WO2012015310A1

WO2012015310A1 - Method for transferring a collaboration session

Info

Publication number: WO2012015310A1
Application number: PCT/NO2011/000198
Authority: WO
Inventors: Ivan Marius Kristiansen; Gaute Hovdal
Original assignee: Cisco Technology, Inc.
Priority date: 2010-07-26
Filing date: 2011-07-11
Publication date: 2012-02-02
Also published as: US9661037B2; NO20101063A1; US20120023167A1; US20140217167A1; NO332222B1; US8738699B2; EP2599291A4; CN103053150B; EP2599291A1; EP2599291B1; CN103053150A

Abstract

A method for transferring a collaboration session from a handheld device to a multimedia endpoint by encoding session data for the collaboration session and/or instructions into an optically machine-readable representation of data, displaying the data on a display of the handheld device, and optically providing the data to a multimedia endpoint the collaboration session is to be transferred to. The multimedia endpoint may send a message to a server upon detecting the data, causing the server to transfer the collaboration session, based on the session data in the message. Alternatively, the multimedia endpoint establishes a session with another multimedia endpoint based on the instructions and/or session data.

Description

METHOD FOR TRANSFERRING A COLLABORATION SESSION

TECHNICAL FIELD

The present invention relates to transferring a collaboration session from a handheld device to a multimedia endpoint. BACKGROUND

Conventional videoconferencing systems comprise a number of end-points communicating real-time video, audio and/or data (often referred to as duo video) streams over and between various networks such as WAN, LAN and circuit switched networks.

A number of videoconference systems residing at different sites may participate in the same conference, most often, through one or more MCU's (Multipoint Control Unit) performing i.a. switching and mixing functions to allow the audiovisual terminals to intercommunicate properly.

Video conferencing systems presently provide communication between at least two locations for allowing a video conference among participants situated at each station. Conventionally, the video conferencing arrangements are provided with one or more cameras. The outputs of those cameras are transmitted along with audio signals to a corresponding plurality of displays at a second location such that the participants at the first location are perceived to be present or face-to-face with participants at the second location.

Video conferencing systems are becoming increasingly common, especially in the desktop space. Landline telephones are exchanged with desktop video conferencing systems which may operates both as IP phones and video conferencing systems.

Each Video conferencing system has a unique identifier (or address) which is used when someone wishes to call a certain video conferencing system. E.g. a Video conferencing system operating on H.320 (ISDN) may have a unique phone number, and a Video conferencing system operating on H.323 (IP) may have a unique Uniform Resource Identifier (URI) or IP-address. This allows a user and his/her video conferencing system to be associated with one unique identifier, much like traditional telephone systems and telephone numbers.

However, the unique identifier is associated with the video conferencing system, so the user is only reachable at the physical location of the video conference system.

In an office environment this causes limitations in accessibility since people often are on the move, e.g. attending meetings, workgroups, etc. A user may also have several equally important work locations such as the office, the lab, common creative workspace, etc. Each location may have a Video conference system. Hence, since each video conference system has its own unique identifier, and the caller usually does not know the physical location of the person he/she is trying to reach, the caller must either try to call all the locations he/she thinks the person may be or he/she must try to call back at a later stage.

Another problem with location-bound telecommunication equipment is the disturbance it may cause to immediate surroundings. Speech has been found to be the most annoying sound source in open plan offices, and the most distracting speech originates from the closest workstation. Since desktop video conferencing systems are more or less stationary devices, it is impossible to walk to a more private area to continue a call without first disconnecting the call and then reestablish the call at a different location.

Consequently, there is a need for a more seamless and transparent call system for video conferencing systems.

SUMMARY OF THE INVENTION

The invention provides a method, a collaboration server and a multimedia endpoint as set forth in the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the invention more readily understandable, the discussion that follows will refer to the accompanying drawings, wherein

Fig. 1 is a simplified block diagram illustrating the relevant elements of a

multimedia conferencing system,

Fig. 2 is a simplified block diagram illustrating the relevant elements of a

collaboration server (CS) operative according to an exemplary embodiment of the present invention,

Fig. 3 is a flowchart showing the relevant steps in an exemplary method of transferring a collaboration session,

Fig. 4 is a flowchart showing the relevant steps in an exemplary method of transferring a collaboration session,

Fig. 5 is a schematic view further illustrating the method for transferring a collaboration session.

DETAILED DESCRIPTION OF EMBODIMENTS In the following, the present invention will be discussed by describing various embodiments, and by referring to the accompanying drawings. However, people skilled in the art will realize other applications and modifications within the scope of the invention as defined in the enclosed independent claims.

FIG. 1 is a block diagram illustrating the topology of an exemplary audio and/or multimedia conferencing system 100 that may include: one or more collaboration servers (CS) 1 l Oa-c; a plurality of users 160a-c that use multimedia endpoints 166 and handheld wireless communication devices (HWCD) 163; one or more Switched Circuit Networks (SCNs) 130a-c; and one or more Internet Protocol (IP) Networks (IPNs) 120a-c. Each user 160a-c may have a multimedia endpoint (MMEP) capable of communicating over Switched Circuit Networks (SCNs) 130a-c via connection 142 or over Internet Protocol Networks (IPNs) 120a-c via connection 144. In addition, each user 160a-c may have a handheld wireless communication device (HWCD) 163 capable of communicating over Switched Circuit Networks (SCNs) 130a-c via connection 165, e.g. cellular networks such as GSM. System 100 may also comprise other multimedia endpoints (MMEP) 120 capable of communicating over a Switched Circuit Networks (SCNs) 130a-c via connection 148 or over Internet Protocol Networks (IPNs) 120a-c via connection 146, e.g. shared multimedia endpoints such as meeting room systems.

Hereafter, said handheld wireless communication device (HWCD) 163 will be referred to as handheld device 163.

Optionally, handheld device 163 may have a computing section (data section) that communicates with collaboration server 1 l Oa-c via a connection over IPN 120a-c. Optionally, computing section (data section) may communicate with collaboration server 1 lOa-c via a connection over a wireless network, such as 2G, 3G, 4G etc.

Data and commands communication between collaboration server 1 lOa-c and multimedia endpoints 166/120 may be accomplished via connections 1 18 and 146, or 1 18 and 144 respectively over Internet Protocol Networks 120a-c, or over 1 16 and 142 over SCN 130a-c. Although three units of each item are shown, there may be fewer or more than three of each item in an actual conferencing system. There is also no requirement that the number of each item be the same as the number of any other item.

Switched Circuit Networks 130a-c may be a PSTN, a ISDN, an ATM network, a cellular network or any combination thereof. Audio or multimedia endpoint 166 and 120 may provide speech only (e.g., analog telephone, cellular or IP phone), speech and data, speech and video, or speech, data and video communications or any combination thereof. System 100 may comprises one or more gateways 150a-c for facilitating

communication between MMEP 166 and HWCD 163 over connection 144 and 165 respectively, or between MMEP 120 and HWCD 163 over connection 146 and 165 respectively, or between MMEP 166 and HWCD 163 over connection 142 and 165 respectively (gateway not shown).

Real-time communication over Switched Circuit Networks (SCN) 130a-c may be based on International Telecommunication Union (ITU) standards such as H.320, H.321, and H.324. SCN 130a-c may comprise gateways (not shown in the drawings) for facilitating communication between different networks. Real-time

communication over Internet Protocol Networks (IPN) 120a-c may be based on ITU standards (e.g., H.323), or on Internet Engineering Task Force's Session Initiation Protocol (SIP) standard, which are incorporated herein by reference. Although not shown, IPN 120a-c may comprise gateways, gatekeepers, soft switches and other network devices. Moreover IPN 120a-c may include corporate intranet having routers, firewalls, etc. IPN 120a-c may run over physical networks such as those included in SCN 130a-c.

One or more of user's 160a-c uses a handheld device 163, such as a PDA, a cellular phone, a cellular PDA, or any other device of similar function and/or technical sophistication. Handheld device 163 at least comprises a display capable of reproducing text and images. Handheld device 163 may comprise a C and audio or audio/video section. Some handheld devices 163 may not include audio/video section. Optionally, computing section may be connected over a wireless network, such as 2G, 3G, 4G etc, or an Internet Protocol (IP) based network 120a-c, and may communicate over an Intranet or over the Internet with collaboration server 1 lOa-c over connection 125. The Connection 125 may be a common connection such as serial connection RS232, a wireless connection based on Bluetooth protocol, an Infra Red (IR) connection, an IP connection over a LAN or the Internet, or a cellular phone connection such as GSM network, 3G network etc. The physical connection of an IP connection 125 may run over connection 165 and SCN 130a-c toward the IP network 120a-c.

According to one embodiment of the invention, the computing section (among other tasks and applications) preferably runs a software program (or application) that can be used for displaying a barcode image (ID tag) on a display of the handheld device 163. Computing section may communicate over IPN 120a-c with an IP server such as collaboration server l l Oa-c.

According to another embodiment of the invention, the HWCD 150a-c may comprise short-range high frequency wireless communication technology which enables the exchange of data between devices over about a 10 centimeter distance, such as Near Field Communication (NFC). According to this embodiment, the multimedia endpoints 166 and 120 may also comprise similar communication technology, allowing the handheld devices 163a-c and the multimedia endpoints 166/120 to exchange data when they are brought within 0-10 centimeters of one another.

Collaboration Servers 1 1 Oa-c, among other tasks and applications, may run a software program that manages one or more data collaboration sessions with or without multimedia between one or more of user's 160a-c handheld devices 163 and/or multimedia endpoints 166, and or multimedia endpoints 120. Collaboration server 1 lOa-c may be installed, for example, in an Intranet of a corporation, or may be installed in a multimedia operator's premises. Collaboration server may constitute a portion of Video conferencing network device, such as a multipoint control unit, a Call control unit, a gateway, a gatekeeper, etc. A detailed description of collaboration server 1 1 Oa-c and its operation is disclosed below with respect to FIG. 2.

An exemplary embodiment of Collaboration server 1 10 is shown in FIG. 2.

Collaboration server 1 10 may comprise a session management module (SMM) 310, a Barcode management module (IDTMM) 320, a user database (UDB) 330 and a session database (SDB) 340.

Session management Module 310 communicates between the internal modules and/or databases 330/340 of collaboration server 1 10 and different destinations over one or more IP networks 120a-c (FIG. 1). Exemplary destinations include a plurality of handheld devices 163a-c (FIG. 1), a plurality Multimedia endpoint 166a-c and 120 (FIG. 1), one or more multipoint control units (not shown), etc. Session management module 310 is configured to at least establish, transfer and terminate two-party or multiparty sessions consisting of one or several media streams.

The session management Module may manage a user database 330 of user parameters for all users in a domain. The user parameters may comprise, but are not limited to, user ID (or user name), one or more endpoint addresses or dial-up numbers (multimedia endpoints, handheld devices, etc.), and optionally a list of prioritized endpoint addresses, etc, for each user. Optionally, the user parameters also comprise an image, more specifically the user parameters may also comprise an ID tag (or barcode image), e.g. a barcode such as a linear Barcode or a data Matrix code (2D barcode).

The session management Module 310 may manage an session database of session parameters for ongoing sessions and terminated sessions between two or more clients (or endpoints), such as multimedia endpoints, handheld devices, gateways, mcu, etc. The session parameters include, but are not limited to, a session ID, client (or endpoint) addresses (such as IP addresses, dial-up numbers, etc), and

communication standards (H.320, H.324, SIP, H.323, etc.) of each session.

A session request (or session invite) from a multimedia endpoint, addressed to a domain controlled by the CS 1 10, is routed to the CS 1 10 and handled by the session management module 310. If the session request is addressed to one or more users, e.g. the session request may be addressed to User2@company.com, the SMM 310 may retrieve endpoint address(es) associated with the one or more users from an appropriate user database 330, and forward the session request to the appropriate endpoint. If the session request is addressed to one or more endpoints, e.g. the session request may be addressed to User2.office@company.com, the SMM 310 forward the session request to the identified endpoint. The request is sent from a multimedia endpoint, e.g. a multimedia endpoint belonging to a Userl . The session request comprises at least the address of the multimedia endpoint of Userl e.g. Userl .office@company.com. Upon receiving the request, MSS 310 may then decide whether the request is for a point-to-point session, a gateway session, or a multipoint session based on the connection parameters of the users and the number of users in the list.

If the session request is addressed to one or more users, MMS 310 retrieves a multimedia endpoint address or dial-out number for an endpoint (e.g. MMEP 160/12, handheld device 163, etc) from the user parameters for each listed user in user database 330. E.g. User2 may, in the user database 330, have a Multimedia endpoint 166 with the address User2.office@company.com associated as the preferred endpoint to receive a collaboration session.

In one embodiment the user parameters of user database 330 only have one default endpoint address or dial-out number (such as a cellular telephone number) of a handheld device 163 associated for each user.

In another embodiment the user parameters of user database 330 may have several multimedia endpoint addresses and/or dial-out numbers (such as cellular telephone numbers) of the handheld devices 163 listed for each user. Further, MSS may optionally comprise a call logic module CLM (not shown). CLM allows a user to create a prioritized list of multimedia endpoint and handheld devices, and store said prioritized list as user parameters in the user database 330. In such a case, when CLM receives a session request (or invite) to a user, the session request is first routed to the one or more endpoint's (e.g. multimedia endpoints or handheld devices) being configured to have the highest priority. If the session is not accepted within a predefined time, the session is routed to the one or more endpoints (e.g. multimedia endpoints or handheld devices) having the second highest priority. This continues until the prioritized list is exhausted or the session is accepted or rejected. According to one embodiment, if it is determined that the session is a multipoint session, then MSS 330 would retrieve endpoint addresses (if not provided) from the user database 330, select an appropriate multipoint control unit (MCU) and send the parameters of the conference to that MCU. These parameters comprise the addresses and/or dial out numbers of endpoints for the listed users that the MCU is asked to establish a session with. Some of the dial-out numbers can be cellular telephone numbers of the handheld devices 153 that belongs to one or more users on the list.

If the requested session is a point-to-point session addressed to a second user, e.g.User2, from a first multimedia endpoint owned by a first user, e.g. Userl , MSS 310 may send a session request (or invite) to a second multimedia endpoint associated with the second user (e.g. User2) in the user database 330. If the second multimedia endpoint accepts the session, the MSS establishes a collaboration session between the first and second multimedia endpoint, and stores the session parameters in the session database 340.

The multimedia endpoints may comprise a Transfer Call function. Transfer call function may be activated by the user in various ways; by pushing a physical button on the multimedia endpoint, enter a code on a keypad, through a graphical user interface using a keypad or a touch screen, etc. When the Transfer call function is activated the multimedia endpoint sends a Transfer call command to the

Collaboration server 1 10 over a IP network 120a-c or a Switched circuit network 130a-c. One parameter of the Transfer call command is the address of the

multimedia endpoint sending the Transfer call command. Upon receiving a

Transfer call command, the SMM 310 is configured to transfers the session to another endpoint, based on parameters in the Transfer call command and/or parameters in the user database 330 and/or parameters in the session database.

According to one embodiment, upon receiving a transfer call command from an multimedia endpoint 166/120, the SMM is configured to transfer the session

(session ongoing with said multimedia endpoint 166/120) to a handheld device associated with the user (the user of the multimedia endpoint 166/120 sending the transfer call command) in the user database, based on parameters in the user database and/or parameters in the transfer call command and/or the session database. If the session is accepted by the handheld device, MSS 310 terminates communication to/from the multimedia endpoint and establishes a session with the handheld device. The session continues, uninterrupted, between the multimedia endpoint of User 1 and handheld device of User2.

In one embodiment the dial-out number of the target handheld device (the handheld device to which the session shall be transferred) is stored in said user parameters in the user database. In one embodiment the dial-out number of the target handheld device is a parameter of said Transfer call command.

According to another embodiment, if a user (e.g. User2 above) has given a handheld device top priority in the Call logic Module, the SMM 310 will establish a session, addressed to that user, to a handheld device directly.

When a session is established between a multimedia endpoint and a handheld device via the MSS 310, either by transfer or directly, the handheld device displays a unique ID tag.

The ID tag according to the present invention is an optical machine-readable representation of data. The ID tag can be read from a digital image by special software. The ID tag may be a barcode image; a linear or ID (1 dimensional) barcode or a 2D (2 dimensional) barcode (also referred to as matrix codes), such as QR code, Aztec code, barcode, High Capacity Color Barcode, PDF417, semacode, Shotcode, Microsoft tag, etc. The parameters encoded in the ID tag (or barcode image) may comprise, but is not limited to, the user name (or user ID) of the user of the handheld device, the session ID of the session the user of the handheld device is presently in, Endpoint instructions (instructions for the endpoint), etc

According one embodiment of the invention the CS 1 10 comprise an ID tag management module IDMM 320.

In one embodiment the IDMM 320 generates a unique ID tag (or barcode image) for each user in the user database and associatively stores said unique ID tag as a user parameter in the user database. On predefined events, the ID tag is distributed to the user's handheld devices. Such predefined event may comprise; on request, when a new user is added to the user database, on certain time intervals, etc. The ID tags may be distributed in the form of an electronic business card, such as vcard. The electronic business card comprises the ID tag and the address/dial-up number of a gateway 150a-c used for facilitating communication between MMEP 166/120 and HWCD 163. The handheld device may store the electronic business card

automatically in the address book (or contact list) of the handheld device.

Alternatively the handheld device prompts the user a choice to store the electronic business card or not. Most handheld devices for receiving phone calls (such as cell phones and smart phones) are factory configured to display an image associatively stored with a phone number in the address book, when the phone receives a call from that phone number. Hence, according to this embodiment, the handheld device displays a ID tag when the MSS routes a session to the handheld device. If more than one gateway is present in the network, the MSS may send one electronic business card for each gateway, or one electronic business card with one ID tag and several gateway dial-up numbers. Each electronic business card may comprise the same or different ID tags. The ID tags may be distributed to the handheld device using a standard or proprietary protocol over TCP/IP or 3G.

According to another embodiment, the IDMM is configured to generate and send an ID tag to the handheld device when a session request is sendt to that handheld device or when a session is accepted or when a session is established with that handheld device. The IDMM may send the ID tag as an attachment to a message, such as Multimedia Messaging Service (MMS), or an email, or a vcar, etc. The ID tags may be distributed to the applications on the handheld devices using a standard or proprietary protocol over TCP/IP or 3G.

According to yet another embodiment, the computing/data section of the handheld device may comprise a first software application. As with one of the previous embodiments the IDMM generates a unique ID tag for each user in the user database and associatively stores said unique ID tag as a user parameter in the user database. On predefined events, the ID tag is distributed to the user's handheld devices. Such predefined event may comprise; on request, when a new user is added to the user database, on certain time intervals, etc. The ID tags may be distributed to the applications on the handheld devices using a standard or proprietary protocol over TCP/IP or 3G. The application is configured to monitor incoming sessions (or calls), and display the ID tag if a session is established or session request is received from one of the gateways 150a-c used for facilitating communication between MMEP 166/120 and HWCD 163.

According to yet another embodiment of the invention, the computing/data section of the handheld device may comprise a second software application. The IDMM generates a software token for each user in the user database. On predefined events, the ID tag is distributed to the user's handheld devices. Such predefined event may comprise; on request, when a new user is added to the user database, on certain time intervals, etc. The software token is typically a configuration file unique for each user. The file may contain a username, a personal identification number, and a shared secret. The shared secret can be a password, a passphrase, a big number or an array of randomly chosen bytes. The application may generate an ID tag and display the generated ID tag when a call or session request is received from one of the gateways 150a-c. The ID tag at least comprises the shared secret.

According to the present invention, the multimedia endpoints 166/120 comprise an ID tag reader module (or barcode reader module) IDRM. The IDRM receives a video stream captured by the multimedia endpoints camera. The IDRM scans the images of the video stream for ID tags (or barcodes), and when an ID tag is detected, the IDRM decodes the ID tag and extracts the data stored in ID tag. The IDRM may comprise barcode reader software capable of reading at least one or more of the ID and/or 2D barcodes previously mentioned. Barcode reader software for ID and/or 2D barcodes is well known, and is not discussed in more detail herein. The IDRM is configured to receive instructions encoded in the ID tag, and send control instructions to the multimedia endpoint's 166/130 control unit, based on instructions in the ID tag.

According to one embodiment, upon decoding and validating that the ID tag (or barcode) comprised the correct data, the IDRM is configured to generate a barcode image detection message and send the barcode image detection message to the CS. The barcode image detection message may be distributed to the CS using a standard or proprietary protocol over a Switched Circuit Networks (SCNs) 130a-c or over Internet Protocol Networks (IPNs) 120a-c. The barcode image detection message comprises a set of control parameter. The control parameters may comprise, but are not limited to, the multimedia endpoint address (e.g. Endpoint URI or IP address or dial-up number) of the multimedia endpoint 166/120 where the ID tag (or barcode) was detected, user ID (stored in ID tag), and optionally Session ID (stored in ID tag).

According to one embodiment, the ID tag (or barcode) may comprise instructions. If the ID tag comprise an establish session instruction, the IDRM is configured to instruct the multimedia endpoint to establish a session with a multimedia endpoint identified in the session data retrieved from the ID tag. If the ID tag does not comprise a establish session instruction, the IDRM sends a barcode image detection message to the CS 1 10 as described above.

In one embodiment, the control parameters of the ID tag according to the present invention comprise an endpoint instruction. The endpoint instruction is an auto answer instruction, and in response to receiving the auto answer command the IDRM sends an instruction to a control unit of the multimedia endpoint 120/166 causing the multimedia endpoint to enable a one-time auto answer setting, if auto answer in not already enabled. Auto answer is a common configuration on multimedia endpoints. When auto answer is enabled, the multimedia endpoint automatically accepts session request so that a session (or call) can be established between the multimedia endpoint and the session initiator.

In another embodiment the CS is configured to, upon receiving a barcode image detection message from an endpoint, reply to the endpoint with an auto answer instruction instructing the endpoint to enable a one-time auto answer setting. The auto answer instruction may comprise a data string from the received barcode image detection message for security measures.

Upon receiving a barcode image detection message from an endpoint 166/120, the Session management module SMM 310 sends a session request to the multimedia endpoint identified in the barcode image detection message, based on parameters in the barcode image detection message and/or parameters in the session database. If the session is accepted by the multimedia endpoint, the connection to the handheld device is transferred to the multimedia endpoint multimedia endpoint identified in the barcode image detection message. Hence, the connection to the user's handheld device is terminated, and a session is established between the initiating multimedia endpoint and the multimedia endpoint identified in the barcode image detection message. The session initiator will not be disconnected and reconnected during this procedure, allowing for a seamless transfer between endpoints.

According to another exemplary embodiment, the ID tag comprises a establish session instruction. The establish session instruction comprises at least the address or dial-up number of the multimedia endpoint 166/120 that initiated the ongoing session with the handheld device. Upon, detecting and decoding the ID tag, the IDRM instructs the multimedia endpoint to send a session request to the multimedia endpoint identified in the establish session instruction. Optionally, the IDRM may further send an instruction to the CS instructing the CS to terminate the session between the first multimedia endpoint and the handheld device.

Fig. 3 is a schematic flow chart illustrating the principles of a method for transferring an ongoing session from one endpoint to another endpoint. More specifically the method is for transferring an ongoing session from a handheld device to a multimedia endpoint. The method according to the present invention is a more seamless and transparent method compared to known methods.

The method starts at the initiating step SO.

In step SI the CS receives a session request (or call request), from a first multimedia endpoint, addressed to a second user. For example, a first user (e.g. UserY) at EndpointY calls a second user (e.g. UserX) on an address

UserX@company.com.

The session request is routed to a handheld device 163 associated with the second user (UserX) in a user database 330. If the session request is accepted by the handheld device 163, a session is established between the first multimedia endpoint (EndpointY) and the handheld device 163 in Step S2. The session may be an audio only session, or the session may comprise audio and video, depending on the capabilities of the handheld device and the configuration of the CS 1 10. When a session is established, the CS 1 10 may optionally store a set of session parameters for the session in a session database 340. The session parameters may comprise, but are not limited to, session ID, address or dial-up numbers of the endpoints in the session, User ID (or user name) of the parties in the session, etc.

In one aspect of the invention, the session request is routed directly to the handheld device HX. In another aspect of the invention, the step S2 comprises a set of substeps, as shown in the flow diagram in figure 4. Upon receiving a session request (S I), the CS may route the session request to a third multimedia endpoint (e.g. EndpointX) associated with the second user in the user database. If the session request is accepted by the third multimedia endpoint, a session between the first multimedia endpoint (e.g. Endpoint Y) and the third multimedia endpoint (e.g. EndpointX) is established in step S21. CS may store a set of parameters for the session in the session database 340 as described above. When the session is established, the process proceeds to step S22, where an inquiry is made regarding whether a session transfer function on the third multimedia endpoint (e.g. EndpointX) is activated. The call transfer function may be activated by pressing a physical button on the multimedia endpoint, or a soft key/menu option in a graphical user interface for the endpoint. If the response to the inquiry is negative, the process returns to step S21. If the response to the inquiry in step S22 is affirmative, the process proceeds to step S23, where the third multimedia endpoint sends a transfer call command to the CS, at least identifying the address of the third multimedia endpoint and/or the User ID (user name) of the second user (user of the third multimedia endpoint). Upon receiving the transfer call command at the CS, the CS looks in the user database 330 if a handheld device is associated as a transfer-to-device as a user parameter for the identified user (e.g. UserX). If the identified user (e.g. UserX) does not have a transfer-to-device registered in the user database, the transfer command (or request) may be rejected, and the session continues on the third multimedia endpoint (e.g. EndpointX). Alternatively, if the identified user (e.g. UserX) does not have a transfer-to-device registered in the user database, the second user (e.g. UserX) is prompted on the third multimedia endpoint (e.g. EndpointX) to enter a dial-up number to which the second user (e.g. UserX) wishes to transfer the call. In the latter case, the dial-up number entered by the user is sent to the CS 1 10, and the CS 1 10 stores the dial-up number as a transfer-to- address in the user database 330 as a user parameter for the second user (e.g.

UserX). If the second user does have a transfer-to-device registered in the user database 330, or the second user enters a dial-up number on request as described above, the CS transfers the session from the third multimedia endpoint (e.g.

EndpointX) to the transfer-to-device (or handheld device) in step S24. Hence, a session is established between the first multimedia endpoint and the handheld device in step S2.

When the handheld device receives the session request, or when the session request is accepted by the handheld device, or the session is established with the handheld device, the handheld device displays an ID tag on the handheld device's display, in step S4.

In an aspect, the ID tag is automatically displayed on the handheld device.

According to one exemplary embodiment, the handheld device comprises one or more pre-stored contact or phone book entries. The pre-stored contact or phone book entries comprises at least one or more dial-up numbers (or addresses) of the one or more gateways used by the CS and an ID tag (or an image of the ID tag). Upon receiving a session request from the CS via one of the gateways, the handheld device displays the ID tag which is associatively stored with the phone number of the gateway in the contact list or phone book. This feature is a quite common feature on cell phones today. Alternatively, an application performing the function described above is running on the handheld device. The automatic display of the ID tag is advantageous since no action is required by the user. Hence, it is user friendly.

In another aspect, the handheld device requires input from the user in order to display the ID tag. According to one embodiment, the CS sends a multimedia message to the handheld device when a session is established or session request is routed to or accepted by the handheld device in step S2. The multimedia message at least comprises an ID tag. The multimedia message may be one of: Multimedia Messaging Service (MMS) message, e-mail, v-card, etc. Upon receiving the multimedia message, one or more actions may required from the user in order to display the ID tag on the display, e.g. open the message and/or open the attached ID tag. This approach allows the CS to send an ID tag which is unique to the ongoing session. Hence, security is higher since the ID tag is secret until the user receives it on its handheld device.

When the session is established between the first multimedia endpoint (e.g.

EndpointY) and the handheld device, the first user (e.g. userY) and second user (e.g. userX) may communicate via audio and/or video while the second user (UserX) is looking for an unoccupied multimedia endpoint. Upon entering e.g. an empty meeting room with a second multimedia endpoint (e.g. EndpointZ), userX holds the handheld device in front of the second multimedia endpoint' s camera (as illustrated in figure 5), such that the display of the handheld device faces the camera lens. An ID tag detection module of the second multimedia endpoint, which repeatedly checks the video stream for ID tags, detects that an ID tag is captured and decodes the data stored in the ID tag. Based on data from the ID tag and data stored in a memory of the ID tag detection module, the ID tag detection module sends an instruction to the CS 1 10.

The process proceeds to step S4, where an inquiry is made regarding whether a ID tag detection message is received by the CS 1 10 from an multimedia endpoint. If the response to the inquiry in step S4 is negative, the process returns to step S4. The barcode image detection message comprises a set of instruction parameters. The barcode image detection message parameters may comprise, but are not limited to; the address of the second endpoint (e.g. EndpointZ) that sent the message and the user name (or user ID) of the second user that initiated the instruction by showing the ID tag to the endpoint' s camera. Optionally, the instruction may also identify the session ID of the session currently ongoing with the handheld device of said user. If the response to the inquiry in step S4 is affirmative, the process proceeds to step S5, where the SMM sends a session request to the second multimedia endpoint (e.g. EndpointZ), based on the received ID tag detection message and the message parameters. If the session request is accepted by the second multimedia endpoint (EndpointZ), the connection to the handheld device of the second user (e.g. UserX) is terminated, and a session between the first multimedia endpoint (e.g. Endpoint Y) and the second multimedia endpoint (e.g. EndpointZ) is established in step S5. In one aspect, the second multimedia endpoint is auto answer enabled such that the session request is automatically accepted by the second multimedia endpoint.

In another aspect, the ID tag comprises data instructing the second multimedia endpoint to enable the auto answer feature for a one-time instance.

In another aspect, the user must accept the call manually.

In a session between a first endpoint and a second endpoint, transferring a session from the second endpoint to a third endpoint refers to always keeping the first endpoint in the session while disconnection the second endpoint from the session and connecting the third endpoint to the session. There are several ways of implementing a session transfer, e.g. not disconnecting the second endpoint until the third endpoint has accepted a session request, or disconnecting the second endpoint when sending a session request to the third endpoint, etc.

According to one exemplary embodiment, the CS 110 may use parts of the standard H.450.5 created by the International Telecommunications Union (ITU). H.450.x was created to define several Supplementary Services of the packet based telecommunication protocol known as H.323. H.450.5, also known as Park and Pickup, facilitates session center services and terminal mobility. A user calling a call center is put into park mode until an agent is available for call pickup or a user can put a call into park mode at endpoint A and pick the call up at an endpoint B. The user is prompted a 4- 10 digit access number which must be dialed/entered at the pickup endpoint. According to this exemplary embodiment of the present invention, instead of parking the call, the CS 110 routes the call to the user's handheld device as described above, where the conversation continues uninterrupted. Simultaneously, the CS 110 codes the access number into an ID tag and sends it to the same handheld device, as described above. When the user finds a multimedia endpoint where he/she wishes to pick up the call, the user shows the ID tag to the multimedia endpoints camera, which in turn decodes the ID tag, retrieves the access number and send the access number to the CS 1 10. Upon receiving the access number from the endpoint, the CS 110 transfers the call to the endpoint that sent the access number.

Claims

1. Method for transferring a collaboration session, the method comprising: receiving, at a collaboration server (1 10), a session request from a first multimedia endpoint addressed to a user; and

establish a session between said first multimedia endpoint and a handheld device (163) associated with said user in a user database (330);

providing session data associated with the session to a second multimedia endpoint by:

encoding the session data into a barcode image;

displaying the barcode image on a display of the handheld device (163); retrieving and decoding the barcode image at the second multimedia endpoint by using a camera associated with the second multimedia endpoint; receiving, at the collaboration server (1 10), a barcode image detection message from the second multimedia endpoint, and in response transferring the session from the handheld device (163) to the second multimedia endpoint, based on session data associated with the session and the address of the second multimedia endpoint embedded in the barcode image detection message.

2. Method according to claim 1 , wherein the method further comprises the steps of:

storing session data for a collaboration session in a session database (340) when a collaboration session between two or more endpoints is established, said session data comprises one or more of the following parameters: session ID, user ID of the user, address or dial-up number of one or more of the endpoints in the session, session status; and where

the session data in the barcode image detection message comprise at least said user ID.

3. Method according to claim 1 , wherein the step of providing said session data to a second multimedia endpoint further comprises;

at predefined events, distributing the barcode image to the handheld device (163).

4. Method according to claims 3, wherein the step of distributing the barcode image further comprises:

sending a multimedia message to the handheld device (163) when establishing the session, where said multimedia messages comprises one of: multimedia messaging service (MMS), email, v-card.

5. Method according to claims 3, wherein the step of distributing the barcode image further comprises: pre-distribute at least barcode images to the handheld devices in the user database (330); and

automatically display the barcode image on the handheld device (163) when a session request is received from a gateway used to communicate with the handheld device (163).

6. Method according to claims 5, wherein the step of distributing the barcode image further comprises:

pre-distributing at least one barcode image and gateway address to the handheld devices in the user database (330); and

associatively store said barcode image(s) and gateway address(es) in a phone book of the handheld device (163).

7. Method according to claims 5, wherein the step of providing said session data to a second multimedia endpoint further comprises:

pre-distribute an application to the handheld devices in the user database (330), where said application is configured to automatically display the barcode image on the handheld device (163) when a session request is received from a gateway used to communicate with the handheld device.

8. Method according to claim 1 , wherein the step of establishing a session between the first multimedia endpoint and the handheld device (163) further comprises: establish a session between said first multimedia endpoint and a third multimedia endpoint, where the third multimedia endpoint is associated with said user in the user database;

receiving a transfer call message from said third multimedia endpoint, and in response transferring the session from the third multimedia endpoint to the handheld device (163).

9. Method for transferring a collaboration session, the method comprising receiving, at a collaboration server (1 10), a session request from a first multimedia endpoint addressed to a user; and

providing session data associated with the session and/or one or more instructions to a second multimedia endpoint by:

encoding the session data and/or one or more instructions into a barcode image;

displaying the barcode image on a display of the handheld device (163); retrieving and decoding the barcode image at the second multimedia endpoint by using a camera associated with the second multimedia endpoint; sending a session request from the second multimedia endpoint to the first multimedia endpoint based on the decoded session data and/or one or more instructions.

10. Method according to claim 9, wherein said barcode image comprises at least the address of the first multimedia endpoint and an instruction to the second multimedia endpoint to establish a session with the first multimedia endpoint.

1 1. Method according to claim 10, wherein the step of providing said session data to a second multimedia endpoint further comprises at predefined events, distributing the barcode image to the handheld device (163).

12. Method according to claims 1 1 , wherein the step of distributing the barcode image comprises sending a multimedia message to the handheld device (163) in response to establishing the session, where said multimedia messages comprises one of: multimedia messaging service (MMS), email, v-card.

13. Method according to claims 1 1 , wherein the step of providing said session data to a second multimedia endpoint further comprises:

pre-distribute at least barcode images to the handheld devices in the user database (330); and

14. Method according to one of the claims 9-13, wherein the step of establishing a session between the first multimedia endpoint and the handheld device (163) further comprises:

establish a session between said first multimedia endpoint and a third multimedia endpoint, where the third multimedia endpoint is associated with said user in a user database (330);

15. A collaboration server (1 10) for transferring a collaboration session from a handheld device (163) to a multimedia endpoint, said collaboration server comprises:

a user database (330); a session management module (310) configured to receive a session request addressed to a user from a first multimedia endpoint and establish a session between the first multimedia endpoint and a handheld device (163) associated with the user; and

a barcode management module (320) configured to encode session data associated with the session and/or instructions into a barcode image, and distribute said barcode image to the handheld device (163) on predefined events.

16. A collaboration server (1 10) according to claim 15, wherein the session management module (310) is further configured to receive a barcode image detection message from a second multimedia endpoint, and in response transfer the session from the handheld device (163) to the second multimedia endpoint based on the session data and the address of the second multimedia endpoint embedded in the barcode image detection message.

17. A collaboration server (1 10) according to one of claims 15-16, wherein the collaboration server (1 10) further comprises:

a session database (340) for storing session data for a collaboration session when a collaboration session between two or more endpoints is established, said session data comprises one or more of the following parameters: session ID, user ID of the user, address or dial-up number of one or more of the endpoints in the session, session status; and where

the session data in the barcode image detection message comprise at least said user ID and/or session ID, and where

said session between the first and second multimedia endpoint is established based on said user ID and/or session ID and parameters in the session database.

18. A collaboration server (1 10) according to claim 15, wherein the barcode image comprises at least the address of the first multimedia endpoint and an instruction to a second multimedia endpoint to establish a session with the first multimedia endpoint.

19. A multimedia endpoint comprising:

at least one camera; and

a barcode reader module configured to:

analyze images from said camera to detect a barcode image displayed on a handheld device (163), and decode said barcode image to extract session data and/or instructions; and send a barcode image detection message to a collaboration server (1 10) when a barcode image is detected and decoded, said barcode image detection message comprises at least parts of the barcode data and the address of the multimedia endpoint; or

if a establish session instruction is detected, instruct the multimedia endpoint to establish a session with a first multimedia endpoint identified in said session data.

20. A multimedia endpoint according to claim 19, where said barcode reader module is further configured to:

instruct a control unit of the multimedia endpoint to enable a one-time auto answer setting if a auto answer instruction is detected when decoding the barcode image.