# US 8,542,596 B2 · Method and apparatus for setting a happy bit on an E-DCH dedicated physical control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,542,596 B2 - Document ID: US8542596B2 - Status: Granted - Kind: B2 - Application number: 13/468,132 - Filed: 2012-05-10 - Published: 2012-11-08 - Granted: 2013-09-24 - Earliest claimed: 0208-06-20 - Assignees: InterDigital Patent Holdings, Inc. - Applicants: Stephen E. Terry; Paul Marinier; Diana Pani - Inventors: Stephen E. Terry; Paul Marinier; Diana Pani - Web page: https://patentgrep.com/patent/US8542596B2 ## CPC - H04W 28/0205: {at the air interface (dynamic wireless traffic scheduling H04W72/12)} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 47/25: with rate being modified by the source upon detecting a change of network conditions - H04W 8/04: Registration at HLR or HSS [Home Subscriber Server] - H04W 28/0284: {detecting congestion or overload during communication (monitoring arrangements H04L43/00)} - H04W 28/12: using signalling between network elements - H04W 72/0473: {the resource being transmission power} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1874: {Buffer management} - H04W 72/1268: of uplink data flows - 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 A wireless transmit/receive unit (WTRU) determines (1) whether the WTRU is transmitting as much scheduled data as allowed by a current Serving_Grant, (2) whether the WTRU has enough power to transmit at higher data rate, and (3) based on a same power offset as a currently selected E-DCH transport format combination (E-TFC), whether total E-DCH buffer status (TEBS) would require more than predetermined period to be transmitted with the current Serving_Grant.times.a ratio of active processes to a total number of processes. If criteria (1)-(3) are met, the WTRU sets the happy bit to “unhappy.” If MAC-i/is is configured, the WTRU evaluates criteria (2) by identifying an E-TFC that has a transport block size at least x bits larger than a transport block size of the currently selected E-TFC, and determining whether the identified E-TFC is supported based on a same power offset as the currently selected E-TFC. ## Claims ### Claim 1 A method for setting a happy bit on an enhanced dedicated channel (E-DCH) dedicated physical control channel (E-DPCCH) in a wireless transmit/receive unit (WTRU), the method comprising: determining whether predetermined criteria are met and setting the happy bit to “unhappy” on a condition that the criteria are met, wherein when E-DCH improved medium access control (MAC-i/is) is configured and medium access control (MAC) segmentation is supported the criteria includes determining whether the WTRU has enough power available to transmit at a higher data rate and determining whether the WTRU has enough power available to transmit at the higher data rate comprises: identifying an E-DCH transport format combination (E-TFC) that has a transport block size at least x number of bits larger than a transport block size of a currently selected E-TFC selected for transmission in a same transmission time interval (TTI) as the happy bit; and determining whether the identified E-TFC is supported based on a same power offset as the currently selected E-TFC. ### Claim 2 (depends on 1) The method of claim 1, wherein the value x is configured by a higher layer. ### Claim 3 (depends on 1) The method of claim 1, wherein the value x corresponds to one of a minimum MAC segment size, a percentage increase in a size of a current radio link control (RLC) protocol data unit (PDU) size, a minimum allowed transport block size, or a minimum value of a minimum E-TFC set. ### Claim 4 (depends on 1) The method of claim 1, wherein the value x is a minimum value between a percentage of a size of the currently selected E-TFC and a fixed threshold. ### Claim 5 (depends on 1) The method of claim 1, wherein the value x is a minimum value between a difference in size in bits between an E-TFC that is n indices above the currently selected E-TFC in an E-DCH transport block size table and the currently selected E-TFC, and a fixed threshold. ### Claim 6 (depends on 1) The method of claim 1, wherein x is a predetermined value that corresponds to a segmented radio link control (RLC) protocol data unit (PDU) size. ### Claim 7 (depends on 1) The method of claim 1, wherein x is a predetermined value and is unrelated to a smallest radio link control (RLC) protocol data unit (PDU) size. ### Claim 8 A wireless transmit/receive unit (WTRU) configured to set a happy bit on an enhanced dedicated channel (E-DCH) dedicated physical control channel (E-DPCCH), the WTRU comprising: a transceiver configured to transmit the happy bit on the E-DPCCH; and a controller configured to determine whether predetermined criteria are met and set the happy bit to “unhappy” on a condition that the criteria are met, wherein when E-DCH improved medium access control (MAC-i/is) is configured and medium access control (MAC) segmentation is supported the criteria includes whether the WTRU has enough power available to transmit at a higher data rate and determining whether the WTRU has enough power available to transmit at the higher data rate comprises the controller being configured to: identify an E-DCH transport format combination (E-TFC) that has a transport block size at least x number of bits larger than a transport block size of a currently selected E-TFC selected for transmission in a same transmission time interval (TTI) as the happy bit; and determine whether the identified E-TFC is supported based on a same power offset as the currently selected E-TFC. ### Claim 9 (depends on 8) The WTRU of claim 8, wherein the value x is configured by a higher layer. ### Claim 10 (depends on 8) The WTRU of claim 8, wherein the value x corresponds to one of a minimum MAC segment size, a minimum radio link control (RLC) protocol data unit (PDU) size, a percentage increase in a size of a current RLC PDU size, a minimum allowed transport block size, or a minimum value of a minimum E-TFC set. ### Claim 11 (depends on 8) The WTRU of claim 8, wherein the value x is a minimum value between a percentage of a size of the currently selected E-TFC and a fixed threshold. ### Claim 12 (depends on 8) The WTRU of claim 8, wherein the value x is a minimum value between a difference in size in bits between an E-TFC that is n indices above the currently selected E-TFC in an E-DCH transport block size table and the currently selected E-TFC, and a fixed threshold. ### Claim 13 (depends on 8) The WTRU of claim 8, wherein x is a predetermined value that corresponds to a segmented radio link control (RLC) protocol data unit (PDU) size. ### Claim 14 (depends on 8) The WTRU of claim 8, wherein x is a predetermined value and is unrelated to a smallest radio link control (RLC) protocol data unit (PDU) size.