WO2010145183A1 - 向群组传送大消息模式cpm消息媒体链路创建的方法 - Google Patents
向群组传送大消息模式cpm消息媒体链路创建的方法 Download PDFInfo
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- WO2010145183A1 WO2010145183A1 PCT/CN2009/076296 CN2009076296W WO2010145183A1 WO 2010145183 A1 WO2010145183 A1 WO 2010145183A1 CN 2009076296 W CN2009076296 W CN 2009076296W WO 2010145183 A1 WO2010145183 A1 WO 2010145183A1
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- Prior art keywords
- message
- function
- srp
- client
- rest
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000013256 coordination polymer Substances 0.000 claims description 208
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- JOJYUFGTMHSFEE-YONYXQDTSA-M Cytarabine ocfosphate Chemical compound [Na+].O[C@H]1[C@H](O)[C@@H](COP([O-])(=O)OCCCCCCCCCCCCCCCCCC)O[C@H]1N1C(=O)N=C(N)C=C1 JOJYUFGTMHSFEE-YONYXQDTSA-M 0.000 description 8
- 239000002023 wood Substances 0.000 description 6
- 230000011664 signaling Effects 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/56—Unified messaging, e.g. interactions between e-mail, instant messaging or converged IP messaging [CPM]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/58—Message adaptation for wireless communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
Definitions
- CP was proposed by (O A, Ope ob e ch ec ) in 2005, and its purpose is to intercommunicate with multiple messages, provide unified messages, and improve the message of each party.
- the CP fuses the existing multiple messages, including the message ( , ae age , ( OC h TO Ta Ove Ce a , ⁇ ⁇ ( ( E , ob e - E at ), message each (S, Sho e ag g Sevce, each ( S, eda e ag gSevce) and so on.
- CP's inactivity include a mode-based CP message, a large message mode CP message in the mode (e o - od ), and other CPs in (e o ).
- e o - od large message mode CP message in the mode
- e o - od large message mode CP message in the mode
- the restricted CP message for example, the 1300, large message mode CP message cannot be directly used by the (SP, Se o a o ooco) ESSAGE message bearer.
- the CP client (PC e ) CP engine (P North e) uses the SP ESSAGE message page-ode message.
- the terminal needs to introduce a large message mode CP message. If the size of the message is limited, it cannot be used.
- SP ESSAGE bearer If the size of the message is limited, it cannot be used.
- CP e-de edGo p CP Ad-hoc Go p
- CP users can send messages to certain media or CPs, but the message size is limited, so it cannot be carried by SP ESSAGE.
- the big message mode CP message to the force of the order to go to and from the rest, that is, along the order, rest off.
- the message (VT) of the large message mode CP message is used first.
- the CP client control function is the same, the control function is the same as the receiving CP client, and the CP client control function is closed. CP customer with the same, through
- SRP e ageSe o Reay ooco is used to receive the content of the CP message of the CP client big message mode CP message, that is, the content of the CP message.
- the CP has a plan to go to the same place, and the function and control functions are closed.
- the other solution is to need the function and the control function.
- the present invention provides a method for the message message to the large message mode, which is used to solve the problem that the existing wood lacks the message message to the large message mode, and the SRP is more in each function.
- the CP client and the function function are closed, the control function is closed, the control function is closed, and the destination function is the same, and the destination function is closed and the receiving CP client is in the same segment SRP, and the SRP is connected to the message in the message before the SRP.
- SRP connection parameter SRP SRP.
- the first message sent by the friend to the CP client message is sent from the P/P to the function, the function is the second message, and the second message is changed from the P/P to the control function.
- Each of the control functions is held by the third home message, and the third home message is sent by the P/P to the destination function, and the destination message is sent by the SP.
- Receiving a CP client the receiving CP client generates a success message, the first success message is caused by the SP/P to the destination function, and the destination function is a third success message.
- the control function is configured to receive the second message, or receive the third success message, and generate a second success message, where the second success message is from the P/P to the function,
- the function suspends a success message, the first success message is from the SP/P to the CP client
- the function is a second message, and the second message 5 is caused by the P/P to the control function.
- the control function is a third message, and the third message is from the P/P to the destination function.
- the destination function is a message, and the message is from the P/P to the receiving CP client.
- the CP client receives the same message from the CP client, and uses the SRP to receive the message from the CP client's large message mode CP message, that is, the content of the CP message. Under the wooden background of the Hugh Plan, this is a break plan.
- This provides a message to the big message mode.
- the method, the method, in the large message mode, the CP message has the same function as the SRP Hugh.
- This provides a scheme for SRP, which is separate from the message.
- SRP shown in 1 and 2, because the direction indicated by the direction of the message received by the SRP, 3 and 4, because the direction indicated by the direction of the CP customer force master SRP, as shown in 5, 6 and 7, due to the middle direction Indicate the direction.
- SRP in this description is controlled (TCP, Ta o Co o ooco ), Control (SCTP, S ea Co to Ta o ooco) and other interfaces.
- 1, 2, 3, 4, 5, 6 and 7 are based on the CP client to the large message mode CP message, large message mode CP message SRP
- the CP client is introduced to the large message mode CP, ie the program.
- the main steps of the SRP of the message include the following steps
- Step 01 CP C e A to the first message (P VT ) of the large message mode CP message.
- the message SP/P is from function to ( g a g cpa o c o ) A, that is, the function is closed, and the function is closed.
- Step S102 Function A, receiving a message that is not in step S1.
- the message received by the back-to-back user agent (B2B A, Bac oBac e Age) is a new message (P VT ), which is the second message, and the message.
- P VT Message SP/P to Control Function Hugh
- Step S103 the control function X, receives the message of the step S102, and the message B2B A receives the message, the second success message of the household (P200), and the message SP/P to the function of the other side.
- Receiving in the middle of the W), the function of the X-new student (P VT), that is, the third house The message, described in the message (S, Se oecpo Pooco).
- the SRP is included, and the SRP connection parameter information of the control function X is included.
- Step S104 The function A receives the second success in step S103, and the message B2B A receives the message of the user, a new message (P200), that is, the first success message.
- the message SP/P is from CP C e A. SP200O S P Function SRP connection parameter information of the A.
- Step 5 CP C e A receives the first success message in step S104, the first message (P AC ), and the AC message SP/P is from function to A.
- Step S106 The function A receives the message No in step S105, the aspect, the new AC, that is, the second message, the message, the second message SP/P is controlled by the control function X, and the control of the SP in the SP200 O message Function Hugh X's SRP connection parameters to
- This function is the second rest of the control function.
- the second break, the middle SRP SE is closed.
- Step S107 the function B receives the message received in step S103, and the message received by the force B2B A, the new message of the household (P VT ), that is, the message, the message SP/P to the CP C e B
- Step 8 CP C e B receives the first message from step S107, the first success message of the household message (SP200).
- SP200O contains S P ,
- Step S109 Function H receives the first success in step S108, and the message received by B2B A is the user's new message (P 200O ), that is, the third success message.
- P 200O the user's new message
- the third SP200O contains the SRP connection information of the S P function.
- Step S 0 Control function Hugh X receives the third successful message from step S109. Receiving, controlling functions, receiving the third message, the third message, P/P, to the purpose,
- control function of the S SP in the X SP200O message is the SRP connection information of the B.
- the X function is the same as the third rest of the B.
- Step S 1 Function H receives the third message in step S, aspect, new AC message, ie message message, AC
- the SRP of the SP in the SP200O message goes to the information, the SRP connection information of the CP C e B of the S P in the message, or
- Step 2 CP C e B receives the first message that is not in step 11 to accept the primary one. In the SRP, receive the rest.
- the SRP connection information includes a P address and , and / or R . Its P address can be connected to c- by S P , and can be Hugh - and R can go to a-pah .
- function A function B is receiving an AC message, the household AC message. It needs to be explained that the function is A, the function is B, and the control function is successful in receiving the direction of the destination. It can wait for the AC message in the end direction and receive the success message and generate the AC message.
- the SPAC messages of each function in the scheme may be refreshed by each function, or may be directly received AC, and thus are not limited.
- the above program is based on the news.
- the method represented by 2 1 is basically no longer.
- the control function X can receive the SP200O in the direction of the end when receiving the message of the unfunctioned A, but is limited to whether the SP 200 O is received in the untargeted direction, or the control function is X.
- the second rest is the function to receive the AC message. It should be noted that the function A can be used to receive the SRPSE message function of the CP C e A or the uncontrolled function. Success message, second rest
- control function X can immediately return the SP 200 O to the end when receiving the message of the unfunctioned A. 3 or Yes, wait for the success of the untargeted end, and receive the successful return of the untargeted end.
- the destination function is on receiving the SP200O message, and the B2B A message is used to generate a new SP200 O message. , on the other hand, return to the destination SPAC
- the SRP of the message is received, the first message and the success message are received and received, that is, the above is similar, and will not be described again, and it is necessary to explain.
- the second message SP/P is controlled by the control function Hugh X control function Hugh X's three-shelf message control function Hugh X's SRP connection parameters, the third house
- the message SP/P is from CP C e B. Including the next steps
- Step S2 1 CP C e B receives the SP AC message of the unfunctioned B, and the phase of the break is the SRP connection parameter information of the B function, or
- the CP C e B function is the same as the first rest.
- Step S22 Function B receives the SPAC message of the uncontrolled function X, and the SRP connection parameter information of the control function X, X, or R, the existing work force of the SRP, This
- Step S23 the control function X accepts the SPAC that is not functionally closed A, and the rest of the rest is ready to function.
- SRP connection parameter information, or, and R the existing work force SRP, thus
- Step S204 The function A is received by the SC without the CP C e A , and the phase of the Hugh is the SRP connection parameter information of the CP C e A, or the R and the existing work force SRP of the R Function Hugh A CP C e A Same as the rest.
- the SRP connection parameter information includes the P address and , and / or R parameters.
- the P address can be connected to the parameter c- by the S P
- the parameter - and the R parameter can be the parameter a-p h .
- the function B is receiving an AC message, an AC message. It needs to be explained that the function is A, the function is B, and the control function X is successful in receiving the direction of the destination. It can wait for the AC message in the direction of the end, and the success message is the AC message.
- the SPAC messages in each function can be refreshed by each function, or can be directly received AC messages, and this is not done.
- control function X can immediately return the SP200O to the end if it receives the message of the unfunctioned A. 7 or Yes, wait for the success of the untargeted end, and receive the unsuccessful return to the SP200O. 5 and 6.
- the first message and the success message are received and received, that is, the above scheme is similar, and will not be described again. It is necessary to explain.
- the second successful message control function of the CP C e B control function X is the SRP connection parameter of the X
- the message P/P is connected to the SRP connection parameter of the function A, or the second message of the function A
- the message P/P is controlled by the control function X.
- the control function X is in the third round message.
- CP C e A Receive success Message SP200O CP C e A Message S C , AC message SP/P to function A.
- CP C e A is based on the SRP connection parameter result of SP200O, that is, the SRP connection parameter information of function A, or , and the existing SRP of R. Therefore, the CP C e A function is the same as the first rest.
- Step 302 Function A receives the SPAC that is not CP C e A, and the rest of the SRP connection parameter information, that is, the SRP connection parameter information of the function, to, or And the R match of the existing work force of this SRP, by the function Hugh A control function Hugh X with the second rest.
- Step 304 CP C e B receives the SPAC message of the non-functional B, and the rest of the SRP connection parameter information, that is, the SRP connection parameter information parameter of the function B,
- control function can receive the message, wait for the success of the untargeted end, and return to success.
- the basics shown in 7 are similar, and will not be described again.
- the SRP connection parameter information includes a P address and , and / or an R parameter.
- the P address can be connected to the parameter c- with S P
- the parameter - and the R parameter can go to the parameter a-p h .
- the second rest is determined by the function A, which may be the AC message received during the function A, or the SRPSE message when the function A is not receiving the CP C e A
- the function Hugh A can also receive the uncontrolled function Hugh X's success message, the second Hugh.
- the third rest of the fruit is controlled by the function X, which can be received by the control function X, or it can be the control function X.
- the SRPSE message control function is not available.
- control function X is able to return to the SP200O in the direction of the end, or to wait for the success of the untargeted end, and receive the successful return of the untargeted end. SP200O.
- the function A, the function B is receiving an AC message, an AC message.
- the function is a
- the function is B
- the control function X is successful in receiving the direction of the destination, and can wait for the AC message in the opposite direction
- the received success message is the AC message.
- the SPAC message of each function in the solution may be a new function of each function, or may be an AC message directly received, which is not limited herein. In the above schemes, if the SRP is by the message, the SP 200 O in the direction of receiving the destination is not received, or the SPAC in the direction of the end is received, or the SRPSE in the direction of the end is received.
- the proposed method for the large message mode CP message is the same as the CP message with less than 1300.
- the SRP can be pre-emptive, that is, in advance, or S P not. If the result of S P is not, then in the rest, you can pre-empt the function according to the value of S P .
- the premise of the above scheme (that is, the fixed action of the main force) can be regarded as the predetermined situation of the divine situation, but in the rest, the function can also be closed or the angle, and the result of the unified SP is not determined. Be.
- the message of the message mode CP message and the message SP of the success message are exchanged, and the solution of the SRP is required to connect to the large message mode CP message, and the result is to receive or receive the message.
- the SRP is connected, and the CP client receives the complete SRP of the CP client.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Multimedia (AREA)
- Telephonic Communication Services (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/257,870 US8688848B2 (en) | 2009-06-16 | 2009-12-30 | Method of establishing a media link for transmitting a large message mode CPM message to a group |
KR1020127000875A KR101403784B1 (ko) | 2009-06-16 | 2009-12-30 | 그룹에 대용량 메시지 모드의 cpm 메시지를 전송하기 위한 미디어 링크 설립 방법 |
EP09846097.5A EP2434714A4 (en) | 2009-06-16 | 2009-12-30 | MEDIA CONNECTION MANAGEMENT METHOD FOR TRANSMITTING CPM NEWS IN LARGE MESSAGE MODE TO GROUPS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910108302 | 2009-06-16 | ||
CN200910108302.X | 2009-06-16 |
Publications (1)
Publication Number | Publication Date |
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WO2010145183A1 true WO2010145183A1 (zh) | 2010-12-23 |
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PCT/CN2009/076296 WO2010145183A1 (zh) | 2009-06-16 | 2009-12-30 | 向群组传送大消息模式cpm消息媒体链路创建的方法 |
Country Status (5)
Country | Link |
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US (1) | US8688848B2 (zh) |
EP (1) | EP2434714A4 (zh) |
KR (1) | KR101403784B1 (zh) |
CN (1) | CN101925023B (zh) |
WO (1) | WO2010145183A1 (zh) |
Families Citing this family (1)
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CN104135468B (zh) * | 2014-07-01 | 2017-04-05 | 东北大学 | 支持多径中继传输的ims会话协商控制系统、装置及方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1842179A (zh) * | 2005-04-01 | 2006-10-04 | 三星电子株式会社 | 发送参与无线一键通网络会话的响应方信息的方法和系统 |
WO2008007869A1 (en) * | 2006-07-10 | 2008-01-17 | Samsung Electronics Co., Ltd. | Method for transferring and applying floor control scheme in poc session and system for implementing the same |
WO2008060085A1 (en) * | 2006-11-13 | 2008-05-22 | Samsung Electronics Co., Ltd. | Method and system for managing message threads in converged ip messaging service |
CN101227418A (zh) * | 2007-01-19 | 2008-07-23 | 华为技术有限公司 | 一种实现融合ip消息的方法、装置及系统 |
Family Cites Families (3)
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KR101506029B1 (ko) * | 2006-11-13 | 2015-03-27 | 삼성전자주식회사 | 통합 메시징 서비스를 제공하기 위한 시스템과 방법 |
CN101257375B (zh) * | 2006-12-31 | 2012-08-08 | 华为技术有限公司 | 实现多终端的消息同步的方法及装置 |
US8099089B2 (en) * | 2008-05-13 | 2012-01-17 | Nokia Corporation | Method, user equipment and software product for media stream transfer between devices |
-
2009
- 2009-07-11 CN CN200910160757.6A patent/CN101925023B/zh active Active
- 2009-12-30 EP EP09846097.5A patent/EP2434714A4/en not_active Withdrawn
- 2009-12-30 KR KR1020127000875A patent/KR101403784B1/ko active IP Right Grant
- 2009-12-30 US US13/257,870 patent/US8688848B2/en active Active
- 2009-12-30 WO PCT/CN2009/076296 patent/WO2010145183A1/zh active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1842179A (zh) * | 2005-04-01 | 2006-10-04 | 三星电子株式会社 | 发送参与无线一键通网络会话的响应方信息的方法和系统 |
WO2008007869A1 (en) * | 2006-07-10 | 2008-01-17 | Samsung Electronics Co., Ltd. | Method for transferring and applying floor control scheme in poc session and system for implementing the same |
WO2008060085A1 (en) * | 2006-11-13 | 2008-05-22 | Samsung Electronics Co., Ltd. | Method and system for managing message threads in converged ip messaging service |
CN101227418A (zh) * | 2007-01-19 | 2008-07-23 | 华为技术有限公司 | 一种实现融合ip消息的方法、装置及系统 |
Non-Patent Citations (1)
Title |
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See also references of EP2434714A4 * |
Also Published As
Publication number | Publication date |
---|---|
US8688848B2 (en) | 2014-04-01 |
CN101925023A (zh) | 2010-12-22 |
CN101925023B (zh) | 2014-09-10 |
EP2434714A4 (en) | 2013-08-28 |
EP2434714A1 (en) | 2012-03-28 |
US20120089741A1 (en) | 2012-04-12 |
KR20120019506A (ko) | 2012-03-06 |
KR101403784B1 (ko) | 2014-06-03 |
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