# US 2021/0242996 A1 · Transmission of sounding reference signal and scheduling request in single carrier systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242996 A1 - Document ID: US20210242996A1 - Status: Published application - Kind: A1 - Application number: 17/234,651 - Filed: 2021-04-19 - Published: 2021-08-05 - Earliest claimed: 2007-10-30 - Assignees: Texas Instruments Incorporated - Applicants: Texas Instruments Incorporated - Inventors: Pierre Bertrand; Zukang Shen; Jing Jiang - Web page: https://patentgrep.com/patent/US20210242996A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 5/0058: {Allocation criteria} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A transmission of information from a secondary to a primary node occurs in a plurality of transmission instances which are logical time durations. A secondary node receives an allocation of periodic transmission instances for a scheduling request indicator (SRI) and an allocation if periodic transmission instances for a sounding reference signal (SRS). In a particular transmission instance allocated for the transmission of both SRS and SRI, the secondary node transmits the SRI without transmitting the SRS if the SRI indicates a pending scheduling request; otherwise, the secondary node transmits the SRS without transmitting the SRI. ## Claims ### Claim 1 A method for transmission in a wireless network, comprising: receiving an allocation comprising a plurality of periodic transmission instances for a scheduling request indicator (SRI); receiving an allocation comprising a plurality of periodic transmission instances for a sounding reference signal (SRS); transmitting an SRI without transmitting an SRS in a transmission instance allocated for both SRI and SRS when the SRI indicates a pending scheduling request; and transmitting an SRS without transmitting an SRI in a transmission instance allocated for both SRI and SRS when the SRI indicates no pending scheduling request. ### Claim 2 (depends on 1) The method of claim 1, further comprising receiving a control message indicating a mode of operation in a transmission instance allocated for both SRI and SRS with a pending scheduling request in the transmission instance, wherein in a first mode of operation, the SRI is transmitted without transmitting the SRS in the transmission instance; wherein in a second mode of operation, both the SRI and the SRS are transmitted in the transmission instance. ### Claim 3 (depends on 2) The method of claim 2, wherein the control message indicating a mode of operation is sent to all user equipments within a cell of the wireless network, and wherein the mode of operation is common to all user equipments within a cell of the wireless network. ### Claim 4 (depends on 2) The method of claim 2, wherein a transmission instance comprises a plurality of single carrier orthogonal frequency division multiple access (SC-OFDMA) symbols. ### Claim 5 (depends on 4) The method of claim 4, wherein in the second mode of operation, at least one SC-OFDMA symbol is used for the transmission of SRS and at least another SC-OFDMA symbol is used for the transmission of SRI. ### Claim 6 (depends on 4) The method of claim 4, wherein the control message further indicates a mode of operation in a transmission instance allocated for both ACK/NAK and SRS, and wherein in a third mode of operation, the ACK/NAK is transmitted without transmitting the SRS in the transmission instance; wherein in a fourth mode of operation, both the ACK/NAK and the SRS are transmitted in the transmission instance. ### Claim 7 (depends on 6) The method of claim 6, wherein in the fourth mode of operation, at least one SC-OFDMA symbol is used for the transmission of SRS and at least another SC-OFDMA symbol is used for the transmission of ACK/NAK. ### Claim 8 (depends on 6) The method of claim 6, wherein the control message is binary, indicating either the first and third mode of operations, or the second and fourth mode of operations. ### Claim 9 A method for transmission in a wireless network, comprising: transmitting to user equipment (UE) an allocation comprising a plurality of periodic transmission instances for a scheduling request indicator (SRI); transmitting to the UE an allocation comprising a plurality of periodic transmission instances for a sounding reference signal (SRS); receiving from the UE an SRI without receiving an SRS in a transmission instance allocated for both SRI and SRS, when the SRI indicates a pending scheduling request; and receiving from the UE an SRS without receiving an SRI in a transmission instance allocated for both SRI and SRS, when the SRI indicates no pending scheduling request. ### Claim 10 (depends on 9) The method of claim 9, further comprising transmitting to the UE a control message indicating a mode of operation in a transmission instance allocated for both SRI and SRS with a pending scheduling request in the transmission instance, wherein in a first mode of operation, the SRI is received without receiving the SRS in the transmission instance; wherein in a second mode of operation, both the SRI and the SRS are received in the transmission instance. ### Claim 11 (depends on 10) The method of claim 10, wherein the control message indicating a mode of operation is sent to all user equipments within a cell of the wireless network, and wherein the mode of operation is common to all user equipments within a cell of the wireless network. ### Claim 12 (depends on 11) The method of claim 11, wherein a transmission instance comprises a plurality of single carrier orthogonal frequency division multiple access (SC-OFDMA) symbols. ### Claim 13 (depends on 11) The method of claim 11, wherein in the second mode of operation, the transmission of SRI comprises at least one SC-OFDMA symbol and the transmission of SRI comprises at least another SC-OFDMA symbol. ### Claim 14 (depends on 12) The method of claim 12, wherein the control message further indicates a mode of operation in a transmission instance allocated for both ACK/NAK and SRS, wherein in a third mode of operation, the ACK/NAK is received from the UE without receiving the SRS in the transmission instance; wherein in a fourth mode of operation, both the ACK/NAK and the SRS are received from the UE in the transmission instance. ### Claim 15 (depends on 14) The method of claim 14, wherein in the fourth mode of operation, the transmission of SRS comprises at least one SC-OFDMA symbol and the transmission of ACK/NAK comprises at least another SC-OFDMA symbol. ### Claim 16 (depends on 14) The method of claim 14, wherein the control message is binary, indicating either the first and third mode of operations, or the second and fourth mode of operations. ### Claim 17 Apparatus for use in a wireless network, comprising: a processor coupled to a memory, the memory storing instructions for execution by the processor, the processor controllably coupled to receiver logic and to transmitter logic; buffer logic controlled by the processor operable to store a pending scheduling request; the receiver logic operable to receive and store in the memory an allocation comprising a plurality of periodic transmission instances for a scheduling request indicator (SRI) and an allocation comprising a plurality of periodic transmission instances for a sounding reference signal (SRS); and the transmitter logic being responsive to the buffer logic and operable to produce and transmit an SRI without transmitting an SRS in a transmission instance allocated for both SRI and SRS when the buffer logic indicates the pending scheduling request; and further operable to transmit an SRS without transmitting an SRI in a transmission instance allocated for both SRI and SRS when the buffer logic indicates no pending scheduling request. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the receiver logic is further operable to receive and store in the memory a control message indicating a mode of operation in a transmission instance allocated for both SRI and SRS with a pending scheduling request in the transmission instance; and wherein in a first mode of operation, the transmitter logic is operable to transmit the SRI without transmitting the SRS in the transmission instance; wherein in a second mode of operation, the transmitter is operable to transmit both the SRI and the SRS in the transmission instance. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the control message further indicates a mode of operation in a transmission instance allocated for both ACK/NAK and SRS; and wherein in a third mode of operation, the transmitter logic is further operable to produce and transmit an ACK/NAK without transmitting the SRS in the transmission instance; wherein in a fourth mode of operation, both the ACK/NAK and the SRS are transmitted in the transmission instance. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the control message is binary, indicating either the first and third mode of operations, or the second and fourth mode of operations.