CN106604207A - Method for packet-based cell access and selection in M2M communication - Google Patents
Method for packet-based cell access and selection in M2M communication Download PDFInfo
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- CN106604207A CN106604207A CN201611069710.5A CN201611069710A CN106604207A CN 106604207 A CN106604207 A CN 106604207A CN 201611069710 A CN201611069710 A CN 201611069710A CN 106604207 A CN106604207 A CN 106604207A
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- mtcd
- equipment
- group
- access
- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
Abstract
The invention provides a method for packet-based cell access and selection in M2M communication. The method includes Machine Type Communications Devices (MTCD)s are grouped according to service characteristics of the MTCDs, and a head MTCD is determined for each group; the head MTCD devices send access request signaling to a base station, and the base station broadcast its own status information after receiving the access request signaling, wherein the status information includes available subcarrier and remaining power space of each subcarrier; and the head MTCD judge whether to request access to the base station according to the status information and the service characteristics of all the MTCDs of its group. According to the method for packet-based cell access and selection in M2M communication, the MTCDs which have the same service and are close in distance are grouped, application and selection of cell access are performed using group as a unit, a signaling storm generated in mass separate application of MTCDs can be avoided, and congestion of a PUCCH is effectively avoided.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly in a kind of M2M communications packet-based cell access with
System of selection.
Background technology
With the fast development of M2M (Machine to machine, machine to machine) business, M2M and LTE-A (LTE-
Advanced) the fusion of network is the inexorable trend of future communications development, while being also in the 5th third-generation mobile communication (5G)
Individual important application scene.But this also proposes some new challenges to the M2M communications based on LTE-A network.Due to M2M number of devices
Amount is numerous, and is mainly communicated up, therefore up scheduling of resource is one of subject matter urgently to be resolved hurrily.
M2M communications have so several features：
M2M number of devices is huge, is higher by several orders of magnitude of H2H (human-to-human, people is to people) number of devices.Have
Report points out that the H2H numbers of users and M2M number of devices enlivened in a cell is probably respectively 50 and 30000,
The single cell of 3GPP suggestions should support at least 1000 MTCD equipment.
The packet that M2M equipment sends is in interior change on a large scale.Such as conventional measuring device send possibility be
The data of several bits, and similar to video equipment as monitoring probe, data volume is up to Mbps ranks.
The requirement of QoS (Quality of Service, service quality) is also different.Some equipment is time tolerance, than
Such as periodically report intelligent electric meter, the water meter equipment of some readings；And have plenty of strict temporal constraints, such as monitor and accuse
The equipment of alert type.Its handling capacity of the equipment of different application scene and packet loss etc. require also different.
The triggering mode of reported data is different.Have plenty of periodically, have plenty of event triggering.
Hypomobility.M2M device locations are fixed, infrequently moved or the low speed movement in the region for limiting.
Due to the requirement of M2M communications, usually MTCD (Machine Type Communications Device, machine
Class communication equipment) data volume that reports is far longer than base station or MTCG (Machine Type Communications
Gateway, machine type communication gateway) send control signaling data volume, therefore upstream data scheduling and resource allocation be
Principal contradiction, and this point is just contrary with the communication feature of cellular network.
The characteristics of being communicated due to above M2M, the characteristics of be especially considering that MTCD magnanimity, if multiple MTCD are accessed simultaneously
Macrocell is clearly irrational, because the number of devices that each macrocell can be accommodated is limited, and so many equipment
Sending access request to macro cell base station simultaneously will bring a large amount of signaling consumptions.Meanwhile, macro base station overload, and surrounding is little
Base station may cause the waste of load imbalance and the energy for thus bringing without enough multi-users again.
The content of the invention
The embodiment provides packet-based cell is accessed and system of selection in a kind of M2M communications, to realize
The channel block for avoiding the MTCD equipment of magnanimity from producing when individually applying.
To achieve these goals, this invention takes following technical scheme.
Packet-based cell is accessed and system of selection in a kind of M2M communications, including：
Each MTCD equipment is grouped according to the service feature of equipment for machine type communication MTCD, to each group one is determined
Individual group leader MTCD equipment；
The group leader MTCD equipment to base station sends access request signaling, and the base station receives the access request signaling
The status information of oneself is broadcasted afterwards, and the status information includes：Available subcarrier and the remaining power space of each subcarrier；
The group leader MTCD equipment is sentenced according to the service feature of the status information and all MTCD equipment of its place group
It is disconnected whether to ask to access the base station.
Further, the described service feature according to MTCD equipment is grouped to each MTCD equipment, gives each group
Determine group leader's MTCD equipment, including：
According to the service feature of each MTCD equipment, the MTCD equipment with identical services characteristic is divided into a cluster, will
MTCD equipment in one cluster in the range of specified location is divided into one group, and to each component group ID is matched somebody with somebody, according to the rule of setting
Group leader's MTCD equipment is selected in all MTCD equipment from each group, by the report cycle of the MTCD equipment in each group
Identical time point and cycle are adjusted to, the traffic performance includes：QoS, time delay tolerance thresholding, data transmitting period, residue
Channel condition information between electricity, minimum time lead and base station, internal memory and when sending data in required relief area at least
One.
Further, a group leader is selected in the described all MTCD equipment according to the rule of setting from each group
MTCD equipment, including：
The most MTCD equipment of dump energy is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
The best MTCD equipment of channel status is selected and base station between in all MTCD equipment from each group as group
Long MTCD equipment；
Or,
The MTCD equipment of minimum time lead is selected to set as group leader MTCD in all MTCD equipment from each group
It is standby；
Or,
The maximum MTCD equipment of internal memory is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
Select in all MTCD equipment from each group full group send required relief area during data it is minimum or maximum or
Person is closest to the full MTCD equipment for organizing average buffer level as group leader's MTCD equipment.
Further, described method also includes：
Quantity K of the MTCD equipment in each group is determined by following formula：
K=(capacity of nTB × each TB)/each MTCD equipment resource requirement
Wherein, nTB is the TB quantity matched somebody with somebody to the component；
Allocate a device call number to each the MTCD equipment in group, the ID=group ID+ equipment call numbers of MTCD equipment.
Further, described method also includes：
A special access group will be classified as dedicated for the special installation of monitoring and alarm type, the special access group is not
Setting accesses group leader, and special access group setting group ID, each MTCD equipment in the special access group has an end
End call number, the ID=group ID+ equipment call numbers of MTCD equipment.
Further, described group leader MTCD equipment to base station sends access request signaling, and the base station receives described
The status information of oneself is broadcasted after access request signaling, the status information includes：Available subcarrier and each subcarrier are remaining
Power space, including：
Set out according to the power consumption calculation of all MTCD equipment of place group the maximum work of order of delivering letters as the MTCD of group leader
Rate intensity, according to the transmit power than the peak power low intensity access request signaling is sent；
Each eNB and other small-cell base stations are received after the access request signaling, and oneself is broadcasted on a different frequency
Status information, the status information includes：Available subcarrier and the remaining power space of each subcarrier.
Further, described group leader MTCD equipment is according to all MTCD equipment of the status information and its place group
Service feature judges whether that request accesses the base station, including：
Group leader's MTCD equipment is received after the status information of base station broadcast, extracts the available sub- load in the status information
Involve the remaining power space of each subcarrier, when the remaining power space of available subcarrier is more than the resource requirement of place group
When, then judge that place group can access the cell of the base station, sending access cell to the base station on an access channel please
Signaling is sought, the resource requirement of all MTCD equipment of place group is carried in the access cell request signaling, the place group
Resource requirement is the resource requirement sum of all MTCD equipment of place group；
The base station is received after the access cell request signaling, when the institute carried in the access cell request signaling
Group all MTCD equipment resource requirement less than the remaining power space of its available subcarrier, what oneself to be accommodated
Remaining users number then allows group leader MTCD equipment place group to access little more than the sum of the MTCD equipment of the place group
Area.
Further, described method also includes：
Described access also carries the service priority information of place group in cell request signaling, when the base station receive it is many
The access cell request signaling that individual group leader MTCD equipment sends, and each accesses the place group of carrying in cell request signaling
The resource requirement of all MTCD equipment is less than the remaining power space of its available subcarrier, the residue oneself to be accommodated use
After sum of the amount more than the MTCD equipment of the place group, then compare the service priority of each group, it is allowed to service priority
Higher group accesses cell.
Further, described method also includes：
When place group is not also successfully accessed cell after the time period for setting, group leader MTCD equipment improves access request
The transmit power of signaling, according to the transmit power after raising the access request signaling, the raising are sent on an access channel
Peak power intensity of the transmit power afterwards less than the transmission signaling of the place group；Or, it is special that group leader MTCD equipment sends
Distress signal, promotes the neighbouring base station revival in sleep pattern to realize cell access.
Further, described method also includes：
Group leader MTCD equipment have sent on an access channel after request access signaling, intercept on the access channel, such as
Fruit listens to the request access signaling that other group leader MTCD equipment send, then the request access signaling to listening to is parsed,
When parsing finds that the Target cell in the request access signaling sent with oneself is identical, also, the priority of the group for parsing
It is higher than the priority of oneself place group, then when changing the Target cell asked in access signaling of oneself transmission or keeping out of the way one section
Between after retransmit request access signaling.
The technical scheme provided by embodiments of the invention described above can be seen that the embodiment of the present invention by setting based on MTCD
It is the characteristics of standby magnanimity, business is identical and be grouped apart from close MTCD equipment, carry out cell access in units of group
Application and selection, the signaling storm that the MTCD equipment of magnanimity can be avoided to produce when individually applying, effectively prevent PUCCH letter
The obstruction in road.
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the handling process of a kind of packet-based cell selection provided in an embodiment of the present invention and the method for accessing
Figure；
Fig. 2 is a kind of schematic diagram being grouped to MTCD equipment provided in an embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
Same or similar element is represented to same or similar label eventually or the element with same or like function.Below by ginseng
The embodiment for examining Description of Drawings is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " " used herein, "
It is individual ", " described " and " being somebody's turn to do " may also comprise plural form.It is to be further understood that arranging used in the description of the present invention
Diction " including " refers to there is the feature, integer, step, operation, element and/or component, but it is not excluded that existing or adding
One or more other features, integer, step, operation, element, component and/or their group.It should be understood that when we claim unit
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also exist
Intermediary element.Additionally, " connection " used herein or " coupling " can include wireless connection or couple.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combination.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein are (including technology art
Language and scientific terminology) have with art of the present invention in those of ordinary skill general understanding identical meaning.Should also
It is understood by, those terms defined in such as general dictionary should be understood that the meaning having with the context of prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or excessively formal implication is explaining.
For ease of the understanding to the embodiment of the present invention, do by taking several specific embodiments as an example further below in conjunction with accompanying drawing
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
Based on above the problems of the prior art, the embodiment of the present invention proposes a kind of packet-based cell and selects and connect
The method for entering, can both be prevented effectively from macro base station overload, it is also possible to which the cell for realizing magnanimity MTCD accesses problem.
The handling process of above-mentioned packet-based cell selection and the method for accessing is as shown in figure 1, including following process
Step：
Step 1, each MTCD equipment is grouped according to the service feature of equipment for machine type communication MTCD, gives each group
Determine group leader's MTCD equipment.
Fig. 2 is a kind of schematic diagram being grouped to MTCD equipment provided in an embodiment of the present invention.The packet of MTCD equipment
Process includes three processes of determination of sub-clustering, packet and group leader, first according to the service feature of each MTCD equipment, having
The MTCD equipment of identical services characteristic is divided into a cluster.On the basis of cluster, by the MTCD in the range of specified location in a cluster
Equipment is divided into one group, and to each component group ID is matched somebody with somebody, and the traffic performance includes：QoS (Quality of Service, clothes
Business quality), time delay tolerance thresholding, channel status between data transmitting period, dump energy, minimum time lead and base station
At least one when information, internal memory and transmission data in required relief area.
Quantity K of the MTCD equipment in each group is determined by following formula：
K=(capacity of nTB × each TB)/each MTCD equipment resource requirement
Wherein, nTB is the TB quantity matched somebody with somebody to the component；
Allocate a device call number to each the MTCD equipment in group, the ID=group ID+ equipment call numbers of MTCD equipment.
For the ease of the storage and management of information, by No. ID of the member's MTCD equipment in group continuous distribution is set to.Each TB
The capacity of (Transmission Block, transmission resource block) sets according to practical situation.
Then, group leader's MTCD equipment is selected in all MTCD equipment according to the rule of setting from each group, it is right
In enrolled equipment is commonly connect, if necessary to periodicity reported data, the report cycle of the member in the group can be adjusted to
Identical time point and cycle.The determination of group leader can use following different rule according to different application scenarios.These letters
Breath base station can obtain after Stochastic accessing success and when carrying out channel measurement, wrap by the rule of the setting of above-mentioned determination group leader
Include：
The most MTCD equipment of dump energy is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
The best MTCD equipment of channel status is selected and base station between in all MTCD equipment from each group as group
Long MTCD equipment；
Or,
The MTCD equipment of minimum time lead is selected to set as group leader MTCD in all MTCD equipment from each group
It is standby；
Or,
The maximum MTCD equipment of internal memory is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
Select in all MTCD equipment from each group full group send required relief area during data it is minimum or maximum or
Person is closest to the full MTCD equipment for organizing average buffer level as group leader's MTCD equipment.
A special access group will be classified as dedicated for the special installation of monitoring and alarm type, for special access group,
Because the member of the group is the equipment that some have monitoring and alarm function, its QoS is with the time and cycle for initiating request very
Hardly possible prediction (basic to say without the cycle), while desired time delay is also very strict, therefore is not group setting group leader, the access
Member in group will automatically initiate when needed uplink scheduling request, and detailed process is identical with normal LTE equipment.Special access
Group setting group ID, ID=groups ID+ that each the MTCD equipment in special access group has a terminal call number, MTCD equipment set
Standby call number.
By the purpose that MTCD equipment is grouped be by traffic performance identical MTCD cluster tool together, then by group
Length represents the whole group of request for carrying out ascending resource, so will avoid as far as possible due to sending during independent MTCD equipment application resource
SR (Scheduling Request, dispatch request) information cause PUCCH (Physical Uplink Control CHannel,
Physical uplink control channel) channel block.
When a new MTCD equipment first time access network, after Stochastic accessing success, MTCD equipment can be to base station
Report its corresponding M2M traffic performance.The traffic performance that base station reports according to this MTCD equipment, is that this MTCD distributes group ID
With equipment call number, when the MTCD numbers of the packet belonging to this MTCD are more than maximum set in advance, base station is added automatically
One group ID, i.e., a newly-built packet.Each member both knows about its place and meets enrolled group of ID, and the ID will be used to believe in PDCCH
The mask used when sending common signaling on road, so as to reduce the signalling loads of PDCCH channels.
Step 2, group leader MTCD equipment to base station sends access request signaling.The base station receives the access request letter
The status information of oneself is broadcasted after order, the status information includes：Available subcarrier and the remaining power space of each subcarrier.
After MTCD equipment is grouped according to identical type of service, then access request is initiated by group leader.From saving
The angle of MTCD power consumptions, sets out order of delivering letters as the MTCD of group leader according to the power consumption calculation of all MTCD equipment of place group
Peak power intensity, according to the transmit power than the peak power low intensity access request signaling is sent.
Each eNB and SBS (Small Cell Base Station, small-cell base station) receive the access request signaling
Afterwards, the status information of oneself is broadcasted on a different frequency, and the status information includes：Available subcarrier and each subcarrier are remaining
Power space.Note, in order to avoid the collision of multiple signalings, the broadcast message should be frequency division, i.e., on a different frequency
Broadcast.
After eNB and SBS contain new user again, eNB and SBS will change the status information of oneself, in new access week
Phase is broadcasted.
Step 3, group leader MTCD equipment judge according to the service feature of status information and all MTCD equipment of its place group
Whether request accesses the base station.
Group leader's MTCD equipment is received after the status information of base station broadcast, is judged whether that this can be accessed according to status information
Base station.Available subcarrier and the remaining power space of each subcarrier in status information is extracted, when available subcarrier residue
Power space more than place group resource requirement when, then judge that place group can access the cell of the base station, access
Send to the base station on channel and access cell request signaling, all of place group are carried in the access cell request signaling
The resource requirement of MTCD equipment, the resource requirement of the place group is the resource requirement sum of all MTCD equipment of place group.
If group leader MTCD equipment judges that the base station cannot be accessed according to status information, other base stations are continued waiting for and selected.
The base station is received after the access cell request signaling, when the institute carried in the access cell request signaling
Group all MTCD equipment resource requirement less than the remaining power space of its available subcarrier, what oneself to be accommodated
Remaining users number then allows group leader MTCD equipment place group to access little more than the sum of the MTCD equipment of the place group
Area.
In actual applications, the service priority information of place group is also carried in cell request signaling is accessed, when described
Base station receives the access cell request signaling that multiple group leader MTCD equipment send, and each accesses and is taken in cell request signaling
Less than the remaining power space of its available subcarrier, oneself cans the resource requirement of all MTCD equipment of the place group of band
After sum of the remaining users number of receiving more than the MTCD equipment of the place group, then compare the service priority of each group, permit
Perhaps the higher group of service priority accesses cell.
When place group is not also successfully accessed cell after the time period for setting, group leader MTCD equipment improves access request
The transmit power of signaling, according to the transmit power after raising the access request signaling, the raising are sent on an access channel
Peak power intensity of the transmit power afterwards less than the transmission signaling of the place group；Or, it is special that group leader MTCD equipment sends
Distress signal, promotes the neighbouring base station revival in sleep pattern to realize cell access.
For the group leader's MTCD equipment with D2D (Device-to-device, equipment direct communication) function, letter is being accessed
Request is sent on road and accesses signal, other times are then intercepted on this channel.If listening to other group leader MTCD equipment to send
Request access signaling, then the request access signaling to listening to parse, when parsing find with oneself transmission request connect
The Target cell entered in signaling is identical, also, the priority of the priority ratio of the group for parsing oneself place group is high, then change
Oneself send request access signaling in Target cell or keep out of the way a period of time after retransmit request access signaling.
In actual applications, if the MTCD number of devices under certain SBS is little, existing MTCD equipment is allowed to be transferred to it
Under his SBS equipment, the temporary close SBS equipment, to save electricity.
When MTCD equipment in certain cell is in longer sleep period, the SBS base stations can also carry out sleep pattern saving
Electricity.
In sum, the characteristics of embodiment of the present invention is by based on MTCD equipment magnanimity is identical and apart from close by business
MTCD equipment be grouped, the application and selection of cell access is carried out in units of group, the MTCD that can avoid magnanimity sets
The signaling storm produced during standby individually application, effectively prevent the obstruction of PUCCH channels.
The embodiment of the present invention avoids the burden of base station, and the load of base station is transferred in the cell of surrounding, realizes
Load balancing.Realize according to priority to select the MTCD groups that can be accessed, the higher group's cell of priority to access
Probability is bigger.Multiple MTCD groups are avoided while having exceeded the capacity limit of the cell when accessing certain SBS.
The embodiment of the present invention takes the method for stepping up sending signal power to save the energy consumption of MTCD equipment, takes
SBS sleep patterns and SBS " shut " mode"s, effectively save SBS energy consumptions.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of one embodiment, module in accompanying drawing or
Flow process is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
Realize by the mode of software plus required general hardware platform.Based on such understanding, technical scheme essence
On prior art is contributed part in other words can be embodied in the form of software product, the computer software product
Can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment
(can be personal computer, server, either network equipment etc.) performs some of each embodiment of the invention or embodiment
Method described in part.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Apparatus and system embodiment described above is only schematic, wherein the conduct
Separating component explanation unit can be or may not be it is physically separate, can be as the part that unit shows or
Person may not be physical location, you can be located at a place, or can also be distributed on multiple NEs.Can be with root
The factually purpose for needing to select some or all of module therein to realize this embodiment scheme on border.Ordinary skill
Personnel are not in the case where creative work is paid, you can to understand and implement.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (10)
1. packet-based cell is accessed and system of selection in a kind of M2M communications, it is characterised in that included：
Each MTCD equipment is grouped according to the service feature of equipment for machine type communication MTCD, to each group a group is determined
Long MTCD equipment；
The group leader MTCD equipment to base station sends access request signaling, and the base station receives wide after the access request signaling
The status information of oneself is broadcast, the status information includes：Available subcarrier and the remaining power space of each subcarrier；
The group leader MTCD equipment judges according to the service feature of the status information and all MTCD equipment of its place group
No request accesses the base station.
2. method according to claim 1, it is characterised in that the described service feature according to MTCD equipment is to each
MTCD equipment is grouped, and to each group group leader's MTCD equipment is determined, including：
According to the service feature of each MTCD equipment, the MTCD equipment with identical services characteristic is divided into a cluster, by one
MTCD equipment in cluster in the range of specified location is divided into one group, and to each component group ID is matched somebody with somebody, according to the rule of setting from every
Group leader's MTCD equipment is selected in all MTCD equipment in individual group, the report cycle of the MTCD equipment in each group is adjusted
For identical time point and cycle, the traffic performance includes：QoS, time delay tolerance thresholding, data transmitting period, dump energy,
At least one between minimum time lead and base station when channel condition information, internal memory and transmission data in required relief area.
3. method according to claim 2, it is characterised in that the described rule according to setting is all from each group
Group leader's MTCD equipment is selected in MTCD equipment, including：
The most MTCD equipment of dump energy is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
The best MTCD equipment of channel status is selected and base station between in all MTCD equipment from each group as group leader
MTCD equipment；
Or,
The MTCD equipment of minimum time lead is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
The maximum MTCD equipment of internal memory is selected in all MTCD equipment from each group as group leader's MTCD equipment；
Or,
Full group is selected to send required relief area during data in all MTCD equipment from each group minimum either maximum or most
The MTCD equipment of full group average buffer level is close to as group leader's MTCD equipment.
4. method according to claim 3, it is characterised in that described method also includes：
Quantity K of the MTCD equipment in each group is determined by following formula：
K=(capacity of nTB × each TB)/each MTCD equipment resource requirement
Wherein, nTB is the TB quantity matched somebody with somebody to the component；
Allocate a device call number to each the MTCD equipment in group, the ID=group ID+ equipment call numbers of MTCD equipment.
5. method according to claim 1, it is characterised in that described method also includes：
A special access group will be classified as dedicated for the special installation of monitoring and alarm type, the special access group does not set
Group leader is accessed, special access group setting group ID, each MTCD equipment in the special access group has a terminal rope
Quotation marks, the ID=group ID+ equipment call numbers of MTCD equipment.
6. the method according to any one of claim 1 to 5, it is characterised in that send out described group leader MTCD equipment to base station
Access request signaling, the base station is sent to receive and broadcast the status information of oneself after the access request signaling, the status information
Including：Available subcarrier and the remaining power space of each subcarrier, including：
As group leader MTCD set out according to the power consumption calculation of all MTCD equipment of place group deliver letters order peak power it is strong
Degree, according to the transmit power than the peak power low intensity access request signaling is sent；
Each eNB and other small-cell base stations are received after the access request signaling, and the state of oneself is broadcasted on a different frequency
Information, the status information includes：Available subcarrier and the remaining power space of each subcarrier.
7. method according to claim 6, it is characterised in that described group leader MTCD equipment according to the status information and
The service feature of all MTCD equipment of its place group judges whether that request accesses the base station, including：
Group leader's MTCD equipment is received after the status information of base station broadcast, extract available subcarrier in the status information and
The remaining power space of each subcarrier, when resource requirement of the remaining power space of available subcarrier more than place group,
Then judge that place group can access the cell of the base station, send to the base station access cell request letter on an access channel
Order, it is described access cell request signaling in carry place group all MTCD equipment resource requirement, the place group it is required
Resource is the resource requirement sum of all MTCD equipment of place group；
The base station is received after the access cell request signaling, when the place group carried in the access cell request signaling
All MTCD equipment resource requirement less than the remaining power space of its available subcarrier, the residue oneself to be accommodated
Number of users then allows group leader MTCD equipment place group to access cell more than the sum of the MTCD equipment of the place group.
8. method according to claim 7, it is characterised in that described method also includes：
It is described to access the service priority information that place group is also carried in cell request signaling, when the base station receives multiple groups
The place group of carrying is all in the access cell request signaling that long MTCD equipment sends, and each access cell request signaling
The resource requirement of MTCD equipment is less than the remaining power space of its available subcarrier, the remaining users number oneself to be accommodated
After sum more than the MTCD equipment of the place group, then compare the service priority of each group, it is allowed to which service priority is higher
Group access cell.
9. method according to claim 6, it is characterised in that described method also includes：
When place group is not also successfully accessed cell after the time period for setting, group leader MTCD equipment improves access request signaling
Transmit power, the access request signaling is sent on an access channel according to the transmit power after raising, after the raising
Peak power intensity of the transmit power less than the transmission signaling of the place group；Or, group leader MTCD equipment sends special emergency
Signal, promotes the neighbouring base station revival in sleep pattern to realize cell access.
10. method according to claim 8, it is characterised in that described method also includes：
Group leader MTCD equipment have sent on an access channel after request access signaling, intercept on the access channel, if detectd
The request access signaling that other group leader MTCD equipment send is heard, then the request access signaling to listening to is parsed, and works as solution
Analysis finds that the Target cell in the request access signaling sent with oneself is identical, also, the priority ratio of the group for parsing is certainly
The priority of own place group is high, then after changing the Target cell asked in access signaling of oneself transmission or keeping out of the way a period of time
Retransmit request access signaling.
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