# US 8,572,451 B2 · Method and apparatus for indicating a temporary block flow to which a piggybacked ACK/NACK field is addressed > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,572,451 B2 - Document ID: US8572451B2 - Status: Granted - Kind: B2 - Application number: 12/133,593 - Filed: 2008-06-05 - Published: 2008-12-11 - Granted: 2013-10-29 - Earliest claimed: 2007-06-06 - Assignees: InterDigital Technology Corporation - Applicants: Behrouz Aghili; Stephen G. Dick; Marian Rudolf; Prabhakar R. Chitrapu - Inventors: Behrouz Aghili; Stephen G. Dick; Marian Rudolf; Prabhakar R. Chitrapu - Web page: https://patentgrep.com/patent/US8572451B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1867: Arrangements specially adapted for the transmitter end - H04L 1/1896: {ARQ related signaling} - H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)} - H04L 1/0061: {Error detection codes} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and apparatus for indicating a temporary block flow (TBF) to which a piggybacked acknowledgement/non-acknowledgement (PAN) field is addressed are disclosed. A sequence may be generated from a temporary flow identity (TFI) to which the PAN field is addressed and masked with a PAN check sequence (PCS). A radio block including a PAN field and a masked PCS is transmitted. The PCS may be masked with one of TFIs which is selected in accordance with a rule pre-agreed. A secondary identifier may indicate a TBF to which the PAN field is addressed. A special value may be used to represent all TBFs assigned and a secondary identifier may indicate a TBF to which the PAN field is addressed. A special value on the PAN field may be used for control purposes for indicating an action affecting a group of receiving stations listening to the radio block. ## Claims ### Claim 1 A method for use in a wireless transmit/receive unit (WTRU), the method comprising: the WTRU generating a piggybacked acknowledgement/non-acknowledgement (PAN) field; the WTRU generating a PAN check sequence (PCS) from the PAN field; the WTRU masking the PCS with a temporary flow identity (TFI) value that consists of five bits, wherein, based on a pre-determined condition, the TFI value is not associated with an address and each of the five bits has a value of zero; and the WTRU transmitting data that includes the PAN field and the masked PCS. ### Claim 2 (depends on 1) The method of claim 1, wherein the masking the PCS further comprises adding the TFI value modulo-2 to a last five bits of the PCS. ### Claim 3 (depends on 1) The method of claim 1, wherein the pre-determined condition is the WTRU being assigned one temporary block flow (TBF) in the uplink direction. ### Claim 4 (depends on 1) The method of claim 1, wherein the pre-determined condition is an action affecting the WTRU. ### Claim 5 (depends on 1) The method of claim 1, wherein the pre-determined condition is the PAN field needing to be decoded by more than one WTRU. ### Claim 6 A method for use in a base station, the method comprising: the base station receiving data that includes a piggybacked acknowledgement/non-acknowledgment (PAN) field and a masked PAN check sequence (PCS), the masked PCS being masked by a PCS generated from the PAN field with a temporary flow identity (TFI) value that consists of five bits, wherein, based on a pre-determined condition, the TFI value is not associated with an address and each of the five bits has a value of zero; and the base station decoding the masked PCS using the TFI value. ### Claim 7 (depends on 6) The method of claim 6, wherein the pre-determined condition is a particular receiving station being assigned one temporary block flow (TBF) in the uplink direction. ### Claim 8 (depends on 6) The method of claim 6, wherein the pre-determined condition is an action affecting a particular receiving station. ### Claim 9 (depends on 6) The method of claim 6, wherein the pre-determined condition is the PAN field needing to be decoded by more than one receiving station. ### Claim 10 A wireless transmit/receive unit (WTRU) comprising: a processor configured to: generate a piggybacked acknowledgement/non-acknowledgement (PAN) field; generate a PAN check sequence (PCS) from the PAN field; and mask the PCS with a temporary flow identity (TFI) value that consists of five bits, wherein, based on a pre-determined condition, the TFI value is not associated with an address and each of the five bits has a value of zero; and a transmitter configured to transmit data that includes the PAN field and the masked PCS. ### Claim 11 (depends on 10) The WTRU of claim 10, wherein the processor is further configured to mask the PCS by adding the TFI value modulo-2 to a last five bits of the PCS. ### Claim 12 (depends on 10) The WTRU of claim 10, wherein the pre-determined condition is the WTRU being assigned one temporary block flow (TBF) in the uplink direction. ### Claim 13 (depends on 10) The WTRU of claim 10, wherein the pre-determined condition is an action affecting the WTRU. ### Claim 14 (depends on 10) The WTRU of claim 10, wherein the pre-determined condition is the PAN field needing to be decoded by more than one WTRU. ### Claim 15 A base station comprising: a receiver configured to receive data that includes a piggybacked acknowledgement/non-acknowledgment (PAN) field and a masked PAN check sequence (PCS), the masked PCS being masked by a PCS generated from the PAN field with a temporary flow identity (TFI) value that consists of five bits, wherein, based on a pre-determined condition, the TFI value is not associated with an address and each of the five bits has a value of zero; and a processor configured to decode the masked PCS using the TFI value. ### Claim 16 (depends on 15) The base station of claim 15, wherein the pre-determined condition is a particular receiving station being assigned one temporary block flow (TBF) in the uplink direction. ### Claim 17 (depends on 15) The base station of claim 15, wherein the pre-determined condition is an action affecting a particular receiving station. ### Claim 18 (depends on 15) The base station of claim 15, wherein the pre-determined condition is the PAN field needing to be decoded by more than one receiving station.