[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN104660423A - Group call combined conference realization method, device and system - Google Patents

Group call combined conference realization method, device and system Download PDF

Info

Publication number
CN104660423A
CN104660423A CN201310598578.7A CN201310598578A CN104660423A CN 104660423 A CN104660423 A CN 104660423A CN 201310598578 A CN201310598578 A CN 201310598578A CN 104660423 A CN104660423 A CN 104660423A
Authority
CN
China
Prior art keywords
user
conference
group
users
dynamic group
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201310598578.7A
Other languages
Chinese (zh)
Inventor
刘达
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN XINWEI TELECOMM TECHNOLOGY Co Ltd
Beijing Xinwei Telecom Technology Inc
Original Assignee
SHENZHEN XINWEI TELECOMM TECHNOLOGY Co Ltd
Beijing Xinwei Telecom Technology Inc
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 SHENZHEN XINWEI TELECOMM TECHNOLOGY Co Ltd, Beijing Xinwei Telecom Technology Inc filed Critical SHENZHEN XINWEI TELECOMM TECHNOLOGY Co Ltd
Priority to CN201310598578.7A priority Critical patent/CN104660423A/en
Publication of CN104660423A publication Critical patent/CN104660423A/en
Pending legal-status Critical Current

Links

Landscapes

  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention provides a group call combined conference realization method. The method comprises the following steps: applying for a conference resource, and adding at least one dynamic group in the conference resource; defining first users and second users in the conference; adding at least one first user in the conference resource, and adding one or more second users in the dynamic group; initiating conference call application to enable the first user to enter the conference, initiating the dynamic group into the group call, and enabling the second users to enter the conference in which the dynamic group exists through the group call; receiving a user voice package, from the first user and/or the dynamic group, in the conference; processing the voice package, sending the processed voice package to all first users entering the conference and the dynamic group, and using the dynamic group to send the voice package to all of the send users.

Description

Group calling-combined conference implementation method, device and system
Technical Field
The present invention relates to a network communication method, and in particular, to a method, an apparatus, and a system for implementing a conference in which a conference and a group call (group call) are combined.
Background
The telephone conference is a service of connecting more than two multi-party telephone terminals through a telephone network to realize real-time two-way conversation among multiple points. The user can use the fixed telephone, the mobile telephone or the special conference terminal to dial the access number of the teleconference service, and the convenience brought by the teleconference is enjoyed. Compared with the traditional face-to-face conference of users, the teleconference service improves the conference efficiency and reduces the cost.
In existing private network systems, the implementation of a conference requires a conference to be booked, and the booking information may include, but is not limited to: conference number, conference time, number of participants, conference duration, etc., and then individual participating users of the conference are called in, or the conference number is actively called by a user to request to join the conference. After the conference user successfully joins the conference, the voice data packet can be sent to the system in a conversation mode, the conference processing module receives the voice packet of each conference user, encodes the voice information (for example, G.729-G.711), then performs sound mixing processing, and sends the sound-mixed voice packet to each conference user.
For the voice coding processing, there are two common methods of the existing conference system, namely, coding processing is performed through a DSP; and secondly, coding by using software. However, no matter what coding process is adopted for the voice, in the traditional conference mode, the voice quality is correspondingly reduced along with the increase of conference users. The overhead of audio encoding and decoding of the whole system is increased greatly, and the performance of the system may not meet the requirements of call quality and real-time performance. In addition, the traditional conference mode also lacks flexibility in controlling conference users and cannot well control the user conversation attributes.
Disclosure of Invention
In view of the problems existing in the prior art, the invention provides a new conference implementation method to implement attribute control on the conference user call, improve the voice quality and reduce the system overhead.
In order to solve the technical problem, the conference implementation method combining group calling provided by the invention comprises the following steps:
applying for meeting resources and adding at least one dynamic group in the meeting resources; defining a first user and a second user in a conference; adding at least one first user to the conference resource and more than one second user to the dynamic group; initiating a conference call application to enable a first user to enter a conference and initiate a group call to the dynamic group, and enabling a second user to enter the conference in which the dynamic group is located through the group call; receiving a voice packet of a conference user, wherein the voice packet is from a first user and/or the dynamic group; and processing the voice packet, sending the processed voice packet to all the first users and the dynamic group entering the conference, and sending the processed voice packet to all the second users by the dynamic group.
Preferably, in each dynamic group, each user can receive the voice packet, and only one user can send the voice packet. Further, in each dynamic group, the second user capable of sending the voice packet is in a full-duplex mode, and the other users are in a half-duplex mode. If the second user in the half-duplex mode needs to send the voice packet, after the speech right is successfully applied, the second user is set to be in the full-duplex mode capable of sending the voice packet, and meanwhile, the other second users are set to be in the half-duplex mode.
Preferably, the conference resource comprises a conference number, the user is assigned a user number, and the dynamic group is assigned a group number. The further entering of the first user into the conference specifically includes: initiating a conference call application to a user number of a first user, and allowing the first user to accept the conference call application and enter a conference; or the first user actively calls the conference number to enter the conference. The second user entering the conference specifically includes: initiating a group call to the group number, and allowing the second user to accept the group call so as to enter a conference in which the dynamic group is located; alternatively, the second user actively dials the group number into the dynamic group, thereby entering the conference.
Preferably, the first user has a full duplex mode, and only one second user in the dynamic group has the full duplex mode, and the remaining second users are in a half duplex mode.
Preferably, the processing the voice packet sequentially includes: speech coding, speech decoding and sound mixing processing.
Preferably, the first user and the second user are defined according to the service requirement and/or the user authority of the conference. Further, the user rights include listening rights and/or speaking rights. The traffic demands include duplex traffic demands and half-duplex traffic demands.
The invention also provides a scheduling device for realizing the conference, which adds conference users into the conference to realize voice communication, and the system comprises the following modules: the resource application module is used for applying for meeting resources and adding at least one dynamic group in the meeting resources; a user joining module for adding at least one first user to the conference resource and adding more than one second user to the dynamic group; the initiating conference call module is used for initiating a conference call to a first user and initiating a group call to the dynamic group, so that the first user and a second user enter a conference respectively; a receiving module, configured to receive a voice packet of a conference user, where the voice packet is from a first user and/or the dynamic group; and the processing and sending module is used for processing the voice packet, sending the processed voice packet to all the first users entering the conference and the dynamic group, and further sending the processed voice packet to all the second users by the dynamic group.
Preferably, all users in each dynamic group can receive voice packets, and only one user can send voice packets.
Preferably, the conference resource includes a conference number, wherein the dynamic group includes a group number, and the module for initiating the conference call further includes a group call module, configured to initiate a group call to the dynamic group number, and the second user accepts the group call to enter a conference in which the dynamic group is located; and a notification module for notifying the second user to actively dial the group number into the dynamic group, thereby entering the conference.
Preferably, only one user in the dynamic group can send the voice packet, and the dynamic group has a full-duplex mode, and the other users are in a half-duplex mode, and the scheduling system further includes a mode setting module, configured to set a second user in the half-duplex mode as the full-duplex mode capable of sending the voice packet, and set the other second users as the half-duplex mode at the same time, when the second user applies for the talk right successfully.
Preferably, the apparatus further comprises a user definition module, configured to define the first user and the second user according to the service requirement and/or the user authority.
The invention also provides a conference scheduling system used for the conference implementation method, the conference scheduling system comprises the scheduling device and one or more user terminals, and the users use the terminals to carry out voice communication.
Compared with the prior art, the conference implementation method provided by the invention can not only meet the traditional conference function, but also realize the conference with at least the following advantages: firstly, the number of conference users is greatly improved, and secondly, the overhead of the system is reduced; furthermore, the method not only can flexibly control the conversation attribute of the conference user, but also can ensure that the voice quality of the conference is greatly improved.
Drawings
Fig. 1 is a conference control flow diagram according to an embodiment of the present invention.
Fig. 2 is a signaling flowchart of a conference implementation process in the private network scheduling system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a transmission flow of voice packets in a conference system according to an embodiment of the present invention.
Detailed Description
For a further understanding of the invention, specific embodiments of the method of the invention will be described in detail below with reference to the accompanying drawings. It is understood by those skilled in the art that the drawings in the following description are merely exemplary of the invention, and that other related matters can be obtained by those skilled in the art without inventive exercise.
The invention provides a group calling combined conference realization method, which utilizes a scheduling system to add conference users into a conference to realize voice communication and comprises the following steps: applying for meeting resources and adding at least one dynamic group in the meeting resources; defining a first user and a second user in a conference; adding at least one first user to the conference resource and more than one second user to the group; initiating a conference call application to enable a first user to enter a conference and initiate a group call to the group, and enabling a second user to enter the conference in which the group is located through the group call; receiving a voice packet of a conference user, the voice packet being from a first user and/or the group; and processing the voice packet, sending the processed voice packet to all the first users and the group entering the conference, and further sending the voice packet to all the second users by the group.
Specific implementations of the present invention will be described below with reference to specific embodiments:
in the conference implementation method disclosed by the invention, conference users are divided into a full duplex mode and a half duplex mode (listening mode), and the users directly controlled by the conference are in the full duplex mode, wherein group calling is equivalent to one user of the conference. The users connected with the group call are in full duplex mode for one user and in half duplex mode (listening mode) for the other users.
When the users in the group need to talk, the method can be realized by applying the speaking right, and the user who grasps the speaking right is set as a full-duplex user.
Example 1
Taking mcwil system as an example, fig. 2 is a signaling flow chart of a conference implementation process in a private network scheduling system according to an embodiment of the present invention. The method comprises the following steps:
101. adding a dynamic group (the group number is 3001) on a dispatching desk, and applying for a conference resource (the conference number is 8001);
102. conference users are divided into two categories: users that need full duplex and users that only need to listen, i.e., half duplex users. The two types of users are respectively distributed with user numbers (such as A, B and C) and group user numbers (such as group user 1 and group user 2) on the dispatching desk;
the user classification herein can be flexibly performed according to user rights or service attributes or other factors (e.g., for reasons such as convenience in managing scheduling). Similarly, the number of groups may be set to one or more according to actual conditions.
103. Adding full-duplex users in the conference to conference resources, adding half-duplex users to a dynamic group, and simultaneously adding the group number 3001 of the dynamic group to the full-duplex users;
104. after a conference is reserved, initiating a conference call application to a dispatching system, receiving the conference call application by the dispatching system, calling users A, B and C needing full duplex into the conference, or calling a conference number 8001 by the users actively to enter the conference, for example, a conference user who does not respond to the initiated call;
105. for the conference users who only need to answer, the scheduling system initiates group calling, and the users enter the group by receiving the group calling, or the users actively dial the group number 3001 to enter the group;
106. when a user speaks, please refer to fig. 3, the dispatch system receives voice packets of full duplex users, such as from users a, B, C or dynamic group, and performs voice encoding/decoding and voice mixing processing on the voice packets of these users, and sends the voice packets after voice mixing to the full duplex users to realize listening, if a group user member (e.g. group user 2) needs to speak, since only one of the users in the group is full duplex, and the other users are half duplex, it needs to apply for speaking right first, and then performs speaking processing after applying successfully.
Because the present invention focuses on combining group calling in a conference, the above example mainly describes the operation process of group users in detail, so the process of traditional single user entering a conference, sending and receiving voice is not described again, which has become the common prior art in the field. It should be understood by those skilled in the art that the conference implementation method of the present invention is also applicable to a case where various users participate in a conference at the same time. Those skilled in the art will also appreciate that the method of the present invention is not limited to one group and may allow multiple groups to join a conference together, depending on the nature of the group or convenient user management. Such modifications and variations are intended to be within the scope of the present invention.
Example 2
The invention also provides a scheduling device for realizing the conference, which adds conference users into the conference to realize voice communication, and the system comprises the following modules: the resource application module is used for applying for meeting resources and adding at least one dynamic group in the meeting resources; a user joining module for adding at least one first user to the conference resource and adding more than one second user to the group; the initiating conference call module is used for initiating a conference call to a first user and initiating a group call to the group so as to enable the first user and a second user to enter a conference respectively; a receiving module, configured to receive a voice packet of a conference user, where the voice packet is from a first user and/or the group; and the processing and sending module is used for processing the voice packet, sending the processed voice packet to all the first users and the group entering the conference, and further sending the voice packet to all the second users by the group.
Preferably, all users in each group can receive voice packets and only one user can send voice packets.
Preferably, the conference resource includes a conference number, wherein the group includes a group number, and the module for initiating a conference call further includes a group call module, configured to initiate a group call to the group number, and a second user accepts the group call to enter a conference in which the group is located; and a notification module for notifying the second user to actively dial the group number into the group, thereby entering the conference.
Preferably, only one user in the group can send a voice packet, and the voice packet has a full-duplex mode, and the other users are in a half-duplex mode, and the scheduling system further includes a mode setting module, configured to set a second user in the half-duplex mode as the full-duplex mode capable of sending the voice packet, and set the other second users as the half-duplex mode at the same time, when the second user applies for the talk right successfully.
Preferably, the apparatus may further include a definition module, configured to define the first user and the second user according to the service requirement and/or the user right.
Example 3
The invention also provides a conference scheduling system used for the conference implementation method, the conference scheduling system comprises the scheduling device and one or more user terminals, and the users use the terminals to carry out voice communication.
In summary, with the present invention, a special user is added on the basis of the traditional single conference user, and the special user is a user group and has a group number (dynamic recombination number). The system needs to implement the function of group calling correspondingly. The group needs special treatment, that is, if the group is entered into the conference, the group receives the voice packet sent from the conference and sends the voice packet of the conference to all the users in the group. And, the voice packets received by the group from the users in the group are sent to the conference. Because of the group setting, the conversation attribute of the users in the group is limited and managed by the group, only one user can be used as the group user to send the voice packet outwards, the phenomenon that the conversation data volume is too large due to the fact that a single user is not controlled is avoided, and the speaking users in the group can also be adjusted according to the application. Therefore, the method and the device realize flexible call attribute control on the conference users.
Compared with the prior art, the novel conference mode allowing group calling can not only meet the functions of the traditional conference, but also greatly improve the number of conference support users, reduce the overhead of the system, flexibly control the conversation attribute of the conference users and ensure the voice quality of the conference.
Embodiments of the invention may be implemented in hardware, firmware, software, or any combination thereof. The software is preferably implemented as an application program tangibly embodied on a program storage unit or tangible computer readable medium, consisting of components or certain devices and/or combinations of devices. The application program may be uploaded to, and executed by, a computer or server comprising any suitable architecture.
The disclosure of the present invention is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (18)

1. A method for realizing conference combined with group calling, the method uses scheduling system to join conference user into conference to realize voice communication, characterized by comprising the following steps:
applying for meeting resources and adding at least one dynamic group in the meeting resources;
defining a first user and a second user in a conference;
adding at least one first user to the conference resource and more than one second user to the dynamic group;
initiating a conference call application to enable a first user to enter a conference and initiate a group call to the dynamic group, and enabling a second user to enter the conference in which the dynamic group is located through the group call;
receiving a voice packet of a conference user, wherein the voice packet is from a first user and/or the dynamic group;
and processing the voice packet, sending the processed voice packet to all the first users and the dynamic group entering the conference, and sending the processed voice packet to all the second users by the dynamic group.
2. The method of claim 1, wherein each user receives voice packets and only one user is able to send voice packets in each dynamic group.
3. The method of claim 2, wherein in each dynamic group, the second user capable of sending voice packets is in full-duplex mode, and the remaining users are in half-duplex mode.
4. The method according to claim 3, wherein in the dynamic group, if the second user in half-duplex mode needs to send voice packet, after applying for the talk right successfully, it is set to full-duplex mode capable of sending voice packet, and the other second users are set to half-duplex mode.
5. The method of claim 1, wherein the conference resource comprises a conference number, wherein the user is assigned a user number, and wherein the dynamic group is assigned a group number.
6. The method of claim 5, wherein the first user entering the conference specifically comprises:
initiating a conference call application to a user number of a first user, and allowing the first user to accept the conference call application and enter a conference; or,
the first user actively calls the conference number to enter the conference.
7. The method according to claim 5 or 6, wherein the second user entering the conference specifically comprises:
initiating a group call to the group number, and allowing the second user to accept the group call so as to enter a conference in which the dynamic group is located; or,
the second user actively dials the group number into the dynamic group, thereby entering the conference.
8. The method of claim 1, wherein the first user has a full-duplex mode and only one second user in the dynamic group has a full-duplex mode, and wherein the remaining second users are in a half-duplex mode.
9. The method of claim 1, wherein processing the voice packet comprises, in order: speech coding, speech decoding and sound mixing processing.
10. The method of claim 1, wherein the first user and the second user are defined according to service requirements and/or user rights of the conference.
11. The method of claim 10, wherein the user rights comprise listening rights and/or speaking rights.
12. The method of claim 10 or 11, wherein the traffic demand comprises duplex traffic demand and half-duplex traffic demand.
13. A scheduling device for realizing a conference, which joins conference users into the conference to realize voice call, is characterized in that the system comprises the following modules:
the resource application module is used for applying for meeting resources and adding at least one dynamic group in the meeting resources;
a user joining module for adding at least one first user to the conference resource and adding more than one second user to the dynamic group;
the initiating conference call module is used for initiating a conference call to a first user and initiating a group call to the dynamic group, so that the first user and a second user enter a conference respectively;
a receiving module, configured to receive a voice packet of a conference user, where the voice packet is from a first user and/or the dynamic group;
and the processing and sending module is used for processing the voice packet, sending the processed voice packet to all the first users entering the conference and the dynamic group, and further sending the processed voice packet to all the second users by the dynamic group.
14. The scheduler of claim 13, wherein all users in each dynamic group can receive voice packets, and only one user can send voice packets.
15. The scheduling apparatus of claim 13 wherein the conference resource comprises a conference number, wherein the dynamic group comprises a group number, and the module for initiating the conference call further comprises a group call module for initiating a group call to the dynamic group number, and the second user accepts the group call into a conference in which the dynamic group is located; and a notification module for notifying the second user to actively dial the group number into the dynamic group, thereby entering the conference.
16. The scheduler of claim 13, wherein only one user in the dynamic group is able to transmit voice packets and has a full-duplex mode, and the other users are in a half-duplex mode, and the scheduler further comprises a mode setting module configured to set a second user in the half-duplex mode to the full-duplex mode capable of transmitting voice packets when applying for the right to talk successfully, and set the other second users to the half-duplex mode.
17. The scheduling device according to any one of claims 13 to 16, wherein the device further comprises a user definition module for defining the first user and the second user according to the service requirement and/or the user authority.
18. A conference scheduling system for use in the method of claim 1, the conference scheduling system comprising the scheduling apparatus of any one of claims 13 to 17 and one or more user terminals with which the users are engaged in voice calls.
CN201310598578.7A 2013-11-25 2013-11-25 Group call combined conference realization method, device and system Pending CN104660423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310598578.7A CN104660423A (en) 2013-11-25 2013-11-25 Group call combined conference realization method, device and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310598578.7A CN104660423A (en) 2013-11-25 2013-11-25 Group call combined conference realization method, device and system

Publications (1)

Publication Number Publication Date
CN104660423A true CN104660423A (en) 2015-05-27

Family

ID=53251159

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310598578.7A Pending CN104660423A (en) 2013-11-25 2013-11-25 Group call combined conference realization method, device and system

Country Status (1)

Country Link
CN (1) CN104660423A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110098943A (en) * 2019-04-19 2019-08-06 深圳市晨讯物联科技有限公司 A kind of device of full duplex conference model

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1510898A (en) * 2002-12-23 2004-07-07 华为技术有限公司 Mixed speech processing method
CN1909690A (en) * 2006-09-01 2007-02-07 西安大唐电信有限公司 Method for realizing terminal group-calling of dispatching machine
CN101018419A (en) * 2007-03-05 2007-08-15 华为技术有限公司 Scheduling method and system of the multi-party call service
CN101119533A (en) * 2006-08-02 2008-02-06 中兴通讯股份有限公司 Method for organizing telephone conference
CN101163028A (en) * 2007-11-08 2008-04-16 中兴通讯股份有限公司 Method of implementing soft switch traffic console session function
CN101631173A (en) * 2009-08-10 2010-01-20 北京佳讯飞鸿电气股份有限公司 Method for supporting simultaneous outgoing calls of a large number of users for dispatching console

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1510898A (en) * 2002-12-23 2004-07-07 华为技术有限公司 Mixed speech processing method
CN101119533A (en) * 2006-08-02 2008-02-06 中兴通讯股份有限公司 Method for organizing telephone conference
CN1909690A (en) * 2006-09-01 2007-02-07 西安大唐电信有限公司 Method for realizing terminal group-calling of dispatching machine
CN101018419A (en) * 2007-03-05 2007-08-15 华为技术有限公司 Scheduling method and system of the multi-party call service
CN101163028A (en) * 2007-11-08 2008-04-16 中兴通讯股份有限公司 Method of implementing soft switch traffic console session function
CN101631173A (en) * 2009-08-10 2010-01-20 北京佳讯飞鸿电气股份有限公司 Method for supporting simultaneous outgoing calls of a large number of users for dispatching console

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110098943A (en) * 2019-04-19 2019-08-06 深圳市晨讯物联科技有限公司 A kind of device of full duplex conference model

Similar Documents

Publication Publication Date Title
US9923729B2 (en) System for delivering unified conferences in light of prohibition of toll bypass
CN101778181B (en) Method and system for mobile terminal to achieve three-part call of videophone
CN103384235B (en) Data are presented during multi-conference method, server and system
CN103475499B (en) A kind of speech talkback method and system based on network telephone conference
US7983199B1 (en) Voice over internet protocol push-to-talk communication system
CN105323536A (en) Attendee private chat method and device in television conference
CN103780403B (en) The processing method of videoconference, device and system
CN105376516A (en) Mobile video conference system and implementing method thereof
CN102625078A (en) Teleconference control method, terminal device, MCU (Multipoint Control Unit) and video system
CN101771954B (en) Method for realizing conference function in dispatching subsystem of wireless clustered system
CN107666396B (en) Multi-terminal conference processing method and device
CN101860547A (en) Method, device and system for controlling group call connection or broadcast call connection
CN201869372U (en) Triple-play mobile trunking communication system
CN104427290A (en) Processing method and processing system for audio/video data
CN103813032B (en) A kind of command scheduling is attended a banquet voice management system
CN107241113A (en) Digital Clustering intercommunication method, system, Digital Clustering intercom and storage medium
CN111294325B (en) Cluster communication method, service platform and storage medium
CN104660423A (en) Group call combined conference realization method, device and system
CN100493123C (en) Teleconference system and controlling method
CN107483756B (en) Voice call processing method and system
CN101340646B (en) Cluster communication system and method for a scheduler to participate in multiple callings
CN103581452A (en) Method and system for carrying out teleconference through CDMA mobile terminal
CN103237139B (en) multi-party communication system and method
CN102185828B (en) Method for binding and controlling personal computer (PC) software and session initiation protocol user agent (SIP UA)
JP4644813B2 (en) Multi-party call system, call terminal and call server in multi-party call system, multi-party call method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150527

WD01 Invention patent application deemed withdrawn after publication