WO2011127766A1

WO2011127766A1 - Method and device for obtaining configuration parameters of antenna ports of a base station

Info

Publication number: WO2011127766A1
Application number: PCT/CN2011/071177
Authority: WO
Inventors: 邓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-13
Filing date: 2011-02-22
Publication date: 2011-10-20
Also published as: CN102223648B; CN102223648A

Abstract

A method for obtaining configuration parameters of antenna ports of a base station is provided by the present invention. When the configuration parameters of antenna ports of the base station require to be changed, the base station sends the changed configuration parameters of antenna ports to a relay node by using a dedicated signaling, so that the relay node can apply the changed configuration parameters of antenna ports of the base station in time, and accomplish data signal transmission with the base station by using the antenna ports, of which the configuration is changed. A device for obtaining configuration parameters of antenna ports of a base station is also provided by the present invention. By the present invention, it is realized that the relay node obtains the change of antenna ports configuration of the base station, so that the relay node can keep the connection with the network side in real time, and the success ratio and efficiency of data signal transmission between the relay node and the base station are improved.

Description

Method and device for obtaining base station antenna port configuration parameters

The present invention relates to antenna port configuration techniques in a long term evolution system, and more particularly to a method and apparatus for obtaining base station antenna port configuration parameters. Background technique

In order to meet the growing demand for large-bandwidth, high-speed mobile access, the 3GPP (Third Generation Partnership Projects) introduces the LTE-Advanced (Long-Term Evolution advanced) standard, LTE-Advanced for the long-term The evolution of the LTE (Long-Term Evolution) system retains the core of LTE. On this basis, a series of technologies are used to expand the frequency domain and the airspace to achieve the purpose of improving spectrum utilization and increasing system capacity.

The wireless relay (Relay) technology is one of the technologies in LTE-Advanced. It aims to extend the coverage of the cell, reduce the dead zone in the communication, balance the load, transfer the traffic in the hotspot area, and save the user equipment (UE, User Equipment). That is, the transmission power of the terminal. As shown in FIG. 1, a relay node (RN, Relay-Node) is added between the original base station (Door-eNB) and the UE, and the newly added RN and the Donor-eNB perform a wireless connection. The radio link between the Donor-eNB and the RN is called a backhaul link, and the radio link between the RN and the UE is called an access link. The downlink data arrives at the Donor-eNB first, and then passes to the RN, which then transmits the signal to the UE, and the uplink data is reversed.

When the access link and the backhaul link share the same frequency band, the RN needs to maintain a connection with the Donor-eNB to complete the uplink data interaction and downlink data interaction in the backhaul link, and on the other hand, needs to maintain a connection with the UE. The uplink data interaction and downlink data interaction in the access link are completed, which will lead to conflict of RN data processing. In order to solve this problem, a backhaul link is introduced. The downlink subframe configuration may be referred to as a Fake MBSFN (Fake Multicast Broadcast Single Frequency Network) sub-frame. In the Fake MBSFN subframe, the RN performs data interaction with the Donor-eNB, but not Signals are sent to UEs in the access link.

In the LTE system, Donor-eNB uses multi-antenna transmission technology, which can have single antenna configuration such as Antenna Port 0, dual antenna configuration such as Antenna Port 0 and Antenna Port 1, and four antennas set to 1" column Antenna Port 0 Antenna Port 1, Antenna Port 2 and Antenna Port 3 or other antenna configurations. 不同 Different antenna configurations, different antenna ports transmit different cell-specific reference signals and different transmission signals. The UE in the connected state needs to measure the cell-specific reference signal and/or report the measurement result, and also needs to receive the signal transmitted by different antennas. In the LTE system, the UE or the RN generally decodes the main information block (MIB, Master) sent by the cell. Information block) Obtain antenna configuration parameters such as the number of antenna ports. The MIB itself does not include antenna configuration parameters, but the MIB needs to be scrambled with the antenna port configuration parameters. In this way, the UE or RN can obtain the antenna port of the access cell from the MIB through blind detection. Configuration parameters.

After the RN accesses the Donor-eNB-managed cell and is in a normal working state, it only receives the signal sent by the Donor-eNB in the downlink subframe of the backhaul link. Since the MIB is only scheduled in a specific subframe of the Donor-eNB, it is very likely The RN cannot receive the MIB sent by the Donor-eNB. For example, as shown in FIG. 2, subframe #3 and subframe #8 are downlink link downlink subframes, and subframe #0 is used for scheduling MIB, and RN can only receive Donor-eNB in subframe #3 and subframe #8. The signal sent, at this time, the RN does not receive the MIB sent by the Donor-eNB, and thus cannot know the antenna port configuration parameters of the Donor-eNB, nor can it know the change of the antenna port configuration of the Donor-eNB, so that it cannot be effectively received. The changed multi-antenna transmission signal. Because the antenna port configuration directly affects the signal transmission mode, the RN does not know the antenna port configuration parameters of the Donor-eNB in time, and cannot maintain the connection with the network side, and thus cannot serve the UE under coverage.

In addition, in the existing protocol, only when switching from the current cell to the target cell, the network side That is, the radio resource control (RRC, Radio Resource Control) signaling that is exchanged between the base station and the UE includes the mobility control information (Mobility Control Info) carrying the configuration parameters of the target cell antenna port. When the handover does not occur, the network side does not Notifying the UE or the RN of the antenna port configuration parameter of the serving cell to which the RN is connected. At this time, the RN cannot acquire the antenna port configuration parameter of the accessed Donor-eNB cell, so that the RN cannot know the changed multi-antenna transmission signal in time. Therefore, the RN cannot maintain the connection with the network side, and thus cannot serve the UE under its coverage. Summary of the invention

In view of the above, the main object of the present invention is to provide a method and a device for acquiring a configuration parameter of a base station antenna port, so as to solve the problem that the RN cannot know the configuration of the antenna port of the base station in time in the prior art, so that the changed multiple antenna cannot be known in time. The problem of transmitting signals.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a method for obtaining a base station antenna port configuration parameter, the method includes: when a base station antenna port configuration parameter is to be changed, the base station sends a dedicated signaling carrying a self antenna port configuration parameter to the relay node, where The relay node obtains the changed base station antenna port configuration parameters from the dedicated signaling.

In the above solution, the dedicated signaling is media access control layer control signaling or radio resource control layer signaling carrying the base station antenna port configuration parameter.

In the above solution, the method further includes: determining, by the base station, whether the relay node can receive a primary information block of the base station itself, and if yes, the base station does not send the dedicated signaling to the relay node, The relay node obtains the changed base station antenna port configuration parameter by parsing the received primary information block; otherwise, when the antenna port configuration parameter of the base station is to be changed, the base station sends the dedicated to the relay node Signaling.

In the above solution, the base station determines whether the relay node can receive the primary information block of the base station, and the base station: the base station checks the subframe by using the downlink scheduling subframe of the relay node and the primary information block, It is determined whether the relay node can receive the master information block of the base station itself. In the above solution, after the relay node obtains the changed base station antenna port configuration parameter, the method further includes: the relay node applying the changed base station antenna port configuration parameter, by changing the configuration The latter antenna port performs data transmission with the base station.

In the above solution, the applying the changed base station antenna port configuration parameter is: according to the explicitly indicated or predefined time information, after the relay node applies the change at a specified time Base station antenna port configuration parameters.

In the above solution, the explicit indication is: the base station carries the time information in the dedicated signaling sent to the relay node.

In the above solution, the time information explicitly indicated is a specified system frame number, or a specified system frame number and a subframe number, or a specified time period.

In the above solution, the predefined time information includes a predefined time period, or a start time of a modification period of the next system information, or a start time of a modification period of the Nth system message, where N is greater than Or an integer equal to 1.

In the above solution, the antenna port configuration parameters of the base station include the changed number of antenna ports, and/or antenna port composition parameters, and/or the number of changed antenna ports, and/or the changed antenna port composition parameters.

The present invention further provides an apparatus for acquiring a configuration parameter of a base station antenna port, the apparatus comprising: a detecting unit and a sending unit, wherein: a detecting unit, configured to: start the sending when detecting that a base station antenna port configuration parameter is to be changed And a sending unit, configured to send, to the relay node, dedicated signaling that carries the changed base station antenna port configuration parameter, so that the relay node obtains the changed base station antenna port configuration parameter.

In the above solution, the device further includes: a verification unit, wherein: the verification unit is configured to determine whether the relay node can receive the main information block of the base station, and when the determination result is no, start the detection unit, Otherwise, the detection unit is not activated.

In the foregoing solution, the device further includes: a receiving unit, configured to receive main information of the base station Blocking, or receiving the dedicated signaling sent by the sending unit.

In the above solution, the apparatus further includes: a parsing unit, configured to parse the main information block of the base station received by the receiving unit, to obtain the changed base station antenna port configuration parameter.

The method and device for acquiring base station antenna port configuration parameters of the present invention, when the antenna port configuration parameter of the base station is to be changed, the base station sends the changed base station antenna port configuration parameter to the relay node by using dedicated signaling, so that the antenna at the base station is When the port configuration changes, the relay node can apply the changed base station antenna port configuration parameters in time, and complete the data signal transmission with the base station by changing the configured antenna port. The invention realizes the knowledge that the relay node changes the configuration of the antenna port of the base station, so that the relay node can maintain the connection with the network side, and improves the success rate and efficiency of data signal transmission between the relay node and the base station. In addition, the present invention has small changes to the existing protocol, simple implementation, and flexible configuration. DRAWINGS

1 is a schematic structural diagram of a network system in an LTE/SAE architecture in the prior art; FIG. 2 is a schematic diagram of downlink subframe scheduling of a relay node;

3 is a schematic structural diagram of an apparatus for acquiring a configuration parameter of a base station antenna port according to the present invention; FIG. 4 is a schematic diagram of a downlink subframe scheduling of a relay node according to Embodiment 1 of the present invention;

5 is a schematic flowchart of obtaining a configuration parameter of a base station antenna port according to Embodiment 1 of the present invention; FIG. 6 is a schematic diagram of a downlink subframe scheduling of a relay node according to Embodiment 2 of the present invention;

FIG. 7 is a schematic flowchart of obtaining configuration parameters of a base station antenna port according to Embodiment 2 of the present invention. detailed description

The basic idea of the present invention is: When the configuration parameter of the antenna port of the RN accessing the Donor-eNB is changed, the RN needs to reacquire the antenna port configuration parameter of the Donor-eNB. In the present invention, the Donor-eNB first determines the RN. Whether it can receive the main sent by the Donor-eNB The information block (MIB, Master Information Block), if yes, the RN can obtain the changed antenna port configuration parameter of the Donor-eNB by parsing the received MIB. Otherwise, the Donor-eNB sends the changed RN to the RN through dedicated signaling. The antenna port configuration parameter, the RN receives the dedicated signaling, and obtains the base station antenna port configuration parameter, so that the RN can apply the changed antenna port parameter of the Donor-eNB, and transmit the data signal to the Donor-eNB through the changed antenna port, And performing measurement of a cell-specific reference signal, and the like.

The method for obtaining the Donor-eNB antenna port configuration parameter is specifically as follows: When the antenna port configuration parameter of the Donor-eNB is to be changed, the Donor-eNB sends a dedicated signaling carrying the changed antenna port configuration parameter to the RN, the RN The dedicated signaling is received to obtain the changed Donor-eNB antenna port configuration parameters.

Here, the antenna port configuration parameters of the Donor-eNB may include the number of antenna ports used by the Donor-eNB after changing the antenna port configuration, and/or the antenna port composition parameters used, and/or changes such as an increase or The number of antenna ports removed, and/or the changed antenna port composition parameters.

Here, the dedicated signaling may be Medium Access Control (MAC) layer control signaling or Radio Resource Control (RRC) layer signaling.

The method further includes: the Donor-eNB determines whether the RN can receive the Donor-eNB's own MIB, and if yes, the Donor-eNB does not send the dedicated signaling to the RN, and the RN parses The received MIB obtains the changed antenna port configuration parameter of the Donor-eNB; otherwise, when the antenna port configuration parameter of the Donor-eNB is to be changed, the Donor-eNB sends the dedicated signaling to the RN.

Here, the Donor-eNB determines whether the RN can receive the Donor-eNB's own MIB by checking the downlink scheduling subframe of the RN and the MIB scheduling subframe. If the downlink scheduling subframe of the RN includes an MIB scheduling subframe, the RN can receive the MIB of the Donor-eNB, Otherwise, the RN does not receive the MIB of the Donor-eNB.

After the RN obtains the changed base station antenna port configuration parameter, the method further includes: the RN applies the obtained base station antenna port configuration parameter, and performs data transmission with the Donor-eNB by changing the configured antenna port. .

Here, the applying the changed base station antenna port configuration parameter may be: according to the explicitly indicated or predefined time information, the RN applies the changed base station antenna port configuration parameter at a specified time. .

Here, the manner of the explicit indication may be: the Donor-eNB carries the time information in the dedicated signaling sent to the relay node, so that the RN applies the changed base station antenna port configuration parameter after the specified time And receiving, by the configured antenna port, the data signal sent by the Donor-eNB, and measuring a cell-specific reference signal.

The time information explicitly indicated is a specified system frame number (SFN, System Frame Number), or a specified SFN and subframe number, or a specified time period.

The time information may also be in a predefined manner, where the predefined time information includes a predefined time period, or a start time of a modification period of the next system information, or an Nth system message. The start time of the modification period, where N is an integer greater than or equal to 1.

In order to implement the above method of the present invention, the present invention further provides a device for obtaining a Donor-eNB antenna port configuration parameter. As shown in FIG. 3, the device mainly includes: a detecting unit 31 and a sending unit 32, where:

The detecting unit 31 is configured to start the sending unit when detecting that the antenna port configuration parameter of the Donor-eNB is to be changed;

The sending unit 32 is configured to send, to the RN, special signaling that carries the changed antenna port configuration parameter, so that the RN can obtain the changed antenna port configuration parameter.

The device further includes: a verification unit 33, configured to determine whether the RN can receive the MIB of the Donor-eNB, and if the result of the determination is negative, start the detection. Unit 31, otherwise, does not activate the detection unit 31.

Specifically, the verification unit 33 determines whether the RN can receive the MIB of the Donor-eNB, and if not, starts the detecting unit 31, when the detecting unit 31 detects that the antenna port configuration parameter of the Donor-eNB is to be changed. The restart sending unit 32 transmits the dedicated signaling carrying the changed antenna port configuration parameter to the RN, otherwise the detecting unit 31 is not activated.

In addition, the device may further include: a receiving unit 34, configured to receive the MIB of the Donor-eNB, or receive the dedicated signaling sent by the sending unit 31.

Specifically, the Donor-eNB's MIB is sent by other parts of the Donor-eNB that have a transmitting function, or may also be sent by the transmitting unit 32.

The apparatus may further include: a parsing unit 35, configured to parse the MIB of the Donor-eNB received by the receiving unit 34, and obtain an antenna port configuration parameter of the changed base station.

In an actual application, the detecting unit 31, the collating unit 33, and the transmitting unit 32 in the foregoing apparatus may be disposed on the Donor-eNB side to complete transmission of the antenna port configuration parameter after the Donor-eNB change, and the receiving unit 34 and the parsing unit 35 It may be set on the RN side to complete the process of the RN acquiring the antenna port configuration parameter of the changed Donor-eNB.

Embodiment 1

After initial power-on, the RN searches for Cell-1 of the Donor-eNB, reads the system message of the cell Cell-1 in the Donor-eNB, and obtains MIB, SIB 1, SIB2, etc. from the system message, and then obtains The MIB performs decoding to obtain an antenna port configuration parameter including the number of the antenna ports of the cell Cell-1, and the RN sends a message to the Donor-eNB according to the obtained antenna port configuration parameter of the cell Cell-1. Initiating an RRC connection, establishing a signaling bearer and a data bearer with the Donor-eNB, and obtaining parameter configurations including an RN downlink subframe configuration parameter, such as a Fake MBSFN subframe configuration parameter, a RN-managed cell parameter, and the like, and then the RN enters a normal working state. In the normal working state, the RN can only receive the downlink signal sent by the Donor-eNB in the Fake MBSFN subframe. In this embodiment, as shown in FIG. 4, the SFN numbers of the cells of the cell Cell-1 and the RN are both the same, and the subframes included in the SFN are aligned, where M is between 0 and 1023, including 0. And any integer of 1023. It is set in the Fake MBSFN subframe configuration parameter, and subframe #03 and subframe #08 are used for downlink scheduling of the Donor-eNB to the RN. According to the existing protocol, the subframe #00 of the cell Cell-1 is used to schedule the MIB.

When the antenna port configuration parameter of the cell Cell-1 is to be changed, the RN needs to acquire the antenna port configuration parameter of the changed cell Cell-1, so as to continue to receive the downlink data signal sent by the Donor-eNB, as shown in FIG. The process is as follows:

Steps 501-502: The Donor-eNB checks whether the RN can receive the Donor-eNB's own MIB by checking the downlink scheduling subframe of the RN and the MIB scheduling subframe. If yes, proceeding to step 502, the RN parses the received MIB, obtaining the antenna port configuration parameter of the changed cell Cell-1 and continuing to steps 505-506, otherwise, proceeding to step 503;

Here, if the downlink scheduling subframe of the RN includes the MIB scheduling subframe, the RN can receive the MIB, otherwise, the RN cannot receive the MIB.

Therefore, in this embodiment, the result of the determination in step 501 is no.

Step 503: The Donor-eNB sends a dedicated signaling carrying the antenna port configuration parameter of the changed cell Cell-1 to the RN;

Here, the dedicated signaling may be MAC layer control signaling or RRC layer signaling;

In an actual application, the dedicated signaling may be RRC Connection Reconfiguration, RRC Connection Reestablishment, or RRC parameter configuration signaling in the RRC layer signaling. Specifically, the cell for carrying the antenna port configuration parameter may be added in the RRC layer signaling as the dedicated signaling, for example, the antenna may be added in the radio resource Config Dedicated information in the RRC connection reconfiguration. The cell of the port configuration parameter.

For example, the Donor-eNB sends RRC connection reconfiguration signaling to the RN, the signaling containing the change The antenna port configuration parameter of the cell Cell-1, wherein the antenna port configuration parameter may include the number of antenna ports of the changed cell Cell-1, and/or the complete antenna port component parameter, and may also include the changed antenna port. The number, and/or the changed antenna port composition parameters.

For example, before the antenna port configuration of the cell Cell-1 changes, the number of antenna ports in the antenna port parameter is 1, that is, the antenna port 0 is used. After the change, the antenna port parameter of the cell Cell-1 is the number of antenna ports is 2, that is, The antenna port 0 and the antenna port 1 are used, and the content of the antenna port configuration parameter sent by the Donor-eNB to the RN may be: The number of antenna ports is 2, and/or the antenna port 0 and the antenna port 1 are used, and may also be: The number of antenna ports is increased by 1, and/or the application antenna port 1 is added.

The dedicated signaling may also be MAC layer control signaling. In practical applications, it can be implemented by extending the MAC layer control signaling. Specifically, a new field for indicating an antenna port configuration parameter may be defined in the MAC layer control signaling, or an antenna port configuration parameter may be defined by an existing idle field, and the antenna port configuration parameter to be sent is written to be defined. In the new field or idle field, it is sent to the RN through MAC layer control signaling.

Step 504: The RN receives the dedicated signaling sent by the Donor-eNB, and obtains the antenna port configuration parameter of the changed cell Cell-1.

Step 505: After obtaining the antenna port configuration parameter of the changed cell Cell-1, the RN returns a response message to the Donor-eNB.

Specifically, the response information returned by the RN to the Donor-eNB may be signaling such as RRC connection reconfiguration completion, or RRC connection reestablishment completion, or RRC parameter configuration completion.

Step 506: The RN applies the changed antenna port configuration parameter of the cell Cell-1, performs data signal transmission with the Donor-eNB through the antenna port 0 and the antenna port 1, and measures a cell-specific reference signal.

Specifically, the RN uses the existing multiple input multiple output (MIMO) technology to apply the antenna port configuration parameter of the changed cell Cell-1, and receives the antenna port configuration parameter. The base station changes the data transmitted by the configured antenna port, and completes the measurement of the cell-specific reference signal.

For example, after the changed number of antenna ports of the cell Cell-1 is 2, the antenna port 0 and the antenna port 1 are used, the RN receives the antenna port 0 and the antenna port 0 after receiving the changed antenna port configuration parameter of the cell Cell-1. The data signal transmitted by antenna port 1 and the measurement of the cell-specific reference signal of antenna port 0 and antenna port 1 are measured. It should be noted that the time-frequency position of the cell-specific reference signal transmitted by different antenna ports is specified by the protocol.

In an actual application, after receiving the changed antenna port configuration parameter of the cell Cell-1 sent by the Donor-eNB, the RN may immediately apply the antenna port configuration parameter, or may return the response message after the RN returns the Donor-eNB. Apply the antenna port configuration parameters. In this embodiment, step 506 can also be performed before step 505. In addition, step 505 is an optional step, and may also be omitted according to actual application requirements.

Embodiment 2

In this embodiment, as shown in FIG. 6, the SFN number of the cell Cell-1 is M, and the SFN number of the cell under the RN is N, and the SFN numbers are different but the subframe boundaries are aligned.

M and N are between 0 and 1023, including any two different integers of 0 and 1023. Subframe #02 and subframe #07 are used for downlink scheduling of the Donor-eNB to the RN.

When the RN accesses the Cell-1 of the cell under the jurisdiction of the Donor-eNB, and is in the normal working state, the cell

The number of antenna ports of Cell-1 is 1 and the antenna port used is antenna port 0. In order to increase the service throughput of the cell Cell-1, the cell Cell-1 needs to increase the number of antenna ports. At this time, the cell

The antenna port configuration of Cell-1 needs to be changed. The number of antenna ports of cell Cell-1 is increased to four, and the applied antenna port is changed to antenna port 0, antenna port 1, antenna port 2, and antenna port 3. The Donor-eNB needs to notify the RN of the changed antenna port configuration parameters of the cell Cell-1, as shown in Figure 7, the specific process is as follows:

Steps 701-702: identical to steps 501-502; Step 703: The Donor-eNB sends, to the RN, dedicated signaling that carries the antenna port configuration parameter of the changed cell Cell-1, and the dedicated signaling further includes time information that the RN applies the antenna port configuration parameter.

The time information included in the dedicated signaling may be absolute time information or relative time information. The absolute time information may be a specified SFN, or a specified SFN and a subframe. For example, the RN may apply to the changed cell 1-1 when the cell SF-1 or the SFN of the cell under the RN is 20 The antenna port configuration parameter may be specified. When the SFN is 30 and the subframe is 05, the RN applies the antenna port configuration parameter of the changed cell Cell-1; the relative time information may be a time period, and the RN receives the dedicated message. After the time period of the command, the antenna port configuration of the changed cell Cell-1 is applied. For example, when the relative time is set to 20 milliseconds, the RN applies the changed after receiving the dedicated signaling for 20 milliseconds. Antenna port configuration parameters of cell Cell-1.

Steps 704-705: identical to steps 504-505;

Step 706: The RN is in the time information, and the changed antenna port configuration parameter of the cell Cell-1 is applied at a time specified by the Donor-eNB.

Specifically, in this embodiment, after applying the changed antenna port configuration parameter of the cell Cell-1 at the time specified by the Donor-eNB, the RN separately receives the data signals sent by the four antenna ports of the Donor-eNB, and measures four antennas. Cell-specific reference signal on the port.

Embodiment 3

In this embodiment, as shown in FIG. 2, the SFN number of the cell Cell-1 is M, and the SFN number of the cell under the RN is N, and the subframes in the SFN are not aligned, where M and N are 0. Between ~1023, including any two different integers of 0 and 1023, subframe #03 and subframe #08 are used for Downer-eNB downlink scheduling of the RN.

When the antenna port configuration of the cell Cell-1 is to be changed, the Donor-eNB needs to notify the RN of the process of changing the antenna port configuration parameters of the cell 1 of the cell, and the specific procedure and the second embodiment The same is true, in this embodiment, the time information of the RN application antenna port configuration parameter is not included in the dedicated signaling of the antenna port configuration parameter sent by the Donor-eNB, but is used in advance. Defined mode settings.

Specifically, the pre-definition of the time information may be completed by negotiation between the RN and the Donor-eNB, or may be sent to the other party after being set in either the RN or the Donor-eNB, or may be specified by a protocol.

The predefined time information may be absolute time information, such as a specified SFN, or may be relative time information, such as a time period after the RN receives the antenna port configuration parameter, or may be a cell Cell-1 or an RN. The start time of the next system information modification period of the jurisdiction or the start time of the modification period of the Nth system message, where N is an integer greater than or equal to 1.

In this embodiment, the RN and the Donor-eNB may notify the other party's own system message by means of dedicated signaling, or may use the background operation and maintenance (0&Μ, Operation & Maintenance) server to learn the other party's system. The modification period of the message, configuration parameters such as SFN.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention. Industrial applicability

After the invention is used, the relay node can accurately know the configuration parameters of the base station antenna port, so that the relay node can maintain the connection with the network side in real time, and improve the success rate and efficiency of data signal transmission between the relay node and the base station. The invention has small changes to the existing protocol, and is simple to implement and flexible in configuration.

Claims

Claim

A method for obtaining a configuration parameter of a base station antenna port, the method comprising:

When the antenna port configuration parameter of the base station is to be changed, the base station transmits dedicated signaling carrying the self antenna port configuration parameter to the relay node, and the relay node obtains the changed base station antenna port configuration parameter from the dedicated signaling.

2. The method for obtaining base station antenna port configuration parameters according to claim 1, wherein:

The dedicated signaling is media access control layer control signaling or radio resource control layer signaling carrying the base station antenna port configuration parameters.

The method for obtaining a base station antenna port configuration parameter according to claim 1 or 2, wherein the method further comprises:

Determining, by the base station, whether the relay node can receive a primary information block of the base station itself, and if yes, the base station does not send the dedicated signaling to the relay node, and the relay node parses the received The master information block obtains the changed base station antenna port configuration parameter; otherwise, when the antenna port configuration parameter of the base station is to be changed, the base station sends the dedicated signaling to the relay node.

The method for obtaining a base station antenna port configuration parameter according to claim 3, wherein the base station determines whether the relay node can receive the master information block of the base station, as follows:

The base station determines whether the relay node can receive the master information block of the base station by checking the downlink scheduling subframe of the relay node and the primary information block scheduling subframe.

The method for obtaining a base station antenna port configuration parameter according to claim 1, wherein after the relay node obtains the changed base station antenna port configuration parameter, the method further includes: The relay node applies the changed base station antenna port configuration parameter, and performs data transmission with the base station by changing the configured antenna port.

The method for acquiring base station antenna port configuration parameters according to claim 5, wherein the applying the changed base station antenna port configuration parameter is: according to an explicitly indicated or predefined time Information, the relay node applies the changed base station antenna port configuration parameter at a specified time.

The method for obtaining a base station antenna port configuration parameter according to claim 6, wherein the explicit indication is specifically: the base station carries the time in the dedicated signaling sent to the relay node information.

The method for acquiring base station antenna port configuration parameters according to claim 7, wherein the explicitly indicated time information is a specified system frame number, or a specified system frame number and a subframe number, or a specified one. period.

The method for obtaining a base station antenna port configuration parameter according to claim 6, wherein the predefined time information comprises a predefined time period, or a start time of a modification period of a next system information, or The start time of the modification period of the Nth system message, where N is an integer greater than or equal to 1.

The method for obtaining base station antenna port configuration parameters according to claim 1, wherein the antenna port configuration parameters of the base station include a changed number of antenna ports, and/or antenna port composition parameters, and/or The number of antenna ports changed, and/or the changed antenna port composition parameters.

A device for obtaining a configuration parameter of a base station antenna port, the device comprising: a detecting unit and a sending unit, wherein:

a detecting unit, configured to start the sending unit when detecting that a base station antenna port configuration parameter is to be changed;

a sending unit, configured to send, to the relay node, a configuration of a base station antenna port carrying the changed base station The number of dedicated signaling causes the relay node to obtain the changed base station antenna port configuration parameters.

The device for acquiring a base station antenna port configuration parameter according to claim 11, wherein the device further comprises: a check unit, wherein:

And a verification unit, configured to determine whether the relay node can receive the primary information block of the base station, and when the determination result is no, start the detection unit, otherwise, the detection unit is not activated.

The device for acquiring the antenna port configuration parameter of the base station according to claim 11 or 12, wherein the device further comprises:

And a receiving unit, configured to receive a primary information block of the base station, or receive the dedicated signaling sent by the sending unit.

The device for acquiring base station antenna port configuration parameters according to claim 13, wherein the device further comprises:

And a parsing unit, configured to parse the main information block of the base station received by the receiving unit, to obtain the changed base station antenna port configuration parameter.