CN101932080A - Control method, system and device of CoMP (Coordinated Multi-point Transmission/Reception) mode - Google Patents
Control method, system and device of CoMP (Coordinated Multi-point Transmission/Reception) mode Download PDFInfo
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Abstract
The invention provides a control method of a CoMP (Coordinated Multi-point Transmission/Reception) mode, comprising the following steps of: judging whether the CoMP mode is started for user equipment (UE) or not by a service cell; if the service cell judges that the CoMP mode is started fro the UE, issuing measurement configuration information to the UE by the service cell; and receiving measurement report information returned by the UE according to the measurement configuration information and configuring a special CoMP measurement set for the UE according to the measurement report information by the service cell. The control method of the CoMP mode in an LTE-A (Long Term Evolution-Advanced) system can ensure that the on/off of the CoMP mode can be switched according to actual situation, thereby enhancing scheduling flexibility and improving transmission efficiency.
Description
Technical field
The present invention relates to communication technical field, control method, system and the device of particularly a kind of CoMP (Coordinated Multi-point Transmission/Reception, cooperative multipoint transmission/transmission) pattern.
Background technology
Can increase the covering of high data rate in LTE-A (senior Long Term Evolution) system by CoMP transmission and reception technique, improve the throughput of cell edge and/or increase throughput of system.So-called CoMP is meant that the collaborative participation of a plurality of transmission points (being appreciated that into different districts) that separate on the geographical position is to a UE transmitting/receiving data.As shown in Figure 1, be the schematic diagram of three sub-district CoMP transmission in the prior art, wherein three sub-districts can send data simultaneously to a UE in the figure.
The CoMP technology can be divided into descending CoMP and up CoMP, and descending CoMP refers to that a plurality of sub-districts directly or indirectly participate in the downlink data transmission of same UE; Up CoMP refers to that a plurality of sub-districts receive the upstream data of same UE simultaneously, and merges processing by certain technology.Descending CoMP is divided into Combined Treatment (JP, Joint Processing) and coordinated scheduling (CS, Cooperating Scheduling).Under the Combined Treatment mode, can be divided into again: joint transmission and dynamic cell are selected.Joint transmission is meant that a plurality of sub-districts (transmission point) are UE transmission data simultaneously on PDSCH, with the quality that improves the UE received signal and/or eliminate interference from other UE; Dynamic cell selects to be meant that each has only a sub-district (transmission point) constantly is UE transmission data, and this transmission point can be cooperated at CoMP and be concentrated Dynamic Selection.Under the coordinated scheduling mode, has only Serving cell (serving cell, send the sub-district of PDCCH control information for UE) UE to be dispatched and transmits, the phase mutual interference between the different UEs is avoided in the coordination of the resources such as time, frequency, power and space by each minizone.
The shortcoming of prior art is, under connection status, because the signal quality of the Serving cell that UE connected has quality or has big data quantity to transmit, therefore whether UE uses the CoMP pattern to change at any time, yet in the LTE-A system, can not carry out real-time control, promptly can't open CoMP and close between the CoMP and change as required the CoMP pattern.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves in the prior art defective that can not control in real time the CoMP pattern.
For achieving the above object, one aspect of the present invention proposes a kind of control method of coordinate multipoint CoMP pattern, may further comprise the steps: Serving cell judges whether to start the CoMP pattern into user equipment (UE); Start the CoMP pattern if described Serving cell is judged as described UE, then described Serving cell is to described UE sending measuring configuration information; Described Serving cell receives the measurement reporting information that described UE returns according to described measurement configuration information, and measures collection according to the CoMP that described measurement reporting information is described UE configure dedicated.
The present invention also proposes a kind of control system of CoMP pattern on the other hand, comprise Serving cell and UE, described Serving cell, be used to judge whether start the CoMP pattern into user equipment (UE), and be judged as described UE when starting the CoMP pattern, to described UE sending measuring configuration information, and receive the measurement reporting information that described UE returns according to described measurement configuration information, and measure collection according to the CoMP that described measurement reporting information is described UE configure dedicated; Described UE is used for measuring according to described measurement configuration information, and will measure reporting information and send to described Serving cell.
Further aspect of the present invention also proposes a kind of UE, comprises the measurement configuration information receiver module, measures reporting information sending module and CoMP mode control module, and described measurement configuration information receiver module is used to receive the measurement configuration information that Serving cell sends; Described measurement reporting information sending module is used for sending to described Serving cell with measuring the measurement reporting information that obtains; Described CoMP mode control module is used for opening or close described CoMP pattern according to the instruction of described Serving cell.
The present invention also proposes a kind of base station, comprises that judge module, configuration information issue module, measure reporting information receiver module and CoMP mode control module, and described judge module is used to judge whether start the CoMP pattern into UE; Described configuration information issues module, is used for being judged as described UE when starting the CoMP pattern, to described UE sending measuring configuration information; Described measurement reporting information receiver module is used to receive the measurement reporting information that described UE returns according to described measurement configuration information; Described CoMP mode control module, the CoMP that to be used for according to described measurement reporting information be described UE configure dedicated measures collection, opens the CoMP pattern.
The present invention also proposes a kind of control method of CoMP pattern, may further comprise the steps: Serving cell judges whether to close the CoMP pattern of UE; If judge the CoMP pattern of closing described UE, then described Serving cell is deleted variable and the parameter relevant with described UE that described Serving cell is preserved, and notifies described UE.
The present invention proposes the method for control CoMP pattern in the LTE-A system, make and to switch between CoMP pattern On/Off according to actual conditions, strengthened the flexibility of scheduling, improve efficiency of transmission.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the schematic diagram of three sub-district CoMP transmission in the prior art;
Fig. 2 is the flow chart of CoMP pattern of the unlatching UE of the embodiment of the invention one;
Fig. 3 is the flow chart of CoMP pattern of the unlatching UE of the embodiment of the invention two;
Fig. 4 closes CoMP mode method flow chart for the embodiment of the invention four;
Fig. 5 is the control system structure chart of the CoMP pattern of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Following examples of the present invention have proposed multiple unlatching or have closed the method for CoMP pattern, make UE freely to switch opening or close between the CoMP pattern according to actual conditions.Need to prove at this; the embodiment that below opens the CoMP pattern and close the CoMP pattern is applied in any combination mutually; certainly those of ordinary skills can also be according to thought of the present invention; revise or change reaching essentially identical effect not breaking away from the scope of the invention following examples are made, these modifications or change and to be included within protection scope of the present invention with the present invention.
Embodiment one,
In this embodiment, when the UE with CoMP ability is in connection status, if it is low during to a certain degree (predeterminable thresholding) to monitor the signal quality of current service cell, send measurement report to Serving cell, log on is issued for this UE and is configured to enter the CoMP pattern, improves the data transmission quality of this UE or improves throughput.As shown in Figure 2, be the flow chart of the CoMP pattern of the unlatching UE of the embodiment of the invention one, this embodiment may further comprise the steps:
Step S201, when UE was in the non-CoMP pattern, Serving cell disposed first threshold value and corresponding measurement sign to UE.In one embodiment of the invention, for example Serving cell is given UE allocating and measuring incident Event A2, and trigger first threshold value (this threshold value can based on RSRP or RSRQ) of A2 incident according to the startup standard configuration of CoMP, with be connected to the measurement sign that is used for the CoMP purpose, be used to monitor the mass change of current service cell.
Step S202, UE the signal quality of Serving cell drop to this below threshold value after, trigger reporting of this A2 incident, send the measurement report corresponding to Serving cell with measurement event A2, in an example of the present invention, this measurement report can carry measures sign and Serving cell signal quality, can show that like this UE has the CoMP demand, issues corresponding measurement parameter with log on.
Step S203, after Serving cell is received the measurement report corresponding with measurement event A2, judge that this UE need carry out CoMP, issue the periodic measurement configuration to UE, be used to obtain and specify each available cell measurement value under the frequency, for example can adopt RRC to connect reallocation message and send measurement configuration information.
Step S204, after UE received this periodic measurement configuration, all available cell of frequency were measured to joining, and report Serving cell.In one embodiment of the invention, UE also need carry out descending sort according to measured value (signal strength signal intensity/signal quality), and reports Serving cell.
After step S205, Serving cell receive that measurement reports, be the CoMP measurement collection (CoMP measurement set) of UE configure dedicated according to cell list and measurement of correlation amount (measured value).In one embodiment of the invention, collocation method can comprise: when the signal quality of reporting subdistrict satisfies certain thresholding of network settings, add the sub-district to CoMP and measure collection; Because reporting subdistrict is pressed signal quality descending sort, can intercept the top n sub-district, add CoMP to and measure collection; When reporting subdistrict number deficiency N, all reporting subdistricts all add CoMP measurement set to, and wherein the value of N is determined by network based corresponding strategy; Certainly can also be above both be combined into line operate, several sub-districts ordering interceptings that it is good that promptly comprehensive cell signal quality satisfies thresholding assessment and signal quality are assessed.
Embodiment two,
In this embodiment, judge whether to start the CoMP pattern by the size of Serving cell into UE according to the data volume that will send to UE, the UE that promptly ought have the CoMP ability is in connection status, and when Serving cell has the larger data amount to send to UE, give the configuration of UE sending measuring and select CoMP to measure collection, to enter the CoMP pattern, improve the data transmission quality of this UE or improve throughput.As shown in Figure 3, the flow chart for the CoMP pattern of the unlatching UE of the embodiment of the invention two may further comprise the steps:
Step S301 will be after the data volume that UE sends judges that needs are opened the CoMP pattern in basis, and Serving cell directly issues the periodic measurement configuration to UE, is used to obtain each available cell measurement value under the appointment frequency.
After step S302, UE received the configuration of this periodic measurement, all available cell of frequency were measured and are carried out descending sort according to measured value (signal strength signal intensity/signal quality) to joining, and report Serving cell.
After step S303, Serving cell receive that measurement reports, be the CoMP measurement collection (CoMP measurement set) of UE configure dedicated according to cell list and measurement of correlation amount.In one embodiment of the invention, collocation method can comprise: when the signal quality of reporting subdistrict satisfies certain thresholding of network settings, add the sub-district to CoMP and measure collection; Because reporting subdistrict is pressed signal quality descending sort, can intercept the top n sub-district, add CoMP to and measure collection; When reporting subdistrict number deficiency N, all reporting subdistricts all add CoMP measurement set to, and wherein the value of N is determined by network based corresponding strategy; Certainly can also be above both be combined into line operate, several sub-districts ordering interceptings that it is good that promptly comprehensive cell signal quality satisfies thresholding assessment and signal quality are assessed.
Embodiment three,
In the present embodiment, when the UE with CoMP ability is in connection status, and when UE has the larger data amount to send to Serving cell, then UE reports BSR (Buffer Status Report to Serving cell, buffer status report) or send independent RRC (Radio Resource Control, Radio Resource control) message request and enter the CoMP pattern to increase throughput.
Embodiment four,
In this embodiment, proposed to close the method for CoMP pattern, when UE is in the CoMP pattern, when the signal quality that monitors current service cell is higher than certain thresholding, sent measurement report to Serving cell, log on closes the CoMP pattern for this UE.As shown in Figure 4, for the embodiment of the invention four close CoMP mode method flow chart, may further comprise the steps:
Step S401, when UE was in the CoMP pattern, Serving cell disposed second threshold value to UE.In an example of the present invention, for example, Serving cell can be UE allocating and measuring incident Event A1, second threshold value (this threshold value can based on RSRP or RSRQ) that standard configuration triggers the A1 incident of closing according to CoMP, and the measurement sign that is used for the CoMP purpose, be used to monitor the mass change of current service cell.
Step S402, UE the signal quality of Serving cell rise to this more than threshold value after, trigger reporting of this A1 incident, promptly report corresponding measurement report with this measurement event A1, show the demand data that does not adopt CoMP mode service sub-district also can satisfy UE.
After step S403, network receive this measurement report, know that this UE can stop to carry out CoMP, deletion is retained in this UE correlated variables and parameter of network side, and notice UE side stops to safeguard and deletion CoMP correlated variables and parameter.
Embodiment five,
In this embodiment, when UE is in the CoMP pattern, and the data volume that sends to UE of Serving cell closes the CoMP pattern for this UE when dropping to a certain degree.After Serving cell determined that this UE can stop to carry out CoMP, deletion was retained in this UE correlated variables and parameter of network side, and notice UE side stops to safeguard CoMP correlated variables and parameter.
As shown in Figure 5, be the control system structure chart of the CoMP pattern of the embodiment of the invention.This system comprises Serving cell 100 and UE 200.Serving cell 100 is used to judge whether start the CoMP pattern into UE 200, and when being judged as UE 200 startup CoMP patterns, to UE 200 sending measuring configuration informations, and receive the measurement reporting information that UE 200 returns according to measurement configuration information, and be that the CoMP of UE 200 configure dedicated measures collection according to described measurement reporting information.UE 200 is used for measuring according to measurement configuration information, and will measure reporting information and send to described Serving cell.
Wherein, UE 200 comprises measurement configuration information receiver module 210, measures reporting information sending module 220 and CoMP mode control module 230.Measurement configuration information receiver module 210 is used to receive the measurement configuration information that Serving cell 100 sends.Measuring reporting information sending module 220 is used for sending to Serving cell 100 with measuring the measurement reporting information that obtains.CoMP mode control module 230 is used for opening or close the CoMP pattern according to the instruction of Serving cell 100.
Wherein, UE 200 also comprises judge module 240, and judge module 240 is used to judge whether to trigger measurement event.Measure reporting information sending module 220, also be used for after judge module 240 judges to trigger measurement event, measurement sign that will be corresponding with measurement event sends to Serving cell 100.
Wherein, the base station of Serving cell 100 comprises that judge module 110, configuration information issue module 120, measure reporting information receiver module 130 and CoMP mode control module 140.Judge module 110 is used to judge whether start the CoMP pattern into UE 200.Configuration information issues module 120 and is used for when being judged as UE 200 startup CoMP patterns, to UE 200 sending measuring configuration informations.Measure reporting information receiver module 130 and be used to receive the measurement reporting information that UE 200 returns according to measurement configuration information.CoMP mode control module 140 is used for opening the CoMP pattern according to measuring the CoMP measurement collection that reporting information is UE 200 configure dedicated.
In one embodiment of the invention, judge module 110 also is used for measurement report that returns according to UE 200 or the CoMP pattern that judges whether to close UE 200 to the data volume that UE 200 sends.CoMP mode control module 140 also is used for judging when closing the CoMP pattern of UE 200 at judge module 110, deletion Serving cell 100 variable and the parameter relevant that preserve with UE 200, and notify UE 200 to close the CoMP pattern.
In one embodiment of the invention, configuration information issues module 120 and also is used for when UE 200 is in the non-CoMP pattern, to UE 200 configurations first threshold value and the measurement sign that is connected, perhaps to UE 200 configurations second threshold value and the measurement sign that is connected.
The present invention proposes the method for control CoMP pattern in the LTE-A system, make and to switch between CoMP pattern On/Off according to actual conditions, strengthened the flexibility of scheduling, improve efficiency of transmission.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (18)
1. the control method of a coordinate multipoint CoMP pattern is characterized in that, may further comprise the steps:
Serving cell judges whether to start the CoMP pattern into user equipment (UE);
Start the CoMP pattern if described Serving cell is judged as described UE, then described Serving cell is to described UE sending measuring configuration information;
Described Serving cell receives the measurement reporting information that described UE returns according to described measurement configuration information, and measures collection according to the CoMP that described measurement reporting information is described UE configure dedicated.
2. the control method of CoMP pattern as claimed in claim 1 is characterized in that, described Serving cell judges whether to comprise for UE starts the CoMP pattern:
When described Serving cell is in the non-CoMP pattern at described UE, dispose first threshold value and the measurement sign that is connected to described UE;
When described UE when the signal quality of described Serving cell drops to described first threshold value, described UE reports to described Serving cell, request starts described CoMP pattern;
Described Serving cell reports the described UE startup CoMP pattern that is judged as according to described measurement.
3. the control method of CoMP pattern as claimed in claim 1 is characterized in that, described Serving cell judges whether to comprise for UE starts the CoMP pattern:
If described Serving cell has the big data quantity data will send to described UE, and judge to open CoMP and whether can satisfy the transfer of data needs, as judge can satisfy then be as described in UE startup CoMP pattern.
4. the control method of CoMP pattern as claimed in claim 1 is characterized in that, described Serving cell judges whether to comprise for UE starts the CoMP pattern:
If described UE has the big data quantity data to send to described Serving cell, then described UE reports buffer status report BSR or independent radio resource control RRC message request to enter described CoMP pattern to described Serving cell;
Described Serving cell is according to described BSR message or independent RRC message, and judges whether open CoMP can satisfy the transfer of data needs, as judging that can satisfy then is UE startup CoMP pattern.
5. the control method of CoMP pattern as claimed in claim 1 is characterized in that, the CoMP that described Serving cell is described UE configure dedicated according to described measurement reporting information measures collection and comprises:
Select the CoMP that adds described special use to measure the sub-district that collects according to the signal quality in the described measurement reporting information.
6. the control method of CoMP pattern as claimed in claim 1 is characterized in that, also comprises:
Described Serving cell judges whether to close the CoMP pattern of described UE;
If judge the CoMP pattern of closing described UE, then described Serving cell is deleted variable and the parameter relevant with described UE that described Serving cell is preserved, and notifies described UE.
7. the control method of CoMP pattern as claimed in claim 6 is characterized in that, described Serving cell judges whether that the CoMP pattern of closing described UE comprises:
Described Serving cell is that the UE that is in the CoMP pattern disposes second threshold value and the measurement sign that is connected;
When described UE when the signal quality of described Serving cell rises to described second threshold value, described UE reports to described Serving cell, described CoMP pattern is closed in request;
Described Serving cell reports according to described measurement judges the CoMP pattern of closing described UE.
8. the control method of CoMP pattern as claimed in claim 6 is characterized in that, described Serving cell judges whether that the CoMP pattern of closing described UE comprises:
The data volume of transmission data judges whether to close the CoMP pattern of described UE between described Serving cell basis and the described UE.
9. the control system of a CoMP pattern is characterized in that, comprises Serving cell and UE,
Described Serving cell, be used to judge whether start the CoMP pattern into user equipment (UE), and be judged as described UE when starting the CoMP pattern, to described UE sending measuring configuration information, and receive the measurement reporting information that described UE returns according to described measurement configuration information, and measure collection according to the CoMP that described measurement reporting information is described UE configure dedicated;
Described UE is used for measuring according to described measurement configuration information, and will measure reporting information and send to described Serving cell.
10. a UE is characterized in that, comprise the measurement configuration information receiver module, measure reporting information sending module and CoMP mode control module,
Described measurement configuration information receiver module is used to receive the measurement configuration information that Serving cell sends;
Described measurement reporting information sending module is used for sending to described Serving cell with measuring the measurement reporting information that obtains;
Described CoMP mode control module is used for opening or close described CoMP pattern according to the instruction of described Serving cell.
11. UE as claimed in claim 10 is characterized in that, also comprises judge module,
Described judge module is used to judge whether to trigger measurement event;
Described measurement reporting information sending module also is used for after described judge module judges to trigger measurement event the measurement report corresponding with described measurement event being sent to described Serving cell.
12. a base station is characterized in that, comprises that judge module, configuration information issue module, measure reporting information receiver module and CoMP mode control module,
Described judge module is used to judge whether start the CoMP pattern into UE;
Described configuration information issues module, is used for being judged as described UE when starting the CoMP pattern, to described UE sending measuring configuration information;
Described measurement reporting information receiver module is used to receive the measurement reporting information that described UE returns according to described measurement configuration information;
Described CoMP mode control module, the CoMP that to be used for according to described measurement reporting information be described UE configure dedicated measures collection, opens the CoMP pattern.
13. base station as claimed in claim 12 is characterized in that, described judge module also is used for the CoMP pattern that measurement report that returns according to described UE or the data volume of sending for described UE judge whether to close described UE;
Described CoMP mode control module also is used for deleting variable and the parameter relevant with described UE that described Serving cell is preserved, and notifying described UE to close described CoMP pattern when the CoMP pattern of described UE is closed in described judge module judgement.
14. base station as claimed in claim 12, it is characterized in that described configuration information issues module, also be used for when described UE is in the non-CoMP pattern, dispose first threshold value and the measurement sign that is connected to described UE, perhaps dispose second threshold value and the measurement sign that is connected to described UE.
15. the control method of a CoMP pattern is characterized in that, may further comprise the steps:
Serving cell judges whether to close the CoMP pattern of UE;
If judge the CoMP pattern of closing described UE, then described Serving cell is deleted variable and the parameter relevant with described UE that described Serving cell is preserved, and notifies described UE.
16. the control method of CoMP pattern as claimed in claim 15 is characterized in that, also comprises:
Described Serving cell judges whether to start the CoMP pattern into described UE;
Start the CoMP pattern if described Serving cell is judged as described UE, then described Serving cell is to described UE sending measuring configuration information;
Described Serving cell receives the measurement reporting information that described UE returns according to described measurement configuration information, and measures collection according to the CoMP that described measurement reporting information is described UE configure dedicated.
17. the control method of CoMP pattern as claimed in claim 15 is characterized in that, described Serving cell judges whether that the CoMP pattern of closing described UE comprises:
Described Serving cell is that the UE that is in the CoMP pattern disposes second threshold value and the measurement sign that is connected;
When described UE when the signal quality of described Serving cell rises to described second threshold value, described UE reports to described Serving cell, described CoMP pattern is closed in request;
Described Serving cell reports according to described measurement judges the CoMP pattern of closing described UE.
18. the control method of CoMP pattern as claimed in claim 15 is characterized in that, described Serving cell judges whether that the CoMP pattern of closing described UE comprises:
The data volume of transmission data judges whether to close the CoMP pattern of described UE between described Serving cell basis and the described UE.
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