CN105323777B - A kind of downlink joint sending control method, system and relevant apparatus - Google Patents
A kind of downlink joint sending control method, system and relevant apparatus Download PDFInfo
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- CN105323777B CN105323777B CN201410256917.8A CN201410256917A CN105323777B CN 105323777 B CN105323777 B CN 105323777B CN 201410256917 A CN201410256917 A CN 201410256917A CN 105323777 B CN105323777 B CN 105323777B
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Abstract
The embodiment of the invention discloses a kind of downlinks to combine sending control method, comprising: base station receives the multi-point cooperative CoMP measurement reported event that first service intra-cell users equipment UE is reported, and the CoMP measurement reported event carries neighboring BS information；The adjacent area CoMP of first service cell is chosen according to the received CoMP measurement reported event in the base station；CoMP UE is chosen from the UE for reporting the adjacent area CoMP, the sum of the downlink traffic transmission rate of the CoMP UE of the selection and existing interactive information transmission bandwidth are not more than the first preset value.The embodiment of the present invention also accordingly discloses a kind of base station and downlink joint sending control system.The embodiment of the present invention is in downlink JT technology by selection CoMP UE to control interactive information transmission bandwidth, it can solve the interactive information transmission bandwidth limitation problem that do not consider in existing scheme, and then downlink JT is avoided to occupy other systems transfer resource, ensure other systems downlink traffic transmission rate.
Description
Technical field
The present invention relates to downlinks to combine (Joint Transmission, the JT) technology of transmission more particularly to a kind of downlink connection
Close sending control method, system and relevant apparatus.
Background technique
Time-division long term evolution (Time Division Long Term Evolution, TD-LTE) system is used with frequency group
Net, Cell Edge User be subject to from the co-channel interference of multiple adjacent areas be TD-LTE system problem to be solved.Improve small
The co-channel interference of area edge user there are mainly two types of solution: first is that using the solution of coordinates interference, by small
Section interference coordination (Inter Cell Interference Coordination, ICIC) coordinates the resource point of neighboring community
With (such as frequency domain resource distribution and power distribution), evade co-channel interference；Another solution is to utilize interference signal, multiple spot association
It is (such as more by the cooperation for introducing multiple transmission/receiving nodes with (Coordinated Multiple Points, CoMP) technology
Interaction scheduling information, user data between node, while receiving/sending user data etc.), interference signal can be converted in useful letter
Number, improve community marginal user performance.
Fig. 1 is CoMP technical principle schematic diagram, as shown in Figure 1, residing at the edge customer of cell1 in traditional network
UE1 will receive the downlink signal of cell1 and cell2 simultaneously, and the downlink signal for the cell1 that UE1 is received is useful signal,
The downlink signal for the cell2 that UE1 is received is interference signal.In a network introduce CoMP technology after, can introduce cell1 with
Cooperation between two network nodes of cell2.Cell1 by the identification information, scheduling information and downlink service data of UE1 share to
Cell2, then cell1 and cell2 is simultaneously that UE1 sends lower line number in the descending scheduling resource that UE1 is obtained, while with frequency
According to.At this point, the downlink signal for the cell2 that UE1 is received becomes useful signal from interference signal, and the process is transparent to UE1
's.By introducing CoMP technology, the downlink signal and interference plus noise ratio (Signal to of edge customer in network side
Interference plus Noise Ratio, SINR) will greatly it be enhanced, the downstream throughput performance of edge customer
Pole is obtained significantly to be promoted.
When improving edge customer uplink and downlink handling capacity, difference can use uplink and downlink CoMP scheme.Uplink
In CoMP scheme, multiple receiving nodes carry out joint reception to the uplink signal of same CoMP UE, and interaction to serving cell into
Row merges, and Cell Edge User upstream sinr can be improved, to promote uplink throughput performance, this scheme is known as uplink joint
It receives (Joint Reception, JR)；In downlink CoMP scheme, pass through interaction CoMP UE mark, tune between multiple sending nodes
The information such as resource and user data are spent, downlink data transmission, the process are carried out to same CoMP UE on identical running time-frequency resource
It is transparent to CoMP UE, but since interference signal is converted into useful signal, the downlink reception SINR and downlink of CoMP UE handles up
Amount performance significantly improves, this scheme is known as downlink joint and sends (Joint Transmission, JT).Downlink joint hair
It send in scheme, has benefited from multiple downlink joint sending nodes simultaneously with the cooperative transmission of frequency, terminal side can efficiently accomplish interference
Emission diversity gain is obtained while elimination and emits the enhancing of signal power.Simulation result shows under Cell Edge User
Row throughput gain is 25%~30% or so.
Fig. 2 is downlink JT schematic diagram, as shown in Fig. 2, the information of serving cell interaction CoMP UE is extremely in downlink JT scheme
Cooperation cell is the basis of downlink joint transmission between multinode.In same indoor baseband processing unit (the Building Base
Band Unit, BBU) minizone in frame carries out downlink JT, and interactive information is different in baseband board inter-process, or in frame
By backboard interaction between baseband board, without introducing additional transmission requirement；But it is carried out between the different community under different BBU
The downlink JT downlink JT of minizone (namely between station), needs to transmit CoMP UE scheduling information and user data between BBU, can be right
Network introduces additional transmission demand.Especially it is being based on Packet Transport Network (Packet Transport Network, PTN) now net
When transmission conditions dispose downlink JT technology, the interaction of CoMP UE data can generate additional biography to existing PTN transmission network between BBU
Defeated load and the requirement of additional transmission bandwidth.
In traditional scheme, think that transmission conditions are ideal in downlink joint delivery plan, thus does not have for CoMP UE
It selects and limits, the transmission bandwidth of minizone interactive information is not also required.But in practical now wet end administration, this ideal
Situation is not present.To which since multisystem shares transmission network resource, the introducing of downlink JT technology may cause other systems
Transfer resource is limited, the decline of downlink traffic transmission rate.
Summary of the invention
In view of this, the embodiment of the present invention provides to solve existing technical problem:
A kind of downlink joint sending control method, comprising:
Base station receives the multi-point cooperative CoMP measurement reported event that first service intra-cell users equipment UE is reported, described
CoMP measures reported event and carries neighboring BS information；
The adjacent area CoMP of first service cell is chosen according to the received CoMP measurement reported event in the base station；
CoMP UE, the downlink traffic transmission speed of the CoMP UE of the selection are chosen from the UE for reporting the adjacent area CoMP
The sum of rate and existing interactive information transmission bandwidth are not more than the first preset value.
Preferably, the base station receives the CoMP measurement reported event that UE is reported, comprising:
The base station receives the UE and joins in the downlink that the serving cell downlink reference signal of acquisition receives power and adjacent area
When examining the difference of signal reception power and meeting preset first condition, the CoMP that the base station Xiang Suoshu reports measures reported event, described
CoMP measures reported event and carries the neighboring BS information.
Preferably, the CoMP measurement reported event also carries neighboring area signal strength information,
The adjacent area CoMP of first service cell, packet are chosen according to the received CoMP measurement reported event in the base station
It includes:
Reported event is measured according to the received CoMP, chooses the maximum adjacent area of signal strength as first service cell
The adjacent area CoMP.
Preferably, the base station is adjacent according to the CoMP that the received CoMP measurement reported event chooses first service cell
Area are as follows: in each TTI, CoMP measures the CoMP neighbour that reported event chooses first service cell based on the received for the base station
Area.
Preferably, described choose CoMP UE from the UE for reporting the adjacent area CoMP, comprising:
Judge all UE for reporting the adjacent area CoMP downlink traffic transmission rate and existing interactive information transmission bandwidth
The sum of whether be not more than the first preset value, if so, determining that all UE for reporting the adjacent area CoMP are CoMP UE；It is no
Then, the highest UE of downlink traffic transmission rate in the UE for reporting the adjacent area CoMP is rejected, continues to judge described in remaining report
Whether the sum of the downlink traffic transmission rate of the UE of the adjacent area CoMP and existing interactive information transmission bandwidth are not more than the first preset value,
So circulation, until the downlink traffic transmission rate and existing interactive information transmission belt of the remaining UE for reporting the adjacent area CoMP
It is the sum of wide to be not more than the first preset value, determine that the remaining UE for reporting the adjacent area CoMP is CoMP UE.
Preferably, the initial value of the existing interactive information transmission bandwidth is 0, this method in each TTI further include:
After choosing CoMP UE every time, the downlink traffic transmission rate of the CoMP UE is added to existing interactive information and is passed
Defeated bandwidth.
Preferably, the downlink traffic transmission rate by the CoMP UE is added to existing interactive information transmission bandwidth
Later, this method further include:
Judge whether existing interactive information transmission bandwidth meets preset second condition, if so, carrying out next in this TTI
The secondary adjacent area CoMP selection course；Otherwise, CoMP UE selection terminates in this TTI.
A kind of base station, comprising: receiving module, first choose module and second and choose module；Wherein,
The receiving module measures reported event for receiving the CoMP that first service intra-cell users equipment UE is reported,
The CoMP measurement reported event carries neighboring BS information；
Described first chooses module, for choosing first service cell according to the received CoMP measurement reported event
The adjacent area CoMP；
Described second chooses module, for choosing CoMP UE from the UE for reporting the adjacent area CoMP, the selection
The sum of the downlink traffic transmission rate of CoMP UE and existing interactive information transmission bandwidth are not more than the first preset value.
Preferably, the receiving module, connects specifically for receiving the UE in the serving cell downlink reference signal of acquisition
When the difference that receipts power and the downlink reference signal of adjacent area receive power meets preset first condition, the base station Xiang Suoshu is reported
CoMP measures reported event, and the CoMP measurement reported event carries the neighboring BS information.
Preferably, the received CoMP measurement reported event of receiving module also carries neighboring area signal strength information,
Described first chooses module, is specifically used for measuring reported event according to the received CoMP, chooses signal strength
CoMP adjacent area of the maximum adjacent area as first service cell.
Preferably, described first chooses module, it is specifically used in each TTI, CoMP measurement based on the received reports thing
The adjacent area CoMP of part selection first service cell.
Preferably, described second chooses module, specifically for judging the lower industry of all UE for reporting the adjacent area CoMP
Whether the sum of the transmission rate and existing interactive information transmission bandwidth of being engaged in are not more than the first preset value, if so, determining described all
Reporting the UE of the adjacent area CoMP is CoMP UE；Otherwise, downlink traffic transmission rate in the UE for reporting the adjacent area CoMP is rejected
Highest UE, continues the downlink traffic transmission rate for judging the remaining UE for reporting the adjacent area CoMP and existing interactive information passes
Whether the sum of defeated bandwidth is not more than the first preset value, so recycles, until the downlink of the remaining UE for reporting the adjacent area CoMP
The sum of service transmission rate and existing interactive information transmission bandwidth are not more than the first preset value, determine it is described it is remaining report it is described
The UE of the adjacent area CoMP is CoMP UE.
Preferably, described second chooses module, it is also used to after choosing CoMP UE every time, by the downlink of the CoMP UE
Service transmission rate is added to existing interactive information transmission bandwidth, in each TTI, the existing interactive information transmission bandwidth
Initial value is 0.
Preferably, described second chooses module, it is also used to be added to by the downlink traffic transmission rate of the CoMP UE
After existing interactive information transmission bandwidth, judge whether existing interactive information transmission bandwidth meets preset second condition, if
It is that the first selection module is notified to carry out in this TTI the adjacent area CoMP selection course next time；Otherwise, CoMP UE is selected in this TTI
Terminate.
A kind of downlink joint sending control system, including base station and UE, wherein
The base station is above-mentioned base station,
The UE, the downlink reference signal that power and adjacent area are received for measuring serving cell downlink reference signal receive function
Rate；And when the difference that the serving cell downlink reference signal obtained receives the downlink reference signal reception power of power and adjacent area is full
When the preset first condition of foot, base station belonging to Xiang Suoshu serving cell sends CoMP and measures reported event.
Downlink described in the embodiment of the present invention combines sending control method, system and relevant apparatus, and base station receives the first clothes
The multi-point cooperative CoMP measurement reported event that business intra-cell users equipment UE is reported, the CoMP measurement reported event carry adjacent area
Information；The adjacent area CoMP of first service cell is chosen according to the received CoMP measurement reported event in the base station；From reporting
CoMP UE is chosen in the UE of the adjacent area CoMP, the downlink traffic transmission rate of the CoMP UE of the selection interacts letter with existing
It ceases the sum of transmission bandwidth and is not more than the first preset value.The technical solution through the embodiment of the present invention, in downlink JT technology
By selection CoMP UE to control interactive information transmission bandwidth, the interactive information that do not consider in existing scheme can solve
Transmission bandwidth limitation problem, and then downlink JT is avoided to occupy other systems transfer resource, ensure other systems downlink traffic transmission
Rate.
Detailed description of the invention
Fig. 1 is CoMP technical principle schematic diagram；
Fig. 2 is downlink JT schematic diagram；
Fig. 3 is that a kind of downlink of the embodiment of the present invention combines sending control method flow diagram；
Fig. 4 is a kind of architecture of base station schematic diagram of the embodiment of the present invention；
Fig. 5 is that the joint of downlink described in the specific embodiment of the invention 1 sends control flow schematic diagram；
Fig. 6 is that the joint of downlink described in the specific embodiment of the invention 2 sends control flow schematic diagram.
Specific embodiment
In various embodiments of the present invention: base station receives the multi-point cooperative that first service intra-cell users equipment UE is reported
CoMP measures reported event；The CoMP of first service cell is chosen according to the received CoMP measurement reported event in the base station
Adjacent area；CoMP UE, the downlink traffic transmission rate of the CoMP UE of the selection are chosen from the UE for reporting the adjacent area CoMP
It is not more than the first preset value with the sum of existing interactive information transmission bandwidth.
Now the PTN transmission bandwidth in net is that (such as GSM, TD-SCDMA, WLAN, TD-LTE) is shared between multiple networks
's.Volume caused by CoMP UE information is interacted between serving cell and cooperation cell when downlink JT technology between deployment station in existing net
Outer transmission bandwidth demand will affect the transmission conditions of other networks.Thus needed pair when downlink JT technology between existing wet end administration station
The additional transmissions bandwidth that minizone interaction CoMP UE information generates makes the restriction (additional transmissions for such as requiring downlink JT introduced
Bandwidth is up to bMbps).
In downlink JT scheme, the following set of base station side, to choose and limit CoMP UE:
1. collaboration set: in each Transmission Time Interval (TTI), the adjacent area { cell1, cell2 ... celln } in collaboration set
Downlink joint will be carried out to corresponding CoMP UE in identical PRB resource with serving cell to send.The every TTI of the set is carried out
Refresh.
2.CoMP UE alternative collection: { UE1, UE2 ... UEn }, in each TTI, the UE in the set is to serving cell
CoMP is reported to measure reported event.
3.CoMP alternative adjacent area collection cellA1, cellA2 ... cellAn }: each user can measure multiple adjacent areas simultaneously
Downlink reference signal receives power level, all adjacent area composition CoMP for meeting CoMP measurement reported event of all reporting of user
Alternative adjacent area collection shows that there are the adjacent areas that one or more can carry out downlink JT cooperation in the set.
4.CoMP UE collection { UEA1, UEA2 ... UEAn }: each adjacent area in serving cell and collaboration set, to the UE in the set
Downlink joint transmission is carried out, the downlink joint transmission of different UE is distinguished by frequency domain resource.
The transmission bandwidth of interactive information in downlink JT scheme is defined, it is biggish in interactive information transmission bandwidth demand
The gain of downlink JT scheme will likely be influenced under scene (when such as edge customer quantity is more or accounting is larger in the cell).Especially
The interactive information transmission bandwidth realized by selection, restriction CoMP UE number is controlled, it would be possible to reduce part edge user
Obtain the chance of CoMP gain.It thus needs to study preferably CoMP UE selection scheme, and interactive information transmission is limited based on this
Bandwidth, to obtain CoMP gain to the maximum extent.
Fig. 3 is that a kind of downlink of the embodiment of the present invention combines sending control method flow diagram, as shown in figure 3, this method
Include:
Step 301: base station receives the multi-point cooperative CoMP measurement that first service intra-cell users equipment UE is reported and reports thing
Part, the CoMP measurement reported event carry neighboring BS information；
Step 302: the CoMP of first service cell is chosen according to the received CoMP measurement reported event in the base station
Adjacent area；
Step 303: CoMP UE, the CoMP UE of the selection are chosen from the UE for reporting the adjacent area CoMP in the base station
Downlink traffic transmission rate and the sum of existing interactive information transmission bandwidth be not more than the first preset value.
Here, the adjacent area CoMP is reported to refer to that the CoMP measurement reported event reported carries the CoMP neighboring BS information.
Optionally, the base station receives the CoMP measurement reported event that UE is reported, comprising:
The base station receives the UE and joins in the downlink that the serving cell downlink reference signal of acquisition receives power and adjacent area
When examining the difference of signal reception power and meeting preset first condition, the CoMP that the base station Xiang Suoshu reports measures reported event, described
CoMP measures reported event and carries the neighboring BS information.
Optionally, the CoMP measurement reported event also carries neighboring area signal strength information,
The adjacent area CoMP of first service cell, packet are chosen according to the received CoMP measurement reported event in the base station
It includes:
Reported event is measured according to the received CoMP, chooses the maximum adjacent area of signal strength as first service cell
The adjacent area CoMP.
Specifically, the selection of downlink JT user is triggered by the CoMP measurement reported event of terminal.Terminal resides in service
After cell, the downlink reference signal intensity of serving cell and the multiple adjacent areas of surrounding will be measured, measurement obtains serving cell respectively
The downlink reference signal that downlink reference signal receives power RSRP and multiple adjacent areas receive power NRSRP=NRSRP1,
NRSRP2,…NRSRPn}.When the difference of the RSRP and the certain NRSRP in adjacent area of some user measurement meet base station side configuration
CoMP measure reported event thresholding when, such as (RSRP-NRSRPi) ∈ [m, n], the user will report CoMP measurement reported event to
Serving cell.Adjacent area { cellA1, cellA2 ... the cellAn } composition for meeting CoMP measurement reported event of all reporting of user
The alternative adjacent area collection of CoMP.In the embodiment of the present invention, is concentrated in the alternative adjacent area CoMP that all UE are reported and choose the strongest neighbour of signal
Area, namely choose the smallest adjacent area celli of the value in RSRP-NRSRPi ∈ [m, n] range.
CoMP is measured in reported event, and the value of m and n is configurable, with m=-3dB, for n=3dB value.Work as RSRP-
NRSRP is greater than 3dB, then neighboring area signal intensity is relatively weak, and the power that joint sends eliminated interference and useful signal increases
Potent fruit is all relatively limited；When RSRP-NRSRP is less than -3dB, neighboring area signal is stronger, will trigger handoff procedure.Simulation result
Show especially as RSRP-NRSRP ∈ [m, 0], relatively strong for neighboring area signal corresponding service cell, CoMP gain is relatively high.
Thus serving cell will concentrate the strongest adjacent area of selection signal to be preferentially used as cooperation cell from the alternative adjacent area CoMP.The principle is choosing
Take the most strong adjacent area selection principle of the adjacent area CoMP.
After serving cell is according to most strong adjacent area principle selection adjacent area celli is chosen, such as without considering interactive information transmission belt
Width requires, then the adjacent area can be directly added to the collaboration set of serving cell, serving cell and adjacent area then report the adjacent area
UEi downlink PRB scheduling resource on to UEi carry out downlink joint send.Since the frequency domain resource of serving cell can be with frequency division
Multiple central users and CoMP UE are served, thus serving cell can also be alternatively adjacent in CoMP according to most strong adjacent area selection principle
Area, which concentrates, selects the most strong adjacent area in other adjacent areas that collaboration set is added, to carry out in different PRB resources to multiple CoMP UE
Downlink JT joint is sent.
But since serving cell can support multiple CoMP UE, CoMP UE in the different PRB resources in each TTI
It is shared that the scheduling information and user data of each CoMP UE concentrated is both needed to the transmission between serving cell and cooperation adjacent area.Cause
And when number of users is more, it is necessary to introduce additional transmission bandwidth to interactive information and make restriction.
Optionally, the CoMP that first service cell is chosen according to the received CoMP measurement reported event in the base station is adjacent
Area are as follows: in each TTI, CoMP measures the CoMP neighbour that reported event chooses first service cell based on the received for the base station
Area.Specifically, serving cell selects the adjacent area CoMP according to most strong adjacent area selection principle in each TTI.
It is optionally, described that CoMP UE is chosen from the UE for reporting the adjacent area CoMP, comprising:
Judge all UE for reporting the adjacent area CoMP downlink traffic transmission rate and existing interactive information transmission bandwidth
The sum of whether be not more than the first preset value, if so, determining that all UE for reporting the adjacent area CoMP are CoMP UE；It is no
Then, the highest UE of downlink traffic transmission rate in the UE for reporting the adjacent area CoMP is rejected, continues to judge described in remaining report
Whether the sum of the downlink traffic transmission rate of the UE of the adjacent area CoMP and existing interactive information transmission bandwidth are not more than the first preset value,
So circulation, until the downlink traffic transmission rate and existing interactive information transmission belt of the remaining UE for reporting the adjacent area CoMP
It is the sum of wide to be not more than the first preset value, determine that the remaining UE for reporting the adjacent area CoMP is CoMP UE.
For example, the strongest adjacent area of signal is celli, then serving cell is according to the downlink business of all UE for reporting celli
Transmission rate chooses CoMP UE, and appraisal procedure is, if the downlink traffic transmission rate of UEi is transmitted plus existing interactive information
It is more than or equal to interactive information transmission bandwidth in minizone after bandwidth and requires (bMbps), then downlink joint is not carried out to UEi and sent, phase
That answers does not add the collaboration set of celli to serving cell yet；If the downlink traffic transmission rate of UEi adds existing interactive information
After transmission bandwidth, be less than interactive information transmission bandwidth and require (bMbps), then celli is added to collaboration set, serving cell with most
Strong adjacent area celli carries out downlink joint to UEi and sends.If there is multiple UE simultaneously, such as { UEi...UEm } is on serving cell
Most strong adjacent area celli is reported, then assesses the sum of the downlink traffic transmission rate of { UEi...UEm } plus existing interactive information transmission belt
After width, if be less than bMbps: such as less than, then the CoMP UE of { UEi...UEm } as serving cell and celli；Such as larger than,
The highest user UEj of downlink traffic transmission rate in { UEi...UEm } is then rejected, until remaining users in { UEi...UEm }
The sum of downlink traffic transmission rate is less than bMbps after adding existing interactive information transmission bandwidth, and collaboration set just is added in celli,
Downlink joint is carried out to the remaining users in { UEi...UEm } to send.
Optionally, in each TTI, the initial value of the existing interactive information transmission bandwidth is 0, this method further include:
After choosing CoMP UE every time, the downlink traffic transmission rate of the CoMP UE is added to existing interactive information and is passed
Defeated bandwidth.
Specifically, serving cell concentrates the downlink JT user chosen to CoMP UE, and real-time servicing, refreshing are " existing
Interactive information transmission bandwidth ", which is equal to the sum of the downlink traffic transmission rate of all downlink CoMP UE chosen, single
Position is Mbps.Before the first time CoMP UE in each TTI chooses, which is reset.
Optionally, the downlink traffic transmission rate by the CoMP UE is added to existing interactive information transmission bandwidth
Later, this method further include:
Judge whether existing interactive information transmission bandwidth meets preset second condition, if so, carrying out next in this TTI
The secondary adjacent area CoMP selection course；Otherwise, CoMP UE selection terminates in this TTI.
It should be noted that " the existing interactive information transmission bandwidth " of real-time update indicates that downlink joint sends interactive information
Transmission bandwidth.If existing interactive information transmission bandwidth is much smaller than the first preset value (such as bMbps and existing interactive information transmission bandwidth
Difference be not less than the second preset value), then enter the adjacent area CoMP selection course next time；Such as close to the first preset value (such as bMbps
With the difference of existing interactive information transmission bandwidth less than the second preset value), then terminate entire CoMP UE selection course in this TTI.
After CoMP UE selection course in each TTI, serving cell and adjacent area each in collaboration set are right in the TTI
Each CoMP UE that CoMP UE is concentrated carries out downlink joint and sends, and each CoMP UE is distinguished by frequency domain resource.
The embodiment of the present invention also correspondingly proposes a kind of base station, as shown in figure 4, the base station includes: receiving module 41,
One, which chooses module 42 and second, chooses module 43；Wherein,
Receiving module 41 measures reported event, institute for receiving the CoMP that first service intra-cell users equipment UE is reported
It states CoMP measurement reported event and carries neighboring BS information；
First chooses module 42, for choosing first service cell according to the received CoMP measurement reported event
The adjacent area CoMP；
Second chooses module 43, for choosing CoMP UE, the CoMP of the selection from the UE for reporting the adjacent area CoMP
The sum of the downlink traffic transmission rate of UE and existing interactive information transmission bandwidth are not more than the first preset value.
Optionally, receiving module 41 are received specifically for receiving the UE in the serving cell downlink reference signal of acquisition
When the difference that power and the downlink reference signal of adjacent area receive power meets preset first condition, CoMP that the base station Xiang Suoshu reports
Reported event is measured, the CoMP measurement reported event carries the neighboring BS information.
Optionally, the received CoMP of receiving module 41 measures reported event and also carries neighboring area signal strength information,
First chooses module 42, is specifically used for measuring reported event according to the received CoMP, chooses signal strength most
CoMP adjacent area of the big adjacent area as first service cell.
Optionally, first module 42 is chosen, be specifically used in each TTI, CoMP measures reported event based on the received
Choose the adjacent area CoMP of first service cell.
Optionally, second module 43 is chosen, specifically for judging the downlink business of all UE for reporting the adjacent area CoMP
The sum of transmission rate and existing interactive information transmission bandwidth whether be not more than the first preset value, if so, determine it is described it is all on
Reporting the UE of the adjacent area CoMP is CoMP UE；Otherwise, it rejects and reports in the UE of the adjacent area CoMP downlink traffic transmission rate most
High UE, continues the downlink traffic transmission rate for judging the remaining UE for reporting the adjacent area CoMP and existing interactive information is transmitted
Whether the sum of bandwidth is not more than the first preset value, so recycles, until the lower industry of the remaining UE for reporting the adjacent area CoMP
Be engaged in the sum of transmission rate and existing interactive information transmission bandwidth be not more than the first preset value, determine it is described it is remaining report described in
The UE of the adjacent area CoMP is CoMP UE.
Optionally, second module 43 is chosen, be also used to after choosing CoMP UE every time, by the lower industry of the CoMP UE
Business transmission rate is added to existing interactive information transmission bandwidth, in each TTI, at the beginning of the existing interactive information transmission bandwidth
Initial value is 0.
Optionally, described second module is chosen, is also used to be added to by the downlink traffic transmission rate of the CoMP UE
After existing interactive information transmission bandwidth, judge whether existing interactive information transmission bandwidth meets preset second condition, if
It is that the first selection module is notified to carry out in this TTI the adjacent area CoMP selection course next time；Otherwise, CoMP UE is selected in this TTI
Terminate.
The embodiment of the present invention also correspondingly proposes a kind of downlink joint sending control system, the system include base station and
UE, wherein
The base station is base station shown in Fig. 4,
The UE, the downlink reference signal that power and adjacent area are received for measuring serving cell downlink reference signal receive function
Rate；And when the difference that the serving cell downlink reference signal obtained receives the downlink reference signal reception power of power and adjacent area is full
When the preset first condition of foot, base station belonging to Xiang Suoshu serving cell sends CoMP and measures reported event.
Below by specific embodiment, technical solution of the present invention is described in further detail.
Specific embodiment 1
Fig. 5 is that the joint of downlink described in the specific embodiment of the invention 1 sends control flow schematic diagram, as shown in figure 5, the stream
Journey includes:
Step 501: in some TTI, serving cell receives the CoMP measurement reported event that multiple UE are reported.
Step 502: serving cell selects the adjacent area CoMP celli according to most strong adjacent area selection principle.
Step 503: serving cell chooses CoMP UE in all UE for reporting celli.
504: after choosing CoMP UE, judging whether existing interactive information transmission bandwidth is less than bMbps, held if so, returning
Row step 502；Otherwise, step 505 is executed.
Step 505: completing CoMP user in the TTI and select, serving cell carries out downlink with adjacent area each in collaboration set and combines
It sends.
In the present embodiment, the operation that serving cell executes specifically is completed as the base station belonging to it.
Specific embodiment 2
Fig. 6 is that the joint of downlink described in the specific embodiment of the invention 2 sends control flow schematic diagram, as shown in figure 5, the stream
Journey includes:
Step 601: when selecting CoMP user in every TTI for the first time, serving cell resets existing interactive information transmission belt width values.
Step 602: judging the most strong adjacent area celli to selection, if there are multiple UE to report the adjacent area, if so, executing
Step 603；Otherwise, step 606 is executed.
Step 603: judging whether the sum of downstream traffic rate of these UE is less than plus existing interactive information transmission bandwidth
BMbps, if so, executing step 604；Otherwise, step 605 is executed.
Step 604: choosing these UE is downlink JT CoMP UE, and collaboration set is added in celli, and CoMP is added in these UE
User's collection, goes to step 609.
Step 605: the highest user of downstream traffic rate in these UE is deleted, until the downstream traffic rate of remaining users
The sum of plus existing interactive information transmission bandwidth be less than bMbps, go to step 604.
Step 606: judge whether the downstream traffic rate of the UE is less than bMbps plus existing interactive information transmission bandwidth,
If so, executing step 607；Otherwise, step 608 is executed.
Step 607: choosing the UE is downlink JT CoMP UE, and collaboration set is added in celli, which is added CoMP user
Collection, goes to step 609.
Step 608: not choosing the UE is downlink JT CoMP UE, collaboration set is not added in celli.
Step 609: the existing interactive information bandwidth of service cell updating.
In the present embodiment, the operation that serving cell executes specifically is completed as the base station belonging to it.
The scheme through the foregoing embodiment, base station side can be most suitable for the CoMP UE that downlink joint is sent by selection,
To control the transmission bandwidth of information exchange while obtaining downlink JT gain to the maximum extent, after introducing downlink JT technology
The newly-increased load cost control of network is in minimum.Compared with prior art, the program is with more feasibility and existing net application.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (9)
1. a kind of downlink combines sending control method, which is characterized in that this method comprises:
Base station receives the multi-point cooperative CoMP measurement reported event that first service intra-cell users equipment UE is reported, and the CoMP is surveyed
It measures reported event and carries neighboring BS information and neighboring area signal strength information；
In each TTI, signal strength is chosen most according to the neighboring BS information and the neighboring area signal strength information in the base station
CoMP adjacent area of the big adjacent area as first service cell；
The downlink traffic transmission rate for looping to determine all UE for reporting the adjacent area CoMP, with existing interactive information transmission bandwidth
The sum of whether be not more than the first preset value, if so, determining that all UE for reporting the adjacent area CoMP are CoMP UE；It is no
Then, the highest UE of downlink traffic transmission rate in the UE for reporting the adjacent area CoMP is rejected；
After rejecting downlink traffic transmission rate highest UE, if the downlink of the remaining UE for reporting the adjacent area CoMP
Service transmission rate is not more than the first preset value with the sum of existing interactive information transmission bandwidth, determines and described remaining reports institute
The UE for stating the adjacent area CoMP is CoMP UE.
2. the method according to claim 1, wherein the base station, which receives the CoMP measurement that UE is reported, reports thing
Part, comprising:
The base station receives the UE and believes in the descending reference that the serving cell downlink reference signal of acquisition receives power and adjacent area
The difference of power number is received when meeting preset first condition, the CoMP that the base station Xiang Suoshu reports measures reported event, the CoMP
It measures reported event and carries the neighboring BS information.
3. the method according to claim 1, wherein in each TTI, the existing interactive information transmission bandwidth
Initial value be 0, this method further include:
After choosing CoMP UE every time, the downlink traffic transmission rate of the CoMP UE is added to existing interactive information transmission belt
It is wide.
4. according to the method described in claim 3, it is characterized in that, the downlink traffic transmission rate by the CoMP UE
It is added to after existing interactive information transmission bandwidth, this method further include:
Judge whether existing interactive information transmission bandwidth meets preset second condition, if so, carrying out in this TTI next time
The adjacent area CoMP selection course；Otherwise, CoMP UE selection terminates in this TTI.
5. a kind of base station, which is characterized in that the base station includes: receiving module, the first selection module and the second selection module；Its
In,
The receiving module measures reported event for receiving the CoMP that first service intra-cell users equipment UE is reported, described
CoMP measures reported event and carries neighboring BS information and neighboring area signal strength information；
Described first chooses module, in each TTI, the base station to be strong according to the neighboring BS information and the neighboring area signal
Information is spent, CoMP adjacent area of the maximum adjacent area of signal strength as first service cell is chosen；
Described second chooses module, for looping to determine the downlink traffic transmission rate of all UE for reporting the adjacent area CoMP,
Whether be not more than the first preset value with the sum of existing interactive information transmission bandwidth, if so, determine it is described it is all report it is described
The UE of the adjacent area CoMP is CoMP UE；Otherwise, it is highest to reject downlink traffic transmission rate in the UE for reporting the adjacent area CoMP
UE；After rejecting downlink traffic transmission rate highest UE, if the downlink of the remaining UE for reporting the adjacent area CoMP
Service transmission rate is not more than the first preset value with the sum of existing interactive information transmission bandwidth, determines and described remaining reports institute
The UE for stating the adjacent area CoMP is CoMP UE.
6. base station according to claim 5, which is characterized in that
The receiving module receives power and adjacent area in the serving cell downlink reference signal of acquisition specifically for receiving the UE
Downlink reference signal receive the difference of power when meeting preset first condition, the CoMP measurement that the base station Xiang Suoshu reports reports thing
Part, the CoMP measurement reported event carry the neighboring BS information.
7. base station according to claim 5, which is characterized in that
Described second chooses module, is also used to after choosing CoMP UE every time, by the downlink traffic transmission speed of the CoMP UE
Rate is added to existing interactive information transmission bandwidth, and in each TTI, the initial value of the existing interactive information transmission bandwidth is 0.
8. base station according to claim 7, which is characterized in that
Described second chooses module, is also used to the downlink traffic transmission rate of the CoMP UE being added to existing interaction letter
After ceasing transmission bandwidth, judge whether existing interactive information transmission bandwidth meets preset second condition, if so, notifying first
It chooses module and carries out in this TTI the adjacent area CoMP selection course next time；Otherwise, CoMP UE selection terminates in this TTI.
9. a kind of downlink combines sending control system, which is characterized in that the system includes base station and UE, wherein
The base station is the described in any item base stations of claim 5 to 8,
The UE, the downlink reference signal that power and adjacent area are received for measuring serving cell downlink reference signal receive power；
And when the difference that the serving cell downlink reference signal obtained receives the downlink reference signal reception power of power and adjacent area meets
When preset first condition, base station belonging to Xiang Suoshu serving cell sends CoMP and measures reported event；In the CoMP measurement
Report event carries neighboring BS information and neighboring area signal strength information.
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| CN109151831B (en) * | 2017-06-27 | 2020-11-10 | 大唐移动通信设备有限公司 | Method and device for allocating resources of serving cell and cooperative cell |
| CN112770339B (en) * | 2019-11-06 | 2022-09-13 | 大唐移动通信设备有限公司 | Cooperative cell determination method and device |
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| CN101888665A (en) * | 2009-05-13 | 2010-11-17 | 普天信息技术研究院有限公司 | Local scheduler-based multi-point cooperative transmission method |
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| US9337906B2 (en) * | 2012-03-30 | 2016-05-10 | Nec Corporation | Feedback and scheduling for coordinated multi-point (CoMP) joint transmission (JT) in orthogonal frequency division multiple access (OFDMA) |
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| CN101888665A (en) * | 2009-05-13 | 2010-11-17 | 普天信息技术研究院有限公司 | Local scheduler-based multi-point cooperative transmission method |
| CN102377462A (en) * | 2010-08-20 | 2012-03-14 | 中兴通讯股份有限公司 | Method and system for interactively selecting auxiliary cell |
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