CN104283800B - Gateway apparatus, communication system and flow control methods - Google Patents
Gateway apparatus, communication system and flow control methods Download PDFInfo
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Abstract
The present invention provides gateway apparatus, communication system and the flow control methods that can reduce communication flows, which includes request message receiving unit, receives the request message that access target is the terminal device with sleep mode in limited network；Request message analysis unit parses the request message received, obtains the information for including in request message；Request message record portion is established for the request message received referring to the information obtained by request message analysis unit and saves request message record；Request message buffer unit, caching will be sent to the request message of the terminal device with sleep mode；And request message cache management portion, when the spatial cache for being judged as request message buffer unit has been expired, for received request message, it is not buffered in request message buffer unit and is abandoned, and addition abandons mark in request message corresponding with received request message record.
Description
Technical field
The present invention relates to gateway apparatus, communication system and flow control methods, more particularly to comprising with sleep mode
Terminal device energy-constrained network used in gateway apparatus, communication system and flow control methods.
Background technique
Terminal device in energy-constrained network is usually to be powered by the battery of finite power.Consider for energy conservation, these
Terminal device is in energy-efficient dormant state, but the state that can periodically resume work in the most of the time, short having worked
After the temporary time, dormant state will be re-introduced into.Terminal device in a dormant state can not carry out the reception of message with
It sends, only in working condition, the terminal device can carry out the interaction and processing of message.
In addition, in existing communication system, due to the communication of limited network and untethered network (such as public network)
Agreement is simultaneously incompatible, it is therefore desirable to which introducing gateway apparatus in the boundary of limited network and untethered network, (also referred to as agency saves
Point), the functions such as the corresponding interface, the conversion of communication protocol and the forwarding of message are provided for described two networks.It is non-to realize
Access of the user to the terminal device in limited network in limited network.
In above system, when certain in limited network enters dormant state with the terminal device of sleep mode, net
The request message that pass device is sent to the terminal device with sleep mode will be unable to be received.In this case, one is provided
The appropriate gateway apparatus of kind, it is reasonable to carry out to the data traffic of the energy-constrained network comprising the terminal device with sleep mode
Control and scheduling, thus guarantee interacting message it is smooth it is timely carry out, reduce network flow, reduce network congestion, improve net
Network efficiency, has become urgent problem to be solved.
For this problem, some solutions are proposed in the prior art.For example, in patent document 1, proposing one
Kind mechanism, gateway apparatus synchronize the terminal with sleep mode in the energy-constrained network that it is managed using application layer protocol
The dormancy information of equipment, using this synchronizing information when gateway apparatus control is sent to the transmission of energy-constrained network data
Between, to guarantee that the gateway apparatus can be suitable by the terminal device to the data that the terminal device with sleep mode is sent
Benefit receives.
Specifically, in patent document 1, what the agent node in energy-constrained network was managed has sleep mode
Terminal device suspend mode next time arrival before, by relation to this suspend mode the suspend mode moment and sleep time information be loaded into and answer
With in layer protocol, agent node, with the terminal equipment in communication of sleep mode, obtains the suspend mode using this application layer protocol
Information is simultaneously stored in local.Using the dormancy information, agent node can control and dispatch needs and is sent to sleep mode
Terminal device data.When the user from untethered network need to be located at energy-constrained network with sleep mode
When terminal device sends request message, request message is first sent to agent node, and agent node receives from the user
After request message, inquiry is stored in the local terminal with sleep mode about as the request message target to be accessed and sets
Standby dormancy information, if in a dormant state, request message is cached in local to target terminal equipment by agent node at this time,
Waiting terminal device is resumed work after state, and request message is sent to this terminal device by agent node.Meanwhile in order to reduce due to
The request delay of caching mechanism bring, agent node are being locally created terminal resource information storage area, are being used for constrained storage net
The resource information on the terminal device with sleep mode in network.When request message reaches agent node and target terminal equipment
When in a dormant state, if the resource information in the terminal resource information storage area can satisfy the need of request message
It asks, then agent node, which directly generates to reply message, is sent to user.In order to safeguard in the terminal resource information storage area
Resource information, the terminal device with sleep mode all actively send to agent node and request before entering dormant state every time
Message updates corresponding resource information.
Patent document 1: U.S. US2012/0151028A1
But in patent document 1, however it remains following technical problem:
(1) although being provided with request message caching mechanism on agent node in patent document 1 in energy-constrained network
To guarantee that the request message for being sent to energy-constrained network can be received by the terminal device with sleep mode, but do not consider
The caching capabilities of the agent node are buffered in the quantity of request message in the agent node without rationally control, are easy to make
At cache overflow.When request message caching overflows, request message may be lost, and then client is needed to carry out message weight
It passes, increases so as to cause network flow, network communication delay increases, communication efficiency reduction.
(2) part terminal resource information is stored in in patent document 1 by introducing the mechanism of agent node local, is being had
Have the terminal device of sleep mode in a dormant state when, can be reduced delay and reduce and be sent to the data flow of energy-constrained network
Amount.But in patent document 1, in view of the relevance between request message, for the terminal resource information that locally saves without
Method meets and mutually exists a plurality of request message of association (such as access purpose terminal is consistent), the agency in patent document 1
Node can only obtain corresponding resource information by the way that this message is sent to energy-constrained network one by one, it cannot be said that effectively subtract
The data traffic for being sent to energy-constrained network is lacked.
(3) the resource information maintenance mechanism that agent node used in patent document 1 is locally stored has sleep mode
Terminal device whenever enter dormant state before, all activly request energy-constrained network agent node updates in its agent node
The resource information of storage.But enter dormant state in the terminal device in the resource information that some terminal device enters before suspend mode to rise
It is always maintained in effective situation during until state of resuming work next time, using the agent node sheet in patent document 1
The resource information maintenance mechanism on ground, will occur unnecessary access, so that additional data flow can be introduced in energy-constrained network
Amount.
As described previously for the energy-constrained network comprising the terminal device with sleep mode, how to provide a kind of proper
When gateway apparatus, to carry out appropriate data traffic control, to mitigate gateway apparatus load, reduction is sent to resource-constrained net
The data traffic of network improves network efficiency, can not realize these mesh well with patent document 1 for the prior art of representative
's.
Summary of the invention
The present invention is for solving the above problems, it is intended that providing a kind of for comprising the terminal with sleep mode
Gateway apparatus, communication system and the flow control methods that the data traffic of the energy-constrained network of equipment is controlled and dispatched,
It can make that the request message quantity for being cached in the gateway apparatus is optimized and the data traffic for issuing the gateway apparatus obtains
To optimization, to further mitigate gateway apparatus load, network communication efficiency is improved.
In addition, the present invention also aims to provide a kind of gateway apparatus suitable for energy-constrained network and be locally stored
Resource information update method, the data traffic that introduces when updating the resource information of gateway apparatus storage can be reduced, subtracted
Light terminal equipment side network congestion situation, realizes the performance boost of energy-constrained network.
In addition, the present invention also aims to provide a kind of for coping with since energy-constrained network agent node caches
Overflow and caused by request message lose method, can reduce client request message retransmit and mitigate due to message weight
Send out bring delay.
To achieve the goals above, the present invention provides a kind of gateway apparatus, to including the terminal device with sleep mode
The communication that is participated in of limited network controlled comprising: request message receiving unit, receiving access target is
The request message of the above-mentioned terminal device with sleep mode in above-mentioned limited network；Request message analysis unit, for by upper
It states the above-mentioned request message that request message receiving unit receives to be parsed, obtains the information for including in above-mentioned request message；Please
Message Record portion is asked, referring to the information obtained by above-mentioned request message analysis unit, is received for by above-mentioned request message receiving unit
To above-mentioned request message establish and save request message record；Request message buffer unit, caching will be sent to above-mentioned with not
The request message of the terminal device of dormancy function；And request message cache management portion, it is protected according to above-mentioned request message record portion
The above-mentioned request message record deposited, the movement for caching above-mentioned request message to above-mentioned request message buffer unit is managed, above-mentioned
Request message cache management portion, when being judged as the spatial cache of above-mentioned request message buffer unit according to above-mentioned request message record
Man Shi is not buffered in above-mentioned request message buffer unit and is abandoned, and upper for received request message
It states and is added in the above-mentioned request message record corresponding with received above-mentioned request message that request message record portion is saved
Abandon mark.
According to the gateway apparatus, the size of the spatial cache cached in gateway apparatus to request message is considered, when upper
When stating the request message spatial cache in gateway apparatus has expired, currently received request message is abandoned, in request message record portion
Middle record discarding state, while notice client is replied message, there is sleep mode comprising next time in replying message
The time of the state of resuming work of terminal device, request message is lost caused by thus avoiding because of cache overflow, avoids visitor
The request message at family end retransmits, to reduce communication flows.
In addition, in gateway apparatus provided by the invention, above-mentioned request message cache management portion disappears when according to above-mentioned request
Breath record is judged as that received above-mentioned request message disappears with the first request for being cached in above-mentioned request message buffer unit
Manner of breathing simultaneously, does not cache in above-mentioned request message buffer unit received above-mentioned request message and is abandoned, and will be with
The corresponding above-mentioned request number of above-mentioned first request message as associated flag, be added to and protected in above-mentioned request message record portion
In the above-mentioned request message record corresponding with received above-mentioned request message deposited.
In addition, in gateway apparatus provided by the invention, above-mentioned request message cache management portion disappears when according to above-mentioned request
Breath record is judged as that received above-mentioned request message disappears with the second request for being cached in above-mentioned request message buffer unit
When the access target terminal device of breath is identical, received above-mentioned request message is not cached in above-mentioned request message buffer unit
And it is abandoned, and regard above-mentioned request number corresponding with above-mentioned second request message as associated flag, be added to above-mentioned
In the above-mentioned request message record corresponding with received above-mentioned request message that request message record portion is saved.
According to the gateway apparatus, the consistency and/or relevance of a plurality of request message are considered, for a plurality of identical request
Message only caches one, and only sends once to energy-constrained network, for mutually there is associated request message, can incite somebody to action
Multiple messages are merged into a transmission.Thus, it is possible to reduce the data traffic for the terminal device being sent in limited network.
In addition, also having resource information storage unit in gateway apparatus provided by the invention, which is used
It is located at the resource information of the above-mentioned terminal device with sleep mode in above-mentioned limited network, above-mentioned request message solution in storage
After analysis portion parses the above-mentioned request message as received by above-mentioned request message receiving unit, it is judged as above-mentioned resource information
When the above-mentioned resource information stored in storage unit can satisfy above-mentioned request message, according to institute in above-mentioned resource information storage unit
The above-mentioned resource information of storage replys above-mentioned request message.
According to the gateway apparatus, when the information stored in the resource information storage unit of gateway apparatus just can satisfy reception
When the requirement of the request message arrived, it is not necessary to access the terminal device in limited network, directly reply request message.By
This, can reduce the data traffic for being sent to limited network, can reduce network delay.
In addition, also there is resource information storage management portion, resource information storage in gateway apparatus provided by the invention
The above-mentioned resource information that management department stores above-mentioned resource information storage unit is managed, to guarantee that above-mentioned resource information is in
Effective state.
In addition, above-mentioned resource information is including at least in terminal device ID, resource in gateway apparatus provided by the invention
Appearance, effective time, Web Service time last time, above-mentioned resource information storage management portion, from above-mentioned last time resource information
From renewal time by effective time before, update the above-mentioned resource letter that will be failed that above-mentioned resource information storage unit stored
Breath.
In addition, in gateway apparatus provided by the invention, above-mentioned resource information further include the terminal device suspend mode next time moment,
Sleep time, above-mentioned resource information storage management portion are being judged as that above-mentioned resource information will be in above-mentioned suspend mode terminal device next time
When period fails, before above-mentioned suspend mode terminal device next time, this for updating that above-mentioned resource information storage unit stored will be lost
The above-mentioned resource information of effect.
According to the gateway apparatus, when the resource information only stored in the resource information storage unit of gateway apparatus will fail
The update of resource information is carried out, thereby, it is possible to reduce the data traffic for being sent to limited network.
In addition, in gateway apparatus provided by the invention, above-mentioned request message analysis unit, according to for being disappeared by above-mentioned request
The above- mentioned information that the above-mentioned request message that receiving unit receives is parsed and obtained are ceased, are judged as received above-mentioned request
When the above-mentioned request message with above-mentioned discarding mark saved in message and above-mentioned request message record portion records identical, on
It states request message record portion and above-mentioned Message Record is not established for received above-mentioned request message.
According to the gateway apparatus, when re-transmission request message is received by above-mentioned gateway apparatus, gateway apparatus is disappeared by request
It ceases record portion identification and retransmits message, and reset the request message queue in caching, repeating transmission message is enable to be handled as early as possible.
The present invention provides a kind of communication system, which is characterized in that has the described in any item gateway dresses of above-mentioned technical proposal
It sets.
The present invention passes through a kind of gateway apparatus, which is characterized in that any in above-mentioned technical proposal to be constituted with integrated circuit
Gateway apparatus described in.
The present invention provides flow control methods used in a kind of gateway apparatus, to including the terminal device with sleep mode
The communication that is participated in of limited network controlled, which is characterised by comprising: request message receives step
Suddenly, the request message that access target is the above-mentioned terminal device with sleep mode in above-mentioned limited network is received；Request disappears
Analyzing step is ceased, the above-mentioned request message received by above-mentioned request message receiving step is parsed, obtains above-mentioned ask
Seek the information for including in message；Request message recording step, the information that reference is obtained by above-mentioned request message analyzing step, for
It is established by the above-mentioned request message that above-mentioned request message receiving step receives and saves request message record；Request message caching
Step, caching will be sent to the request message of the above-mentioned terminal device with sleep mode；And request message cache management step
Suddenly, it is recorded according to the above-mentioned request message that above-mentioned request message recording step is saved, it is slow to above-mentioned request message caching step
The movement for depositing above-mentioned request message is managed, in above-mentioned request message cache management step, when according to above-mentioned request message
When record is judged as that the spatial cache of above-mentioned request message caching step has been expired, for received request message, not by it
Be buffered in above-mentioned request message caching step and abandoned, and above-mentioned request message recording step saved with connect
Addition abandons mark in the corresponding above-mentioned request message record of the above-mentioned request message received.
In accordance with the invention it is possible to which the data traffic for issuing energy-constrained network gateway apparatus is optimized, resource is reduced
Limited network data volume mitigates energy-constrained network jam situation, mitigates the request message in energy-constrained network gateway apparatus
It loses, reduces the repeating transmission message number of client, the final performance boost for realizing whole system network.
Detailed description of the invention
Fig. 1 is the comprising modules structure chart of gateway apparatus of the invention.
Fig. 2 is an example that gateway apparatus of the invention carries out control processing for the request message from untethered network
Flow chart.
Fig. 3 is another example that gateway apparatus of the invention carries out control processing for the request message from untethered network
Flow chart.
Fig. 4 is the process that gateway apparatus of the invention carries out control processing for the request message from gateway apparatus itself
Figure.
Fig. 5 is the flow chart that gateway apparatus of the invention handles replying message from energy-constrained network.
Fig. 6 is a concrete example of request message record sheet of the invention.
Fig. 7 is a concrete example of the resource information table that gateway apparatus of the invention is locally stored.
Fig. 8 is the concrete example of the request message record sheet in the update that the embodiment of the present invention 1 is related to.
Fig. 9 is the concrete example for the updated request message record sheet that the embodiment of the present invention 1 is related to.
Figure 10 is the specific format of the request message transmitted in energy-constrained network that the embodiment of the present invention 1 is related to.
Figure 11 is the concrete example for the request message that the embodiment of the present invention 1 is related to.
Figure 12 is the concrete example for the request message that the embodiment of the present invention 1 is related to.
Figure 13 is the concrete example replied message that the embodiment of the present invention 1 is related to.
Figure 14 is the concrete example replied message that the embodiment of the present invention 1 is related to.
Figure 15 is the concrete example of the request message record sheet in the update that the embodiment of the present invention 2 is related to.
Figure 16 is the concrete example for the updated request message record sheet that the embodiment of the present invention 2 is related to.
Figure 17 is the concrete example for the request message that the embodiment of the present invention 2 is related to.
Figure 18 is the concrete example for the request message that the embodiment of the present invention 2 is related to.
Figure 19 is the concrete example replied message that the embodiment of the present invention 2 is related to.
Figure 20 is the concrete example replied message that the embodiment of the present invention 2 is related to.
Figure 21 is the concrete example for the request message record sheet that the embodiment of the present invention 3 is related to.
Figure 22 is the concrete example for the updated request message record sheet that the embodiment of the present invention 3 is related to.
Figure 23 is the concrete example for the updated request message record sheet that the embodiment of the present invention 3 is related to.
Figure 24 is the concrete example for the updated request message record sheet that the embodiment of the present invention 3 is related to.
Figure 25 is the comprising modules structure chart of communication system of the invention.
Specific embodiment
Firstly, illustrating the network flow type that the present invention is controlled.The present invention is to the flow for being sent to energy-constrained network
It is controlled.Because all flows for introducing energy-constrained network are actually initiated by gateway apparatus, in the gateway apparatus
Upper implementation control.The request message type that energy-constrained network is sent to from gateway apparatus includes two kinds: one is from untethered
The request message of network, another kind are to update the request message that local resource information is issued by gateway apparatus itself.Therefore, originally
Invention will be controlled for above two message, reduce the flow for introducing energy-constrained network.
In the following, being illustrated referring to Fig.1 to the comprising modules of gateway apparatus of the invention.
As shown in Figure 1, gateway apparatus 10 of the invention include: untethered network communication interface 1, request message analysis unit 2,
Request message record portion 3, request message cache management portion 4, request message buffer unit 5, limited network communication interface 6, at reply
Reason portion 7, resource information storage unit 8 and resource information storage management portion 9.
Untethered network communication interface 1 is used for and the user of untethered network communicates, positioned at the use of untethered network
When family needs to access the terminal device for being located at energy-constrained network, transmitted request message arrives first at untethered network communication
Interface 1.
Request message analysis unit 2 extracts source address, requesting party for parsing the request message from untethered network
The information such as method, request content, arrival time, and be supplied to request message record portion 3 and do subsequent processing.
Request message record portion 3 is requested according to the message information obtained from request message analysis unit 2 locally thus
Message establishes request record, in addition, only recording the request for not returning also currently and accordingly replying to user in request message record portion 3
Message, for the request message having responded to, gateway apparatus 10 will be deleted its corresponding record.
In the information management request message buffer unit 5 that request message cache management portion 4 is saved according to request message record portion 3
Request message, to implement function such as: for target be same terminal device a plurality of same request information, only cache one
Item, so that the repetition for reducing the same request message that target is same terminal device is sent.It is same terminal device for target
A plurality of different solicited messages, be combined caching, request to disappear to reduce to the greatest extent and be sent to the different of same target terminal equipment
The data traffic of breath.In addition, when the request message quantity saturation in request message buffer unit 5, request message cache management portion 4
Newly arrived request message can be abandoned, to prevent cache overflow, while this request message recorded in request message record portion 3
Record in addition abandon mark, for detecting the repeating transmission of this request message.
Request message buffer unit 5 is set for caching the request message that will be sent to terminal device when inquiring target terminal
It is standby in a dormant state when, request message is cached in request message buffer unit 5 by gateway apparatus 10.
Limited network communication interface 6 is used to be communicated with the terminal device in limited network, when terminal device is in work
When making state, gateway apparatus 10 sends request message to target terminal equipment.
Reply processing portion 7 guarantees that different replying message can be turned for handling replying message from terminal device
It is sent to two different request sources, i.e., the client or gateway apparatus 10 itself of untethered network.
Resource information storage unit 8 is used to store the resource information that the terminal device in limited network is related to, the resource
Information include the address of terminal device, next dormancy time, sleep time, comprising resource type (such as temperature, humidity, light intensity
Deng), the information such as resource numerical value (such as 30 degrees Celsius, 50,70 etc.).When the demand of request message from the user can be by resource
When information storage part 8 meets, gateway apparatus 10 replies message according to the resource information generation in resource information storage unit 8 and sends back to use
Family so as to reduce the data traffic for introducing energy-constrained network, while decreasing message delay.
Resource information storage management portion 9 is stored for the resource information in management service resource information storage unit 8, guarantee
Resource information be in effective state.Specifically, resource information storage management portion 9 is set in certain terminal with sleep mode
Before entering dormant state, according to being somebody's turn to do in limited network stored in dormancy information and resource information storage unit 8
Terminal device resource information, judges whether the terminal device resource information stored in resource information storage unit 8 needs to update,
In the case where being judged as that needs update, request is issued to the terminal device in limited network, to update in resource information
The resource information of the terminal device stored in storage unit 8.
In the following, being carried out at control to gateway apparatus of the invention for the request message from untethered network referring to Fig. 2
One example of the process of reason is illustrated.
As shown in Fig. 2, after processing starts, when gateway apparatus 10 receives user's request in untethered network communication interface 1
When message (step S101), request message analysis unit 2 first parses the request message, obtain source address, requesting method,
The information such as request content, arrival time (step S102).Later, new request message note is generated in request message record portion 3
It records table clause (step S103).Whether subsequent inquiry request message record (step S104), judge request message spatial cache
Full (step S105).If having expired (being yes in step S105), this request message is abandoned, while being saved in request message record portion 3
Simultaneously discarding mark is arranged in record in relation to this request message, and regeneration discard notification is replied user (step S106), terminated later
This processing.If request message buffer unit 5 still has space (being no in step S105), which is placed in request and is disappeared
It ceases in buffer unit 5, arranges buffer queue (step S107) by arrival time, terminal device is waited to wake up, it is logical via limited network
Letter interface 6, which sends request message (step S108), terminates this processing later.
As a result, if request message spatial cache has been expired, which is abandoned, is built in request message record portion
Vertical request message records and discarding mark is arranged, so that user terminal retransmitting message caused by avoiding spatial cache from overflowing, reduces
Communication flows.
In the following, being carried out at control to gateway apparatus of the invention for the request message from untethered network referring to Fig. 3
Another example of the process of reason is illustrated.
As shown in figure 3, after processing starts, when gateway apparatus 10 receives user's request in untethered network communication interface 1
When message (step S101), request message analysis unit 2 first parses the request message, obtain source address, requesting method,
The information such as request content, arrival time (step S102).Later.The request message analysis unit 2 is further disappeared by inquiry request
Record portion 3 is ceased, carries out repeating transmission identification to according to the request message, judges whether the request message is to retransmit message (step
S1103).If it is determined that retransmitting message (being yes in step S1103), then priority (step is set in request message record portion 3
Rapid S1104), the method that priority is arranged is, for example, that arrival time is set as the arrival time that the solicited message reaches for the first time.Only
It wants to be ranked up request message, it can also be using the method for other setting priority.If it is determined that not being to retransmit
Message (being no in step S1103), then enter step S103, and new request message record is generated in request message record portion 3
Table clause.Then, 4 inquiry request message record portion 3 of request message cache management portion determines current request message with caching at present
In the request message in request message buffer unit 5 or the pass of request message that has been sent to energy-constrained network but has not replied also
Connection, and judge whether there is association (step S1204, S1205) if it is determined that there is association (being yes in step S1204), then exist
Associated flag is set in request message record portion 3, while updating the request message (step S1206) in request message buffer unit 5,
Terminate this processing later.In step S1206, specific update method is: the same request for being sent to same terminal device disappears
Breath, only needs to send a message in energy-constrained network side；It, will not for being sent to the different request messages of same terminal device
The buffered message new as one is added into the buffer queue of request message buffer unit 5, but disappears with associated request
Breath merges into a message.Since request message belongs to application layer scope, multiple request messages can be by same lower layer's header
Carrying, including transport layer, network layer and link layer, reduce the flow of introducing.If not finding association (in step S1204
It is no), then S104 is entered step, and continue to execute the processing of step S104~S108, the processing difference of step S104~S108
It is identical as the processing of step S104~S108 in above-mentioned Fig. 2, it omits the description herein.
As a result, if having stored a message in request message buffer unit 5 or a message has been sent from but also
Reply is not received, for, there are associated request message, not adding between the request message that caches in request message buffer unit 5
Duplicate request message extremely caches, but waits and replying message, and reduces communication flows as a result,.
In addition, the processing of step S1103~S1104 in Fig. 3, the processing of step S1204~S1206 can save respectively
Slightly, when the two is omitted simultaneously, that is, embodiment identical with Fig. 2 is constituted.
In the following, illustrating the control for the request message from energy-constrained network gateway apparatus itself of the invention and tune
The process of degree.
As shown in figure 4, terminal is inquired in resource information storage management portion 9 first before terminal device enters dormant state
The current state (step S201) of equipment.If terminal device is incited somebody to action for a long time in running order (being no in step S201),
It is inquired next time.If terminal device will enter dormant state (being yes in step S201), query resource information is deposited
Storage portion 8 determines whether that resource needs to update (step S202).Dormant state will be entered, such as referred to, apart from terminal device
Into dormant state, there are also stipulated times, for example, 10 seconds, and certainly, which can believe according to network state, resource
Breath number suitably set.(it is in step S203 if resource information is still valid in next terminal device sleep time
It is no), then without update (step S204).If resource information is no longer valid or will be in next terminal device sleep time
It fails (being yes in step S203), then the resource information needs to update, and constructs resource information more by resource information storage management portion 9
New request message (step S205), is then sent to corresponding terminal device via limited network communication interface 6, to carry out resource letter
The update (step S206) of breath.
Request message type due to being sent to energy-constrained network from gateway apparatus includes two kinds: one is from untethered
The request message of the network user, another kind are to update resource information and storing the request message issued by gateway apparatus itself, institute
It needs to properly process in gateway apparatus to reply message with reply processing portion 7, guarantees that different replying message can be forwarded to just
True request source.It is as shown in Figure 5 for the process flow replied message from energy-constrained network.Energy-constrained network gateway
Device replies message whether reach (step S301) in the judgement of limited network communication interface 6.When be judged as do not reach when (step
It is no in S301), it repeats step S301 and is reached until replying message.When being judged as that having received the reply from terminal device disappears
After breath (being yes in step S301), reply processing portion 7 is parsed to replying message first, obtains message id, resource data etc.
Information, while according to this information inquiring request Message Record portion 3(step S302).Request message note is judged whether there is later
Record, to judge that this replies message corresponding request source (step S303), if disappeared in request message record portion 3 without corresponding
It is no for ceasing in ID(step S303), then it is determined as that request source is gateway apparatus itself, subsequent resource information storage management portion 9 obtains
Return information simultaneously imports in resource information storage unit 8 (step S304), and then resource information storage unit 8 updates corresponding resource letter
It ceases (step S305), terminates this processing later.If there are identical message id (step S303 in request message record portion
In be yes), then be determined as that request source is from user, subsequent reply processing portion 7 is according to the use obtained from request message record portion 3
Family information (step S306), and construct and reply message (step S307), it is then forwarded to the corresponding user's (step of above-mentioned message id
S308), terminate this processing later.
Table shown in fig. 6 indicates that request message records tableau format.In table include the relevant information of request message, such as asks
Ask ID, address information, request content, arrival time and association type of other request messages etc..Wherein, request ID is for marking
Know the request message from untethered network, in gateway apparatus and energy-constrained network but also has not been sent to for current cache
The request message of reply, the ID must assure that uniqueness, and all request messages for being sent to energy-constrained network are both needed to add this ID,
And the ID replied message that terminal device generates must be consistent with corresponding request message ID.Source address is from untethered net
The source address of the request message of network is station address.Destination address is the address of terminal device in energy-constrained network.Requesting party
Method refers to the requesting method of the request message, can be querying method either control method.Request content refers to that the request disappears
The content of breath: for querying method, content is the object of inquiry, such as temperature, humidity information on terminal device, for control
Method should then include the object of control, and the numerical value of control.Arrival time refer to request message reach gateway apparatus when
Between.Whether cache tag is just being cached in the request message buffer unit of gateway apparatus for identification request message, indicates that this is asked with 1
Message is asked just to be stored in request message buffer unit, 0 indicates the request message not in request message buffer unit.Association type is for marking
Whether know the request message with other message presence association and associated type in request message record portion: 1 indicates purpose
Address and the identical request message of request content, the 2 expression request messages that destination address is identical but request content is different, 0
Indicate that there is no associations.It is associated with ID, request message associated by association type is indicated, with the request ID of associated request message
It indicates, default value 0, represents and association is not present.Mark is abandoned, this mark is set after caching completely abandons request message, is used
It is detected in retransmitting, 1 indicates to have abandoned, and 0 indicates not abandon.
Table shown in Fig. 7 indicates resource information storage resource tableau format.It include to be stored in resource information storage in table
Relevant information in relation to terminal device resource, such as resource content, effective time, renewal time, sleep time etc..Wherein resource
Content includes the type of the resource, data, the information such as terminal device of representative, can according to need the more contents of addition.Effectively
Duration refers to the duration that the resource is able to maintain that effective status for service request information.Renewal time refers to the resource
Renewal time last time, for judging whether the resource is effective, naturally it is also possible to be the time that should be updated next time.Sleep time is
The next suspend mode duration for referring to the terminal device that the resource represents, for judging whether the resource needs to update.
Embodiment 1
Hereinafter, referring to Fig. 6,8~14 embodiments 1 of the explanation based on above embodiment.
Imagine the user for being located at untethered network, address 10.1.1.3, it is desirable to which inquiry is located at the ground of energy-constrained network
Location is the temperature data on the terminal device of 192.168.1.1.User constructs inquiry request message, includes inquiry request method,
Inquiry content is temperature, and destination address is terminal device 192.168.1.1, is then sent to the non-of energy-constrained network gateway apparatus
Limited network communication interface.
If target terminal equipment currently has two still in dormant state when this request message is received by gateway apparatus
A request message is just being cached in request message buffer unit, and one has request ID101, and one has request ID102, at this time
Request message record sheet is as shown in Figure 6.Then, the request message analysis unit of gateway apparatus parses this request message, and
Carry out repeating transmission detection.Because the discarding mark of two request messages at this time in request message record sheet is 0, represents to be not present and lose
Message is abandoned, so current request message is new information.Later, gateway apparatus request message thus in request message record sheet
New request record entry is created, and setting unit content, the request message record sheet after setting are as shown in Figure 8.At this point, random
Select the 103 request ID as this request message for being different from other ID values, but association type, association ID and discarding mark
It is not set, cache tag be 0 represent at this time this request message not in request message buffer unit.Then, gateway apparatus carries out
Association detection, inquiry current request message are associated with the request message in request message buffer unit.Pass through inquiry request message
Record sheet, discovery current request message and ID for 101 request message target terminal equipment having the same and identical ask
Method and request content are asked, therefore, this request message will not be passed to request message buffer unit by gateway apparatus, while pass is arranged
Joining type is 1, and representative is identical with the destination address of another message in table and message content, and setting association ID is 101, generation
Table exists with the request message that request ID is 101 in table to be associated with.Request message record sheet after setting is as shown in Figure 9.Then, net
Pass device waiting target terminal equipment is resumed work after state, is respectively 101 and 102 request two request ID in caching
Message is sent to corresponding terminal device via limited network communication interface.In the table of Fig. 9, association type field is contained, but should
Association type field is not required, that is, as embodiments of the present invention, is also possible to judge current request message and be delayed
When certain request message deposited has association, only setting is associated with ID.
The request message format transmitted in energy-constrained network is as shown in Figure 10, and ID is asking in request message record sheet
ID is sought, destination address is target terminal device address, and method is the requesting method in request message record sheet, and content is that request disappears
Cease the request content in record sheet.Therefore, the format of two request messages is as shown in Figure 11, Figure 12.
After a period of time, the limited network communication interface of gateway apparatus will be respectively received two and reply message, format
As shown in figs. 13 and 14, an ID replied message is 101, and an ID replied message is 102.Pass through inquiry request message
There is identical request ID in record sheet, discovery, determine that the request source that the two are replied message comes from untethered network.Meanwhile
It is associated with it was found that the request message that request ID is 103 exists with the request message that ID is 101, and association type is 1, with representing target
Location is completely the same with message content, so ID is 101 to reply message content equally and can satisfy the demand of request message 103.
Subsequent gateway apparatus, which replies message this, is sent respectively to user 10.1.1.1 and user 10.1.1.3.Time for being 102 for ID
Multiple message, does not find to be associated with, then replies message this and be sent to user 10.1.1.2.Sent 3 reply message after, system
3 entries corresponding in request message record sheet are deleted.
Flow control according to the present invention and dispatching method as a result, can be avoided identical request message and be cached in gateway
Device and it is repeatedly sent to energy-constrained network, the data traffic for issuing gateway apparatus is optimized, to further subtract
Light gateway apparatus load, improves network efficiency.
Embodiment 2
In the following, illustrating embodiment 2 referring to same 6,15~20.Imagine the user for being located at untethered network, address is
10.1.1.4, it is desirable to which control is located at the address of energy-constrained network for the temperature data on the terminal device of 192.168.1.1.With
Family building control request message, comprising control requesting method, control content is temperature, and destination address is terminal device
192.168.1.1, then it is sent to the untethered network communication interface of energy-constrained network gateway apparatus.
If target terminal equipment currently has two still in dormant state when this request message is received by gateway apparatus
A request message is just being cached in request message buffer unit, and one has request ID101, and one has request ID102, at this time
Request message record sheet is as shown in Figure 6.Then, this request message of Gateway devices resolves, and carry out repeating transmission detection.Because asking at this time
The discarding mark for seeking two request messages in Message Record table is 0, is represented there is no message is abandoned, so current request disappears
Breath is new information.Later, request message creates new request record entry to gateway apparatus thus in request message record sheet, and
Setting unit content, the request message record sheet after setting are as shown in figure 15.At this point, random selection one is different from other ID values
The 104 request ID as this request message, but association type, association ID and abandon mark it is not set, cache tag be 0 generation
Table at this time this request message not in request message buffer unit.Then, gateway apparatus is associated detection, and inquiry current request disappears
Breath is associated with the request message in request message buffer unit.By inquiry request message record sheet, current request message is found
The request message target terminal equipment having the same for being 101 with ID, but request message content is different, therefore, gateway apparatus
This request message will be merged with the request message for being 101 of ID in caching, the two request messages is made to share identical transmission
Layer, network layer and link layer header, while it is 2 that association type, which is arranged, is represented identical as the destination address of another message in table
But message content is different, and setting association ID is 101, represents with request ID in table as 101 request message in the presence of being associated with.After setting
Request message record sheet it is as shown in figure 16.Then, gateway apparatus waits target terminal equipment to resume work after state, caching
In two request ID be respectively that 101 and 102 request message is sent to corresponding terminal device via limited network communication interface.
The format of two request messages is as shown in Figure 17, Figure 18.
In addition, containing association type field, but the association type field is not required in the table of Figure 16, that is, as
Embodiments of the present invention, when being also possible to judge current request message with certain request message cached in the presence of being associated with, only
Setting association ID.
After a period of time, the limited network communication interface of gateway apparatus will be respectively received two and reply message, format
As shown in Figure 19, Figure 20, an ID replied message is 101, and an ID replied message is 102.Pass through inquiry request message
There is identical request ID in record sheet, discovery, determine that the request source that the two are replied message comes from untethered network.Meanwhile
It is associated with it was found that the request message that request ID is 104 exists with the request message that ID is 101, and association type is 2, represents destination
Location is consistent, and content merges, so ID is 101 to reply message in content and ask comprising can satisfy the demand of request message 104
Seek message content.This is replied message content separation by subsequent gateway apparatus, and is sent respectively to user 10.1.1.1 and user
10.1.1.4.It is 102 to reply message for ID, does not find to be associated with, then this is replied message and be sent to user 10.1.1.2.
Sent 3 reply message after, system deletes 3 entries corresponding in request message record sheet.
Flow control according to the present invention and dispatching method as a result, the difference for being sent to same target terminal device are asked
Message is sought, the merging of message content may be implemented, the data traffic for issuing gateway apparatus is optimized, to further mitigate
Gateway apparatus load, improves network efficiency.
Embodiment 3
In the following, illustrating embodiment 3 referring to Figure 21~Figure 24.Imagine the user for being located at untethered network, address is
10.1.1.5, it is desirable to which inquiry is located at the address of energy-constrained network for the temperature data on the terminal device of 192.168.1.5.With
Family constructs inquiry request message, includes inquiry request method, and inquiry content is temperature, and destination address is terminal device
192.168.1.5, then it is sent to the untethered network communication interface of energy-constrained network gateway apparatus.
When this request message is received by gateway apparatus, target terminal equipment is still in dormant state at this time, and at this time
Request message record sheet is as shown in figure 21.At this point, having there is 4 request messages to be buffered in gateway apparatus.Then, gateway apparatus
This request message is parsed, and carries out repeating transmission detection.Because the discarding mark of the request message in request message record sheet is equal at this time
It is 0, represents there is no message is abandoned, so current request message is new information.Later, gateway apparatus is recorded in request message
Request message creates new request record entry thus in table.Newly created entry is as shown in figure 22.At this point, gateway apparatus is found
The spatial cache of request message buffer unit has been expired, and therefore, this request message is dropped.Meanwhile being arranged in this request message entry
Discarding mark be 1, as shown in figure 23.Then, gateway apparatus constructs discard notification message back to user, the notification message packet
Resume work the time of state containing target terminal equipment next time, allows user's reasonably Selective resending time.Meanwhile gateway
Device saves the request message record sheet entry information of this request message.
After a period of time, user sends identical request message again, and request message record sheet is as shown in figure 24 at this time.If
The request message that ID is 103 and 104 at this time is processed and returns to user, the record thus in relation to this two message
Entry is deleted, and the request message that ID is 101 and 102 is still untreated, is stored in request message buffer unit, meanwhile, currently have
One new request message, the request message of ID106 have arrived at gateway apparatus and have been saved to request message buffer unit.
This request message of Gateway devices resolves later, and carry out repeating transmission detection.It was found that it is 1 that the request message that ID is 105, which abandons mark, and
It is completely the same with current request Message Source Address, destination address and message content, current request message is represented to retransmit message.This
When, new request record entry is not established, and does not update the arrival time of entry.Then, right in request message buffer unit
When request message is ranked up, queue sequence can be arranged according to arrival time.Therefore, although the time of current request message is practical
Arrival time is later than the request message that ID is 106, but before the request message that request ID is 106 will be come in the queue
Face makes it quickly obtain service response, reduces delay.
As a result, it is according to the present invention for cope with as energy-constrained network gateway apparatus cache overflow and caused by request
The method of information drop-out, the request message that can reduce client are retransmitted and are mitigated since message retransmission bring postpones.
Embodiment 4
Illustrate embodiment 4 below.In the present embodiment, gateway apparatus needs carry out before terminal device enters dormant state
Resource information storage resource updates.
Resource information storage resource table at this time in resource information storage unit is as shown in Figure 7.Assuming that current time is 20:
34:30, and terminal device 192.168.1.1 and 192.168.1.2 will enter dormant state at the 20:35:00 moment.
The temperature resource on terminal device 192.168.1.1 has currently been lost according to resource information storage resource table
Effect, so needing to update；For the humidity resource on terminal device 192.168.1.1, although the currently active, can be set in terminal
Failure in standby next sleep time, so needing to update；For the light intensity resource on terminal device 192.168.1.2, currently
Effectively, and it is still effective in the next sleep time of terminal device, so not needing this time to update.Then, gateway apparatus
Two request messages are constructed, includes querying method, goes to obtain corresponding resource information, message format equally follows shown in Figure 10,
Selected ID must be inconsistent with the ID of all message entries in request message record sheet at this time.
When more new resources reply message received by gateway apparatus after, gateway apparatus inquiry request message record sheet, discovery
Not with reply message the request message entry with identical ID, it is determined that the request source replied message is gateway apparatus sheet
Body.Then, gateway apparatus extracts the resource information in message, and updates resource information storage resource table.
Flow control according to the present invention and dispatching method as a result, can be reduced when resource information is stored and updated more
The data traffic introduced when the resource information that new gateway device resource information stores, mitigates the congestion feelings of energy-constrained network
Condition realizes the performance boost of energy-constrained network.
Hereinafter, being illustrated in conjunction with Figure 25 to communication system of the invention.
Figure 25 is the block diagram for schematically showing communication system 100 of the invention.As shown in figure 25, communication system of the invention
System 100 includes client terminal device 20, gateway apparatus 10 and server unit 30, wherein client terminal device 20 is via untethered
Network is connected with gateway apparatus 10, and gateway apparatus 10 is connect with server unit 30 via limited network.
Server unit 30 shown in Figure 25 can be one, be also possible to more.Also, the class of server unit 30
Type is not particularly limited, and can be common server unit, is also possible to the server unit with sleep mode.
In addition, one of the constituent element that gateway 10 of the invention, client terminal device 20, server unit 30 have
Divide or can also be all made of a system LSI (Large Scale Integration: large scale integrated circuit).System
LSI is, by the integrated super multi-functional LSI of manufacture on a single die of multiple constituting portion, specifically, being includes micro process
The computer system of device, ROM (Read Only Memory), RAM (Random Access Memory) etc. and composition.ROM is deposited
Contain computer program.Microprocessor works according to computer program, and accordingly, system LSI realizes its function.
Moreover, here, referred to as LSI still according to integrated level difference, has referred to as IC, system LSI, super LSI, spy
The case where big LSI.Also, for the method for integrated circuit, it is not limited only to LSI, it can also be with special circuit or general procedure
Device is realized.Also it can use FPGA (the Field Programmable Gate Array: existing that can be programmed after manufacturing LSI
Field programmable gate array) or restructural LSI inside circuit unit connection and setting reconfigurable processor.
In turn, certainly, if because the progress of semiconductor technology or derived from others technology due to there is integrated electricity instead of LSI
It is integrated to functional block progress then to can use its technology for the technology on road.A possibility that there are applications of biotechnology etc..
More than, gateway apparatus of the invention, communication system and flow control methods are illustrated, still, this
Invention is not limited only to such embodiment.Without departing from spirit of the invention, the technology of this field is implemented to each the present embodiment
The forms of the various modifications that personnel expect or constituent element in the different embodiment of combination and the form constituted, are also contained in
In the scope of the present invention.
Claims (11)
1. a kind of gateway apparatus, the communication participated in the limited network comprising the terminal device with sleep mode is controlled
System comprising:
Request message receiving unit, receiving access target is the above-mentioned terminal device with sleep mode in above-mentioned limited network
Request message；
Request message analysis unit parses the above-mentioned request message received by above-mentioned request message receiving unit, obtains
The information for including in above-mentioned request message；
Request message record portion is received referring to the information obtained by above-mentioned request message analysis unit for by above-mentioned request message
The above-mentioned request message that portion receives is established and saves request message record；
Request message buffer unit, caching will be sent to the above-mentioned request message of the above-mentioned terminal device with sleep mode；And
Request message cache management portion is recorded according to the above-mentioned request message that above-mentioned request message record portion is saved, to above-mentioned
The movement that request message buffer unit caches above-mentioned request message is managed,
Above-mentioned request message cache management portion is judged as the slow of above-mentioned request message buffer unit when recording according to above-mentioned request message
When depositing space has expired, for received above-mentioned request message, it is not buffered in above-mentioned request message buffer unit and is incited somebody to action
It is abandoned, and the above-mentioned request corresponding with received above-mentioned request message saved in above-mentioned request message record portion disappears
Addition abandons mark in breath record, while replying message notice client, has suspend mode comprising next time in replying message
The time of the state of resuming work of the terminal device of function.
2. gateway apparatus as described in claim 1, which is characterized in that
Above-mentioned request message cache management portion, when being judged as received above-mentioned request message according to above-mentioned request message record
When identical as the first request message for being cached in above-mentioned request message buffer unit, delay not in above-mentioned request message buffer unit
It deposits received above-mentioned request message and is abandoned, and above-mentioned request number corresponding with above-mentioned first request message is made
By associated flag, be added to above-mentioned request message record portion save it is corresponding with received above-mentioned request message on
It states in request message record.
3. gateway apparatus as described in claim 1, which is characterized in that
Above-mentioned request message cache management portion, when being judged as received above-mentioned request message according to above-mentioned request message record
When identical as the access target terminal device of the second request message for being cached in above-mentioned request message buffer unit, not above-mentioned
Received above-mentioned request message is cached in request message buffer unit and is abandoned, and will be with above-mentioned second request message pair
The above-mentioned request number answered as associated flag, be added to above-mentioned request message record portion saved with it is received upper
It states in the corresponding above-mentioned request message record of request message.
4. gateway apparatus as claimed any one in claims 1 to 3, which is characterized in that
Also there is resource information storage unit, what which was used to store in the above-mentioned limited network above-mentioned has
The resource information of the terminal device of sleep mode,
After above-mentioned request message analysis unit parses the above-mentioned request message as received by above-mentioned request message receiving unit,
When being judged as that the above-mentioned resource information stored in above-mentioned resource information storage unit can satisfy above-mentioned request message, according to above-mentioned
The above-mentioned resource information that is stored in resource information storage unit replys above-mentioned request message.
5. gateway apparatus as claimed in claim 4, which is characterized in that
Also there is resource information storage management portion, which stores above-mentioned resource information storage unit
Above-mentioned resource information is managed, to guarantee that above-mentioned resource information is in effective state.
6. gateway apparatus as claimed in claim 5, which is characterized in that
Above-mentioned resource information includes at least terminal device ID, resource content, effective time, Web Service time last time,
Above-mentioned resource information storage management portion, before from the above-mentioned last time Web Service time by effective time, more
The above-mentioned resource information that will be failed that new above-mentioned resource information storage unit is stored.
7. gateway apparatus as claimed in claim 6, which is characterized in that
Above-mentioned resource information further includes terminal device suspend mode next time moment, sleep time,
Above-mentioned resource information storage management portion is being judged as that above-mentioned resource information will lose during above-mentioned suspend mode terminal device next time
When effect, before above-mentioned suspend mode terminal device next time, update that above-mentioned resource information storage unit stored this will fail it is upper
State resource information.
8. gateway apparatus as described in claim 1, which is characterized in that
Above-mentioned request message analysis unit is solved according to for the above-mentioned request message received by above-mentioned request message receiving unit
Analysis and the above- mentioned information obtained are judged as and are saved in received above-mentioned request message and above-mentioned request message record portion
When above-mentioned request message with above-mentioned discarding mark records identical, above-mentioned request message record portion is for received above-mentioned
Request message does not establish above-mentioned Message Record.
9. a kind of communication system, which is characterized in that
Has gateway apparatus described in any one of the claims 1 to 8.
10. a kind of gateway apparatus, which is characterized in that
For gateway apparatus described in any one of the claims 1 to 8 for being constituted with integrated circuit.
11. flow control methods used in a kind of gateway apparatus, to the limited network comprising the terminal device with sleep mode
The communication participated in is controlled, which is characterised by comprising:
Request message receiving step, receiving access target is the above-mentioned terminal device with sleep mode in above-mentioned limited network
Request message；
Request message analyzing step parses the above-mentioned request message received by above-mentioned request message receiving step,
Obtain the information for including in above-mentioned request message；
Request message recording step, referring to the information obtained by above-mentioned request message analyzing step, for by above-mentioned request message
The above-mentioned request message that receiving step receives is established and saves request message record；
Request message caching step, caching will be sent to the request message of the above-mentioned terminal device with sleep mode；And
Request message cache management step is recorded according to the above-mentioned request message that above-mentioned request message recording step is saved, right
The movement that above-mentioned request message caching step caches above-mentioned request message is managed,
In above-mentioned request message cache management step, it is judged as that above-mentioned request message caches when recording according to above-mentioned request message
When the spatial cache of step has been expired, for received request message, it is not buffered in above-mentioned request message caching step
In and abandoned, and above-mentioned request message recording step saved it is corresponding with received above-mentioned request message on
It states addition in request message record and abandons mark, while replying message notice client, next time is included in replying message
The time of the state of resuming work of terminal device with sleep mode.
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| CN105553874A (en) * | 2015-12-17 | 2016-05-04 | 浪潮(北京)电子信息产业有限公司 | Flow control method and system for NAS gateway of distributed file system |
| CN108370372B (en) | 2016-02-22 | 2021-07-09 | 华为技术有限公司 | Data packet transmission method, network side equipment and user equipment |
| CN105933728A (en) * | 2016-04-20 | 2016-09-07 | 乐视控股（北京）有限公司 | Playing request method, device, and system |
| SG11202105928UA (en) * | 2018-12-13 | 2021-07-29 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Subscription message processing method and apparatus, and computer device and storage medium |
| CN111078651A (en) * | 2019-12-23 | 2020-04-28 | 浪潮云信息技术有限公司 | Method and device for counting usage amount of object storage |
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