CN103596224B - Resource regulating method based on multistage-mapping under a kind of high-speed mobile environment - Google Patents
Resource regulating method based on multistage-mapping under a kind of high-speed mobile environment Download PDFInfo
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Abstract
The present invention provides the resource regulating method based on multistage-mapping under a kind of high-speed mobile environment, and methods described, which is included on first order link, completes schedule level one；The 2G/3G/WiFi business datums transmitted on first order link are buffered in using the buffer queue pond at 2G/3G/WiFi ends at 2G/3G/WiFi ends；Then the data after caching are subjected to QCI virtual resource mappings, the 2G/3G/WiFi business datums of acquisition is subjected to first time priority ranking after mapping, 2G/3G/WiFi business datums are finally converted into TD LTE data；Second-level dispatching is completed on the link of the second level；The TD LTE data transmitted on the link of the second level are buffered in using the buffer queue pond at TD LTE ends at TD LTE ends, second of priority sequence is then carried out to the TD LTE data according to TD LTE ends QCI attributes, priority highest data are put in the first place transmission.The present invention is used as long range transmission channel by the use of 2G/3G/WiFi as short distance user access technology, by the use of TD LTE, it ensure that the resource reasonable distribution of all business of all users, the resource allocation of high-priority service is particularly ensure that, while takes into account inferior grade business.
Description
Technical field
The invention belongs to mobile broadband wireless communication technical field, is related to a kind of resource regulating method, more particularly to one
Resource regulating method based on multistage-mapping under kind high-speed mobile environment.
Background technology
In mobile broadband wireless communication technical field, resource scheduling algorithm, which can be applied to optical cable, can not reach the big of region
The large-scale wireless access of real time business, such as outlying rural area, mountain area, shadow fading in scope broadband access and high-speed mobile environment
Critical regions and bullet train etc..It is public that the resource scheduling algorithm that presently, there are includes Round-Robin Algorithm, max carrier to interference algorithm, ratio
Flat algorithm, they are mutually balanced between the handling capacity and fairness of network to reach the optimization of systematic function.
1. Round-Robin Algorithm（Round Robin, RR）
Polling algorithm is that each user is cyclically called in base station, is ensured using equal opportunity as all users in system point
With resource, user is taken Radio Resource according to the order of certain determination and communicated.Its main thought is, to sacrifice handling capacity
For cost, resource liberally is provided for each user in system in time, therefore, polling algorithm is also referred to as fair time tune
Spend algorithm.
But polling algorithm there is also it is fatal the shortcomings that.Due to not accounting for the difference of subscriber channel situation, when some use
It is able to may also be serviced during the channel condition very severe at family, therefore the reliability transmitted is not high, causes handling up for system
Rate is than relatively low.
2. max carrier to interference algorithm（Max C/I）
Max carrier to interference algorithm is when user is transmitted in selection, always prioritizing selection carrier/interface ratio（C/I）Those maximum users,
The best user occupancy resource of channel conditions and transmission data are always selected, when the channel condition of certain user in these users
When after variation or no longer needing to take whole resources, the best user of channel condition can be just selected in remaining user.
However, in mobile communications, the location of user difference, its received signal intensity is also different, it is maximum
Carrier/interface ratio algorithm has necessarily looked after user near from base station, that channel condition is good, and other are serviced from base station user farther out
Chance it is then seldom, the service coverage of base station is very small, and this dispatching algorithm is most inequitable.
3. proportional fair algorithm（Proportional Fair, PF）
The channel quality and the past period that user's current time is considered when proportional fair algorithm is scheduled obtain
Handling capacity.The pri function of proportional fair algorithm is：
Wherein, PIi(t) priority of the user i in moment t is represented；ri(t) the instantaneous number supported by user i in moment t
According to transmission rate, determined by the channel condition information of user；For average transmission rates of the user i before moment t.
The mobile terminal in access system ovelay range and resource can be uniformly managed using above-mentioned dispatching algorithm,
But significant scheduling delay and the great burden to base station disposal ability be present.The increasing of popularization and user in view of future network
More, in the case of access system high capacity, above-mentioned scheduling mechanism is to ensureing that it is very big unfavorable that the service quality of user has.
So in the environment of the heterogeneous network based on high-speed mobile, due to distributable Radio Resource be it is limited,
In order to realize the QoS of user terminal different business, it is necessary to design the resource scheduling algorithm under a high-speed mobile environment.
Therefore how in the double bounce transmitting procedure of user terminal, mobile relay gateway and ground base station ensure different user in difference
Rationally the resource such as effective distribution bandwidth is a user for realizing high-speed mobile in compartment from diverse access point on the basis of QoS
The key technology of access mobile communication standby backbone network.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide be based under a kind of high-speed mobile environment
The resource regulating method of multistage-mapping, for solving the problems, such as traffic resource assignment in heterogeneous network.
In order to achieve the above objects and other related objects, the present invention provides and is based on multistage-mapping under a kind of high-speed mobile environment
Resource regulating method, methods described includes：
S1, schedule level one is completed on first order link；Schedule level one uses 2G/3G/WiFi at 2G/3G/WiFi ends
The buffer queue pond at end；The buffer queue pond at the 2G/3G/WiFi ends is used to be buffered in what is transmitted on the first order link
2G/3G/WiFi business datums, the data after caching are then subjected to QCI virtual resource mappings, by the 2G/3G/ of acquisition after mapping
WiFi business datums carry out first time priority ranking, and 2G/3G/WiFi business datums finally are converted into TD-LTE data；Its
In, the first order link refers to the link between user terminal and high-speed mobile Tandem Gateway；
S2, second-level dispatching is completed on the link of the second level；Second-level dispatching is to use the queue at TD-LTE ends at TD-LTE ends
Buffer pool；The buffer queue pond at the TD-LTE ends is used to be buffered in the TD-LTE data transmitted on the second level link, so
Second of priority sequence is carried out to the TD-LTE data according to TD-LTE ends QCI attributes afterwards, and by priority highest number
According to transmission of putting in the first place；The second level link refers to the link between the high-speed mobile Tandem Gateway and ground base station.
Preferably, 2G/3G/WiFi ends are additionally included in the step S1 to use based on the preferential Call Admission Control of switching
Mechanism, the Call Admission Control mechanism are used to determine whether that a new connection is linked into network；The calling connects
The expression formula of controlling mechanism received is：
Wherein, NiRepresent the number of resource blocks that i-th of mobile handoff user reserves, pjRepresent that the access of j-th of new user is general
Rate, NnewjRepresent that j-th of new user accesses the number of resource blocks needed, NtotalAll number of resource blocks are represented, k represents reserved shifting
Dynamic switching total number of users, m represent the sum of new user.
Preferably, before the step S1 is additionally included in the completion QCI virtual resource mappings of 2G/3G/WiFi business datums,
SINR is added, and QCI priority parameters, i.e. Q factor are introduced in QCI virtual resource mapping mechanisms；Wherein, business i queues k exists
The expression formula of the dispatching algorithm of first order link is：
Wherein, Pi,kPriority of the expression business i queues k on first order link；δi,kExpression business i queues k packet loss
Rate, δi,k∈(0,1)；QI, k, QCI_priorityExpression business i queues k priority；SINRi,kK is in the first order for expression business i queues
The data transfer integrity degree at 2G/3G/WiFi ends；λi,k(t) head of the queue Packet Delay information of the business i queues k in moment t is represented,
λi,kThe maximum delay that expression business i queues k can tolerate；Qi,k(t) represent business i queues k in moment t length, Qi,kRepresent
Business i queues k maximum queue length.
Preferably, also include estimation channel resource block in the step S2, that is, estimate the resource block number to be transmitted.
Preferably, also include distribution channel resource block in the step S2, i.e., be TD- in descending order according to priority
LTE data distribution resource blocks；The distribution resource block adds the railway signal factor, i.e., when there is railway signal to occur, enters immediately
Row resource is seized, and is placed on first of all queues, is forwarded immediately；Wherein, business i expresses in the dispatching algorithm of second level link
Formula is：
Wherein, i*Priority of the expression business i on the link of the second level；I0=1, Ii(t) represent business i t whether
For railway signal；λiFor business i delay requirement, λi(t) it is time delays of the current business i at current time；QI, QCI_priorityTable
Show business i QCI grades；QI, coach_priorityRepresent the compartment priority of business i in train；Retransmit mark HHARQRepresent the number
According to whether be retransmit data.
Preferably, the resource block distributed using anti-interference adaptive locomotive antenna transmission is also included in the step S2；
The anti-interference adaptive locomotive antenna is respectively assembled at the headstock and the tailstock of train；The anti-interference adaptive locomotive antenna tool
There are instantaneous received power and predetermined threshold value, when the instantaneous power of the locomotive antenna of headstock is less than predetermined threshold value, then automatically switch
To the locomotive antenna transmission data of the tailstock；When the instantaneous received power of the locomotive antenna of the tailstock is less than predetermined threshold value, then open
The locomotive antenna scanning channel of headstock accesses next Remote Radio Unit of ground base station, then the locomotive day by headstock in advance
Line transmission resource block.
Preferably, also include using resource reservation mechanism in the step S2, the resource reservation mechanism refers to train
Locomotive antenna simultaneously, reports the portfolio size of this car to ground base station in transmission high ferro signal.
Preferably, also include in the step S2：Using resource reservation mechanism, the resource reservation mechanism refers to ground base
Stand and adaptively distribute bandwidth resources for train to the demand of business datum according to user terminal, and notify described anti-interference adaptive
Answer locomotive antenna.
Preferably, also include in the step S2：Using resource reservation mechanism, the resource reservation mechanism refers to ground base
Stand and bandwidth is divided into 1 ︰ 1 two sub- bandwidth, and notify the anti-interference adaptive locomotive antenna.
Preferably, the 2G/3G/WiFi ends include 2G micro-base stations, 3G micro-base stations and WiFi micro-base stations.
As described above, the resource regulating method based on multistage-mapping under high-speed mobile environment of the present invention, have with
Lower beneficial effect：
1st, rural area, 3rd area, shadow fading critical regions and the bullet train that can not be reached present invention can apply to optical cable etc.；
2nd, the present invention improves the entire throughput of vehicle-mounted bandwidth wireless access system and met between each user of system part
Fairness；
3rd, the present invention improves the utilization rate of limited bandwidth resource.
Brief description of the drawings
The high speed that Fig. 1 is shown as under the high-speed mobile environment of the present invention resource regulating method application based on multistage-mapping is moved
Dynamic resource management architecture schematic diagram.
The workflow that Fig. 2 is shown as the resource regulating method based on multistage-mapping under the high-speed mobile environment of the present invention is shown
It is intended to.
Fig. 3 is shown as the resource regulating method one-level based on multistage-mapping under the high-speed mobile environment of the invention of the present invention
Scheduling flow schematic diagram.
Fig. 4 is shown as under the high-speed mobile environment of the invention of the present invention in the resource regulating method based on multistage-mapping
The buffer queue pool structure schematic diagram at 2G/3G/WiFi ends.
Fig. 5 is shown as high in the resource regulating method based on multistage-mapping under the high-speed mobile environment of the invention of the present invention
Fast mobile relay gateway architecture schematic diagram.
Fig. 6 is shown as the resource regulating method two level based on multistage-mapping under the high-speed mobile environment of the invention of the present invention
Scheduling flow schematic diagram.
Fig. 7 is shown as under the high-speed mobile environment of the invention of the present invention in the resource regulating method based on multistage-mapping
The queue cache pool structural representation at TD-LTE ends.
Fig. 8 is shown as under the high-speed mobile environment of the present invention service queue money in the resource regulating method based on multistage-mapping
Schematic diagram is distributed in source.
Fig. 9 be shown as under the high-speed mobile environment of the present invention in the resource regulating method based on multistage-mapping it is jamproof from
The implementation process schematic diagram of adaline vehicle mounted antenna transmission mechanism.
Figure 10 is shown as under the high-speed mobile environment of the present invention two row high speed in the resource regulating method based on multistage-mapping
Train carriage return schematic diagram of a scenario.
Component label instructions
1 bullet train system；
2 ground systems；
11 user terminals；
12 high-speed mobile Tandem Gateways；
13 locomotive antennas；
21 core nets；
22 evolved nodes；
121 2G micro-base stations；
122 3G micro-base stations；
123 WiFi micro-base stations；
221 RRU；
S1 ~ Sn steps.
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Refer to accompanying drawing.It should be noted that only explanation is of the invention in a schematic way for the diagram provided in the present embodiment
Basic conception, then in schema only display with relevant component in the present invention rather than according to component count during actual implement, shape
Shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during its actual implementation, and its component cloth
Office's kenel may also be increasingly complex.
With reference to embodiment and accompanying drawing, the present invention is described in detail.
For the present invention by taking bullet train as an example, the heterogeneous network type considered has 2G/3G/WiFi and TD-LTE, such as Fig. 1
Shown TD-LTE high-speed mobile resource management architecture, include bullet train system 1 in the high-speed mobile resource management architecture
With ground system 2, the bullet train system 1 includes user terminal 11 and high-speed mobile Tandem Gateway 12 and locomotive antenna
13, high-speed mobile Tandem Gateway 12 includes 2G micro-base stations 121,3G micro-base stations 122 and WiFi micro-base stations 123.The ground system
System 2 includes core net（MME/S-GW）21 and evolved node 22（eNB）, evolved node 22 includes multiple RRU221, core
Net 21 is connected with evolved node 22 by S1 interfaces, is connected between evolved node 22 by X2 interface, evolved node 22
With radio frequency remoto module（RRU, Radio Remote Unit）Connected between 221 by S1 interfaces.Bullet train system 1 and ground
Plane system 2 is communicated to connect by locomotive antenna 13.
In order to meet communicating requirement of the bullet train passenger for data communication and digital entertainment, in speed train cars
Various wireless communication technology mechanism is supported, compartment is covered by mobile relay.Bullet train user's communication, when sending short messages and surfing the Net
Mass data business can be produced, caused type of service is also varied, the class that has powerful connections business, video class business, voice class
Business, interaction service etc., corresponding QoS grades are also corresponding different.To meet that user's in speed train cars is each
Class business demand, it is required to need computational chart with a width of 46M, bullet train portfolio as shown in table 1, and be available in practical application point
The bandwidth matched somebody with somebody but only has 20M, does not reach the demand of user much.Therefore, in the system two-stage resource relayed based on high-speed mobile
In scheduling and assignment problem, when congestion occurs for user resources deficiency, network, the present invention is reasonable by using multi-stage scheduling mechanism
TD-LTE Internet resources are dispatched on ground, make high-grade business preferentially by and taking into account the fairness of inferior grade business, being inhomogeneity
The business of type provides different service quality guarantees.
The high-speed railway traffic needs computational chart of table 1
In view of the network insertion scene on bullet train, user terminal is accessed and completed by 2G/3G/WiFi on compartment, high
Fast train uses TD-LTE standards to ground base station, and it is whole by optical cable and TD-LTE often to save the wireless access point AP placed in compartment
End is connected, and often mass data stream caused by section compartment, which is all converged on TD-LTE, is transmitted, and has aggravated TD-LTE burden, has made
The resource available into network does not reach the demand of user much.The present invention uses graded dispatching, in base station and relay
And resource impact, bandwidth request and the distribution of two-stage independence are carried out on relay and user terminal, use base in the first order
In switching preferential admission control mechanism, the time delay to be scheduled such as virtual resource mapping mechanism, control business, the clothes of business are improved
Business quality；Railway signal resource preemption mechanism is introduced in the second level, ensures the resource that relay can grant base station
Each mobile terminal is assigned in time, reduces the unnecessary wasting of resources；In locomotive antenna to ground base station transmission process, use
Jamproof adaptive antenna transmission, avoids the interference between same two antennas of train；For the special screne of train meeting, carry
Go out resource reservation mechanism during meeting.
Embodiment one
The present invention considers symmetrical service type, i.e., industry has same Qos demands up and down, and the present embodiment is with user
Exemplified by industry business, there is provided the resource regulating method based on multistage-mapping under a kind of high-speed mobile environment.It is as shown in Fig. 2 specific real
The process of applying includes：
S1, schedule level one is completed on first order link；Schedule level one uses 2G/3G/WiFi at 2G/3G/WiFi ends
The buffer queue pond at end, the buffer queue pond at the 2G/3G/WiFi ends are used to be buffered in what is transmitted on the first order link
2G/3G/WiFi business datums, the data after caching are then subjected to QCI virtual resource mappings, the 2G/3G/ that will be obtained after mapping
After WiFi business datums carry out first time priority ranking, 2G/3G/WiFi business datums are finally converted into TD-LTE numbers
According to being used at the 2G/3G/WiFi ends of first order link please based on the preferential new connection of Call Admission Control mechanism judgement of switching
The access asked, using buffer queue pond 2G/3G/WiFi business datums are cached, using QCI virtual resource mapping mechanisms pair
The 2G/3G/WiFi business datums of first order link carry out first time priority ranking, and conversion 2G/3G/WiFi and TD-LTE
Data format complete 2G/3G/WiFi schedule level one, improve the service quality of business.Wherein, the first order link is
Refer to the link between user terminal and high-speed mobile Tandem Gateway.It is micro- that the high-speed mobile Tandem Gateway includes 2G micro-base stations, 3G
Base station and WiFi micro-base stations.As shown in figure 3, specific dispatching method includes：
S11, the 2G/3G/WiFi ends in the high-speed mobile Tandem Gateway are used based on the preferential call acceptance of switching
Controlling mechanism；At 2G/3G/WiFi ends, the Call Admission Control mechanism is used to determine whether a new connection request
It is linked into network.In the case of system resource deficiency, if accessing user without restriction, which may result in oneself, connection
Service quality decline.But system is wanted to make full use of wireless network resource, as much as possible user must be just linked into
In network.Under normal circumstances, in order to access new user, business degradation can be carried out to the user that some have been connected.Described in introducing
Call Admission Control can meet user access network as much as possible as far as possible and the customer service connected does not degrade this two side
The requirement in face, finds equalization point therebetween.
The type of service carried in each compartment includes voice, video, high-speed data, game on line etc., and they have not
Same working frequency range and priority.When user initiates connection request, on the one hand, high-priority service is gathered around than low priority traffice
There are more access rights, preferentially meet the QoS needs of high-priority service.On the other hand, from the perspective of user, due to
Family is walked about between different compartments, causes business of the user in connection procedure to switch between different micro-base stations.And
It is forced forced interruption when being switched in connection procedure and is blocked than initiating new connection and more makes us being difficult to endure, so is considering
Call Admission Control（CAC）When, priority that not only will be between consideration business is also contemplated that between switching user and new user
Priority.The switching user Bi Xin user that same line of business can be given under normal circumstances possesses higher priority, to improve user
Satisfaction.
, only need to be according to respective when service call be present because 2G/3G/WiFi business datums have respective priority in itself
Priority accessed, ensure high-priority service is successfully accessed rate.2G/3G/WiFi micro-base stations in each compartment, estimation
The portfolio of mobile subscriber in compartment, and it is made prediction when its is movable, it is mobile handoff user to prompt next section compartment
The bandwidth resources of a part are reserved, while allow new calling to access with certain probability, the size of probability is believed dependent on idle
The quantity in road.It is based on the expression formula for switching preferential Call Admission Control mechanism：
Wherein, NiRepresent the number of resource blocks that i-th of mobile handoff user reserves, pjRepresent that the access of j-th of new user is general
Rate, NnewjRepresent that j-th of new user accesses the number of resource blocks needed, NtotalAll number of resource blocks are represented, k represents reserved shifting
Dynamic switching total number of users, m represent the sum of new user.
To sum up, switching preferential Call Admission Control deterministic process is, if the call access control judgment formula meet with
Upper formula, then it is judged as allowing a new connection request to be linked into network, conversely, being then judged as not allowing.
S12, the buffer queue pond at 2G/3G/WiFi ends is used in the high-speed mobile Tandem Gateway；
The 2G/3G/WiFi types of service of user cover conversation class speech business, the speech business of non-session class, conversation class
Video traffic（Live video stream）, non-session class video traffic（Buffered video stream）, video（Buffer stream）, real-time game, interaction
Formula is played and the business based on TCP, and TCP traffic includes WWW, E-mail, chat, FTP, P2P file-sharing etc..Bullet train
2G/3G/WiFi and IP video traffics data caused by user in compartment are respectively enterd in movement according to their business
After the corresponding queue in gateway buffers pond.
There is different demands for the priority of 2G/3G/WiFi business datums, delay requirement and SINR etc., it is impossible to
Fully according to the FIFO of data（FIFO, First In First Out）Criterion transmits data, therefore, in high-speed mobile
After the buffer queue pond that 2G/3G/WiFi ends are used in gateway, the buffer queue pond is as shown in Figure 4.According to 2G/3G/WiFi and
Buffer queue pond is divided into corresponding queue described in the different business of IP videos, after a packet reaches mobile relay gateway
Then enter in corresponding service queue and cached.Team's head of each queue is updated periodically every queue ginseng of the queue
Number, and the queue parameter is reported to high-speed mobile Tandem Gateway.Wherein, the queue parameter includes queue team leader, data
Packet delay requirement, packet SINR and bursts dropping ratio etc.,
S13, QCI virtual resource mapping mechanisms are established between 2G/3G/WiFi ends and TD-LTE ends.
The QCI virtual resources mapping mechanism refers to that 2G/3G/WiFi business datums are directed to qos requirement, according to TD-LTE ends
2G/3G/WiFi business datums are carried out many-one mapping by QCI attributes, and the first second priority is carried out to the data on first order link
Level sequence, TD-LTE ends QCI attributes as shown in table 2.Mobile relay gateway preserves queue parameter at 2G/3G/WiFi ends to virtual
Resource mapping table, the virtual resource mapping table is as shown in table 3, and the queue parameter includes queue team leader QI, k, queue time delay will
Seek λI, k, packet SINR, bursts dropping ratio δi,kDeng.
Table 2：TD-LTE ends QCI attributes
Table 3：The virtual resource mapping table at 2G/3G/WiFi ends
| 2G/3G/WiFi business | Specific service queue | Queue team leader | Delay requirement | SINR | Bursts dropping ratio | QCI grades |
For the qos requirement of data, because the channel in first order link between user terminal and mobile relay gateway passes
The characteristic of channel of defeated geo-stationary, before 2G/3G/WiFi business datums complete the mapping of QCI virtual resources, add Signal to Interference plus Noise Ratio
The factor (SINR, Signal to Interference plus Noise Ratio).When SINR numerical value is higher, show current
The transmission quality of data is better, and data are more complete, then the probability that the data can be transmitted in the link of the second level can be higher.For
The preferable high priority data transmission of quality, improves TD-LTE ends bandwidth throughput, the profit of lifting system resource in first order link
With rate.In each TTI, mobile relay gateway according to the information extraction 2G/3G/WiFi data in virtual resource mapping table, and
Convert the data into TD-LTE data.
Introducing QCI priority is joined during virtual resource mapping mechanism is established between 2G/3G/WiFi ends and TD-LTE ends
It is several that priority ranking is carried out to 2G/3G/WiFi business datums, i.e., using Q factorWherein, QQCI_priority
For the QCI priority in QCI attributes.To further enhance weight of the Q factor in schedule level one judgement, by the Q of exponential form
The factor is introduced into scheduling, and exponential form can ensure that Q factor is the nonnegative function of monotone decreasing.Work as QQCI_priorityWhen bigger, table
Show that the QCI priority of business is lower, then the result of Q factor is smaller, and influence when mapping the business is smaller.So one
Determine to control influence of the QCI priority to change data form in degree.
Therefore, business i queues k is in the expression formula of the dispatching algorithm of first order link：
Wherein, Pi,kPriority of the expression business i queues k in first order link；δi,kExpression business i queues k packet loss,
δi,k∈(0,1)；QI, k, QCI_prioriExpression business i queues k priority；SINRi,kI queues k is in first order 2G/ for expression business
The data transfer integrity degree at 3G/WiFi ends；λi,k(t) represent business i queues k in moment t head of the queue Packet Delay information, λi,k
The maximum delay that expression business i queues k can tolerate；Qi,k(t) represent business i queues k in moment t queue length, Qi,kTable
Show business i queues k maximum queue length.
S14, by the 2G/3G/WiFi business datums of extraction in the mobile relay gateway, by own priority order,
Be converted into TD-LTE data, i.e., 2G/3G/WiFi business datums through QCI virtual resources map and first time priority ranking after,
At high-speed mobile Tandem Gateway, according to its own original priority orders, TD-LTE data are converted into.
After producing 2G/3G/WiFi business datums, by being relayed to the 2G/3G/ up to high-speed mobile Tandem Gateway in compartment
WiFi ends, and waited according to the corresponding queue being sorted into the mac layer of different business.During wait, 2G/
Data SINR, data delay requirement, data packetloss rate and the QCI grades of the first queue of 3G/WiFi service queues team are reported to
Mobile relay gateway, while queue team leader is reported to mobile relay gateway by individual queue tail of the queue.Mobile relay gateway is receiving
To after the queue parameter of each queue, update and preserve into virtual map table.When each TTI starts, mobile relay net
The application layer conversion of pass acts on behalf of queue parameter and Q factor in virtual map table, is extracted in 2G/3G/WiFi ends MAC layer
Data in data queue, TD-LTE forms are converted into, and among service queue corresponding to entrance.The knot of high-speed mobile Tandem Gateway
As shown in figure 5, the mobile relay gateway includes 2G/3G/WiFi and TD-LTE, the 2G/3G/WiFi and TD-LTE divide structure
Bao Kuo not application layer, routing layer, MAC layer and physical layer.
Specifically Data Format Transform process is：The 2G/3G/WiFi terminations of high-speed mobile Tandem Gateway receive business datum,
Application layer conversion agency, change data form, after conversion are completed a business transaction in normal processing of the data Jing Guo physical layer, MAC layer, LL layers
The corresponding agency at TD-LTE ends is given, is determined to give routing layer processing upwards by acting on behalf of accordingly or is delivered to directly down
LL layers.Treated packet is sent from the physical layer at TD-LTE ends, is sent TD-LTE base stations to, is completed by 2G/3G/WiFi
Transmitted to the packet of TD-LTE base stations.Reverse transfer is as the same.
S2, second-level dispatching is completed on the link of the second level；Second-level dispatching is to use the queue at TD-LTE ends at TD-LTE ends
Buffer pool is buffered in the TD-LTE data transmitted on the second level link, and the data are entered according to TD-LTE ends QCI attributes
Second of priority ranking of row, and priority highest data are put in the first place transmission, carry out resource and seize, i.e., in second-level dispatching
Using the TD-LTE data of the queue cache pool buffering conversion at TD-LTE ends, railway signal resource preemption mechanism is introduced, ensures to move
The resource that base station has been granted can be assigned to each mobile terminal in time by dynamic Tandem Gateway；Ground base station is sent out in locomotive antenna
Journey is passed through, is transmitted using jamproof adaptive antenna, avoids interfering with each other between two antennas in bullet train；Described second
Level link refers to the link between the high-speed mobile Tandem Gateway and ground base station.Method such as Fig. 6 institutes of specific second-level dispatching
Show, including：
S21, buffer queue pond is used at TD-LTE ends；
The packet at 2G/3G/WiFi ends passes through after translation proxy in high-speed mobile Tandem Gateway, is converted into TD-LTE numbers
According to after data reach high-speed mobile Tandem Gateway, the queue according to corresponding to entering QCI attribute ratings arrangement in TD-LTE ends is entered
Row caching, and wait resource block to be allocated to be transmitted data, TD-LTE ends buffer queue pool structure is as shown in Figure 7.
S22, sorted using the resource preemption mechanism of railway signal, and according to queue priority；It is firstly added railway letter
Number indicatorWherein, I0=1, Ii(t) whether expression business i is railway signal in t.Work as Ii(t)=0
When, indicator result is 1, and it is not railway signal to represent the business, is general service data；Work as Ii(t) when=1, instruction because
Sub- result is infinity, and it is railway signal to represent the business, highest priority, transmission of putting in the first place, carries out resource and seizes.The plan
Slightly prioritised transmission ensures information exchange necessary to bullet train system normal operation, improves the actual operation of system.
Then, for the delay requirement of data, inside data, join delay the factorWherein, λiFor business i when
Prolong requirement, λi(t) it is time delays of the current business i at current time,Influence of the time delay to priority is may be considered, is dispatched
Delay is bigger, and priority will be higher, and so, overtime user's can is scheduled before scheduling delay.Work as λi=λi
(t) when, the priority of time domain grouping scheduling is 1, represents user i in current business rank, time domain grouping dispatching priority is most
It is high.The strategy it is higher to delay requirement or close to delay requirement high priority data transmission, ensure to transmit in the range of its time delay.
Then, locomotive antenna determines that the data for sending which mobile relay gateway in compartment can be carried out at priority
Reason, introduce compartment priority parameters QI, coach_priority∈ (0,1), the high compartment Q of priorityI, coach_priorityNumerical value is relatively
Greatly.When there is high priority compartment, for example, when the data of the Tandem Gateway node in the compartment of first block reach antenna, preferentially to send out
Send.
In view of repeat request be present, locomotive day bundle of lines one retransmits data and is put in behind first biography data, so
Retransmit to add in data and retransmit mark HHARQ。
Finally, in each service queue, secondary priority ranking is carried out.If there are the data of transmission railway signal, need to be placed on
First of all queues, forward immediately, can so ensure the normal operation of bullet train " heartbeat ", and this ensure that
The prioritised transmission of high-priority service, the efficiency of transmission data is improved, ensure that Consumer's Experience, practicality enhancing.
To sum up, business i is in the dispatching algorithm expression formula of second level link：
Wherein, i*Priority of the expression business i in second level link；I0=1, Ii(t) represent business i t whether be
Railway signal, λiFor business i delay requirement, λi(t) for current business i in the time delay at current time, QI, QCI-priorityRepresent
Business i priority, QI, coach-priorityThe compartment priority parameters of business i in train are represented, retransmit mark HHARQRepresent the number
According to whether be retransmit data.
S23, estimate channel resource block, that is, estimate the resource block number to be transmitted；Because bullet train moves speed per hour
For 350km/h when, the features such as Doppler shift is big, train body loss is big be present, the channel quality meeting in each transmission time slot
Change, the quality of resource block decreases, and voice communication quality and message transmission rate can correspondingly decrease.Institute
So that channel resource block pre-estimation need to be used, according to resource block total amount workable for the channel quality estimation system calculated in this TTI.
The feedback of channel quality information, which calculates, to be included：
(a) locomotive antenna measurement SINR；
(b) SINR is corrected according to certain link circuit self-adapting algorithm；
(c) SINR value is converted into discrete CQI value and CQI value is reported into ground base station；Wherein, CQI value is SINR
Function, i.e.,
CQIn=f (SINRm+SINRerror+SINRΔ)
Wherein, CQInRepresent the channel quality level of resource block in the TTI；SINRmIt is the SINR of measurement, in TD-LTE systems
In system, UE is obtained by measuring public reference signal (CRS);SINRerrorIt is the stochastic variable of a Gaussian Profile, reflects
The error of measurement;SINRΔIt is the calibration value that link circuit self-adapting algorithm obtains, it can overcome the disadvantages that the ripple that the quick change of channel quality comes
It is dynamic.
The resource block total amount that locomotive antenna and the channel information of ground base station measurement estimate, because scheduling of resource is first
Consider the demand of user, that is to say, that how many data is each business of all users will transmit, more than maximum transmitted ability
Or the resource allocation of remaining data amount is nonsensical.So individual queue packet is also needed to calculate in this TTI in highest channel
Quality indicates（CQI, Channel Quality Indicator）, minimum send data volume and minimum transmission rate request situation
Under the minimum virtual resource blocks that estimate（VRB, Virtual Resource Block）Occupancy,
Nmin(VRB)=f (TBSi,min,ri,min,CQImax)
And the maximum VRB occupancies that minimum CQI and maximum transmission rate requirement estimate
Nmax(VRB)=f (TBSi,max,ri,max,CQImin),
Wherein, Nmin(VRB) minimum virtual resource blocks occupancy, N are representedmax(VRB) represent that maximum virtual resource blocks take
Amount, TBSI, minThe minimum transmission data volume that expression business i estimates at the TTI moment, by the real time business transmitted（Guaranteed
Bit Rate, GBR）Demand determine, TBSI, maxThe maximum transmission data volume that expression business i estimates at the TTI moment, by ground
Base station end sends the limit decision of caching, rI, maxRepresent maximum transmission rate, rI, minRepresent minimum transmission rate, CQIminRepresent
Minimum CQI value, CQImaxMaximum CQI value is represented, CQI value is measured respectively by locomotive antenna and ground base station, represents wireless channel matter
Amount, ground base station selection Adaptive Modulation and Coding mode（MCS, Modulation and Coding Scheme）.
S24, channel resource block is distributed, i.e., cis-position is TD-LTE data distribution resource blocks from high to low according to priority；
The individual queue sequence finally determined according to business and packet minimum VRB occupancies, priority from k queue
The packet of k1 queue is sequentially allocated resource block before highest, and the packet of remaining k-k1 queue waits next TTI sequences
Send.Still have residue if resource block after all k queue assignments, then by packet maximum VRB occupancies and priority from
High to Low order is individual queue allocation of packets resource block.It is over if the high business i of priority has been serviced, will continues to take
The low business i+1 of priority of being engaged in.The process will continue until effective bandwidth exhausts or remaining business also being serviced.Use
The strategy can guarantee that the Business Stream of the low priority in the case where business load is very heavy can still obtain transmitting required minimum
Bandwidth.
During two-stage scheduling of resource, being used for the different business queue of second level TD-LTE ends more really has
Queue queuing model is limited, as shown in figure 8, the service queue of every kind of business is probably different in queue length at different moments,
So just need to consider queue length information when scheduling.Head pointer * Ph are designed in the team's head and tail of the queue of queue and tail refers to
Pin * Pt, if * Ph=* Pt, then it represents that the queue empty, the channel condition where business again well can not be again to the channel point
Allocating channel resource is used to transmit data.
In the multiple business that bullet train broadband wireless access to be carried, clear data business, such as surf the web, electricity
Sub- mail etc. is because insensitive without being influenceed by this channel capacity fluctuation to time delay and shake, but real time business, for example,
Therefore the QoS of the business such as Voice over IP, Voice over IP, visual telephone can deteriorate.If data rate is too low and temporary
Shi Wufa transmitting real-time services, passenger will be appreciated by the pause or shake of voice or video.So distribution when it is contemplated that if
Railway signal, then maximum VRB occupancies distribution resource block should be used, uses maximum transmission rate；If 2G/3G speech businesses,
Then using minimum VRB occupancies distribution resource block, GBR transmission rates are used；If other conventional GBR traffics, then using minimum
VRB occupancies and GBR transmission rates；If other conventional Non-GBR business, then using minimum VRB occupancies and minimum transmission
Speed.This just ensure that service quality of the high-priority data on the link of the second level, and ensure for the user of low priority
Fairness, ensure that the time delay of business is reliable.
S25, the resource block distributed using jamproof adaptive locomotive antenna transmission；
The anti-interference adaptive locomotive antenna of bullet train mounted inside two, this two anti-interference adaptive locomotive antennas point
The headstock and the tailstock of train are not assemblied in.The TD-LTE data for distributing resource block are reached ground base station by the antenna.
In bullet train running, the locomotive antenna for selecting channel quality good carries out data transmission, the locomotive antenna
Channel quality determined by the instantaneous received power of the locomotive antenna.When the instantaneous received power of the locomotive antenna of headstock is less than in advance
If threshold value, then the locomotive antenna transmission data of the tailstock are automatically switched to；When the instantaneous received power of the locomotive antenna of the tailstock is less than
Predetermined threshold value, then the locomotive antenna scanning channel for opening headstock accesses next RRU in advance, then is carried out by the locomotive antenna of headstock
Data transfer, the implementation process using jamproof adaptive locomotive antenna transmission mechanism are as shown in Figure 9.
S26, during meeting, using resource reservation mechanism；
In bullet train running, when a row bullet train is run, the locomotive antenna of bullet train exclusively enjoys whole
The bandwidth used, it can so ensure the multiple business demand of user in train.But run into meeting when bullet train is run
Can be that two row bullet trains provide by the ground base station when situation, i.e. two row bullet trains access same ground base station simultaneously
Source is reserved, and meeting scene is as shown in Figure 10.
When ground base station discovery has two row bullet trains while accesses or will successively access, then original bandwidth
By 1:1 point is two sub- bandwidth, passes through the wide locomotive antenna for sending instructions to two row bullet trains respectively of the two subbands.Work as institute
State locomotive antenna and receive instruction, that is, notify bandwidth to reduce, afterwards, the locomotive antenna passes according to the band preference after reduction
" heartbeat " signaling of defeated priority highest, delay requirement highest data and bullet train operation, caches other priority
The not high data of relatively low and delay requirement, bullet train meeting is waited to be transmitted again after terminating.
Tracked because ground base station updates to locomotive antenna, accordingly even when two trains are in different ground base stations
Under RRU, also train information can be exchanged when that will switch, predict two trains in advance in the access of same ground base station, do
Resource allocation during good meeting.It can ensure normal operation and high priority of the bullet train in the case of meeting using the strategy
Emergency data smooth transmission, the availability of whole system can be improved.
Resource regulating method based on multistage-mapping under a kind of high-speed mobile environment provided by the invention, methods described cause
Under the premise of quality of service is ensured, the entire throughput of vehicle-mounted broadband wireless access system is improved as far as possible and meets respectively to use between system
Fairness between the terminal of family, improve the utilization rate of limited bandwidth resource.
Embodiment two
The present embodiment provides the resource regulating method based on multistage-mapping, the present embodiment and reality under a kind of high-speed mobile environment
The difference for applying example one is the resource reservation mechanism that two row bullet trains use in meeting, i.e. train is carrying out information transfer
Meanwhile report the size of the portfolio of respective car.When ground base station find have two row bullet trains will converge car when, according to two row
The demand of train traffic amount, bandwidth resources are adaptively distributed, and notify locomotive antenna.
The resource regulating method based on multistage-mapping is applied to remote under a kind of high-speed mobile environment of the present invention
Personnel's base station area or bullet train in area, in that region because optical cable can not be laid so that wireless relay mode
It can access on a large scale.The present invention is made by the use of TD-LTE technologies as long range transmission channel using 2G/3G/WiFi technologies
For short distance user's access technology, used in schedule level one based on the preferential admission control mechanism of switching, virtual resource mapping machine
The time delay to be scheduled such as system, control business, improve the service quality of business；Railway signal resource is introduced in second-level dispatching to seize
Mechanism, it ensure that the resource that base station has been granted can be assigned on each mobile terminal by relay in time, reduce not
The necessary wasting of resources；Data are transmitted using jamproof adaptive antenna in locomotive antenna is to ground base station transmission process,
The interference between the same antenna of train two is avoided, and resource reservation mechanism is used in bullet train meeting；The invention enables
Under the premise of ensureing quality of service, the entire throughput of vehicle-mounted broadband wireless access system is improved as far as possible and meets each user between system
Fairness between terminal, improve the utilization rate of limited bandwidth resource.
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. the resource regulating method based on multistage-mapping under a kind of high-speed mobile environment, it is characterised in that described to be reflected based on multistage
The resource regulating method penetrated includes：
S1, schedule level one is completed on first order link；Schedule level one is using 2G/3G/WiFi ends at 2G/3G/WiFi ends
Buffer queue pond；The buffer queue pond at the 2G/3G/WiFi ends is used to be buffered in the 2G/3G/ transmitted on the first order link
WiFi business datums, the data after caching are then subjected to QCI virtual resource mappings, by the 2G/3G/WiFi industry of acquisition after mapping
Data of being engaged in carry out first time priority ranking, and 2G/3G/WiFi business datums finally are converted into TD-LTE data；Wherein, it is described
First order link refers to the link between user terminal and high-speed mobile Tandem Gateway；The step S1 includes：
Used at 2G/3G/WiFi ends based on preferential Call Admission Control mechanism is switched, the Call Admission Control mechanism is used for
Determine whether that a new connection is linked into network；The expression formula of the Call Admission Control mechanism is：
<mrow>
<munderover>
<mo>&Sigma;</mo>
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<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>k</mi>
</munderover>
<msub>
<mi>N</mi>
<mi>i</mi>
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<msub>
<mi>N</mi>
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<mi>n</mi>
<mi>e</mi>
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<mi>j</mi>
</mrow>
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<mo>&le;</mo>
<msub>
<mi>N</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>t</mi>
<mi>a</mi>
<mi>l</mi>
</mrow>
</msub>
</mrow>
Wherein, NiIt is expressed as the number of resource blocks that i-th of mobile handoff user reserves, pjThe access probability of j-th of new user is represented,
NnewjRepresent that j-th of new user accesses the number of resource blocks needed, NtotalAll number of resource blocks are represented, k represents reserved movement
Switch total number of users, m represents the sum of new user；
S2, second-level dispatching is completed on the link of the second level；Second-level dispatching is to use the buffer queue at TD-LTE ends at TD-LTE ends
Pond；The buffer queue pond at the TD-LTE ends is used to be buffered in the TD-LTE data transmitted on the second level link, Ran Hougen
Second of priority ranking is carried out to the TD-LTE data according to TD-LTE ends QCI attributes, and the data of highest priority are put
Transmitted in first place；The second level link refers to the link between the high-speed mobile Tandem Gateway and ground base station.
2. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S1：Before 2G/3G/WiFi business datums complete the mapping of QCI virtual resources, addition SINR, and
QCI priority parameters, i.e. Q factor are introduced in QCI virtual resource mapping mechanisms；Wherein, business i queues k is in first order link
Dispatching algorithm expression formula is：
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<mi>P</mi>
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<mi>exp</mi>
<mrow>
<mo>(</mo>
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<mi>Q</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>k</mi>
<mo>,</mo>
<msub>
<mi>QCI</mi>
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<mi>P</mi>
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<mi>I</mi>
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<mi>SINR</mi>
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Wherein, Pi,kPriority of the expression business i queues k in first order link；δi,kExpression business i queues k packet loss,
δi,k∈(0,1)；Qi,k,QCI_priorityExpression business i queues k priority；SINRi,kK is in the first order for expression business i queues
The data transfer integrity degree at 2G/3G/WiFi ends；λi,k(t) head of the queue Packet Delay information of the business i queues k in moment t is represented,
λi,kThe maximum delay that expression business i queues k can tolerate；Qi,k(t) represent business i queues k in moment t queue length, Qi,k
Expression business i queues k maximum queue length.
3. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S2：Estimate channel resource block, that is, estimate the resource block number to be transmitted.
4. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S2：Channel resource block is distributed, i.e., is provided in descending order for TD-LTE data distributions according to priority
Source block；The distribution resource block adds the railway signal factor, i.e., when there is railway signal to occur, carries out resource immediately and seize, put
First of all queues, forward immediately；Wherein, business i is in the dispatching algorithm expression formula of second level link：
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<mi>QCI</mi>
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<msub>
<mi>H</mi>
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<mi>H</mi>
<mi>A</mi>
<mi>R</mi>
<mi>Q</mi>
</mrow>
</msub>
<mo>}</mo>
</mrow>
Wherein, i* represents priority of the business i on the link of the second level；I0=1, Ii(t) whether expression business i is iron in t
Road signal；λiFor business i delay requirement, λi(t) it is time delays of the current business i at current time；Qi,QCI_priorityRepresent industry
Business i QCI grades；Qi,coach_priorityRepresent the compartment priority of business i in train；Retransmit mark HHARQRepresenting the data is
No is to retransmit data.
5. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S2：The resource block distributed using anti-interference adaptive locomotive antenna transmission；It is described anti-interference adaptive
Locomotive antenna is answered to be respectively assembled at the headstock and the tailstock of train；The anti-interference adaptive locomotive antenna has instantaneous received power
And predetermined threshold value, when the instantaneous power of the locomotive antenna of headstock is less than predetermined threshold value, then automatically switch to the locomotive day of the tailstock
Line transmits data；When the instantaneous received power of the locomotive antenna of the tailstock is less than predetermined threshold value, then the locomotive antenna of headstock is opened
Scanning channel accesses next Remote Radio Unit of ground base station, then the locomotive antenna transmission resource block for passing through headstock in advance.
6. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S2：Using resource reservation mechanism, the resource reservation mechanism refers to that the locomotive antenna of train is transmitting
High ferro signal simultaneously, reports the portfolio size of this car to ground base station.
7. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 5, it is characterised in that
Also include in the step S2：Using resource reservation mechanism, the resource reservation mechanism refers to ground base station according to user terminal
Bandwidth resources adaptively are distributed for train to the demand of business datum, and notify the anti-interference adaptive locomotive antenna.
8. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
Also include in the step S2：Using resource reservation mechanism, the resource reservation mechanism refers to that bandwidth is divided into 1 ︰ 1 by ground base station
Two sub- bandwidth, and notify the anti-interference adaptive locomotive antenna.
9. the resource regulating method based on multistage-mapping under high-speed mobile environment according to claim 1, it is characterised in that
The 2G/3G/WiFi ends include 2G micro-base stations, 3G micro-base stations and WiFi micro-base stations.
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| US9426786B2 (en) * | 2014-05-22 | 2016-08-23 | Sony Corporation | Sharing transmission intentions in wireless networks for CSMA optimization |
| CN104580340A (en) * | 2014-07-11 | 2015-04-29 | 深圳市金溢科技股份有限公司 | Data updating system and data updating method thereof, as well as mobile multimedia relay equipment |
| CN106714224B (en) * | 2015-11-16 | 2020-01-17 | 中国移动通信集团公司 | Rate prediction method, device and system |
| US10368291B2 (en) * | 2016-11-30 | 2019-07-30 | GM Global Technology Operations LLC | Controlling use of vehicular Wi-Fi hotspots by a handheld wireless device |
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