Method, device and computer program product for wireless communication
Storing S-CSCF information in UDR during UE registration addresses IMS service interruptions by allowing I-CSCF to retrieve this information directly, ensuring uninterrupted IMS services even in HSS failure scenarios.
Patent Information
- Application Number
- PCT/CN2023/143574
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-03
AI Technical Summary
Current mechanisms for restoring voice services in the IP Multimedia Subsystem (IMS) fail to avoid service interruptions when Network Functions (NFs) fail, leading to user complaints and reduced operator reputation.
Storing S-CSCF information in a Unified Data Repository (UDR) during UE registration, allowing I-CSCF to retrieve this information directly in case of HSS failure, ensuring seamless IMS service continuity.
Ensures uninterrupted IMS services by enabling I-CSCF to retrieve S-CSCF information from UDR even when HSS fails, preventing service disruptions and user complaints.
Smart Images

Figure CN2023143574_03072025_PF_FP_ABST
Abstract
Description
METHOD, DEVICE AND COMPUTER PROGRAM PRODUCT FOR WIRELESS COMMUNICATIONTECHNICAL FIELD
[0001] This document is directed generally to wireless communications, and in particular to 5th generation (5G) communications or 6th generation (6G) communications.BACKGROUND
[0002] In 4G field, the voice service is provided by mobile operators via IP Multimedia Subsystem (IMS system) . The voice service is the most important service for mobile operators, accounting for the largest proportion of operating profits. The voice service is also very important for customers. If any failure cases happen, the user who cannot use this voice service will complain to operators. Too many user complaints will reduce these operators′reputation. Thus, the mobile operators will try their best to avoid IMS failure. They also consider the mechanisms to restore the service as soon as possible, if some Network Functions (NFs) in the IMS system fail. However, the current mechanisms of the restoration could not avoid interruption of the service. Such an interruption may also cause user complaints.SUMMARY
[0003] This document relates to methods, systems, and computer program products for a wireless communication.
[0004] One aspect of the present disclosure relates to a wireless communication method. The wireless communication method includes:
[0005] receiving, by a unified data storage unit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,
[0006] storing, by a unified data storage unit, the received IMS information.
[0007] Various embodiments may preferably implement the following features:
[0008] Preferably, in some embodiment of the present application, the IMS information comprises at least one of the following:
[0009] a Service Call Session Control Function, S-CSCF, address, and
[0010] a S-CSCF name.
[0011] Preferably, in some embodiments of the present application, the unified data storage unit comprises Unified Data Repository, UDR.
[0012] Preferably, in some embodiments of the present application, the IMS information is sent by a Unified Data Management, UDM.
[0013] Preferably, in some embodiments of the present application, the UDM is co-located with a Home Subscriber Server, HSS.
[0014] Preferably, in some embodiments of the present application, the UDM is triggered by a HSS to send the IMS information.
[0015] Preferably, in some embodiments of the present application, the IMS information is sent by a Serving-Call Session Control Function, S-CSCF.
[0016] Preferably, in some embodiments of the present application, the method further comprises:
[0017] storing the IMS information for the UE. The IMS information may be associated with an Identifier, ID of the UE.
[0018] Another aspect of the present disclosure relates to a wireless communication method for use in a unified data storage unit. In an embodiment, the wireless communication method includes:
[0019] receiving a retrieving request for a S-CSCF of a terminating UE,
[0020] transmitting a response message containing IMS information,
[0021] wherein the IMS information comprises at least one of the following:
[0022] a S-CSCF address and S-CSCF name.
[0023] Various embodiments may preferably implement the following features:
[0024] Preferably, in some embodiments of the present application, the unified data storage unit comprises UDR.
[0025] Preferably, in some embodiments of the present application, the method is implemented when the HSS fails.
[0026] Preferably, in some embodiments of the present application, the retrieving request is sent by an Interrogating Call Session Control Function, I-CSCF.
[0027] Preferably, in some embodiments of the present application, the retrieving request is sent by an IMS AS.
[0028] Preferably, in some embodiments of the present application, the retrieving request is triggered by a request from the I-CSCF.
[0029] Preferably, in some embodiments of the present application, the retrieving request is forwarded by an IMS AS.
[0030] Another aspect of the present disclosure relates to a wireless communication method. In an embodiment, the wireless communication method includes:
[0031] transmitting, an IP Multimedia Subsystem, IMS information for a User Equipment, UE. The IMS information may be stored by a unified data storage unit.
[0032] Preferably, in some embodiments of the present application, the IMS information comprises at least one of the following:
[0033] a Service Call Session Control Function, S-CSCF, address, and
[0034] a S-CSCF name.
[0035] Another aspect of the present disclosure relates to a wireless communication method. In an embodiment, the wireless communication method includes:
[0036] transmitting a retrieving request for a S-CSCF of a terminating UE,
[0037] receiving a response message containing IMS information from a unified data storage unit.
[0038] The IMS information may comprise at least one of the following:
[0039] a S-CSCF address and S-CSCF name.
[0040] Another aspect of the present disclosure relates to a wireless communication node. In an embodiment, the wireless communication node includes:
[0041] a communication unit; and
[0042] a processor configured to:
[0043] receive, by a unified data storage unit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,
[0044] store, by a unified data storage unit, the received IMS information.
[0045] Another aspect of the present disclosure relates to a wireless communication node. In an embodiment, the wireless communication node includes:
[0046] a communication unit; and
[0047] a processor configured to:
[0048] receive a retrieving request for a S-CSCF of a terminating UE,
[0049] transmit a response message containing IMS information,
[0050] wherein the IMS information comprises at least one of the following:
[0051] a S-CSCF address and S-CSCF name.
[0052] Another aspect of the present disclosure relates to a wireless communication node. In an embodiment, the wireless communication node includes:
[0053] a communication unit; and
[0054] a processor configured to:
[0055] transmit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,
[0056] wherein the IMS information is stored by a unified data storage unit.
[0057] Another aspect of the present disclosure relates to a wireless communication node. In an embodiment, the wireless communication node includes:
[0058] a communication unit; and
[0059] a processor configured to:
[0060] transmit a retrieving request for a S-CSCF of a terminating UE,
[0061] receive a response message containing IMS information from a unified data storage unit,
[0062] wherein the IMS information comprises at least one of the following:
[0063] a S-CSCF address and S-CSCF name.
[0064] The present disclosure relates to a computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a wireless communication method recited in any one of foregoing methods.
[0065] The exemplary embodiments disclosed herein are directed to providing features that will become readily apparent by reference to the following description when taken in conjunction with the accompanying drawings. In accordance with various embodiments, exemplary systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure.
[0066] Thus, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and / or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
[0067] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0068] FIG. 1 shows an example of a schematic diagram of the registration process of the UE.
[0069] FIG. 2 shows an example of a schematic diagram of a terminating session.
[0070] FIG. 3 shows an example of a schematic diagram of a first embodiment of an option of S-CSCF storage in the UDR during the registration procedure.
[0071] FIG. 4 shows an example of a schematic diagram of a second embodiment of another option of S- CSCF storage in the UDR during the registration procedure.
[0072] FIG. 5 shows an example of a schematic diagram of a first embodiment of a process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session.
[0073] FIG. 6 shows an example of a schematic diagram of a second embodiment of another process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session.
[0074] FIG. 7 shows an example of a schematic diagram of a third embodiment of another process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session.
[0075] FIG. 8 shows an example of a flowchart for a wireless communication method in the present application.
[0076] FIG. 9 shows an example of another flowchart for a wireless communication method in the present application.
[0077] FIG. 10 shows an example of another flowchart for a wireless communication method in the present application.
[0078] FIG. 11 shows an example of another flowchart for a wireless communication method in the present application.
[0079] FIG. 12 shows an example of a schematic diagram of a wireless communication node.DETAILED DESCRIPTION
[0080] FIG. 1 illustrates an embodiment, in which the registration process of the UE is described.
[0081] S101: After the UE has obtained IP connectivity, it can initiate registration. The UE sends the registration information flow to a proxy (Public User Identity, Private User Identity, home network domain name, UE IP address, Instance Identifier, Globally Routable User agent URI, GRUU Support Indication) .
[0082] S102: Upon receipt of the registration information flow, the Proxy-Call Session Control Function, P-CSCF shall examine the “home domain name” to discover the entry point to the home network (i.e. the Interrogating-Call Session Control Function, I-CSCF) and then forward the registration request to the selected I-CSCF (P-CSCF address / name, Public User Identity, Private User Identity, P-CSCF network identifier, UE IP address) . The P-CSCF network identifier is a string that identifies at the home network, the network where the P-CSCF is located.
[0083] S103: Upon receipt of the registration information, the I-CSCF shall send the Cx-Query / Cx-Select-Pull information flow to the Home Subscriber Server, HSS (Public User Identity, Private User Identity, P-CSCF network identifier) .
[0084] S104: The HSS shall check whether the UE is registered already. The HSS shall indicate whether the UE is allowed to register in that P-CSCF network (identified by the P-CSCF network identifier) according to the UE subscription and operator limitations / restrictions if any. The Cx-Query Resp / Cx-Select-Pull Resp is sent from the HSS to the I-CSCF and includes S-CSCF name and the S-CSCF capabilities.
[0085] S105: The I-CSCF, using the name of the S-CSCF, shall determine the address of the S-CSCF through a name-address resolution mechanism. I-CSCF shall then send the registration information flow (P-CSCF address / name, Public User Identity, Private User Identity, P-CSCF network identifier, UE IP address) to the selected S-CSCF. The selected S-CSCF shall store the P-CSCF address / name or the P-CSCF Network ID information in order to forward the subsequent terminating session signaling to the UE.
[0086] S106: The S-CSCF shall send Cx-Put / Cx-Pull (Public User Identity, Private User Identity, S-CSCF name) to the HSS.
[0087] S107: The HSS shall store the S-CSCF name for that UE and return the information flow Cx-Put Resp / Cx-Pull Resp (UE information) to the S-CSCF. The UE information passed from the HSS to the S-CSCF shall include one or more names / addresses information which can be used to access the platform (s) used for service control while the UE is registered at this S-CSCF. The S-CSCF shall store the information for the indicated use.
[0088] S108: The S-CSCF shall return the “200 OK” information flow (home network contact information, a GRUU set) to the I-CSCF, and the I-CSCF shall forward the “200 OK” to the P-CSCF and the P-CSCF then will forward “200 OK” to the UE.
[0089] Referring to FIG. 2, it represents an embodiment in which the terminating session is explained.
[0090] Specifically, HSS / UDM (Unified Data Management) stores authentication data and subscription data of IMS subscribers. When one HSS / UDM instance fails, other HSS / UDM instances in the same set could provide services to I- / S-CSCF and IMS Application Server, IMS AS. In this case, there is no impact on IMS services. But once all the HSS / UDM instances in the set are all unavailable, most IMS procedures (e.g. IMS (re-) registration, IMS deregistration, mobile terminating session, AS originating session, supplementary services such as IP Short Message Service, SMS, etc. ) are impacted which results the service failure.
[0091] FIG. 2 describes the HSS failure during the terminating session. Specifically, the process of terminating session is illustrated in FIG. 2:
[0092] S201: The S-CSCF in the originating network receives a request destined to the terminating UE in a different network.
[0093] S202: The S-CSCF forwards the request to the I-CSCF in the terminating network.
[0094] S203: The I-CSCF queries HSS in order to determine the next hop in the routing path for the terminating UE and receives no response or the I-CSCF detects the overload of the HSS. Then the terminating session fails and I-CSCF will response to the S-CSCF in the originating network with a proper failure cause.
[0095] In the present application, in order to the make the terminating session successful in case of HSS failure, it should ensure that the I-CSCF can retrieve the S-CSCF serving for the terminated UE.
[0096] In some embodiments, it is proposed to consider storing the S-CSCF address in Unified Data Repository, UDR. In such case, even if an HSS / UDM fails, the I-CSCF can retrieve the serving S-CSCF from the UDR via a Unified Data Management, UDM. It can work even if the selected UDM and the failed UDM are not in the same set. In order to reach this technical effect, the registration method should be modified or improved.
[0097] Embodiment I
[0098] FIG. 3 describes an option of S-CSCF storage in the UDR during the registration procedure. Compared to the registration method described above, the main distinct step is as the following:
[0099] S307a (corresponding to S107) : If the HSS and the UDM is co-located, the UDM invoke the Nudr_DataRepository_Create / Update (IMSPara) to the UDR to store the S-CSCF name for that UE. The storage of IMS parameters may use the UE ID as an index and includes at least one parameter as the following: S-CSCF name and S-CSCF address. The UDR stores such data and returns a response to the UDM.
[0100] Details of other steps in this regard can be ascertained with reference to FIG. 1 and its description, and will not be repeated herein.
[0101] Embodiment II
[0102] FIG. 4 describes another option of S-CSCF storage in the UDR during the registration procedure. Compared to the registration method described above, the main distinct step is as the following:
[0103] S407b (corresponding to S107) : The S-CSCF invokes the Nudr_DataRepository_Create / Update (IMSPara) to the UDR to store the S-CSCF name for that UE. The storage of IMS parameters may use the UE ID as an index and includes at least one parameter as the following: S-CSCF name and S-CSCF address. The UDR stores such data and returns a response to the S-CSCF.
[0104] Details of other steps in this regard can be ascertained with reference to FIG. 1 and its description, and will not be repeated herein.
[0105] Embodiment III
[0106] FIG. 5 describes a process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session.
[0107] S501: The S-CSCF in the originating network receives a request destined to the terminating UE in a different network.
[0108] S502: The S-CSCF forward the request to the I-CSCF in the terminating network.
[0109] S503: The I-CSCF queries HSS to determine the next hop in the routing path for the terminating UE and receives no response or the I-CSCF detects the overload of the HSS.
[0110] S504: The I-CSCF invokes the Nudr_DataRepository_query (IMSPara) to retrieve the S-CSCF name / address from the UDR. On success, the UDR shall respond with “200 OK” with the message body containing the IMS parameters (S-CSCF address / S-CSCF name) .
[0111] S505: I-CSCF, as per existing procedures, forwards the request towards the S-CSCF. S-CSCF process the MT procedure as normal.
[0112] The above-described process is implemented based on the assumption that, during the registration procedure, upon completion of registration, the S-CSCF information is stored in UDR (via the UDM or by itself) .
[0113] Embodiment IV
[0114] Referring to FIG. 6, it represents another process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session. The process comprises the following steps:
[0115] S601: The S-CSCF in the originating network receives a request destined to the terminating UE in a different network.
[0116] S602: The S-CSCF forward the request to the I-CSCF in the terminating network.
[0117] S603: The I-CSCF queries HSS in order to determine the next hop in the routing path for the terminating UE and receives no response or the I-CSCF detects the overload of the HSS.
[0118] S604: The I-CSCF forwards invite to the IMS AS.
[0119] S605: The IMS AS invokes the Nudr_DataRepository_query (IMSPara) to retrieve the S-CSCF name / address from the UDR. On success, the UDR shall respond with “200 OK” with the message body containing the IMS parameters (S-CSCF address / S-CSCF name) .
[0120] S606: The IMS AS, as per existing procedures, forwards the request towards the S-CSCF. S-CSCF processes the MT procedure as normal.
[0121] In this process, the IMS AS may be a new server to handle the IMS parameter query from the UDR to avoid requiring the I-CSCF to support service-based interface toward the UDR. This Server can also be co-located with other existing servers.
[0122] Embodiment V
[0123] Referring to FIG. 7, it represents another process retrieving S-CSCF address from UDR in case of the HSS failure during the terminating session. The process comprises the following steps:
[0124] S701: The S-CSCF in the originating network receives a request destined to the terminating UE in a different network.
[0125] S702: The S-CSCF forwards the request to the I-CSCF in the terminating network.
[0126] S703: The I-CSCF queries HSS in order to determine the next hop in the routing path for the terminating UE and receives no response or the I-CSCF detects the overload of the HSS.
[0127] S704: The I-CSCF forwards invite to the IMS AS.
[0128] S705: The IMS AS invokes the Nudr_DataRepository_query (IMSPara) to retrieve the S-CSCF name / address from the UDR. On success, the UDR shall respond with “200 OK” with the message body containing the IMS parameters (S-CSCF address / S-CSCF name) .
[0129] In some deployment, IMS AS may configure the S-CSCF by OAM. In this case, the IMS AS skips step S705 and redirects the invite request to the S-CSCF based on the configuration.
[0130] S706: The IMS AS, as per existing procedures, forwards the request towards the S-CSCF. S-CSCF processes the MT procedure as normal.
[0131] The IMS AS may be a new server to handle the IMS parameter query from the UDR to avoid requiring the I-CSCF to support service-based interface toward to the UDR. This Server can also be co-located with another existing server.
[0132] According to the above illustrated processes, the present application provides a wireless communication method for solving the problem of HSS failures in IMS service. During the UE registration procedure, upon completion of registration, the S-CSCF information is stored in a unified data storage unit, for example UDR (via the UDM or by itself) . In case of HSS failure, the I-CSCF retrieves S-CSCF information from the UDR directly.
[0133] Specifically, referring to FIG. 8, the wireless communication method comprises:
[0134] S801: receiving, by a unified data storage unit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,
[0135] S802: storing, by a unified data storage unit, the received IMS information.
[0136] According to the present application, during UE registration procedure, the IMS information including S-CSCF address and / or S-CSCF name is received and stored by a unified data storage unit. In this condition, even if the HSS fails, the I-CSCF in the terminating network can still retrieve the demanding IMS information from the unified data storage. Hence, the IMS service is not disturbed by the failure of HSS.
[0137] As described above, in an embodiment of the present application, the IMS information may comprise at least one of the following: S-CSCF address and S-CSCF name. Alternatively, the unified data storage unit can be configured as Unified Data Repository, UDR. Alternatively, the unified data storage unit can also be configured as comprising any new designed data storage unit.
[0138] In an embodiment of the present application, the IMS information can be sent by a Unified Data Management, UDM. In the condition where the UDM is co-located with HSS, the IMS information can be then sent by an HSS. In the condition where the UDM is not co-located with HSS, then the UDM can store the IMS information and be triggered by the HSS to send the IMS information.
[0139] Alternatively, in an embodiment of the present application, the IMS information is sent by a S-CSCF.
[0140] In an embodiment of the present application, the received IMS information can be indexed with the UE ID, which means the IMS information is associated with the UE ID.
[0141] Based on the concept of the present application, a wireless communication method is provided to avoid the IMS service interruption due to the HSS failure. Specifically, in the wireless communication method, the IMS information including the S-CSCF address and / or S-CSCF name can be also stored in a unified data storage unit. Hence, the IMS information can still be retrieved even if the HSS fails.
[0142] The present application provides a wireless communication method for use in a unified data storage unit. Referring to FIG. 9, the method comprises the following steps:
[0143] S901: receiving a retrieving request for a S-CSCF of a terminating UE,
[0144] S902: transmitting a response message containing IMS information.
[0145] In the present application, the IMS information can comprise at least one of the following: a S-CSCF address and S-CSCF name.
[0146] As described above, in an embodiment of the present application, the unified data storage unit can comprise the UDR. Alternatively, it is also possible that a new established data storage unit can be applied to store the IMS information.
[0147] As already explained, the method is preferably implemented when the HSS fails. Otherwise, the retrieving of S-CSCF address can be conducted through the HSS. Specifically, the retrieving request can be sent by the I-CSCF.
[0148] Alternatively, the I-CSCF can only forward the retrieving request to an IMS AS, which can then send the retrieving request for S-CSCF name and / or address. In this condition, the retrieving request sent by the IMS AS can be triggered by the I-CSCF.
[0149] Alternatively, the retrieving request can also be forwarded by the IMS AS.
[0150] According to the present application, the IMS AS may be a new server to handle the IMS information query from the unified data storage unit to avoid requiring the I-CSCF to support service-based interface toward the unified data storage unit. This Server can also be co-located with other existing servers.
[0151] Referring to FIG. 10, in an embodiment, the wireless communication method includes:
[0152] S1001: transmitting, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,
[0153] wherein the IMS information is stored by a unified data storage unit.
[0154] Details in this regard can be ascertained with reference to the paragraphs above, and will not be repeated herein.
[0155] Referring to FIG. 11, in an embodiment, the wireless communication method includes:
[0156] S1101: transmitting a retrieving request for a S-CSCF of a terminating UE,
[0157] S1102: receiving a response message containing IMS information from a unified data storage unit,
[0158] wherein the IMS information comprises at least one of the following:
[0159] a S-CSCF address and S-CSCF name.
[0160] Details in this regard can be ascertained with reference to the paragraphs above, and will not be repeated herein.
[0161] FIG. 12 relates to a diagram of a wireless communication node 120 according to an embodiment of the present disclosure. The wireless communication node 120 may be a satellite, a base station (BS) , a gNB, a network entity, a Domain Name System (DNS) server, a Mobility Management Entity (MME) , Serving Gateway (S-GW) , Packet Data Network (PDN) Gateway (P-GW) , a radio access network (RAN) , a next generation RAN (NG-RAN) , a data network, a core network, a communication node in the core network, or a Radio Network Controller (RNC) , and is not limited herein. In addition, the wireless communication node 120 may include (perform) at least one network function such as an access and mobility management function (AMF) , a session management function (SMF) , a user place function (UPF) , a policy control function (PCF) , an application function (AF) , etc. The wireless communication node 120 may be used to implement the network function, such as PCF, described in this disclosure. The wireless communication node 120 may include a processor 1200 such as a microprocessor or ASIC, a storage unit 1210 and a communication unit 1220. The storage unit 1210 may be any data storage device that stores a program code 1212, which is accessed and executed by the processor 1200. Examples of the storage unit 1212 include but are not limited to a SIM, ROM, flash memory, RAM, hard-disk, and optical data storage device. The communication unit 1220 may be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to processing results of the processor 1200. In an embodiment, the communication unit 1220 transmits and receives the signals via at least one antenna 1222 or via wiring.
[0162] In an embodiment, the storage unit 1210 and the program code 1212 may be omitted. The processor 1200 may include a storage unit with stored program code.
[0163] The processor 1200 may implement any steps described in exemplified embodiments on the wireless communication node 120, e.g., via executing the program code 1212.
[0164] The communication unit 1220 may be a transceiver. The communication unit 1220 may as an alternative or in addition be combining a transmitting unit and a receiving unit configured to transmit and to receive, respectively, signals, messages, or information to and from a wireless communication node or a wireless communication device.
[0165] In some embodiments, the wireless communication node 120 may be used to perform the operations of the network function, for example, PCF described in this disclosure. In some embodiments, the processor 1200 and the communication unit 1220 collaboratively perform the operations described in this disclosure. For example, the processor 1200 performs operations and transmit or receive signals through the communication unit 1220.
[0166] While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand exemplary features and functions of the present disclosure. Such persons would understand, however, that the present disclosure is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any one of the above-described exemplary embodiments.
[0167] It is understood that, in the present disclosure, the term “and / or” or symbol “ / ” may include any and all combinations of one or more of the associated listed items. For example, A and / or B and / or C includes any and all combinations of one or more of A, B, and C, including A, B, C, A and B, A and C, B and C, and a combination of A and B and C. Likewise, A / B / C includes any and all combinations of one or more of A, B, and C, including A, B, C, A and B, A and C, B and C, and a combination of A and B and C.
[0168] It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
[0169] Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any one of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0170] A skilled person would further appreciate that any one of the various illustrative logical blocks, units, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software unit” ) , or any combination of these techniques.
[0171] To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure. In accordance with various embodiments, a processor, device, component, circuit, structure, machine, unit, etc. can be configured to perform one or more of the functions described herein. The term “configured to” or “configured for” as used herein with respect to a specified operation or function refers to a processor, device, component, circuit, structure, machine, unit, etc. that is physically constructed, programmed and / or arranged to perform the specified operation or function.
[0172] Furthermore, a skilled person would understand that various illustrative logical blocks, units, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general-purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, units, and circuits can further include antennas and / or transceivers to communicate with various components within the network or within the device. A general-purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein. If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.
[0173] Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
[0174] In this document, the term "unit" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various units are described as discrete units; however, as would be apparent to one of ordinary skill in the art, two or more units may be combined to form a single unit that performs the associated functions according to embodiments of the present disclosure.
[0175] Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present disclosure. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
[0176] Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of the claims. Thus, the disclosure is not intended to be limited to the implementations shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims
1.A wireless communication method comprising:receiving, by a unified data storage unit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,storing, by a unified data storage unit, the received IMS information.2.The wireless communication method according to claim 1,wherein the IMS information comprises at least one of the following:a Service Call Session Control Function, S-CSCF, address, anda S-CSCF name.3.The wireless communication method according to claim 2, wherein the unified data storage unit comprises Unified Data Repository, UDR.4.The wireless communication method according to claim 3, wherein the IMS information is sent by a Unified Data Management, UDM.5.The wireless communication method according to claim 4, wherein the UDM is co-located with a Home Subscriber Server, HSS.6.The wireless communication method according to claim 4, wherein the UDM is triggered by a HSS to send the IMS information.7.The wireless communication method according to claim 3, wherein the IMS information is sent by a Serving-Call Session Control Function, S-CSCF.8.The wireless communication method according to any of claims 3 to 7, further comprises:storing the IMS information for the UE,wherein the IMS information is associated with an Identifier, ID of the UE.9.A wireless communication method for use in a unified data storage unit, comprising:receiving a retrieving request for a S-CSCF of a terminating UE,transmitting a response message containing IMS information,wherein the IMS information comprises at least one of the following:a S-CSCF address and S-CSCF name.10.The wireless communication method according to claim 9, wherein the unified data storage unit comprises UDR.11.The wireless communication method according to claim 9, wherein the method is implemented when the HSS fails.12.The wireless communication method according to claim 11, wherein the retrieving request is sent by an Interrogating Call Session Control Function, I-CSCF.13.The wireless communication method according to claim 11, wherein the retrieving request is sent by an IMS AS.14.The wireless communication method according to claim 13, wherein the retrieving request is triggered by a request from the I-CSCF.15.The wireless communication method according to claim 13, wherein the retrieving request is forwarded by an IMS AS.16.A wireless communication method comprising:transmitting, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,wherein the IMS information is stored by a unified data storage unit.17.The wireless communication method according to claim 16,wherein the IMS information comprises at least one of the following:a Service Call Session Control Function, S-CSCF, address, anda S-CSCF name.18.A wireless communication method comprising:transmitting a retrieving request for a S-CSCF of a terminating UE,receiving a response message containing IMS information from a unified data storage unit,wherein the IMS information comprises at least one of the following:a S-CSCF address and S-CSCF name.19.A wireless communication node, comprising:a communication unit; anda processor configured to:receive, by a unified data storage unit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,store, by a unified data storage unit, the received IMS information.20.A wireless communication node, comprising:a communication unit; anda processor configured to:receive a retrieving request for a S-CSCF of a terminating UE,transmit a response message containing IMS information,wherein the IMS information comprises at least one of the following:a S-CSCF address and S-CSCF name.21.A wireless communication node, comprising:a communication unit; anda processor configured to:transmit, an IP Multimedia Subsystem, IMS information for a User Equipment, UE,wherein the IMS information is stored by a unified data storage unit.22.A wireless communication node, comprising:a communication unit; anda processor configured to:transmit a retrieving request for a S-CSCF of a terminating UE,receive a response message containing IMS information from a unified data storage unit,wherein the IMS information comprises at least one of the following:a S-CSCF address and S-CSCF name.23.A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a wireless communication method recited in any one of claims 1 to 18.
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