CN101784091B - Switching control method and system - Google Patents
Switching control method and system Download PDFInfo
- Publication number
- CN101784091B CN101784091B CN200910076803.4A CN200910076803A CN101784091B CN 101784091 B CN101784091 B CN 101784091B CN 200910076803 A CN200910076803 A CN 200910076803A CN 101784091 B CN101784091 B CN 101784091B
- Authority
- CN
- China
- Prior art keywords
- cooperative
- user terminal
- current
- service node
- original
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a switching control method, comprising the following steps: cooperating with anchor points to make a decision for different cooperation conditions of user terminal from original service node to target service node, and correspondingly performing switching control operation based on the judgment that whether the original service node can continuously provide service for the current user terminal. The invention further discloses a switching control system, comprising a choice implementation unit and a control implementation unit, wherein the control implementation unit is used for correspondingly performing switching control operation based on the judgment that the original service node can continuously provide service for the current user terminal. The application of the method and the system can realize switching control in multi-point synergistic transmission when the user terminal is moved, thereby ensuring that the user terminal after switching can obtain performance gain.
Description
Technical Field
The present invention relates to a handover control technology, and in particular, to a handover control method and system in coordinated multipoint transmission.
Background
With the requirement of the LTE-a (Long-Term Evolution Advanced) system, the average spectrum efficiency and the edge spectrum efficiency of a cell are more and more important, and the edge spectrum efficiency of the cell is the most concerned, in comparison, the uplink and downlink of the LTE-a system are both Orthogonal Frequency Division Multiplexing (OFDM) or Frequency Division Multiplexing (CDMA) based on some deformation of OFDM, which is different from the conventional CDMA based wireless communication system, the LTE-a system does not have processing gain, and the inside of the cell is completely Frequency-Division Orthogonal, so there is almost no interference problem, but the interference processing at the edge of the cell is relatively troublesome. Because the antenna distances between the user terminal at the edge of the cell and the adjacent cells are not different greatly, when only one cell uses multiple antennas to provide service for the user terminal at the edge of the cell, the adjacent cell adjacent to the current cell can become an interference cell, therefore, the user terminal at the edge of the cell is most susceptible to interference and the performance is affected.
It is in this context that multipoint coordinated transmission techniques are proposed. Fig. 1 is a schematic diagram of coordinated multi-point transmission in which a ue is cooperatively served by multiple cells after the coordinated multi-point transmission technique is adopted. As shown in fig. 1, base station 11, base station 12, and base station 13 are located in different cells, and three nodes, base station 11, base station 12, and base station 13, collectively provide service for user terminal 21. Therefore, the multi-point cooperative transmission technology uses different antennas of a plurality of cells to provide service for the user terminals at the edge of the cells simultaneously, so that the interference among the cells is avoided, and meanwhile, the multi-antenna technology is adopted, so that the information of increasing the space dimension of the multi-antenna can be fully exerted, and the capacity and the performance of the system are greatly improved. Certainly, the coordinated multi-point transmission technology is not limited to the cells, and can also be used in the cells, because the transmission of the user terminal information is spatially dispersed into a plurality of transmission points, and the transmission points are matched with each other, the optimal configuration of power, frequency and spatial resources can be realized, so that the interference can be suppressed, and the reliable and high-capacity link performance can be realized.
In the multi-point cooperative transmission, a plurality of nodes cooperate to serve the user terminal, and compared with a single service cell, certain complexity is brought to the mobility of the user terminal. Specifically, the conventional mobile solution in the case of a single serving cell is: after the user terminal in the connected state moves, a handover process controlled by the network side and assisted by the user terminal side needs to be performed. When a certain trigger condition is met, such as periodic or aperiodic event trigger, the ue sends a measurement report to the original serving cell according to system information and rules, and the original serving cell performs handover decision according to the measurement report and Radio Resource Management (RRM) information to decide whether to handover the ue to a target cell. If the original serving cell judges that the user terminal needs to be initiated to be switched and the target cell finishes the switching preparation, the original serving cell sends a switching command to the user terminal, and after the user terminal is successfully switched to the target cell, the link between the original serving cell and the original serving cell is released, so that the target cell provides service for the user terminal completely. However, for the ue cooperatively served by multiple cells in the coordinated multi-point transmission, the mobility becomes complicated. After the multi-point cooperative transmission technology is adopted, an original service cell before the user terminal moves and a target service cell after the user terminal moves may be in the same cooperative group, and the user terminal is linked with the original service cell and the target service cell before and after the user terminal moves. It can be seen that, in this case, if the handover in the conventional sense is still initiated according to the conventional mobile solution of the single serving cell, not only the resources of the original serving cell, the target cell, the core network side and the user terminal are consumed, but also the user terminal cannot obtain the performance gain after the handover. At present, no solution exists for the problem of handover control when a user terminal moves in coordinated multipoint transmission.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a handover control method and system, which can implement handover control for a ue moving in coordinated multipoint transmission, reduce the consumption of resources of the original serving cell, the target cell, the core network side and the ue, and ensure that the ue after handover can obtain performance gain after the coordinated multipoint transmission technique is adopted.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of handover control, the method comprising: and the cooperative anchor point makes a decision on different cooperative conditions after the user terminal moves from the original service node to the target service node, and correspondingly executes switching control operation based on the judgment on whether the original service node can continuously provide service for the current user terminal.
Wherein, before deciding and controlling the coordination situation of the user terminal after moving, the coordination anchor point further comprises: and the original service node selects the target service node according to the measurement report reported by the user terminal.
Wherein, the current user terminal is a collaborative user terminal, and the current collaborative situation is: after the cooperative user terminal moves, the original cooperative group still provides service for the cooperative user terminal, and the original service node is a member of the original cooperative group; the cooperative anchor point judges that the original service node can continue to provide service for the current user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
Wherein, the current user terminal is a collaborative user terminal, and the current collaborative situation is: after the cooperative user terminal moves, a new cooperative group provides service for the cooperative user terminal, and the new cooperative group still comprises the original service node; the cooperative anchor point judges that the original service node can continue to provide service for the current user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
Wherein, the current user terminal is a collaborative user terminal, and the current collaborative situation is: after the cooperative user terminal moves, a new cooperative group provides service for the cooperative user terminal, and the new cooperative group does not include the original service node; the cooperative anchor point judges that the original service node can not continuously provide service for the current user terminal, and correspondingly executed switching control operations are as follows: the handover is performed.
Wherein, the current cooperation condition is: after the cooperative user terminal moves, the current user terminal is changed from the cooperative user terminal to a non-cooperative user terminal, and the original service node can continue to provide service for the non-cooperative user terminal; the cooperative anchor point judges that the original service node can continue to provide service for the current user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
And the cooperative anchor point is a node for realizing decision judgment and control in the cooperative group.
Wherein the method further comprises deployment processing of the cooperative group, the deployment processing of the cooperative group comprising: at least two nodes form a cooperative group, and provide coordinated multi-point transmission service for cooperative user terminals together, and the nodes belonging to at least one cooperative group exist at the same time.
A handover control system, the system comprising: a selection realization unit and a control realization unit; wherein,
a selection realization unit, which is used for the original service node to select the target service node according to the measurement report reported by the current user terminal;
and the control realization unit is used for correspondingly executing switching control operation based on the judgment of whether the original service node can continuously provide service for the current user terminal.
The control implementation unit further includes a decision implementation module, configured to implement decision for different coordination situations after the current user terminal moves from the original service node to the target service node by using the coordination anchor point.
The cooperative anchor point of the invention makes a decision on different cooperative conditions after the user terminal moves from the original service node to the target service node, and correspondingly executes the switching control operation based on the judgment of whether the original service node can continuously provide services for the current user terminal.
By adopting the invention, as long as the original service node can continue to provide service for the current user terminal after the user terminal is judged to move, the user terminal is not initiated to be switched. By the switching control, the multi-point cooperative transmission technology can be fully utilized, unnecessary frequent switching is reduced, and the integration of the multi-point cooperative transmission technology and the switching control is realized. The mobility management of the user terminal is well combined with the multipoint cooperative transmission technology, and the mobility problem of the user terminal is solved while good performance gain is brought to the cooperative user terminal by adopting the multipoint cooperative transmission technology.
Drawings
Fig. 1 is a schematic diagram of coordinated multi-point transmission in which a ue is cooperatively served by multiple cells;
FIG. 2 is a schematic flow chart of the implementation of the method of the present invention;
fig. 3 is a schematic diagram illustrating coverage, service range and ue mobile location of a cooperative group in an embodiment;
FIG. 4 is a schematic diagram of the system of the present invention.
Detailed Description
The basic idea of the invention is: and as long as the original service node can continue to provide service for the current user terminal after the user terminal moves according to the judgment of the cooperative anchor point, switching control is not initiated for the user terminal. By the switching control, the multi-point cooperative transmission technology can be fully utilized, unnecessary frequent switching is reduced, and the integration of the multi-point cooperative transmission technology and the switching control is realized.
The following describes the embodiments in further detail with reference to the accompanying drawings.
The following describes the prior art and the present invention in comparison to better appreciate the advantages of the present invention over the prior art.
After the multipoint cooperative transmission technology is adopted, the mobility problem of cooperative users becomes complex, and no solution exists for the switching control problem when the user terminal moves. When a user terminal is cooperatively served by a plurality of cells, if the conventional handover control method of handing over a user to a target serving cell after the target serving cell is selected is adopted, there are the following problems.
On the one hand, in the coordinated multi-point transmission, when the ue moves from one serving cell, i.e. the original serving cell, to another serving cell, i.e. the target serving cell, from the geographical location, the ue does move between the cells, and if the ue should disconnect from the original serving cell according to the existing handover control method, the ue is handed over from the original serving cell to the target serving cell. However, after the multi-point cooperative transmission technique is adopted, the original serving cell before the user terminal moves and the target serving cell after the user terminal moves may be in the same cooperative group, and then, links are established between the user terminal and all cells in the cooperative group before and after the user terminal moves, that is, before and after the user terminal moves, the user terminal is linked with the original serving cell and the target serving cell. It can be seen that, in this case, if the existing handover control method is adopted, not only the resources of the original serving cell, the target cell, the core network side and the ue are consumed, but also the ue after handover cannot obtain performance gain.
On the other hand, in the coordinated multi-point transmission, a plurality of nodes form a coordinated group to cooperatively provide services for the user terminal. Here, the user terminals served by the cooperative group may be referred to as cooperative user terminals, and accordingly, the user terminals served by a single cell may be referred to as non-cooperative user terminals. The system determines whether the user terminal is a cooperative user terminal or a non-cooperative user terminal according to the channel condition from the user terminal to the adjacent node, system resources and the like. The movement of the cooperative user terminal not only brings about the possibility of handover but also brings about the possibility of updating the cooperative group. Specifically, as the location of the cooperative ue moves, the channel condition to each node in the cooperative group changes, the cooperative transmission to the ue may change after the movement, and the original cooperative group may still serve the cooperative ue after the movement, or a new cooperative group may need to serve the cooperative ue, or the cooperative ue may no longer need to be served by the cooperative ue, and thus the cooperative ue becomes a non-cooperative ue.
Therefore, under the coordinated multi-point transmission, the coordination of the movement of the ue brings various possibilities, and the handover control method will be different from the existing handover control method. Moreover, the cooperative groups are not necessarily completely orthogonal, and a problem of overlapping of partial cooperative group members may occur. How to implement the handover control in this case is also a problem to be solved. In summary, for the above two aspects, currently, there is no solution to the problem of handover control when the ue moves in the coordinated multi-point transmission.
In order to solve the above switching control problem in the multi-point cooperative transmission, no matter whether the movement of the cooperative user terminal causes the change of the cooperative group, as long as the original service node is still in the moved cooperative group, the switching is not initiated to the user terminal; otherwise, if the original service node is no longer in the moved cooperative group, the user terminal needs to be initiated to be switched.
The following describes the handover control method used in the present invention.
As shown in fig. 2, a handover control method includes the following steps:
And 102, making a decision on different cooperation conditions after the user terminal moves from the original service node to the target service node by the cooperation anchor point, and correspondingly executing switching control operation based on the judgment on whether the original service node can continuously provide service for the current user terminal.
Here, based on the determination of whether the original service node can continue to provide the service for the current user terminal, the corresponding execution of the handover control operation is: if the original service node is judged to be capable of continuously providing service for the current user terminal, the cooperative anchor point does not initiate switching to the current user terminal; otherwise, the cooperative anchor point initiates switching to the current user terminal.
The cooperative anchor point is a node for realizing decision judgment and control in a cooperative group of multipoint cooperative transmission. The node is mainly used for judging whether the current user terminal is a cooperative user terminal or a non-cooperative user terminal and which service nodes form a cooperative group serving the cooperative user terminal. The node may be: a master control node of a current cooperation group, a service node of a current user terminal, and the like.
Here, the method further includes a deployment process of the cooperative group, the deployment process of the cooperative group including: a plurality of nodes form a cooperative group, which provides a coordinated multi-point transmission service for a cooperative user terminal and has nodes belonging to a plurality of cooperative groups at the same time. That is, the cooperative groups formed by a plurality of nodes are not completely orthogonal, that is, there is a case where some cooperative group members overlap and the cooperative group members belong to a plurality of cooperative groups at the same time. Here, the cooperative group members constituting the cooperative group include: a serving node for the current user terminal, and a cooperating node other than the serving node.
In step 102, according to different current coordination situations, the coordination anchor point makes a decision for different coordination situations, and accordingly, specific processing procedures for executing the switching control operation are different, including the following four situations.
In the first case, the current ue is a cooperative ue, and the current cooperative situation is: after the cooperative user terminal moves, the original cooperative group still provides the coordinated user terminal with the multipoint cooperative transmission service. And the original service node is an original cooperative group member. Under the coordination condition, the original service node can naturally continue to provide service for the moved coordination user terminal, and then the coordination anchor point judges that the original service node can continue to provide service for the current user terminal, namely the coordination user terminal, and correspondingly executed switching control operations are as follows: no handover is initiated for the user. That is, at this time, it is not necessary to switch the current ue from the original serving node to another node, and the original serving node continues to provide services for the current ue. If the user still initiates the handover, not only the system resources will be wasted, but also the handover delay will be brought.
In a second case, the current ue is a cooperative ue, and the current cooperative situation is: after the cooperative ue moves, due to a change of a channel condition or other factors, for example, a channel condition from an original cooperative group member to a current ue becomes worse, the original cooperative group is already not suitable for providing the coordinated ue with the coordinated ue, and a new cooperative group is required to provide the coordinated ue with the coordinated ue, that is: and providing the coordinated multi-point transmission service for the coordinated user terminal by the updated new coordination group. And the updated new cooperative group still contains the original service node. Under the coordination condition, since the updated new coordination group still includes the original service node, it means that the original service node will continue to provide the coordinated multi-point transmission service for the moved coordinated user terminal, and the coordination anchor point determines that the original service node can continue to provide the service for the current user terminal, that is, the coordinated user terminal, and the correspondingly executed switching control operation is: no handover is initiated for the user. That is, at this time, it is not necessary to switch the current ue from the original serving node to another node, and the original serving node continues to provide services for the current ue. If the user initiates the handover, not only the system resources are wasted, but also the handover delay is brought.
In a third case, the current ue is a cooperative ue, and the current cooperative situation is: when the cooperative ue moves, due to changes in channel conditions or other factors, the original cooperative group is not suitable for providing the cooperative ue with the coordinated multi-point transmission service, and a new cooperative group is needed to provide the cooperative multi-point transmission service for the cooperative ue, that is: and providing the coordinated multi-point transmission service for the coordinated user terminal by the updated new coordination group. And the updated new cooperation group does not contain the original service node. Under the coordination condition, since the updated new coordination group no longer includes the original service node, it means that the original service node cannot continue to provide the coordinated multi-point transmission service for the moved coordinated user terminal, the coordination anchor point determines that the original service node cannot continue to provide the service for the current user terminal, that is, the coordinated user terminal, and the correspondingly executed switching control operation is: a handover is initiated to the user.
In a fourth situation, after moving, the cooperative ue no longer needs to be served cooperatively, and becomes a non-cooperative ue, that is, the current cooperative situation is: after the cooperative user terminal moves, the current user terminal is changed from the cooperative user terminal to the non-cooperative user terminal. And the original service node can provide service for the non-cooperative user terminal. Under the coordination condition, the coordination anchor point judges that the original service node can continuously provide service for the current user terminal, namely the non-coordination user terminal, and correspondingly executed switching control operations are as follows: no handover is initiated for the user. That is, at this time, it is not necessary to switch the current ue from the original serving node to another node, and the original serving node continues to provide services for the current ue.
In summary, with the handover control solution formed in the above step 101 and step 102, after selecting a target service node, determining whether to handover a current user terminal to the selected target service node through handover control, and if it is determined that the original service node can continue to provide service for the current user terminal, not initiating handover to the current user terminal in cooperation with an anchor point; otherwise, the cooperative anchor point initiates switching to the current user terminal, and the user terminal is switched from the original service node to the selected target service node.
The following four embodiments are used to describe the handover control procedure in the coordinated multipoint transmission according to the present invention.
Fig. 3 is a schematic diagram illustrating coverage, service range and ue mobile location of the four embodiments. In fig. 3, base stations 1 to 7 are included, and cells 1 to 7 correspond to cells in which the base stations are located. The base station 1, the base station 2 and the base station 7 form a cooperative group a, and the cooperative group a provides multipoint cooperative transmission for the user terminal in the cross-hatched area. The base station 1, the base station 6 and the base station 7 form a cooperative group b, and the cooperative group b provides multipoint cooperative transmission for the user terminal in a diagonally shaded area. The base station 3, the base station 4 and the base station 7 form a cooperative group c, and the cooperative group c provides multipoint cooperative transmission for the user terminal in a cross-hatched area. The user terminal is located at a position A at the edge of a cell 1 where a base station 1 is located before moving, the base station 1 is an original service node of the user terminal, and a cooperative group a provides multipoint cooperative transmission for the user terminal. In different coordination situations corresponding to the following four embodiments, whether the identity of the ue is a coordination ue or a non-coordination ue is determined by the coordination anchor, and which nodes form a coordination group serving the coordination ue. The serving node of the user terminal may act as a cooperative anchor.
The first embodiment is as follows: as shown in fig. 3, when the ue moves from the current position a to the current position B, the coordination anchor, such as the base station 1, determines the coordination situation after the ue moves, and performs handover control on the ue. The handover control flow of this embodiment includes the following steps:
step 201, the ue sends a measurement report to the original serving node, i.e. the base station 1, and the base station 1 determines, according to the measurement report and RRM information of the ue, that the target serving node, i.e. the base station 7, can provide better service for the ue.
Step 202, the base station 1 determines that the ue is still a cooperative ue when the ue is located at the position B, and continues to provide the coordinated multi-point transmission service for the ue through the cooperative group a.
Step 203, the base station 1 determines that the base station 1 can continue to provide service for the user terminal according to the collaborative information after the user terminal moves, and does not initiate switching control for the user terminal.
Here, in this embodiment, before and after the movement of the cooperative ue, the same cooperative group is used for its coordinated multi-point transmission, and the original serving node is always in the cooperative group, and then the ue is not initiated to perform handover control.
The second embodiment is as follows: as shown in fig. 3, when the ue moves from the current position a to the current position C, the coordination anchor, such as the base station 1, determines the coordination situation after the ue moves, and performs handover control on the ue. The handover control flow of this embodiment includes the following steps:
step 301, the ue sends a measurement report to the original serving node, i.e. the base station 1, and the base station 1 determines, according to the measurement report and RRM information of the ue, that the target serving node, i.e. the base station 6, can provide better service for the ue.
Step 302, the base station 1 determines that the ue is still a cooperative ue when the ue is at the position C, but the original cooperative group a is no longer suitable for providing the coordinated multi-point transmission service for the ue, the cooperative group is updated, and the cooperative group b provides the coordinated multi-point transmission service for the ue.
Step 303, the base station 1 determines that although the cooperative group is changed, the base station 1 is still in the new cooperative group, i.e. the cooperative group b, according to the cooperative information after the user terminal moves, and can continue to provide service for the user terminal without initiating a handover control to the user terminal.
Here, in this embodiment, the collaborative groups before and after the movement of the collaborative ue are changed, but both the collaborative groups before and after the movement include the original service node, and the original service node may continue to serve the moved ue, and then does not initiate handover control on the ue.
The third embodiment is as follows: as shown in fig. 3, when the ue moves from the current position a to the current position D, the coordination anchor, such as the base station 1, determines the coordination situation after the ue moves, and performs handover control on the ue. The handover control flow of this embodiment includes the following steps:
step 401, the ue sends a measurement report to the original serving node, i.e. the base station 1, and the base station 1 determines, according to the measurement report and RRM information of the ue, that the target serving node, i.e. the base station 7, can provide better service for the ue.
Step 402, the base station 1 determines that the ue is still a cooperative ue when the ue is at the position D, but the original cooperative group a is no longer suitable for providing the coordinated multi-point transmission service for the ue, updates the cooperative group, and provides the coordinated multi-point transmission service for the ue through the cooperative group c.
Step 403, the base station 1 determines that the cooperative group changes according to the cooperative information after the user terminal moves, and the base station 1 is not in the new cooperative group, that is, the cooperative group c, obviously, the base station 1 cannot continue to provide service for the user terminal, and needs to initiate a handover control for the user terminal.
Here, in this embodiment, the collaborative group is changed before and after the collaborative user terminal moves, the new collaborative group after the movement no longer includes the original service node, and the original service node cannot continue to serve the user terminal after the movement, and then the handover control is initiated for the user terminal.
The fourth embodiment is: as shown in fig. 3, when the ue moves from the current position a to the position E, the coordination anchor, such as the base station 1, determines the coordination situation after the ue moves, and performs handover control on the ue. The handover control flow of this embodiment includes the following steps:
step 501, the user terminal sends a measurement report to the original serving node, i.e. the base station 1, and the base station 1 determines, according to the measurement report and RRM information of the user terminal, that the target serving node, i.e. the base station 1, can provide better service for the user terminal.
Step 502, the base station 1 determines that when the ue is at the location E, the ue is changed from the cooperative ue to the non-cooperative ue without providing the coordinated multi-point transmission service to the ue.
Step 503, the base station 1 determines that the base station 1 can provide service for the user terminal without initiating handover control for the user terminal according to that the user terminal is no longer a cooperative user terminal after moving but the location E is within the service range of the base station 1.
Here, in this embodiment, after the cooperative user terminal moves, the cooperative user terminal is no longer a cooperative user terminal, but becomes a non-cooperative user terminal, and a single service node provides a service for the user terminal. Although the identity of the user terminal is changed, the original service node can continue to serve the user terminal without initiating switching control to the user terminal due to moving into the service range of the original service node.
As shown in fig. 4, a handover control system includes: a selection realization unit and a control realization unit. The selection realization unit is used for selecting the target service node by the original service node according to the measurement report reported by the current user terminal. And the control realization unit is used for correspondingly executing the switching control operation based on the judgment of whether the original service node can continuously provide the service for the current user terminal.
As shown in fig. 4, in a handover control system, the control implementation unit further includes a decision implementation module, configured to implement decision for different coordination situations after the current user terminal moves from the original service node to the target service node in cooperation with the anchor point. Therefore, the control implementation unit correspondingly executes the switching control operation based on the decision and the judgment on whether the original service node can continuously provide the service for the current user terminal.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A handover control method, comprising: the cooperative anchor point makes a decision on different cooperative conditions of the cooperative user terminal after moving from an original service node to a target service node, and if the original service node is judged to be capable of continuously providing service for the current user terminal, the cooperative anchor point does not initiate switching to the current user terminal; otherwise, the cooperative anchor point initiates switching to the current user terminal.
2. The method of claim 1, wherein before the cooperative anchor point making a decision and control on the cooperative situation after the cooperative ue moves, the method further comprises: and the original service node selects the target service node according to the measurement report reported by the cooperative user terminal.
3. The method of claim 2, wherein the current coordination situation is: after the cooperative user terminal moves, the original cooperative group still provides service for the cooperative user terminal, and the original service node is a member of the original cooperative group; the cooperative anchor point judges that the original service node can continue to provide service for the current cooperative user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
4. The method of claim 2, wherein the current coordination situation is: after the cooperative user terminal moves, a new cooperative group provides service for the cooperative user terminal, and the new cooperative group still comprises the original service node; the cooperative anchor point judges that the original service node can continue to provide service for the current cooperative user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
5. The method of claim 2, wherein the current coordination situation is: after the cooperative user terminal moves, a new cooperative group provides service for the cooperative user terminal, and the new cooperative group does not include the original service node; the cooperative anchor point judges that the original service node can not continuously provide service for the current cooperative user terminal, and correspondingly executed switching control operations are as follows: the handover is performed.
6. The method of claim 2, wherein the current coordination situation is: after the cooperative user terminal moves, the current cooperative user terminal becomes a non-cooperative user terminal, and the original service node can continue to provide service for the non-cooperative user terminal; the cooperative anchor point judges that the original service node can continue to provide service for the current non-cooperative user terminal, and correspondingly executed switching control operations are as follows: no handover is performed.
7. The method according to any one of claims 1 to 6, wherein the cooperative anchor point is a node in a cooperative group that implements decision making and control.
8. The method of claim 7, further comprising the deployment of the collaborative group, the deployment of the collaborative group comprising: at least two nodes form a cooperative group, and provide coordinated multi-point transmission service for cooperative user terminals together, and the nodes belonging to at least one cooperative group exist at the same time.
9. A handover control system, comprising: a selection realization unit and a control realization unit; wherein,
a selection realization unit, which is used for the original service node to select the target service node according to the measurement report reported by the current cooperative user terminal;
the control realization unit is used for not initiating switching to the current user terminal by the cooperative anchor point if the original service node is judged to be capable of continuously providing service for the current user terminal; otherwise, the cooperative anchor point initiates switching to the current user terminal.
10. The system according to claim 9, wherein the control implementation unit further comprises a decision implementation module, configured to implement decision for the cooperative anchor point to decide different cooperative situations after the current cooperative user terminal moves from the original serving node to the target serving node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910076803.4A CN101784091B (en) | 2009-01-21 | 2009-01-21 | Switching control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910076803.4A CN101784091B (en) | 2009-01-21 | 2009-01-21 | Switching control method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101784091A CN101784091A (en) | 2010-07-21 |
| CN101784091B true CN101784091B (en) | 2014-04-09 |
Family
ID=42523850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910076803.4A Expired - Fee Related CN101784091B (en) | 2009-01-21 | 2009-01-21 | Switching control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101784091B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067403B (en) * | 2013-01-10 | 2016-07-06 | 中兴通讯股份有限公司 | A kind of business switch method, system and server |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949919A (en) * | 2005-10-10 | 2007-04-18 | 上海原动力通信科技有限公司 | Method for judging handover in mobile communication system |
| CN101166369A (en) * | 2006-10-18 | 2008-04-23 | 日本电气株式会社 | Handover control system, method for the same, and mobile communication system and radio base station |
-
2009
- 2009-01-21 CN CN200910076803.4A patent/CN101784091B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949919A (en) * | 2005-10-10 | 2007-04-18 | 上海原动力通信科技有限公司 | Method for judging handover in mobile communication system |
| CN101166369A (en) * | 2006-10-18 | 2008-04-23 | 日本电气株式会社 | Handover control system, method for the same, and mobile communication system and radio base station |
Non-Patent Citations (1)
| Title |
|---|
| CMCC.《Application of BBU+RRU based CoMP system to LTE-Advanced》.《3GPP TSG-RAN1 #55，R1-084487，CMCC，Application of BBU+RRU based CoMP system to LTE-Advanced》.2008,第1-3页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101784091A (en) | 2010-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101571729B1 (en) | How to Perform a CoMP Set Unit Handoff | |
| EP3560235B1 (en) | Handover procedures in multi-carrier networks | |
| WO2018028307A1 (en) | Coordinated multi-point-based beam configuration and management method | |
| CN100484294C (en) | Handover method and system in a broadband wireless access communication system | |
| US9137686B2 (en) | Method and arrangement for cell outage compensation in a communication network system | |
| Xu et al. | User relay assisted traffic shifting in LTE-Advanced systems | |
| JP2009530900A (en) | Improved handover for adaptive antennas | |
| CN101583164B (en) | Method for selecting uplink cells in LTE-A | |
| EP3038423B1 (en) | Antenna system and processing method | |
| KR20100113137A (en) | Method for allocating bandwidth from radio frequency spectrum in cellular network including set of cells | |
| EP1962536A1 (en) | System and method for forming cell by using distributed antennas in WiMAX mobile communication system | |
| CN108377573B (en) | Method and apparatus for cluster-based multi-connection wireless communication system | |
| Zhou et al. | Multi-beam transmission and dual-band cooperation for control/data plane decoupled WLANs | |
| CN102695209A (en) | Load balancing method for different coverage scenes and base station | |
| CN101527942B (en) | Method for switching mobile terminal in microwave access global intercommunication system | |
| CN112671500B (en) | Co-channel interference suppression method and corresponding communication terminal | |
| Yaacoub | A practical approach for base station on/off switching in green LTE-A HetNets | |
| CN101784091B (en) | Switching control method and system | |
| ul Islam et al. | Self-optimization of antenna tilt and pilot power for dedicated channels | |
| KR101698898B1 (en) | Hand-over method for mobile-communition service | |
| Xenakis et al. | Advanced mobility management for reduced interference and energy consumption in the two-tier LTE-Advanced network | |
| CN109005566B (en) | An Anchor-Based User-Centric Multi-Connection Mobility Design Method | |
| WO2013004288A1 (en) | Method and apparatuses for configuring a communication channel | |
| WO2013023698A1 (en) | Method for determining the topology of a wireless communication network | |
| CN102480773A (en) | Multicarrier-based communication compensation method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20180121 |