Claim
46 words
A method as in claim 2, wherein the step of increasing the data rate includes a step of transmitting a message from the mobile station to the base station for indicating that transmission is being resumed through the at least one previously disabled supplemental data channel.
Claim 4
Independent Claim
59 words
A method according to any of the preceding claims, wherein the step of establishing includes steps of: requesting the base station for N data channels based at least in part on a desired mobile station data transmission rate; and receiving up to N distinct spreading codes from the base station for use in transmitting up to N data channels.
Claim 5
Independent Claim
289 words
A method for operating a code division, multiple access (CDMA) mobile station, comprising the steps of: requesting a base station for N data channels based at least in part on a desired mobile station data transmission rate; receiving up to N distinct spreading codes from the base station for use in transmitting up to N data channels; establishing a wireless data communication from a transmitter of the mobile station to a receiver of the base station at a predetermined data rate using the received distinct spreading codes, the wireless data communication being simultaneously conducted through a fundamental code channel and at least one supplemental code channel; receiving a first closed loop power control command from the base station, the first closed loop power control command requesting an increase in transmission power of the mobile station transmitter; determining in the mobile station if the increased transmission power will exceed a transmission power threshold value; if so, terminating data transmission through at least one supplemental code channel and increasing the transmission power; receiving a second closed loop power control command from the base station, the second closed loop power control command requesting a decrease in transmission power of the mobile station transmitter; determining in the mobile station if the decreased transmission power, assuming that data transmission through at least one previously terminated supplemental code channel is resumed, will be less than the transmission power threshold value; if so, resuming data transmission through at least one previously terminated supplemental code channel by first transmitting a message from the mobile station to the base station over the resumed supplemental code channel for indicating that transmission is being resumed through the at least one previously disabled supplemental data channel; and decreasing the transmission power.
Claim 6
Dependent Claim
47 words
A method as set forth in claim 5, wherein the first step of determining uses a first power threshold value, wherein the second step of determining uses a second power threshold value, and wherein the first power threshold value does not equal the second power threshold value.
Claim 7
Dependent Claim
103 words
A wireless data terminal, comprising: a data buffer; a transceiver comprising a RF transmitter and a RF receiver; and a controller coupled to said data buffer and to said transceiver, said controller being operative to establish a data connection from said data buffer to a receiver of a base station via said RF transmitter over multiple parallel data channels, said controller being responsive to required changes in transmitter power during the data connection for operating at least one of said multiple parallel data channels in a discontinuous transmission (DTX) mode so as to prevent said transmitter power from exceeding a transmitter power limit.
Claim 8
Dependent Claim
21 words
A mobile station as in claim 7, wherein said multiple parallel data channels are each operated with an associated spreading code.
Claim 9
Dependent Claim
41 words
A mobile station according to claim 7 or claim 8, wherein said controller is responsive to one of said data channels transitioning from a DTX-off state to a DTX-on state for transmitting a data channel resume message over the data channel.
Claim 10
Dependent Claim
39 words
A mobile station according to any of claims 7 to 9, wherein said controller is responsive to power control command bits that are periodically received from the base station for increasing or decreasing the transmitter power in predetermined increments.
Claim 11
Independent Claim
93 words
A method for operating a mobile station. comprising the steps of: establishing a wireless data communication from a transmitter of the mobile station to a receiver of the base station at a predetermined data rate through at least one data channel; receiving a command from the base station to increase a transmission power of the mobile station transmitter; determining in the mobile station if the increased transmission power will exceed a transmission power threshold value; if so, reducing the data rate through the at least one data channel; and increasing the transmission power.
Claim 12
Dependent Claim
82 words
A method as in claim 11, and further comprising steps of: receiving a command from the base station to decrease the transmission power of the mobile station; determining in the mobile station if the decreased transmission power, assuming that the data rate were increased through the at least one previously reduced data channel, will be less than the transmission power threshold value; if so, increasing the data rate through the at least one previously reduced data channel; and decreasing the transmission power.
Claim 13
Dependent Claim
68 words
A method according to claim 11 or claim 12, wherein the step of establishing includes steps of: requesting the base station for N data channels based at least in part on a desired mobile station data transmission rate; and receiving up to N distinct spreading codes from the base station for use in transmitting up to N data channels, wherein N is equal to or greater than one.
Claim 14
Independent Claim
56 words
A method of operating a mobile wireless communication device, the method comprising establishing a data channel between the mobile wireless communication device and a basestation; varying the data rate over the data channel in response to a request to vary the wireless communication device transmitter power level to prevent a transmitter power threshold value being exceeded.
References Cited (Backward Citations)
No citation records indexed.
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