TW201014299A - Session initiation protocol registration with ping - Google Patents

Abstract

Systems and methodologies are described that facilitate improving session initiation protocol based registration of a mobile device and an IP multimedia subsystem in wireless communications. The mobile device discovers one or more SIP servers (e.g., proxy call session control functions) that are available. The mobile device issues a ping message to each discovered server in parallel to determine reachability. Based at least in part on measured round trip times associated with the ping messages, the mobile device initiates registration procedures with at least one server.

Description

201014299 IX. Description of the Invention: [Technical Field of the Invention] The following description relates generally to wireless communication, and more particularly to improving call initial agreement registration by determining reachability by using an echo check message. This application claims to apply for the method and apparatus for optimizing the registration procedure (METHOD AND APPARATUS FOR ' OPTIMIZING A REGISTRATION PROCEDURE) " US Patent Application No. 60 on October 5, 2007 /978,072 right. The entire text of the above application is hereby incorporated by reference. [Prior Art] Wireless communication systems are widely deployed to provide various types of communication content such as voice, material, and the like. A typical wireless communication system can be a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, ...). Examples of such multiple access systems may include a code division multiple access (CDMA) system, a time division multiple access (TDMA) reference system, a frequency division multiple access (FDMA) system, and orthogonal frequency division multiple access (OFDMA). ) systems, and similar systems. In addition, such systems may conform to specifications such as Third Generation Partnership Project (3GPP), 3GPP2, 3GPP Long Term Evolution (LTE), and the like. 'Generally, wireless multiple access communication systems can simultaneously support communication for multiple mobile devices. Each mobile device can communicate with one or more base stations via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the base station to the mobile device, and the reverse link (or the upper 135236.doc 201014299 line-key) refers to the self-job device to the base station Communication link. In addition, the communication between the line and the base port can be established through a single input and single output (still (7) input single output (MISO) system, multiple input multiple output (MIM) system. In addition, the mobile device can be combined with other mobile devices (and / Or the base station and other base stations) communicate in a point-to-point wireless network configuration. The wireless channel system often uses the provide-coverage area or multiple bases. The typical base station can transmit multiple data streams for use in Broadcast, multicast or unicast service, the data stream may be a stream of data that can be independently received for the storage terminal. The access terminal in the coverage area of the base station can be used to receive the composite The stream carries one-to-one or all data streams. Similarly, the access terminal can transmit data to the base station or another access terminal. The system usually uses multiple (^) transmission antennas and multiple Receiver antenna for data transmission nw transmission antenna and ~ receiving antenna formed by the channel can be decomposed into two independent channels, these channels can be called spatial channels, where Each of the channels corresponds to a - dimension. In addition, the ΜΙΜ〇 system can provide improved performance (eg, increased spectral efficiency, higher throughput, and/or greater reliability) if additional dimensions are generated by multiple transmit and receive antennas. The following is a simplified summary of one or more embodiments in order to provide a basic understanding of the embodiments. This summary is not an extensive overview of the various embodiments. The scope of any or all of the embodiments is described. The sole purpose of the present invention is to present some concepts of one or more embodiments in a simplified form 135236.doc -6- 201014299 as a prelude to a more detailed description presented later. Various embodiments and their corresponding disclosures, in conjunction with improved call-initiated protocol-based registration of mobile devices and IP multimedia subsystems in mobile communications, describe various aspects of the available one or more SIP servers (eg, , proxy call control function). The mobile device sends an echo check message to each discovered server in parallel. Determining reachability. The mobile device initiates a registration procedure to at least one server based at least in part on the measured round trip time associated with the echo check message. According to related aspects, a method for facilitating registration of an improved call initial agreement is provided The method can include discovering a plurality of proxy servers. The method can also include transmitting an echo check message to each of the discovered proxy servers, wherein the echo check message solicits a return response. Additionally, the method can include measuring The round trip time associated with each echo check message. Additionally, the method can also include initiating a registration procedure for at least one of the discovered proxy servers based on the measured round trip time. An aspect is a communication device for facilitating registration of a call initial agreement. The communication device can include means for discovering a plurality of proxy servers. The communication device can also include means for transmitting an echo check message to each of the discovered agents. a component of the server, wherein the echo check message is requested to be sent back and the other device can be Comprising means for measuring a round trip time associated with each echo check message. Additionally, the communication device can also include a proxy server for initiating discovery to the discovered based on the measured round trip time A component of a registration procedure for at least one of the following. 135236.doc 201014299 A further aspect relates to a wireless communication device. The wireless communication device can include a memory that maintains instructions related to: discovering a plurality of proxy servers, The port B check message is transmitted to each of the discovered proxy servers, wherein the echo check message solicits a return response; measures the round trip time associated with each echo check message; and based on the measured round trip - Initiating a registration procedure for at least one of the discovered proxy servers. Further, the wireless communication device can further include a processor coupled to the memory, the processor configured to execute the memory The instructions kept in the middle of the order. In another aspect, the computer program product can have a computer readable medium. The computer readable medium can include code for causing a computer to discover a plurality of proxy servers. The computer readable medium can also include a code for causing the computer to transmit an echo check message to each of the discovered proxy servers, wherein the echo check message is requested to be sent back. In addition, the computer readable medium can also be Includes code for the computer to measure the round trip time associated with each echo check message. Additionally, the computer readable medium can include a program code for causing the computer to initiate a registration procedure to at least one of the discovered proxy servers based on the measured round trip time. Another aspect relates to devices in a wireless communication system. The device can include a processor configured to discover a plurality of proxy servers. The processor can also be configured to transmit an echo check message to each of the discovered proxy servers, wherein the echo check message seeks a return response. The processor can be further configured to measure the round trip associated with each echo check message 135236.doc 201014299 time. Additionally, the processor can be configured to initiate a registration procedure to at least one of the discovered proxy servers based on the measured round trip time. Another aspect described herein is a method for facilitating the registration of a call agreement for a mobile device. The method can include receiving a checkback message from the mobile device. The method can also include transmitting the returned message to the mobile device in response to the at least one echo check message. Moreover, the method can also include initiating registration with the mobile device based at least in part on the round trip time required to transmit and receive the at least one echo check message and the Xiao return message. Yet another aspect relates to a communication device that facilitates registration of a call initial agreement. The communication device can include means for receiving at least one echo check message from the mobile device. The communication device can also include means for transmitting the return message to the mobile device in response to the at least one lookback check message. Moreover, the communication device can include means for initiating registration with the mobile device based at least in part on the round trip time required to transmit and receive the at least one echo check message and the returned message. Another aspect described herein pertains to wireless communication devices that can include memory. The memory can maintain instructions relating to receiving at least one echo check message from the mobile device, transmitting the return message to the mobile device in response to the at least one echo check message, and based at least in part on transmitting and receiving the at least - The echo check message and the round trip time required to return the message initiate registration with the mobile device. In addition, the wireless communication device can also include a processor coupled to the memory configured to execute the instructions held in the memory at 135236.doc 201014299. Still another aspect relates to a computer program product, which can have a computer readable medium. The computer readable medium includes a code for causing a computer to receive at least one echo check message from a mobile device. The computer readable medium can also include a code for causing a computer to transmit a return message to the mobile device in response to the at least one echo check message, and further comprising the computer readable medium for causing the computer to be based at least in part on the transmission And receiving the at least one

The echo check message and the round trip time required to return the message initiate the registration of the code to the mobile device. Yet another aspect relates to devices in a wireless communication system. The apparatus can include a processor configured to receive at least one echo check message from the mobile device. The processor can also be configured to transmit the returned message to the mobile device in response to the at least one echo check message. Additionally, the processor can be configured to initiate registration with the mobile device based at least in part on the round trip time required to transmit and receive the at least one echo check message and the return message. In order to achieve the above and related ends, the one or more embodiments include the features fully described below and particularly pointed out in the claims. The detailed description of the one or more embodiments are set forth in the description and the drawings. However, such aspects are indicative of only a few of the various methods in which the principles of the various embodiments can be used and the described embodiments are intended to include all such aspects and their equivalents. [Embodiment] The same reference numerals are used throughout the drawings for the purposes of illustration and description. In the following description, 135236.doc • 10· 201014299 is described in numerous specific details in order to provide a thorough understanding of one or more embodiments. However, it will be apparent that the embodiment can be practiced without such specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments. As used in this application, the terms "component", "module", "system" and the like are intended to refer to a computer-related entity, or a combination of hardware and hardware, The software is either a software in execution. For example, group

The components may be, but are not limited to, processes executed on a processor, processor objects, executables, threads, programs, and/or computers. By way of illustration, both an application and a computing device executing on a computing device can be a component. One or more components can reside within a process and/or thread and a component can be limited to a computer and/or distributed between two or more computers. Moreover, such components can be executed from a variety of electrically readable media having various data structures stored therein. The components can communicate via a local and/or remote process, such as according to a signal, having _ or multiple data packets (eg, 'from-via the signal to another component in the regional system, the distributed system Interactions and/or information across components of the network such as the Internet interacting with other systems) In addition, various embodiments are described herein in connection with mobile devices. The mobile device can also be called system, subscriber unit, subscriber station mobile station, mobile camera, remote σ' remote terminal, access terminal, user terminal, terminal, wireless communication H, user agent , the time of the person or the user equipment. The mobile device can be a cellular phone, a wireless phone, a call initiation protocol (SIP) phone, a wireless zone loop (WLL) station, a personal digital assistant 135236.doc 201014299 (PDA), a wirelessly connected handheld device, a computing device or Connect to other processing devices of the wireless data modem. Moreover, various embodiments are described herein in connection with a base station. The base station can be used to communicate with mobile devices and can also be referred to as an access point, a Node B, an evolved Node B (eNode B or eNB), a base transceiver station (BTS), or some other terminology. Furthermore, the various aspects or features described herein can be implemented as a method, apparatus, or article of manufacture using standard stylized and/or engineering techniques. The term "article" as used herein is intended to encompass a computer program accessible from any computer readable device, 载体 carrier or media. For example, a computer readable medium may include, but is not limited to, a magnetic storage device ( For example, hard disks, flexible disks, magnetic strips, etc., optical discs (for example, compact discs (CDs), digital compact discs (DVDs), etc.), smart cards, and flash memory devices (for example, EPROMs, cards, sticks) In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" This may include, but is not limited to, wireless channels and other media that can store, contain and/or carry instructions and/or materials. The techniques described herein can be used in a variety of wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access ( OFDMA), single carrier frequency domain multiplexing (SC-FDMA) and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA includes Broadband-CDMA (W-CDMA) and other variants of CDMA. CDMA2000 coverage 135236.doc -12- 201014299 IS-2000, IS-95 and IS-856 standards. A TDMA system can implement a radio technology such as the Global System for Mobile Communications (GSM). The OFDMA system can implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.1 l (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDM, etc. UTRA and E -UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA, which uses OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-φ UTRA, UMTS, LTE, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). Referring now to Figure 1, a wireless communication system 100 is illustrated in accordance with various embodiments presented herein. System 100 includes Base station 102 may include multiple antenna groups. For example, one antenna group may include antennas 104 and 106, another group may include antennas 108 and 110, and additional groups may include antennas 112 and 114. For each antenna group description Two antennas; however, more or fewer antennas may be utilized for each group. Base station 102 may additionally include a transmitter chain and a receiver chain, each of which may include and transmit and receive signals Associated with a plurality of components (eg, processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by those skilled in the art. Or a plurality of mobile devices (such as mobile device 116 and mobile device 122) communicate; however, it should be appreciated that base station 102 can be associated with any number of actions of classes 135236.doc-13-201014299 that are similar to mobile devices 116 and 122. Communication devices 116 and 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or Any other suitable device for communication over the wireless communication system 100. As depicted, the mobile device 116 is in communication with antennas 112 and 114, wherein the antennas 112 and 114 transmit information to the mobile device 116 on the forward link U8 and are in opposition Information from the mobile device 116 is received on the link 120. Further, the 'mobile device 122 is in communication with the antennas® 4 and 106, wherein the antennas 104 and 106 transmit information to the mobile device 122 on the forward link 124 and are in the opposite direction. Information from the mobile device 122 is received on the link 126. In a frequency division duplex (Fdd) system, for example, the forward link 可 8 can utilize a frequency band different from the frequency band used by the reverse link 120, and the former The link 124 can use a frequency band different from the frequency band used by the reverse link 126. Additionally, in a time division duplex (TDD) system, the forward link n 8 and the reverse link 120 can utilize a common frequency band and Forward link 124 The common frequency band can be utilized by the reverse link 126. The area in which each antenna group and/or antenna is designated to communicate can be referred to as the sector of the base station 102. For example, the antenna group can be designed to be passed to The mobile device in the sector of the area covered by the base station 102. In the communication on the forward links 118 and 124, the transmission antenna of the base station !2 can be improved by beamforming for the forward direction of the mobile devices 116 and 122. The signal-to-noise ratio of links 118 and 124. This can be provided, for example, by using a precoder to manipulate the signals in the desired direction. In addition, when the base station 102 utilizes beamforming transmission to the mobile devices 116 and 122 135236.doc -14- 201014299 randomly distributed throughout the associated coverage, it is compared to a base station transmitted to all of its mobile devices via a single antenna. Mobile devices in neighboring cells can experience less interference. Moreover, in one example #动装置116 and 122 can communicate directly with one another using point-to-point or special techniques. According to an example, system 100 can be a multiple input multiple output (MIMO) system. Additionally, system 1 can generally utilize any type of duplexing technology (such as FDD, TDD, and the like) to divide communication channels. (eg 'forward link, reverse link, ....) Turning to Figure 2, a communication device 200 for use in a wireless communication environment is illustrated. The communication device 200 can be part of a base station or base station, action Any part of the device or mobile device, or substantially any communication device that receives the data transmitted in the wireless communication environment. In the communication system, the communication device 200 can use the components described below to enable selection of reachable before starting the registration process. The call initial protocol (sip) word server. The communication device 200 can include a Sip module 2〇2 that uses a call initiation protocol (SIP) (eg, a signaling association) to set up and/or disrupt a multimedia communication call. For example, SIP can be used to establish calls associated with applications such as, but not limited to, video conferencing, instant messaging, online gaming, streaming multimedia, and the like. In addition, sip can be utilized to establish a communication call within an ip Multimedia Subsystem (IMS) to enable a multimedia based service in a wireless communication system. According to an example, SIP module 202 can discover that communication device 200 and IMS are provided (not A SIP server between the interfaces shown, such as a proxy call control function (P-CSCF). For example, the SIP module 202 can obtain a P-CSCF entry from a Dynamic Host Configuration Protocol (DHCP) server. The list is found; gIP feed 135236.doc -15- 201014299 server. SIP module 202 does not guarantee that the discovered sip server is reachable. The P-CSCF item on the obtained list may be temporarily connected with the communication device. 2. Loss of contact or no longer in effect (eg, old items that must still be cleared). In one aspect, SIP module 202 initiates a registration procedure with the P-CSCF entry to determine reachability. Registration procedure Multiple attempts may be required such that it takes about thirty seconds to determine reachability for each item in the list. According to another aspect, the communication device 200 can further include an echo check module 204, the echo check module 2〇 4 can promote the identification of SIp The reachability of the server (eg, P-CSCF). The echo check module 2〇4 can transmit an echo check message to each sip server. In one aspect, the echo check module 2〇4 will be in parallel The echo check message is transmitted to all proxy servers. The echo check message is a mechanism by which the availability of a particular server/entity in the network can be tested. The echo check message solicits a response from the target (eg, proxy server or p_CSCF) Causes the target to return a response when it receives an echo check message. The reachable or available target returns a response and the unreachable target does not return the response. The echo check module 204 can measure the round trip time, which corresponds to the time required to send and receive a particular echo check message plus the time required to send and receive a response. In another example, the echo check module 204 can transmit a plurality of echo check messages to improve the reliability of the round trip time amount side. The echo check module 2G4 may aggregate all round trip time measurements and evaluate the average time, minimum time, maximum time, intermediate time, and/or any other statistical measure that may be applicable to the set of measurements. The communication device 200 can also include a server selection module 2〇6 that selects a feeder 135236.doc 201014299 (e.g., a proxy server or a Ρ-CSCF) from the reachable feeder. The achievable server includes the discovered server that sent a response to the echo check message transmitted by the echo check module 204. The server selection module 2〇6 selects the server with the lowest measured round trip time. In addition, the server selection module 206 can select a server having a lowest average round trip time, a minimum round trip time, a maximum round trip time, or an intermediate round trip time based on a plurality of measurements. In addition, it should be appreciated that the feeder selection module 206 can select a server based on a combination of statistical metrics. For example, the server selection module 206 can select a server having the lowest characteristic average travel time and also coupled to the second server and the server has a lower intermediate time than the second server. After selection, the SIP module 202 can initiate a registration procedure to the selected server. According to another aspect, communication device 200 can be processed by SIP registration to a first responder (e.g., in response to a first server, proxy server, or ρ. CSCF of the echo check message). During this initial registration period to the first responder, the intervening U can be ignored by the other feeders. The communication device 200 can maintain responses received from other food containers. Therefore, if the initial registration fails, the communication device 200 can attempt to register with other servers (receiving their responses). For example, the communication device 2 can use selection techniques such as the selection techniques described above. In addition, the communication device 2 can attempt to register with the second server that responds immediately. The communication device 2 can repeat this process as many times as necessary until a successful registration occurs. Moreover, although not shown, it should be appreciated that communication device 2 (10) may include memory that maintains instructions for the discovery server, proxy servo 135236.doc 201014299, and/or Ρ-CSCF' rumbling echo check message. Receiving an echo check message response, measuring the round trip time, selecting a server and the like based on the round trip time measurement. In addition, Keelong maintains instructions for aggregating and statistically analyzing measurements from multiple echo check messages to improve reliability. In addition, communication device 2GG can include a processor that can be utilized in conjunction with executing instructions (e.g., instructions maintained in memory, derived from xenon source, +, . . . ).

Referring now to Figure 3, there is illustrated a wireless communication system that facilitates determining the agent's reachability along the server prior to initiating the registration process. System_ includes an access terminal 3G2 (e.g., mobile device, user device, mobile terminal, ...) that can communicate with base station 304 (and/or any number of disparate devices (not shown)). The base station 304 can transmit information to the access terminal 3〇2 on the forward link channel or the downlink channel; in addition, the base station 3〇4 can be on the reverse link channel or the uplink channel. Information from the access terminal 302 is received. Additionally, system 300 can be a one-sided system. In addition, the system 3 can operate in an OFDMA wireless network (such as 3Gpp, 3Gpp2, 3Gpp, etc.). X, in the example, the components and functionality in the base station 304 shown and described below may be present in the access terminal device and the components and functionality in the access terminal 302 may be present at the base. Taiwan 3〇4. System 300 can further include an access network 306 that can perform the radio functionality of the wireless network and provide a connection to a core-network (not shown) that can interface with the public switched network. Or interface. The access network can be a radio access network, a UMTS terrestrial radio access network, a LET network, and an EV-DO network and the like. In addition, 135236.doc 201014299 access network 306 can include one or more radio network controllers (not shown) that control the utilization and reliability of radio resources. System 300 can also include a packet data server node (PDSN) 308 that can establish, maintain, and terminate point-to-point (PPP) calls associated with a mobile device such as access terminal 302. It should be appreciated that PDSN 308 can be a GPRS support node in a GSM or UMTS network or any other support node that manages PPP connections for a particular network. In addition, system 300 can include one or more P-CSCF servers 310 that enable access to the SIP registration of terminal 302 and facilitate access to terminal 302 and IMS (not The connection between the illustrations). In accordance with an illustration, access terminal 302 can communicate with base station 304 via an air or radio connection. Base station 304 includes an A8/A9 controller 312 that can establish an A8 and/or A9 interface between base station 304 and access network 306. In particular, the A8 interface carries user data between the base station 304 and the packet control function (not shown) of the access network 306. The A9 interface carries control or signaling information between the base station 304 and the access network 306. The access network 306, in turn, includes an A10/A11 controller 314 that facilitates establishing and utilizing the A10 and/or All interface between the access network 306 and the PDSN 308. Similar to the A8 and A9 interfaces, the A10 and All interfaces can carry user data and signaling information between the access network 306 and the PDSN 308, respectively. According to an example, the access terminal 302 can include a SIP application 316 that requires an IP connection (e.g., a multimedia communication call) to a multimedia service provided by the IMS. For example, the SIP application 316 can be a voice IP application, a multimedia streaming application, or any other multimedia-based application that requires IMS 135236.doc -19- 201014299. The access terminal 302 includes a SIP module 318' that facilitates the establishment of a multimedia communication call that can be used by the SIP application 316. The SIP module 3 18 can include a discovery module 320 that obtains a list of proxy servers (e.g., P-CSCF servers 310) that provide an interface between the access terminal 302 and the IP Multimedia subsystem. . The discovery module 320 can obtain a list of entries for each p-CSCF 310 from the DHCP server. According to one aspect, the p-CSCF 310 can register with the DHCP server upon startup to enable the DHCP server to establish an entry for the P-CSCF 310 on the list of available servers. In order to obtain the list, the access terminal 302 can send a message to the base station 304 over the air. The base station 3〇4 can forward the request to the access network 3〇6 via the A8 or A9 interface. The access network 〇6 may request the PDSN 308 to establish a PPP connection for accessing the terminal 302 via the A10 or A11 interface. The access terminal 3〇2 can then access the server or other components using a protocol based protocol. An echo check module 322 is provided that transmits an echo check message to each of the agents in the list obtained by the discovery module 320 to determine which of the servers in the list are reachable. According to one aspect, the echo check module 322 can send the echo check message to all of the servers in parallel. The echo check module 322 can include a round trip evaluator 324 that is based on the time of the echo check message transmission. The round trip time is measured by stamping the timestamp associated with the return response. The server selection module 326 can select a proxy server from a set of reachable servers. The reachable server is the server that returns a response to the echo check message. According to one aspect, the server selection module 326 can select a proxy server having a minimum round trip time as determined by the round trip line 135236.doc -20- 201014299 process evaluator 324. After selection, SIP module 318 can initiate SIP registration with the selected proxy server to enable the establishment of a multimedia communication call for SIP application 316. In addition, the server selection module 326 can arrange all reachable servers based on the measured round trip time and in turn initiate registration with each of the queued servers until a multimedia call is established. 4 illustrates an example of selecting a proxy server (eg, P-CSCF) and registering with a proxy server (eg, P-CSCF) in accordance with aspects of the present disclosure. Call Flow 400 » Call Flow 400 includes an access terminal (AT), access network (AN), and packet data server (PDSN). Call flow 400 is described in the context of Internet Protocol Voice (VoIP) features in the lxEV-DO Rev. A system. However, it should be appreciated that the process depicted in call flow 400 can be adapted to other features and/or other systems. According to an example, SIP subscriptions can be made according to the following. Start SIP and VoIP QoS applications. Based on interaction with the lower layers of AT, the SIP/VoIP application knows if the currently associated AN supports VoIP. In addition, if a given ® AN configures an AT by MPA and/or EMPA, the AN is considered to be aware of QoS. If the AN does not support VoIP, the AT bypasses the remainder of the call flow 400 and registers with the electrical switched network. VoIP applications configure real-time protocol (RTP) QoS. Once the RTP configuration is complete, the VoIP application triggers the SIP application to perform IMS registration. The SIP application obtains the address of the P-CSCF (eg, SIP server) and configures and/or initiates QoS for the SIP stream. When SIP QoS is configured and started, the AT continues to register with the IMS. If the SIP application expires and does not receive a response, the SIP application attempts to arrive at 135236.doc • 21 201014299 Ρ-CSCF. Once the IMS is successful, the address of the P-CSCF can be changed in the SIP QoS configuration if necessary. SIP subscriptions are kept open. Returning to call flow 400, an alternative method is described. Initially, at 401, the AT is turned on for the first time. At 402, the AT performs call negotiation, and the AN provides a list of Quality of Service (QoS) profiles that the AN can process as parameter negotiation for Multi-Stream Packet Application (MPA)/Enhanced Multi-Stream Packet Application (EMPA) Part of it. Additionally, 402 can include access authentication (e.g., authentication of access terminal 4). At 403, if the PPP call has not been established, the SIP application triggers the initiation of the PPP call. At 404, the VoIP application requests configuration of the RTP stream for the first call. The AN configures the radio protocol by the appropriate parameters required to carry the RTP stream. At 405, the AN performs an All call to establish an A10 interface connection. At 406, a configuration traffic flow template (TFT) filter and channel processing information is communicated via the RSVP message at the PDSN. After 406, the RTP flow is successfully configured and the subscription remains in the off state. Notify the successful RTP QoS flow configuration to the VoIP application. ® At 407, the SIP application determines the P-CSCF (eg, SIP server)

A list of addresses. At 408, the SIP application requests configuration of the SIP QoS .flow. The AT negotiates with the AN to configure the radio protocol required to carry the SIP stream. this

In addition, the PDSN is also configured by the necessary TFT filters. At 409, an A10 connection is established between the AN and the PDSN. At 410, the AT performs RSVP messaging to set up a filter at the PDSN. Configure the TFT filter and channel processing information at the PDSN. The filter used for the SIP stream is the source address of the Ρ-CSCF and the destination address of the AT. The Ρ-CSCF address utilized is the address from the list of P-CSCF 135236.doc • 22- 201014299 addresses. At 411, after successfully configuring the radio Q〇S stream and the PDSN filter, the AT requests the AN to turn the subscription to the on state. At 412, the AN notifies the PDSN that the SIP QoS flow has started. According to an example, the QoS for the RTP stream can be configured/prepared (CONFIGURED/READY) and the QoS for the SIP stream is configured/prepared/authorized (CONFIGURED/READY/GRANTED). According to one illustration, CONFIGURED implies that the appropriate network request QoS has been provided to provide the required QoS metrics. Ready • (READY) indicates that the network has responded and is providing the QoS configuration to the AT.

The QoS configuration may include parameters that are specified for different protocol layers (eg, RLP, MAC, etc.). Authorized (GRANTED) implies that the QoS flow has been connected to the resources required for the QoS flow operation assigned to the AT. At 413, the application requests execution of an echo check message to a point identified in the P-CSCF list (e.g., a SIP server). During the P-CSCF discovery, the AT can obtain multiple addresses without knowing which of the list is reachable. In addition, the AT can only access one of the P-CSCF entries in the list. The echo check message makes it possible to avoid unnecessary delays caused by the application due to direct attempts to discover reachability via the IMS registration process as described above. The echo check message improves the performance of the AT in a fast association with the correct P-CSCF (e.g., the application registration attempt may take approximately thirty seconds before determining reachability) to enable rapid utilization of the service. According to one aspect, echo check messages to all P-CSCF entries can be performed in parallel. In addition, the AT can find the nearest P-CSCF based on the measured round trip time. Echo check messages can be sent multiple times to increase the measurement. 135236.doc •23· 201014299

Reliability and provides the application with minimum round trip time, average round trip time, and/or maximum round trip time. The round trip time measurement procedure helps optimize the delays encountered in SIP signaling and provides immediate impact in establishing SIP calls. The application can be notified of the P-CSCF items available in the list and the associated round trip time. The program can start the registration process to the reachable p_CSCF item from the item with the minimum round trip time. If the user initiates the call during this process, the AT can switch to the lx system and the AT can be called. The process is executed again at the end. The echo check message enabling service can be quickly returned to the data optimization. At 414, if the Q〇s configuration for the SIP stream is successful, the IMS registration begins. Support SMS, l, JIMS registration on lxEV-DO can occur on the preset stream. AT selects the address from the list of p_csCF determined during the discovery process. If the IMS registration expires, try to access other P- from the list. The CSCF entry is IMS registered. The AT initiates a timer to wait for a response from the P_CSCF. The AT may encounter problems in the case of IMS registration. For example, 'the AT may only be allowed to register with a particular P-CSCF entry. If the registration of the server fails, the AT can still retry the registration in the other reachable p_CSCF. If the IMS registration for the selected P-CSCF fails at 414, then steps 415 and 416 occur. At 415, the AT is P-CSCF list selection One and repeat steps 413 and 414. At 416, the TFT filter needs to be changed to support the new P-CSCF address (e.g., the address to which the P-CSCF is ultimately connected). The AT QoS modification procedure performs filter settings. The change while maintaining the initial QoS configuration for the radio portion. 135236.doc •24· 201014299 _It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of a non-steep method. It should be understood that The specific order or hierarchy of steps in the process of re-configuring the present invention while retaining the method of the present disclosure is intended to present the elements of the various steps in the sample order and is not intended to be limited to the particulars presented. Order or hierarchy. Referring to Figures 5-6, a method for determining the reachability of a P_CSCF using an echo check message prior to starting the registration procedure is illustrated. Although the method is shown and described as a series of actions for the sake of simplicity of the description, It is to be understood and appreciated that some of the acts may be performed in an order different from the order shown and described herein and/or in accordance with one or more embodiments. The actions occur at the same time, so the methods are not limited by the order of the actions. For example, those skilled in the art should understand and appreciate that a method can alternatively be represented, for example, as a series of related states or events in a state diagram. It may not be necessary for all of the illustrated acts to implement a method in accordance with one or more embodiments. Turning to Figure 5, a method for facilitating selection of a reachable server prior to initiating a registration procedure using a call initiation protocol is illustrated. In one example, method 500 can be used by a mobile device to establish a multimedia communication call with an IMS to enable a multimedia service. At reference numeral 502, a plurality of Proxy Call Control Functions (P-CSCF) are found. » The P-CSCF can be a SIP server. At reference numeral 504, an echo check is performed for each P_CSCF server (e.g., an echo check message is transmitted to the server) to determine reachability. The echo check message seeks a return response to cause the reachable server to send a response to the echo check message. At reference numeral 506, the round trip time associated with the echo check message for which the response was received is measured. The registration procedure is initiated at reference numeral 135236.doc • 25· 201014299 numeral 508 to at least one reachable p_CSCF. According to a description, the reachable P-CSCF start registration procedure associated with the fastest measured round trip time can be used. Referring now to Figure 6, a method for facilitating the selection of a reachable server prior to initiating an IMs registration procedure using a call initiation protocol is illustrated. In an example, the method 600 can be used by a mobile device to establish a multimedia communication call with the IMS. The multimedia service "at reference numeral 6〇2" obtains a list including a plurality of P-CSCF items. At reference numeral 6〇4, each p cscF and the echo check message are transmitted in parallel. At reference numeral 6〇6, the round trip time associated with the received echo check message response is measured. At reference numeral 608, a determination is made as to whether sufficient measurements have been collected. For example, δ, the setting may indicate that N measurements are made, where N is an integer greater than or equal to one. If additional measurements are required, Method 6 〇〇 returns the reference number 6〇4 to issue another round of echo check messages and obtain the additional time amount side. If sufficient measurements have been collected, the method 600 continues to reference numeral 61, where the collected round trip time is gathered at reference numeral _ 6H). For example, the collected measurements can be averaged. In addition, the minimum, maximum, intermediate, or any other statistical measure can be evaluated based on the collected measurements. At reference number 612, the registration procedure is initiated to the best reachable p_CSCF. The U-CSCF can be reached to return a CSCF that responds to an echo check message. For example, the best p_CSCF may be the =csCF with the lowest aggregate round trip time. At reference numeral 614, a determination is made as to whether the registration was successful, and the method 600 ends. If not, then method 6 continues to reference numeral 616' at reference numeral 616, beginning to register with the subsequently reachable 135236.doc •26·201014299 feeder (right). Very profitable } ^ If the right unreachable server is available, the call setup fails. Method _ can be iterated via reference numerals 614 and 616 until registration is successful. It should be appreciated that, in accordance with one or more aspects described herein, inferences can be made regarding the selection of the round trip time associated with the echo check message, the selection of the SIP server for registration, the determination of reachability, and the like. . As used herein, the term W"inference" generally refers to the process of reasoning or inferring the state of the system environment &/or user based on observations of events and/or data captures. For example, inference can be used to identify a particular context or action, or to generate a probability distribution over the state. The inference can be probabilistic—that is, based on considerations of data and events, calculate the probability distribution over the state of interest. Inference can also refer to techniques used to form higher-level events based on a set of events and/or materials. Regardless of whether the events are closely related in time, and regardless of whether the events and information are from an event and source of information or a number of events and sources of information, the inference constructs a new event based on a set of observed events and/or stored event data. Or action. Figure 7 is an illustration of a mobile device 7 that facilitates communication associated with a mobile device in a wireless communication system in accordance with aspects of the disclosed invention. It should be appreciated that the mobile device 700 can be the same or similar to the mobile device 116, 200 or 322, such as described herein with respect to system 1, system 200, system 300, method 500, and method 600, respectively. Or may include the same or similar functionality as the mobile device 116, 200 or 302. Mobile device 700 can include a receiver 702 that receives signals from, for example, a receiving antenna (not shown) and performs a typical 135236.doc -27-201014299 action on the received signal (eg, filtering, amplifying' Down-converting, etc.) and digitizing the conditioned signal to obtain a sample. Receiver 〇2 can be, for example, an MMSE receiver, and can include demodulation transformers 7〇4 that can demodulate the received symbols and provide them to processor 706 for channel estimation. Processor 706 can be a processor dedicated to analyzing information received by receiver 702 and/or generating information for transmission by transmitter 708, a processor that controls one or more components of mobile device 700, and/or both A processor that is received by the receiver 702, generates information for transmission by the transmitter 708, and controls one or more components of the mobile device 700. The mobile device 700 can also include a modulator 710 that can cooperate with the transmitter 708 to facilitate transmission of signals (eg, data) to, for example, a base station (eg, 102), another mobile device (for example, 122) and so on. In one aspect, processor 706 can be coupled to SIP application 316, which requires an ip connection to a multimedia service provided by IMS (eg, a multimedia communication call is in another aspect, processor 706 can be coupled The SIP module 318 facilitates the establishment of a multimedia communication call that can be used by the SIP application 316. The SIP module 318 can obtain a proxy server that provides an interface between the mobile device 700 and the IP Multimedia Subsystem. (For example, the P-CSCF server) list. The processor 〇6 can also be coupled to the echo check module 322, and the echo check module 322 can transmit the echo check message to the list obtained by the sip module 3 1 8 . Each of the proxy servers determines which of the servers are reachable by the checklist. The echo check module 322 can measure the round trip time based on the timestamp of the transmission of the echo check message and the timestamp associated with the return response. In another aspect, the processor 〇6 can be further coupled to the server 135236.doc • 28· 201014299 server selection module 326, and the server selection module 326 can select an agent from a group of reachable servers. After the selection, the SIP module 3 18 can initiate SIP registration with the selected proxy server to enable the establishment of a multimedia communication call for the SIP application 316. The mobile device 700 can additionally include a memory 712, which The memory 712 is operatively coupled to the processor 706 and can store data to be transmitted, information received, information related to available channels, data associated with the analyzed signal and/or interference* strength, and assigned Information about the channel, power, rate, or the like, and any other suitable information for estimating the channel and communicating via the channel. The memory 712 can additionally store and estimate and/or utilize the channel (e.g., based on performance, Based on capacity, etc.) associated protocols and/or algorithms.

It should be understood that the data store (e.g., memory 712) described herein can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memory. By way of illustration and not limitation, non-volatile memory may include read only memory (ROM), programmable ROM stomach (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), or flash. Memory. Volatile memory can include random access memory (RAM) that acts as external cache memory. By way of illustration and not limitation, RAM can be used in many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronization. Link DRAM (SLDRAM) and direct Rambus RAM (DRRAM). The memory 712 of the system and method of the present invention is intended to comprise, without limitation, any other suitable type of memory, such as any of the 135236.doc -29-201014299. It should be appreciated and understood that SIP application 316, SIP module 318, echo check message 322, and/or server selection module 326 can each be the same as the respective components of components such as those described herein more fully with respect to system 300. Or similar, and/or may include the same or similar functionality as the individual components of components such as those described herein more fully with respect to system 3. It should be further understood and understood that SIP application 316, SIP module 318, echo check module 322, server selection module 326, and memory port 712 may each be a separate unit (as depicted), and may include Within processor 〇6, it may be incorporated into another component' and/or any suitable combination thereof. 8 is an illustration of a system 8 that facilitates communication associated with a mobile device in a wireless communication system in accordance with aspects of the disclosed invention. System 8A includes a base station 802 (e.g., an access point, ...) having a receiver 81A that receives signals from one or more mobile devices 8.4 via a plurality of receive antennas 806, and via transmit antenna 808 Transmitted to the transmitter 820 of the one or more mobile devices 8〇4. Receiver 810 can receive information from receive antenna 806 and is associated with demodulation 812 operation of the information received by the demodulation transformer. The demodulated symbols are analyzed by a processor 814, which may be a processor dedicated to analyzing information received by the receiver 810, generating information for transmission by the transmitter 82, and one of the control base stations 802. The processor of the plurality of components' and/or simultaneously analyzes information received by the receiver 810, generates a processor for transmitting information by the transmitter 820, and controls one or more components of the base station 8〇2. Further, the processor 814 can be similar to the processor described above with respect to FIG. 7 and coupled to the memory 816, which stores and estimates 135236.doc -30· 201014299 (eg, pilot) Information relating to strength and/or intensity of interference, information to be transmitted to mobile device 804 (or disparate base station (not shown)) or received from mobile device 8〇4 (or disparate base station (not shown)) And/or any other suitable information related to performing the various actions and functions set forth herein. In addition, the suffix 816 can store data to be transmitted, information received, information related to available channels, data associated with the analyzed signal and/or interference strength, and assigned channel, power, rate Information relating to analogs thereof, and any other suitable information used to estimate the channel and communicated via the channel, memory 816 may additionally be stored in association with estimating and/or utilizing channels (eg, based on performance, capacity based, etc.) Agreement and / or algorithm. Base station 802 can also include a modulator 818 that can cooperate with transmitter 820 to facilitate the transmission of signals (e.g., data) to, for example, mobile device 804, another device, and the like. Further, although depicted as being separate from processor 814, it should be appreciated that demodulator 812 and/or modulator 818 can be part of processor 814 or a plurality of processors (not shown). It should be understood that the memory 816 described herein may be a volatile memory or a non-volatile memory, or may include both volatile memory and non-volatile memory. The memory may include a read only memory (ROM), a programmable rom (PROM), an electrically programmable ROM (EPROM), an electrically erasable pR〇M (EEPROM), or a flash memory. Volatile memory can include random access § memory (RAM) that acts as external cache memory. By way of illustration and not limitation, RAIvl can be used in many forms such as Synchronous RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Dual Data Rate SDRAM (DDR SDRAM), 135236.doc 31 201014299 Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM) and Direct Rambus RAM (DRRAM). The memory 816 of the system and method of the present invention is intended to comprise, without being limited to, such and any other suitable type of memory.圊9 shows an example wireless communication system 900. For the sake of brevity, the wireless communication system 900 depicts a base station 910 and a mobile device 950. However, the 'should understand' system 900 can include more than one base station and/or more than one mobile device, wherein the additional base stations and/or mobile devices can be substantially similar or different from the example base station 91 described below. 〇 and mobile devices ❿ 950. In addition, it should be understood that base station 910 and/or mobile device 950 can use the systems described herein (Figs. 1 - 3 and 7 - 8), call flows (Fig. 4), and/or methods (Fig. 5- Figure 6) to facilitate wireless communication between the base station 91A and the mobile device 950. The traffic data for the plurality of data streams at the base station 910 is provided from the data source 912 to the transport (TX) data processor 914. According to an example, each data stream can be transmitted on a respective antenna. The data processor 914 formats, codes, and interleaves the traffic data stream based on a particular encoding mechanism selected for use in the traffic data stream. Provide encoded information. The Orthogonal Frequency Division Multiplexing (〇FDM) technique can be used to multiplex the encoded data and pilot data for each data stream. Additionally or alternatively, pilot symbol division multiplexing (FDM), time division multiplexing (tdm), or code division multiplexing (CDM) pilot data may be generally known data patterns that are processed in a known manner and may be At the singing device 950 is used to estimate the channel response. Can be based on a particular modulation mechanism selected for each data stream (eg, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), Μ Phase Shift Keying (M-PSK), 135 135236.doc -32- 201014299 Quadrature Amplitude Modulation (M-QAM), etc. to modulate (eg, symbol map) the multiplexed pilot and encoded data for its data stream to provide modulation symbols. The data rate, encoding, and modulation for each data stream can be determined by instructions executed or provided by processor 930. The modulation symbols for the data stream can be provided to the processor 920, which can further process the modulation symbols (e.g., for OFDM). The processor 920 then provides a modulator « stream to the transmitters (TMTR) 922a through 922t. In various embodiments, the ΜΙΜΟ processor 920 applies beamforming weights to the symbols of the data stream and to the antenna from which the symbols are transmitted. Each transmitter 922 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a suitable transmission on the chirp channel. The signal of modulation. In addition, the modulated signals from transmitters 922a through 922t are transmitted from antennas 924a through 924t, respectively. At mobile device 950, the transmitted modulated signals are received by antennas 952a through 952r and the received signals from each antenna 952 are provided to respective receivers (RCVR) 954a through 954r. Each receiver 954 conditions (eg, filters, amplifies, and downconverts) the respective signals, digitizes the conditioned signals to provide samples, and further processes the samples to provide corresponding "received" Symbol stream. The RX data processor 960 can receive the received symbol streams from the plurality of receivers 954 and process the symbol streams based on a particular receiver processing technique to provide iVV "detected " symbol streams. The RX data processor 960 can resolve 135236.doc • 33- 201014299 Modulate, deinterlace, and decode each detected symbol stream to recover the traffic data for the data stream. The processing by RX data processor 960 is complementary to that performed by processor 920 and TX data processor 914 at base station 91. As described above, the processor 970 can periodically determine which precoding matrix to utilize. Additionally, processor 970 can formulate a reverse link message comprising a matrix index portion and a rank value portion. < The reverse link message may contain various types of information about the communication link and/or the received data stream. The reverse link message may be processed by the data processor 938 (which also receives the traffic data from the data source 936 for many data streams), modulated by the modulator 980, and transmitted by the transmitters 954a through 954r. Adjusted and transmitted back to base station 910. At base station 910, the modulated signal from mobile device 950 is received by antenna 924, adjusted by receiver 922, demodulated by demodulation transformer 940, and processed by RX data processor 942. The reverse link message transmitted by the mobile device 95 is retrieved. Additionally, processor 930 can process the retrieved message to determine which precoding matrix to use for determining beamforming weights. - Processors 930 and 970 can direct (e.g., control, coordinate, manage, etc.) operations at base station 910 and mobile device 950, respectively. Individual processors 930 and 97 can be associated with memory 932 and 972 that store code and data. Processors 930 and 970 can also perform computations separately to derive frequency and impulse responses for the uplink and downlink. estimate. It should be understood that the embodiments described herein may be implemented in hardware, software, 135236.doc • 34· 201014299 Bo Li, intermediate soft it, microcode, or any combination thereof. For hardware embodiments, the processing unit can be implemented in one or more special application integrated circuits (ASICs), digital signal processors (DSp), digital signal processing devices (DSPDs), programmable logic devices (pLDs). A field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic unit designed to perform the functions described herein, or a combination thereof. Information transfer, token transfer, network transfer, etc. For a software embodiment, where the embodiment is implemented in a software, firmware, intermediate software or microcode or code segment, it can be stored in a machine readable medium such as a storage component. A code segment can represent a program, a function, a subroutine, a program 'f-type routine, a module, a package, a file, or any combination of instructions, data structures, or program descriptions." By transmitting and/or receiving information, One code segment is coupled to another code segment or hardware circuit by data, arguments, parameters or memory contents. Information, arguments, parameters, data, etc. may be transmitted, transmitted or transmitted in any suitable manner, including the modules that share the functions described by Zhao, such as Zhao Sheng, ^ a μ , i., the techniques described in this article can be used to execute this

-------- and called war w four bones inspection news insurance information to determine 1000 can understand, the system

135236.doc -35· 201014299 1000 is shown to include functional blocks, which may be functional blocks representing functions implemented by a processor, software, or combination thereof (e.g., firmware). System 1000 includes an electrical component logical grouping 1002 that can act in conjunction. For example, logical grouping 1 〇〇 2 may include electrical components 1 〇〇 4 for discovering a plurality of proxy servers. Additionally, logical grouping 2 may include an electrical component 1006 for transmitting an echo check message to each of the discovered proxy servers. In addition, logical groupings 1〇〇2 may include electrical components for measuring the round trip time associated with each of the checkbacks. In addition, logical grouping 1002 can include an electrical component 1 〇 〇 for initiating a registration procedure to at least one of the discovered proxy feeders. Additionally, system 1A may include sS*Yi Zhao 1 〇12 that maintains a sum of functions for performing functions associated with electrical components 1〇〇4, 1〇〇6, 1〇〇8, and 1〇1〇 » Although shown external to memory 1012, it should be understood that one or more of electrical components 1〇〇4, 1〇〇6, 1〇〇8, and 丨〇1〇 may be present within memory 1012. Figure 11 illustrates a system for determining the registration of a call initiation agreement. For example, system 1100 can reside at least partially within a base station, mobile device, or the like. It will be appreciated that system 1100 is represented as including functional blocks, which can be functional blocks representing functions implemented by a processor, software, or combination thereof (e.g., tough). System i i 00 includes an electrical component logical grouping 1102 that can act in conjunction. For example, logical grouping 11 〇 2 may include electrical components 11 〇 4 for receiving at least an echo check message from the (four) device. Additionally, logical grouping 1102 can include an electrical component 丨ι6 for transmitting a return message to the mobile device in response to the at least one echo check message. In addition, logical grouping H02 may include a gas component 1108 for initiating registration with the mobile device. For example, registering with the mobile device can be based, at least in part, on the round trip time required to transmit and receive the at least one echo check message and return the message. In addition, the system 11 can include a memory 丨Π 0 that maintains instructions for performing functions associated with the electrical components 1104, 1106, and 1108. Although shown external to memory 1110, it should be understood that one or more of electrical components 1104, 116, and 1108 may be present in memory 111. 0. The above description includes one or more implementations. An example of an example. Of course, it is not possible to describe every possible combination of components or methods for the purpose of describing the above embodiments, but it will be appreciated by those skilled in the art that many other combinations and permutations of the various embodiments are possible. Accordingly, the described embodiments are intended to cover all such changes, modifications and variations in the spirit and scope of the invention. Moreover, to the extent that the term "includes" is used in the context of an embodiment or patent application, the term is intended to be used in the context of a patent similar to "include" in "include" In the middle of the interpretation of the way to be sexual. ® [@朗单说明] Figure 1 is a description of a wireless communication system in accordance with various aspects set forth herein. 2 is an illustration of an example communication device for use within a wireless communication environment. 3 is an illustration of an example wireless communication system that facilitates determining the reachability of a proxy server prior to initiating a registration procedure. FIG. 4 is a description of a private call server selected according to the aspect of the present disclosure and registered to the server 135236.doc -37· 201014299. Figure 5 is an illustration of an example method of facilitating the selection of a reachable server prior to initiating an IMS registration procedure using a call initiation protocol. 6 is an illustration of an example method of facilitating selection of an reachable server prior to initiating an IMS registration procedure using a call initiation protocol. • Figure 7 is an illustration of an example system that facilitates communication associated with a mobile device in a wireless communication system in accordance with aspects of the disclosed invention. 8 is an illustration of an example system that facilitates communication associated with a mobile device in a wireless communication system, in accordance with aspects of the disclosed invention. 9 is an illustration of an example wireless network environment that can be used in conjunction with the various systems and methods described herein. FIG. 10 is an illustration of an example system for determining the reachability of a p-csCF via an echo check message during SIP registration. Figure 11 is an illustration of an example system that facilitates the registration of a call initial agreement. [Main component symbol description] 100 Wireless communication system 102 Base station 104 Antenna 106 Antenna 108 Antenna 110 Antenna 112 Antenna 114 Antenna 116 Mobile device 135236.doc -38- 201014299 118 Forward link 120 Reverse link 122 Mobile device 124 Front Keyway 126 Reverse Link 200 Communication Device/System 202 Call Initial Protocol (SIP) Module 204 Echo Check Module ❹ 206 Server Selection Module 300 Wireless Communication System 302 Access Terminal 304 Base Station 306 Access Network Road 308 Packet Data Servo Node (PDSN) 310 P-CSCF Server 312 A8/A9 Controller _ 314 A10/A11 Controller 316 SIP Application 318 SIP Module 320 Discovery Module 322 Echo Check Module 324 Round Trip Evaluator 326 Server Selection Module 400 Call Flow 135236.doc -39- 201014299 700 Mobile Device 702 Receiver 704 Demodulation Transformer 706 Processor 708 Transmitter 710 Modulator 712 Memory 800 System φ 802 Base Station 804 Mobile Device 806 Receive antenna 808 transmit antenna 810 receiver 812 demodulator 814 processor 816 memory m 818 Modulator 820 Transmitter 900 Wireless Communication System 910 Base Station 912 Data Source 914 Transport (TX) Data Processor 920 ΤΧ ΜΙΜΟ Processor 922 Transmitter (TMTR) / Receiver (RCVR) 135236.doc -40- 201014299 922a to 922t 924a to 924t 930 932 936 938 940 942 φ 950 952a to 952r 954

954a to 954r 960 970 972 980 1000 1002 1004 1006 1008 1010 Transmitter (TMTR) / Receiver (RCVR) Antenna Processor Memory Source TX Data Processor Demodulation RX Data Processor Mobile Device Antenna Receiver (RCVR) ) / Transmitter (TMTR) Receiver (RCVR) / Transmitter (TMTR) RX Data Processor Processor Memory Modulator System Electrical Component Logical Grouping Used to discover the electrical components of a plurality of proxy servers for echo checking The electrical component of the electrical component transmitted to each of the discovered proxy servers for measuring the round trip time associated with each echo check message is used to initiate to at least one of the discovered proxy servers 135236.doc. 41 - 201014299 Registration of electrical components 1012 Memory 1100 System 11 〇 2 Electrical components logical grouping 1104 1106 1108 1110

An electrical component for receiving at least an echo check message from the mobile device for transmitting a return message to the electrical component of the mobile device in response to the at least one echo check message I: an electrical component registered with the mobile device

135236.doc •42·

Claims (1)

201014299 X. Patent application scope: 1. A method for registering a call initial agreement, comprising: discovering a plurality of proxy servers; transmitting a checkback message to each discovered proxy server, wherein the echo check message Soliciting a return response; measuring a round trip time associated with each echo check message; and initiating a search for at least one of the discovered proxy servers based on the measured round trip time Registration process. ❼ [4] The method of claim 1 wherein the plurality of proxy feeders are found to include a list comprising the plurality of proxy servers. 3. The method of claim 1, wherein the transmission of the echo check message to each of the discovered proxy servers occurs in parallel. 4. The method of claim 1, further comprising issuing an echo check message multiple times to collect a plurality of measurements for each of the discovered proxy servers. 5. The method of claim 4, further comprising determining at least one of an average round trip time, a minimum round trip time, a maximum return travel time, or an intermediate round trip time based on the plurality of measurements. The method of claim 1, further comprising detecting a return response associated with each echo check message to ascertain the discovered proxy server that is reachable. The method of monthly solution 6 further includes arranging the reachable proxy servers based on the measured round trip time. 8. The method of claim 7, wherein initiating the registration process comprises starting with a proxy server associated with the minimum round trip time, starting with 135236.doc 201014299 registration of each reachable proxy server until Establish a connection. ~ 9. The method of claim 1, further comprising selecting from the agents found in the server - corresponding to - the minimum round trip time of the proxy feeder. 10. The method of claim 1, further comprising registering a registration procedure with a first server responsive to the echo check message. 11. The method of claim 10, further comprising maintaining a response to an echo check message received by a server different from the first ® server. 12. The method of claim U, further comprising attempting to register with a second feeder that responds to the echo check message when a registration failure to the first server occurs. An overnight B device for call initial agreement registration, the communication device comprising: means for discovering a plurality of proxy servers; 构件 means for transmitting an echo check message to each of the discovered proxy servers Wherein the echo check message solicits a return response; means for measuring a round trip time associated with each echo check message; and for initiating a call to the station based on the measured round trip time A component of a registration procedure for at least one of the discovered proxy servers. 14. A wireless communication device, comprising: a §2* memory, which maintains instructions for: discovering a plurality of proxy servers; transmitting an echo check message to each discovered generation 135236.doc • 2 - 201014299 The server, wherein the echo check message solicits - returns a response; measures the round trip time associated with each θ check message; and initiates the discovery based on the measured round trip time a registration procedure for at least one of the proxy servers; and - a processor coupled to the memory configured to execute the instructions retained in the memory. 15. The wireless communication device of claim 14, wherein the memory is further maintained for obtaining an instruction including a list of the plurality of proxy servers. The wireless communication device of claim 14 wherein the transmission of the echo check message to each of the discovered proxy servers occurs in parallel. 17. The wireless communication device of claim 14, wherein the memory further maintains an echo check message for multiple times to collect a plurality of measurements for each of the discovered proxy servers. 18. The wireless communication device of claim 17, wherein the memory is further configured to determine at least one of an average round trip time minimum round trip time, a maximum round trip time, or an intermediate round trip time based on the plurality of measurements Instructions. 19. The wireless communication device of claim 14, wherein the memory further maintains an instruction to detect a return response associated with each echo check message to ascertain the reachable discovered proxy server. 20. The wireless communication device of claim 19, wherein the memory further maintains instructions for arranging the reachable proxy servos based on the measured round trip time. 21. The wireless communication device of claim 20, wherein the memory further maintains 135236.doc 201014299 for starting from a proxy server associated with a minimum round trip time, starting with each reachable proxy server. Register until the instruction to establish a connection. 22. The wireless communication device of claim 14, wherein the memory further maintains instructions for selecting a proxy server corresponding to a minimum round trip time from the discovered proxy servers. 23. The wireless communication device of claim 14, wherein the memory further maintains an instruction to initiate a registration procedure to a first server responsive to the echo check message. 24. The wireless communication device of claim 23, wherein the memory further maintains an instruction to maintain a response to an echo check message received from a server other than the first server. 25. The wireless communication device of claim 24, wherein the memory further maintains an instruction to attempt to register with a second server responsive to the echo check message when a registration failure to the first server occurs . 26. A computer program product comprising: m a computer readable medium, comprising: code for causing a computer to discover a plurality of proxy servers; for causing the computer to transmit an echo check message to each The code of the discovered proxy server, wherein the echo check message solicits a return response; a code for causing the computer to measure a round trip time associated with each echo check message; and for causing the The computer is based on the measured round trip time as ^ 135236.doc •4 - 201014299 The at least one of the founder's founder-registered program code 27. A seed-processor in-(four) communication system configured to: discover a plurality of proxy servers; transmit an echo check message to each of the discovered proxy feeders, wherein the θ check message request - returning a response; measuring a round trip time associated with each echo check message; and initiating registration of at least one of the discovered proxy feeders based on the measured round trip time program. 28. A method for registration of a call initial protocol for a mobile device, comprising: receiving at least one echo check message from a mobile device; transmitting a return message to the mobile device in response to the at least one echo check message And to part J initiates registration with the mobile device based on a round trip time required to transmit and receive the at least one echo check message and the return message. 29. The method of claim 28, further comprising registering with at least one server comprising a list of proxy servers. 30. The method of claim 29, wherein registering with the at least one server adds an entry to the server list. 31. A communication device for registration of a call initial agreement, comprising: 135236.doc 201014299 means for receiving at least one echo check message from a -<=.φ, m.λ 仃 device; for responding Sending a return message to the component of the mobile device for the at least one echo check message; and for a round trip time required to transmit and receive the at least one echo check message and the return message The component that initiates registration with the mobile device. 32. A wireless communication device, comprising: a memory that maintains an instruction to: receive at least one echo check message from a mobile device, and return a message in response to the at least one echo check message Transmitting to the mobile device and initiating registration to the mobile device and processing coupled to the memory based at least in part on a round trip time required to transmit and receive the at least one echo check message and the return message And configured to execute the instructions held in the memory. 33. The wireless communication device of claim 32, wherein the memory further maintains an instruction to register with at least one of the server including a list of proxy servers. 34. The wireless communication device of claim 33, wherein an entry is added to the server list to the at least one server. 35. A computer program product, comprising: a computer readable medium, comprising: a code for causing a computer to receive at least one echo check message from a mobile device; 135236.doc -6 - 201014299 for causing The computer transmits a return message to the mobile device in response to the at least-echo check message; and is configured to cause the computer to be based at least in part on transmitting and receiving the at least one echo check message and the return message The code for the registration of the mobile device to start the round trip time. 36. A device for use in a wireless communication system, comprising: a processor configured to: receive at least one echo check message from a mobile device; Transmitting a return message to the mobile device in response to the at least one echo check message; and an echo check message and initiating a round trip to the mobile device based at least in part on transmitting and receiving the at least the return message Registration of travel time pieces. 135236.doc 7-