CN105704549A - Bandwidth control method and device - Google Patents

Bandwidth control method and device Download PDF

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Publication number
CN105704549A
CN105704549A CN201410682989.9A CN201410682989A CN105704549A CN 105704549 A CN105704549 A CN 105704549A CN 201410682989 A CN201410682989 A CN 201410682989A CN 105704549 A CN105704549 A CN 105704549A
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set top
top box
bandwidth
specified channel
user
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CN201410682989.9A
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Chinese (zh)
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杨洋
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ZTE Corp
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ZTE Corp
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Priority to CN201410682989.9A priority Critical patent/CN105704549A/en
Priority to PCT/CN2015/086160 priority patent/WO2016082576A1/en
Publication of CN105704549A publication Critical patent/CN105704549A/en
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Abstract

The invention discloses a bandwidth control method and device. The method includes the following steps that: a set-top box obtains bandwidth required by the playing of a specified channel and the residual bandwidth of a user, wherein the residual bandwidth is the difference value of the total available bandwidth of the user and total bandwidth used by other set-top boxes of the user currently, wherein the total available bandwidth is total bandwidth allocated for all the set-top boxes of the user, wherein the other set-top boxes are all the set-top boxes except the above set-top box; and when the residual bandwidth is smaller than the required bandwidth, the set-top box refuses to play the specified channel. With the bandwidth control method and device of the invention adopted, the problem of unsmooth IPTV services caused by resource competition which is further brought about by a situation that a plurality of set-top boxes use IPTV services simultaneously in the prior art can be solved, and therefore, the smoothness of IPTV services in a family can be guaranteed.

Description

Band width control method and device
Technical field
The present invention relates to the communications field, in particular to band width control method and device。
Background technology
IPTV (InternetProtocolTelevision, referred to as IPTV) it is a kind of system transmitting TV information with broadband network as medium, integrate the technology such as the Internet, multimedia, communication, there is provided to domestic consumer and include net cast, recording, program request, and the brand-new technology of the interactive services such as information browse, game on line, voice communication, long-distance education, tele-medicine, ecommerce。
Set Top Box (Set-TopBox, referred to as STB) is located in the IPTV terminal equipment in user family。Set Top Box passes through ADSL (AsymmetricDigitalSubscriberLine, referred to as ADSL), or LAN (LocalAreaNetwork, referred to as LAN) mode accesses network, user side is connected with television set, has standardized general input, output interface。Support bi-directional symmetrical or asymmetric communication service。It undertakes the automatic network information to user or from user-to-network and forwards, and transmits the media formats media format translation functions to display device。User can pass through Set Top Box and obtain related service from operator's IPTV system。
Along with the raising of quality of life and popularizing of IPTV technology, generally have multiple stage TV in the family, also require that the access of polymorphic Set Top Box simultaneously。And a general only service wire in one family, under limited band width in physical premise, multiple users use IPTV service can cause robbing resource mutually simultaneously, and IPTV media services are not smooth, and experience is bad。
For in correlation technique, multiple Set Top Boxes use IPTV service can cause robbing resource mutually simultaneously, and the slack problem of IPTV media services does not also propose effective solution。
Summary of the invention
The invention provides a kind of band width control method and device, use IPTV service can cause robbing resource mutually at least solving multiple Set Top Boxes in correlation technique, the slack problem of IPTV media services simultaneously。
According to an aspect of the present invention, provide a kind of band width control method, including: Set Top Box obtains plays specified channel desire bandwidth, and the remaining bandwidth of user, wherein, described remaining bandwidth is the difference between the total bandwidth available of described user and the presently used total bandwidth of other Set Top Box of described user, described total bandwidth available refers to the total bandwidth that all Set Top Boxes into described user distribute, wherein, other Set Top Box described is the Set Top Box in described all Set Top Boxes except described Set Top Box;When described remaining bandwidth is less than described desire bandwidth, described Set Top Box refusal plays described specified channel。
Further, described total bandwidth available obtains in the following manner: described Set Top Box obtains described total bandwidth available from electric program menu EPG。
Further, the described presently used total bandwidth of other Set Top Box obtains in the following manner: described Set Top Box obtains the bandwidth that other Set Top Box is currently used from this locality。
Further, described Set Top Box obtains from this locality before the bandwidth that other Set Top Box is currently used, including: described Set Top Box sends the first multicast message to other Set Top Box described, wherein, described first multicast message carries the IP address of the currently used bandwidth of described Set Top Box and described Set Top Box;Described Set Top Box receives the response message that other Set Top Box described sends according to described first multicast message;Described Set Top Box obtains the bandwidth of other Set Top Box described and the IP address of correspondence from described response message, and stores。
Further, described method also includes: when described remaining bandwidth is not less than described desire bandwidth, and described Set Top Box sends the second multicast message to other Set Top Box described;Described Set Top Box receives the judged result that other Set Top Box described sends according to described second multicast message, and wherein, this judged result is that other Set Top Box described is by judging whether described remaining bandwidth is not less than described desire bandwidth and obtains;When judged result is no, described Set Top Box refusal plays described specified channel, and when judged result is for being, described Set Top Box plays described specified channel。
Further, after described Set Top Box plays described specified channel, described method also includes: when described Set Top Box stops playing described specified channel, described Set Top Box discharges bandwidth used by described specified channel;Described Set Top Box is sent to other Set Top Boxes described by discharging the information of bandwidth used by described specified channel。
According to another aspect of the present invention, additionally provide a kind of bandwidth control apparatus, described device is applied to Set Top Box, described device includes: the first acquisition module, for obtaining broadcasting specified channel desire bandwidth, and the remaining bandwidth of user, wherein, described remaining bandwidth is the difference between the total bandwidth available of described user and the presently used total bandwidth of other Set Top Box of described user, described total bandwidth available refers to the total bandwidth that all Set Top Boxes into described user distribute, wherein, other Set Top Box described is the Set Top Box in described all Set Top Boxes except described Set Top Box;Playing module, for when described remaining bandwidth is less than described desire bandwidth, refusal plays described specified channel。
Further, described first acquisition module includes: acquiring unit, for obtaining the bandwidth that other Set Top Box is currently used from this locality。
Further, described device also includes: the first sending module, for sending the first multicast message to other Set Top Box described, wherein, carries the IP address of the currently used bandwidth of described Set Top Box and described Set Top Box in described first multicast message;First receiver module, for receiving the response message that other Set Top Box described sends according to described first multicast message;Second acquisition module, the IP address of bandwidth and correspondence for obtaining other Set Top Box described from described response message, and store。
Further, described device also includes: the second sending module, and for when described remaining bandwidth is not less than described desire bandwidth, described Set Top Box sends the second multicast message to other Set Top Box described;Second receiver module, for receiving the judged result that other Set Top Box described sends according to described second multicast message, wherein, this judged result is that other Set Top Box described is by judging whether described remaining bandwidth is not less than described desire bandwidth and obtains;Described playing module, is additionally operable to when judged result is no, and refusal plays described specified channel, when judged result is for being, plays described specified channel。
Pass through the present invention, adopt Set Top Box to obtain and play specified channel desire bandwidth, and the remaining bandwidth of user, wherein, remaining bandwidth is the difference between the total bandwidth available of user and the presently used total bandwidth of other Set Top Box of user, total bandwidth available refers to the total bandwidth that all Set Top Boxes into user distribute, and wherein, other Set Top Box is the Set Top Box in all Set Top Boxes except above-mentioned Set Top Box;When remaining bandwidth is less than desire bandwidth, Set Top Box refusal plays specified channel。Solve multiple Set Top Boxes in correlation technique uses IPTV service can cause robbing resource mutually simultaneously, the slack problem of IPTV media services, and then ensure that the fluency of IPTV service in family。
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention。In the accompanying drawings:
Fig. 1 is the flow chart of band width control method according to embodiments of the present invention;
Fig. 2 is the structured flowchart of bandwidth control apparatus according to embodiments of the present invention;
Fig. 3 is the structured flowchart one of bandwidth control apparatus according to embodiments of the present invention;
Fig. 4 is the structured flowchart two of bandwidth control apparatus according to embodiments of the present invention;
Fig. 5 is the structured flowchart three of bandwidth control apparatus according to embodiments of the present invention;
Fig. 6 is Set Top Box link setup sequential chart according to embodiments of the present invention;
Fig. 7 is that bandwidth flow chart is play in Set Top Box application according to embodiments of the present invention;
Fig. 8 is Set Top Box release bandwidth sequential chart according to embodiments of the present invention。
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments。It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined。
Providing a kind of band width control method in the present embodiment, Fig. 1 is the flow chart of band width control method according to embodiments of the present invention, as it is shown in figure 1, this flow process comprises the steps:
Step S102, Set Top Box obtains plays specified channel desire bandwidth, and the remaining bandwidth of user, wherein, this remaining bandwidth is the difference between the total bandwidth available of user and the presently used total bandwidth of other Set Top Box of user, total bandwidth available refers to the total bandwidth that all Set Top Boxes into user distribute, and wherein, other Set Top Box is the Set Top Box in all Set Top Boxes except this Set Top Box;
Step S104, when remaining bandwidth is less than desire bandwidth, Set Top Box refusal plays specified channel。
Pass through above-mentioned steps, compare by Set Top Box being play the remaining bandwidth of specified channel desire bandwidth and user, when remaining bandwidth is less than desire bandwidth, Set Top Box refusal plays specified channel, compared in prior art, Set Top Box can seize the bandwidth of other ongoing IPTV service when commencing play out specified channel, above-mentioned steps solves multiple Set Top Boxes in correlation technique and uses IPTV service can cause robbing resource mutually simultaneously, the slack problem of IPTV media services, and then ensure that the fluency of IPTV service in family。
The acquisition mode of total bandwidth available can have multiple, in one alternate embodiment, when Set Top Box starts and logs in electric program menu EPG, obtains total bandwidth available from electric program menu EPG。
The acquisition mode of the presently used total bandwidth of other Set Top Box can also have multiple, and in one alternate embodiment, Set Top Box obtains the bandwidth that other Set Top Box is currently used from this locality。
In above-mentioned Set Top Box, storage has the bandwidth usage of this Set Top Box and other Set Top Boxes, in one alternate embodiment, Set Top Box sends the first multicast message to other Set Top Box, wherein, first multicast message carries the IP address of the currently used bandwidth of Set Top Box and Set Top Box, Set Top Box receives the response message that other Set Top Box sends according to the first multicast message, and Set Top Box obtains the bandwidth of other Set Top Box and the IP address of correspondence from response message, and stores。
All Set Top Boxes of user all store the bandwidth usage of each Set Top Box, under normal circumstances, the bandwidth usage of each Set Top Box each Set Top Box stored should be consistent, but in order to avoid inconsistent situation occurs, in one alternate embodiment, when remaining bandwidth is not less than this desire bandwidth, Set Top Box sends the second multicast message to its Set Top Box, Set Top Box receives the judged result that other Set Top Box sends according to the second multicast message, wherein, judged result is passed through to judge whether remaining bandwidth is not less than desire bandwidth and obtains for other Set Top Box, when judged result is no, Set Top Box refusal plays specified channel, when judged result is for being, Set Top Box plays specified channel。Thus further confirming whether this specified channel to be played out。
In one alternate embodiment, when Set Top Box stops playing specified channel, bandwidth used by Set Top Box release specified channel is also sent to other Set Top Boxes by discharging the information of bandwidth used by specified channel, and other Set Top Boxes update the bandwidth usage of this Set Top Box。
Additionally providing a kind of bandwidth control apparatus in the present embodiment, this device is used for realizing above-described embodiment and preferred implementation, has be carried out repeating no more of explanation。As used below, term " module " can realize the software of predetermined function and/or the combination of hardware。Although the device described by following example preferably realizes with software, but hardware, or the realization of the combination of software and hardware is also likely to and is contemplated。
Fig. 2 is the structured flowchart of bandwidth control apparatus according to embodiments of the present invention, this device is applied to Set Top Box, as shown in Figure 2, this device includes: the first acquisition module 22, for obtaining broadcasting specified channel desire bandwidth, and the remaining bandwidth of user, wherein, remaining bandwidth is the difference between the total bandwidth available of user and the presently used total bandwidth of other Set Top Box of user, total bandwidth available refers to the total bandwidth that all Set Top Boxes into this user distribute, wherein, other Set Top Box is the Set Top Box in all Set Top Boxes except Set Top Box;Playing module 24, for when remaining bandwidth is less than desire bandwidth, refusal plays specified channel。
Fig. 3 is the structured flowchart one of bandwidth control apparatus according to embodiments of the present invention, as it is shown on figure 3, the first acquisition module 22 includes: acquiring unit 222, for obtaining the bandwidth that other Set Top Box is currently used from this locality。
Fig. 4 is the structured flowchart two of bandwidth control apparatus according to embodiments of the present invention, as shown in Figure 4, this device also includes: the first sending module 42, for sending the first multicast message to other Set Top Box, wherein, the first multicast message carries the IP address of the currently used bandwidth of Set Top Box and this Set Top Box;First receiver module 44, for receiving the response message that other Set Top Box sends according to the first multicast message;Second acquisition module 46, for obtaining the bandwidth of this other Set Top Box and the IP address of correspondence from response message, and stores。
Fig. 5 is the structured flowchart three of bandwidth control apparatus according to embodiments of the present invention, as it is shown in figure 5, this device also includes: the second sending module 52, and for when remaining bandwidth is not less than desire bandwidth, Set Top Box sends the second multicast message to other Set Top Box;Second receiver module 54, for receiving the judged result that other Set Top Box sends according to the second multicast message, wherein, this judged result is passed through to judge whether this remaining bandwidth is not less than this desire bandwidth and obtains for this other Set Top Box;Playing module 24, is additionally operable to when judged result is no, and refusal plays specified channel, when judged result is for being, plays specified channel。
It should be noted that above-mentioned modules can be by software or what hardware realized, for the latter, it is possible to be accomplished by, but it is not limited to this: above-mentioned modules is respectively positioned in same processor;Or, above-mentioned modules lays respectively at first processor, the second processor and the 3rd processor ... in。
For the problems referred to above existed in correlation technique, illustrating below in conjunction with alternative embodiment, this alternative embodiment combines above-mentioned alternative embodiment and optional embodiment thereof。
This alternative embodiment is single user many Set Top Boxes band width control method in a kind of IPTV system, it is possible to be effectively improved bandwidth availability ratio。Comprise the following steps:
1. the newly-increased Bandwidth Management assembly of Set Top Box, Bandwidth Management assembly comprises following function:
A, Bandwidth Management list: be responsible for safeguarding the band data of all Set Top Boxes in family。
B, bandwidth request interface: send multicast message, bandwidth application to the Set Top Box in family, if bandwidth is not enough, refuse information can be received, and it is not enough to eject prompting frame prompting user bandwidth, it is impossible to the prompting frame commenced business。
C, bandwidth sync cap: after bandwidth application success, can send multicast message to the Set Top Box in family, and notice broadband is applied for successfully, and the Set Top Box receiving this message can synchronize the Bandwidth Management list of this locality。
2. Bandwidth Management assembly starts, and sets up with the Set Top Box in family and is connected: Fig. 6 is Set Top Box link setup sequential chart according to embodiments of the present invention, as shown in Figure 6, comprises the steps:
Step S602, Set Top Box A start and log in electric program menu (ElectronicProgramGuide, referred to as EPG) success;
Step S604, EPG successfully issue the bandwidth that this user is total。
Step S606, Bandwidth Management assembly sends, to Set Top Box in family, the multicast message that logins successfully, sends once every 500ms, sends three times altogether, and this message comprises following content: Set Top Box IP and the currently used bandwidth of Set Top Box。
Step S608, Set Top Box B, C receive A login success message, and returning ACK, this ACK is TCP unicast messages, only sends once, and message content comprises the machine IP and the currently used bandwidth of the machine。
Step S610, is registered to Set Top Box A in the Bandwidth Management list of Set Top Box B, C。
Step S612, Set Top Box A receives the ACK of Set Top Box B, C, and B, C are registered to its Bandwidth Management list。And TCP link setup is successful to Set Top Box B, C。
3. the detection of Bandwidth Management assembly management and Set Top Box connection status in family:
A, Set Top Box can send multicast message within the family every 5s, and message content comprises the bandwidth shared by the machine ip and the machine, receive message Set Top Box can more new data to Bandwidth Management list。
B, Set Top Box do not receive the multicast message that the equipment in register list sends more than 30s, are deleted by the corresponding informance of this equipment in the machine Bandwidth Management list。
4. Set Top Box starts media playback service, bandwidth application flow process:
A, Set Top Box A play channel, obtain channel by EPG and play desire bandwidth。
B, according to the EPG user issued can total bandwidth, with Bandwidth Management assembly already with bandwidth ratio relatively, calculate residual available bandwidth。
If C remaining bandwidth is not enough, and it is not enough to eject prompting frame prompting user bandwidth, it is impossible to the prompting frame commenced business。
If D remaining bandwidth enough plays channel。Starting 300ms intervalometer, send multicast message in family, notice needs to use bandwidth。This multicast message running fire three times, sends once every 100ms。
E, Set Top Box B, C receive this message, whether enough calculate newly-increased bandwidth, if bandwidth deficiency, send refusal multicast request。
If F Set Top Box A receives the refusal multicast request of B or C, do not start broadcasting, and it is not enough to eject prompting frame prompting user bandwidth, it is impossible to the prompting frame commenced business。
If G Set Top Box A all without the refusal multicast request receiving B or C, starts and plays in 300 milliseconds of intervalometers, and band data multicast is used to go out this play service Set Top Box A。
If H Set Top Box A now receives the bandwidth application request of B, if now the application total value of A, B is still unsatisfactory for requirement, then eject prompting frame prompting user bandwidth not enough, it is impossible to the prompting frame commenced business。If now A, B total value meets requirement, then according to the timestamp comparation of band inside two message, the request first sent allows bandwidth application。If the message time stamp that A sends is forward, then send refusal bandwidth application request to B, otherwise and to eject prompting frame prompting user bandwidth not enough, it is impossible to the prompting frame commenced business。
5. Set Top Box B, C receives the broadcast of A, updates local Bandwidth Management list。
A, Set Top Box stop media services, discharge bandwidth flow process:
B, Set Top Box A exit current channel success, it is necessary to update Set Top Box A Bandwidth Management list, delete bandwidth used by this channel, send multicast message, continuously transmit three times, send once every 100ms in family。
Set Top Box B, C receive A and discharge bandwidth messages。Update local Bandwidth Management list。
Fig. 7 is that bandwidth flow chart is play in Set Top Box application according to embodiments of the present invention, as it is shown in fig. 7, this flow chart illustrates Set Top Box application plays the concrete steps of bandwidth。
Fig. 8 is Set Top Box release bandwidth sequential chart according to embodiments of the present invention, and as shown in Figure 8, this sequential chart comprises the steps:
Step S802, STBA stop playing successfully;
Step S804, STBA update the machine Bandwidth Management list;
Step S806, STBA send multicast message notice STBB, STBC;
Step S808, STBB/STBC receive message, and in amendment bandwidth managing listings, STBA takies data。
In sum, can effectively ensure, when bandwidth deficiency, extra media service request can be refused by alternative embodiment of the present invention, it is ensured that the fluency of IPTV service in family。Set Top Box in family updates the Bandwidth Management list each safeguarded by multicast message, and each Set Top Box preserves up-to-date bandwidth conditions such that it is able to ensure effectiveness and the stability of Bandwidth Management。
In another embodiment, additionally providing a kind of software, this software is for performing the technical scheme described in above-described embodiment and preferred implementation。
In another embodiment, additionally providing a kind of storage medium, in this storage medium, storage has above-mentioned software, and this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.。
Obviously, those skilled in the art should be understood that, each module of the above-mentioned present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or it is distributed on the network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, can be stored in storage device is performed by calculation element, and in some cases, shown or described step can be performed with the order being different from herein, or they are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are fabricated to single integrated circuit module realize。So, the present invention is not restricted to the combination of any specific hardware and software。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。

Claims (10)

1. a band width control method, it is characterised in that including:
Set Top Box obtains plays specified channel desire bandwidth, and the remaining bandwidth of user, wherein, described remaining bandwidth is the difference between the total bandwidth available of described user and the presently used total bandwidth of other Set Top Box of described user, described total bandwidth available refers to the total bandwidth that all Set Top Boxes into described user distribute, wherein, other Set Top Box described is the Set Top Box in described all Set Top Boxes except described Set Top Box;
When described remaining bandwidth is less than described desire bandwidth, described Set Top Box refusal plays described specified channel。
2. method according to claim 1, it is characterised in that described total bandwidth available obtains in the following manner:
Described Set Top Box obtains described total bandwidth available from electric program menu EPG。
3. method according to claim 1, it is characterised in that the described presently used total bandwidth of other Set Top Box obtains in the following manner:
Described Set Top Box obtains the bandwidth that other Set Top Box is currently used from this locality。
4. method according to claim 3, it is characterised in that described Set Top Box obtains from this locality before the bandwidth that other Set Top Box is currently used, including:
Described Set Top Box sends the first multicast message to other Set Top Box described, wherein, carries the IP address of the currently used bandwidth of described Set Top Box and described Set Top Box in described first multicast message;
Described Set Top Box receives the response message that other Set Top Box described sends according to described first multicast message;
Described Set Top Box obtains the bandwidth of other Set Top Box described and the IP address of correspondence from described response message, and stores。
5. method according to claim 1, it is characterised in that described method also includes:
When described remaining bandwidth is not less than described desire bandwidth, described Set Top Box sends the second multicast message to other Set Top Box described;
Described Set Top Box receives the judged result that other Set Top Box described sends according to described second multicast message, and wherein, this judged result is that other Set Top Box described is by judging whether described remaining bandwidth is not less than described desire bandwidth and obtains;
When judged result is no, described Set Top Box refusal plays described specified channel, and when judged result is for being, described Set Top Box plays described specified channel。
6. method according to claim 5, it is characterised in that after described Set Top Box plays described specified channel, described method also includes:
When described Set Top Box stops playing described specified channel, described Set Top Box discharges bandwidth used by described specified channel;
Described Set Top Box is sent to other Set Top Boxes described by discharging the information of bandwidth used by described specified channel。
7. a bandwidth control apparatus, described device is applied to Set Top Box, it is characterised in that described device includes:
First acquisition module, for obtaining broadcasting specified channel desire bandwidth, and the remaining bandwidth of user, wherein, described remaining bandwidth is the difference between the total bandwidth available of described user and the presently used total bandwidth of other Set Top Box of described user, described total bandwidth available refers to the total bandwidth that all Set Top Boxes into described user distribute, and wherein, other Set Top Box described is the Set Top Box in described all Set Top Boxes except described Set Top Box;
Playing module, for when described remaining bandwidth is less than described desire bandwidth, refusal plays described specified channel。
8. device according to claim 7, it is characterised in that described first acquisition module includes:
Acquiring unit, for obtaining the bandwidth that other Set Top Box is currently used from this locality。
9. device according to claim 8, it is characterised in that described device also includes:
First sending module, for sending the first multicast message to other Set Top Box described, wherein, carries the IP address of the currently used bandwidth of described Set Top Box and described Set Top Box in described first multicast message;
First receiver module, for receiving the response message that other Set Top Box described sends according to described first multicast message;
Second acquisition module, the IP address of bandwidth and correspondence for obtaining other Set Top Box described from described response message, and store。
10. device according to claim 8, it is characterised in that described device also includes:
Second sending module, for when described remaining bandwidth is not less than described desire bandwidth, described Set Top Box sends the second multicast message to other Set Top Box described;
Second receiver module, for receiving the judged result that other Set Top Box described sends according to described second multicast message, wherein, this judged result is that other Set Top Box described is by judging whether described remaining bandwidth is not less than described desire bandwidth and obtains;
Described playing module, is additionally operable to when judged result is no, and refusal plays described specified channel, when judged result is for being, plays described specified channel。
CN201410682989.9A 2014-11-24 2014-11-24 Bandwidth control method and device Withdrawn CN105704549A (en)

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Application publication date: 20160622