CN102685203A - Method and equipment for data resource transmission - Google Patents

Abstract

The embodiment of the invention provides a method and equipment for data resource transmission in a machine to machine system. The method for transmitting data resources of a node based on a constrained application protocol in the machine to machine system by blocks comprises the following steps of: acquiring data resource capacity information of the node, wherein the resource capacity information is the capacity size of data to be transmitted; sending a request message in which a first block option is carried to the node, wherein the first block option comprises recommended block capacity; receiving a response message, in which a second block option is carried, of the node, wherein the second block option comprises determined block capacity; and transmitting the data resources of the node by blocks according to the determined block capacity and data resource capacity information of the node. According to the embodiment of the invention, the capacity information of the data resources, required to be transmitted, of the node, can be acquired, the block capacity used during data transmission is determined by block capacity negotiation, therefore, error rate reduction during transmission can be realized, and data can be concurrently transmitted.

Description

The method and apparatus of data resource transmission

Technical field

The embodiment of the invention relates to network communication field, and relates more specifically to the method and apparatus of data resource transmission.

Background technology

Lightweight application layer protocol (Constrained Application Protocol; Be called for short " CoAP ") mainly be to be used for Internet of Things (Machine to Machine; Abbreviation " M2M ") in the scene, such as: tame chamber controller, building automatic, intelligent energy, sensor network etc.In such environment, the function of these machines is fairly simple, and general processor has only 8, and memory space is little, does not support complicated host-host protocol, and message transmission rate is also lower.CoAP provides a kind of interactive mode of request, supports embedded resource discovering, comprises crucial webpage notion, such as unified resource sign (URI) and content type.CoAP can translate hypertext link agreement (HTTP) at an easy rate, is used for being integrated into network.Based on the accurate capacity of calculated data resource not in the traditional scheme of CoAP transmission data, can't assess the exact number of subpackage, therefore can't concurrently obtain data resource, cause efficiency of transmission low.

Summary of the invention

The embodiment of the invention provides a kind of method and apparatus of data resource transmission, can be supported in and improve efficiency of transmission among the CoAP.

In an embodiment of the present invention; A kind of method that in Internet of things system, improves efficiency of transmission based on the lightweight application layer protocol has been proposed; Can come the data resource of transmission node through burst; Comprise: obtain the data resource capacity information of node, resource capacity information is the data to be transmitted amount of capacity; Send the request message that carries the first burst option to node, wherein the first burst option comprises the burst capacity of recommendation; Receiving node carries the response message of the second burst option, and wherein the second burst option comprises definite burst capacity, and definite burst capacity is less than or equal to the burst capacity of recommendation; According to the burst capacity of confirming and the data resource capacity information of node, the data resource of slicing transmission node.

In embodiments of the present invention; Provide a kind of in Internet of things system the method based on the data resource of lightweight application layer protocol through the slicing transmission node; The request message of the first burst option is carried in reception, and wherein the first burst option comprises the burst capacity of recommendation; The response message of the second burst option is carried in transmission, and wherein the second burst option comprises definite burst capacity, and definite burst capacity is smaller or equal to the burst capacity of recommending; According to the burst capacity of confirming, the data resource of transmission node.

In embodiments of the present invention, provide a kind of in Internet of things system the client device based on the data resource of lightweight application layer protocol through the slicing transmission node, client device comprises: acquiring unit is used to obtain the data resource capacity information of node; Transmitting element; Be used to send the request message that carries the first burst option; Wherein the first burst option comprises the burst capacity of recommendation, and receiving element receives the response message that carries the second burst option; Wherein the second burst option comprises definite burst capacity, and definite burst capacity is smaller or equal to the burst capacity of recommending; Transmission unit is used for according to the burst capacity of confirming and the data resource capacity information of node, the data resource of slicing transmission node.

In embodiments of the present invention; Provide a kind of in Internet of things system the server apparatus based on the data resource of lightweight application layer protocol through the slicing transmission node; Server apparatus comprises: receiving element, be used to receive the request message that carries the first burst option, and wherein the first burst option comprises the burst capacity of recommendation; Transmitting element; Be used to send the response message that carries the second burst option, wherein the second burst option comprises definite burst capacity, and definite burst capacity is smaller or equal to the burst capacity of recommending; Transmission unit is used for according to the burst capacity of confirming, the data resource of transmission node.

According to the embodiment of the invention; Can know the capacity information of the data resource of the node that needs transmission; And the burst capacity that uses when confirming the transmission data through the burst capabilities negotiation, can realize that thus error rate reduces in the transmission course, and can transmit data concomitantly.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:

Fig. 1 is the flow chart of method of the transmission data of an embodiment of the present invention;

Fig. 2 is the gateway of an embodiment of the present invention obtains the concrete implementation procedure of data resource from transducer a flow chart;

Fig. 3 is the structure chart of improved burst option in an embodiment of the present invention;

Fig. 4 is the gateway of a kind of alternate embodiment of the present invention obtains the concrete implementation procedure of data resource from transducer a flow chart;

Fig. 5 is the structure chart of improved burst option in a kind of alternate embodiment of the present invention;

Fig. 6 is the gateway of a kind of alternate embodiment of the present invention obtains the concrete implementation procedure of data resource from transducer a flow chart;

Fig. 7 is the structure chart of improved burst option in a kind of alternate embodiment of the present invention;

Fig. 8 is that the gateway of an embodiment of the present invention sends the flow chart of the concrete implementation procedure of data resource to transducer;

Fig. 9 is the block diagram of the client device of an embodiment of the present invention;

Figure 10 is the block diagram of the server apparatus of an embodiment of the present invention;

Figure 11 is the flow chart of method of the transmission data of an embodiment of the present invention;

Figure 12 is the structure chart of client device of the transmission data of an embodiment of the present invention;

Figure 13 is the structure chart of server apparatus of the transmission data of an embodiment of the present invention.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

CoAP is based on UDP (User Datagram Protocol is called for short " UDP ") and transmits, and is based on connectionless Message Processing pattern.Its interactive mode can be synchronous response, also can be asynchronous response.Type of message can be: the message (Confirmable), the message (Non-confirmable) that need not confirm, acknowledge message (Acknowledgement), the replacement message (Reset) that need affirmation.Message identifier (Message ID) be can pass through and related a pair of request and response come.

The method that CoAP supports has four: obtain resource (Get), more new resources (Put), establishing resource (Post) and delete resource (Delete).Resource shifts (RepresentationalState Transfer is called for short " REST ") URI through the statement sexual state and discerns.We claim that usually the side of having of resource is node or server, include but not limited to transducer, controller, end points (End-point) etc., and request resource side is a client, includes but not limited to gateway (Proxy), network equipment.

The CoAP agreement is supported different options (Option); In order to explain the semanteme of data in the CoAP message body; Such as Block (burst), Location (position), Token (token) option etc.; Different options is supported different functions, and can expand new function through defining new Option.

CoAP supports burst option (Block Option), is mainly used in bigger resource is carried out slicing transmission, to be adapted to the application scenarios of low bandwidth transmission.The Block option can be chosen according to the needed length of the capacity of burst number for 1 byte, 2 bytes or 3 bytes.

The accurate capacity of calculated data resource not in the traditional scheme can't be assessed the exact number of subpackage, therefore can't concurrently obtain.Do not know that in addition resource is static state or dynamic yet.

In the following description, claim that usually the side of having of resource is server, with transducer as an example, request resource side is a client, with gateway as an example.But, need not the oppose restriction of server or client of transducer or gateway.

Owing to do not know the accurate capacity of target resource, when gateway uses Block Option in < Get>order, can only obtain in order, i.e. Block 0 is obtained in choosing, when waiting Block 0 to return, obtains Block1 again, until last Block.Can not send < Get>request concomitantly.

The field structure of Block option generally comprises the NUM field, M field and SZX field, wherein

NUM representes the order sequence number of burst, can be 4～20 unsigned int numeral.0 first burst of expression.

M: represent with a bit whether current burst back also has other bursts, its value is that 1 expression back also has burst, is that 0 expression back does not have burst, is last burst.

SZX: be used to characterize the burst capacity, its computing formula is: burst capacity=2^ (SZX+4), i.e. (SZX+4) power of 2.Because SZX representes that by 3 bits its value can be 0～7, thus the span of burst capacity: 2^4～2^11, promptly 16～2048.

Operation instruction for the Block option is following:

In < Get>request, the NUM field of Block option provides the sequence number of the burst of current request, and when the burst sequence number was 0, SZX provided the capacity of each burst of gateway suggestion.In < Get>response or in < Put >/< Post>request, the sequence number of the burst of the current transmission of NUM field description of Block option, M field show whether the back also has follow-up burst.

In < Put >/< Post>response, the NUM field of Block option shows the burst sequence number of current response.

When gateway uses < Get>method to obtain first burst (Block); NUM is set to 0, and carries the burst capacity (being SZX) of suggestion, and sensor node can select to agree the burst capacity of advising; Or select one than the little burst of suggestion burst; And in response, return, simultaneously, in response, return the data of first burst.

The present invention considers that gateway knows the accurate capacity of target resource in advance; Then gateway can select whether to send with Block Option the request of resource acquisition, also can realize concurrent request, promptly in request Block0; Also can ask Block 1, and needn't wait for.On the order of request Block, also can handle flexibly.

In the simple design, Block Option has three selections, can be a byte, can be 2 bytes, also can be three bytes, and different according to the capacity of resource, the quantity capacity of burst (Block) is different, and needed length is also different.The agreement regulation, except last burst, the capacity of burst must be identical, but in each transmission, still all need carry M position (showing whether the back also has burst) and SZX (capacity of burst) at every turn.

In request and response, M position and SZX position all need to transmit at every turn, and in fact, except last burst, the value of M position and SZX all is identical at every turn, the transmission waste transfer resource of repetition.The purpose supposition both sides that repeat to send SZX do not preserve the SZX after the negotiation, and that carry in the response for the first time is the SZX after consulting, and gateway obtains and in request, sends once more from response, thereby gateway and transducer do not need preservation state.In request response rounds once, waste a byte altogether, if when the burst number is a lot, just it is enough for the byte of waste, and for M2M equipment, transfer resource is limited, and the waste of this transfer resource is very considerable.Suppose that the data that will transmit are 64M, the load of each Block (payload) capacity is that the block entry number that 1024byte then sends is: 65536.The number that the Block option that then sends divides according to byte is:

(1) byte: 16

(2) two bytes: 4080

(3) three bytes: 61440

If M and SZX can not send, then request adds that the data that response can be saved are 65536 bytes (byte), i.e. 64K data.In addition, if these two fields are not, then the NUM field can be used full all positions (bit), and the number of the packet that then need send changes to:

(1) byte: 256

(2) two bytes: 65280

Need not send the structure of 3 bytes this moment, therefore can also save data is 61440*2bytes, i.e. the 60K data.Then save data bit 124K altogether, save data transfer rate 0.189%.It is (16+4080*2+61440*3-256-65280*2)/(16+4080*2+61440*3)=61680/192496=32% that header field is saved percentage.

Save the formula of data volume:

T is total Block quantity, and S is burst capacity (Block Size), the percentage of the flow of saving (only comparing header field):

T＜16 o'clock: do not have and save; The both is a byte;

16＜T＜256 o'clock: 1-T*1/ (16*1+ (T-16) * 2), simple design needs 2 bytes, and preferred version only needs a byte;

256＜T＜4096 o'clock: 1-(256*1+ (T-256) * 2))/(16*1+ (T-16) * 2), simple design needs 2 bytes, and preferred version needs 2 bytes;

4096＜T＜65256 o'clock: 1-(256*1+ (4096-256) * 2+ (T-4096) * 3))/(256*1+ (T-256) * 2), simple design needs 3 bytes, and preferred version needs 2 bytes.

T＞65256 o'clock do not have and save, and preferred version embodiment of the present invention and simple design all need 3 bytes.

In the simple design, when using the Put/Post order, the burst capabilities negotiation lacks efficient.In the Put/Post request; For first burst; Need to send the data of first burst and the burst capacity of recommendation; If sensor node is selected different burst capacity, gateway need resend according to the burst capacity of transducer, and the fragment data that then sent last time has been wasted.And gateway in advance can't sensor resource capacity information when using the Put/Post request to send resource capacious based on the burst option; In transmission course, the transducer edge joint is received, the resource that the limit buffer memory is received; If transducer is found insufficient memory, and resource is not transmitted when accomplishing, and can only send it back one 413 error status code; The expression requested resource is too big, finishes transmission this time.The part resource of transmission is then useless before this, and transfer resource has been wasted.If gateway can be in first fragmental messages sensor the capacity information of the resource that will transmit; Transducer then can compare resource capacity information and memory capacity; If off-capacity; Return the conditional code of 413 " requested resource is too big " in advance, come the ending resource transmission, reach the purpose of saving transfer resource with this.

Breakpoint transmission on the Internet just will begin from the place that file has been downloaded to continue to download.Gateway will be added the scope (Range) that an information representes to ask data download in the transducer request msg, shows wherefrom to begin.

Such as, gateway transmits solicited message with browser and gives the Web transducer, requires since 2000070 bytes:

GET/down.zip?HTTP/1.0

User-Agent：NetFox

Range：bytes＝2000070-

Accept：text/html，image/gif，image/jpeg，*；q＝.2，*/*；q＝.2

Wherein, RANGE:bytes=2000070-, the meaning of this delegation is exactly to tell transducer down.zip that this file passes since 2000070 bytes, and the byte of front need not pass.

The shortcoming of this scheme is, do not have burst mechanism, do not support the negotiation of burst capacity, also do not support the negotiation of burst sum.The embodiment of the invention has been considered in the slicing transmission process, carries out the negotiation of burst capacity and/or burst sum.The invention provides a kind of method of data fragmentation transmission for this reason, can obtain the accurate capacity of target data resource, carry out the negotiation of burst capacity, obtain the burst sum, and carry out the data resource transmission according to the burst sum.

The following flow process that specifies an embodiment of the present invention with reference to Fig. 1.Fig. 1 is the flow chart of an embodiment of the present invention.

In the S110 process, obtain the capacity information of the data resource of node.If gateway obtains data from transducer, then the data resource capacity information of node is kept on the transducer.Gateway can pass through request message, obtains the capacity information of the data resource of node to transducer.If gateway sends data to transducer, then gateway local has been known the capacity information of the data resource of node.Obtaining the data resource capacity information of node, is to prepare for next step negotiation and definite burst sum that carries out the burst capacity.

Then, in the process of S120, gateway sends the request message that carries the first burst option to transducer, and the wherein said first burst option comprises the burst capacity of recommendation.After the request message that transducer sends,, confirm employed burst capacity in this data resource transmission course according to self-ability in receiving S120, and the burst capacity recommended smaller or equal to gateway of the burst capacity confirmed of transducer.

At S130, gateway receives the response message carry the second burst option, and the wherein said second burst option comprises definite burst capacity, and said definite burst capacity is smaller or equal to the burst capacity of said recommendation.Gateway is after receiving definite burst capacity, and according to the data resource capacity information of the node of grasping, the burst of the data resource of definite node that will transmit is total.

Then, at S140, according to the said definite burst capacity and the data resource capacity information of said node, the said data resource of slicing transmission.

According to the embodiment of the invention, can know the capacity information of the data resource that needs transmission, and the burst capacity that uses when confirming the transmission data through the burst capabilities negotiation, can realize that thus error rate reduces in the transmission course, and can transmit data concomitantly.

The concrete implementation procedure of embodiment as shown in Figure 1 is described below in conjunction with Fig. 2.Fig. 2 representes, and to be gateway obtain the illustrated examples of data from transducer, is merely explanation design of the present invention, and not as limitation of the present invention.

Data resource acquisition process shown in Figure 2 specifically describes as follows:

ES210: gateway sends the resource discovering request to transducer, promptly obtains the Resources list on the transducer through Get./wellknown/core.

ES220: transducer returns the Resources list to gateway, and resource indication information; Resource indication information mainly comprises addressing information (being URI), resource name, resource description information, content type of resource etc.The present invention expands resource indication information, and the resource indication information of expansion comprises: resource is the dynamic resource or the indication information of static resource.

ES230: the Resources list that gateway returns according to transducer, according to the indication information of resource, select target resource therefrom, and, obtain target resource according to identification marking (information that can unique recognition resource is such as resource name, URI etc.).

ES240: transducer is judged the target resource capacity, gives gateway if resource capacity, then directly returns resource content less than the capacity of a transport level messages; If resource capacity surpasses the capacity of a transport level messages, then return resource capacity information.Alternatively, transducer can use the burst option, and the burst capacity according to self confirming directly returns first burst.Subsequent client and transducer use the following burst of burst option transmission according to this burst capacity of confirming.

In a kind of alternate embodiment of the present invention, if the target data resource is the dynamic data resource, returns the dynamic data resource simultaneously and indicate, and use the Block option to obtain resource with the conditional code indication gateway of 413 " request resource is too big " to gateway.

If data resource is a dynamic resource, what then the resource capacity in the indication information was represented is the capacity information of current resource snapshot (Snapshot), and transducer needs this snapshot data of buffer memory; If static resource, then the resource capacity information in the indication information is accurate capacity information.It should be appreciated by those skilled in the art that then transducer can send the check code of resource snapshot if data resource is a dynamic resource, the data that gateway is fresher if desired, the new acquisition request conforms of can follow-uply redispatching.

ES250: gateway is according to the data resource capacity information, and judgement needs to use the burst option, and sends the request message that carries the burst option, carries out the burst capabilities negotiation with the transducer device, the burst capacity that indication is recommended.

ES260: transducer is confirmed the burst capacity according to self-ability, and it is returned to gateway.Alternatively, transducer returns the burst sum simultaneously.Certainly, because gateway has obtained the data resource capacity information, the burst sum also can be confirmed by gateway.Need to prove that the burst capacity that transducer is confirmed can only be less than or equal to the burst capacity that gateway is recommended.

ES270: gateway until burst is total, sends request, the fragment data of the data resource that acquisition request is corresponding with the burst sequence number to transducer from 1 successively.

ES280: transducer returns the fragment data that this burst sequence number reaches the data resource corresponding with this burst sequence number, up to complete end of transmission according to the burst capacity of confirming.

According to a kind of preferred embodiment of the present invention, can realize parallel processing among the ES270, i.e. gateway a plurality of fragmental messages of acquisition request simultaneously, and need not wait for that transducer returns the response message to previous burst request message.

The code of ES210 to ES240 for example is:

REQ:GET/.well-known/core---transmit a request to the URI of acquiescence, and promptly root obtains the Resources list;

RES:200OK--response identification obtains success, and has carried 2 groups of resource indication information;

REQ:GET/sensors/firmware-asks firmware resource

RES:413 " Request Entity Too Large " Size:88000.413 conditional code shows that requested resource is too big, and its accurate capacity is 88000 bytes.

If data resource is a dynamic resource, promptly data resource for example can adopt following two kinds of scheme implementations to handle in the process meeting dynamic change of transmission:

(1) when beginning to transmit data resource, this resource is set up snapshot (Snapshot), i.e. the buffer memory capacity information of this data resource this moment, and transmit this capacity information, no matter follow-up variation; Corresponding such scheme.

(2) if data resource is modified in transmission course, transducer can return error code in the response message of any one request message that obtains data resource, and the designation data resource is changed, and gateway need obtain again.

Alternatively, gateway and transducer increase authentication information in interacting message.The key information (Digest) that can comprise identify label (ID) in the authentication information, calculate based on identify label and password (Password).Identify label and password can be pre-configured give gateway and transducer both sides.Layoutprocedure:

For example, the algorithm of key can be Digest=MD5 (ID:Password), and the character string of promptly ID and Password being formed uses the MD5 algorithm to carry out Hash (Hash), and the value of Hash is Digest.Transmit leg sends ID and Digest, and the recipient draws Digest according to the Password that receives ID and store in advance according to same algorithm, and the Digest that sends with transmit leg compares, if consistent, then authentication is passed through.

When gateway obtains data resource from transducer, as shown in Figure 2, need know the data resource capacity information.According to an embodiment of the present invention, the data resource capacity information that gateway can adopt following scheme to obtain to be stored in transducer.

(1) expansion link form (Link-format) keyword

In Link-format, expand a keyword ,-sn, or-snapshot, be used for obtaining the data resource request responding, show whether resource data is snapshot data.If this parameter does not exist, or its value is 0, shows it is static resource, if the value of this parameter is 1, then shows it is that current data is a dynamic resource, and the data of obtaining are current snapshots.Static resource is meant metastable resource in a period of time, and promptly resource content can frequently not changed.Concrete implication can define in standard.In the present invention, the immovable situation of value that mainly refers to resource.

Etendue critical word :-asz also shows the information of the accurate capacity of resource.

Message instance:

Gateway sends the request of resource discovering to transducer:

REQ:GET/.well-known/core---transmit a request to the URI of acquiescence, and promptly root obtains the Resources list

Transducer sends the response of resource to gateway:

RES:200OK--response identification obtains success, and has carried 2 groups of resource indication information

This response message is to be encapsulated in the message body of CoAP message, and recipient's (being gateway) resolves according to the regulation in the Link-format standard.

(2) increase conditional code

When the data resource of receiving gateway obtained request, if resource is too big, a bag did not transmit, and transducer comes notification gateway with conditional code, is used to show, resource is too big, need ask with Block Option.

Such as, can specified states sign indicating number 413, be used to show that the current data resource capacity is excessive, the indication gateway is used the Block option in request.Can stipulate other conditional code as required,, be used for other purpose to be used to representing other implications.

Message instance:

Gateway sends the request of resource acquisition to transducer:

GET/sensordata

Transducer sends the response of carrier state sign indicating number to gateway:

ACK 413 (conditional code shows that the data resource capacity is too big)

(3) in the field (Header) of CoAP, increase an option (Option) that shows capacity (Size)

Gateway can use capacity option (Size Option) to come indication sensor in request, lets the capacity of transducer return data resource; Transducer indicates the capacity of data resource with Size Option in response.

Or, even gateway does not have the indication of Size Option, transducer also in response with under the bigger situation of SizeOption specified resource capacity, especially resource, transducer should be indicated.

If resource is less, transducer directly returns resource data in message body (Body), and then gateway should be as the criterion with the actual capacity of resource data, and the resource capacity that shows among the Size Option can be used to check.

If resource is bigger, transducer does not return resource data, only with the capacity of Size Option return data, indicates to gateway with conditional code simultaneously, lets gateway initiate new request, asks with Block Option.

The code of Size Option can be 16, and data type is an integer, and data length is 1～4 byte, and data unit is a byte.Size Option is mainly used in the response of < Get>method, in the request of < Put >/< Post>method, is used to represent the capacity of resource; If in the request of < Get>method, its value does not have practical meaning, recommends to be changed to 0.

Message instance:

Gateway sends the request of resource acquisition to transducer:

GET/sensordata

Transducer sends the response of carrier state sign indicating number to gateway:

ACK+413+Size 51200 (50K byte)

The concrete implementation procedure of embodiment as shown in Figure 1 is described below in conjunction with Fig. 3.What Fig. 3 represented is the illustrated examples of gateway to transducer transmission data, is merely explanation design of the present invention, and not as limitation of the present invention.

When gateway uses < Get>method to obtain first burst (Block) data; The NUM field is set to 0, and carries the burst capacity (being SZX) of recommendation, and transducer can select to agree the burst capacity recommended; Or select a burst capacity smaller or equal to the burst capacity of recommending; And in response, return, simultaneously, in response, return the fragment data of first burst.Therefore, be 0 o'clock in the NUM field, < Get>request has dual semanteme, and the one, obtain first fragment data, the 2nd, carry out the negotiation of burst capacity.Bring the ambiguity of agreement on handling like this, and can't carry information such as data capacity.

The embodiment of the invention is improved this; In an embodiment of the present invention, when gateway uses Block Option in the request of < Get>method, if the NUM field is set to 0; The expression both sides only carry out the negotiation of burst capacity, and the negotiation of burst sum.Be transducer in response, use the NUM field to return the burst sum, the burst capacity that uses SZX field Returning sensor to confirm.The M field can be removed, and saves a Bit, is used for the NUM field.Because the requesting party, for example gateway is known the burst sum, so just can know from the NUM field of burst whether this burst is last burst, therefore just need not re-use the M field.In this case, if the fragment data of first burst of acquisition request, then NUM is set to 1, and the like.

Need to prove; When if gateway sends first request; Do not know the capacity of data resource, so Block Option can use a byte, if the data resource of transducer is bigger; The burst number is bigger, and then transducer can use two bytes or three bytes to return the burst sum in response.

When Block Option was 2 bytes, it was designed to SZX fields account last three with second byte, expression burst capacity; First byte of NUM fields account usefulness adds preceding 5 of second byte, representes current burst sequence number; If in NUM is 0 request corresponding response message, then represent the burst sum.It will be appreciated by those skilled in the art that and can use message identifier (Message ID) to come association request and response, promptly ask and respond in all carry unique Transaction Identifier, just to understand this response message be to be used to return the burst sum to transducer like this.

Below illustrate burst capabilities negotiation process, message instance is:

Gateway sends the request of resource acquisition to transducer:

GET 00,000 101 (NUM is 0, and SZX is 101, promptly 5, and expression burst capacity is 29 powers, promptly 512)

The response that transducer sends to gateway:

ACK 10,000 100 (NUM is: 10000, and promptly total burst number is 32, SZX is 100, promptly 4, expression burst capacity is 28 powers, promptly 256)

This design has saved a bit (Bit), has promptly been saved the M position, and technical advantage is to have saved data traffic and little to the change of existing design.In this execution mode, burst capacity (SZX) field still will be sent at every turn.

In the prior art; Burst capacity (being the SZX field) all will send at every turn; No matter be in request message or in the response message, the burst capacity possibility of in first burst and last burst, using was different, other burst capacity was the same all.Repeat to transmit identical NUM field mutually and wasted transfer resource.

In embodiments of the present invention, when gateway used Block Option in the request of < Get>method, if NUM is set to 0, the expression both sides only carried out the negotiation of burst capacity, and the negotiation of burst sum.Be transducer in response, use the NUM field to return total burst number, the burst capacity that uses SZX field Returning sensor to confirm.And gateway and transducer both sides store determined burst capacity, the fragment data message transfer after being used for.Except last fragment data.Gateway is in the request of follow-up < Get>method; Only send the current burst sequence number of being asked; And do not send the burst capacity of confirming and remaining unchanged; And transducer also only sends current burst sequence number and the fragment data corresponding with this burst sequence number, the burst capacity of not redispatching in response message.In this case, NUM is 1 o'clock, the fragment data of first burst of expression request, and the like.

To adopt < GET>order to obtain data resource from transducer is example, and the foregoing description is described,

As shown in Figure 3, the design of new Block Option is following:

Wherein to be used for NUM be 0 situation to structure (1):

In < Get>request, NUM is 0, and SZX is second byte, expression burst capacity, and TotalNumber representes the burst sum, when request, does not use, and need not carry; In < Get>response, NUM is 0, and SZX representes the burst capacity that transducer is confirmed, Total Number representes the burst sum.

In the prior art, the interval of burst capacity is bigger, such as 2048,1024,512, and underaction.And in fact, 512 for a Block, smaller, preferably just can be put in the UDP bag, i.e. 1472 bytes.The present invention improves this, in one embodiment, for SZX, can take new formula, such as: (SZX+1) * 8, then its scope can for: 8～2048, but successively decrease and be spaced apart 8.

It is not 0 situation that structure among Fig. 3 (2) and structure (3) are used for < Get>request NUM, the situation when promptly obtaining fragment data:

When NUM less than 256 the time, represent the burst sequence number with a byte, i.e. structure (2); When NUM greater than 28 powers (promptly 256), during 16 powers less than 2 (promptly 65536), use two bytes to represent the burst sequence number, i.e. structure (3).

Because the NUM in the structure (2) must be greater than 0, the previous byte of the NUM field in the structure (3) therefore can distinguish with structure (1) also greater than 0, for < Get>response, the value of NUM field with ask in the same, also can distinguish.

Below illustrate, message instance is:

Gateway sends the request of resource acquisition to transducer:

GET 00,000,000 00000101 (NUM is 0, and SZX is 101, promptly 5, and expression burst capacity is 29 powers, promptly 512)

The response that transducer sends to gateway:

ACK 00,000,000 00,000,100 00,000,000 00010000 (NUM is 0, and Total Number is 10000, and promptly burst adds up to 32, and SZX is 100, promptly 4, and expression burst capacity is 28 powers, promptly 256).

Through Block Option is designed again; Can in each request or response, reduce at least and send 4 bits, under the more situation of burst, can greatly improve efficiency of transmission; Save transfer resource, also improved gateway and transducer both sides' treatment effeciency simultaneously.

Fig. 4 shows a kind of alternate embodiment of the present invention.In the embodiment shown in fig. 4, ES410 to ES420 is identical with ES210 to ES240 embodiment illustrated in fig. 2, no longer is repeated in this description.

In the embodiment shown in fig. 4, at ES450, gateway sends < GET>request to transducer, uses the burst option to carry out the burst capabilities negotiation, the burst capacity that the indication gateway is recommended.In ES460, transducer is selected and is confirmed suitable burst capacity, is used for resource is carried out burst, and gives gateway with all fragment data active push, and do not need gateway to send out < GET>request again.

Obtain in the data resource process at Fig. 4 embodiment, the design of burst option is as shown in Figure 5, wherein:

Structure (1) is used for gateway and sends < GET>request to transducer; The SZX field is represented the burst capacity that gateway is recommended; The burst capacity that the final burst capacity of selecting and confirming of transducer is recommended smaller or equal to gateway; NUM is the complete resource of 0 expression gateway requests, and NUM is not concrete NUM the fragment data of 0 expression gateway requests, and NUM is not that 0 o'clock transducer can only use the indicated burst capacity of SZX field.

Structure (2) and structure (3) are used for transducer returns burst response message from complete resource to gateway; If to replying of certain concrete fragment data request; Need not carry the burst option, the M field in structure (2) and (3) representes whether be last burst, if the M field is 0 last burst of expression; Be that 1 expression is not last burst, which burst what the NUM field represented that transducer returns is.

Below illustrate.Message instance is:

Gateway sends the request that data resource obtains to transducer:

CON GET 00,000,000 00000101 (NUM is 0, and SZX is 101, promptly 5, and expression burst capacity is 29 powers, promptly 512)

The response that transducer sends to gateway:

ACK 200 00000011 (NUM is 1, and M is 1, first burst that expression is sent, and be not last burst, the burst capacity is the capacity of SZX field appointment);

Transducer continues to send the CoAP response to gateway:

CON 200 00000101 (NUM is 2, and M is 1, second burst that expression is sent, and be not last burst, the burst capacity is the capacity of SZX field appointment);

Gateway returns the ACK to CON;

Transducer sends last burst to gateway:

CON 200 00000110 (NUM is 3, and M is 0, the 3rd burst that expression is sent, and be last burst, concrete burst capacity is calculated by actual sense data).

According to embodiment shown in Figure 4, when transducer obtains complete data resource, only need accomplish the negotiation of burst capacity at gateway, obtain request and need not send a large amount of fragment datas, saved data transfer throughput greatly.

Fig. 6 shows another kind of alternate embodiment of the present invention.In the embodiment shown in fig. 6, ES610 to ES640 is identical with ES210 to ES240 embodiment illustrated in fig. 2, therefore no longer is repeated in this description.

Fig. 6 and difference embodiment illustrated in fig. 2 are that at ES650, gateway sends < GET>request to transducer; The acquisition request resource is used the burst option, the burst capacity that the indication gateway is recommended; The value that this moment, the NUM field was filled is 0, last burst of expression acquisition request; At ES660, the sequence number of definite burst capacity and last burst and corresponding with it fragment data are returned in the request of transducer response gateway.Because the corresponding burst sum of last burst sequence number is so at ES670, gateway just can perhaps concurrent successively request of obtaining other fragment datas.At ES680, transducer returns the sequence number and the corresponding fragment data of this burst according to the burst capacity of confirming.ES670 and ES680 can repeatedly carry out alternately, until the fragment data end of transmission.

The burst option that adopts among Fig. 6 embodiment is as shown in Figure 7, for example adopts the burst option of two bytes, only comprises NUM field and SZX field.

Illustrate below in conjunction with Fig. 6 and Fig. 7, message instance is:

Gateway sends the request of resource acquisition to transducer:

CON GET 00,000,000 00000101 (NUM is 0, and expression requires to obtain last burst, and SZX is 101, promptly 5, and the burst capacity that expression is recommended is 29 powers, promptly 512).

The response that transducer sends to gateway:

ACK 00,000,000 01000101 (NUM 1000 is 8, and what expression was returned is the 8th burst, and SZX is 101 promptly 5, and the burst capacity that expression is confirmed is 29 powers, promptly 512);

According to primary return information, gateway has known that one has 8 bursts, and has obtained the data of the 8th burst, and gateway continues to send the CoAP request to transducer, can obtain successively also and can concurrently obtain remaining fragment data.Following message instance is the fragment data of first burst of acquisition request:

CON GET 00,000,000 00001101 (NUM is 1, and expression requires to obtain first burst, and SZX is 101, promptly 5, and expression burst capacity is 29 powers, promptly 512);

Transducer returns the ACK to CON, i.e. the data of first burst;

Gateway can be successively or all residue bursts of concurrent request, up to having obtained all data.

According to embodiment shown in Figure 6, can in the burst capabilities negotiation, obtain the fragment data of last burst; In follow-up fragment data acquisition process, employed burst capacity is all identical, therefore can combine the description of aforementioned preferred embodiments; Gateway can be when the request of fragment data be obtained in transmission, the SZX field of not redispatching, and only send the NUM field; Can save data traffic thus, improve efficiency of transmission.

Fig. 8 shows and uses the burst option to send data to transducer, the embodiment when for example using asset creation (Post) or upgrading (Put) request.Specifically describe below in conjunction with Fig. 8.

Detailed process description shown in Figure 8 is following:

ES810: gateway sends asset creation (Post) or upgrades (Put) request message to transducer; Utilize the Size option to send the capacity information of resource; The burst capacity and the burst sum that utilize the indication of burst option to recommend; Burst sum described herein is based on that the volumeter of burst capacity and the data resource to be sent of recommendation calculates, and does not carry concrete resource data in the request message body.

ES820: if transducer is ready to receive these data, then the return state sign indicating number for example is 100 (promptly indicating client to continue to send), returns definite burst capacity to gateway simultaneously, and said definite burst capacity can only be less than or equal to the burst capacity that gateway is recommended; If transducer is unwilling to receive these data, then returns error code indication client and do not continue to send data.Such as, the lack of memory capacity of transducer then returns the return code of 413 " Request Entity Too Large " to store the data of indicated resource capacity.

ES830: gateway is according to the burst capacity of confirming that transducer returns, and judges whether identically with the burst capacity of recommending, if identical, then jumps to ES360; If the burst capacity information of confirming inequality, as then to return, and, recomputate the burst sum according to the data resource capacity according to transducer.

ES840: gateway sends burst capacity of confirming and the burst that recomputates sum to transducer again.

ES850: transducer returns definite burst capacity.

ES860: gateway from according to the burst sequence number from 1 until burst sum, send the fragment data of the data resource corresponding successively to transducer, up to complete end of transmission with the burst sequence number.

ES870: transducer returns the message of confirming reception, wherein comprises the burst sequence number that receives.

According to a kind of preferred embodiment of the present invention, can carry out parallel processing among the ES860, promptly gateway can send a plurality of fragment datas to transducer simultaneously, and need not wait for that transducer returns the response message to previous fragmental messages.Alternatively, according to a kind of preferred embodiment of the present invention, gateway and transducer increase authentication information in interacting message.The configuration of authentication message and interactive mode can adopt the described same way as with reference to Fig. 2.

In order to improve efficiency of transmission; Save data traffic, the another kind of preferred embodiment according to the present invention is as the front is directed against the said ground of < GET>method; In the request of using < Put >/< Post>method; When NUM 0 is, no longer be to send first fragment data, but the capacity of the burst that sensor is recommended is total with burst.Transducer can return response and inform whether gateway continues to send data.Transducer uses the NUM field to return total burst number in response, the burst capacity that uses SZX field Returning sensor to confirm.And gateway and transducer both sides store determined burst capacity, the fragment data message transfer after being used for.Except last fragment data.Gateway is in the request of follow-up < Put >/< Post>method; Only send the current burst sequence number of being asked; And do not send the burst capacity of confirming and remaining unchanged; And transducer also only sends current burst sequence number and the fragment data corresponding with this burst sequence number, the burst capacity of not redispatching in response message.In this case, NUM is 1 o'clock, the fragment data of first burst of expression request, and the like.

In the case, the design of burst option and occupation mode all are similar to shown in Figure 3, below explain with reference to Fig. 3.In < Put >/< Post>request, the NUM field is 0, and the SZX field is second byte, and the burst capacity that expression is recommended, Total Number are represented burst sum number to be sent; In < Put >/< Post>response, the NUM field is 0, and the SZX field is represented the burst capacity that transducer is confirmed, Total Number is useless, need not carry; If SZX field that gateway receives and transmission is inconsistent, need send < Put >/< Post>request with new SZX once more, and carry the burst sum that recomputates, transducer is beamed back response again.After in < Put >/< Post>request and the response, no longer carry the SZX field.

Through the burst option is designed again; Can in each request or response, reduce at least and send 4 bits, under the more situation of burst, can greatly improve efficiency of transmission; Save transfer resource, also improved gateway and transducer both sides' treatment effeciency simultaneously.

In addition, prior art all need be carried the unified resource sign (URI of institute's request resource in the request of each slicing transmission; Unified Resource Identifier), URI will account for tens to tens bytes usually, and the transmission of repetition can be wasted transfer resource; The present invention designs and uses Token (token) to come a plurality of requests of related slicing transmission; Only in first fragmental messages, transmit URI, in follow-up slicing transmission request, only need carry Token and get final product; Because Token is 1～8 byte normally, therefore can save certain flow.

Fig. 9 is a kind of embodiment that passes through the client device of slicing transmission data resource of the present invention.Client device 900 shown in Figure 9 comprises: acquiring unit 910 is used to obtain the data resource capacity information; Transmitting element 920 is used to send the request message that carries the burst option, and wherein said burst option comprises the burst capacity of recommendation, and receiving element 930 receives the response message that carries the burst option, and wherein said burst option comprises definite burst capacity; With transmission unit 940, be used for according to said definite burst capacity and said data resource capacity information, the said data resource of slicing transmission.

According to a kind of preferred embodiment of the present invention, said client device may further include memory cell 950, is used to preserve said definite burst capacity.So that in the data resource transmission course, do not need all to send the SZX field at every turn.

According to another kind of preferred embodiment of the present invention, said client device may further include authentication ' unit 960, is used for sending and receiving authentication information.

Figure 10 is a kind of embodiment that passes through the server apparatus of slicing transmission data resource of the present invention.Server apparatus 1000 shown in Figure 10 comprises: receiving element 1010, be used to receive the request message that carries the burst option, and wherein said burst option comprises the burst capacity of recommendation; Transmitting element 1020 is used to send the response message that carries the burst option, and wherein said burst option comprises definite burst capacity; With transmission unit 1030, be used for according to said definite burst capacity, the said data resource of slicing transmission.

According to an embodiment of the present invention, transmitting element 1020 also is used to send the message of carrying the data resource capacity information, so that transmission unit 1030 is according to said definite burst capacity and said data resource capacity information, the said data resource of slicing transmission.

According to an embodiment of the present invention, when receiving one-time request, transmission unit 1030 is the slicing transmission data on one's own initiative, do not ask and do not need client device to be directed against each fragment data.

A kind of preferred embodiment according to the present invention, said server apparatus may further include memory cell 1040, is used to preserve said definite burst capacity.So that in the data resource transmission course, do not need all to send the SZX field at every turn.

According to another kind of preferred embodiment of the present invention, said server apparatus may further include authentication ' unit 1050, is used for sending and receiving authentication information.

According to the embodiment of the invention; Gateway can be known the capacity information of target resource, is used to make a strategic decision whether obtain resource with the mode of burst, has avoided the possibility of makeing mistakes like this; Also can realize asking concomitantly burst; Improve the efficient of request of data, and learn that the capacity of resource also is convenient to the memory allocated space, calculate the quantity of burst.

Through the burst option is designed again, can in each request or response, send 4 bits at least less, under the more situation of burst, can greatly improve efficiency of transmission, save transfer resource, also improved both sides' treatment effeciency simultaneously.

In the prior art, after receiving the request that comes from client, server can be beamed back response immediately; Also can beam back an Ack (Acknowledgement) response message earlier; Show to have received request message that present is after follow-up grade is handled; The response message of redispatching, the response of promptly postponing.In addition, client can be subscribed to the change of a resource, and server in case resource information changes, is just beamed back notification message to client after accepting the subscription of client to certain resource.

Prior art can not satisfy following demand:

1, client is indicated server in request, oneself needs the response of which kind of mode;

2, client requires server in certain official hour, to beam back response;

3, in the transport process of notification message, because network capacity is unstable, the notification message that possible server sends earlier, than the message of sending behind the server, the time that arrives client is wanted evening.Like this, the resource information of receiving after the client is actually outmoded information, and client needs the order that a kind of mechanism can be surveyed a plurality of notification messages.

Figure 11 is the flow chart of an embodiment of the present invention.In the embodiment shown in fig. 11; At S1110; User end to server sends a request message, and this request message carries the response mode option, and said response mode option can be delaying response (Deferred Response) option or token (Token) option; Be used for indicating server, whether client receives the response of postponement.For example, said corresponding manner option is represented: a plurality of responses that a plurality of responses of the disposable disposable response that makes an immediate response, postpones, postponement and cancellation are postponed.Then, at S1120, client can receive the response message that generates according to the response mode option.

In the prior art, after receiving the request that comes from client, server can be beamed back response immediately, also can beam back an Ack earlier, show to have received request message, and present, after follow-up grade is handled, the response message of redispatching, the response of promptly postponing.In addition, client can be subscribed to the change of a resource, and server in case resource information changes, is just beamed back notification message to client after accepting the subscription of client to certain resource.

In an embodiment of the present invention, for example can adopt delay (Deferred) option of a byte to indicate response mode, wherein, can use preceding two bits (Bit) to represent, represent with C:

C=00: represent disposable making an immediate response;

C=01: the disposable response that expression is postponed;

C=10: a plurality of responses that expression is postponed, promptly subscribe to;

C=11: a plurality of responses that the expression cancellation is postponed promptly cancel subscriptions.

Subscription for the client initiation about certain resource; Can cancel subscriptions by client; Also can cancel subscriptions by server, send back to the response message that needs of client are confirmed such as server, client fails to confirm in preset time; Then server can think that client loses connection, thereby cancels subscriptions.

Because a byte is 8 bits, unnecessary back 6 bits (supposing that its value is T) can be used to represent the retardation time of the disposable response postponed or the deadline of a plurality of responses of postponing, promptly above after this time, cancel subscriptions automatically.When C is 01, the retardation time of the disposable response that T representes to postpone; When C is 10, the deadline of a plurality of responses that T representes to postpone; When T was 00 or 11, T was nonsensical, was changed to 0.

For these 6 bits, can represent the numerical value between 0～63, be assumed to be T, can use 2 T power, show this time span, with the second unit, promptly can represent 1～2^63 second.Such as:

0:2^0=1 second;

1:2^1=2 second;

2:2^2=4 second;

3:2^3=8 second

4:2^4=16 second;

...

63:2^63 second.

In the prior art, the Max_Age field is used to maximum time of showing that certain response can be buffered, promptly shows the freshness of response.The present invention expands the implication of this field, can be in request representes the restriction in the time interval between a plurality of responses with the Max_Age field, must not be higher than this time interval such as a plurality of notification messages, or must not be lower than this time interval.

For the order of a plurality of responses, can use message identifier (Message ID) to distinguish.Such as, the regulation message identifier must come incrementally to generate according to the order of logical response, and the recipient judges the sequencing of response according to the size of message identifier.

According to another kind of embodiment of the present invention, can use Token (token) option to indicate response mode, if the Token value is 0, represent response immediately, if the Token value is not 0, then represent the response that can accept to postpone.

According to another kind of embodiment of the present invention, can be alternatively or increase timestamp (Timestamp) option in addition, and postpone option separately or indicate response mode in combination.Specifically, client can be carried the timestamp option in request, and said timestamp option comprises the value of a deadline, and requiring server to echo at the time of appointment internal return should; Server carries the timestamp option in response message, show the time that response message generates, and like this, client can be judged the order of response message based on the timestamp option.

In an embodiment of the present invention, the design of said timestamp option can be represented with 1～6 byte, if the time of expression is short, then uses a byte, if the time is long, then uses 3 bytes or 6 bytes.For example following two kinds of concrete method for expressing:

(1) with year, the moon, day, the time, branch, second represent first byte representation year, second byte representation moon, the 3rd byte representation day, the 4th byte representation hour; The 5th byte representation minute, for the time, for example can be the basis with 2000 at the 6th byte representation second; Its value shows which year after 2000, such as being, shows it is 2000 at 0 o'clock; Be 1 o'clock, show it is calendar year 2001, can represent 2063 at most.

(2) three bytes approximately are 136 years all with representing that maximum can be represented 2^24-1 second second.

Thus, client can be known the order of the response message that returns, the mistake of avoiding data transfer delay to cause.

Figure 12 is that wherein said client device 1200 comprises: sending module 1210 is used to send the request message that carries the response mode option according to the block diagram of the embodiment of a kind of client device that transmits data resource of the present invention; With receiver module 1220, be used to receive the response message that generates according to said response mode option.

All be applicable to client device shown in Figure 12 with reference to described process of the described embodiments of the invention of Figure 11 and characteristic.Specifically; For example; The response mode option that carries in the request message that sending module 1210 sends can be to postpone option, for example can be a plurality of responses that a plurality of responses of the disposable disposable response that makes an immediate response, postpones, postponement and cancellation are postponed.

According to a kind of embodiment, the deadline of the retardation time of the disposable response that the response mode option that carries in the request message that sending module 1210 sends can be represented to postpone or a plurality of responses of postponing.

According to a kind of embodiment, sending module 1210 sends the request message that carries the timestamp option, and this timestamp representes to receive the deadline of response; Receiver module 1220 receives the response message that carries the timestamp option, and this timestamp is represented the rise time of response message.Receiver module 1220 is confirmed the order of response message according to the represented time of timestamp in the response message that receives.

Figure 13 is that wherein said server apparatus 1300 comprises according to a kind of embodiment that transmits the server apparatus of data resource of the present invention: receiver module 1310 is used to receive the request message that carries the response mode option; With sending module 1320, send the response message that generates according to said response mode option.

All be applicable to server apparatus shown in Figure 13 with reference to described process of the described embodiments of the invention of Figure 11 and characteristic.Specifically; For example; The response mode option that carries in the request message that receiver module 1310 receives can be to postpone option, for example can be a plurality of responses that a plurality of responses of the disposable disposable response that makes an immediate response, postpones, postponement and cancellation are postponed.

The deadline of the retardation time of the disposable response that the response mode option that carries in the request message that according to an embodiment of the present, receiver module 1310 receives can be represented to postpone or a plurality of responses of postponing.

According to an embodiment of the present; The time interval between a plurality of responses that postponement option in the request message that receiver module 1310 receives is represented to postpone and a plurality of responses of postponement, and the postponement option in the response message that sending module 1320 sends representes to cancel a plurality of responses of postponement.

According to another kind of embodiment of the present invention; Can carry the timestamp option in the request message that receiver module 1310 receives; This timestamp option representes to receive the deadline of response; And also can carry the timestamp option in the response message that sending module 1320 sends, said timestamp option is represented the rise time of response message.

Those of ordinary skills can recognize; The unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein; Can realize with electronic hardware, computer software or the combination of the two; For the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in above-mentioned explanation.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each certain applications, but this realization should not thought and exceeds scope of the present invention.

The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.

Although illustrated and described some embodiments of the present invention, it will be understood by those skilled in the art that under the situation that does not break away from principle of the present invention and spirit can carry out various modifications to these embodiment, such modification should fall in the scope of the present invention.

Claims (29)

1. One kind in Internet of things system based on the method for lightweight application layer protocol through slicing transmission node data resource, it is characterized in that, comprising:

   Obtain the data resource capacity information of node, said resource capacity information is the data to be transmitted amount of capacity;

   Send the request message that carries the first burst option to said node, the wherein said first burst option comprises the burst capacity of recommendation;

   Receive the response message that said node carries the second burst option, the wherein said second burst option comprises definite burst capacity, and said definite burst capacity is less than or equal to the burst capacity of said recommendation;

   According to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
2. 2. the method for claim 1 is characterized in that,

   The said data resource capacity information that obtains node comprises:

   The request of the data resource of node is obtained in transmission;

   Receive the too big conditional code of data resource capacity of the data resource capacity information of said node and/or the node that indication is asked.
3. 3. method as claimed in claim 2 is characterized in that, this method also comprises:

   Receive the indication information of indication static resource or dynamic data resource, if dynamic resource, then represent the data resource capacity information of said node with current snapshot form.
4. 4. the method for claim 1 is characterized in that, the request message that the first burst option is carried in said transmission comprises:

   The request message of the first burst option is carried in transmission, and the wherein said first burst option also comprises the data resource capacity information of node.
5. 5. the method for claim 1 is characterized in that,

   The request message that the first burst option is carried in said transmission comprises:

   The request message of the first burst option is carried in transmission, and the wherein said first burst option comprises the indication information of only consulting the burst capacity;

   The response message that the second burst option is carried in said reception comprises:

   The response message of the second burst option is carried in reception, and the wherein said second burst option only comprises definite burst capacity.
6. 6. the method for claim 1 is characterized in that,

   Said transmission is carried in the request message of the first burst option, also carries the unified resource sign and the token that is used for related fragmental messages of institute's request resource;

   In the message of the data resource of the said node of said slicing transmission, only transmit the token of related fragmental messages.
7. 7. the method for claim 1 is characterized in that,

   Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

   According to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission successively or concurrently.
8. 8. the method for claim 1 is characterized in that,

   Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

   The resource transmission message that the 3rd burst option is carried in transmission, wherein said the 3rd burst option only comprises the burst sequence number, and said resource transmission message is carried the fragment data of the data resource of the said node corresponding with said burst sequence number.
9. 9. the method for claim 1 is characterized in that,

   The request message that the first burst option is carried in said transmission comprises:

   The request message of the first burst option is carried in transmission, and the wherein said first burst option comprises the indication information of the data of obtaining last burst;

   The response message that the second burst option is carried in said reception comprises:

   The response message of the second burst option is carried in reception, and the wherein said second burst option comprises the burst sum, and said response message carries the fragment data of the data resource of the said node corresponding with last burst;

   Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

   Obtain the fragment data of the data resource of the said node corresponding with other burst sequence numbers according to burst capacity and burst sum.
10. 10. the method for claim 1 is characterized in that, also comprises:

    The request message of authentication information is carried in transmission;

    The response message of the information passed through of indication authentication is carried in reception.
11. 11. the method for claim 1 is characterized in that,

    The request message of the first burst option is carried in transmission, and the wherein said first burst option comprises the burst sum, perhaps

    The response message of the second burst option is carried in reception, and the wherein said second burst option comprises the burst sum.
12. 12. one kind in Internet of things system based on the method for the data resource of lightweight application layer protocol through the slicing transmission node, it is characterized in that,

    The request message of the first burst option is carried in reception, and the wherein said first burst option comprises the burst capacity of recommendation,

    The response message of the second burst option is carried in transmission, and the wherein said second burst option comprises definite burst capacity, and said definite burst capacity is smaller or equal to the burst capacity of said recommendation;

    According to said definite burst capacity, transmit the data resource of said node.
13. 13. method as claimed in claim 12 is characterized in that, said method further comprises:

    The response message that the second burst option is carried in said transmission comprises, carries the data resource capacity information of node,

    Said according to said definite burst capacity, the data resource that transmits said node comprises:

    According to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
14. 14. method as claimed in claim 12 is characterized in that,

    The request message that the first burst option is carried in said reception comprises:

    The request message of the first burst option is carried in reception, comprising the data resource capacity information of node,

    Said according to said definite burst capacity, the data resource that transmits said node comprises:

    According to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
15. 15. method as claimed in claim 13; It is characterized in that; Data resource capacity information according to the node that receives is judged, if the data resource capacity information of node greater than the memory capacity of self, sends the too big conditional code of data resource capacity of instructs node.
16. 16. method as claimed in claim 12 is characterized in that,

    The request message that the first burst option is carried in said reception comprises:

    The request message of the first burst option is carried in reception, comprising the indication information of the data of obtaining last burst;

    The response message that the second burst option is carried in said transmission comprises:

    The response message of the second burst option is carried in transmission, and the wherein said second burst option comprises the burst sum, and said response message carries the fragment data of the data resource of the said node corresponding with last burst;

    Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

    According to burst capacity and the total fragment data that sends the data resource of the said node corresponding of burst with other burst sequence numbers.
17. 17. method as claimed in claim 13 is characterized in that,

    Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

    The resource transmission message that the 3rd burst option is carried in transmission, wherein said the 3rd burst option only comprises the burst sequence number, and said resource transmission message is carried the fragment data of the data resource of the said node corresponding with said burst sequence number.
18. 18. method as claimed in claim 12 is characterized in that,

    The request message that the first burst option is carried in said reception comprises:

    The request message of the first burst option is carried in reception, and the wherein said first burst option comprises the indication information of only consulting the burst capacity;

    The response message that the second burst option is carried in said transmission comprises:

    The response message of the second burst option is carried in transmission, and the wherein said second burst option only comprises definite burst capacity.
19. 19. like claim 12 or 13 described methods, it is characterized in that,

    Said according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission comprises:

    According to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission successively or concurrently.
20. 20. one kind in Internet of things system based on the client device of the data resource of lightweight application layer protocol through the slicing transmission node, it is characterized in that said client device comprises:

    Acquiring unit is used to obtain the data resource capacity information of node;

    Transmitting element is used to send the request message that carries the first burst option, and the wherein said first burst option comprises the burst capacity of recommendation,

    Receiving element receives the response message carry the second burst option, and the wherein said second burst option comprises definite burst capacity, and said definite burst capacity is smaller or equal to the burst capacity of said recommendation;

    Transmission unit is used for according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
21. 21. client device as claimed in claim 20 is characterized in that,

    Said transmission unit is the data resource of the said node of slicing transmission successively or concomitantly.
22. 22. client device as claimed in claim 20 is characterized in that, said equipment also comprises:

    Memory cell is used to preserve said definite burst capacity.
23. 23. client device as claimed in claim 20 is characterized in that, said equipment also comprises:

    Authentication ' unit is used for sending and receiving authentication information.
24. 24. one kind in Internet of things system based on the server apparatus of the data resource of lightweight application layer protocol through the slicing transmission node, it is characterized in that said server apparatus comprises:

    Receiving element is used to receive the request message that carries the first burst option, and the wherein said first burst option comprises the burst capacity of recommendation,

    Transmitting element is used to send the response message that carries the second burst option, and the wherein said second burst option comprises definite burst capacity, and said definite burst capacity is smaller or equal to the burst capacity of said recommendation;

    Transmission unit is used for transmitting the data resource of said node according to said definite burst capacity.
25. 25. server apparatus as claimed in claim 24 is characterized in that,

    Said transmitting element is used to send the message of the data resource capacity information that carries said node,

    Said transmission unit is used for according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
26. 26. server apparatus as claimed in claim 24 is characterized in that,

    Said receiving element is used to receive the request message that carries the second burst option, comprising the data resource capacity information of node,

    Said transmission unit is used for according to the said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission.
27. 27. server apparatus as claimed in claim 24 is characterized in that,

    Said transmission unit is used for according to said definite burst capacity and the data resource capacity information of said node, the data resource of the said node of slicing transmission on one's own initiative.
28. 28. server apparatus as claimed in claim 24 is characterized in that, said server apparatus also comprises:

    Memory cell is used to preserve said definite burst capacity.
29. 29. server apparatus as claimed in claim 24 is characterized in that, said server apparatus also comprises:

    Authentication ' unit is used for receiving and sending authentication information.

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