WO2012097531A1 - 可视通信实现方法及终端 - Google Patents

可视通信实现方法及终端 Download PDF

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Publication number
WO2012097531A1
WO2012097531A1 PCT/CN2011/071544 CN2011071544W WO2012097531A1 WO 2012097531 A1 WO2012097531 A1 WO 2012097531A1 CN 2011071544 W CN2011071544 W CN 2011071544W WO 2012097531 A1 WO2012097531 A1 WO 2012097531A1
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WO
WIPO (PCT)
Prior art keywords
terminal
bluetooth
wireless communication
initiator
communication link
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Application number
PCT/CN2011/071544
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English (en)
French (fr)
Inventor
杨惠
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP11856067.1A priority Critical patent/EP2667597B1/en
Priority to US13/978,264 priority patent/US9083847B2/en
Publication of WO2012097531A1 publication Critical patent/WO2012097531A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • H04N7/141Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148Interfacing a video terminal to a particular transmission medium, e.g. ISDN
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066Session management
    • H04L65/1069Session establishment or de-establishment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/18Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • a videophone service is a multimedia communication service that integrates image and voice, and can realize face-to-face real-time communication, that is, both parties can see each other's scenes during a call.
  • a videophone service is a multimedia communication service that integrates image and voice, and can realize face-to-face real-time communication, that is, both parties can see each other's scenes during a call.
  • Bluetooth technology is jointly created by Ericsson and a special interest group (SIG) formed by companies such as Intel, IBM, Nokia, and Toshiba. From the 2004 Bluetooth 1.0 release to the Bluetooth 3.0 release, Bluetooth technology has experienced a thriving development.
  • a primary object of the present invention is to provide a visual communication implementing method and terminal to solve at least the above problems.
  • a method for implementing a visual communication including: an initiator terminal and a receiver terminal of a visual communication establish a relationship between the initiator terminal and the receiver terminal through respective Bluetooth modules a Bluetooth wireless communication link; the multimedia information is transmitted between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link, and visual communication is performed.
  • the method further includes: mutually transmitting the initiator terminal and the receiver terminal Controlling the information, instructing the peer to adjust the transmit and receive power of the Bluetooth module to the preset target value; and transmitting the multimedia information between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link includes: The initiator terminal and the receiver terminal respectively use The preset target value indicated by the received control information is used as the current transmit and receive power of the Bluetooth module, and the multimedia information is transmitted through the established Bluetooth wireless communication link.
  • the sending of the control information between the initiator terminal and the receiver terminal to indicate that the other party adjusts the transmit and receive power of the Bluetooth module to the preset target value includes: the initiator terminal to the receiver The terminal sends the first control information, instructing the receiver terminal to adjust the transmit and receive power of the Bluetooth module of the receiver terminal to a preset target value indicated by the first control information;
  • the second control information is sent to the initiator terminal, indicating that the initiator terminal is the initiator terminal The transmit and receive power of the Bluetooth module is adjusted to a preset target value indicated by the second control information.
  • the preset target value indicated by the control information is a maximum transmit power of a Bluetooth module of the terminal that receives the control information.
  • the control information is sent by a link management protocol LMP entity of the Bluetooth module through an LMP protocol data unit PDU.
  • the initiator terminal and the receiver terminal of the visual communication establish a Bluetooth wireless communication link between the initiator terminal and the receiver terminal through respective Bluetooth modules, including: a Bluetooth module of the initiator terminal
  • the video call control VCC entity receives an instruction from the application of the initiator terminal to establish the Bluetooth wireless communication link through an interface; the VCC entity controls the baseband layer to initiate query, paging, and query scanning through the interface.
  • the VCC entity controls the LMP entity to establish and publish the Bluetooth wireless communication link with the recipient terminal through an interface.
  • the multimedia information is transmitted between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link
  • the visual communication comprises: the VCC entity controls the internal use by using a voice and video synchronization control interface. And connecting, by the application, the visual communication on the established Bluetooth wireless communication link, by transmitting multimedia information between the internal visible path and the application of the receiver terminal.
  • the method before the transmitting the multimedia information by using the established Bluetooth wireless communication link between the initiator terminal and the receiver terminal, the method further includes: the VCC entity successfully establishing the Bluetooth wireless communication link The message is fed back to the application of the initiator terminal; the initiator terminal The peer-to-peer multiplexing information interaction and logical channel communication are performed between the application and the application of the receiver terminal using H.324 signaling.
  • the method further includes: one of the initiator terminal and the receiver terminal initiating a visual communication end command to the opposite end; removing between the initiator terminal and the receiver terminal The logical channel; tearing down a Bluetooth wireless communication link between the initiator terminal and the receiver terminal.
  • a terminal includes: a Bluetooth module, configured to interact with a Bluetooth module of a peer end, establish a Bluetooth wireless communication link between the terminal and the opposite end; a visual communication module, And transmitting, by the Bluetooth wireless communication link established between the opposite end, multimedia information, for visual communication.
  • the terminal further includes: a control transceiver module, configured to send, to the opposite end, first control information for indicating that the transceiver power of the Bluetooth module of the opposite end is adjusted to a preset target value, and receiving the source information Determining, by the opposite end, second control information for adjusting a transmit power of the Bluetooth module of the terminal to a preset target value; the visual communication module is configured to use a preset target value indicated by the second control information As the current transceiving power of the Bluetooth module of the terminal, the multimedia information is transmitted through the established Bluetooth wireless communication link, and visual communication is performed.
  • a control transceiver module configured to send, to the opposite end, first control information for indicating that the transceiver power of the Bluetooth module of the opposite end is adjusted to a preset target value, and receiving the source information Determining, by the opposite end, second control information for adjusting a transmit power of the Bluetooth module of the terminal to a preset target value
  • the visual communication module is configured to use a preset target value indicated by
  • a Bluetooth wireless communication link is established between the initiator terminal and the receiver terminal through respective Bluetooth modules, and the multimedia information of the visual communication is transmitted through the established Bluetooth wireless communication link, and visual communication is performed, and the related information is solved.
  • visual communication requires the support of the operator, affecting the application range of the videophone service, so that two Bluetooth mobile phones in the same network can directly perform visual communication without using the public telephone network, and the method adopts Bluetooth technology and low rate.
  • the audio/video codec technology is organically combined, and has the flexibility of connecting networks and the ability to transmit over low bandwidth channels.
  • FIG. 1 is a flowchart of a method for implementing visual communication according to an embodiment of the present invention
  • 2 is a structural block diagram of a terminal according to an embodiment of the present invention
  • FIG. 3 is a block diagram showing a preferred structure of a terminal according to an embodiment of the present invention
  • FIG. 4 is a protocol frame diagram of implementing internal visual communication based on Bluetooth according to Embodiment 1; 5 is an implementation flow of Bluetooth-based internal visual communication according to Embodiment 2; FIG. 6 is a flowchart of implementing internal visual communication based on Bluetooth according to Embodiment 3.
  • BEST MODE FOR CARRYING OUT THE INVENTION will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • 1 is a flowchart of a method for implementing visual communication according to an embodiment of the present invention.
  • the method includes: Step S102: an initiator terminal and a receiver terminal of a visual communication establish an initiator terminal and a receiver through respective Bluetooth modules. a Bluetooth wireless communication link between the terminals; Step S104, the multimedia information is transmitted between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link, and visual communication is performed.
  • visual communication can be realized by Bluetooth without using the public telephone network provided by the operator.
  • the method 4 bar Bluetooth technology and the rate audio/video codec technology are organically combined, and have the characteristics of flexible networking and transmission through a low bandwidth channel.
  • This technology is Bluetooth's "three-in-one," further extension of the application. For example: In the office building, it is an internal videophone that does not charge any fees.
  • Bluetooth transmission is a wireless transmission, and one of the characteristics of the wireless channel is easy to attenuate, especially when obstacles are encountered on the transmission path, such as occlusion of objects such as walls, the attenuation becomes more apparent.
  • Bluetooth-based internal visual communication may be affected, such as audio/video out-of-sync, video blurring and mosaic, or even normal communication. For this reason, without adding hardware, The internal visual communication is ensured by increasing the transmission and reception power of the Bluetooth module of both parties.
  • the initiator terminal and the receiver terminals can mutually send control information to indicate that the peer end has its own Bluetooth module.
  • Transceiver power is adjusted to a preset target Value: When the multimedia information is transmitted between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link, the initiator terminal and the receiver terminal respectively use the preset target value indicated by the received control information as the current Bluetooth module. Transceiver power, multimedia information transmission through the established Bluetooth wireless communication link.
  • the process of mutually transmitting control information between the initiator terminal and the receiver terminal, instructing the other party to adjust the transmission and reception power of the Bluetooth module of the UE to the preset target value may be performed in the following sequence:
  • the party terminal sends the first control information, instructing the receiver terminal to adjust the transmit and receive power of the Bluetooth module of the receiver terminal to the preset target value indicated by the first control information; and the receiving terminal completes the transmit and receive power of the Bluetooth module of the receiver terminal Adjusting to the preset target value indicated by the first control information, sending the second control information to the initiator terminal, instructing the initiator terminal to adjust the transmit and receive power of the Bluetooth module of the initiator terminal to the preset target value indicated by the second control information .
  • the preset target value indicated by the control information is the maximum transmit power of the Bluetooth module of the terminal that receives the control information, which can ensure the quality of the visual communication as much as possible, and does not need to introduce a complicated judgment process.
  • the Link Management Protocol (LMP) entity of the Bluetooth module of the two communication parties can control the Bluetooth modules of both parties through the interaction of the LMP PDU.
  • the above control information may be sent by the LMP entity of the Bluetooth module through a LMP Protocol Data Unit (PDU).
  • the initiator of the internal visual communication sends the corresponding PDU to the receiver, requesting the booster power. Until the receiver reaches the maximum power; then, the receiver sends the corresponding PDU to the sender, requesting the power of the power p until the sender reaches the maximum power. After this, the transmission of the visual communication PDU can be performed.
  • the power of both the transmitting and receiving sides is maintained at the maximum value to ensure the normal operation of the communication.
  • the existing network protocol and its architecture can be reused to perform the entire internal visual communication process.
  • a video call control (VCC) entity can be added to control the entire Considering the communication process, wherein: the initiator terminal and the receiver terminal of the visual communication establish a Bluetooth wireless communication link between the initiator terminal and the receiver terminal through respective Bluetooth modules, including: VCC in the Bluetooth module of the initiator terminal
  • the entity receives the Bluetooth wireless communication chain from the application of the initiator terminal through the interface.
  • the instruction of the path; the VCC entity controls the baseband layer to initiate the process of query, paging, query scanning, and page scanning through the interface; the VCC entity controls the LMP entity to establish and publish a Bluetooth wireless communication link with the receiver terminal through the interface.
  • the multimedia communication is transmitted between the initiator terminal and the receiver terminal through the established Bluetooth wireless communication link, and the visual communication includes:
  • the VCC entity uses the voice and video synchronization control interface to control the connection of the internal visual path, and is applied to the established Bluetooth wireless.
  • multimedia information is transmitted between the internal visual path and the application of the recipient terminal for visual communication.
  • the VCC entity feeds back the successful establishment of the Bluetooth wireless communication link to the application of the initiator terminal; the application of the initiator terminal and The peer-to-peer multiplexed information interaction and logical channel communication can be performed between the applications of the receiver terminal using H.324 signaling.
  • one of the initiator terminal and the receiver terminal may initiate a visual communication end command to the opposite end; at the end, the logical channel between the initiator terminal and the receiver terminal may be removed first, and then the initiator is removed.
  • a Bluetooth wireless communication link between the terminal and the recipient terminal In the current specification, Bluetooth supports 2 different types of links: Synchronous with connections
  • SCO synchronous connection-oriented
  • ACL Asynchronous connection-less, abbreviated as ACL
  • SCO is a connection-oriented synchronous link
  • two devices use reserved bandwidth for synchronous communication, similar to circuit switching.
  • SCO packets are mainly used for real-time services, and the information transmission rate is reached. 64 kbit/s.
  • Up to three SCO links can be established for both master and slave devices.
  • ACL is for connectionless asynchronous links, and the master device can reserve any slave device in the non-SCO link reserved time slot.
  • the ACL link is established based on the time slot.
  • the asymmetric connection rate of the ACL is 72.164 kbit/s
  • the reverse response rate is 57.664 kbit/s
  • the symmetric connection rate is 432.664 kbit/s.
  • the real-time transmission of the video signal to the link The choice has relatively high requirements: 1. The transmission rate must be guaranteed; 2. There should not be too much delay. Although the ACL method has a high transmission rate, it may cause a relatively large delay due to its similar characteristics to packet transmission and error retransmission mechanism. Although the SCO mode has a transmission rate of only 64, it is sufficient for multimedia information after H.263 compression. Moreover, the synchronization characteristics of the SCO method are in line with the transmission requirements of real-time signals, so the SCO method can be used for multimedia information transmission. 2 is a structural block diagram of a terminal according to an embodiment of the present invention.
  • the terminal includes: a Bluetooth module 22, configured to interact with the Bluetooth module 22 of the opposite end, and establish a Bluetooth wireless communication between the terminal and the opposite end.
  • the information communication link 24 is configured to transmit multimedia information through the established Bluetooth wireless communication link with the opposite end for visual communication.
  • 3 is a block diagram of a preferred structure of a terminal according to an embodiment of the present invention.
  • the terminal may further include: a control transceiver module 32, configured to send to the opposite end to indicate that the transmit and receive power of the Bluetooth module 22 of the opposite end is adjusted to a preset.
  • FIG. 4 is a protocol framework diagram for implementing internal visual communication based on Bluetooth according to Embodiment 1.
  • the specific instructions are as follows:
  • H.223 Mainly responsible for multiplexing, demultiplexing of video logical channels, voice logical channels, signaling logical channels, and data logical channels. It maintains a channel reuse table and passes it to the peer. It multiplexes the audio video control data stream into a single-bit data stream and demultiplexes the received single-bit data stream into a variety of multimedia streams. In addition, it performs logical frames, numbering sequences, relay-dependent error detection, and error correction, which apply to each media type.
  • H.245 Video telephony signaling control, mainly to complete the exchange of capability information, master-slave decision, video quality control, channel multiplexing table transmission, etc. with remote users.
  • H.324 Controlling and Coordinating H.223, H.245 Protocols, Implementing Calls Initiated by Upper-Layer Applications
  • Interface A the visual call control entity uses this voice and The video sync control interface connects and disconnects internal channels.
  • Interface B used to transmit TCS information on the connection-oriented (point-to-point) L2CAP channel.
  • Interface C the visual call control entity uses this interface to directly control the link manager to establish and publish SCO links.
  • Interface D the visual call control entity uses this interface to control the LC/baseband to directly initiate the query, page, query scan, and page scan processes.
  • Interface E the visual call application uses this interface to inform the visual call control entity to establish a communication link.
  • the visual call control entity VCC Video Call Control
  • H.223, H.245 and H.324 protocols are the relationship between the upper layer protocol and the lower layer transport entity. Its role is to establish a Bluetooth radio bearer for transmitting H.324 protocol data packets, including video, audio, data and multimedia signaling.
  • To dial a Bluetooth-based internal videophone the user must first establish a Bluetooth wireless link through VCC, and then establish multimedia signaling. After the multimedia signaling interaction is successful, video transmission can be performed.
  • the specific interaction process is as follows:
  • the user dials an internal videophone, and the upper layer application sends an instruction to the VCC through the interface E, instructing the VCC to establish a Bluetooth link;
  • VCC controls the baseband layer to initiate the query, paging, query scan, and page scan processes through interface D. 3. After completing the above process, VCC directly controls the link manager through interface C to establish and issue SCO links. After the link is established, the VCC feeds back the message that the link is successfully established to the upper layer application, indicating that the multimedia control signaling interaction can be performed;
  • FIG. 5 is an implementation flow of Bluetooth-based internal visual communication according to Embodiment 2.
  • Step S502 User A (denoted as UE (A)) sends a connection request (Connection request, referred to as Conn Req) command to his own Bluetooth module (BT (A)), ready to establish and user B (denoted as The link of the internal visual communication of UE (B)).
  • Step S504 signaling interaction between the Bluetooth modules to establish a Bluetooth link and configure a Bluetooth link. If the Bluetooth link is established and configured successfully, the Bluetooth module A encapsulates the upper layer connection request PDU and sends it to the Bluetooth module B (denoted as BT (B)). Bluetooth module B passes the PDU to the upper layer and passes the upper connection accept PDU to the Bluetooth module A.
  • Bluetooth module A passes the PDU to the upper layer, indicating that the internal visual communication link is successfully established. Step S506, after the Bluetooth wireless channel connection is established, the Bluetooth module A sends an LMP increase power request (LMP_incr_power_req) PDU to the Bluetooth module B, requesting the Bluetooth module B to enhance the power, and the process continues until the Bluetooth module B receives the LMP maximum. power
  • Step S508 after the power of the two communicating parties is determined, the two terminals start to perform peer-to-peer multiplexing information interaction and logical channel communication by using H.324 signaling, and the specific signaling process is as shown in FIG. 5, firstly, both parties pass Terminal Capability Set The end system capability of both parties to the message exchange; then the Master Slave Determination message is exchanged by the Master Slave Determination message to determine the master-slave; then, the Open Logical Channel signaling is used. The logical channel is opened, and the multiplex table can be sent after the logical channel is opened.
  • FIG. 6 is a flowchart of implementing internal visual communication by Bluetooth according to Embodiment 3, the process comprising: Step S602, User A initiates internal visual communication with User B.
  • Step S604 the upper layer application sends a command to establish a connection to the Bluetooth module, and the Bluetooth wireless link is successfully established.
  • step S606 based on the successful establishment of the Bluetooth wireless link, the H.324 signaling interaction is performed to control and coordinate the H.223 and H.245 protocols to implement the call initiated by the upper layer application.
  • step S608 the users A and B perform internal visual communication.
  • Step 4 gathers S610, and User A (or User B) proposes to end the internal visual communication.
  • step S612 the upper logical link is removed first, and then the Bluetooth wireless link is removed, and the communication ends.
  • the solution provided by the above embodiment can complete the transmission of the visual call PDU on the Bluetooth wireless communication link, so that the user using the Bluetooth mobile phone can directly perform internal visual communication through Bluetooth.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

Abstract

本发明提供了一种可视通信实现方法及终端,该方法包括:可视通信的发起方终端和接收方终端通过各自的蓝牙模块建立起所述发起方终端和所述接收方终端之间的蓝牙无线通信链路;所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无线通信链路传输多媒体信息,进行可视通信。本发明把蓝牙技术和低速率音/视频编解码技术有机地结合起来,具有连接组网灵活多样的特点和通过低带宽信道进行传输的能力。

Description

可 *t信实现方法及终端 技术领域 本发明涉及通信领域, 具体而言, 涉及一种可视通信实现方法及终端。 背景技术 可视电话业务是一种集图像、 语音于一体的多媒体通信业务, 可以实现 人们面对面的实时沟通, 即通话双方在通话过程中能够互相看到对方场景。 该业务的描述参见 3GPP TS、 H.324、 H.245、 H.223。 蓝牙( Bluetooth )技术是以 Ericsson公司为主, 联合 Intel、 IBM, Nokia, Toshiba等公司组成的特别兴趣小组 ( Special Interest Group, 简称为 SIG )所 共同创立的。 从 1999年 Bluetooth 1.0版的 4舞出, 到现在 Bluetooth 3.0版本, 蓝牙技术经历了蓬勃的发展。 由于其独有的优良特性, 蓝牙技术风靡全球。 目前的可视电话业务, 都需要通过公共电话网络来实现, 在实现的过程 中, 需要运营商的支持, 这势必影响可视电话业务的应用范围。 发明内容 本发明的主要目的在于提供一种可视通信实现方法及终端, 以至少解决 上述问题。 根据本发明的一个方面提供了一种可视通信实现方法, 包括: 可视通信 的发起方终端和接收方终端通过各自的蓝牙模块建立起所述发起方终端和所 述接收方终端之间的蓝牙无线通信链路; 所述发起方终端和所述接收方终端 之间通过建立的所述蓝牙无线通信链路传输多媒体信息, 进行可视通信。 优选地, 在所述发起方终端和所述接收方终端之间通过建立的所述蓝牙 无线通信链路传输多媒体信息之前, 还包括: 所述发起方终端和所述接收方 终端之间互发控制信息, 指示对端将其自身的蓝牙模块的收发功率调整到预 设目标值; 所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无线 通信链路传输多媒体信息包括: 所述发起方终端和所述接收方终端分别釆用 接收到的控制信息指示的预设目标值作为蓝牙模块的当前收发功率, 通过建 立的所述蓝牙无线通信链路进行所述多媒体信息的传输。 优选地, 所述发起方终端和所述接收方终端之间互发控制信息, 指示对 方将其自身的蓝牙模块的收发功率调整到预设目标值包括: 所述发起方终端 向所述接收方终端发送第一控制信息, 指示所述接收方终端将所述接收方终 端的蓝牙模块的收发功率调整到所述第一控制信息指示的预设目标值; 所述 接收方终端在完成将所述接收方终端的蓝牙模块的收发功率调整至所述第一 控制信息指示的预设目标值时, 向所述发起方终端发送第二控制信息, 指示 所述发起方终端将所述发起方终端的蓝牙模块的收发功率调整到所述第二控 制信息指示的预设目标值。 优选地, 所述控制信息指示的预设目标值为接收到所述控制信息的终端 的蓝牙模块的最大收发功率。 优选地, 所述控制信息由所述蓝牙模块的链路管理协议 LMP实体通过 LMP协议数据单元 PDU来发送。 优选地, 可视通信的发起方终端和接收方终端通过各自的蓝牙模块建立 起所述发起方终端和所述接收方终端之间的蓝牙无线通信链路包括: 所述发 起方终端的蓝牙模块中的可视呼叫控制 VCC实体通过接口接收到所述发起 方终端的应用发来的建立所述蓝牙无线通信链路的指令; 所述 VCC实体通 过接口控制基带层启动查询、寻呼、查询扫描以及寻呼扫描的过程;所述 VCC 实体通过接口控制 LMP实体建立和发布与所述接收方终端之间的所述蓝牙 无线通信链路。 优选地, 所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无 线通信链路传输多媒体信息, 进行可视通信包括: 所述 VCC实体使用语音 和视频同步控制接口控制内部可视通路的连接, 所述应用在建立的所述蓝牙 无线通信链路上, 通过所述内部可视通路与所述接收方终端的应用之间传输 多媒体信息, 进行可视通信。 优选地, 在所述发起方终端和所述接收方终端之间通过建立的所述蓝牙 无线通信链路传输多媒体信息之前, 还包括: 所述 VCC实体将所述蓝牙无 线通信链路建立成功的消息反馈给所述发起方终端的应用; 所述发起方终端 的应用和所述接收方终端的应用之间釆用 H.324信令进行对等层多路复用信 息交互和逻辑信道通信。 优选地, 在进行可视通信之后, 还包括: 所述发起方终端和所述接收方 终端之一向对端发起可视通信结束命令; 拆除所述发起方终端和所述接收方 终端之间的所述逻辑信道; 拆除所述发起方终端和所述接收方终端之间蓝牙 无线通信链路。 优选地, 所述蓝牙无线通信链路为同步有连接 SCO链路。 根据本发明的另一个方面提供了一种终端, 包括: 蓝牙模块, 设置为与 对端的蓝牙模块交互, 建立起该终端和所述对端之间的蓝牙无线通信链路; 可视通信模块, 设置为和所述对端之间通过建立的所述蓝牙无线通信链路传 输多媒体信息, 进行可视通信。 优选地, 所述终端还包括: 控制收发模块, 设置为向所述对端发送用于 指示将所述对端的蓝牙模块的收发功率调整到预设目标值的第一控制信息, 以及接收来自所述对端的用于指示将所述终端的蓝牙模块的收发功率调整到 预设目标值的第二控制信息; 所述可视通信模块设置为釆用所述第二控制信 息指示的预设目标值作为所述终端的蓝牙模块的当前收发功率, 通过建立的 所述蓝牙无线通信链路传输所述多媒体信息, 进行可视通信。 通过本发明, 发起方终端和接收方终端之间, 通过各自的蓝牙模块建立 蓝牙无线通信链路, 通过建立的蓝牙无线通信链路传输可视通信的多媒体信 息, 进行可视通信, 解决了相关技术中可视通信需要运营商的支持, 影响可 视电话业务应用范围的问题, 使得同一网络中的两个蓝牙手机不通过公共电 话网络可以直接进行可视通信,该方法把蓝牙技术和低速率音 /视频编解码技 术有机地结合起来, 具有连接组网灵活多样的特点和通过低带宽信道进行传 输的能力。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是根据本发明实施例的可视通信实现方法的流程图; 图 2是 居本发明实施例的终端的结构框图; 图 3是 居本发明实施例的终端的优选结构框图; 图 4是根据实施例 1的基于蓝牙实现内部可视通信的协议框架图; 图 5是根据实施例 2的基于蓝牙的内部可视通信的实现流程; 图 6是根据实施例 3的基于蓝牙实现内部可视通信的流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 图 1是根据本发明实施例的可视通信实现方法的流程图, 该方法包括: 步骤 S 102,可视通信的发起方终端和接收方终端通过各自的蓝牙模块建 立起发起方终端和接收方终端之间的蓝牙无线通信链路; 步骤 S 104,发起方终端和接收方终端之间通过建立的蓝牙无线通信链路 传输多媒体信息, 进行可视通信。 通过以上的方法, 用户之间不借助于运营商提供的公共电话网络, 就可 以通过蓝牙实现可视通信。该方法 4巴蓝牙技术和氏速率音 /视频编解码技术有 机地结合起来, 具有连接组网灵活多样的特点和通过低带宽信道进行传输的 能力。 这种技术是蓝牙"三合一,,应用的进一步扩展。 例如: 在办公楼里, 它 是一部不收取任何费用的内部可视电话。 这种不收费的多媒体通信方式使通 信更具多样性和灵活性。 蓝牙传输属于无线传输, 而无线信道的特性之一就是易衰减, 特别是在 传输路径上遇到障碍物, 譬如墙壁等物体的遮挡时, 衰减越发明显。 在这种 情况下, 基于蓝牙的内部可视通信可能会受到一些影响, 会出现音 /视频不同 步、 视频模糊并出现马赛克、 甚至无法进行正常的通信等等现象。 为此, 在 不增加硬件的基础上, 可以通过增加通信双方的蓝牙模块收发功率来保证内 部可视通信的正常进行。 具体地, 在发起方终端和接收方终端之间通过建立 的蓝牙无线通信链路传输多媒体信息之前, 发起方终端和接收方终端之间可 以互发控制信息, 指示对端将其自身的蓝牙模块的收发功率调整到预设目标 值; 发起方终端和接收方终端之间通过建立的蓝牙无线通信链路传输多媒体 信息时, 发起方终端和接收方终端分别釆用接收到的控制信息指示的预设目 标值作为蓝牙模块的当前收发功率, 通过建立的蓝牙无线通信链路进行多媒 体信息的传输。 在具体实施中, 发起方终端和接收方终端之间互发控制信息, 指示对方 将其自身的蓝牙模块的收发功率调整到预设目标值的过程可以按照以下的顺 序进行: 发起方终端向接收方终端发送第一控制信息, 指示接收方终端将接 收方终端的蓝牙模块的收发功率调整到第一控制信息指示的预设目标值; 接 收方终端在完成将接收方终端的蓝牙模块的收发功率调整至第一控制信息指 示的预设目标值时, 向发起方终端发送第二控制信息, 指示发起方终端将发 起方终端的蓝牙模块的收发功率调整到第二控制信息指示的预设目标值。 其中, 控制信息指示的预设目标值为接收到控制信息的终端的蓝牙模块 的最大收发功率, 这种方式能够尽可能地保证可视通信的质量, 而且无需引 入复杂的判断过程。 才艮据 SIG的协议规范, 在蓝牙无线通信链路建立成功后, 通信双方蓝牙 模块的链路管理协议(Link Management Protocol, 简称为 LMP ) 实体, 是可 以通过 LMP PDU的交互来控制双方蓝牙模块的收发功率的, 也就是说, 以 上的控制信息可以由蓝牙模块的 LMP实体通过 LMP协议数据单元( Protocol Data Unit, 简称为 PDU ) 来发送。 基于上述规范, 在预设目标值为蓝牙模块 的最大收发功率的情况下, 在蓝牙无线通信链路建立成功后, 内部可视通信 的发起方发送相应的 PDU到接收方, 请求增力 p功率, 直到接收方达到最大 功率为止; 然后, 接收方发送相应的 PDU到发送方, 请求增力 p功率, 直到 发送方达到最大功率。 在这之后, 即可以进行可视通信 PDU的传输。 在内 部可视通信进行过程中, 收发双方的功率一直维持在最大值, 以保证通信的 正常进行。 在具体实施中, 可以复用现有的网络协议及其架构来进行整个内部可视 通信过程,为此可以新增一个可视呼叫控制( Video Call Control,简称为 VCC ) 实体来控制整个的可视通信过程, 其中: 可视通信的发起方终端和接收方终端通过各自的蓝牙模块建立起发起方 终端和接收方终端之间的蓝牙无线通信链路包括: 发起方终端的蓝牙模块中 的 VCC实体通过接口接收到发起方终端的应用发来的建立蓝牙无线通信链 路的指令; VCC实体通过接口控制基带层启动查询、 寻呼、 查询扫描以及寻 呼扫描的过程; VCC实体通过接口控制 LMP实体建立和发布与接收方终端 之间的蓝牙无线通信链路。 发起方终端和接收方终端之间通过建立的蓝牙无线通信链路传输多媒体 信息, 进行可视通信包括: VCC实体使用语音和视频同步控制接口控制内部 可视通路的连接, 应用在建立的蓝牙无线通信链路上, 通过内部可视通路与 接收方终端的应用之间传输多媒体信息, 进行可视通信。 在发起方终端和接收方终端之间通过建立的蓝牙无线通信链路传输多媒 体信息之前, 述 VCC实体将蓝牙无线通信链路建立成功的消息反馈给发起 方终端的应用; 发起方终端的应用和接收方终端的应用之间可以釆用 H.324 信令进行对等层多路复用信息交互和逻辑信道通信。 在进行可视通信之后, 发起方终端和接收方终端之一可以向对端发起可视通信结束命令; 结束时, 可以先拆除发起方终端和接收方终端之间的逻辑信道, 再拆除发起方终端和 接收方终端之间蓝牙无线通信链路。 在目前的规范中, 蓝牙支持 2种不同类型的链路: 同步有连接
( synchronous connection-oriented, 简称为 SCO )链路和异步无连接
( asynchronous connection-less, 简称为 ACL )„ 其中, SCO是面向连接的同 步链路, 2台设备利用保留带宽进行同步通信, 类似于电路交换。 SCO分组 主要用于实时性业务, 信息传送速率达到 64 kbit/s。 无论主从设备均可以建 立多达 3条的 SCO链路。 ACL是面向无连接的异步链路, 主设备可以在非 SCO链路预留时隙中对任意从设备在每时隙的基础上建立 ACL链路。 ACL 的非对称连接正向速率 72.164 kbit/s, 反向应答速率 57.664 kbit/s; 对称连接 速率为 432.664 kbit/s„ 实时传输的视频信号对链路的选择有着比较高的要求: 1.传输速率要有 一定的保证; 2.不能有太大的延时。 ACL方式虽然传输速率较高, 但是由于 其类似与分组传输的特性和错误重传机制, 可能导致比较大的延时。 而 SCO 方式虽然只有 64的传输速率, 但是对于经 H.263压缩后的多媒体信息而言, 已经足够使用。 而且, SCO方式的同步特性比较符合实时信号的传输要求, 因此可以釆用 SCO方式进行多媒体信息的传输。 图 2是根据本发明实施例的终端的结构框图,该终端包括:蓝牙模块 22 , 设置为与对端的蓝牙模块 22交互, 建立起该终端和对端之间的蓝牙无线通 信链路; 可视通信模块 24 , 设置为和对端之间通过建立的蓝牙无线通信链路 传输多媒体信息, 进行可视通信。 图 3是才艮据本发明实施例的终端的优选结构框图, 该终端还可以包括: 控制收发模块 32 , 设置为向对端发送用于指示将对端的蓝牙模块 22的收发 功率调整到预设目标值的第一控制信息, 以及接收来自对端的用于指示将本 终端的蓝牙模块 22的收发功率调整到预设目标值的第二控制信息; 可视通 信模块 24设置为釆用第二控制信息指示的预设目标值作为本终端的蓝牙模 块的当前收发功率, 通过建立的蓝牙无线通信链路传输多媒体信息, 进行可 视通信。 以下描述的实施例 1-3 , 综合了上述多个优选实施例的技术方案。 实施例 1 图 4是根据实施例 1的基于蓝牙实现内部可视通信的协议框架图。 具体 说明如下:
H.223 : 主要负责视频逻辑信道、 语音逻辑信道、 信令逻辑信道、 数据逻 辑信道的复用、 解复用。 它保持一个信道复用表, 并且传给对端。 它将音频 视频控制数据流复用为单比特数据流, 并将收到的单比特数据流再解复用为 各种各样的多媒体流。 另外, 它执行逻辑帧、 编号顺序、 依靠中继的检错、 纠错, 这些适用于每一种媒体类型。
H.245 : 可视电话信令控制, 主要完成和远方用户相互交换能力信息、 主 从决定、 视频质量控制、 信道复用表传送等。
H.324: 控制和协调 H.223、 H.245协议, 实现上层应用发起的呼叫 下面对图 4中标识的六个接口故如下简要陈述: 接口 A, 可视呼叫控制实体使用此语音和视频同步控制接口以连接和断 开内部通路。 接口 B, 用于传输面向连接 (点对点) L2CAP信道上的 TCS信息。 接口 C, 可视呼叫控制实体使用此接口来直接控制链路管理器以建立和 发布 SCO链路。 接口 D, 可视呼叫控制实体使用此接口控制 LC/基带以直接启动查询、 寻呼、 查询扫描和寻呼扫描过程。 接口 E, 可视呼叫应用使用此接口通知可视呼叫控制实体进行通信链路 的建立。 可视呼叫控制实体 VCC( Video Call Control )与 H.223、 H.245以及 H.324 协议之间是上层协议和下层传输实体的关系。 它的作用是用来建立蓝牙无线 承载, 用来传输 H.324协议数据包, 该数据包包括视频、 音频、 数据和多媒 体信令。 用户要拨打一个基于蓝牙的内部可视电话, 首先要通过 VCC建立 蓝牙无线链路, 然后才能建立多媒体信令, 多媒体信令交互成功后, 才能进 行视频传输。 具体交互过程如下:
1. 用户拨打内部可视电话, 该上层应用通过接口 E发送指令给 VCC, 指示 VCC建立蓝牙链路;
2. VCC通过接口 D, 控制基带层启动查询、 寻呼、 查询扫描和寻呼扫描 过程; 3. 在完成上述过程之后, VCC通过接口 C, 直接控制链路管理器以建立 和发布 SCO链路, 链路建立完成之后, VCC将链路建立成功的消息反馈给 上层应用, 表示可以进行多媒体控制信令的交互;
4. 作为多媒体控制信令交互的结果, VCC使用接口 A连接内部可视通 路; 在内部可视通信结束后, VCC使用接口 A断开内部可视通路。 实施例 2 基于蓝牙实现可视内部通信的过程中, 通过图 4所示的蓝牙无线协议栈 通信实体之间信令的交互, 建立起通信链路, 在通信链路建立起来后, 开始 执行 H.245信令过程: 端到端复用级别交换和打开逻辑信道, 进行多媒体信 息的传输。 图 5是根据实施例 2的基于蓝牙的内部可视通信的实现流程。 具 体描述如下: 步骤 S502, 用户 A (记为 UE ( A ) ) 给自己的蓝牙模块 ( BT ( A ) ) 发 送连接请求 ( connection request, 简称为 Conn Req ) 命令, 准备建立与用户 B (记为 UE ( B ) ) 的内部可视通信的链路。 步骤 S504, 蓝牙模块之间进行信令的交互, 以建立起蓝牙链路和配置蓝 牙链路。 如果蓝牙链路建立和配置成功, 蓝牙模块 A封装上层的连接请求 ( connection request ) PDU, 并发给蓝牙模块 B (记为 BT ( B ) )。 蓝牙模块 B 将该 PDU传递给上层, 并将上层的连接接受 ( connection accept ) PDU传递 给蓝牙模块 A。 蓝牙模块 A将该 PDU传递给上层, 标识着内部可视通信链 路建立成功。 步骤 S506, 在蓝牙无线信道连接建立后, 蓝牙模块 A发送 LMP增加功 率请求( LMP_incr_power_req ) PDU到蓝牙模块 B, 请求蓝牙模块 B增强功 率, 该过程一直进行, 直到收到蓝牙模块 B发送的 LMP最大功率
( LMP max_power ) PDU, 表示已经使用最大功率; 蓝牙模块 B也进行相应 的动作, 直到蓝牙模块 A使用最大功率。 步骤 S508, 在通信双方的功率确定后, 两个终端开始利用 H.324信令进 行对等层多路复用信息交互和逻辑信道通信, 具体信令流程如图 5所示, 首 先是双方通过终端能力设置 ( Terminal Capability Set ) 消息交换双方的终端 系统能力; 然后是通过发送主从确定( Master Slave Determination )消息交换 随机数, 确定主从; 之后, 使用打开逻辑信道 (Open Logical Channel )信令 打开逻辑信道, 打开逻辑信道后可以发送复用表, 只有在复用表定义成功以 后才能在该逻辑信道上开始实际的数据传输。 蓝牙模块之间的交互的 PDU, 是对上述信令的封装和解封装。 在 H.324信令交互完毕后, 开始进行内部可 视通信。 步 4聚 S510, 用户 A发出内部可视通信结束命令 会话结束 ( End session )。首先进行高层逻辑通信信道的拆除,然后进行蓝牙无线链路的拆除, 标识内部可视通信正常结束。 实施例 3 图 6是根据实施例 3的通过蓝牙实现内部可视通信的流程图, 该过程包 括: 步骤 S602, 用户 A发起与用户 B进行内部可视通信。 步骤 S604, 上层应用给蓝牙模块发送建立连接的命令, 蓝牙无线链路建 立成功。 步骤 S606, 基于蓝牙无线链路的成功建立, 进行 H.324信令的交互, 以 控制和协调 H.223、 H.245协议, 实现上层应用发起的呼叫。 步骤 S608, 用户 A与 B进行内部可视通信。 步 4聚 S610, 用户 A (或用户 B ) 提出结束内部可视通信。 步骤 S612, 首先进行上层逻辑链路的拆除, 完毕后拆除蓝牙无线链路, 通信结束。 从以上的描述中, 可以看出, 以上实施例提供的方案可以完成在蓝牙无 线通信链路上实现可视通话 PDU的传输, 使得使用蓝牙手机的用户能够直 接通过蓝牙进行内部可视通信。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而可以将它们存储在存储装置中由计算装置来执行, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的^"神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种可视通信实现方法, 包括:
可视通信的发起方终端和接收方终端通过各自的蓝牙模块建立起 所述发起方终端和所述接收方终端之间的蓝牙无线通信链路;
所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无线 通信链路传输多媒体信息, 进行可视通信。
2. 根据权利要求 1所述的方法, 其中,
在所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无 线通信链路传输多媒体信息之前, 还包括: 所述发起方终端和所述接 收方终端之间互发控制信息, 指示对端将其自身的蓝牙模块的收发功 率调整到预设目标值;
所述发起方终端和所述接收方终端之间通过建立的所述蓝牙无线 通信链路传输多媒体信息包括: 所述发起方终端和所述接收方终端分 别釆用接收到的控制信息指示的预设目标值作为蓝牙模块的当前收发 功率,通过建立的所述蓝牙无线通信链路进行所述多媒体信息的传输。
3. 居权利要求 2所述的方法, 其中, 所述发起方终端和所述接收方终 端之间互发控制信息, 指示对方将其自身的蓝牙模块的收发功率调整 到预设目标值包括:
所述发起方终端向所述接收方终端发送第一控制信息, 指示所述 接收方终端将所述接收方终端的蓝牙模块的收发功率调整到所述第一 控制信息指示的预设目标值;
所述接收方终端在完成将所述接收方终端的蓝牙模块的收发功率 调整至所述第一控制信息指示的预设目标值时, 向所述发起方终端发 送第二控制信息, 指示所述发起方终端将所述发起方终端的蓝牙模块 的收发功率调整到所述第二控制信息指示的预设目标值。
4. 根据权利要求 2或 3所述的方法, 其中, 所述控制信息指示的预设目 标值为接收到所述控制信息的终端的蓝牙模块的最大收发功率。
5. 根据权利要求 2或 3所述的方法, 其中, 所述控制信息由所述蓝牙模 块的链路管理协议 LMP实体通过 LMP协议数据单元 PDU来发送。
6. 根据权利要求 1所述的方法, 其中, 可视通信的发起方终端和接收方 终端通过各自的蓝牙模块建立起所述发起方终端和所述接收方终端之 间的蓝牙无线通信链路包括:
所述发起方终端的蓝牙模块中的可视呼叫控制 VCC实体通过接 口接收到所述发起方终端的应用发来的建立所述蓝牙无线通信链路的 指令;
所述 VCC实体通过接口控制基带层启动查询、 寻呼、 查询扫描以 及寻呼扫描的过程;
所述 VCC实体通过接口控制 LMP实体建立和发布与所述接收方 终端之间的所述蓝牙无线通信链路。
7. 居权利要求 6所述的方法, 其中, 所述发起方终端和所述接收方终 端之间通过建立的所述蓝牙无线通信链路传输多媒体信息, 进行可视 通信包括:
所述 VCC实体使用语音和视频同步控制接口控制内部可视通路 的连接, 所述应用在建立的所述蓝牙无线通信链路上, 通过所述内部 可视通路与所述接收方终端的应用之间传输多媒体信息, 进行可视通 信。
8. 根据权利要求 6所述的方法, 其中, 在所述发起方终端和所述接收方 终端之间通过建立的所述蓝牙无线通信链路传输多媒体信息之前, 还 包括:
所述 VCC实体将所述蓝牙无线通信链路建立成功的消息反馈给 所述发起方终端的应用;
所述发起方终端的应用和所述接收方终端的应用之间釆用 H.324 信令进行对等层多路复用信息交互和逻辑信道通信。
9. 根据权利要求 8所述的方法, 其中, 在进行可视通信之后, 还包括: 所述发起方终端和所述接收方终端之一向对端发起可视通信结束 命令; 拆除所述发起方终端和所述接收方终端之间的所述逻辑信道; 拆除所述发起方终端和所述接收方终端之间蓝牙无线通信链路。
10. 根据权利要求 1-3、 6-9中任一项所述的方法, 其中, 所述蓝牙无线通 信链路为同步有连接 SCO链路。
11. 一种终端, 包括:
蓝牙模块, 设置为与对端的蓝牙模块交互, 建立起该终端和所述 对端之间的蓝牙无线通信链路;
可视通信模块, 设置为和所述对端之间通过建立的所述蓝牙无线 通信链路传输多媒体信息, 进行可视通信。
12. 根据权利要求 11所述的终端, 其中,
所述终端还包括: 控制收发模块, 设置为向所述对端发送用于指 示将所述对端的蓝牙模块的收发功率调整到预设目标值的第一控制信 息, 以及接收来自所述对端的用于指示将所述终端的蓝牙模块的收发 功率调整到预设目标值的第二控制信息;
所述可视通信模块设置为釆用所述第二控制信息指示的预设目标 值作为所述终端的蓝牙模块的当前收发功率, 通过建立的所述蓝牙无 线通信链路传输所述多媒体信息, 进行可视通信。
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