# US 11,452,067 B2 · Secure paging for service prioritization > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,067 B2 - Document ID: US11452067B2 - Status: Granted - Kind: B2 - Application number: 17/014,911 - Filed: 2020-09-08 - Published: 2021-03-25 - Granted: 2022-09-20 - Earliest claimed: 2019-09-25 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Ozcan Ozturk; Soo Bum Lee; Gavin Bernard Horn - Web page: https://patentgrep.com/patent/US11452067B2 ## CPC - H04L 9/14: using a plurality of keys or algorithms - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04L 9/0894: {Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage} - H04L 9/3242: {involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC} - H04W 12/037: of the control plane, e.g. signalling traffic - H04W 12/06: Authentication - H04W 12/106: Packet or message integrity - H04W 76/11: Allocation or use of connection identifiers - H04W 76/25: Maintenance of established connections - H04L 2209/80: Wireless - 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 This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for encrypting paging information transmitted to a user equipment (UE) in a paging message. In one aspect, a base station (BS) encrypts paging information and transmits a paging message to one of a UE or another BS for transmission to the UE. The paging message includes the encrypted paging information. A UE receives the paging message from a BS including the encrypted paging information. The UE decrypts the encrypted paging information to identify paging information, and determines whether to communicate with the BS based on the paging information. The paging information may be encrypted and the encrypted paging information decrypted based on information configured or obtained during at least one of a registration procedure or a radio access network (RAN)-based Notification Area Update (RNAU). Confidentiality of paging information in paging messages may thereby be improved. ## Claims ### Claim 1 A method for wireless communication at an apparatus of a user equipment (UE), comprising: receiving, from a base station (BS), during at least one of a registration procedure or a radio access network (RAN)-based Notification Area Update (RNAU), information indicating a mapping between different paging information and indices associated with the different paging information; receiving, from the BS, a paging message comprising encrypted paging information; decrypting the encrypted paging information to identify an index included in the encrypted paging information; determining paging information corresponding to the index based on the mapping; and determining whether to communicate with the BS based on the paging information. ### Claim 2 (depends on 1) The method of claim 1, wherein the receiving the information comprises receiving the mapping during the registration procedure. ### Claim 3 (depends on 2) The method of claim 2, wherein the information further indicates an updated mapping between the different paging information and the indices associated with the different paging information, and wherein the receiving the information comprises receiving the updated mapping during the registration procedure, during the RNAU, or based on an identifier of the UE. ### Claim 4 (depends on 1) The method of claim 1, wherein the mapping includes a fixed mapping, and the index is scrambled based on a shared key between the UE and the BS, wherein the shared key includes one of a non-access stratum (NAS) ciphering key or an access stratum (AS) ciphering key. ### Claim 5 (depends on 1) The method of claim 1, wherein the encrypted paging information includes a temporary mobile subscriber identifier (TMSI) associated with the UE, wherein the information includes an association of different TMSI with the different paging information, and wherein the decrypting comprises decrypting the encrypted paging information based on the association. ### Claim 6 (depends on 5) The method of claim 5, wherein the information further includes an offset, and wherein the decrypting comprises modifying the TMSI based on the offset to identify the paging information. ### Claim 7 (depends on 1) The method of claim 1, further comprising determining a paging occasion for receiving the paging message based on a primary temporary mobile subscriber identifier (TMSI) of the UE. ### Claim 8 (depends on 1) The method of claim 1, wherein the encrypted paging information includes a radio network temporary identifier (RNTI) associated with the UE, wherein the information includes an association of different RNTI with the different paging information, and wherein the decrypting comprises decrypting the encrypted paging information based on the association. ### Claim 9 (depends on 8) The method of claim 8, wherein the information further includes an offset, and wherein the decrypting comprises modifying the RNTI based on the offset to identify the paging information. ### Claim 10 (depends on 1) The method of claim 1, wherein the paging message includes integrity protection code for the paging information, and wherein the decrypting comprises: generating a code based on the paging information; descrambling the integrity protection code based on a key; and comparing the generated code to the descrambled integrity protection code. ### Claim 11 (depends on 1) The method of claim 1, further comprising: transmitting one of a service request or a resume request to the BS; wherein the one of the service request or the resume request includes the paging information. ### Claim 12 An apparatus for wireless communication, comprising: an interface configured to: receive, from a base station (BS), during at least one of a registration procedure or a radio access network (RAN)-based Notification Area Update (RNAU), information indicating a mapping between different paging information and indices associated with the different paging information, and receive, from the BS, a paging message comprising encrypted paging information; and a processing system configured to: decrypt the encrypted paging information to identify an index included in the encrypted paging information, determine paging information corresponding to the index based on the mapping, and determine whether to communicate with the BS based on the paging information. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the mapping includes a fixed mapping, and the index is scrambled based on a shared key between a user equipment (UE) and the BS. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the encrypted paging information includes a temporary mobile subscriber identifier (TMSI) associated with a user equipment (UE), wherein the information includes an association of different TMSI with the different paging information, and the encrypted paging information is decrypted based on the association. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the information further includes an offset, and wherein the processing system is further configured to modify the TMSI based on the offset to identify the paging information. ### Claim 16 (depends on 12) The apparatus of claim 12, wherein the encrypted paging information includes a radio network temporary identifier (RNTI) associated with a user equipment (UE), wherein the information includes an association of different RNTI with the different paging information, and the encrypted paging information is decrypted based on the association. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the information further includes an offset, and wherein the processing system is further configured to modify the RNTI based on the offset to identify the paging information. ### Claim 18 (depends on 12) The apparatus of claim 12, wherein the paging message includes integrity protection code for the paging information, and wherein the processing system is further configured to: generate a code based on the paging information; descramble the integrity protection code based on a key; and compare the generated code to the descrambled integrity protection code. ### Claim 19 (depends on 12) The apparatus of claim 12, wherein the processing system is further configured to: transmit one of a service request or a resume request to the BS; wherein the one of the service request or the resume request includes the paging information. ### Claim 20 A method for wireless communication at an apparatus of a base station (BS), the method comprising: transmitting, to a user equipment (UE), during at least one of a registration procedure or a radio access network (RAN)-based Notification Area Update (RNAU), information indicating a mapping between different paging information and indices associated with the different paging information; encrypting paging information based on the information; and transmitting, to one of the UE or another BS for transmission to the UE, a paging message comprising the encrypted paging information. ### Claim 21 (depends on 20) The method of claim 20, wherein the encrypted paging information includes an index associated with the paging information. ### Claim 22 (depends on 21) The method of claim 21, further comprising receiving, from a core network, the mapping during one of paging of the UE or connection of the UE to the BS. ### Claim 23 (depends on 21) The method of claim 21, further comprising transmitting the mapping to the another BS. ### Claim 24 (depends on 20) The method of claim 20, further comprising: associating a radio network temporary identifier (RNTI) of the UE with the paging information, wherein the encrypted paging information includes the RNTI, wherein the information includes an association of different RNTI with the different paging information, and wherein the encrypting comprises encrypting the paging information based on the association. ### Claim 25 (depends on 24) The method of claim 24, further comprising transmitting the RNTI of the UE associated with the paging information to the another BS. ### Claim 26 An apparatus for wireless communication, comprising: a processing system configured to encrypt paging information based on information indicating a mapping between different paging information and indices associated with the different paging information; and an interface configured to: output, for transmission to one of a user equipment (UE) or a base station to transmit to the UE, during at least one of a registration procedure or a radio access network (RAN)-based Notification Area Update (RNAU), the information indicating the mapping, and output, for transmission to the one of the UE or the base station to transmit to the UE, a paging message comprising the encrypted paging information. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the encrypted paging information includes an index associated with the paging information. ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the processing system is further configured to: associate a radio network temporary identifier (RNTI) of the UE with the paging information, wherein the encrypted paging information includes the RNTI, wherein the information includes an association of different RNTI with the different paging information, and the paging information is encrypted based on the association.