CN107124693A - The MTC device data transmission method and system of a kind of cluster compression - Google Patents
The MTC device data transmission method and system of a kind of cluster compression Download PDFInfo
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- CN107124693A CN107124693A CN201710424421.0A CN201710424421A CN107124693A CN 107124693 A CN107124693 A CN 107124693A CN 201710424421 A CN201710424421 A CN 201710424421A CN 107124693 A CN107124693 A CN 107124693A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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Abstract
The present invention provides the MTC device data transmission method and system of a kind of cluster compression, it is first according to MTC device data type and carries out cluster division, cluster head equipment is chosen in cell according to given standard, and completes by cluster thick division strategy and cluster adjustable strategies the clustering to all devices.Then, the data message of equipment in cluster is collected at cluster head equipment, and redundancy is reduced by data compression, the efficiency of magnanimity MTC device efficient data transfer is improved, efficiently solves the congestion problems faced during a large amount of MTC device access base stations.During cluster head equipment sends data to base station, using RB resources are pre-allocated, reservation exempts from dispatching method and reduces signaling consumption, improves access number capacity.
Description
Technical field
The present invention relates to mobile communication technology field, the MTC device data transfer compressed more particularly, to a kind of cluster
Method and system.
Background technology
In recent years, the universal development that technology of Internet of things is obtained in worldwide, the equipment of Internet of Things is due to build
The characteristic such as small, area coverage is big so that its application spreads all over around life.MTC technologies are technology of Internet of things in radio communication
One of technical field very crucial technology, therefore extensive research has been obtained the problem of in terms of MTC Access Controls.
Common MTC Admission Controls are included when magnanimity MTC device sends access request to base station simultaneously, and base station holds
Easily there is crowded obstructing problem, thus the treatment effeciency of base station can be caused to decline, the data in data transmission procedure continuously emerge
Lose and error problem, so MTC congestion optimization problem can not be ignored.
Compared to being a new transport-type with for the data transfer based on scheduling in LTE, exempting from scheduled transmission, for
It is of great advantage for the business devices such as mMTC and URLLC.Exempt from scheduled transmission for scattered data traffic or small data packets
Transmission it is particularly advantageous.Cost reduction is always advantageous for using scheduled transmission is exempted from (at least for SR, grant or RACH).Specifically
Use and dispose the characteristic for being likely to be dependent on mMTC equipment and/or requirement.Exempt from scheduling scheme reception data due to using
Information, so receiving terminal has to be received using SIC receivers, but the complexity of SIC receivers and base station resource
Shared number of users is directly related, when the shared number of users of base station resource is excessive, it is necessary to which the complexity of the SIC receivers of design must
Must be very big, in some instances it may even be possible to technical capability at this stage can be exceeded, so therefore the apparatus of load ability of base station can be limited.
The content of the invention
The present invention provides a kind of a kind of cluster compression for overcoming above mentioned problem or solving the above problems at least in part
MTC device data transmission method and system, solve the congestion problems that a large amount of MTC device access base stations face at present.
According to an aspect of the invention, there is provided a kind of MTC device data transmission method of cluster compression, including：
S1, carries out cluster division to all MTC devices, and be each cluster according to the correlation of service data information
Choose corresponding cluster head equipment；
Cluster head equipment in S2, each cluster carries out collecting pressure to the business datum of all MTC devices in the cluster
Contracting, and the business datum collected after compression is uploaded to base station.
Beneficial effects of the present invention are：Cluster division is carried out according to MTC device data type, according to given standard small
Cluster head equipment is chosen in area, and the clustering to all devices is completed by cluster thick division strategy and cluster adjustable strategies.
Collect the data message of equipment in cluster at cluster head, and redundancy is reduced by data compression, improve magnanimity MTC device efficient
The efficiency of data transfer, efficiently solves the congestion problems faced during a large amount of MTC device access base stations.
On the basis of above-mentioned technical proposal, the present invention can also make following improvement.
Further, the step S1 is specifically included：
S11, chooses multiple cluster head equipment according to preparatory condition from all MTC devices, and stores each cluster head and set
Standby service data information；
S2, the service data information and each cluster head for calculating each MTC device in addition to multiple cluster head equipment is set
Correlation between standby service data information, is clustered according to correlation to cluster head equipment and MTC device, the cluster after cluster
Head apparatus and MTC device composition cluster.
Further, the step S11 also includes：
The correlation between the service data information for the multiple cluster head equipment chosen is calculated, when correlation exceedes predetermined threshold value
Cluster head equipment when having multiple, therefrom retain a cluster head equipment, other cluster head equipment are used as common MTC device.
Further, the cluster head equipment in the step S2 in each cluster is to all MTC devices in the cluster
Business datum progress collects compression and specifically included：
Other all MTC device broadcast request signalings of the cluster head equipment into the cluster in S21a, each cluster；
S22a, receives the data frame that each MTC device in cluster is sent, wherein, the data frame is MTC device root
Sent according to the demand signalling received to cluster head equipment；
S23a, cluster head equipment removes the identical information in the data frame of each MTC device, and each MTC is set
Distinctive information combination in standby data frame, then the distinctive information after the identical information and combination is combined, formed most
Collect the data frame after compression eventually.
Further, the business datum collected after compression is uploaded to base station tool by each cluster head equipment in the step S2
Body includes：
Cluster head equipment in S21b, each cluster is set up with base station to be connected, and sends up signaling to base station, wherein,
The up signaling includes required RB resources；
S22b, each cluster head equipment receive base station send notification, wherein, the notification be base station according to
RB resources needed for owned upstream data resource and each cluster head equipment, are each cluster head equipment distribution correspondence
RB resource blocks after, to each cluster head equipment send, the notification include to each cluster head equipment distribution
RB resource blocks；The business datum collected after compression is uploaded to base by S23b, each cluster head equipment by the RB resource blocks of distribution
Stand.
Further, the step S21b is specifically included：
Cluster head equipment in each cluster sends lead code to base station；
The response message that base station is returned is received, wherein, the response message is when base station is to all unduplicated lead codes
What corresponding cluster head equipment was sent；
When cluster head equipment receives the response message of base station transmission, up signaling, the up signaling are sent to base station
Include required RB resources.
Further, methods described also includes：
For with the cluster head equipment for repeating lead code, setting back off time, when after back off time, base station notifies every
One cluster head equipment sends the lead code after updating to base station again.
Further, base station is set according to owned upstream data resource and each cluster head in the step S22b
Standby required RB resources, are that the corresponding RB resource blocks of each cluster head equipment distribution are specifically included：
When the upstream data resource of base station gives each cluster head equipment enough, each cluster head equipment is given without overlapping
Distribute corresponding RB resource blocks；
When the upstream data inadequate resource of base station to give during each cluster head equipment, using base station resource multiple users share
Mode to each cluster head equipment distribute RB resource blocks.
Further, it is described to distribute RB resource blocks to each cluster head equipment by the way of base station resource multiple users share
Specifically include：
To base station resource block according to FB1~FBM-mDivide, when having divided FBiAfterwards, base station resource is not enough allocated to FBi+1, then
Start anew to divide FB to base station resourcei+1~FBM-m, the division position until completing all demands realizes that base station resource is used
Share at family；
Wherein, M-m refers to the number of the corresponding cluster head equipment of all unduplicated lead codes, and i is in all cluster head equipment
One cluster head equipment identity.According to another aspect of the present invention, a kind of MTC device data transfer of cluster compression is additionally provided
System, including multiple MTC devices and base station, wherein, multiple cluster head equipment are chosen from all MTC devices；
The base station, carries out cluster division to all MTC devices, and be each for the correlation according to business datum
Individual cluster chooses corresponding cluster head equipment；
Each described cluster head equipment, carries out collecting compression for the business datum to all MTC devices in the cluster,
And the business datum collected after compression is uploaded to base station.
Brief description of the drawings
The MTC device data transmission method flow chart that Fig. 1 compresses for the cluster of one embodiment of the invention；
Fig. 2 is the clustering flow chart of another embodiment of the present invention；
Fig. 3 is cluster adjustment flow chart during the clustering of one embodiment of the invention；
Fig. 4 is the data interaction schematic diagram of each MTC device and cluster head equipment in another embodiment of the present invention；
Fig. 5 compresses schematic diagram for cluster head equipment in one embodiment of the invention to the business datum of each MTC device；
Fig. 6 is that base station is each cluster head equipment distribution resource flow chart in another embodiment of the present invention；
The MTC device data transmission system connection block diagram that Fig. 7 compresses for the cluster of further embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Referring to Fig. 1, Fig. 1 provides the MTC device data transmission method that the cluster of one embodiment of the invention compresses, and faces
A large amount of MTC devices are while the congestion problems of access base station, the scheme based on clustering is the solution of current congestion control
One of, particular content is as follows：One group of MTC device will be logical respectively as single entity, and each other in data communication
Cross cluster network and set up connection.It is not institute based on the MTC device after clustering different from the communication mode between phone user
There is equipment all directly and transmission data are set up in base station, but directly set up and interact with base station by selecting the representative of cluster head equipment, cluster
Miscellaneous equipment in group then sets up interaction between cluster head equipment.Using the scheme based on cluster can improve energy efficiency and
The life cycle of MTC device in network.Cluster head equipment is as one of important member in cluster, and special be that is limited by some
The cluster that fixed condition is screened is represented, and major function is the data for collecting cluster, and is compressed processing, is then entered with base station
Row interaction.
The method that the present embodiment is provided includes：S1, is carried out according to the correlation of service data information to all MTC devices
Cluster is divided, and chooses corresponding cluster head equipment for each cluster；Cluster head equipment in S2, each cluster is in the cluster
The business datums of all MTC devices carry out collecting compression, and the business datum collected after compressing is uploaded to base station.
In the present embodiment, cluster division is carried out to needing the MTC device of access base station according to business correlation, and is every
One cluster chooses corresponding cluster head equipment.Wherein, the MTC device of same line of business is divided into same cluster as far as possible, so
Can allow the cluster head equipment in each cluster receive between the business datum of each MTC device exist it is as much as possible superfluous
Remaining information, so as to before carrying out data transmission to base station, data compression being carried out at cluster head equipment, realizes in cluster and sets
The target of standby data message high compression efficiency, enters in cluster head equipment to the business datum of all MTC devices in the cluster
Row compression, can also improve the access number tolerance limit of whole base station.
Clustering has been carried out to all MTC devices and have chosen for each cluster after corresponding cluster head equipment,
Cluster head equipment in each cluster carries out collecting compression to the business datum of all MTC devices in the cluster, and will collect
Business datum after compression is uploaded to base station.
The present embodiment carries out cluster division according to MTC device data type, and cluster is chosen in cell according to given standard
Head apparatus, and complete the clustering to all devices by cluster thick division strategy and cluster adjustable strategies.Then, in cluster head
Collect the data message of equipment in cluster at place, and reduces redundancy by data compression, improves magnanimity MTC device efficient data biography
Defeated efficiency, efficiently solves the congestion problems faced during a large amount of MTC device access base stations.
In one embodiment of the invention, the step S1 is specifically included：S11, according to pre- from all MTC devices
If condition chooses multiple cluster head equipment, and stores the service data information of each cluster head equipment；S2, is calculated except multiple cluster heads are set
The correlation between the service data information of each MTC device and the service data information of each cluster head equipment outside standby
Property, cluster head equipment and MTC device are clustered according to correlation, cluster head equipment and MTC device composition cluster after cluster.
To access base station in need MTC device carry out clustering during, first from all MTC devices
In choose multiple cluster head equipment according to preparatory condition, the service data information of each cluster head equipment of selection is deposited in base station
Storage.Then, all MTC devices beyond multiple cluster head equipment are removed business data frame is sent to base station, base station calculates every
Correlation between the business data frame of one MTC device and the business data frame of each cluster head equipment, and according to correlation
Cluster head equipment and MTC device are clustered, cluster head equipment and MTC device composition cluster after cluster.
The process of the clustering of MTC device can be largely classified into two stages：First stage is cluster thick division process,
Threshold value i.e. based on initial setting up carries out correlation and relatively divides cluster, but occur the MTC device in cluster very little or
Too many situation.Therefore, second stage is cluster adjustment process, that is, passes through the number of devices of base station real-time statistics cluster, Ran Houdong
State adjusts threshold value Y to realize control cluster number of devices in a range of purpose.
Wherein, referring to Fig. 2, cluster thick division process：After selected cluster head equipment, the business number of base station stored cluster head equipment
It is believed that breath A.Then each MTC device sends data frame and arrives base station, data frame specifically include the device identifier of frame head storage with
The service data information B of data left frame storage.Need to add each MTC device of control strategy (ARQ) guarantee in transmitting procedure
Data are successfully transmitted during cluster can be divided in first time, the division of cluster is completed.
First, the data frame of each MTC device first removes frame head after reaching base station, then remaining business datum is believed
The service data information A of the cluster head equipment of breath B and base station stored carries out correlation calculations and obtains coefficient Ri, wherein, 0 ＜ i
≤ n, n are the number for all MTC devices for removing cluster head equipment.Afterwards, by the coefficient R of each MTC deviceiWith setting
Threshold value Y is compared, if meeting Ri>Y, then be divided into the cluster that this cluster head equipment is representative by the MTC device.On the contrary, such as
Fruit Ri<Y, the then service data information A for choosing other cluster head equipment again is compared, and recalculates the phase with this MTC device
Close coefficients RiCompared again with threshold value Y afterwards.Then, having divided the MTC device of cluster needs to feed back the GID of correspondence cluster head equipment
(Group Identification, colony's identity) information notifies the cluster where base station oneself to base station.
Wherein, referring to Fig. 3, cluster adjustment process is：MTC device from different cluster heads by setting during cluster thick division
It is standby to calculate correlation to divide cluster, but the very few or excessive situation of the MTC device number in cluster occurs, in order to solve this
Problem, realizes the target of efficient cluster access, shown below is the cluster adjustment process completed after cluster thick division process, specifically
Flow is as follows：
First, base station is in the MTC device number during clustering in real-time statistics cluster, after thick division terminates,
Base station can obtain the MTC device number X of each cluster head equipment correspondence cluster.Afterwards, the MTC device number X to each cluster is entered
Row analysis, if the MTC device number X of cluster is less than minimum lower limit X 1, it is necessary to reduce threshold value Y during cluster adjustment, so that
Increase the number of cluster.If the MTC device number X of cluster be more than optimal boundary X2, it is necessary to removed in cluster cluster head equipment it
Outside, equipment unnecessary in each cluster is selected at random according to same optimal boundary X2 clusters, and therefrom selects new cluster head
Equipment.The selection standard of cluster head equipment as hereinbefore, sends notification to base station, the cluster head for telling base station new is set after selecting herein
Standby GID information, and in its service data information of base station stored A.Finally, will be after cluster adjustment process, all MTC devices
The GID of new cluster head equipment is resend to base station, its final clustering situation of base station is notified.
In another embodiment of the present invention, the step S11 also includes：Calculate the industry for the multiple cluster head equipment chosen
Correlation between business data message, when the cluster head equipment that correlation exceedes predetermined threshold value has multiple, therefrom retains a cluster
Head apparatus, other cluster head equipment are used as common MTC device.
It is above-mentioned in all MTC devices choose cluster head equipment during, when the load equipment ability of MTC device reaches
100, battery life reach more than 10 years, channel condition meet the MTC device of threshold value as cluster head equipment, in same covering
In cell, for different MTC services, choose MTC device according to the principle respectively and be used as cluster head equipment.
The multiple cluster head equipment chosen according to such scheme are possible to the traffic data type of multiple cluster head equipment
It is identical, when dividing cluster, this multiple cluster head equipment should be in same cluster.Therefore, the present embodiment is calculated
Correlation between the business datum for the multiple cluster head equipment chosen, when the cluster head equipment that correlation exceedes predetermined threshold value has multiple
When, therefrom retain a cluster head equipment, ignore other cluster head equipment.That is, when multiple clusters according to foregoing scheme selection
When the correlation for having the business datum of multiple cluster head equipment in head apparatus is more than predetermined threshold value, show the industry of these cluster head equipment
Data of being engaged in are same type of business datums, therefore, and a cluster head equipment, other cluster heads are retained in these cluster head equipment
Equipment is as common MTC device, and the cluster for so enabling to subsequent divided to come out is more accurate.
In one embodiment of the invention, the cluster head equipment in the step S2 in each cluster is in the cluster
The business datum progress of all MTC devices collects compression and specifically included：Cluster head equipment in S21a, each cluster is to the cluster
Interior other all MTC device broadcast request signalings；S22a, receives the data frame that each MTC device in cluster is sent, its
In, the data frame is what MTC device was sent according to the demand signalling received to cluster head equipment；S23a, cluster head equipment will be every
Identical information in the data frame of one MTC device is removed, and by the distinctive information group in the data frame of each MTC device
Close, then the distinctive information after the identical information and combination is combined, form the final data frame collected after compression.
After clustering is finished, it is contemplated that closer to the distance between equipment in cluster, in order to save Cellular Networks frequency as far as possible
LAN, such as WiFi or Zigbee can be used inside band resource, cluster, the communication interaction between cluster head and base station makes
Use cellular network.Set up and communicated to connect by LAN i.e. between the cluster head equipment of each MTC device and the cluster, each
The cluster head equipment of cluster is set up by cellular network and base station and communicated to connect.Cluster head equipment in each cluster collects compression should
The business datum of all MTC devices in cluster.
Detailed process is, referring to Fig. 4, and cluster head equipment broadcasts demand signalling GID by LANiTo the institute in correspondence cluster
There is MTC device, wherein, GIDiRepresent the identity information of i-th of cluster.Afterwards, the MTC device in cluster receives demand signalling,
If having data latency transmission just, data frame is directly transmitted to cluster head equipment.If temporarily sent out without data latency transmission
Empty is sent to signal cluster head equipment.Then, cluster head equipment is all returned for the data message and empty information having correctly received
Answer ACK (Acknowledgement, confirm character) information, situations such as being lost for factor data cause cluster head equipment could not enough and
When receive the MTC device of echo message, if not receiving the echo message of cluster head equipment in scheduled time t, need weight
New data frame or the empty of sending is to cluster head equipment, untill receiving the response of cluster head equipment.Finally, set in advance
In counter time, MTC device is by repeatedly retransmitting data, if being still not received by the echo message of cluster head equipment,
Data are no longer retransmitted, processing is not continued to.
The MTC device data summarization in cluster is completed to after cluster head equipment, cluster head equipment starts the business number to collecting
According to progress data processing.In view of above-mentioned clustering standard owned in same type MTC service data, such as a certain cluster
The business datum that MTC device is sent all is the current water consumption information data frame that intellectual water meter is sent, therefore between data message
There can be certain redundancy.The data compression scheme that the present embodiment is proposed is mainly the MTC device reduced in same cluster
Business data frame between redundancy, idiographic flow is as follows：
Consider that clustering is divided according to the standard of same type business datum, the data frame that cluster head equipment is received
Form it is basically identical.Referring to Fig. 5, UE1 represents the data frame of cluster head equipment in figure, is represented with A, related as data
The benchmark that property compares.The previous section of UE2~UEn data frame is represented with A, representative be in each MTC device data with
Cluster head device data identical information, also exactly needs the redundancy eliminated.That a2~an behind data frame is represented is MTC
The label information distinguished in device data frame with A, such as marked that the data in some position are different, specific data are assorted
.The business data frame that is obtained after final compression as shown in Fig. 2 the data frame A of the benchmark of cluster head equipment UE 1 is placed on before, after
That and then face stores is 2~UEn of equipment UE label information a2~ans different from cluster head device data.
The thinking of this compression scheme derives from compression of images, is not difficult to find out from above-mentioned data compression strategy, if cluster
Relevance threshold Y during division is bigger, and the redundancy existed between cluster facility information is bigger, and compression degree during data compression is got over
Height, efficiency of transmission is also higher.For the relatively small cluster of correlation, compared to for not compressing directly transmission, meeting is remained on
It is advantageous.
In one embodiment of the invention, each cluster head equipment will collect the business number after compression in the step S2
Specifically included according to base station is uploaded to：Cluster head equipment in S21b, each cluster is set up with base station to be connected, and is sent to base station
Row signaling, wherein, the up signaling includes required RB resources；S22b, each cluster head equipment receives what base station was sent
Notification, wherein, the notification is base station according to owned upstream data resource and each cluster head equipment
Required RB resources, are that each cluster head equipment is distributed after corresponding RB resource blocks, are sent to each cluster head equipment, described
Notification includes the RB resource blocks distributed to each cluster head equipment；S23b, the RB that each cluster head equipment passes through distribution
Resource block by collect industry after business datum be uploaded to base station.
Cluster head equipment in each above-mentioned cluster is converged to the business data frame of all MTC devices in cluster
After total compression, the cluster head equipment in each cluster is set up with base station by cellular network to be communicated to connect.Each cluster head equipment
Up signaling is sent to base station, wherein, up signaling includes the RB resources of cluster head equipment needs.When base station receives each
After the up signaling that cluster head equipment is sent, according to the RB resources needed in up signaling, provided according to owned upstream data
Source, is that each cluster head equipment distributes corresponding RB resource blocks, and informs each cluster head equipment, so that each cluster head equipment
The business data frame collected after compression is uploaded to by base station by the RB resource blocks of distribution.
In another embodiment of the present invention, the step S21b is specifically included：Cluster head equipment in each cluster
Lead code is sent to base station；The response message that base station is returned is received, wherein, the response message is when base station is not repeated to all
The corresponding cluster head equipment of lead code send；When cluster head equipment receives the response message of base station transmission, sent to base station
Up signaling, the up signaling includes required RB resources.
During distributing RB resources to each cluster head equipment in base station, first, cluster head equipment randomly chooses leading sequence
Row are sent to base station, and the targeting sequencing of cluster head equipment selection represents the signal resource for needing to transmit.
Referring to Fig. 6, base station is received after the targeting sequencing of each cluster head equipment transmission, to of the targeting sequencing received
Number is counted, and obtains the cluster head number of devices M of request access, and judges the leading sequence that whether there is repetition in these targeting sequencings
Row, such as, it is repetition to have m targeting sequencing in the M targeting sequencing that base station is received altogether, then before base station is first not to repetition
The business datum for leading the cluster head equipment of sequence is handled, at the M-m cluster head equipment only not repeated to targeting sequencing
Reason.
Base station starts to feed back response response messages to the M-m cluster head equipment that above-mentioned targeting sequencing is not repeated, its
In, response message content is indexed including targeting sequencing, and calculates time domain correlation, realizes that upstream time and network side keep same
Step, and no longer feed back response information for the m cluster head equipment clashed using same preamble sequence.
The cluster head equipment for receiving response message sends up signaling to base station, by each required up RB resource notifications
Base station, realizes that corresponding RB resource blocks are distributed in base station to each cluster head equipment.In the present embodiment, cluster head equipment office will be to base
The process for the process and the up signaling of transmission that send targeting sequencing of standing is separated, it is to avoid is once sent overabundance of data and is caused not
Just, whole data transmission efficiency is improved.Wherein, when base station receives cluster head equipment UE1~UEM-mRespective required up RB resources
After block, the data transmission resources possessed for base station are removed beyond protection interval, according to the RB resource blocks of each cluster head equipment
Demand FB1~FBM-mThe up RB resources possessed base station are allocated.When the up RB resources that base station possesses give (M- enough
M), can be without overlapping to M-m cluster head equipment distribution RB resource block, in that case, when cluster head is set during individual cluster head equipment
During for uploading business datum by the RB resource blocks of distribution to base station, base station can receive each cluster head equipment hair with ensuring escapement from confliction
The upstream data sent.On the contrary, when the up RB inadequate resources possessed when base station are to give M-m cluster head equipment, then using base
The mode of resource of standing multiple users share distributes RB resources to each cluster head equipment.
When base station is that each cluster head equipment distributes RB resource blocks, base station will distribute to 1~UEM-m of cluster head equipment UE
Specific resource block notify each cluster head equipment so that allow each cluster head equipment it is subsequent exempt from scheduling access procedure according to
The RB resource blocks of distribution carry out data transmission.
In one embodiment of the invention, methods described also includes：For the cluster head equipment with repetition lead code, if
Back off time is put, when after back off time, base station notifies each cluster head equipment to send leading after updating to base station again
Code.
There is the cluster head equipment for repeating targeting sequencing for above-mentioned, back off time t can be set, when by back off time t
Afterwards, targeting sequencing is randomly selected again with each the cluster head equipment for repeating targeting sequencing, and sent to base station after renewal
Targeting sequencing, repeats above-mentioned steps.I.e. base station returns to response message according to targeting sequencing to cluster head equipment, then each
Individual cluster head equipment sends up signaling to base station, and RB resource information of the base station according to needed for up signaling is cluster head equipment point
With corresponding RB resource blocks.The process for distributing resource block is same as mentioned above.
In one embodiment of the invention, in the step S22b base station according to owned upstream data resource with
And the RB resources needed for each cluster head equipment, it is that the corresponding RB resource blocks of each cluster head equipment distribution are specifically included：Work as base
When the upstream data resource stood gives each cluster head equipment enough, corresponding RB is distributed to each cluster head equipment without overlapping
Resource block；When the upstream data inadequate resource of base station to give during each cluster head equipment, using base station resource multiple users share
Mode to each cluster head equipment distribute RB resource blocks.
In the prior art scheme, during cluster head equipment transmits data to base station, generally there are two schemes, the first
Scheme is by the way of scheduling, in the first access base station of specially all cluster head equipment, then from base station to each cluster head
Equipment distributes RB resources, the problem of generally resource contention is not resulted in by the way of scheduling, but can increase signaling consumption.For
Reduce the signaling consumption in data transmission procedure, second scheme is all cluster head equipment elder generations using by the way of exempting from scheduling
The random resource for obtaining base station, then transmits data to base station by the resource that obtains at random, can so cause resource contention to ask
Topic, such as, 10 cluster head equipment access first piece of RB resource simultaneously, this when, can cause resource contention, some cluster head equipment
The data transmitted to base station have very big delay.The design complexities of SIC receivers are also increased simultaneously, SIC receivers
Design complexities are relevant with the number of users of each piece of RB resource, and customer volume is more, and the design complexities of SIC receivers can be got over
It is high.
And the present embodiment cluster head equipment to base station transmit data during, be also using exempt from dispatch by the way of, in order to
The problem of reducing the design complexities of SIC receivers, during carrying out RB resource block distribution to multiple cluster head equipment in base station,
, can be without overlapping to M-m cluster head equipment distribution when the up RB resources that base station possesses give M-m cluster head equipment enough
RB resource blocks, in that case, when cluster head equipment uploads business datum to base station by the RB resource blocks of distribution, base station can
The upstream data of each cluster head equipment transmission is received with ensuring escapement from confliction.On the contrary, the up RB inadequate resources possessed when base station
To give during M-m cluster head equipment, then RB resources are distributed to each cluster head equipment by the way of base station resource multiple users share.
Specifically, to base station resource block according to FB1~FBM-mDivide, when having divided FBiAfterwards, base station resource is not enough allocated to FBi+1, then
Start anew to divide FB to base station resourcei+1~FBM-m, the division position until completing all demands realizes that base station resource is used
Share at family.In the present embodiment when base station resource is inadequate, it is that each cluster head equipment distributes RB resources by way of circulation to be,
One piece of RB resource of excessive cluster head collaborative share can be so avoided, reduces the design complexities of SIC receivers in base station, also keeps away
Exempt to cause the congestion of data transfer.It can not only be retained using the method for the present embodiment and exempt from the excellent of scheduling scheme reduction signaling consumption
Point, exempts from the problem of scheduling scheme access number is limited while can solve the problem that, further increases access number tolerance limit originally.
Base station is that each cluster head equipment is assigned with after corresponding RB resource blocks, and the resource block of distribution is notified to corresponding
Cluster head equipment so that cluster head equipment believes transmission services data according to the RB resource blocks of distribution to base station.
Resource is distributed to cluster head equipment in advance in the present embodiment, after the completion of resource allocation, cluster head equipment, which is used, exempts from scheduling
Mode directly uploads business datum according to the resource of distribution to base station, without while data are uploaded, asking base station to be distributed
Corresponding resource, can improve the efficiency of business data transmission.
It is the MTC device data transmission system of the cluster compression of another embodiment of the present invention referring to Fig. 3, including it is multiple
MTC device and base station, wherein, multiple cluster head equipment are chosen from all MTC devices.The base station, for according to business number
According to correlation cluster division is carried out to all MTC device, and choose corresponding cluster head equipment for each cluster；Each
The cluster head equipment, carries out collecting compression, and will collect after compression for the business datum to all MTC devices in the cluster
Business datum be uploaded to base station.
Base station carries out cluster division to the MTC device for needing to access according to business correlation, and is chosen for each cluster
Corresponding cluster head equipment.Clustering has been carried out to all MTC devices and corresponding cluster head has been have chosen for each cluster
After equipment, the cluster head equipment in each cluster carries out collecting compression to the business datum of all MTC devices in the cluster, and
The business datum collected after compression is uploaded to base station.
Wherein, the base station is used to carry out cluster division to all MTC devices according to the correlation of business datum, and is
Each cluster is chosen corresponding cluster head equipment and specifically included：
Multiple cluster head equipment are chosen according to preparatory condition from all MTC devices, and store each cluster head equipment
Service data information；Calculate the service data information and each cluster head equipment of each MTC device in addition to cluster head equipment
Service data information between correlation, cluster head equipment and MTC device are clustered according to correlation, the cluster head after cluster
Equipment and MTC device composition cluster.
Described base station according to preparatory condition from all MTC devices during multiple cluster head equipment are chosen, also
For：
The correlation between the business datum for the multiple cluster head equipment chosen is calculated, when correlation exceedes the cluster of predetermined threshold value
When head apparatus has multiple, therefrom retain a cluster head equipment, other cluster head equipment are used as common MTC device.
Each described cluster head equipment, carries out collecting compression for the business datum to all MTC devices in the cluster
Specifically include：
Other all MTC device broadcast request signalings of the cluster head equipment into the cluster in each cluster, and receive
Each MTC device in cluster is according to the demand signalling received, to the transmission data frame of cluster head equipment；And by each
Identical information in the data frame of MTC device is removed, and the distinctive information in the data frame of each MTC device is combined, then
Distinctive information after the identical information and combination is combined, final data frame is formed.
Each described cluster head equipment, is specifically included for the business datum collected after compression to be uploaded into base station：
Cluster head equipment in each cluster is set up with base station and be connected, and to the up signaling of base station transmission, wherein, it is described on
Row signaling includes required RB resources；The notification that base station is sent is received, wherein, the notification is base station according to certainly
RB resources needed for upstream data resource and each cluster head equipment that body possesses, are that the distribution of each cluster head equipment is corresponding
After RB resource blocks, sent to each cluster head equipment, the notification includes the RB distributed to each cluster head equipment
Resource block；By the RB resource blocks of distribution by collect industry after business datum be uploaded to base station.
Cluster head equipment in each described cluster is set up with base station to be connected, and is specifically wrapped to the base station up signaling of transmission
Include：
Cluster head equipment in each cluster sends lead code to base station；And the response message of base station return is received, wherein,
The response message is when base station is sent to the corresponding cluster head equipment of all unduplicated lead codes；And when cluster head equipment connects
When receiving the response message of base station transmission, up signaling is sent to base station, the up signaling includes required RB resources.
The base station is additionally operable to：For with the cluster head equipment for repeating lead code, setting preset time, when by presetting
Between after, notify each cluster head equipment again to base station send update after lead code.
The base station, for the RB moneys according to needed for owned upstream data resource and each cluster head equipment
Source, is that the corresponding RB resource blocks of each cluster head equipment distribution are specifically included：
When the upstream data resource of base station gives each cluster head equipment enough, each cluster head equipment is given without overlapping
Distribute corresponding RB resource blocks；
When the upstream data inadequate resource of base station to give during each cluster head equipment, using base station resource multiple users share
Mode to each cluster head equipment distribute RB resource blocks.
The MTC device data transmission method and system for a kind of cluster compression that the present invention is provided, are first according to MTC device number
Carry out cluster division according to type, cluster head equipment chosen in cell according to given standard, and by cluster thick division strategy with
Cluster adjustable strategies complete the clustering to all devices.Then, MTC devices all in cluster are collected at cluster head equipment
Data message, and by data compression reduce redundancy, improve the efficiency of magnanimity MTC device efficient data transfer, effectively solution
Determined a large amount of MTC device access base stations when the congestion problems that face.Afterwards, cluster head equipment uses the pre-allocation of resources based on prediction
Scheme, the i.e. required resource first to cluster head equipment are allocated so that when cluster head equipment is to base station transmission data, by exempting from scheduling
Mode directly transmit compression after packet, reduce SIC receivers processing complexity, while also providing guarantee magnanimity
The ability of mMTC efficient data transfers.
Finally, the present processes are only preferably embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of MTC device data transmission method of cluster compression, it is characterised in that including：
S1, carries out cluster division to all MTC devices, and choose for each cluster according to the correlation of service data information
Corresponding cluster head equipment；
Cluster head equipment in S2, each cluster carries out collecting compression to the business datum of all MTC devices in the cluster, and
The business datum collected after compression is uploaded to base station.
2. the MTC device data transmission method of cluster compression as claimed in claim 1, it is characterised in that the step S1 tools
Body includes：
S11, chooses multiple cluster head equipment, and store each cluster head equipment from all MTC devices according to preparatory condition
Service data information；
S2, calculates the service data information and each cluster head equipment of each MTC device in addition to multiple cluster head equipment
Correlation between service data information, is clustered according to correlation to cluster head equipment and MTC device, and the cluster head after cluster is set
Standby and MTC device constitutes cluster.
3. the MTC device data transmission method of cluster compression as claimed in claim 2, it is characterised in that the step S11 is also
Including：
The correlation between the service data information for the multiple cluster head equipment chosen is calculated, when correlation exceedes the cluster of predetermined threshold value
When head apparatus has multiple, therefrom retain a cluster head equipment, other cluster head equipment are used as common MTC device.
4. the MTC device data transmission method of cluster compression as claimed in claim 3, it is characterised in that in the step S2
Business datum progress of the cluster head equipment to all MTC devices in the cluster in each cluster collects compression and specifically included：
Other all MTC device broadcast request signalings of the cluster head equipment into the cluster in S21a, each cluster；
S22a, receives the data frame that each MTC device in cluster is sent, wherein, the data frame is MTC device according to connecing
The demand signalling received is sent to cluster head equipment；
S23a, cluster head equipment removes the identical information in the data frame of each MTC device, and by each MTC device
Distinctive information combination in data frame, then the distinctive information after the identical information and combination is combined, form final converge
Data frame after total compression.
5. the MTC device data transmission method of cluster compression as claimed in claim 4, it is characterised in that in the step S2
The business datum collected after compression is uploaded to base station and specifically included by each cluster head equipment：
Cluster head equipment in S21b, each cluster is set up with base station to be connected, and sends up signaling to base station, wherein, it is described
Up signaling includes required RB resources；
S22b, each cluster head equipment receives the notification that base station is sent, wherein, the notification is base station according to itself
RB resources needed for the upstream data resource and each cluster head equipment that possess, are that each cluster head equipment distributes corresponding RB
After resource block, sent to each cluster head equipment, the notification includes the RB moneys distributed to each cluster head equipment
Source block；
The business datum collected after compression is uploaded to base station by S23b, each cluster head equipment by the RB resource blocks of distribution.
6. the MTC device data transmission method of cluster compression as claimed in claim 5, it is characterised in that the step S21b
Specifically include：
Cluster head equipment in each cluster sends lead code to base station；
The response message that base station is returned is received, wherein, the response message is when base station is corresponding to all unduplicated lead codes
Cluster head equipment send；
When cluster head equipment receives the response message of base station transmission, send in up signaling, the up signaling and wrap to base station
Include required RB resources.
7. the MTC device data transmission method of cluster compression as claimed in claim 6, it is characterised in that methods described is also wrapped
Include：
For with the cluster head equipment for repeating lead code, back off time being set, when after back off time, base station notifies each
Cluster head equipment sends the lead code after updating to base station again.
8. the MTC device data transmission method of cluster compression as claimed in claim 7, it is characterised in that the step S22b
RB resource of the middle base station according to needed for owned upstream data resource and each cluster head equipment, is that each cluster head is set
Back-up is specifically included with corresponding RB resource blocks：
When the upstream data resource of base station gives each cluster head equipment enough, distributed without overlapping to each cluster head equipment
Corresponding RB resource blocks；
When the upstream data inadequate resource of base station to give during each cluster head equipment, using the side of base station resource multiple users share
Formula distributes RB resource blocks to each cluster head equipment.
9. the MTC device data transmission method of cluster compression as claimed in claim 8, it is characterised in that the use base station
The mode of resource multiple users share is specifically included to each cluster head equipment distribution RB resource blocks：
To base station resource block according to FB1~FBM-mDivide, when having divided FBiAfterwards, base station resource is not enough allocated to FBi+1, then from the beginning
Start to divide FB to base station resourcei+1~FBM-m, the division position until completing all demands realizes that base station resource multi-user is total to
Enjoy；
Wherein, M-m refers to the number of the corresponding cluster head equipment of all unduplicated lead codes, and i is one in all cluster head equipment
Cluster head equipment identity.
10. a kind of MTC device data transmission system of cluster compression, it is characterised in that including multiple MTC devices and base station, its
In, multiple cluster head equipment are chosen from all MTC devices；
The base station, carries out cluster division to all MTC devices, and be each cluster for the correlation according to business datum
Mass selection takes corresponding cluster head equipment；
Each described cluster head equipment, carries out collecting compression for the business datum to all MTC devices in the cluster, and will
Collect the business datum after compression and be uploaded to base station.
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