CN101795474B

CN101795474B - Method, device and system for automatically configuring serving cells of relay nodes

Info

Publication number: CN101795474B
Application number: CN 200910077889
Authority: CN
Inventors: 刘宇红; 邓天乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-02-02
Filing date: 2009-02-02
Publication date: 2013-04-17
Anticipated expiration: 2029-02-02
Also published as: CN101795474A; WO2010085918A1

Abstract

The embodiment of the invention relates to a method, a device and a system for automatically configuring serving cells of relay nodes. The method includes the following steps that: a target cell is selected, a reselection message is sent to the current serving cell, a reselection acknowledgment message which is sent after the current serving cell and the target cell carry out reselection coordination according to the reselection message is received, and the reselection acknowledgment message contains a judgement result which is obtained after the target cell judges whether to allow the relay node is reselected to the target cell. The embodiment effectively solves the ICI problem of an LTE-A system with relay nodes.

Description

Method, device and system for automatically configuring serving cell of relay node

Technical Field

The present invention relates to mobile communication technologies, and in particular, to a method, an apparatus, and a system for automatically configuring a serving cell of a relay node.

Background

In a wireless communication system, a base station transmits an electromagnetic wave signal to a mobile terminal in a wireless manner to perform communication. Because the electromagnetic wave signals are affected by factors such as path attenuation, building shielding and environment in the transmission process, the strength of the electromagnetic wave signals in certain areas is weak, and the communication quality of mobile terminals in the areas is reduced. Moreover, as the industry demand for broadband communications and wireless bandwidth grows, higher and higher carrier frequencies are used in new protocols and systems. However, since the attenuation of electromagnetic wave signals during transmission increases with increasing frequency, high carrier frequencies inevitably face the problem of high attenuation, further limiting the coverage area of the base station. In order to solve the coverage problem of the base station, it is generally necessary to enhance the electromagnetic wave signal between the base station and the mobile terminal by using the wireless relay station. The wireless relay station and the base station only transmit electromagnetic waves through a wireless link for communication, and wired transmission is not needed, so the method has the advantages of low network deployment cost and simplicity in deployment.

Existing cellular mobile communication systems, for example: in the third generation mobile communication system, the data rates provided by the third generation mobile communication system are greatly different between the cell center and the cell edge, which not only affects the capacity of the whole system, but also causes great fluctuation of the service quality obtained by the user at different positions. Inter-cell interference (ICI) is an inherent problem in cellular mobile communication systems, and the conventional solution is to use frequency multiplexing, where the multiplexing coefficient is only selected from a few specific options, such as 1, 3, and 7. A reuse factor of 1 indicates that neighboring cells all use the same frequency resources, and interference is severe at the cell edge. Higher multiplexing coefficients, such as: 3 or 7, ICI can be effectively suppressed, but the spectral efficiency will drop to 1/3 or 1/7. In order to improve the spectrum utilization rate of wireless resources, under normal conditions, the frequency reuse factor in the system is 1, so as to ensure that each cell can use all frequency bands to transmit data. In this case, inter-cell interference becomes a major factor affecting the performance of future communication systems, especially for cell-edge users. A stronger ICI may be generated if two neighboring cells use the same spectral resources at their junctions.

ICI mitigation techniques currently under study mainly include interference randomization, interference coordination, interference cancellation, and the like. Interference randomization does not reduce the energy of the interference, but randomizes the interference into "white noise" to mitigate the hazards of ICI, and is therefore also referred to as "interference whitening". The interference coordination comprises 'soft frequency reuse' and 'partial frequency reuse', and the method distinguishes users at the center and the edge of a cell and allocates different frequency resources and power resources. The interference cancellation technique is derived from a multi-user detection technique and can demodulate, decode the signal of the interfering cell and then subtract the ICI replica from that cell. Interference cancellation has no limitation on frequency resources at the cell edge, and can achieve cell edge spectral efficiency of 1 and total spectral efficiency of 1. Other techniques, such as MIMO, smart antennas, partial power control, etc., may also be used for ICI mitigation.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: since a relay node is introduced into a Long Term evolution advanced (Long Term evolution _ advance, hereinafter referred to as LTE _ a) system, the ICI problem becomes more complex, and there are not only interference between relay nodes between cells, interference between a relay node and a User Equipment (UE), interference between UEs served by a relay node, and information interaction between the relay node and other network nodes must be completed through the current serving cell, but also no solution to the ICI problem in the LTE _ a system with a relay node in the prior art.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a system for automatically configuring a serving cell of a relay node, which are used for effectively solving the ICI problem in an LTE _ A system with the relay node.

The embodiment of the invention provides a method for automatically configuring a serving cell of a relay node, which comprises the following steps:

selecting a target cell and sending a reselection message to a current serving cell;

and receiving a reselection confirmation message sent by the current serving cell after the current serving cell performs reselection coordination with the target cell according to the reselection message, wherein the reselection confirmation message comprises a judgment result of the target cell whether to allow the relay node to reselect the target cell.

The embodiment of the invention also provides a method for automatically configuring the serving cell of the relay node, which comprises the following steps:

receiving a reselection message sent by a relay node;

according to the reselection message, if reselection coordination is needed to be carried out with a target cell, a reselection request message is sent to the target cell, wherein the reselection request message comprises reselection coordination parameter information;

and sending a reselection confirmation message to the relay node, wherein the reselection confirmation message comprises a judgment result of whether the target cell allows the relay node to reselect the target cell according to the reselection coordination parameter information.

receiving a reselection request message sent by a current serving cell of a relay node, wherein the reselection request message comprises reselection coordination parameter information;

judging whether the relay node is allowed to reselect a target cell according to the reselection coordination parameter information carried in the reselection request message;

and sending a reselection response message to the current serving cell, wherein the reselection response message comprises a judgment result of whether the relay node is allowed to reselect the target cell.

The embodiment of the invention also provides a device for automatically configuring the serving cell of the relay node, which comprises the following steps:

a selection module for selecting a target cell;

the first sending module is used for sending reselection information to the current service cell after the selection module selects the target cell;

a first receiving module, configured to receive a reselection confirmation message sent by the current serving cell after performing reselection coordination with the target cell according to the reselection message, where the reselection confirmation message includes a determination result of the target cell whether to allow the relay node to reselect the target cell.

the second receiving module is used for receiving the reselection message sent by the relay node;

a second sending module, configured to send, according to the reselection message received by the second receiving module, a reselection request message to a target cell and a reselection confirmation message to the relay node if reselection coordination with the target cell is required; wherein,

the reselection request message comprises reselection coordination parameter information, and the reselection confirmation message comprises a judgment result that the target cell judges whether the relay node is allowed to reselect the target cell according to the reselection coordination parameter information.

a third receiving module, configured to receive a reselection request message sent by a current serving cell of a relay node, where the reselection request message includes reselection coordination parameter information;

a fourth judging module, configured to judge whether to allow the relay node to reselect a target cell according to the reselection coordination parameter information carried in the reselection request message;

a third sending module, configured to send a reselection response message to the current serving cell, where the reselection response message includes a determination result of whether to allow the relay node to reselect the target cell.

The embodiment of the invention also provides a system for automatically configuring the serving cell of the relay node, which comprises the relay node, the current serving cell node and the target cell node;

the relay node is used for selecting the target cell node, sending a reselection message to the current serving cell node, and receiving a reselection confirmation message sent by the current serving cell node after performing reselection coordination with the target cell node according to the reselection message;

the current serving cell node is configured to receive a reselection message sent by the relay node, send, according to the reselection message, a reselection request message to the target cell node if reselection coordination with the target cell node is required, where the reselection request message includes reselection coordination parameter information, and send, to the relay node, the reselection confirmation message, where the reselection confirmation message includes a determination result that the target cell node determines, according to the reselection coordination parameter information, whether the relay node is allowed to reselect to the target cell node;

the target cell node is configured to receive a reselection request message sent by the current serving cell node of the relay node, determine whether to allow the relay node to reselect the target cell node according to the reselection coordination parameter information carried in the reselection request message, and send a reselection response message to the current serving cell node, where the reselection response message includes a determination result of whether to allow the relay node to reselect the target cell node.

According to the method, the device and the system for automatically configuring the serving cell of the relay node, provided by the embodiment of the invention, by reselecting the serving cell of the relay node, the interference between the relay node and the UE and the interference between the UE and the UE can be reduced, so that the ICI problem in an LTE _ A system with the relay node is effectively solved.

Drawings

Fig. 1 is a flowchart of a first embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 2 is a flowchart of a second embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 3 is a flowchart of a third embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 4 is a flowchart of a fourth embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 5 is a flowchart of a fifth embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 6 is a flowchart of a sixth embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 7 is a flowchart of a seventh embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 8 is a flowchart of an eighth embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention;

fig. 9 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a first embodiment of the present invention;

fig. 10 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a second embodiment of the present invention;

fig. 11 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a third embodiment of the present invention;

fig. 12 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a fourth embodiment of the present invention;

fig. 13 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a fifth embodiment of the present invention;

fig. 14 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a sixth embodiment of the present invention;

fig. 15 is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a seventh embodiment of the present invention;

fig. 16 is a schematic structural diagram of an eighth embodiment of an apparatus for automatically configuring a serving cell of a relay node according to the present invention.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

First embodiment of method for automatically configuring serving cell of relay node

Fig. 1 is a flowchart illustrating a first embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention. In this embodiment, the relay node may specifically be an edge relay node located in an edge region of a current serving cell, and a serving cell of the edge relay node is not fixed, and this embodiment may specifically include the following steps:

and 11, the edge relay node selects a target cell and sends a reselection message to the current service cell.

Specifically, the edge relay node may autonomously select the target cell: the reason for triggering can include periodic triggering or timing triggering; in addition, the edge relay node may also select the target cell under the trigger of the current serving cell.

The reselection message may include the edge relay node identifier and a current serving cell identifier, where the edge relay node sends the reselection message to the current serving cell according to the current serving cell identifier, and the current serving cell may know which relay node sent the reselection message according to the edge relay node identifier.

And step 12, the edge relay node receives a reselection confirmation message sent by the current serving cell after performing reselection coordination with the target cell according to the reselection message, wherein the reselection confirmation message comprises a judgment result of the target cell for judging whether the edge relay node is allowed to reselect the target cell.

Specifically, if the determination result is that the edge relay node is allowed to reselect the target cell, the edge relay node selects the target cell as a new serving cell, and if the determination result is that the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the new target cell. In addition, the reselection confirmation message may further include a target cell identifier and an edge relay node identifier, the current serving cell sends the reselection confirmation message to the edge relay node according to the edge relay node identifier, and the edge relay node may know, according to the target cell identifier, which target cell is determined.

In this embodiment, a target cell is selected by an edge relay node, and then a reselection confirmation message sent by a serving cell is received, where the reselection confirmation message includes a determination result of whether the target cell allows the edge relay node to reselect the target cell, and after the serving cell of the edge relay node reselects, interference between the edge relay node and the edge relay node, interference between the edge relay node and UE, and interference between the UE and the UE can all be reduced, so that the ICI problem in the LTE _ a system with a relay node is effectively solved.

Method for automatically configuring serving cell of relay node

As shown in fig. 2, which is a flowchart of a second embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention, based on the technical solution shown in fig. 1, an edge relay node selects a target cell under the trigger of a current serving cell, and before step 11, the following steps may be further included:

step 20, the edge relay node receives a reselection indication message sent by the current serving cell.

The receiving, by the edge relay node, the reselection indication message sent by the current serving cell may specifically include the following two cases:

1) when the current serving cell needs to perform inter-cell interference coordination, the edge relay node needs to reselect a new serving cell, so as to reduce the interference, and then the current serving cell sends a reselection indication message to the edge relay node.

2) When the neighboring cell of the current serving cell is turned on or awakened, because the wireless environment changes, whether the edge relay node is continuously served by the current serving cell needs to be reconciled. Therefore, the current serving cell receives the start indication message sent by the neighboring cell, and then the current serving cell knows that the neighboring cell is already started or awakened according to the start indication message, and then sends a reselection indication message to the edge relay node, where the reselection indication message includes information of starting of the neighboring cell.

In order to select the target cell, based on the technical solution shown in fig. 1, step 11 may specifically include the following steps:

and step 21, the edge relay node judges whether the current service cell is an initial service cell. If the current serving cell is the initial serving cell, go to step 22; if the current serving cell is not the initial serving cell, step 23 is performed.

The initial serving cell is a cell to which the edge relay node belongs when the edge relay node is distributed by an operator.

Step 22, the edge relay node selects a target cell according to the measurement result of the edge relay node and/or the served UE, and executes step 24.

The measurement result of the edge relay node and/or the UE served by the edge relay node may specifically include one or more of the received signal quality of the current serving cell and the neighboring cell of the current serving cell measured by the edge relay node according to the edge relay node and/or the UE served by the edge relay node, interference suffered by a link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and interference suffered by a link from the edge relay node to the UE measured by the UE served by the edge relay node.

If one adjacent cell of the current service cell exists, the edge relay node selects the adjacent cell as a target cell; if there are multiple adjacent cells of the current service cell, the edge relay node takes the multiple adjacent cells as candidate target cells, and selects one cell from the candidate target cells as a target cell according to the measurement result. At this time, on the basis of the technical solution shown in fig. 1, in step 11, the reselection message sent by the edge relay node to the current serving cell may further include a target cell identifier.

Specifically, the edge relay node ranks the adjacent cells according to a cell reselection criterion, and then selects a target cell by combining the measurement result, so that the interference between the selected target cell and the current serving cell is reduced as far as possible under the condition that the selected target cell meets the cell reselection criterion. For example: and sequencing the 3 adjacent cells according to a cell reselection criterion, wherein the adjacent cell 3 is the optimal candidate target cell, the adjacent cell is 1 time, and the adjacent cell 2 is the third. If the interference condition between the adjacent cell 3 and the current service cell is the most serious, the adjacent cell 3 can be selected as a target cell; but if the interference situation of the neighboring cell 1 with the current serving cell is the most severe, the neighboring cell 1 may be selected as the target cell, i.e. a compromise may be made according to the specific interference situation.

And step 23, the edge relay node selects the initial serving cell as the target cell and executes step 25.

And step 25, the edge relay node sends a reselection message to the current serving cell, wherein the reselection message comprises a judgment result of reselection coordination with the target cell.

Step 24, the edge relay node judges whether to need to perform reselection coordination with the target cell according to the measurement result of the edge relay node and/or the UE served by the edge relay node, if so, performs step 26, and if not, performs step 22 and step 27 respectively.

Specifically, for example: if the signal quality measured by the UE in the overlapping area between the current serving cell and the target cell is higher than the signal quality measured by the edge relay node in the overlapping area to the target cell, the UE does not select the edge relay node to provide service, but selects the target cell to directly provide service. On the contrary, if the signal quality measured to the target cell by the UE in the overlapping area of the current serving cell and the target cell is weaker than the signal quality measured to the target cell by the edge relay node in the overlapping area, reselection coordination with the target cell is required. It should be noted that the above determination method is only one embodiment of the present invention, and the present invention is not limited to this determination method.

And step 26, the edge relay node sends a reselection message aiming at the reselection indication message to the current serving cell, wherein the reselection message comprises a judgment result of the reselection coordination with the target cell.

And 27, the edge relay node sends a reselection message aiming at the reselection indication message to the current serving cell, wherein the reselection message comprises a judgment result which does not need to be reselected and coordinated with the target cell.

Specifically, because the communication between the edge relay node and other network nodes must pass through the current serving cell, the edge relay node sends a reselection message to the current serving cell, and then the current serving cell performs processing according to a determination result carried in the reselection message.

After step 26 or step 27 is executed, step 12 is executed again.

In this embodiment, when the determination result indicates that reselection coordination with the target cell is required, the current serving cell sends a reselection request message to the target cell, and the target cell determines whether to allow the edge relay node to reselect the target cell according to the re-determination result, and if the edge relay node is allowed to reselect the target cell, the edge relay node reselects the target cell as the current serving cell; and if the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the target cell. And when the judgment result shows that the reselection coordination with the target cell is not needed, the selected target cell is not suitable, and the edge relay node reselects the target cell.

In this embodiment, after the serving cell of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, and interference between the current serving cell and its neighboring cell can be reduced, so that the ICI problem in the LTE _ a system with the relay node is effectively solved. In addition, the edge relay node judges whether the coordination with the target cell is needed or not, and only reports the judgment result to the current service cell, so that the signaling overhead between the edge relay node and the current service cell is saved. In addition, if the current serving cell of the edge relay node is not the initial serving cell, the initial serving cell is selected as the target cell, and the edge relay node and the UE served by the edge relay node are not required to perform measurement, so that the time required by measurement is saved.

Method for automatically configuring serving cell of relay node

As shown in fig. 3, which is a flowchart of a third embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention, based on the technical solution shown in fig. 1, an edge relay node selects a target cell under the trigger of a current serving cell, and before step 11, the following steps may be further included:

step 30, the edge relay node receives a reselection indication message sent by the current service cell;

specifically, the edge relay node may receive the reselection indication message sent by the current serving cell, which specifically refers to the two cases of the edge relay node receiving the reselection indication message sent by the current serving cell in step 20 in the foregoing embodiment, and details are not described here again.

On the basis of the technical solution shown in fig. 1, in order to select the target cell, step 11 may specifically include the following steps:

and step 31, the edge relay node judges whether the current service cell is the initial service cell. If the current serving cell is the initial serving cell, go to step 32; if the current serving cell is not the initial serving cell, step 33 is performed.

Step 32, the edge relay node selects a target cell according to the measurement result of the edge relay node and/or the served UE, and step 34 is executed.

The measurement result comprises one or more of the received signal quality of the current serving cell and the neighboring cells of the current serving cell measured by the edge relay node and/or the UE served by the edge relay node, the interference suffered by the link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and the interference suffered by the link from the edge relay node to the UE measured by the UE served by the edge relay node.

If one adjacent cell of the current service cell exists, the edge relay node selects the adjacent cell as a target cell; if there are multiple adjacent cells of the current service cell, the edge relay node takes the multiple adjacent cells as candidate target cells, and selects one cell from the candidate target cells as a target cell according to the measurement result. At this time, on the basis of the technical solution shown in fig. 1, in step 11, the reselection message sent by the edge relay node to the current serving cell may further include a target cell identifier of the target cell.

And step 33, the edge relay node selects the initial serving cell as the target cell and executes step 35.

And step 35, the edge relay node sends a reselection message to the current serving cell, wherein the reselection message includes a judgment result that reselection coordination needs to be performed with the target cell.

The reselection message may further include the edge relay node identifier and a current serving cell identifier, where the edge relay node sends the reselection message to the current serving cell according to the current serving cell identifier, and the current serving cell may know which relay node sent the reselection message according to the edge relay node identifier.

Step 34, the edge relay node processes the measurement result of the UE and/or the UE served by the edge relay node to obtain a processed measurement result, and step 36 is executed.

In particular, since there are usually a plurality of UEs served by the edge relay node, there are also a plurality of measurement results of the UEs. Because the edge relay node can obtain the same conclusion according to the measurement results of some UEs, a plurality of processed measurement results can be obtained according to the measurement results of all or part of the UEs, the edge relay node only needs to report the processed measurement results to the current serving cell, and does not need to report all the measurement results, thereby saving the signaling overhead between the edge relay node and the current serving cell. For example: according to the measurement result of the first part of UE, obtaining that the interference condition between the adjacent cell 3 and the current service cell is the most serious, wherein the interference level reaches 5 levels; obtaining the interference condition of the adjacent cell 1 and the current service cell, wherein the interference level reaches 4 levels; and obtaining the interference condition between the adjacent cell 2 and the current service cell according to the measurement result of the third part of UE, wherein the interference level reaches level 2. Then, the edge relay node only needs to report to the current serving cell that the interference level between the neighboring cell 3 and the current serving cell is level 5, the interference level between the neighboring cell 1 and the current serving cell is level 4, and the interference level between the neighboring cell 2 and the current serving cell is level 2.

And step 36, the edge relay node sends a reselection message for the reselection indication message to the current serving cell, where the reselection message includes the processed measurement result.

After step 36, the process continues to step 12.

In this embodiment, after the serving cell of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, and interference between the current serving cell and its neighboring cell can be reduced, so that the ICI problem in the LTE _ a system with the edge relay node is effectively solved. In addition, the edge relay node only reports the processed measurement result to the current serving cell, and the serving cell judges whether reselection coordination with the target cell is needed or not, so that signaling overhead between the edge relay node and the current serving cell is saved. In addition, if the current serving cell of the edge relay node is not the initial serving cell, the initial serving cell is selected as the target cell, and the edge relay node and/or the UE served by the edge relay node are not required to perform measurement, so that the time required by measurement is saved.

Method for automatically configuring serving cell of relay node

As shown in fig. 4, a flowchart of a fourth embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention is shown, in this embodiment, a relay node is specifically an edge relay node located in an edge area of a current serving cell, and a serving cell of the edge relay node is not fixed, and this embodiment may specifically include the following steps:

and step 41, the current service cell receives a reselection message sent by the edge relay node.

The reselection message may include an edge relay node identifier and a current serving cell identifier, where the edge relay node sends the reselection message to the current serving cell according to the current serving cell identifier, and the current serving cell knows which relay node sent the message according to the edge relay node identifier.

And step 42, according to the reselection message, if the reselection coordination is required to be performed with the target cell, the current serving cell sends a reselection request message to the target cell, wherein the reselection request message includes reselection coordination parameter information.

The reselection request message may further include a target cell identifier, a current serving cell identifier, and an edge relay node identifier. The current serving cell sends a reselection request message to the target cell according to the target cell identifier, the target cell knows which cell sends the reselection request message according to the current serving cell identifier, and the target cell can know which relay node requests reselection coordination according to the edge relay node identifier; then, the current serving cell receives a reselection response message sent by the target cell, wherein the reselection response message includes a judgment result of the target cell for judging whether to allow the edge relay node to reselect the target cell.

And step 43, the current serving cell sends a reselection confirmation message to the edge relay node, where the reselection confirmation message includes a judgment result of the target cell judging whether to allow the edge relay node to reselect the target cell according to the reselection coordination parameter information.

If the judgment result is that the edge relay node is allowed to reselect the target cell, the edge relay node selects the target cell as a service cell; if the judgment result is that the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the target cell; in addition, after the edge relay node reselects a new serving cell, the current serving cell may enter a sleep state.

The reselection confirmation message may further include an edge relay node identifier, a target cell identifier, and a current serving cell identifier. The current service cell sends a reselection confirmation message to the edge relay node according to the edge relay node identifier, the edge relay node learns the reselection confirmation message sent by which cell according to the current service cell identifier, and the edge relay node learns a judgment result made by which cell according to the target cell identifier.

In this embodiment, the current serving cell receives a reselection message returned by the edge relay node, and if reselection coordination with the target cell is required, the current serving cell sends a reselection request message to the target cell and receives a reselection response message for the reselection request message returned by the target cell, where the reselection response message includes a determination result of whether to allow the edge relay node to reselect to the target cell, and then sends a reselection confirmation message to the edge relay node, where the reselection confirmation message includes a determination result of whether to allow the edge relay node to reselect to the target cell, and thus the serving cell completes reselection coordination with the target cell.

After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE and the interference between the UE and the UE can be reduced; and after the edge of the relay node reselects other cells, the current serving cell can enter a sleep state, so that the interference between the current serving cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node is effectively solved.

Fifth embodiment of method for automatically configuring serving cell of relay node

As shown in fig. 5, a flowchart of a fifth embodiment of the method for automatically configuring a serving cell of a relay node according to the present invention is different from the flowchart of the previous embodiment in that a reselection message may include a determination result of determining whether reselection coordination with a target cell is required by an edge relay node. On the basis of the technical solution shown in fig. 4, step 42 may further include the following steps:

and step 51, the current serving cell acquires a judgment result that whether reselection coordination with the target cell is needed or not is judged by the edge relay node carried in the reselection message.

If the determination result is that reselection coordination with the target cell is required, execute step 42; and if the judgment result is that the reselection coordination with the target cell is not needed, ending the process.

Specifically, if the target cell selected by the edge relay node is the initial serving cell, the reselection message includes a determination result that the edge relay node determines that reselection coordination with the target cell is required. And the current serving cell sends a reselection request message to the target cell according to the judgment result, if the target cell selected by the edge relay node is not the initial serving cell, the reselection request message comprises a judgment result of judging whether reselection coordination with the target cell is needed or not by the edge relay node, and the current serving cell acquires the judgment result.

In this embodiment, the reselection coordination parameter information may include one or more of relay capability, performance parameter, location information, interference information, and load information of the edge relay node.

On the basis of the technical solution shown in fig. 4, the current serving cell may trigger the edge relay node to reselect the serving cell, and step 41 may further include the following steps before:

and step 50, the current service cell sends a reselection indication message to the edge relay node.

Step 41 may specifically be as follows:

and step 52, the current serving cell receives a reselection message sent by the edge relay node for the reselection indication message.

Specifically, two cases may be included in the reselection indication message sent by the current serving cell in step 50, which are shown in fig. 2, where the edge relay node receives the reselection indication message sent by the current serving cell in step 20 of the technical solution, and are not described herein again.

In this embodiment, the current serving cell determines whether reselection coordination with the target cell is required according to a determination result that whether reselection coordination with the target cell is required is determined by the edge relay node in the reselection message. If reselection coordination with the target cell is needed, sending a reselection request message to the target cell, receiving a reselection response message returned by the target cell aiming at the reselection request message, wherein the reselection response message comprises a judgment result of whether the edge relay node is allowed to reselect the target cell, and then sending a reselection confirmation message to the edge relay node, wherein the reselection confirmation message comprises a judgment result of whether the target cell judges whether the edge relay node is allowed to reselect the target cell, so that the current serving cell completes reselection coordination with the target cell.

After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE and the interference between the UE and the UE can be reduced; and after the edge relay node reselects other cells, the current service cell can enter a sleep state, so that the interference between the current service cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node can be effectively solved. In addition, the edge relay node judges whether a reselection request message needs to be sent to the target cell, and the current serving cell only needs to perform corresponding processing according to the judgment result of the edge relay node, so that the signaling overhead between the edge relay node and the current serving cell is saved.

Sixth embodiment of method for automatically configuring serving cell of relay node

As shown in fig. 6, a flowchart of a sixth embodiment of the method for automatically configuring a serving cell of a relay node according to the present invention is different from the technical solution shown in fig. 4 in that a reselection message may include a measurement result obtained by processing a measurement result of a UE served by the edge relay node and/or the measurement result of the UE. The measurement result comprises one or more of the received signal quality of the current serving cell and the neighboring cells of the current serving cell measured by the edge relay node for the edge relay node and/or the UE served by the edge relay node, the interference suffered by the link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and the interference suffered by the link from the edge relay node to the UE measured by the UE served by the edge relay node. On the basis of the technical solution shown in fig. 4, step 42 may further include the following steps:

step 61, the current serving cell judges whether reselection coordination with the target cell is needed or not according to the processed measurement result carried in the reselection message; if reselection coordination with the target cell is needed, go to step 42; otherwise, step 62 is performed.

And step 62, the current serving cell returns a judgment result that the reselection coordination with the target cell is not needed to the edge relay node.

Then, the edge relay node learns that the selected target cell is not appropriate according to the judgment result, and reselects the target cell.

and step 60, the current service cell sends a reselection indication message to the edge relay node.

Step 41 may specifically be as follows:

and 63, the current serving cell receives a reselection message sent by the edge relay node aiming at the reselection indication message.

Specifically, the step 60 of sending the reselection indication message by the current serving cell may include two cases, specifically refer to two cases where the edge relay node receives the reselection indication message sent by the current serving cell in the step 20 in the technical solution shown in fig. 2, and details are not described here again.

In this embodiment, the current serving cell determines whether reselection coordination with the target cell is required according to a processed measurement result carried in the reselection message, and if reselection coordination with the target cell is required, sends a reselection request message to the target cell, and receives a reselection response message for the reselection request message returned by the target cell, where the reselection response message includes a determination result of whether to allow the edge relay node to reselect the target cell, and then sends a reselection confirmation message to the edge relay node, and the reselection response message includes a determination result of whether to allow the edge relay node to reselect the target cell by the target cell, so that the current serving cell completes reselection coordination with the target cell.

After the serving cell is reselected, the interference between the edge relay nodes and the UE and the interference between the UE and the UE can be reduced; and after the edge relay node reselects other cells, the current service cell can enter a sleep state, so that the interference between the current service cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node can be effectively solved. In addition, the current serving cell judges whether a reselection request message needs to be sent to the target cell, and the edge relay node only needs to send the processed measurement result to the current serving cell, so that the signaling overhead between the edge relay node and the current serving cell is saved.

Seventh embodiment of method for automatically configuring serving cell of relay node

As shown in fig. 7, a flowchart of a seventh embodiment of a method for automatically configuring a serving cell of a relay node according to the present invention is shown, in this embodiment, a relay node is specifically an edge relay node located in an edge area of a current serving cell, and a serving cell of the edge relay node is not fixed, and this embodiment may specifically include the following steps:

step 71, the target cell receives a reselection request message sent by the current serving cell of the edge relay node, where the reselection request message includes reselection coordination parameter information.

And step 72, the target cell judges whether the edge relay node is allowed to reselect the target cell according to the reselection coordination parameter information carried in the reselection request message.

And 73, the target cell sends a reselection response message to the current serving cell, wherein the reselection response message includes a judgment result of whether the edge relay node is allowed to reselect the target cell.

Then, the current serving cell sends a reselection confirmation message to the edge relay node, where the reselection confirmation message includes a determination result of whether the edge relay node is allowed to reselect to the target cell. The edge relay node processes according to the judgment result, if the judgment result is that the edge relay node is allowed to reselect the target cell, the edge relay node selects the target cell as the serving cell; and if the judgment result is that the edge relay node is not allowed to reselect, the edge relay node reselects the target cell.

In addition, the reselection request message may further include a target cell identifier, a current serving cell identifier, and an edge relay node identifier, where the current serving cell sends the reselection request message to the target cell according to the target cell identifier, the target cell knows which cell sent the reselection request message according to the current serving cell identifier, and the target cell can know which relay node requests reselection according to the edge relay node identifier.

In this embodiment, the target cell determines whether the edge relay node is allowed to be reselected to the target cell according to the parameter information of the edge relay node carried in the reselection request message, and feeds back the determination result to the current serving cell, thereby completing reselection coordination between the target cell and the current serving cell, and after the serving cell of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, thereby effectively solving the ICI problem in the LTE _ a system with the relay node.

Eighth embodiment of method for automatically configuring serving cell of relay node

As shown in fig. 8, a flowchart of an eighth embodiment of the method for automatically configuring a serving cell of a relay node according to the present invention is different from the previous embodiment in that the reselection coordination parameter information in step 71 specifically may include one or more of relay capability, performance parameter, location information, interference information, and load information of an edge relay node, and on the basis of the previous embodiment, step 72 specifically may be:

step 81, the target cell determines whether to allow the edge relay node to reselect to the target cell according to one or more of the relay capability, the performance parameter, the location information, the interference information, and the load information of the edge relay node.

In this embodiment, the target cell determines whether to allow the edge relay node to reselect the target cell according to one or more of the relay capability, the performance parameter, the location information, the interference information, and the load information of the edge relay node carried in the reselection request message, and feeds back a determination result to the current serving cell, thereby completing reselection coordination between the target cell and the current serving cell. After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE, and the interference between the UE and the UE can be reduced, so that the ICI problem in the LTE _ A system with the relay node is effectively solved.

First embodiment of apparatus for automatically configuring serving cell of relay node

In this embodiment, the relay node is specifically an edge relay node located in an edge region of the current serving cell, and the serving cell of the edge relay node is not fixed.

As shown in fig. 9, a schematic structural diagram of a first embodiment of the apparatus for automatically configuring a serving cell of a relay node according to the present invention may specifically include a first receiving module 91, a selecting module 92, and a first sending module 93.

Wherein, the selecting module 92 is configured to select a target cell; specifically, the selection module 92 may autonomously select the target cell, wherein the reason for the trigger may include a periodic trigger or a timing trigger; in addition, the selection module 92 may also select the target cell under the trigger of the current serving cell. The first sending module 93 is configured to send a reselection message to the current serving cell after the selecting module 92 selects the target cell. The reselection message may include the edge relay node identifier and a current serving cell identifier, the first sending module 93 sends the reselection message to the current serving cell according to the current serving cell identifier, and the current serving cell may know which relay node sends the reselection message according to the edge relay node identifier.

The first receiving module 91 is configured to receive a reselection confirmation message sent by the current serving cell after performing reselection coordination with the target cell according to the reselection message, where the reselection confirmation message includes a determination result that the target cell determines whether to allow the edge relay node to reselect to the target cell. If the determination result is that the edge relay node is allowed to reselect the target cell, the selection module 92 selects the target cell as a new serving cell; if the determination result is that the edge relay node is not allowed to reselect the target cell, the selection module 92 reselects a new target cell.

In addition, the reselection confirmation message may further include a target cell identifier and an edge relay node identifier, the current serving cell sends the reselection confirmation message to the edge relay node according to the edge relay node identifier, and the edge relay node may know, according to the target cell identifier, which target cell is determined.

In this embodiment, the selection module 92 selects a target cell, the first sending module 93 sends a reselection message to the current serving cell, and the first receiving module 91 receives a reselection confirmation message sent by the current serving cell, where the reselection confirmation message includes a determination result of whether the target cell allows the edge relay node to reselect to the target cell. After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE, and the interference between the UE and the UE can be reduced, so that the ICI problem in the LTE _ A system with the relay node is effectively solved.

Second embodiment of apparatus for automatically configuring serving cell of relay node

As shown in fig. 10, which is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a second embodiment of the present invention, on the basis of the schematic structural diagram shown in fig. 9, a selecting module 92 selects a target cell under the trigger of a current serving cell, and a first receiving module 91 is further configured to receive a reselection indication message sent by the current serving cell; the selecting module 92 is further configured to select the target cell after the first receiving module 91 receives the reselection indication message.

The receiving, by the first receiving module 91, the reselection indication message sent by the current serving cell may include the following two cases:

1) when the current serving cell needs to perform inter-cell interference coordination, the selection module 92 needs to reselect a new serving cell to reduce the interference, so that the current serving cell sends a reselection indication message to the edge relay node.

2) The first receiving module 91 may further receive a reselection indication message sent by the current serving cell according to the start indication message after the current serving cell receives the start indication message sent by a neighboring cell of the current serving cell. Specifically, when the neighboring cell of the current serving cell is turned on or awakened, because the wireless environment changes, and whether the edge relay node is continuously served by the current serving cell needs to be reconciled, the current serving cell first receives an on indication message sent by the neighboring cell, and then the current serving cell knows that the neighboring cell is turned on or awakened according to the on indication message, and then sends a reselection indication message to the edge relay node.

In order to select the target cell, the selection module 92 may specifically include a first determining subunit 101 and a first selecting subunit 102.

The first determining subunit 101 is configured to determine whether a current serving cell is an initial serving cell; the initial serving cell is a cell to which the edge relay node belongs when the edge relay node is distributed by an operator. The first selecting subunit 102 is configured to, according to the determination result of the first determining subunit 101, select a target cell according to a measurement result of the edge relay node and/or the UE served by the edge relay node if the current serving cell is the initial serving cell; and if the current serving cell is not the initial serving cell, selecting the initial serving cell as a target cell. The measurement result of the edge relay node and/or the UE served by the edge relay node may specifically include one or more of the received signal quality of the current serving cell and the neighboring cell of the current serving cell measured by the edge relay node and/or the UE served by the edge relay node, the interference suffered by the link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and the interference suffered by the link from the edge relay node to the UE measured by the UE served by the edge relay node.

If there is one neighboring cell of the current serving cell, the first selecting subunit 102 selects the neighboring cell as a target cell; if there are multiple neighboring cells of the current serving cell, the first selecting subunit 102 uses these multiple neighboring cells as candidate target cells, and selects one cell from the candidate target cells as a target cell according to the measurement result. At this time, on the basis of the technical solution shown in fig. 9, the reselection message sent by the first sending module 93 to the current serving cell may further include a target cell identifier of the target cell.

After the first selecting subunit 102 selects the initial serving cell as the target cell, the reselection request message sent by the first sending module 93 to the current serving cell may further include a determination result that needs to perform reselection coordination with the target cell.

When the target cell selected by the first selecting subunit 102 is not the initial serving cell, in order to determine whether reselection coordination with the target cell is required, the embodiment may further include a second determining module 104, configured to determine whether reselection coordination with the target cell is required according to a measurement result of the edge relay node and/or a UE served by the edge relay node.

The reselection message sent by the first sending module 93 to the current serving cell includes a determination result that the second determining module 104 determines whether reselection coordination with the target cell is required. Specifically, because the communication between the edge relay node and other network nodes must pass through the current serving cell, the edge relay node sends a reselection message to the current serving cell, and then the current serving cell performs processing according to a determination result carried in the reselection message.

When the judgment result shows that reselection coordination is needed to be carried out with the target cell, the current serving cell sends a reselection request message to the target cell, the target cell judges whether the edge relay node is allowed to reselect the target cell according to the judgment result, and if the edge relay node is allowed to reselect the target cell, the edge relay node reselects the target cell as the current serving cell; and if the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the target cell. When the determination result indicates that the reselection coordination with the target cell is not required, the first selection subunit 102 reselects the target cell, which indicates that the selected target cell is not suitable.

In this embodiment, after the serving cell of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, and interference between the current serving cell and its neighboring cell can be reduced, so that the ICI problem in the LTE _ a system with the relay node is effectively solved. In addition, the first determining subunit 101 determines whether coordination with the target cell is needed, and the first sending module 93 only reports the determination result to the current serving cell, thereby saving signaling overhead between the edge relay node and the current serving cell. In addition, if the current serving cell of the edge relay node is not the initial serving cell, the first selecting subunit 102 selects the initial serving cell as the target cell, and the edge relay node and the UE served by the edge relay node are not required to perform measurement, which saves the time required for measurement.

Apparatus for automatically configuring serving cell of relay node

As shown in fig. 11, which is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a third embodiment of the present invention, on the basis of the schematic structural diagram shown in fig. 9, a selecting module 92 selects a target cell under the trigger of a current serving cell. The first receiving module 91 is further configured to receive a reselection indication message sent by the current serving cell; the selecting module 92 is further configured to select the target cell after the first receiving module 91 receives the reselection indication message.

Specifically, two situations may be included in the first receiving module 91 receiving the reselection indication message sent by the current serving cell, which refer to the two situations in the foregoing embodiment where the first receiving module 91 receives the reselection indication message sent by the current serving cell, and are not described herein again.

On the basis of the schematic structural diagram shown in fig. 9, in order to select the target cell, the selecting module 92 may specifically include a first determining subunit 101 and a first selecting subunit 102.

The first determining subunit 101 is configured to determine whether a current serving cell is an initial serving cell; the initial serving cell is a cell to which the edge relay node belongs when the edge relay node is distributed by an operator. The first selecting subunit 102 is configured to, according to the determination result of the first determining subunit 101, select a target cell according to a measurement result of the edge relay node and/or the UE served by the edge relay node if the current serving cell is the initial serving cell; and if the current serving cell is not the initial serving cell, selecting the initial serving cell as a target cell.

The measurement result of the edge relay node and/or the UE served by the edge relay node may specifically include one or more of the received signal quality of the current serving cell and the neighboring cell of the current serving cell measured by the edge relay node and/or the UE served by the edge relay node, the interference suffered by the link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and the interference suffered by the link from the edge relay node to the UE measured by the UE served by the edge relay node.

The target cell selected by the first selecting subunit 102 is not the initial serving cell, and in order to determine whether reselection coordination with the target cell is required by the current serving cell, this embodiment may further include a processing module 111, configured to process a measurement result of the edge relay node and/or the UE served by the edge relay node, so as to obtain a processed measurement result. In this embodiment, the reselection message sent by the first sending module 93 to the current serving cell includes the processed measurement result.

Then, after receiving the reselection message, the current serving cell determines whether reselection coordination with the target cell is required according to the processed measurement result carried in the reselection message. When the judgment result is that reselection coordination is needed to be carried out with the target cell, the current serving cell sends a reselection request message to the target cell, the target cell judges whether the edge relay node is allowed to reselect the target cell according to the judgment result, and if the edge relay node is allowed to reselect the target cell, the edge relay node reselects the target cell as the current serving cell; and if the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the target cell. When the determination result indicates that the reselection coordination with the target cell is not required, the first selection subunit 102 reselects the target cell, which indicates that the selected target cell is not suitable.

In this embodiment, after the serving cell of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, so that the ICI problem in the LTE _ a system with the relay node is effectively solved. In addition, the first sending module 93 only reports the processed measurement result to the current serving cell, and the serving cell determines whether reselection coordination with the target cell is needed, so that signaling overhead between the edge relay node and the serving cell is saved. In addition, if the current serving cell of the edge relay node is not the initial serving cell, the first selecting subunit 102 selects the initial serving cell as the target cell, and the edge relay node and/or the UE served by the edge relay node are not required to perform measurement, which saves the time required for measurement.

Fourth embodiment of apparatus for automatically configuring serving cell of relay node

As shown in fig. 12, a schematic structural diagram of a fourth embodiment of an apparatus for automatically configuring a serving cell of a relay node according to the present invention is shown, in this embodiment, a relay node is specifically an edge relay node located in an edge area of a current serving cell, and a serving cell of the edge relay node is not fixed, and this embodiment may specifically include: a second receiving module 121 and a second transmitting module 122.

The second receiving module 121 is configured to receive a reselection message sent by the edge relay node. The reselection message may include an edge relay node identifier and a current serving cell identifier, where the edge relay node sends the reselection message to the current serving cell according to the current serving cell identifier, and the current serving cell knows which relay node sent the message according to the edge relay node identifier.

The second sending module 122 is configured to send a reselection request message to the target cell according to the reselection message received by the second receiving module 121, if reselection coordination needs to be performed with the target cell. Wherein, the reselection request message includes reselection coordination parameter information. In addition, the reselection request message may further include a target cell identifier, a current serving cell identifier, and an edge relay node identifier. The second sending module 122 sends a reselection request message to the target cell according to the target cell identifier, the target cell knows which cell sent the reselection request message according to the current serving cell identifier, and the target cell can know which relay node requests reselection coordination according to the edge relay node identifier.

The second sending module 122 is further configured to send a reselection confirmation message to the edge relay node, where the reselection confirmation message includes a determination result that the target cell determines whether to allow the edge relay node to reselect to the target cell according to the reselection coordination parameter information.

If the judgment result is that the edge relay node is allowed to reselect, the edge relay node selects the target cell as the current service cell of the edge relay node, and if the judgment result is that the edge relay node is not allowed to reselect, the edge relay node reselects the target cell. After the edge relay node reselects a new serving cell, the current serving cell can enter a sleep state.

In addition, the reselection confirmation message may further include an edge relay node identifier, a target cell identifier, and a current serving cell identifier. The current service cell sends a reselection confirmation message to the edge relay node according to the edge relay node identifier, the edge relay node learns the reselection confirmation message sent by which cell according to the current service cell identifier, and the edge relay node learns a judgment result made by which cell according to the target cell identifier.

In this embodiment, the second receiving module 121 receives a reselection message returned by the edge relay node, and if reselection coordination needs to be performed with the target cell, the second sending module 122 sends a reselection request message to the target cell; the second receiving module 121 receives a reselection response message for the reselection request message returned by the target cell, where the reselection response message includes a determination result of whether to allow the edge relay node to reselect the target cell, so that the edge relay node completes reselection coordination with the target cell.

After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE and the interference between the UE and the UE can be reduced; and after the edge relay node reselects other cells, the current service cell can enter a sleep state, so that the interference between the current service cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node can be effectively solved.

Fifth embodiment of apparatus for automatically configuring serving cell of relay node

As shown in fig. 13, a schematic structural diagram of a fifth embodiment of an apparatus for automatically configuring a serving cell of a relay node according to the present invention is different from the previous embodiment in that a reselection message may include a determination result of determining whether reselection coordination with a target cell is required by an edge relay node. On the basis of the schematic structural diagram shown in fig. 12, this embodiment may further include an obtaining module 131, configured to obtain a determination result that the edge relay node carried in the reselection message determines whether reselection coordination with the target cell is needed, and if the determination result is that reselection coordination with the target cell is needed, trigger the second sending module 122 to send the reselection request message to the target cell.

Specifically, if the target cell selected by the edge relay node is the initial serving cell, the reselection message includes a determination result that the edge relay node determines that reselection coordination with the target cell is required, the second sending module 122 sends the reselection request message to the target cell according to the determination result, if the target cell selected by the edge relay node is not the initial serving cell, the reselection message includes a determination result that the edge relay node determines whether reselection coordination with the target cell is required, and the obtaining module 131 obtains the determination result.

On the basis of the technical solution shown in fig. 12, the second sending module 122 is further configured to send a reselection indication message to the edge relay node. The second receiving module 121 is further configured to receive a reselection message returned by the edge relay node for the reselection indication message. Specifically, the reselection indication message may trigger the edge relay node to reselect the serving cell, and after the edge relay node selects a target cell as a new serving cell, the edge relay node returns a reselection message to the current serving cell according to the reselection indication message.

The sending, by the second sending module 122, the reselection indication message to the edge relay node may specifically include the following two cases:

1) when the current serving cell needs to perform inter-cell interference coordination, the edge relay node needs to reselect a new serving cell to reduce the interference, and then the second sending module 122 sends a reselection indication message to the edge relay node.

2) When the neighboring cell of the current serving cell is turned on or awakened, because the wireless environment changes and whether the edge relay node is continuously served by the current serving cell needs to be reconciled, the second receiving module 121 receives an on indication message sent by the neighboring cell of the current serving cell, and then the second sending module 122 learns that the neighboring cell is turned on or awakened according to the on indication message, so as to send a reselection indication message to the edge relay node, where the reselection indication message includes information that the neighboring cell is turned on.

In this embodiment, the obtaining module 131 obtains a determination result of whether the edge relay node in the reselection message needs to perform reselection coordination with the target cell, and if the determination result is that the edge relay node needs to perform reselection coordination with the target cell, the second sending module 122 is triggered to send a reselection request message to the target cell, and the second receiving module 121 receives a reselection response message, which is returned by the target cell and is directed to the reselection request message, where the reselection response message includes a determination result of whether the edge relay node is allowed to reselect to the target cell, so that the edge relay node completes reselection coordination with the target cell.

After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE and the interference between the UE and the UE can be reduced; and after the edge relay node reselects other cells, the current service cell can enter a sleep state, so that the interference between the current service cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node can be effectively solved. In addition, the edge relay node judges whether a reselection request message needs to be sent to the target cell, and the current service node only needs to perform corresponding processing according to the judgment result of the edge relay node, so that the signaling overhead between the edge relay node and the current service cell is saved.

Sixth embodiment of apparatus for automatically configuring serving cell of relay node

As shown in fig. 14, which is a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a sixth embodiment of the present invention, on the basis of the schematic structural diagram shown in fig. 12, a reselection message may include a measurement result obtained by processing a measurement result of a UE served by the edge relay node and/or an edge relay node; the measurement result comprises one or more of the received signal quality of the current serving cell and the adjacent cells of the current serving cell measured by the edge relay node for the edge relay node and/or the UE served by the edge relay node, the interference suffered by the link from the UE served by the edge relay node to the edge relay node measured by the edge relay node, and the interference suffered by the link from the edge relay node to the UE measured by the UE served by the edge relay node.

On the basis of the schematic structural diagram shown in fig. 12, a third determining module 141 may further be included, configured to determine whether reselection coordination with the target cell is needed according to a processed measurement result carried in the reselection message, and if reselection coordination with the target cell is needed, trigger the second sending module 122 to send a reselection request message to the target cell.

In this embodiment, the second sending module 122 is further configured to return a determination result that reselection coordination with the target cell is not needed to the edge relay node. Then, the edge relay node may learn that the selected target cell is not suitable according to the determination result, and reselect the target cell.

Based on the schematic structural diagram shown in fig. 12, the second sending module 122 is further configured to send a reselection indication message to the edge relay node. The second receiving module 121 is further configured to receive a reselection message returned by the edge relay node for the reselection indication message. Specifically, the reselection indication message may trigger the edge relay node to reselect the serving cell, and after the edge relay node selects a target cell as a new serving cell, the edge relay node returns a reselection message to the current serving cell according to the reselection indication message. Specifically, two situations may be included in the sending of the reselection indication message to the edge relay node by the second sending module 122, which refer to the two situations in the foregoing embodiment where the second sending module 122 sends the reselection indication message to the edge relay node, and are not described herein again.

In this embodiment, if the target cell selected by the edge relay node is not the initial serving cell, the third determining module 141 determines whether reselection coordination with the target cell is required according to the processed measurement result carried in the reselection message. If the determination result is that reselection coordination with the target cell is needed, the second sending module 122 sends a reselection request message to the target cell, the second receiving module 121 receives a reselection response message, which is returned by the target cell and is directed to the reselection request message, where the reselection response message includes a determination result of whether to allow the edge relay node to reselect the target cell, so that the edge relay node completes reselection coordination with the target cell.

After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE and the interference between the UE and the UE can be reduced; and after the edge of the relay node reselects other cells, the current serving cell can enter a sleep state, so that the interference between the current serving cell and the adjacent cell can be further reduced, and the ICI problem in the LTE _ A system with the relay node can be effectively inhibited. In addition, the third determining module 141 determines whether a reselection request message needs to be sent to the target cell, and the edge relay node only needs to send the processed measurement result to the current serving cell, so that signaling overhead between the edge relay node and the current serving cell is saved.

Seventh embodiment of apparatus for automatically configuring serving cell of relay node

As shown in fig. 15, a schematic structural diagram of an apparatus for automatically configuring a serving cell of a relay node according to a seventh embodiment of the present invention is shown, in this embodiment, a relay node is specifically an edge relay node located in an edge area of a current serving cell, and a serving cell of the edge relay node is not fixed, and this embodiment may specifically include a third receiving module 151, a fourth determining module 152, and a third sending module 153.

The third receiving module 151 is configured to receive a reselection request message sent by a current serving cell of an edge relay node, where the reselection request message includes reselection coordination parameter information; the fourth judging module 152 is configured to judge whether to allow the edge relay node to reselect the target cell according to reselection coordination parameter information carried in the reselection request message; the third sending module 153 is configured to send a reselection response message to the current serving cell, where the reselection response message includes a determination result of whether to allow the edge relay node to reselect the target cell. And then, the current service cell sends a reselection confirmation message to the edge relay node, wherein the reselection confirmation message comprises a judgment result of whether the edge relay node is allowed to reselect the target cell, and the edge relay node processes according to the judgment result. If the judgment result is that the edge relay node is allowed to reselect the target cell, the edge relay node selects the target cell as a service cell; and if the judgment result is that the edge relay node is not allowed to reselect the target cell, the edge relay node reselects the target cell.

In addition, the reselection request message may further include a target cell identifier, a current serving cell identifier, and an edge relay node identifier, where the current serving cell sends the reselection request message to the target cell according to the target cell identifier, the target cell learns, according to the current serving cell identifier, which cell sent the reselection request message, and the target cell can learn, according to the edge relay node identifier, which relay node requests reselection coordination.

In this embodiment, the fourth determining module 152 determines whether to allow the edge relay node to reselect the target cell according to reselection coordination parameter information carried in the reselection request message, and then the third sending module 153 feeds back the determination result to the current serving cell, so as to complete reselection coordination between the target cell and the current serving cell, after the serving cell is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, thereby effectively solving the ICI problem in the LTE _ a system with a relay node.

Eighth embodiment of an apparatus for automatically configuring serving cell of relay node

As shown in fig. 16, a schematic structural diagram of an eighth embodiment of the apparatus for automatically configuring a serving cell of a relay node according to the present invention is different from the previous embodiment in that parameter information carried in a reselection request message received by the third receiving module 151 may specifically include one or more of a relay capability, a performance parameter, location information, interference information, and load information of an edge relay node, and on the basis of the previous embodiment, the fourth determining module 152 may specifically include a fifth determining subunit 161, configured to determine whether to allow the edge relay node to reselect to a target cell according to one or more of the relay capability, the performance parameter, the location information, the interference information, and the load information of the edge relay node.

In this embodiment, the fifth determining subunit 161 determines whether to allow the edge relay node to reselect the target cell according to one or more of the relay capability, the performance parameter, the location information, the interference information, and the load information of the edge relay node, which are carried in the reselection request message, and feeds back the determination result to the current serving cell, thereby completing reselection coordination between the target cell and the current serving cell. After the serving cell of the edge relay node is reselected, the interference between the edge relay node and the edge relay node, the interference between the edge relay node and the UE, and the interference between the UE and the UE can be reduced, so that the ICI problem in the LTE _ A system with the relay node is effectively solved.

System embodiment for automatically configuring serving cell of relay node

In this embodiment, the relay node is specifically an edge relay node located in an edge region of the current serving cell, and the serving cell node of the edge relay node is not fixed. The embodiment may specifically include an edge relay node, a current serving cell node, and a target cell node.

After the edge relay node selects the target cell node, the edge relay node sends reselection information to the current service cell node. The current serving cell node receives the reselection message, if the current serving cell node needs to perform reselection coordination with the target cell node according to the reselection message, the current serving cell node sends a reselection request message to the target cell node, the reselection request message includes reselection coordination parameter information, the target cell node receives the reselection request message sent by the current serving cell node, whether the edge relay node is allowed to be reselected to the target cell node is judged according to the reselection coordination parameter information carried in the reselection request message, and a reselection response message is sent to the current serving cell node, the reselection response message includes a judgment result of whether the edge relay node is allowed to be reselected to the target cell node, the current serving cell node sends a reselection confirmation message to the edge relay node after receiving the reselection response message, the reselection confirmation message includes a judgment result of whether the edge relay node is allowed to be reselected to the target cell node according to the reselection coordination parameter information, the edge relay node receives the reselection confirmation message. If the judgment result is that the edge relay node is allowed to reselect, the edge relay node reselects the serving cell of the edge relay node to the target cell node, and if the judgment result is that the edge relay node is not allowed to reselect, the edge relay node reselects a new target cell.

It will be understood by those skilled in the art that the current serving cell node may be a base station of a serving cell; the target cell node may be a base station of the target cell.

In this embodiment, through reselection coordination between the edge relay node and the target cell node, after the serving cell node of the edge relay node is reselected, interference between the edge relay node and the edge relay node, interference between the edge relay node and the UE, and interference between the UE and the UE can all be reduced, thereby effectively solving the ICI problem in the LTE _ a system with a relay node.

Finally, it should be noted that: although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A method for automatically configuring a serving cell of a relay node, comprising:

receiving a reselection indication message sent by a current serving cell;

selecting a target cell, and sending a reselection message aiming at the reselection indication message to the current serving cell;

receiving a reselection confirmation message sent by the current serving cell after the current serving cell performs reselection coordination with the target cell according to the reselection message, wherein the reselection confirmation message comprises a judgment result of whether the target cell judges whether to allow the relay node to reselect the target cell;

wherein the receiving the reselection indication message sent by the current serving cell includes:

and after the current serving cell receives the opening indication message sent by the adjacent cell of the current serving cell, receiving a reselection indication message sent by the current serving cell according to the opening indication message.

2. The method of claim 1, wherein selecting the target cell comprises:

judging whether the current serving cell is an initial serving cell;

if the current serving cell is an initial serving cell, selecting a target cell according to the measurement result of the relay node and/or the user equipment served by the relay node;

if the current serving cell is not the initial serving cell, selecting the initial serving cell as a target cell; wherein,

the initial serving cell is a cell to which the relay node belongs during initial setting.

3. The method according to claim 1, wherein the reselection message comprises a measurement result obtained by processing the measurement result of the relay node and/or a user equipment served by the relay node.

4. The method according to claim 1, wherein the reselection message includes a determination result for determining whether reselection coordination with the target cell is required;

after selecting the target cell and before sending the reselection message to the current serving cell, the method further includes:

and judging whether reselection coordination with the target cell is needed or not according to the measurement result of the relay node and/or the user equipment served by the relay node.

5. The method according to claim 2, 3 or 4, wherein the measurement result of the relay node and/or the user equipment served by the relay node comprises one or more of the received signal quality of the current serving cell and the neighboring cell of the current serving cell measured by the relay node and/or the user equipment served by the relay node, the interference suffered by the link from the user equipment served by the relay node to the relay node measured by the relay node, and the interference suffered by the link from the relay node to the user equipment measured by the user equipment served by the relay node.

6. A method for automatically configuring a serving cell of a relay node, comprising:

sending a reselection indication message to the relay node;

receiving a reselection message sent by the relay node for the reselection indication message;

sending a reselection confirmation message to the relay node, wherein the reselection confirmation message comprises a judgment result of whether the target cell allows the relay node to reselect the target cell according to the reselection coordination parameter information;

wherein the sending the reselection indication message to the relay node comprises: and sending a reselection indication message to the relay node according to the received opening indication message sent by the adjacent cell of the current service cell, wherein the reselection indication message comprises the information of opening the adjacent cell.

7. The method according to claim 6, wherein the reselection message includes a determination result of the relay node determining whether reselection coordination with the target cell is required;

before the sending the reselection request message to the target cell, the method further includes:

and acquiring a judgment result of judging whether the relay node needs to perform reselection coordination with the target cell or not, wherein the judgment result is carried in the reselection message.

8. The method according to claim 6, wherein the reselection message includes a measurement result obtained by processing, by the relay node, the measurement result of the relay node and/or a user equipment served by the relay node;

and judging whether reselection coordination with the target cell is needed or not according to the processed measurement result carried in the reselection message.

9. The method of claim 6, 7 or 8, wherein the reselection coordination parameter information comprises one or more of relay capabilities, performance parameters, location information, interference information and load information of the relay node.

10. The method according to claim 8, wherein the measurement results of the relay node and/or the user equipment served by the relay node comprise one or more of the received signal quality of the current serving cell and the neighboring cells of the current serving cell measured by the relay node and/or the user equipment served by the relay node, the interference suffered by the link of the user equipment served by the relay node to the relay node measured by the relay node, and the interference suffered by the link of the relay node to the user equipment measured by the user equipment served by the relay node.

11. An apparatus for automatically configuring a serving cell of a relay node, comprising:

a first receiving module, configured to receive a reselection indication message sent by a current serving cell;

a selection module for selecting a target cell;

a first sending module, configured to send a reselection message for the reselection indication message to the current serving cell after the selection module selects a target cell;

the first receiving module is further configured to receive a reselection confirmation message sent by the current serving cell after performing reselection coordination with the target cell according to the reselection message, where the reselection confirmation message includes a determination result of the target cell whether to allow the relay node to reselect the target cell;

the first receiving module is specifically configured to receive, after the current serving cell receives an on indication message sent by a neighboring cell of the current serving cell, a reselection indication message sent by the current serving cell according to the on indication message.

12. The apparatus of claim 11, wherein the selection module comprises:

a first judging subunit, configured to judge whether the current serving cell is an initial serving cell;

a first selecting subunit, configured to select, according to a determination result of the first determining subunit, a target cell according to a cell reselection criterion and according to a measurement result of the relay node and/or a user equipment served by the relay node, if the current serving cell is an initial serving cell; if the serving cell is not an initial serving cell, selecting the initial serving cell as a target cell; the initial serving cell is a cell to which the relay node belongs during initial setting.

13. The apparatus of claim 11, further comprising:

the processing module is used for processing the measurement result of the relay node and/or the user equipment served by the relay node to obtain a processed measurement result; wherein,

the reselection message sent by the first sending module includes the processed measurement result.

14. The apparatus of claim 11, further comprising:

a second judging module, configured to judge whether reselection coordination with the target cell is needed according to a measurement result of the relay node and/or a user equipment served by the relay node; wherein,

the reselection message sent by the first sending module includes a judgment result that the second judging module judges whether reselection coordination with the target cell is needed.

15. The apparatus according to claim 12, 13 or 14, wherein the measurement result of the relay node and/or the user equipment served by the relay node comprises one or more of the received signal quality of the current serving cell and the neighboring cells of the current serving cell measured by the relay node and/or the user equipment served by the relay node, the interference suffered by the link from the user equipment served by the relay node to the relay node measured by the relay node, and the interference suffered by the link from the relay node to the user equipment measured by the user equipment served by the relay node.

16. An apparatus for automatically configuring a serving cell of a relay node, comprising:

a second sending module, configured to send a reselection indication message to the relay node;

a second receiving module, configured to receive a reselection message sent by the relay node for the reselection indication message;

the second sending module is further configured to send a reselection request message to the target cell and a reselection confirmation message to the relay node according to the reselection message received by the second receiving module if reselection coordination with the target cell is required; wherein,

the reselection request message comprises reselection coordination parameter information, and the reselection confirmation message comprises a judgment result of whether the target cell allows the relay node to reselect the target cell according to the reselection coordination parameter information;

the second receiving module is specifically configured to send a reselection indication message to the relay node after receiving an open indication message sent by a neighboring cell of the current serving cell, where the reselection indication message includes information that the neighboring cell is open.

17. The apparatus according to claim 16, wherein the reselection message includes a determination result of the relay node determining whether reselection coordination with the target cell is required;

the device further comprises:

and the obtaining module is configured to obtain a determination result that the relay node carried in the reselection message determines whether reselection coordination with the target cell is needed, and if the determination result indicates that reselection coordination with the target cell is needed, trigger the second sending module to send a reselection request message to the target cell.

18. The apparatus according to claim 16, wherein the reselection message includes a measurement result obtained by processing, by the relay node, a measurement result of the relay node and/or a measurement result of a user equipment served by the relay node;

the device further comprises:

and a third determining module, configured to determine whether reselection coordination with the target cell is needed according to the processed measurement result carried in the reselection message, and if reselection coordination with the target cell is needed, trigger the second sending module to send a reselection request message to the target cell.

19. The apparatus of claim 16, 17 or 18, wherein the reselection coordination parameter information comprises one or more of relay capabilities, performance parameters, location information, interference information and load information of the relay node.

20. The apparatus of claim 18, wherein the measurement results of the relay node and/or the ue served by the relay node comprise one or more of received signal quality of the current serving cell and neighboring cells of the current serving cell measured by the relay node and/or the ue served by the relay node, interference suffered by the link from the ue served by the relay node to the relay node measured by the relay node, and interference suffered by the link from the relay node to the ue measured by the ue served by the relay node.

21. A system for automatically configuring a serving cell of a relay node is characterized by comprising the relay node, a current serving cell node and a target cell node;

the relay node is used for receiving a reselection indication message sent by a current serving cell, selecting the target cell node, sending a reselection message aiming at the reselection indication message to the current serving cell node, and receiving a reselection confirmation message sent by the current serving cell node after reselection coordination is carried out on the current serving cell node and the target cell node according to the reselection message;

the current serving cell node is configured to send the reselection indication message to the relay node, receive a reselection message sent by the relay node, send, according to the reselection message, a reselection request message to the target cell node if reselection coordination with the target cell node is required, where the reselection request message includes reselection coordination parameter information, and send, to the relay node, the reselection confirmation message, where the reselection confirmation message includes a determination result that the target cell node determines, according to the reselection coordination parameter information, whether to allow the relay node to reselect to the target cell node; wherein the sending the reselection indication message to the relay node comprises: sending a reselection indication message to the relay node according to the received opening indication message sent by the adjacent cell of the current service cell, wherein the reselection indication message comprises the information of opening the adjacent cell;