# US 8,543,156 B2 · Interface authorization scheme > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,543,156 B2 - Document ID: US8543156B2 - Status: Granted - Kind: B2 - Application number: 13/467,821 - Filed: 2012-05-09 - Published: 2012-08-30 - Granted: 2013-09-24 - Earliest claimed: 2008-12-30 - Assignees: QUALCOMM Incorporated - Applicants: Rajarshi Gupta - Inventors: Rajarshi Gupta - Web page: https://patentgrep.com/patent/US8543156B2 ## CPC - H04L 63/102: {Entity profiles} - H04W 92/20: between access points - 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 An authorization scheme controls whether an interface is established between communication nodes. Such a scheme may be used, for example, to determine whether to establish a direct interface (e.g., an X2 interface) between a pair of access points. A decision to establish a direct interface between nodes may be based on a node type of one or both of the nodes. A decision to establish a direct interface between nodes may be based on whether the nodes belong to the same group. ## Claims ### Claim 1 A method of communication, comprising: identifying a first base station and a second base station for establishing an interface; determining a type of the second base station; determining whether to transmit a request to initiate establishing the interface based at least in part on the type of the second base station and a type of the first base station; and transmitting the request to the second base station based on the determination of whether to transmit the request. ### Claim 2 (depends on 1) The method of claim 1, wherein the determination of whether to transmit the request is further based on whether the type of the second base station is a macro access point or a femto access point. ### Claim 3 (depends on 1) The method of claim 1, wherein the request is transmitted if the type of the first base station is a macro access point and the type of the second base station is a macro access point. ### Claim 4 (depends on 1) The method of claim 1, wherein the request is transmitted if the type of the first base station is a macro access point and the type of the second base station is a femto access point. ### Claim 5 (depends on 1) The method of claim 1, wherein the request is not transmitted if the type of the first base station is a femto access point and the type of the second base station is a macro access point. ### Claim 6 (depends on 1) The method of claim 1, wherein the request is transmitted if the type of the first node base station is a femto access point and the type of the second base station is a femto access point. ### Claim 7 (depends on 1) The method of claim 1, wherein the determination of whether to transmit the request comprises determining whether the first base station and the second base station belong to a common group. ### Claim 8 (depends on 7) The method of claim 7, wherein the determination of whether the first base station and the second base station belong to the common group comprises determining whether the first base station and the second base station belong to a common closed subscriber group. ### Claim 9 (depends on 7) The method of claim 7, wherein the determination of whether the first base station and the second base station belong to the common group comprises determining whether the first base station and the second base station belong to a common enterprise. ### Claim 10 (depends on 7) The method of claim 7, wherein the determination of whether the first base station and the second base station belong to the common group comprises determining whether the first base station and the second base station are under a common gateway. ### Claim 11 (depends on 1) The method of claim 1, wherein the determination of the type is based on one or more of an identifier of the second base station, information obtained about the second base station before the identification of the second base station, or a combination thereof ### Claim 12 (depends on 1) The method of claim 1, wherein the interface comprises a direct access point to access point interface. ### Claim 13 (depends on 1) The method of claim 1, wherein the interface comprises an X2 interface. ### Claim 14 (depends on 1) The method of claim 1, wherein the request comprises a CSG indicator associated with one or more of the first base station or second base station. ### Claim 15 (depends on 1) The method of claim 1, wherein the determination of whether to transmit the request comprises determining whether the second base station is associated with a CSG. ### Claim 16 (depends on 15) The method of claim 15, further comprising transmitting a handover request to the second base station, the handover request corresponding to a UE that is associated with the CSG and served by the first base station. ### Claim 17 An apparatus for communication, comprising: an interface authorization controller, the interface authorization controller being configured: to identify a first base station and a second base station for establishing an interface, to determine a type of the second base station, and to determine whether to transmit a request to initiate establishing the interface based at least in part on the type of the second base station and a type of the first base station; and a communication controller configured to transmit the request to the second base station based on the determination of whether to transmit the request. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the determination of whether to transmit the request is further based on whether the type of the second base station is a macro access point or a femto access point. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein the determination of whether to transmit the request comprises determining whether the first base station and the second base station belong to a common group. ### Claim 20 (depends on 17) The apparatus of claim 17, wherein the interface comprises an X2 interface. ### Claim 21 (depends on 17) The apparatus of claim 17, wherein the request comprises a CSG indicator associated with one or more of the first base station or second base station. ### Claim 22 (depends on 17) The apparatus of claim 17, wherein the interface authorization controller determines whether to transmit the request further based on whether the second base station is associated with a CSG. ### Claim 23 An apparatus for communication, comprising: means for identifying a first base station and a second base station for establishing an interface; means for determining a type of the second base station; means for determining whether to transmit a request to initiate establishing the interface based at least in part on the type of the second base station and a type of the first base station; and means for transmitting the request to the second base station based on the determination of whether to transmit the request. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the determination of whether to transmit the request is further based on whether the type of the second node is a macro access point or a femto access point. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the determination of whether to transmit the request comprises determining whether the first base station and the second base station belong to a common group. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the interface comprises an X2 interface. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein the request comprises a CSG indicator associated with one or more of the first base station or second base station. ### Claim 28 (depends on 23) The apparatus of claim 23, wherein the means for determining whether to transmit the request further determines whether to transmit the request based on whether the second base station is associated with a CSG. ### Claim 29 A computer-program product, comprising: a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising: program code to identify a first base station and a second base station for establishing an interface; program code to determine a type of the second base station; program code to determine whether to transmit a request to initiate establishing the interface based at least in part on the type of the second base station and a type of the first base station; and program code to transmit the request to the second base station based on the determination of whether to transmit the request. ### Claim 30 (depends on 29) The computer-program product of claim 29, further comprising program code to determine whether to transmit the request based on whether the type of the second base station is a macro access point or a femto access point. ### Claim 31 (depends on 29) The computer-program product of claim 29, further comprising program code to determine whether to transmit the request based on whether the first base station and the second base station belong to a common group. ### Claim 32 (depends on 29) The computer-program product of claim 29, wherein the interface comprises an X2 interface. ### Claim 33 (depends on 29) The computer-program product of claim 29, wherein the request comprises a CSG indicator associated with one or more of the first base station or second base station. ### Claim 34 (depends on 29) The computer-program product of claim 29, further comprising program code to determine whether to transmit the request based on whether the second base station is associated with a CSG.