CN104812098B - Base station protocol processing method and system in centralized base station framework - Google Patents
Base station protocol processing method and system in centralized base station framework Download PDFInfo
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- CN104812098B CN104812098B CN201410036322.1A CN201410036322A CN104812098B CN 104812098 B CN104812098 B CN 104812098B CN 201410036322 A CN201410036322 A CN 201410036322A CN 104812098 B CN104812098 B CN 104812098B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
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Abstract
The present invention provides base station protocol processing method and system under centralized base station framework.First according to all virtual base station protocol processes entities in same processor ascending load and down load in a period of sub-frame is mapped to, determine that virtual base station protocol processes entity carries out downlink data processing and needs number of sub frames in advance.Then, for downlink subframe, corresponding number of sub frames is shifted to an earlier date to handle downlink data corresponding with the downlink subframe.This method according to ascending load account for total load ratio flexibly change need to be in advance when base station protocol under centralized base station framework handles downlink data number of sub frames, process resource utilization rate can be maximized on the premise of guarantee agreement is handled in real time；And control and management are convenient, expense is small.
Description
Technical field
The invention belongs to TDD (Time Division in moving communicating field, more particularly to centralized base station framework
Duplexing, time division duplex) base station protocol treatment technology under pattern.
Background technology
As the development of wireless communication technique and terminal, the high speed of service traffics increase, traditional network architectural framework
The problem of high investment, height consumption and low resource utilization, progressively embodies.For the problem, there is centralized base station frame
The concept of structure, for example, the system architecture of cloud type access net C-RAN, main to include by remote radio frequency unit（RRU）With antenna
The distributed wireless networks of composition, connect high bandwidth, the optical transport network of low latency of remote radio frequency unit, by general
Manage the centralized Base-Band Processing pond three parts of device and real-time virtual technology composition.The Base-Band Processing pond of centralization is established in high property
On energy general processor, base band signal process is realized by software and radio technique.Under this centralized base station framework, base
It is no longer physical entity independent one by one to stand, but a certain section or several sections of abstract process resources in baseband pool, can be according to reality
The business load on border, dynamically distribute to corresponding cell by a certain part resource of baseband pool so that be distributed in logic
The physical resource equipment that base station processing can be disposed flexibly using centralization, so as to be divided on demand according to each load of base station
Match somebody with somebody, improve resource utilization.Relevant technical solution is managed for process resource under existing centralized base station framework, more
Pay close attention to centralized resources global tissue, and the resource allocation of Base-Band Processing and dynamic adjust, and for Base-Band Processing on
Upper-layer protocol handle tissue under centralized base station framework and the research of the method for operation is relatively fewer.
However, upper-layer protocol processing and physical layer Base-Band Processing have very big otherness.The main bag of upper-layer protocol processing
Include each user access of base station, each customer service type management, the processing of the uplink and downlink real data of each subframe of each user etc..
Physical layer Base-Band Processing is mainly some extensive continuity serial process, and the change of customer service type is to base band data processing
Process does not have substantial influence, and Base-Band Processing is usually carried out in dedicated baseband processor to improve treatment effeciency；And assisted on upper strata
In view processing, there is very big correlation between multiple processing procedures of each layer of agreement, and need more complicated multi-process branch
Hold, the change of customer service type can produce a very large impact agreement process and processing procedure, and protocol processes are more suitable for
Handled in general processor.Due to these othernesses, some are applied to the resource allocation methods and base station base of Base-Band Processing
Tape handling centralization method for organizing, can not be applicable in upper-layer protocol processing.It is related to protocol processes resource management in the prior art
Content uses strategy mainly for the process resource optimization under single base stations and multiuser, without being related in centralized base station framework
More base station protocols processing of lower appearance coexists and shares the situation of physical resource equipment.Therefore, it is necessary to one kind in centralized base station
The scheme of more shared physical resources of base station protocol processing under framework.
The content of the invention
Therefore, it is an object of the invention to overcome above-mentioned prior art the defects of, there is provided under a kind of centralized base station framework
Base station protocol processing method.
The purpose of the present invention is what is be achieved through the following technical solutions：
On the one hand, the present invention provides base station protocol processing method under a kind of centralized base station framework, including：
Step 1, according to all virtual base station protocol processes entities being mapped in same processor in a period of sub-frame
Interior ascending load and down load, determine that virtual base station protocol processes entity carries out downlink data processing and needs subframe in advance
Number；
Step 2, for downlink subframe, the virtual base station protocol processes entity shifts to an earlier date corresponding number of sub frames to handle with being somebody's turn to do
The corresponding downlink data of downlink subframe.
In the above method, the step 1 may also include：
Count each virtual base station protocol processes entity being mapped in same processor uplink in a period of sub-frame
Load and down load, and
Calculate the summation of the ascending load of all virtual base station protocol processes entities on the processor and down load
Summation.
Virtual base station protocol processes entity, which carries out downlink data processing, in the above method, in the step 1 needs in advance
Number of sub frames can be according to ascending load ratio-dependent shared in total load.
In the above method, the number of sub frames for needing to shift to an earlier date can be determined by following formula：
Wherein, M, which is represented, needs number of sub frames in advance, and N represents subframe in a period of sub-frame
Number, K represent the ascending load of all virtual base station protocol processes entities on the processor in a period of sub-frame total load
Shared ratio,Represent the downward rounding in fractions omitted part.
In the above method, when ascending load and the ratio value of total load are in section [k/N, k+1/N）When interior, the needs carry
Preceding number of sub frames is N-k；Wherein N represents the number of subframe in a period of sub-frame, and k is integer, and 0≤k≤N-1.
Another aspect, the present invention provides base station protocol processing system under a kind of centralized base station framework, including：
For according to being mapped to all virtual base station protocol processes entities in same processor in a period of sub-frame
Ascending load and down load, determine that virtual base station protocol processes entity carries out downlink data processing and needs number of sub frames in advance
Device；
For for downlink subframe, the virtual base station protocol processes entity shift to an earlier date corresponding number of sub frames handle with this
The device of the corresponding downlink data of row subframe.
Another aspect, the present invention provides base station protocol processing system under a kind of centralized base station framework, including：
One or more virtual base station protocol processes entity setses, each virtual base station protocol processes entity sets include reflecting
All virtual base station protocol processes entities being mapped in same processor；
Load manager, for count each virtual base station protocol processes entity in a period of sub-frame ascending load with
Down load；
Protocol processes controller, for according to the corresponding ascending load of each virtual base station protocol processes entity sets with
Row load, determines that each virtual base station protocol processes entity carries out the number of sub frames of downlink data processing needs in advance in the set；
Wherein, the corresponding ascending load of each virtual base station protocol processes entity sets and down load are respectively the set
Ascending load summation of the interior all virtual base station protocol processes entities in a period of sub-frame and down load summation；The void
Intend base station protocol processing entities for downlink subframe, shift to an earlier date corresponding number of sub frames to handle lower line number corresponding with the downlink subframe
According to.
In said system, the protocol processes controller can be additionally used in：
It is total when the corresponding ascending load of virtual base station protocol processes entity sets on a processor and down load
During with disposal ability more than the processor, by one or more of set virtual base station protocol processes entity migration to another
In virtual base station protocol processes entity sets on one processor；And
For virtual base station protocol processes entity sets involved by the migration, count again its corresponding ascending load with
Down load, and redefine wherein each virtual base station protocol processes entity and carry out the subframe that downlink data processing needs to shift to an earlier date
Number.
In said system, when the ratio value of the corresponding ascending load of virtual base station protocol processes entity sets and total load exists
Section [k/N, k+1/N）When interior, each virtual base station protocol processes entity progress downlink data processing needs shift to an earlier date in the set
Number of sub frames be N-k；Wherein N represents the number of subframe in a period of sub-frame, and k is integer, and 0≤k≤N-1.
It is described to need number of sub frames in advance to be determined by following formula in said system：
Wherein, M, which is represented, needs number of sub frames in advance, and N represents subframe in a period of sub-frame
Number, K represent the ascending load of all virtual base station protocol processes entities on the processor in a period of sub-frame total load
Shared ratio,Represent the downward rounding in fractions omitted part.
Compared with prior art, the advantage of the invention is that：
Base station protocol processing mode under centralized base station framework is provided, by continuous downlink subframe advanced processing, and root
Change number of sub frames in advance according to ascending load ratio shared in total load, can on the premise of guarantee agreement is handled in real time,
Maximize process resource utilization rate；And control and management are convenient, expense is small.
Brief description of the drawings
Embodiments of the present invention is further illustrated referring to the drawings, wherein：
Fig. 1 is the process schematic that existing base station protocol processing method handles subframe；
Fig. 2 is the process schematic that existing base station protocol processing method handles subframe；
Fig. 3 is the process that base station protocol processing method handles subframe under the centralized base station framework according to the embodiment of the present invention
Schematic diagram；
Fig. 4 is the structure diagram of base station protocol processing system under the centralized base station framework according to the embodiment of the present invention.
Embodiment
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, and pass through below in conjunction with attached drawing specific real
Applying example, the present invention is described in more detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Under centralized base station framework, by the load in the corresponding coverage in far end radio frequency port, pass through high speed fibre
Centralized physical resource equipment is transferred to be handled.Under such centralized base station framework, base station is no longer only one by one
Vertical physical entity, but a certain section or several sections of abstract process resources in centralized base station resource pool, can be according to actual industry
Business load, a certain part resource of base station resource pond is dynamically distributed into corresponding cell so that the base being distributed in logic
Standing processing can be flexibly using the physical resource equipment of centralization placement.There may be multiple base stations in single physical equipment
Manage entity.Virtual base station can be referred to as by closing the base station processing entities that are logically present in centralized physical equipment collection（VBS）, respectively
A virtual base station can perform base station physical layer Base-Band Processing and/or upper-layer protocol processing.Base-Band Processing and protocol processes can be with
Physical equipment in identical or different type, such as protocol processes can run on general processor GPP, and Base-Band Processing is usual
Carried out on special DSP.Multithreading demand and higher interdependency due to the protocol processes of base station, it is usually logical
Carried out with the general processor under server platform.The virtual base station that hereinafter will be specific to perform upper-layer protocol processing is known as
Virtual base station protocol processes entity or referred to as base station protocol processing entities.It will be mapped to all void of a processor core in the heart
Intend base station protocol processing entities and regard a virtual base station protocol processes entity sets as（It may be simply referred to as VBS-SET）.
The application is mainly for (the Time Division Duplexing-Long of TDD-LTE under centralized base station framework
Term Evolution, time division duplex-Long Term Evolution) protocol processes method.The characteristics of TDD-LTE protocol processes is：Downlink
Frame related data preparation needs to handle subframe in actual physics layer downlink data（D subframes）Complete, just can guarantee that in D before
Downlink data after upper-layer protocol is handled when subframe starts is submitted to the operation after physical layer carries out, therefore is assisted for upper strata
View processing is, it is necessary to which one or more subframes prepare correlation procedure to carry out downlink data in advance.Existing base station is corresponding
In protocol processes, downlink subframe shifts to an earlier date the subframe start to process of fixed number, if this mode is directly applied to centralized base
Following problem can be produced under station rack structure：In order to improve process resource utilization rate, when multiple virtual base station protocol processes entities map
When some processor core, uplink relevant treatment process and downlink phase corresponding to the plurality of virtual base station protocol processes entity
Treatment progress is closed, process scheduling is carried out by operating system in the heart in the processor core, since the general-purpose operating system is usually used
Class fair scheduling strategies（As used complete Fair Scheduler in linux operating systems（CFS）It is scheduled）, uplink is related at this time
Process and downlink associated process can obtain the timeslice of equivalent, therefore downlink processing process may be due to other uplink treatment progress
The influence of participation scheduling can not handle and complete corresponding downlink data.
In TDD-LTE system, there are a variety of sub-frame configurations, under every kind of sub-frame configuration, 5 continuous subframes（5ms, per height
Frame time is 1ms）The corresponding time can be referred to a period of sub-frame.In this application with sub-frame configuration knot in TDD-LTE
It is illustrated rather than is limited exemplified by structure D, S, U, D, D, similar processing can be made to other sub-frame configuration structures.
Wherein, D represents downlink subframe, and U represents sub-frame of uplink, and S is scheduling subframe, in a period of sub-frame, there is the number of 3 D subframes
According to need carry out upper-layer protocol processing to prepare to submit to physical layer, in addition with a U subframe protocol processes in base station end
Handled after being connected to the data that physical layer transmission comes up.
Fig. 1 and Fig. 2 gives subframe processing schematic diagram in existing TDD-LTE protocol processing.Fig. 1 top halfs are physical layer
The subframe of transmission, the latter half are the subframe of upper-layer protocol processing.As shown in Figure 1, sub-frame configuration is D, S, U, when D, D, downlink
The data of processing subframe are fixed on previous subframe and proceed by.Such as when physical layer will send subframe D1, the agreement on upper strata
Processing need in advance a subframe get out the corresponding downlink data of D1 subframes.As mentioned above, due to uplink treatment progress
（For example, the process of processing U subframes）Influence, downlink processing process may can not get out D1 subframes pair before D1 subframes
The downlink data answered, such as dotted portion represents that the downlink data of completion should be handled in previous subframe in Fig. 1.Further analyze
Go out, in view of uplink associated process and downlink associated process can obtain the timeslice of equivalent, distribute and meet only in a subframe
Downlink subframe loads 2 times of processor timeslice（It is generally used to handle uplink process that may be present）It could protect at any time
Card downlink processing is completed in time.But if in this way, when in a subframe uplink treatment progress be not enough to occupy with
During the identical timeslice of Down Procedure, and occur that process resource wastes, as shown in Figure 2.What the first row represented in Fig. 2 is physics
The subframe that layer is sent, center row represent the subframe of upper-layer protocol processing, it can be seen that the subframe to be sent relative to physical layer,
The complete downlink subframe of the subframe start to process data to be sent in advance.For example, before physical layer sends D2, upper-layer protocol processing
The corresponding downlink data of D2 subframes is handled.The data of downlink processing subframe, which are fixed, carries out the latter half as at upper-layer protocol
The subframe of reason.Bottom a line of Fig. 2 represents the subframe of upper-layer protocol processing, wherein, in the corresponding downlink datas of processing D2,
Uplink treatment progress is not enough to occupy the timeslice identical with Down Procedure, therefore when having handled the corresponding data of D2, it is also surplus
Some remaining timeslice resources, so there have been the situation that process resource wastes.
In one embodiment of the invention, there is provided a kind of TDD-LTE protocol processes methods under centralized base station framework.
This method uplink in a period of sub-frame according to all virtual base station protocol processes entities being mapped in same processor
Load and down load, determine that virtual base station protocol processes entity carries out downlink data processing and needs number of sub frames in advance；Then
For downlink subframe, virtual base station protocol processes entity shifts to an earlier date corresponding number of sub frames to handle downlink corresponding with the downlink subframe
Data.In the method, will be mapped to all virtual base station protocol processes entities of a processor core in the heart be considered as one it is whole
Body carrys out statistically down load.For example, all virtual base station protocol processes entities of a processor core in the heart can be will be mapped to
A referred to as virtual base station protocol processes entity sets（Hereinafter referred to as VBS-SET）, it is current by counting and calculating the VBS-SET
Uplink and downlink load in a period of sub-frame, and the above/down load is foundation, determine all virtual in the VBS-SET
The number of sub frames of the downlink D subframe advanced processings of base station protocol processing entities so that by uplink processing and downlink processing associated process
It is not overlapping as far as possible on subframe time.
In one embodiment, this method further includes statistics and is mapped at each virtual base station agreement on a processor
Entity ascending load and down load in a period of sub-frame are managed, and is calculated on the processor at all virtual base station agreements
The summation of ascending load and the summation of down load of entity are managed, so that virtual base station protocol processes on the processor can be obtained
Entity sets corresponding ascending load and down load in a period of sub-frame.Wherein statistically/down load is actually
It is the processor resource amount that statistics is consumed in the correlated process of processing uplink/downlink data.
In one embodiment, the virtual base station protocol processes entity sets on a processor has been counted is in a son
Ascending load is corresponded in frame period with after down load, can be determined virtually relative to the ratio of total load according to ascending load
Base station protocol processing entities, which carry out downlink data processing, needs number of sub frames in advance.Wherein, the virtual base station protocol processes are real
The total load of body set corresponds to ascending load in a period of sub-frame for virtual base station protocol processes entity sets and is born with downlink
The summation of load.Assuming that ascending load is K relative to the ratio of total load, i.e., processor timeslice needed for uplink process relevant treatment
The ratio for accounting for all processor timeslices in period of sub-frame is K, then the number of sub-frames M for needing advanced processing for downlink subframe can be with
Determined with following formula：
Wherein, M, which is represented, needs number of sub frames in advance, and N represents of subframe in a period of sub-frame
Number, K represent the ascending loads of all virtual base station protocol processes entities on the processor institute in a period of sub-frame total load
The ratio accounted for,Represent the downward rounding in fractions omitted part.
In yet another embodiment, the virtual base station protocol processes entity sets on a processor has been counted is at one
, can be by searching for ascending load and the ratio and needs of total load in period of sub-frame after corresponding ascending load and down load
The mapping table of number of sub frames in advance needs subframe in advance to determine that virtual base station protocol processes entity carries out downlink data processing
Number.For example, exemplified by still with subframe configuration structure D, S, U, D, D in TDD-LTE, the number of subframe is 5 in a period of sub-frame, tool
The section where ratio value between the ascending load and total load of body, need to shift to an earlier date the corresponding pass of number of sub frames with downlink subframe processing
It is table or mapping table, as shown in table 1：
Table 1
| Ratio value of the ascending load in total load | The number of sub-frames of downlink subframe processing in advance |
| 0–1/5 | 5 |
| 1/5–2/5 | 4 |
| 2/5–3/5 | 3 |
| 3/5–4/5 | 2 |
| More than 4/5 | 1 |
As shown in table 1, if ratio value between the virtual base station protocol processes entity sets ascending load and total load
In section（0,1/5）Interior, then the number of sub-frames that downlink subframe processing need to be in advance is 5；If between the ascending load and total load
Ratio value section [1/5,2/5) in, then downlink subframe processing need in advance number of sub-frames be 4, can and so on.This area
It should be understood to the one skilled in the art that table 1 is illustrated rather than carried out any using the number of subframe in a period of sub-frame as 5
Limitation.When the number of subframe in a period of sub-frame is other values, those skilled in the art can carry out suitably according to table 1
Adjustment or change.For example, when ascending load and the ratio value of total load are in section [k/N, k+1/N）When interior, at downlink subframe
The number of sub-frames that reason need to shift to an earlier date is N-k；Wherein k is integer, 0≤k≤N-1.In another example when ascending load and the ratio of total load
When value is more than (N-1)/N, the number of sub-frames that downlink subframe processing need to be in advance is 1.
Number of sub-frames in advance is needed according to determined by, all downlink subframes are subjected to advanced processing, and at first
Before the actual arrival of downlink subframe, the data preparation work of the continuous several downlink subframes started with this downlink subframe has been completed
Make, meet the requirement that downlink subframe in protocol processes needs to fulfil ahead of schedule before arrival；In addition downlink relevant treatment is transferred to
Before uplink relevant treatment, and closely connected with uplink relevant treatment by shifting to an earlier date the variable form of downlink subframe processing lead
Connect, centre is without the free time.Therefore this protocol processes method is used, can meet that it is same that downlink subframe processing is completed in time
When, maximize the utilization rate of the processor core.After this protocol processes method, void that a processor core can map
Intend the number of base station protocol processing entities, it is only necessary to meet upper in these one period of sub-frame of virtual base station protocol processes entity
The sum of down load is no more than the disposal ability of processor core.
Fig. 3 provides under centralized base station framework according to embodiments of the present invention subframe processing in TDD-LTE protocol processes and shows
It is intended to.As shown in figure 3, in a period of sub-frame, the data that have 3 D subframes need to carry out upper-layer protocol processing with prepare to
Physical layer is submitted, in addition with a U subframe protocol processes terminate in base station the data that physical layer transmission comes up after carry out
Processing.VBS-SET A, B, C correspond to three virtual base station protocol processes entity setses respectively, the corresponding uplink of these three set
Load/total load ratio is different, so needing number of sub frames in advance also different.For example, it is advanced by 5 for VBS-SET A
A subframe handles the corresponding downlink data of D1 subframes；It is corresponding to handle D1 subframes that 4 subframes are advanced by for VBS-SET B
Downlink data；3 subframes are advanced by for VBS-SET C to handle the corresponding downlink data of D1 subframes.These three virtual base stations
The data of first D subframe (for example, D1) are shifted to an earlier date different number of sub frames respectively and start advanced processing by protocol processes entity sets,
And 3 D subframes that continuous processing overlaps, it is only each on the processor where each VBS-SET before the arrival of U subframes
The downlink processing process of a virtual base station protocol processes entity participates in scheduling.According to virtual base station protocol processes entity sets uplink
Load accounts for the ratio of total load, and after first D subframe is shifted to an earlier date, continuous processing is several（Here it is 3 D subframes）Downlink
Frame, and when the processing of last downlink subframe is completed, be exactly in U subframes, U subframes here are in first shifted to an earlier date
Before a D subframes（For example, U is before D1 in Fig. 3）.Both it is complete in advance before arrival that downlink subframe needs in protocol processes had been met
Into requirement, be closely connected with uplink relevant treatment further through the variable form of the processing lead of downlink subframe in advance, centre does not have
It is available free, so as to maximize the utilization rate of the processor core.
As mentioned above, will be negative in the corresponding coverage in far end radio frequency port under centralized base station framework
Carry, centralized physical resource equipment is transferred to by high speed fibre and is handled.There may be in single physical equipment multiple
Base station processing entities（That is virtual base station or VBS）, base station, which is handled, mainly includes Base-Band Processing and protocol processes.For protocol processes
Physical resource equipment can be referred to protocol processes server, it is that have certain disposal ability, the equipment based on open platform,
It can support and/or run wherein the upper-layer protocol processing of multiple base stations.In view of the multithreading of protocol processes is related to inside
Property, the generic server of multiple multi-core processor compositions with multithreading ability, which can be used as, supports more base station protocol processing
Optimal selection.In centralized base station resource pool, one group of protocol processes server composition server zone can be set, to prop up
Support the protocol processes of all base stations in certain area.By being packaged pumping to the base station protocol process resource physically concentrated
As the complete virtual base station protocol processes entity of multiple logic functions can be formed, and each virtual base station protocol processes entity is expired
Protocol processes load requirement caused by the control data of all users in one overlay area of foot and data service.Each void
Intend multiple processor cores that base station protocol processing entities can be mapped in each corresponding protocol processes server, share
The process resource of processor core, while the memory space on shared place protocol processes server.In such centralized base
Under station rack structure, baseband processing unit of the remote radio unit (RRU) by optical fiber by pending base band data transmission to centralization, base
, can be by the corresponding data in each base station by transmitting the protocol processes clothes for being delivered to the base station and be mappeding to after the completion of tape handling
Business device, to be handled.
Fig. 4 gives the framework signal of protocol processing system under centralized base station framework according to an embodiment of the invention
Figure.The protocol processing system may include one or more virtual base station protocol processes entity setses, at the virtual base station agreement
Reason entity sets is formed by being mapped to all virtual base station protocol processes entities of a processor core in the heart, each virtual
Base station protocol processing entities set corresponds to a processor.The protocol processing system further includes load manager, it counts every
The load state of each virtual base station protocol processes entity on a processor.The protocol processing system further includes protocol processes control
Device, for controlling the protocol processes mode of each virtual base station protocol processes entity on each processor.
Referring now to Fig. 4, more specifically, the load of the virtual base station protocol processes entity sets on each processor may include
Following two aspects：1）The fixed load process part of each virtual base station protocol processes entity, 2）Each virtual base station agreement
The variable load process part of processing entities.
1）The characteristics of fixed load process part of each virtual base station protocol processes entity is to handle required resource not
Can with the load change of each base station and significant change, the part mainly include following content：a）It is mapped in agreement clothes
The chain of command relevant treatment for each virtual base station being engaged in device, such as RRC (Radio Resource Control, Radio Resource control
System) layer relevant treatment.User's access in only each virtual base station, or when type of service changes, just can actually take
Process resource, remaining time are in process sleep state, this part process resource occupancy is seldom, therefore number of users and service class
The change of type changes caused by it also can almost ignore；b）The characteristics of based under centralized base station framework and existing correlation
Control, including the control to each virtual base station in protocol processes entity sets, such as more base station cooperative radio resource managements, cooperation
Control etc..Keep stable since a processor core inter-process virtual base station number is opposite, and needed for the processing of this part
Virtual base station number of the process resource only with being mapped on the processor core is related, therefore shared process resource amount is also basic
Holding is stablized constant.
2）The characteristics of variable load process part of each virtual base station protocol processes entity is the required resource meeting of processing
The significant change with the load change of each base station, mainly including following content：a）Each user in each virtual base station
The uplink and downlink real data processing of each subframe, including interlayer copy, MAC（Medium Access Control, medium access
Control）, RLC（Radio Link Control, wireless spread-spectrum technology）, PDCP（Packet Data Convergence
Protocol, Packet Data Convergence Protocol）Layer data head is handled, segmentation and solution segmentation, encryption and decryption and integrity protection etc..This
Part processing occurs in each subframe, and pending data amount is big, and required process resource is very high, in addition the business number of each user
The change of amount and type of service（Include the access of new user）, the influence to this part process resource is bigger, required processing money
The change in source is also obvious；b）For the related RRM processing of each user, such as associate uplink dispatching algorithm, descending scheduling is calculated
Method, each virtual base station are interior for wireless resource management of user etc..In order to achieve the desired results, these control relevant treatment institutes
Need the complexity of algorithm may be very high, required process resource can even compare data processing.Further, since uplink and downlink number
According to the algorithm of scheduling in continuous service, and and number of users, customer service type of relationship is close, thus can will
The processing of this part and user data processing combine processing.
Each processor core in the heart, in addition to running above two parts agreement relevant treatment, some reserved place
Resource is managed, buffering can be played the role of, when the protocol processes side for the virtual base station protocol processes entity for being mapped in processor core
When formula needs to change and change with load, reservation process resource aids in its transfer process, there is provided extra process resource,
The seamless adjustment in real time of supported protocol processing mode., will not be because of namely when adjusting the protocol processes mode of protocol processes
Extra operation causes the no timely processing of processing that complete, because reserved processor timeslice can play buffering
Effect.In addition, when process resource is insufficient, reservation process resource can be first allocated as interim process resource, then considering further that is
Some virtual base station protocol processes entity in the no protocol processes entity sets by virtual base station is transferred to other processor cores
On, so reserved resource can ensure that the migration of virtual base station protocol processes entity is smoothed out.
With continued reference to Fig. 4, wherein, what load manager can be provided by each virtual base station protocol processes entity accordingly connects
Mouthful, obtain the uplink and downlink load of current each virtual base station protocol processes entity.Due to protocol processes and physical layer base band
Processing is different, and protocol processes entity can determine whether user accesses in itself in protocol processes, and whether customer service passage is established,
And which kind of protocol-dependent transmission mode established（Such as the AM patterns and UM patterns in LTE）Deng locating under different transmission modes
The processor time needed for reason same quantity of data business can not also be waited, therefore protocol processes entity can calculate present load
Exact value, that is, handle present load needed for the processor core time.Due to each processor core in protocol processes server
The heart can share the memory of protocol server, therefore the virtual base station protocol processes entity in each core can be after computational load
The relevant position of shared drive is saved it in, and can be accessed and be obtained by load manager.
Protocol processes controller obtains running on each virtual base station agreement of each processor core from load manager
After uplink and downlink load corresponding to processing entities, the virtual base station agreement of the processor core in the heart is then further calculated
Uplink and downlink load corresponding to processing entities set.Then, using protocol processes method discussed above according to virtual base
The corresponding uplink and downlink load of protocol processes of standing entity sets, determines each virtual base in the virtual base station protocol processes entity sets
Protocol processes of standing entity, which carries out downlink data processing, needs number of sub frames in advance, and notifies virtual in the processor core
Base station protocol processing entities.So shift to an earlier date corresponding number of sub frames for downlink subframe, virtual base station protocol processes entity to handle
Downlink data corresponding with the downlink subframe.
In addition, when load manager is born by analyzing the virtual base station protocol processes entity sets of each processor core
Carry, when the disposal ability of the processor core may be exceeded by learning the load of some set（Such as certain protocol processes entity sets
Certain time has persistently used the reserved resource of the processor core）, it is real that the processing of respective fictional base station protocol can be performed
Body migration operation, by one or several virtual base station protocol processes entity migration in the virtual base station protocol processes entity sets
To other processor cores, and migration source and move target processor core virtual base station in the heart are readjusted after completing to migrate
The protocol processes mode of protocol processes entity.
In the protocol processing system, each processor core corresponds to a virtual base station protocol processes entity sets, adopts
The protocol processes mode of each virtual base station protocol processes entity in the set is determined with method as discussed above.Work as protocol processes
The ascending load of virtual base station protocol entity set corresponding to controller monitoring to some processor core accounts for total load ratio
When relation changes, phase can be carried out to the protocol processes mode of the virtual base station protocol processes entity of the processor core in the heart
The adjustment answered, the whole flow process adjusted from load real time monitoring to the protocol processes mode for carrying out virtual base station protocol processes entity
It is as follows：
1) protocol processes controller monitors the load state of each virtual base station protocol processes entity in real time, when detecting certain
When the load of some virtual base station protocol processes entity changes on processor, go to 2);
2) protocol processes controller is recalculated corresponding to the whole virtual base station protocol processes entity sets of the processor
Ascending load accounts for the ratio of total load, determines the number of sub frames that downlink processing need to be in advance using mean discussed above, and judgement is
The no protocol processes mode for needing to change each virtual base station protocol processes entity on the processor.For example, it can search such as table 1 above
Shown ascending load accounts for the mapping table of the ratio of total load and number of sub frames that need to be in advance, judge new proportionate relationship whether and it
Preceding proportionate relationship belongs to a proportion in table, 1) continues monitoring load if so, then returning to；If it is not, then go to 3）；
3) protocol processes controller sends adjustment agreement to the virtual base station protocol processes entity in alignment processing device core
The order of processing mode, and this is provided and redefines the number of sub frames that downlink processing need to be in advance；
4) after the virtual base station protocol processes entity in alignment processing device core receives the order, the present sub-frame cycle into
The corresponding adjustment of row, completes the transition of both front and back processing mode.The principle of multiprocessing in the present sub-frame cycle is taken in adjustment, i.e.,
On the premise of present sub-frame cycle whole related processing task is completed, if the period of sub-frame still has and to locate under new processing mode
The data of reason, the then corresponding sub-frame data of advanced processing.If for example, being originally two subframe processing downlink datas in advance, adjust
3 subframe processing in advance are needed after whole, then present sub-frame cycle needs are on the premise of ensureing that this cycle plays processing completion, additionally
One downlink subframe load of processing, additional processing resources required at this time can be carried by the reserved resource of each processor core in the heart
For；
5) virtual base station protocol processes entity is corresponded in the present sub-frame cycle according to step 4）Mode be adjusted after, from
Next period of sub-frame starts, and carries out protocol processes with new processing mode, processing mode adjustment process terminates, return to step
1）.
When the uplink and downlink of the virtual base station protocol entity set corresponding to protocol processes controller monitoring to some core is born
, can also be to real by one or more of the set protocol processes when disposal ability of processor core can be can exceed that by carrying summation
Body is migrated to other processor cores, and at the same time to the virtual base station protocol processes entity on migration source and move target processor
Protocol processes mode be adjusted correspondingly.
Although the present invention be described by means of preferred embodiments, but the present invention be not limited to it is described here
Embodiment, further include made various changes and change without departing from the present invention.
Claims (9)
1. base station protocol processing method under a kind of centralized base station framework, this method include：
Step 1, according to all virtual base station protocol processes entities being mapped in same processor in a period of sub-frame on
Row load and down load, carry out according to ascending load ratio-dependent virtual base station protocol processes entity shared in total load
Downlink data processing needs number of sub frames in advance；
Step 2, corresponding number of sub frames is shifted to an earlier date for downlink subframe, the virtual base station protocol processes entity to handle and the downlink
The corresponding downlink data of subframe.
2. according to the method described in claim 1, the step 1 further includes：
Count each virtual base station protocol processes entity being mapped in same processor ascending load in a period of sub-frame
With down load, and
Calculate the summation of ascending load and the summation of down load of all virtual base station protocol processes entities on the processor.
3. according to the method described in claim 1, the number of sub frames for needing to shift to an earlier date wherein is determined by following formula：
Wherein, M, which is represented, needs number of sub frames in advance, and N represents the number of subframe in a period of sub-frame,
K represents that the ascending loads of all virtual base station protocol processes entities on the processor is shared in a period of sub-frame total load
Ratio,Represent the downward rounding in fractions omitted part.
4. according to the method described in claim 1, wherein when ascending load and the ratio value of total load section [k/N, k+1/N)
When interior, the number of sub frames for needing to shift to an earlier date is N-k；Wherein N represents the number of subframe in a period of sub-frame, and k is integer, and 0
≤k≤N-1。
5. base station protocol processing system under a kind of centralized base station framework, the system include：
For according to being mapped to all virtual base station protocol processes entities in same processor uplink in a period of sub-frame
Load and down load, under being carried out according to ascending load ratio-dependent virtual base station protocol processes entity shared in total load
Row data processing needs the device of number of sub frames in advance；
For for downlink subframe, the virtual base station protocol processes entity to shift to an earlier date corresponding number of sub frames to handle and downlink
The device of the corresponding downlink data of frame.
6. base station protocol processing system under a kind of centralized base station framework, the system include：
One or more virtual base station protocol processes entity setses, each virtual base station protocol processes entity sets include being mapped to
All virtual base station protocol processes entities in same processor；
Load manager, for counting each virtual base station protocol processes entity ascending load and downlink in a period of sub-frame
Load；
Protocol processes controller, for being born according to the corresponding ascending load of each virtual base station protocol processes entity sets with downlink
Carry, according to ascending load under each virtual base station protocol processes entity carries out in shared ratio-dependent set in total load
Row data processing needs number of sub frames in advance；
Wherein, the corresponding ascending load of each virtual base station protocol processes entity sets and down load are respectively institute in the set
There are ascending load summation of the virtual base station protocol processes entity in a period of sub-frame and down load summation；The virtual base
Protocol processes of standing entity shifts to an earlier date corresponding number of sub frames to handle downlink data corresponding with the downlink subframe for downlink subframe.
7. system according to claim 6, the protocol processes controller is additionally operable to：
When the corresponding ascending load of virtual base station protocol processes entity sets on a processor and the summation of down load surpass
When crossing the disposal ability of the processor, by one or more of set virtual base station protocol processes entity migration to another place
Manage in the virtual base station protocol processes entity sets on device；And
For virtual base station protocol processes entity sets involved by the migration, its corresponding ascending load and downlink are counted again
Load, and redefine wherein each virtual base station protocol processes entity and carry out the number of sub frames that downlink data processing needs to shift to an earlier date.
8. the system according to claim 6 or 7, wherein, when the corresponding uplink of virtual base station protocol processes entity sets is born
Carry with the ratio value of total load section [k/N, k+1/N) it is interior when, each virtual base station protocol processes entity carries out in the set
It is N-k that downlink data processing, which needs number of sub frames in advance,；Wherein N represents the number of subframe in a period of sub-frame, and k is integer,
And 0≤k≤N-1.
9. the system according to claim 6 or 7, wherein, the number of sub frames for needing to shift to an earlier date is determined by following formula：
Wherein, M, which is represented, needs number of sub frames in advance, and N represents the number of subframe in a period of sub-frame,
K represents that the ascending loads of all virtual base station protocol processes entities on the processor is shared in a period of sub-frame total load
Ratio,Represent the downward rounding in fractions omitted part.
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| EP2474193B1 (en) * | 2009-08-31 | 2014-01-01 | Telefonaktiebolaget L M Ericsson (PUBL) | Method and apparatus for scheduling assistance |
| CN103501498A (en) * | 2013-08-29 | 2014-01-08 | 中国科学院声学研究所 | Baseband processing resource allocation method and device thereof |
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| CN101399646A (en) * | 2007-09-30 | 2009-04-01 | 大唐移动通信设备有限公司 | Method and apparatus for indicating ACK/NACK transmission by LTE-TDD system |
| EP2474193B1 (en) * | 2009-08-31 | 2014-01-01 | Telefonaktiebolaget L M Ericsson (PUBL) | Method and apparatus for scheduling assistance |
| CN103501498A (en) * | 2013-08-29 | 2014-01-08 | 中国科学院声学研究所 | Baseband processing resource allocation method and device thereof |
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