# US 2010/0167779 A1 · Handling of mac-hs/ehs reset in enhanced serving cell change > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0167779 A1 - Document ID: US20100167779A1 - Status: Published application - Kind: A1 - Application number: 12/495,947 - Filed: 2009-07-01 - Published: 2010-07-01 - Earliest claimed: 2008-08-18 - Assignees: QUALCOMM Incorporated - Inventors: Rohit Kapoor; Sharad Deepak Sambhwani; Hailiang Cai; Srinivasa Eravelli; Yun Lin - Web page: https://patentgrep.com/patent/US20100167779A1 ## CPC - H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports} - H04W 52/40: during macro-diversity or soft handoff - H04L 1/1867: Arrangements specially adapted for the transmitter end - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Systems and methodologies are described that effectuate and/or facilitate MAC-hs/ehs resets in an enhanced serving cell. In accordance with various aspects set forth herein, systems and/or methods are provided that identify transmission power control bits included in active set update messages received from source or target base stations, ascertain whether or not transmission power control values included in the active set update messages differ from transmission power control values that the system currently operates under, and performs serving cell changes and where necessary media access control status resets based on an examination of a transmission power control combination index. ## Claims ### Claim 1 An apparatus operable in a wireless communication system, the apparatus comprising: a processor, configured to identify a transmission power control bit included in an active set update message, ascertain whether a transmission power control value included in the active set update message differs from the transmission power control value that the apparatus currently operates under, perform a serving cell change and based at least in part on an examination of a transmission power control combination index, perform a media access control status reset; and a memory coupled to the processor for persisting data. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the serving cell change includes automatically effectuating the media access control status reset. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the transmission power control bit indicates the transmission power control combination index. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the active set update message is dispatched from a base station to which the apparatus will transition. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the processor further configured to determine that the transmission power control value is similar to the transmission power control value under which the apparatus is currently operating under. ### Claim 6 (depends on 5) The apparatus of claim 5, based at least in part on the determination of a similarity of the transmission power control value under which the apparatus is currently operating, the processor further configured to perform the serving cell change without actuating a media access control status reset. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the active set update message dispatched to the apparatus based at least in part on a measurement report sent to a base station servicing a cell within which the apparatus is currently located. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the measurement report indicates that a signal strength associated with the cell is diminishing relative to a further cell. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the further cell is serviced by at least one of the base station or another base station. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein the base station directs the apparatus to add the further cell to an active set maintained by the apparatus. ### Claim 11 An apparatus operable in wireless communication systems, the apparatus comprising: a memory that retains instructions related to locating a transmission power control bit included in an active set update message, distinguishing between a transmission power control value included in the active set update message from the transmission power control value that the apparatus currently operates under, undertaking a serving cell change, and based at least in part on an investigation of a transmission power control combination index, performing a media access control status reset; and a processor, coupled to the memory, configured to execute the instructions retained in memory. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the transmission power control bit indicates the transmission power control combination index. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the transmission power control bit is received from a base station. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the base station sends the transmission power control bit in response to a measurement report obtained from the apparatus. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the measurement report indicates that a signal strength associated with a first cell serviced by a different base station is approaching a signal strength associated with a cell serviced by the base station. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the base station directs the apparatus to add the first cell to an active set maintained by the apparatus. ### Claim 17 A method utilized in wireless communication systems, the method comprising: identifying a transmission power control bit included in an active set update message; ascertaining whether a transmission power control value included in the active set update message differs from the transmission power control value that an apparatus currently operates under; and based at least in part on an analysis of a transmission power control combination index, performing a serving cell change that includes undertaking a media access control status reset. ### Claim 18 (depends on 17) The method of claim 17, wherein the transmission power control bit indicates the transmission power control index. ### Claim 19 (depends on 17) The method of claim 17, wherein the active set update message is received from a base station that services a first cell into which the apparatus is transitioning. ### Claim 20 (depends on 19) The method of claim 19, wherein a signal strength associated with the first cell is approaching the signal strength of a second cell controlled by the base station. ### Claim 21 (depends on 20) The method of claim 20, wherein the signal strength associated with the first cell and the signal strength of the second cell is included in a measurement report dispatched to the base station. ### Claim 22 (depends on 21) The method of claim 21, wherein based at least in part on the measurement report, the base station directs the apparatus to add the first cell to an active set maintained by the apparatus. ### Claim 23 An apparatus operable in wireless communication systems, the apparatus comprising: means for identifying a transmission power control bit included in an active set update message; means for ascertaining whether a transmission power control value included in the active set update message differs from the transmission power control value that a means for receiving is currently subject to; and means for performing a media access control status reset based at least in part on an examination of a transmission power control combination index. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the means for performing further effectuates a serving cell change. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the means for identifying receives the active set update message from a means for transmitting that will subsequently service the means for receiving. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the means for ascertaining further determines whether the transmission power control value is similar to the transmission power control value that the means for receiving is currently subject to. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein the transmission power control bit indicates the transmission power control combination index. ### Claim 28 A computer program product, comprising: a computer-readable medium, comprising: code for identifying a transmission power control bit included in an active set update message; code for ascertaining whether a transmission power control value included in the active set update message differs from the transmission power control value that an apparatus currently operates under; and code for performing a serving cell change that includes code for undertaking a media access control status reset wherein the media access control status reset is based at least in part on an examination of a transmission power control combination index. ### Claim 29 (depends on 28) The computer program product of claim 28, wherein the transmission power control bit is received from a base station in response to a measurement report dispatched from the apparatus. ### Claim 30 (depends on 29) The computer program product of claim 29, wherein measurement report indicates that a relative signal strength between a first cell serviced by the base station and a second cell serviced by a disparate base station. ### Claim 31 (depends on 30) The computer program product of claim 30, wherein the base station indicates to the apparatus that the second cell is to be added to an active set persisted or maintained by the apparatus. ### Claim 32 (depends on 28) The computer program product of claim 28, wherein the transmission power control bit indicates the transmission power control combination index.