CN101873643A - Method and system for realizing multi-point cooperative transmission - Google Patents
Method and system for realizing multi-point cooperative transmission Download PDFInfo
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Abstract
The embodiment of the invention discloses a method for realizing multi-point cooperative transmission. The method comprises the following steps of: presetting a cell for showing the multi-point cooperative transmission capacity in an X2 interface message; interacting the multi-point cooperative transmission capacity among each evolved node B (ENB) through the X2 interface message; and finally according to the multi-point cooperative transmission capacity adjacent to the ENB determined in the interacting process, determining a multi-point cooperative transmission report set of user equipment (UE), which each ENB serves for, by using each ENB. The embodiment of the invention discloses a system for realizing the multi-point cooperative transmission. Due to the application of the method and the system, the multi-point cooperative transmission can be realized rapidly and effectively.
Description
Technical field
The present invention relates to the multi-point cooperative transmission technology, particularly a kind of method and system that realize multi-point cooperative transmission.
Background technology
In LTE-A, multi-point cooperative transmission (COMP, Coordinated Multi-point transmission/reception) technology has been proposed.The COMP technology is meant: the collaborative transmitting/receiving data that participates in a user terminal (UE) of a plurality of transmission points that separate on the geographical position, and to improve the received signal quality of edge customer.COMP is divided into combined dispatching and unites the transmission dual mode:
In the combined dispatching mode, have only a transmission point to UE transmission data, the mode by scheduling between the collaborative transmission point is that different UE distributes mutually orthogonal resource, the interference that control UE is subjected to.
In the associating send mode, a plurality of transmission points strengthen the quality of UE received signal simultaneously to UE transmission data.
Under the dual mode, the several sub-districts that participate in COMP can belong to same evolution base station (ENB), also can belong to different ENB respectively in the above.Via node (relay node) also can participate in the COMP transmission.
To work in coordination with transmission to UE, the Serving cell of this UE must know whether the transmission point that participates in multi-point cooperative transmission has the ability of collaborative transmission, set with the sub-district of determining to carry out multi-point cooperative transmission, therefore, the Serving cell of UE need know whether adjacent sub-district has the ability of multi-point cooperative transmission.But, do not exist in the prior art to make ENB determine whether adjacent sub-district has the technical scheme of multi-point cooperative transmission ability, cause multi-point cooperative transmission to carry out quickly and efficiently.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of method that realizes multi-point cooperative transmission, and this method can realize multi-point cooperative transmission quickly and efficiently according to the multi-point cooperative transmission ability of the adjacent area of determining.
The embodiment of the invention also provides a kind of system that realizes multi-point cooperative transmission, and this system can realize multi-point cooperative transmission quickly and efficiently.
In a kind of method that realizes multi-point cooperative transmission that the embodiment of the invention provides, be provided for representing the cell of multi-point cooperative transmission ability in advance in X2 interface message, this method also comprises:
Between A, each evolution base station ENB by described X2 interface interacting message multi-point cooperative transmission ability each other;
B, each ENB determine the multi-point cooperative transmission report collection of the user terminal UE that each ENB serves according to the multi-point cooperative transmission ability of determined contiguous ENB in the described reciprocal process.
In a kind of system that realizes multi-point cooperative transmission that the embodiment of the invention provides, comprise at least two evolution base station ENB, wherein:
Between each ENB by setting in advance the X2 interface interacting message multi-point cooperative transmission ability each other of the cell that is useful on expression multi-point cooperative transmission ability;
Described each ENB also is used for the multi-point cooperative transmission ability according to the determined contiguous ENB of described reciprocal process, determines the multi-point cooperative transmission report collection of the user terminal UE that each ENB serves.
As seen from the above technical solution, the method and system of the realization multi-point cooperative transmission that the embodiment of the invention provides, by in X2 interface message, being provided for representing the cell of multi-point cooperative transmission ability in advance, and by each ENB by X2 interface interacting message multi-point cooperative transmission ability each other, last each ENB is according to the multi-point cooperative transmission ability of determined contiguous ENB in the reciprocal process, determine the multi-point cooperative transmission report collection of the UE that each ENB serves, thereby the transmission point of having avoided working in coordination with transmission is included in the multi-point cooperative transmission report of UE and concentrates, fast, realized multi-point cooperative transmission effectively.
Description of drawings
Fig. 1 is that the X2 interface of a success is set up the process schematic diagram;
Fig. 2 is the ENB config update process schematic diagram of a success;
Fig. 3 realizes the schematic flow sheet of the method for multi-point cooperative transmission for the present invention;
Fig. 4 is a method schematic diagram of realizing multi-point cooperative transmission in one embodiment of the invention;
Fig. 5 realizes the composition structural representation of the system of multi-point cooperative transmission for the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In the X2 interface agreement, defined the correlated process of carrying out information interaction between the ENB by X2 interface message.For example: defined the process of setting up of X2 interface between the ENB, this process is used for the application layer data between mutual two ENB.Fig. 1 is that the X2 interface of a success is set up the process schematic diagram.ENB among Fig. 1
1And ENB
2Represent two different ENB, X2 interface shown in Figure 1 is set up process and is comprised:
Step 101:ENB
1To ENB
2Send X2 and set up request (X2 SETUP REQUEST) message.
Wherein, the cell (IE) in the X2 SETUP REQUEST message is provided with as shown in table 1:
Table 1
Step 102:ENB
2To ENB
1Return X2 and set up response (X2 SETUP RESPONSE) message.
In X2 SETUP RESPONSE message, except comprising IE as shown in table 1, also comprise an additional key diagnosis (Criticality Diagnostics) IE, this IE is used in reference to the wrong or inapprehensible information that whether is shown in the X2SETUP REQUEST message.
If the application layer data of ENB changes, will notify adjacent sub-district by ENB config update (ENB CONFIGURATION UPDATE) process.Fig. 2 is the ENB config update process schematic diagram of a success, and this process comprises:
Step 201:ENB
1To ENB
2Send ENB CONFIGURATION UPDATE message.
Wherein, the IE in the ENB CONFIGURATION UPDATE message is provided with as shown in table 2:
Table 2
Step 202:ENB
2To ENB
1Return the ENB config update and confirm (ENB CONFIGURATION UPDATE ACKNOWLEDGE) message.
The main thought of the embodiment of the invention is the X2 interface that utilizes between the ENB, mutual multi-point cooperative transmission ability each other between ENB, so that each ENB is known the multi-point cooperative transmission ability of its contiguous ENB, thereby the Serving cell of avoiding UE can not be worked in coordination with the transmission point of transmission and will be included in the multi-point cooperative transmission report collection (COMP reporting set), so that more effectively and promptly realize multi-point cooperative transmission.
Fig. 3 realizes the schematic flow sheet of the method for multi-point cooperative transmission for the present invention.Referring to Fig. 3, this method comprises:
Step 301: the cell that in X2 interface message, is provided for representing the multi-point cooperative transmission ability in advance.
Preferably, can set up request message and X2 sets up the cell that is provided for representing the multi-point cooperative transmission ability in the response message at X2.This cell can be set to represent the multi-point cooperative transmission ability of ENB level, also can be set to represent the multi-point cooperative transmission ability of sub-district (cell) level, certainly, can also be set to represent the multi-point cooperative transmission ability of via node.Particularly:
1) when the multi-point cooperative transmission ability is the ENB level, being provided in X2 interface message in advance in this step represents that the cell of multi-point cooperative transmission ability is: set up request message and X2 at X2 in advance and set up and increase by one in the response message to the equal effective cell in all sub-districts under the ENB, this cell is used to represent the multi-point cooperative transmission ability of all sub-districts under this ENB.Associative list 1 can increase a COMP Availability IE on the basis that cell shown in the table 1 is provided with, represent the multi-point cooperative transmission ability of all sub-districts under this ENB with the value of this IE.For example: suppose that this IE value is that all sub-districts all possess the multi-point cooperative transmission ability under 1 this ENB of expression, this IE value is that all sub-districts all do not possess the multi-point cooperative transmission ability under 0 this ENB of expression.
2) when the multi-point cooperative transmission ability is cell-level, being provided in X2 interface message in advance in this step represents that the cell of multi-point cooperative transmission ability is: setting up in service cell information (the Served Cell Information) cell that request message and X2 set up response message at X2 in advance increases a cell, and this cell is used to represent the multi-point cooperative transmission ability of each pairing sub-district of service cell information cell.Associative list 1, be exactly under the Cell of Served shown in the table 1 Information IE, to increase a COMPAvailability IE, in this case, each COMP Availability IE represents the multi-point cooperative transmission ability of the pairing sub-district of Served Cell Information IE, its place.
3) when the multi-point cooperative transmission ability is the multi-point cooperative transmission ability of via node, being provided in X2 interface message in advance in this step represents that the cell of multi-point cooperative transmission ability is: set up request message and X2 at X2 in advance and set up and increase the cell at the via node under the ENB in the response message, this cell is used to represent the multi-point cooperative transmission ability of the via node under this ENB.
Step 302: pass through X2 interface interacting message multi-point cooperative transmission ability each other between each ENB.
What integrating step 301 was carried out sets in advance, in this step, can himself multi-point cooperative transmission ability be carried on the X2 that sets in advance COMP Availability IE by one or more ENB sets up in the request message, and this X2 is set up request message send to each contiguous ENB, so, each contiguous ENB has known that this X2 sets up the multi-point cooperative transmission ability of the pairing ENB of request message; Then, each contiguous ENB is carried on the X2 that sets in advance COMPAvailability IE with himself multi-point cooperative transmission ability and sets up in the response message, return to and send the ENB that X2 sets up request message, thereby make the multi-point cooperative transmission ability that ENB that X2 sets up request message is known each contiguous ENB of sending.
Step 303: each ENB determines the multi-point cooperative transmission report collection of the UE that each ENB serves according to the multi-point cooperative transmission ability of determined contiguous ENB in the reciprocal process.
Mutual by step 302, each ENB have been preserved the information whether each adjacent area possesses the multi-point cooperative transmission ability in neighboring BS relationship, thereby, can determine the multi-point cooperative transmission report collection of UE in this step according to the multi-point cooperative transmission ability of each adjacent area.
Certainly, in actual applications, only determine that according to this factor of multi-point cooperative transmission ability of each adjacent area the multi-point cooperative transmission report collection of UE is not enough, also need take all factors into consideration the measurement reporting information etc. of UE and determine.Just because the present invention is absorbed in the influence of the multi-point cooperative transmission ability of each adjacent area to the multi-point cooperative transmission report collection of UE, therefore, in the description of the invention process, the measurement reporting information of UE etc. is not elaborated.
In this step, determine that the process of the multi-point cooperative transmission report collection of UE illustrates as follows:
If certain adjacent sub-district has the ability of multi-point cooperative transmission, when determining the multi-point cooperative transmission report collection of UE, can select or not select this sub-district to the measurement result and the decision of other relevant informations of measuring collection (measurement set) according to UE.If multi-point cooperative transmission can not be carried out in certain adjacent sub-district, so,, can not consider that the multi-point cooperative transmission report that this sub-district is included in this UE concentrates even the signal quality of this sub-district that UE reports is fine.
As seen from the above-described embodiment, the method of the realization multi-point cooperative transmission that the embodiment of the invention provides, by in X2 interface message, being provided for representing the cell of multi-point cooperative transmission ability in advance, and by each ENB by X2 interface interacting message multi-point cooperative transmission ability each other, last each ENB is according to the multi-point cooperative transmission ability of determined contiguous ENB in the reciprocal process, determine the multi-point cooperative transmission report collection of the UE that each ENB serves, thereby the transmission point of having avoided working in coordination with transmission is included in the multi-point cooperative transmission report of UE and concentrates, fast, realized multi-point cooperative transmission effectively.
On the basis of technique scheme, when the present invention also provides a kind of multi-point cooperative transmission ability at ENB to change, notify the technical scheme of each contiguous ENB with this change, so that each ENB can in time obtain the adjacent area multi-point cooperative transmission ability of renewal.
At first, in the ENB configuration update message, be provided for representing the cell of multi-point cooperative transmission ability in advance, then, when the multi-point cooperative transmission ability of ENB changes, multi-point cooperative transmission ability after ENB changes it is carried in the above-mentioned cell of ENB configuration update message, sends to each contiguous ENB; Each contiguous ENB upgrades the multi-point cooperative transmission ability of this ENB according to the above-mentioned cell of the ENB configuration update message that receives.Similar with above-mentioned steps 301:
1) when the multi-point cooperative transmission ability is the ENB level, can in the ENB configuration update message, increase by one in advance to all effective cell in all sub-districts under the ENB, this cell is used to represent the multi-point cooperative transmission ability of all sub-districts under this ENB.Associative list 2 can increase a COMP Availability IE on the basis that cell shown in the table 2 is provided with, represent the multi-point cooperative transmission ability of all sub-districts under this ENB with the value of this IE.For example: suppose that this IE value is that all sub-districts all possess the multi-point cooperative transmission ability under 1 this ENB of expression, this IE value is that all sub-districts all do not possess the multi-point cooperative transmission ability under 0 this ENB of expression.
2) when the multi-point cooperative transmission ability is cell-level, can be in advance in the Serving cell cell that will revise of ENB configuration update message, increase a cell, the multi-point cooperative transmission ability of the pairing sub-district of Serving cell cell that this cell is used to represent that each will be revised.Associative list 2, be exactly under the Cell of Served shown in the table 2 To Modify IE, to increase a COMP Availability IE, in this case, each COMP Availability IE represents the multi-point cooperative transmission ability of the pairing sub-district of Served Cell To Modify IE, its place.
3) when the multi-point cooperative transmission ability is the multi-point cooperative transmission ability of via node, can increase the cell at the via node under the ENB in advance in the ENB configuration update message, this cell is used to represent the multi-point cooperative transmission ability of the via node under this ENB.
Fig. 4 is a method schematic diagram of realizing multi-point cooperative transmission in one embodiment of the invention.Among Fig. 4, ENB
1And ENB
2Represent two different ENB, RN
1Be ENB
1Under via node, RN
2Be ENB
2Under via node.In the method shown in Figure 4, ENB
1And ENB
2Adopt said method provided by the invention to via node RN under it
1And RN
2The multi-point cooperative transmission ability carry out alternately, in the present embodiment, because RN
1And RN
2All possess the multi-point cooperative transmission ability, under the situation that other correlated conditions meet, RN
1And RN
2All will participate in the multi-point cooperative transmission of UE shown in the figure.
Corresponding to said method, the present invention also provides a kind of system that realizes multi-point cooperative transmission.Fig. 5 realizes the composition structural representation of the system of multi-point cooperative transmission for the present invention.Referring to Fig. 5, comprise at least two ENB in this system, as figure ENB
1, ENB
2... ENB
nShown in.Among Fig. 5:
Between each ENB by setting in advance the X2 interface interacting message multi-point cooperative transmission ability each other of the cell that is useful on expression multi-point cooperative transmission ability;
And each ENB is used for the multi-point cooperative transmission ability according to the determined contiguous ENB of this reciprocal process, determines the multi-point cooperative transmission report collection of the UE that each ENB serves.
Preferably, this X2 interface message can for: X2 sets up request message and X2 sets up response message; At this moment, can its multi-point cooperative transmission ability be carried on X2 by one or more ENB sets up in the above-mentioned cell that sets in advance of request message, and this X2 is set up request message send to each contiguous ENB, so, each contiguous ENB has known that this X2 sets up the multi-point cooperative transmission ability of the pairing ENB of request message; Then, each contiguous ENB is carried on the X2 that sets up request message corresponding to this X2 with its multi-point cooperative transmission ability and sets up in the above-mentioned cell that sets in advance of response message, return to and send the ENB that X2 sets up request message, thereby make the multi-point cooperative transmission ability that ENB that X2 sets up request message is known each contiguous ENB of sending.
Further, each ENB can notify other ENB with the change of its multi-point cooperative transmission ability.When specific implementation, the ENB that the multi-point cooperative transmission ability changes is used for the multi-point cooperative transmission ability after its change is carried on the ENB configuration update message that sets in advance the cell that is useful on expression multi-point cooperative transmission ability, sends to each contiguous ENB; Each contiguous ENB is used for the described cell according to the ENB configuration update message that receives, and upgrades the multi-point cooperative transmission ability of corresponding ENB.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a method that realizes multi-point cooperative transmission is characterized in that, is provided for representing the cell of multi-point cooperative transmission ability in advance in X2 interface message, and this method also comprises:
Between A, each evolution base station ENB by described X2 interface interacting message multi-point cooperative transmission ability each other;
B, each ENB determine the multi-point cooperative transmission report collection of the user terminal UE that each ENB serves according to the multi-point cooperative transmission ability of determined contiguous ENB in the described reciprocal process.
2. method according to claim 1 is characterized in that:
Described X2 interface message is: X2 sets up request message and X2 sets up response message;
Described A comprises: ENB is carried on described X2 with its multi-point cooperative transmission ability and sets up in the described cell of request message, and described X2 is set up request message sends to each contiguous ENB; Described each contiguous ENB is carried on the X2 that sets up request message corresponding to described X2 with its multi-point cooperative transmission ability and sets up in the described cell of response message and return to described ENB.
3. method according to claim 2 is characterized in that:
This method further comprises: the cell that is provided for representing the multi-point cooperative transmission ability in advance in the ENB configuration update message;
When the multi-point cooperative transmission ability of ENB changed, this method further comprised: the multi-point cooperative transmission ability after ENB changes it is carried in the described cell of described ENB configuration update message, sends to each contiguous ENB; Described each contiguous ENB upgrades the multi-point cooperative transmission ability of described ENB according to the described cell of described ENB configuration update message.
4. according to claim 2 or 3 described methods, it is characterized in that:
Described multi-point cooperative transmission ability is the ENB level;
Describedly be provided in X2 interface message in advance representing that the cell of multi-point cooperative transmission ability is: set up request message and X2 at X2 in advance and set up and increase by one in the response message to the equal effective cell in all sub-districts under the ENB, this cell is used to represent the multi-point cooperative transmission ability of all sub-districts under the described ENB;
Describedly be provided in the ENB configuration update message in advance representing that the cell of multi-point cooperative transmission ability is: increase by one in advance to the equal effective cell in all sub-districts under the ENB in the ENB configuration update message, this cell is used to represent the multi-point cooperative transmission ability of all sub-districts under the described ENB.
5. according to claim 2 or 3 described methods, it is characterized in that:
Described multi-point cooperative transmission ability is a cell-level;
Described being provided in X2 interface message in advance represents that the cell of multi-point cooperative transmission ability is: setting up in the service cell information cell that request message and X2 set up response message at X2 in advance increases a cell, and this cell is used to represent the multi-point cooperative transmission ability of each pairing sub-district of service cell information cell;
Describedly be provided in the ENB configuration update message in advance representing that the cell of multi-point cooperative transmission ability is: in the Serving cell cell that will revise of ENB configuration update message, increase a cell in advance, the multi-point cooperative transmission ability of the pairing sub-district of Serving cell cell that this cell is used to represent that each will be revised.
6. according to claim 2 or 3 described methods, it is characterized in that:
The multi-point cooperative transmission ability that described multi-point cooperative transmission ability is a via node;
Described being provided in X2 interface message in advance represents that the cell of multi-point cooperative transmission ability is: set up cell of middle increase that request message and X2 set up response message at X2 in advance, this cell is used to represent the multi-point cooperative transmission ability of the via node under the described ENB;
Describedly be provided in the ENB configuration update message in advance representing that the cell of multi-point cooperative transmission ability is: increase a cell in advance in the ENB configuration update message, this cell is used to represent the multi-point cooperative transmission ability of the via node under the described ENB.
7. a system that realizes multi-point cooperative transmission comprises at least two evolution base station ENB, it is characterized in that:
Between each ENB by setting in advance the X2 interface interacting message multi-point cooperative transmission ability each other of the cell that is useful on expression multi-point cooperative transmission ability;
Described each ENB also is used for the multi-point cooperative transmission ability according to the determined contiguous ENB of described reciprocal process, determines the multi-point cooperative transmission report collection of the user terminal UE that each ENB serves.
8. system according to claim 7 is characterized in that:
Described X2 interface message is: X2 sets up request message and X2 sets up response message;
Described ENB is used for its multi-point cooperative transmission ability is carried on the described cell that X2 sets up request message, and described X2 is set up request message sends to each contiguous ENB;
Described each contiguous ENB is used for that its multi-point cooperative transmission ability is carried on the described cell that the X2 that sets up request message corresponding to described X2 sets up response message and returns to described ENB.
9. system according to claim 8 is characterized in that:
Described ENB also is used for when its multi-point cooperative transmission ability changes, and the multi-point cooperative transmission ability after it is changed is carried in the ENB configuration update message that sets in advance the cell that is useful on expression multi-point cooperative transmission ability, sends to each contiguous ENB;
Described each contiguous ENB also is used for the described cell according to the described ENB configuration update message that receives, and upgrades the multi-point cooperative transmission ability of corresponding ENB.
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| CN104041112A (en) * | 2012-12-26 | 2014-09-10 | 华为技术有限公司 | Inter-base-station Cooperation Method, Base Station And Operation And Management System |
| WO2014101015A1 (en) * | 2012-12-26 | 2014-07-03 | 华为技术有限公司 | Inter-base-station cooperation method, base station and operation and management system |
| CN104041112B (en) * | 2012-12-26 | 2019-03-29 | 华为技术有限公司 | Method, base station and the operational administrative system of cooperation between base stations |
| CN103561481A (en) * | 2013-11-14 | 2014-02-05 | 华为技术有限公司 | Self-establishing method and device for X2 interfaces |
| CN115801206A (en) * | 2021-09-09 | 2023-03-14 | 成都极米科技股份有限公司 | Multi-point cooperative transmission method, device, equipment and storage medium |
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| CN101873643B (en) | 2012-12-12 |
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