# US 11,452,136 B2 · System and method for network access > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,136 B2 - Document ID: US11452136B2 - Status: Granted - Kind: B2 - Application number: 15/648,340 - Filed: 2017-07-12 - Published: 2018-02-15 - Granted: 2022-09-20 - Earliest claimed: 2016-08-12 - Assignees: Futurewei Technologies, Inc. - Applicants: Futurewei Technologies, Inc. - Inventors: Jialing Liu; Qian Cheng; Weimin Xiao - Web page: https://patentgrep.com/patent/US11452136B2 ## CPC - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04J 11/0069: {Cell search, i.e. determining cell identity [cell-ID] (design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655)} - H04J 11/0076: {Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 48/10: using broadcasted information - H04W 48/16: Discovering, processing access restriction or access information - H04W 48/18: Selecting a network or a communication service - H04W 48/20: Selecting an access point - H04W 52/242: {taking into account path loss} - H04W 52/246: {where the output power of a terminal is based on a path parameter calculated in said terminal} - H04W 52/40: during macro-diversity or soft handoff - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 56/0015: {one node acting as a reference for the others} - H04W 74/002: {Transmission of channel access control information} - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0866: {using a dedicated channel for access} - H04W 76/11: Allocation or use of connection identifiers - H04W 76/27: Transitions between radio resource control [RRC] states - H04J 2011/0096: {Network synchronisation} - H04J 2211/005: Long term evolution [LTE] - H04W 84/02: Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop] - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W 92/02: Inter-networking arrangements - H04W 92/10: between terminal device and access point, i.e. wireless air interface - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract A that includes receiving, by a user equipment (UE) from a first base station, on a first carrier, a synchronization sequence (SS) and performing a radio resource management (RRM) measurement in accordance with the SS. The method also includes performing cell selection and mobility support in accordance with the RRM measurement, when the UE is in idle mode and generating an RRM measurement report in accordance with the RRM measurement and transmitting, by the UE to the first base station on the first carrier, the RRM measurement report, when the UE is in connected mode. ## Claims ### Claim 1 A method comprising: receiving, by a user equipment (UE), a primary synchronization sequence (PSS) signal, a secondary synchronization sequence (SSS) signal, and a physical broadcast channel (PBCH) from a base station, the PSS signal and the SSS signal providing a timing reference to be used for a cell-search by the UE to achieve coarse synchronization with the base station; estimating, by the UE, a path loss between the UE and the base station based on a radio resource management (RRM) measurement of at least the SSS signal, the RRM measurement of the SSS signal being a synchronization signal reference signal received power (SS-RSRP) measurement type defined by a fifth generation (5G) new radio (NR) telecommunication standard; and transmitting, by the UE, a random access channel (RACH) message in accordance with the estimated path loss. ### Claim 2 (depends on 1) The method of claim 1, further comprising: obtaining, by the UE, a cell identity of a cell of the base station from the PSS signal and SSS signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the PSS signal and the SSS signal are received over a first carrier, and wherein the RACH message is transmitted over a second carrier in accordance with a RACH configuration obtained from the first carrier, the second carrier being different than the first carrier. ### Claim 4 (depends on 3) The method of claim 3, further comprising: receiving, by the UE, a UE identifier (UEID) for the UE over the second carrier; transmitting, by the UE, a physical uplink shared channel (PUSCH) and a demodulation reference signal (DMRS) based on the UEID over the second carrier; receiving, by the UE, radio resource control (RRC) configuration information over a physical downlink scheduling channel (PDSCH) based on the UEID; and connecting, by the UE, to the second carrier in accordance with the RRC configuration information. ### Claim 5 (depends on 1) The method of claim 1, wherein a transmit power level of the RACH message is based on the estimated path loss. ### Claim 6 (depends on 1) The method of claim 1, further comprising: performing, by the UE while operating in an idle mode, cell selection and mobility support in accordance with the RRM measurement of the SSS signal. ### Claim 7 (depends on 1) The method of claim 1, further comprising: transmitting, by the UE while operating in a connected mode, an RRM measurement report to the base station in accordance with the RRM measurement of the SSS signal, the RRM measurement report and the SSS signal being communicated over the same carrier. ### Claim 8 (depends on 1) The method of claim 1, wherein the RRM measurement is based on both the SSS signal and the PSS signal. ### Claim 9 (depends on 1) The method of claim 1, wherein the RRM measurement is based on both the SSS signal and the PBCH. ### Claim 10 A user equipment (UE) comprising: a non-transitory memory storage comprising instructions; and one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to: receive a primary synchronization sequence (PSS) signal, a secondary synchronization sequence (SSS) signal, and a physical broadcast channel (PBCH) from a base station, the PSS signal and the SSS signal providing a timing reference to be used for a cell-search by the UE to achieve coarse synchronization with the base station; estimate a path loss between the UE and the base station based on a radio resource management (RRM) measurement of at least the SSS signal, the RRM measurement of the SSS signal being a synchronization signal reference signal received power (SS-RSRP) measurement type defined by a fifth generation (5G) new radio (NR) telecommunication standard; and transmit a random access channel (RACH) message in accordance with the estimated path loss. ### Claim 11 (depends on 10) The UE of claim 10, wherein the one or more processors further execute the instructions to: obtain coarse time/frequency synchronization information from the PSS signal and the SSS signal; and receive a physical broadcast channel (PBCH) in accordance with the coarse time/frequency synchronization information. ### Claim 12 (depends on 10) The UE of claim 10, wherein the one or more processors further execute the instructions to: obtain a cell identity of a cell of the base station from the PSS signal and SSS signal. ### Claim 13 (depends on 10) The UE of claim 10, wherein the PSS signal and the SSS signal are received over a first carrier, and wherein the RACH message is transmitted over a second carrier in accordance with a RACH configuration obtained from the first carrier, the second carrier being different than the first carrier. ### Claim 14 (depends on 13) The UE of claim 13, wherein the one or more processors further execute the instructions to: receive a UE identifier (UEID) for the UE over the second carrier; transmit a physical uplink shared channel (PUSCH) and a demodulation reference signal (DMRS) based on the UEID over the second carrier; receive radio resource control (RRC) configuration information over a physical downlink scheduling channel (PDSCH) based on the UEID; and connect to the second carrier in accordance with the RRC configuration information. ### Claim 15 (depends on 10) The UE of claim 10, wherein a transmit power level of the RACH message is based on the estimated path loss. ### Claim 16 (depends on 10) The UE of claim 10, wherein the one or more processors further execute the instructions to: perform, while the UE is operating in an idle mode, cell selection and mobility support in accordance with the RRM measurement of the SSS signal. ### Claim 17 (depends on 10) The UE of claim 10, wherein the one or more processors further execute the instructions to: transmit, while the UE is operating in a connected mode, an RRM measurement report to the base station in accordance with the RRM measurement of the SSS signal, the RRM measurement report and the SSS signal being communicated over the same carrier. ### Claim 18 (depends on 10) The UE of claim 10, wherein the RRM measurement is based on both the SSS signal and the PSS signal. ### Claim 19 (depends on 10) The UE of claim 10, wherein the RRM measurement is based on both the SSS signal and the PBCH.