# US 7,613,476 B2 · Method and apparatus for path imbalance reduction in networks using high speed data packet access (HSDPA) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,613,476 B2 - Document ID: US7613476B2 - Status: Granted - Kind: B2 - Application number: 11/446,084 - Filed: 2006-06-02 - Published: 2007-12-06 - Granted: 2009-11-03 - Earliest claimed: 2006-06-02 - Assignees: Alcatel-Lucent USA Inc. - Inventors: Patrick Charriere; Seau-Sian Lim; Jens Mueckenheim; Philip Sapiano - Web page: https://patentgrep.com/patent/US7613476B2 ## CPC - H04W 52/286: {during data packet transmission, e.g. high speed packet access [HSPA]} - H04B 17/0085: {using test signal generators} - H04W 52/146: {Uplink power control} - H04W 52/243: {taking into account interferences} - H04W 52/40: during macro-diversity or soft handoff - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A method and apparatus are disclosed whereby noise is introduced at one or more base stations in non-HSDPA cells into the uplink signal from one or more user devices. As a result, the apparent quality of the uplink channel in those cells will appear to be lower than the actual quality of that channel. The power control commands issued from the base station to the user device will, therefore, reflect this lower estimated channel quality and, as a result, the user device will follow power control commands from the base station in the HSDPA cell. Therefore, the transmit power of the user device will remain adequate to communicate with the base station in the HSDPA cell and, as a result, the UL and DL in the HSDPA cell will remain synchronized. ## Claims ### Claim 1 A method for use in a wireless cellular network comprising: receiving at a base station in a cell in said network a first uplink signal from a user device via an uplink channel; generating a noise signal as a function of a desired power of a downlink channel in said cell; and applying said noise signal to said first uplink signal to create a second uplink signal. ### Claim 2 (depends on 1) The method of claim 1 further comprising: decoding said first uplink signal to create a decoded first uplink signal; and transmitting said decoded first uplink signal to a radio network controller associated with said base station. ### Claim 3 (depends on 2) The method of claim 2 further comprising: generating at least one parameter representing a quality of a channel in said cell. ### Claim 4 (depends on 3) The method of claim 3 wherein said step of generating at least one parameter comprises: generating a first value of a parameter as a function of said first uplink signal; and generating a second value of said parameter as a function of said second uplink signal. ### Claim 5 (depends on 4) The method of claim 4 further comprising: transmitting said first value of said parameter and said second value of said parameter to a radio network controller. ### Claim 6 (depends on 3) The method of claim 3 wherein said at least one parameter comprises a value representing cyclic redundancy check information associated with a transport block. ### Claim 7 (depends on 3) The method of claim 3 wherein said at least one parameter comprises a quality estimate of a channel in said cell. ### Claim 8 (depends on 3) The method of claim 3 wherein said channel comprises said downlink channel. ### Claim 9 (depends on 3) The method of claim 3 further comprising: receiving from said radio network controller an indication of a desired change to a power level of said first uplink channel, said indication a function of said at least one parameter. ### Claim 10 (depends on 9) The method of claim 9 further comprising: transmitting to said user device a command to adjust a transmit power of said user device, said transmit power a function of said indication. ### Claim 11 An apparatus for use in a wireless cellular network comprising: means for receiving at a base station in a cell in said network a first uplink signal from a user device via an uplink channel; means for generating a noise signal as a function of a desired power of a downlink channel in said cell; and means for applying said noise signal to said first uplink signal to create a second uplink signal. ### Claim 12 (depends on 11) The apparatus of claim 11 further comprising: means for decoding said first uplink signal to create a decoded first uplink signal; and means for transmitting said decoded first uplink signal to a radio network controller associated with said base station. ### Claim 13 (depends on 12) The apparatus of claim 12 further comprising: means for generating at least one parameter representing a quality of a channel in said cell. ### Claim 14 (depends on 13) The apparatus of claim 13 wherein said step of generating at least one parameter comprises: means for generating a first value of a parameter as a function of said first uplink signal; and means for generating a second value of said parameter as a function of said second uplink signal. ### Claim 15 (depends on 14) The apparatus of claim 14 further comprising: means for transmitting said first value of said parameter and said second value of said parameter to a radio network controller. ### Claim 16 (depends on 13) The apparatus of claim 13 wherein said at least one parameter comprises a value representing cyclic redundancy check information associated with a transport block. ### Claim 17 (depends on 13) The apparatus of claim 13 wherein said at least one parameter comprises a quality estimate of a channel in said cell. ### Claim 18 (depends on 13) The apparatus of claim 13 wherein said channel comprises said downlink channel. ### Claim 19 (depends on 13) The apparatus of claim 13 further comprising: means for receiving from said radio network controller an indication of a desired change to a power level of said first uplink channel, said indication a function of said at least one parameter. ### Claim 20 (depends on 19) The apparatus of claim 19 further comprising: means for transmitting to said user device a command to adjust a transmit power of said user device, said transmit power a function of said indication. ### Claim 21 A computer readable medium comprising computer program instructions which, when executed by a processor, define the steps for providing service in a wireless cellular network, said steps comprising: receiving at a base station in a cell in said network a first uplink signal from a user device via an uplink channel; generating a noise signal as a function of a desired power of a downlink channel in said cell; and applying said noise signal to said first uplink signal to create a second uplink signal. ### Claim 22 (depends on 21) The computer readable medium of claim 21 further comprising computer program instructions which, when executed by a processor, define the steps of: decoding said first uplink signal to create a decoded first uplink signal; and transmitting said decoded first uplink signal to a radio network controller associated with said base station. ### Claim 23 (depends on 22) The computer readable medium of claim 22 further comprising computer program instructions which, when executed by a processor, define the step of: generating at least one parameter representing a quality of a channel in said cell. ### Claim 24 (depends on 23) The computer readable medium of claim 23 wherein said step of generating at least one parameter comprises: generating a first value of a parameter as a function of said first uplink signal; and generating a second value of said parameter as a function of said second uplink signal. ### Claim 25 (depends on 24) The computer readable medium of claim 24 further comprising computer program instructions which, when executed by a processor, define the step of: transmitting said first value of said parameter and said second value of said parameter to a radio network controller. ### Claim 26 (depends on 23) The computer readable medium of claim 23 wherein said at least one parameter comprises a value representing cyclic redundancy check information associated with a transport block. ### Claim 27 (depends on 23) The computer readable medium of claim 23 wherein said at least one parameter comprises a quality estimate of a channel in said cell. ### Claim 28 (depends on 23) The computer readable medium of claim 23 wherein said channel comprises said downlink channel. ### Claim 29 (depends on 23) The computer readable medium of claim 23 further comprising computer program instructions which, when executed by a processor, define the step of: receiving from said radio network controller an indication of a desired change to a power level of said first uplink channel, said indication a function of said at least one parameter. ### Claim 30 (depends on 29) The computer readable medium of claim 29 further comprising computer program instructions which, when executed by a processor, define the step of: transmitting to said user device a command to adjust a transmit power of said user device, said transmit power a function of said indication.