CN101060717B - Quality of service securing method and apparatus - Google Patents
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- CN101060717B CN101060717B CN2007100061310A CN200710006131A CN101060717B CN 101060717 B CN101060717 B CN 101060717B CN 2007100061310 A CN2007100061310 A CN 2007100061310A CN 200710006131 A CN200710006131 A CN 200710006131A CN 101060717 B CN101060717 B CN 101060717B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
- H04L47/263—Rate modification at the source after receiving feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
- H04W28/0257—Traffic management, e.g. flow control or congestion control per individual bearer or channel the individual bearer or channel having a maximum bit rate or a bit rate guarantee
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
- H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
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Abstract
A quality of service (QoS) securing apparatus and method using a communication protocol is provided. The QoS securing method is performed by a reception side that is receiving data from a transmission side. The method includes generating information about a changed communication environment according to a change in a communication environment of the reception side, and transmitting the information to the transmission side. An exchange of information about a communication environment using the communication protocol between the reception side and the transmission side can inform the transmission side about resources of the reception side, link characteristics, characteristics of a link on a transmission path, etc., thereby securing a QoS of data communication between the reception side and the transmission side.
Description
The cross reference of related application
The application require respectively on April 19th, 2006 and May 11 in the korean patent application of the Korea S Department of Intellectual Property submission 2006-35345 number priority with 2006-42393 number, its content incorporates this paper by reference.
Technical field
Each aspect of the present invention relates to service quality (QoS) support method and the device that utilizes communication protocol, more specifically, relates to by utilizing the communication protocol exchange message to ensure the method and apparatus of the QoS of data communication between recipient and transmit leg.
Background technology
Because the development of wire/wireless communication technology supports multimedia wire/wireless communication service to have polytype and standard.Particularly, along with data transfer rate increases, increasing service provides music or film by wire/wireless communication in real-time streamed mode.In this respect, allow seamlessly listoning music or watch film extremely important of service-user.Ensure service quality (QoS) most important for following communication environment with the method for guaranteeing seamless data communication between recipient and the transmit leg.
Fig. 1 transmits the diagram of session for showing the routine data that switches between the heterogeneous network.With reference to Fig. 1, recipient 110 portable terminal is that the wireless lan network 130 of 2Mbps moves to the Wideband Code Division Multiple Access (WCDMA) that the maximum data transfer rate is 384Kbps (WCDMA) network 140 from the maximum data transfer rate.Portable terminal recipient 110 switches (102) before, is in the wireless lan network 130 of 2Mbps in the maximum data transfer rate, and transmit leg 120 is with the speed sending data (101) of 1Mbps.Even switching (102) afterwards, because do not notify the link property of the WCDMA network 140 that transmit leg 120 recipients' 110 portable terminal moves to, so the speed sending data (103) that transmit leg 120 continues with same 1Mbps.As a result, recipient 110 portable terminal can't receive the data of sending from transmit leg fully, thereby causes loss of data.Therefore, transmit data if transmit leg 120 sends the stream of music or film, then recipient 110 can't be with real-time listoning music or watch film seamlessly.
Fig. 2 is for transmitting the diagram of session according to another routine data that switches between the heterogeneous network.With reference to Fig. 2, opposite with data transfer sessions shown in Figure 1, recipient 210 portable terminal is that the WCDMA network 230 of 384Kbps moves to the wireless lan network 240 that the maximum data transfer rate is 2Mbps from the maximum data transfer rate.Portable terminal recipient 210 switches (202) before, and transmit leg 220 is with the speed sending data (201) of 384Kbps.Even switching (202) afterwards, because do not notify the link property of the wireless lan network 240 that transmit leg 220 recipients' 210 portable terminal moves to, so the speed sending data (203) that transmit leg 220 continues with same 384Kbps.As a result, transmit leg 220 is take the speed sending data of the not high speed 156Kbps of the middle efficient of wireless lan network 240 (its maximum data transfer rate is as 2Mbps).
The same with switching shown in Fig. 1 and 2, between the heterogeneous network, the network link characteristic after carrying out switching between the heterogeneous network may be different from the network link characteristic before switching.If network has after carrying out than more user before switching, then the user can intercom with low speed in this network mutually.In addition, if network has than higher bit error rate before switching, then transmit data with lower speed after carrying out, to reduce bit error rate.If network has than still less user and lower bit error rate before switching, then transmit data with more speed after carrying out.
When the recipient communicated by letter in network and do not have switching between the network, data transfer rate may change owing to the number of users in the network and data communications environment.
The information of the variation of the available resources that the data that receiving about the terminal of processing the recipient are required may affect the QoS of data communication.Although can't process the current data that receiving owing to being used for the variation, recipient's terminal of CPU, memory etc. ardware feature of deal with data, if transmit leg transmission data, then recipient's terminal can't suitably receive music or film.
Transmit leg sends data according to the communication environment that changes, thereby can guarantee the QoS that data transmit.For example, transfer rate than the low network of another network in, may transmit the data of low-qualityer music or film, so that real time service to be provided.In addition, transfer rate than the high network of another network in, may transmit the music of better quality or the data of film, take affair so that spreading of better quality to be provided.If distribute more CPU or memory to process the data that send from transmit leg to the recipient, then transmit leg can transmit the data than more high-quality music or picture before distributing CPU or memory.
Use utilizes the sliding window of the routine of Transmission Control Protocol to block control, comes the communication environment according to the recipient, the size of change data.The recipient sends affirmation (ACK) signal, and the indication recipient has received the data from transmit leg error-free.Transmit leg normally receives ack signal, and increases the data volume that once sends.But if transmit leg is not received ack signal, then transmit leg reduces the data volume that once sends.Because can or degenerate and control data transfer rate according to the improvement of recipient's link property, so transmit leg can send data according to recipient's link property.But conventional sliding window blocks control needs many times to send data according to recipient's improvement or the link property of degeneration, and during time of delay, this can make link can not get effective application.
Summary of the invention
Each aspect of the present invention provides a kind of transmit leg that ensures about the apparatus and method of the service quality (QoS) of the data communication between the recipient, although the characteristic of recipient's link or be changed also like this for the treatment of the available resources of data.
Each aspect of the present invention also provides a kind of storage to be used for carrying out the computer readable recording medium storing program for performing of the program of the method.
According to an aspect of the present invention, provide a kind of service quality (QoS) support method, having comprised: from the variation of the recipient's of transmit leg receive data communication environment, generated the information about the communication environment that changes according to; And this information sent to transmit leg.
According to a further aspect in the invention, described information about the communication environment that changes comprises about the information of the characteristic of the link of the communication environment that changes and/or about the information of the available resources of the data that receiving in the communication environment that changes for the treatment of the recipient.
According to a further aspect in the invention, when the recipient carried out switching from the first network to the second network, described information about link property was the information about the characteristic of the link of second network.
According to a further aspect in the invention, described transmission information comprises: before switching, send the information of the characteristic of described link about second network.
According to a further aspect in the invention, described method also comprises: when the recipient receives response message about link property from transmit leg, switch.
According to a further aspect in the invention, described transmission information comprises: after switching, send the information of the characteristic of described link about second network.
According to a further aspect in the invention, described information about available resources be about following at least one: the size of the CPU of receiver equipment, encoder and decoder, monitor resolution, memory and reception buffer.
According to a further aspect in the invention, provide a kind of QoS ensuring equipment, having comprised: communication environment Information generation device, it from the variation of the recipient's of transmit leg receive data communication environment, generates the information about the communication environment that changes according to; And transmitter, its information that will be somebody's turn to do about the communication environment that changes sends to transmit leg.
According to a further aspect in the invention, described information about the communication environment that changes comprises about the information of the characteristic of the link of the communication environment that changes and/or about the information of the available resources of the data that receiving in the communication environment that changes for the treatment of the recipient.
According to a further aspect in the invention, provide a kind of QoS support method, comprising: the recipient sends data from sending direction; From the information of recipient's reception about recipient's communication environment; And according to this information of receiving, change the QoS that data transmit.
According to a further aspect in the invention, described information about communication environment comprises about the information of the characteristic of the link of recipient's communication environment and/or about the information of the available resources of the data that receiving in recipient's communication environment for the treatment of the recipient.
According to a further aspect in the invention, described method also comprises: according to described information about communication environment, and the response message that the QoS that the generation designation data transmits has changed; And this response message sent to the recipient.
According to a further aspect in the invention, provide a kind of QoS ensuring equipment, having comprised: transmit leg, it sends data to the recipient; The communication environment message recipient, it receives the information about recipient's communication environment; And the QoS controller, it is according to should about the information of communication environment, changing QoS.
According to a further aspect in the invention, described device also comprises: the response message maker, and it is according to described information about communication environment, generates the response message that QoS that designation data transmits has changed; And transmitter, it sends to the recipient with this response message.
According to a further aspect in the invention, provide a kind of computer readable recording medium storing program for performing, storage is used for carrying out the computer-readable program of QoS support method.
Other aspects of the present invention and/or advantage in the following description part are listed, and can partly obviously find out from describe, perhaps can be by practice of the present invention is understood.
Description of drawings
By referring to accompanying drawing, to the description of embodiment, with clear, be more readily understood the present invention these and/or other aspect and advantage, wherein:
Fig. 1 is for transmitting the diagram of session according to the routine data that switches between the heterogeneous network;
Fig. 2 is for transmitting the diagram of session according to another routine data that switches between the heterogeneous network;
Fig. 3 for according to the embodiment of the invention, according to the ensure service quality flow chart of method of (QoS) of recipient's link property;
Fig. 4 A is for according to the flow chart embodiment of the invention, send method about the information of link property (it is one of operation of the QoS support method of recipient's execution) switching after;
Fig. 4 B is the flow chart according to the QoS support method embodiment of the invention, that the recipient carries out according to the variation of the required resource characteristics of deal with data;
Fig. 5 is the flow chart according to the QoS support method embodiment of the invention, that carried out by transmit leg;
Fig. 6 A is the diagram according to the data transfer sessions embodiment of the invention, the QoS support method;
Fig. 6 B be according to another embodiment of the present invention, the diagram of the data transfer sessions of QoS support method;
Fig. 7 be according to the embodiment of the invention, based on the flow chart of the QoS support method of the link information of transfer path;
Fig. 8 is for transmitting the diagram of session according to the link information of the link information embodiment of the invention, that comprise transfer path;
Fig. 9 shows according to the packet configuration embodiment of the invention, that comprise communication environment information;
Figure 10 is the block diagram according to the QoS ensuring equipment embodiment of the invention, the recipient; With
Figure 11 is the block diagram according to the QoS ensuring equipment embodiment of the invention, transmit leg side.
Embodiment
Now will be in detail with reference to embodiments of the invention, its example shows in the accompanying drawings, wherein identical Reference numeral represents identical element.Embodiment is below described with by being explained with reference to the drawings the present invention.
Fig. 3 for according to first embodiment of the invention, according to the ensure service quality flow chart of method of (QoS) of recipient's link property.With reference to Fig. 3, the link property of recipient's Sampling network (operation 301).The recipient can by the access point (AP) of analyzing the network under the recipient or the prearranged signals that router sends, detect link property.AP is included in the WLAN, and the base station in the mobile communication such as code division multiple access (CDMA), Wideband Code Division Multiple Access (WCDMA) (WCDMA) of indication.Wireless network can be supported any standard, for example GSM (Global Systems for Mobile communications).Network also can be cable network.The detection methods such as network drive interface specification (NDIS) such as Windows (OS) detect contiguous recipient and send wired station of data or the characteristic of the link between the radio station to the recipient.
The link property that detects comprises the information of intensity about data transfer signals, data transfer rate, bit error rate (BER) etc.The link property that detects can comprise about the information of the wireless communication standard of cordless communication network, about the information of cable network or about any information of any network.In WLAN the recipient's of receive data terminal can analytical cycle ground from network other-end or the beacon signal of sending from AP, with the link property of Sampling network.Other aspects of the present invention may be used to the information from other sources.
From the first isomorphism/heterogeneous network to the second isomorphism/switching of heterogeneous network, the recipient detects the information about the link property of the second isomorphism/heterogeneous network.
The method that ensures QoS can further be determined the Link State (not shown) according to link property.The Link State that detects can comprise above-mentioned information about each factor.Therefore, it is inadequate to the information that transmit leg sends based on each factor.In order to overcome this defective, according to the quality of communication environment, the communication environment of the network under the recipient is divided into a plurality of grades, according to each ranking score distribution coefficient, and send the coefficient that distributes, thereby transmit leg can be according to the parameter identification recipient's who receives link property.
The recipient generates about the information (after this being called " link information ") of the link property that detects (operation 302).Termly or when link property changes, recipient's link generation information is to send this link information (operation 303) to transmit leg.According to other aspects, the recipient may change link information at any time.
The recipient determines whether transmit leg has sent the information (operation 304) in response to the link information that sends from the recipient.If transmit leg does not send the grouping that comprises this response message to the recipient, then the recipient turns back to operation 303, again to send the link information that changes.If the sending direction recipient has sent the grouping that comprises this response message, then the recipient determines whether to switch (operation 305).
If need to switch, then receive that from transmit leg the recipient of response message switches (operation 306).If owing to the switching of operation in 305 changed link property, then because the recipient has received response message from transmit leg, so the recipient is switched and receive data (operation 307) in operation 306.But owing to the link information that changes in the identical network has changed link property, and do not switch, then the recipient is operating in 307 according to the link property receive data that changes.
As mentioned above, link property may since carry out between the homogeneous network switching before and the difference of the number of the network user afterwards, signal strength signal intensity, BER etc. change.Therefore, in operation 305, between isomorphism/heterogeneous network, switch.
Fig. 4 A is for according to flow chart second embodiment of the invention, send method about the information of link property (it is one of operation of the QoS support method of recipient's execution) switching after.With reference to Fig. 4 A, the recipient detects the switching (operation 401) from the first network to the second network, and switches (operation 402).
The recipient detects the link property (operation 403) of second network.As described in reference Fig. 3, the link property that detects comprises about the information of the intensity of data transfer signals in the second network, data transfer rate, bit error rate BER and about the information of the wireless communication standard of cordless communication network.Other aspects of the present invention can comprise any information.
The recipient utilizes communication protocol to generate information (operation 404) about the link property that detects.The same with operation 302 shown in Figure 3, the recipient generates this information termly, to transmit link information (operation 405), perhaps generates grouping when link property changes.Other aspects of the present invention are link generation information at any time.
The recipient determines whether transmit leg has sent the information (operation 406) in response to the link information that sends from the recipient.If transmit leg does not send response message, then the recipient sends link information in operation 405 to transmit leg.If transmit leg has sent response message, recipient's receive data (operation 407) then.
The recipient is not discretely execution graph 3 and the QoS support method shown in the 4A, but can repeatedly send link information switching after, even like this during the transmission link information before the recipient is being switched yet.In addition, only have as the recipient since evitable former thereby do not switching before when sending link information, receive and can after switching, send link information just now.
Fig. 4 B is the flow chart according to QoS support method third embodiment of the invention, that the recipient carries out according to the variation of the required resource characteristics of deal with data.Except the information about the link property shown in Fig. 3 and the 4A, communication environment information comprises that also it is sent to transmit leg about the information of the available resources of the data that receiving for the treatment of the recipient, to carry out the method for the QoS that ensures data communication.Communication environment information can comprise any information useful when determining QoS.
With reference to Fig. 4 B, the recipient generates about the information (operation 411) for the treatment of the available resources of the current data of receiving.Comprise information about ardware features such as CPU, memory, reception buffer size, monitor resolution about the information of available resources, it is essential by the data that the terminal of processing the recipient is receiving, and about the information such as software features such as employed available video/audio codecs in recipient's the terminal.The receive direction transmit leg sends about the information of hardware/software characteristic and about the information of available resources, comprises the characteristic of the terminal of the data communications environment that may affect recipient and transmit leg.Other aspects of the present invention can send any information about available resources.
The receive direction transmit leg sends the information (operation 412) about available resources.If the information about available resources changes, the receive direction transmit leg sends this information.Transmit leg also can be termly to the information of transmit leg transmission about resource.Other aspects of the present invention can send this information at any time.
The recipient determines whether transmit leg has sent in response to the information (operation 413) about the information of resource that sends from the recipient.If the recipient receives response message from transmit leg, then the recipient is according to the QoS receive data that changes (operation 414).If the recipient does not receive response message from transmit leg, then the recipient turns back to operation 412, and again sends the information about available resources.
Fig. 5 is the flow chart according to QoS support method fourth embodiment of the invention, that carried out by transmit leg.With reference to Fig. 5, transmit leg determines whether to receive the information about communication environment (operation 501) of sending from the recipient.If transmit leg is received this information, then transmit leg changes the QoS (operation 502) that data transmit.If transmit leg is not received this information, then because the state of the employed resource of transmit leg or link property do not change, so transmit leg continues to send data (operation 504) to the recipient.
In operation 502, transmit leg according to send from the recipient, about the information of communication environment, change the QoS that data transmit.If recipient's BER owing to the degeneration of link property increases, then uses forward error correction (FEC) method just to reduce BER.If data transfer rate is reduced according to recipient's data transfer rate, then use the method for coding data to be sent, with the number of the frame of the per second that reduces cinematic data, to reduce resolution.The method can be changed into the other method with high compression rate.If data transfer rate increases, then by change QoS to get off: increase the frame number of per second, increase resolution, perhaps use the data-encoding scheme with little compressible.Transmit leg may have the content of all kinds quality, and according to raising or the degeneration of recipient's link property, sends high or low quality content.For the not restriction of QoS control method.Can use variation according to recipient's communication environment, change all methods of the quality of the data that sending, control QoS.
Transmit leg generates the indication transmit leg and is ready to basis sends data about the information of the change of communication environment response message (operation 504).Transmit leg can be used to indicate transmit leg and whether be ready to send data for " 0 " or " 1 " by the certain bits that appointment sends to recipient's packet, generates response message.Other aspects of the present invention can generate response message with additive method.In addition, transmit leg can generate how concrete designation data encodes, the response message of data format, size of data etc.How the to encode number, resolution, compression ratio, FEC of the frame that comprises per second or about other information of coding techniques of data.
Transmit leg sends the grouping (operation 504) comprise response message, and sends data (operation 505) according to the link information of recipient's variation.
Fig. 6 A for any embodiment according to the present invention, transmit the diagram of the session of link information when the switching carried out between isomorphism/heterogeneous network.
With reference to Fig. 6 A, show that transmit leg 620 is that the transfer rate with 100Mbps sends data (operation 601 and 602) to recipient 610 in the network 630 of 100Mbps in data transfer rate.Other aspects of the present invention can be used any speed.Because moving to data transfer rate, recipient 610 for example is the network 640 of 156Kbps, so recipient 610 detects the link property of the network that changes.Recipient 610 is according to the link property that detects, link generation information, and this link information sent to transmit leg 620 (operation 603).The transmit leg 620 of receiving grouping sends response message (operation 604) to recipient 610.When receiving response message, recipient 610 is switched.After having carried out operation 603 and 604, transmit leg 620 sends data (operation 605 and 606) according to the link property that changes with the 156Kbps transfer rate.
When recipient 610 moved to network 640 from network 630, data transfer rate was owing to the switching of carrying out between isomorphism/heterogeneous network changes.
With reference to Fig. 6 B, when recipient 650 transmits data (namely use same base station or AP, and do not have the switching between isomorphism/heterogeneous network) with transmit leg 660 in consolidated network, change data transfer rate.
Transmit leg 660 sends data (operation 651 and 652) with the transfer rate of for example 100Mbps to recipient 650.Then, data transfer rate changes (operation 653).Data transfer rate may be because in same base station or the variation of the user's that logins of AP variation, signal strength signal intensity or any former thereby change.
With reference to Fig. 6 A and 6B, change data transfer rate.But, when the interruption owing to rf wave increases or reduce BER or owing to change in signal strength is degenerated communication environment or when improving, caused during the data between transmit leg and recipient transmit that all changes of the factor that link property changes can be comprised in the link information.That is, can comprise any information that changes about link property.
When the link information with the recipient sent to recipient and transmit leg and sends data according to link information, this link information included only about the AP of direct access recipient's terminal or the information of the link between the router.But the data communication between recipient and the transmit leg may be subjected to the impact of the link property of transfer path (for example router on the transfer path or transponder between transmit leg and the recipient).Therefore, carried out by transmit leg, be useful based on the method for the transmission data of the link information of transfer path.
Fig. 7 be according to fifth embodiment of the invention, based on the flow chart of the QoS support method of the link information of transfer path.With reference to Fig. 7, be used for the link information (operation 701) that the connected node of forwarding data receives that the receive direction transmit leg sends.This link information includes only the link property of contiguous recipient's connected node.
This connected node that is used for forwarding data determines whether to add or corrects this link information (operation 702).If this connected node can't transmit data according to recipient's link information, then this connected node adds or corrects this link information (operation 703), to generate the link information based on the link property of transfer path.
Fig. 8 is for transmitting the diagram of session according to the link information of link information fifth embodiment of the invention, that comprise transfer path.With reference to Fig. 8, recipient 810 is the router 820 of 5Mbps and router 830 that data transfer rate is 50Mbps and form links with transmit leg 840 by data transfer rate, and transmit leg 840 is that the transfer rate with 156Kbps sends data (being respectively operation 801 and 802) to recipient 810 in the network 850 of 156Kbps in data transfer rate.Because when recipient 810 moves to network 860 from network 850, data transfer rate is increased to 100Mbps from 156Kbps, so recipient 810 generates the link information of 100Mbps data transfer rates, and this link information sent to router 820 (operation 803).But, because router 820 data transfer rates are 5Mbps, so even transmit leg 840 sends data with the transfer rate of 100Mbps, recipient 810 also can't receive these data.Therefore, router 820 changes link information according to the data transfer rate of 5Mbps, and sends link information to router 830 (operation 804).
The router 830 of receiving this link information from router 820 does not change link information, and send it to transmit leg 840 (operation 805), this is that its data transfer rate than the 50Mbps of router 830 is low because link information has the data transfer rate of 5Mbps.
Correspondingly, transmit leg 840 is according to the link information (operation 805) of the link property of reflection transfer path, transfer rate with 5Mbps sends data (operation 806 and 807), ensures thus the QoS that the data between recipient 810 and the transmit leg 840 transmit.
Link property is owing to the following variation that affects the factor of the data transfer state between transmit leg 840 and the recipient 810 changes, the for example increase of data transfer rate or reduction, increase or the reduction of the BER that is caused by the interruption of rf wave, degeneration or the improvement of the communication environment that is caused by the signal strength signal intensity reduction, etc.Other aspects of the present invention can change link property owing to the variation of any factor.
For the method that generates and send communication environment information, not restriction.But, because the data that the group-based structure is carried out between recipient and the transmit leg transmit, so link information can be contained in the packet, and utilize communication protocol to transmit.
With reference to Fig. 9, the grouping that is used for transmitting data is divided into: communication protocol field 910, the data communication protocol of its indication recipient and transmit leg; And Payload field 920, its data for transmitting.Communication protocol field 910 comprises the different communication protocol head 930 to 960 of different layers (for example the transfer control agreement (TCP) of the IPv4 of network layer, IPv6 or transport layer and user datagram protocol (UDP) etc.).In application layer, presentation layer, session layer, data link layer and physical layer, provide different communication protocol.Grouping can be used layer and the combination in any of agreement.
Figure 10 is the block diagram according to QoS ensuring equipment 1000 sixth embodiment of the invention, the recipient.With reference to Figure 10, recipient's QoS ensuring equipment 1000 comprises: link property detector 1020, communication environment Information generation device 1030 and transmitter 1040.
Link property detector 1020 detects link property according to the connected node 1010 (being AP or router) of recipient's access.By communication environment Information generation device 1030, use the link property link generation information that detects, to send transmit leg to.Communication environment Information generation device 1030 generates has the field of communication environment information, and this field is inserted in the communication protocol field of packet, perhaps this field is inserted in the part of existing protocol, to generate communication environment information.
Transmitter 1040 sends to transmit leg 1050 with the communication environment information that communication environment Information generation device 1030 generates.
Figure 11 is the block diagram according to QoS ensuring equipment 1100 seventh embodiment of the invention, transmit leg.With reference to Figure 11, the QoS ensuring equipment 1100 of transmit leg comprises: communication environment message recipient 1120, QoS controller 1130, response message maker 1140 and transmitter 1150.
Communication environment message recipient 1120 receives the communication environment information of sending from recipient 1110, detects link information according to communication environment information, and this link property is sent to QoS controller 1130.
The present invention also can be implemented as the computer-readable instruction code on the computer readable recording medium storing program for performing.This computer readable recording medium storing program for performing can for can store can be after this by any data storage harvest of the data of computer system reads.The example of computer readable recording medium storing program for performing comprises read-only memory (ROM), random access storage device (RAM), CD-ROM, tape, floppy disk and optical data storage.Computer readable recording medium storing program for performing also can be the computer system of distributed network coupling, thereby computer-readable code is stored and carried out in the mode that distributes.
According to each aspect of the present invention, information about the variation of the characteristic of the link on the transfer path between recipient or recipient and the transmit leg is sent to transmit leg, and transmit leg sends data according to the link property that changes, and ensures thus the QoS of data communication between recipient and the transmit leg.
Although shown and described several embodiments of the present invention, those skilled in the art should understand that: under the prerequisite that does not break away from spirit of the present invention that claim and equivalent thereof limit and principle, can change this embodiment.
Claims (18)
1. QoS guarantee method comprises:
From the variation of the recipient's of transmit leg receive data communication environment, the recipient generates the information about the communication environment that changes according to; And
This information is sent to transmit leg,
Wherein said information about the communication environment that changes comprises the information about the characteristic of the link of the communication environment that changes, and wherein when the recipient carries out switching from the first network to the second network, described information about link property is the information about the characteristic of the link of second network, the recipient generates about the information of the characteristic of the link of second network and sends connected node for forwarding data to, this connected node add or corrects link information and with add or correction after information transmit to transmit leg.
2. the method for claim 1 wherein sends this information and comprises to transmit leg: before switching, send the information of the characteristic of described link about second network.
3. method as claimed in claim 2 also comprises: when the recipient receives response message about link property from transmit leg, switch.
4. the method for claim 1 wherein sends this information and comprises to transmit leg: after switching, send the information of the characteristic of described link about second network.
5. the method for claim 1 also comprises: access point or the router detection link property of the network under the recipient.
6. the method for claim 1 also comprises:
According to the quality of communication environment, recipient's communication environment is divided into a plurality of grades;
Each distribution coefficient to described a plurality of grades; And
Wherein this information is sent to transmit leg and comprise: the coefficient that transmission distributes is to transmit leg.
7. QoS guarantee system, this system comprises service quality guarantee device and connected node, the service quality guarantee device comprises communication environment Information generation device and transmitter, the system is characterized in that:
Communication environment Information generation device from the variation of the recipient's of transmit leg receive data communication environment, generates the information about the communication environment that changes according to; And
The information that transmitter will be somebody's turn to do about the communication environment that changes sends to transmit leg,
Wherein said information about the communication environment that changes comprises the information about the characteristic of the link of the communication environment that changes, and wherein when the recipient carries out switching from the first network to the second network, described information about link property is the information about the characteristic of the link of second network, the recipient generates about the information of the characteristic of the link of second network and sends connected node for forwarding data to, this connected node add or corrects link information and with add or correction after information transmit to transmit leg.
8. system as claimed in claim 7, wherein said device also comprises: link property detector, access point or the router detection link property of its network under the recipient.
9. system as claimed in claim 7, wherein communication environment Information generation device is according to the state of communication environment, and recipient's communication environment is divided into a plurality of grades, and to each distribution coefficients of described a plurality of grades; And
Wherein transmitter sends the coefficient distribute to transmit leg.
10. QoS guarantee method comprises:
The recipient sends data from sending direction;
Transmit leg is from the information of recipient's reception about the communication environment of recipient's change; And
According to the information of receiving, change the service quality that the transmit leg data transmit,
Wherein said information about the communication environment that changes comprises the information about the characteristic of the link of the communication environment that changes, and wherein when the recipient carries out switching from the first network to the second network, described information about link property is the information about the characteristic of the link of second network, the recipient generates about the information of the characteristic of the link of second network and sends connected node for forwarding data to, this connected node add or corrects link information and with add or correction after information transmit to transmit leg.
11. method as claimed in claim 10, wherein said change service quality comprises: according to being included in described variation about the bit error rate in the information of link property, change forward error correction of giving recipient's data to be sent.
12. method as claimed in claim 10, wherein said change service quality comprises: according to being included in described variation about the data transfer rate in the information of link property, change at least one in frame number, resolution and the compression ratio of per second of data of giving the recipient to be sent.
13. method as claimed in claim 10 also comprises:
According to the information about communication environment, the service quality that the generation designation data transmits is reformed response message; And
This response message is sent to the recipient.
14. a QoS guarantee system comprises:
Transmit leg, it sends data to the recipient;
The communication environment message recipient, it receives the information about recipient's communication environment; And
The service quality controller, its basis changes service quality about the information of the communication environment of change;
Connected node, its forwarding data,
Wherein said information about the communication environment that changes comprises the information about the characteristic of the link of the communication environment that changes, and wherein when the recipient carries out switching from the first network to the second network, described information about link property is the information about the characteristic of the link of second network, the recipient generates about the information of the characteristic of the link of second network and sends connected node for forwarding data to, this connected node add or corrects link information and with add or correction after information transmit to transmit leg.
15. system as claimed in claim 14, wherein said service quality controller is according to being included in described variation about the bit error rate in the information of link property, changes the forward error correction of the data to the recipient to be sent.
16. system as claimed in claim 14, wherein said service quality controller is according to being included in described variation about the data transfer rate in the information of link property, changes in frame number, resolution and the compression ratio of per second of the data to the recipient to be sent at least one.
17. system as claimed in claim 14 also comprises:
The response message maker, it is according to described information about the communication environment that changes, generates the response message that indication has changed the service quality that data transmit; And
Transmitter, it sends to the recipient with this response message.
18. a method that ensures service quality comprises:
The communication environment information notice transmit leg about changing with the recipient; And
According to this communication environment, change service quality,
Wherein said information about the communication environment that changes comprises the information about the characteristic of the link of the communication environment that changes, and wherein when the recipient carries out switching from the first network to the second network, described information about link property is the information about the characteristic of the link of second network, the recipient generates about the information of the characteristic of the link of second network and sends connected node for forwarding data to, this connected node add or corrects link information and with add or correction after information transmit to transmit leg.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
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| KR35345/06 | 2006-04-19 | ||
| KR20060035345 | 2006-04-19 | ||
| KR1020060042393A KR100823263B1 (en) | 2006-04-19 | 2006-05-11 | Method and apparatus for securing a Quality of Service |
| KR42393/06 | 2006-05-11 |
Related Child Applications (1)
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| CN200910253252.4A Division CN101764676B (en) | 2006-04-19 | 2007-01-31 | Quality of service securing method and apparatus |
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| CN101060717A CN101060717A (en) | 2007-10-24 |
| CN101060717B true CN101060717B (en) | 2013-04-24 |
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| CN200910253252.4A Expired - Fee Related CN101764676B (en) | 2006-04-19 | 2007-01-31 | Quality of service securing method and apparatus |
| CN2007100061310A Expired - Fee Related CN101060717B (en) | 2006-04-19 | 2007-01-31 | Quality of service securing method and apparatus |
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| CN200910253252.4A Expired - Fee Related CN101764676B (en) | 2006-04-19 | 2007-01-31 | Quality of service securing method and apparatus |
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| JP (1) | JP2013066188A (en) |
| KR (1) | KR100823263B1 (en) |
| CN (2) | CN101764676B (en) |
| DE (1) | DE602007005049D1 (en) |
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| US8275375B2 (en) * | 2010-03-25 | 2012-09-25 | Jong Hyup Lee | Data integration for wireless network systems |
| JP6677061B2 (en) | 2016-04-22 | 2020-04-08 | 株式会社リコー | Communication device, communication system, and program |
| CN112019363B (en) * | 2019-05-30 | 2021-12-14 | 华为技术有限公司 | Method, device and system for determining service transmission requirement |
| US11632176B2 (en) * | 2020-10-30 | 2023-04-18 | Juniper Networks, Inc. | Automatic negotiation of optical transceiver configuration parameters |
| EP4358582A1 (en) * | 2021-07-23 | 2024-04-24 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Qos adjustment method and apparatus, device, and medium |
| CN114095451B (en) * | 2021-11-17 | 2024-05-21 | 腾讯科技（深圳）有限公司 | Data processing method, device and computer readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2378613A (en) * | 2001-08-08 | 2003-02-12 | Motorola Inc | Congestion control in a communications network |
| CN1722694A (en) * | 2004-07-12 | 2006-01-18 | 三星电子株式会社 | Method, medium and the device changed between the control heterogeneous networks |
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| KR100307758B1 (en) * | 1999-08-04 | 2001-09-29 | 안병엽 | Method for accepting a call in wireless asynchronous transfer mode |
| CN100388730C (en) * | 2002-11-27 | 2008-05-14 | 华为技术有限公司 | Diffusion method for flow engineering link state |
| JP4427415B2 (en) * | 2004-08-05 | 2010-03-10 | 株式会社日立コミュニケーションテクノロジー | Handoff control method, radio control station, and radio base station |
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2006
- 2006-05-11 KR KR1020060042393A patent/KR100823263B1/en active IP Right Grant
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2007
- 2007-01-11 DE DE602007005049T patent/DE602007005049D1/en active Active
- 2007-01-31 CN CN200910253252.4A patent/CN101764676B/en not_active Expired - Fee Related
- 2007-01-31 CN CN2007100061310A patent/CN101060717B/en not_active Expired - Fee Related
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2378613A (en) * | 2001-08-08 | 2003-02-12 | Motorola Inc | Congestion control in a communications network |
| CN1722694A (en) * | 2004-07-12 | 2006-01-18 | 三星电子株式会社 | Method, medium and the device changed between the control heterogeneous networks |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100823263B1 (en) | 2008-04-17 |
| CN101060717A (en) | 2007-10-24 |
| KR20070103660A (en) | 2007-10-24 |
| CN101764676A (en) | 2010-06-30 |
| CN101764676B (en) | 2014-07-23 |
| JP2013066188A (en) | 2013-04-11 |
| DE602007005049D1 (en) | 2010-04-15 |
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