CN104811228A - Cooperation set constructing method, wireless node and service base station - Google Patents

Abstract

The embodiment of the present invention discloses a method for constructing a cooperative set, a wireless node and a serving base station. The method of the present invention includes: the wireless node monitors the pilot frequency sent by the neighbor base station for measurement, and determines the RSRP value of the reference signal received power of each neighbor base station ; According to the RSRP value of each neighboring base station, the wireless node selects M base stations with the highest RSRP value among the neighboring base stations whose RSRP value exceeds the predetermined power threshold to join the cooperative set; the wireless node notifies the target base station of the information of the cooperative set to determine the wireless node A collection of cooperative base stations. The method of the present invention can adapt to constructing a cooperative set in the on/off scenario of a small base station, and has high flexibility and large performance gain.

Description

A method for constructing a cooperative set, a wireless node and a serving base station

technical field

The invention relates to the field of communication technology, in particular to a method for constructing a cooperative set, a wireless node and a serving base station.

Background technique

In the current wireless communication system, in order to further increase the capacity of the network, the miniaturization of the base station and the densification of the network nodes have become an inevitable choice. In the future, there will even be Ultra Density Network (UDN) deployments, such as deploying hundreds of small base stations within the coverage of a macro station. In a UDN network, due to the large number of small base stations, for a small base station, interference There are many sources, and the cooperation of multiple base stations can effectively reduce the interference level in the network and increase the user data rate. The establishment of the cooperation set is the first step for the cooperation of multiple base stations.

Currently, there are two main ways to establish collaboration collections:

One is fixed cooperative set division, that is, some base stations are divided into a fixed cooperative set by the network side in advance. Although the implementation of this fixed cooperative set division method is relatively simple, it has low flexibility, limited performance gain, and cannot adapt to Random changes in the deployment of small base stations in the future;

The other is divided by the user equipment (User Equipment, UE) exclusive cooperation set, that is, the UE measures the reference signal received power (Reference Signal Received Power) of the serving cell and the adjacent cell according to the common reference signal (Cell-specific Reference signal, CRS). , RSRP) value, determine the UE-specific cooperation set, and report it to the serving base station.

This kind of UE-specific cooperative set division method has good flexibility and high performance gain, but it does not take into account the small base station on/off scenario that may exist in the future high-density network. The small base station on/off scenario means that the small base station adopts on/off Strategy to reduce network interference and reduce network energy consumption. Specifically, when there are no users in the cell or the traffic volume is small, the small base station is temporarily shut down and is in the off state; when there are many users accessing or the traffic volume is large, the small base station The base station is turned on and transitions from the off state to the on state. In the on/off scenario, nodes may be switched on and off quickly, and the duration of the switch state ranges from a few milliseconds to thousands of milliseconds. Unlike the small base station that sends CRS every subframe in the on state, the small base station will send a discovery signal (Discovery Reference Signal, DRS) at a relatively large periodic interval (for example, 20ms) when it is in the off state, and the DRS may be a master synchronization Signal (Primary Synchronization Signal, PSS), secondary synchronization signal (Secondary Synchronization Signal, SSS), CRS or channel state reference signal (Channel-State Information Reference signal, CSI-RS, etc.), if the adjacent base station is in the off state , the UE may not be able to receive the CRS of the neighboring base station within the specified measurement time, resulting in the inability to obtain the RSRP of the neighboring base station, thus affecting the establishment of the cooperative set.

The above two ways of establishing the cooperative set have their application limitations, and they cannot meet the establishment of the cooperative set in the case of random changes in the deployment of the small base station in the future, and the establishment of the cooperative set in the on/off scenario of the small base station.

Contents of the invention

Embodiments of the present invention provide a method for constructing a cooperative set, a wireless node and a serving base station, which can adapt to constructing a cooperative set in an on/off scenario of a small base station, and have high flexibility and large performance gain.

The first aspect of the embodiment of the present invention provides a method for constructing a collaboration set, including:

The wireless node monitors the pilot signal sent by the neighbor base station for measurement, and determines the reference signal received power RSRP value of each neighbor base station;

According to the RSRP values of the neighbor base stations, the wireless node selects M base stations with the highest RSRP values from the neighbor base stations whose RSRP values exceed a predetermined power threshold to join the cooperation set;

The wireless node notifies the target base station of the information of the coordinated set, so as to determine the coordinated base station set of the wireless node.

The second aspect of the embodiment of the present invention provides a method for building a collaboration set, including:

The serving base station receives the information of the cooperation set sent by the user equipment UE, where the information of the cooperation set includes the base station identification information of each coordinated base station;

The serving base station sends signaling requesting to join the cooperative set to each coordinated base station according to the base station identification information of each coordinated base station, so that each coordinated base station sends a feedback confirmation message to the serving base station when confirming to join the coordinated set ;

The serving base station receives the feedback acknowledgment message from the coordinated base station, and adds the base station that has fed back the acknowledgment message to the coordinated base station list of the UE to establish a coordinated base station set.

The third aspect of the embodiment of the present invention provides a wireless node, including:

The first determination unit is configured to monitor the pilot signal sent by the neighbor base station for measurement, and determine the reference signal received power RSRP value of each neighbor base station;

The selection unit is configured to select M base stations with the highest RSRP values among the neighboring base stations whose RSRP values exceed a predetermined power threshold according to the RSRP values of the neighboring base stations to join the cooperative set;

The second determining unit is configured to notify the target base station of the information of the cooperative set, so as to determine the coordinated base station set of the wireless node.

The fourth aspect of the embodiment of the present invention provides a serving base station, including:

a receiving unit, configured to receive the information of the cooperation set sent by the user equipment UE, where the information of the cooperation set includes the base station identification information of each coordinated base station;

A sending unit, configured to send a signaling to each coordinated base station to request to join a cooperative set according to the base station identification information of each coordinated base station, so that each coordinated base station sends a feedback confirmation message to the service when confirming to join the coordinated set base station;

The receiving unit is further configured to receive a feedback acknowledgment message from the coordinated base station, and add the base station that has fed back the acknowledgment message to the coordinated base station list of the UE to establish a coordinated base station set.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, the wireless node listens to the pilot signal sent by the neighbor base station for measurement, determines the reference signal received power RSRP value of each neighbor base station, and according to the RSRP value of each neighbor base station, when the RSRP value exceeds the predetermined power threshold Among the neighboring base stations, select M base stations with the highest RSRP values to join the cooperating set; notify the target base station of the information of the cooperating set, so as to determine the cooperating base station set of the wireless node. The embodiment of the present invention can adapt to constructing a cooperative set in the on/off scenario of a small base station, and has high flexibility and large performance gain.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of a method for constructing a collaborative set in an embodiment of the present invention;

Fig. 2 is a schematic diagram of another embodiment of the method for constructing a cooperative set in the embodiment of the present invention;

Fig. 3 is a schematic diagram of another embodiment of the method for constructing a cooperative set in the embodiment of the present invention;

Fig. 4 is a schematic diagram of another embodiment of the method for constructing a cooperative set in the embodiment of the present invention;

Fig. 5 is a schematic diagram of another embodiment of the method for constructing a cooperative set in the embodiment of the present invention;

Fig. 6 is a schematic diagram of another embodiment of the method for constructing a cooperative set in the embodiment of the present invention;

FIG. 7 is a schematic diagram of an embodiment of a wireless node in an embodiment of the present invention;

Fig. 8 is a schematic diagram of an embodiment of a serving base station in an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a method for constructing a cooperative set, a wireless node and a serving base station, which can adapt to constructing a cooperative set in an on/off scenario of a small base station, and have high flexibility and large performance gain.

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and the like (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Referring to Figure 1, an embodiment of the method for constructing a collaboration set in the embodiment of the present invention includes:

101. The wireless node monitors the pilot signal sent by the neighbor base station for measurement, and determines the reference signal received power RSRP value of each neighbor base station;

In this embodiment, the pilot signal used for measurement may include a discovery signal DRS, and the wireless node monitors the DRS sent by the neighbor base station, and may monitor based on pre-acquired DRS configuration information, and the DRS configuration information includes the type of DRS signal, The transmission period of the DRS signal, the offset information of the DRS signal; the DRS may be a primary synchronization signal PSS, a secondary synchronization signal SSS, a CRS, or a channel state reference signal CSI-RS, etc., which are not limited here.

The pilot signal used for measurement may also include CRS and DRS, that is, the wireless node monitors the DRS sent by the neighbor base station in the off state, and monitors the CRS sent by the neighbor base station in the on state.

In this embodiment, the wireless node may be various wireless devices such as a base station or a user equipment, which is not limited here.

When the wireless node is a base station, the wireless node acquiring the DRS configuration information of a node supporting on/off operation in the network may include:

The base station directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or through a backhaul link (backhaul link, refers to the The connection between the station (cellsite) and the switching center) obtains the DRS configuration information of the node supporting the on/off operation in the network from the central control node, or obtains the information interface of the base station supporting the on/off operation in the network through the information interface with the adjacent base station supporting the on/off operation The DRS configuration information of the node operated by /off. For example, if several combinations of DRS signal types/sending periods and offsets are specified in the standard protocol, the base station may acquire the above DRS configuration information in a blind detection manner.

When the wireless node is a user equipment UE, the wireless node obtaining the DRS configuration information of a node supporting on/off operation in the network may include:

The UE directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off support information in the network through the notification information of the serving base station corresponding to the UE. The DRS configuration information of the node operated by /off. For example, the UE acquires the DRS configuration information of the nodes supporting the on/off operation in the network through the RRC signaling sent by the serving base station.

102. According to the RSRP values of the neighbor base stations, the wireless node selects M base stations with the highest RSRP values from the neighbor base stations whose RSRP values exceed a predetermined power threshold to join the cooperation set;

103. The wireless node notifies the target base station of the information of the coordination set, so as to determine the coordination set of base stations of the wireless node.

In this embodiment, the information of the cooperative set may include the base station identification information of each coordinated base station and the load information of each coordinated base station, which is not limited here; the wireless node notifies the target base station of the information of the coordinated set, and communicates with the target base station interaction to determine the cooperating set of wireless nodes.

In the embodiment of the present invention, the wireless node listens to the pilot signal sent by the neighbor base station for measurement, determines the reference signal received power RSRP value of each neighbor base station, and according to the RSRP value of each neighbor base station, when the RSRP value exceeds the predetermined power threshold Among the neighboring base stations, select M base stations with the highest RSRP values to join the cooperating set; notify the target base station of the information of the cooperating set, so as to determine the cooperating base station set of the wireless node. The embodiment of the present invention can adapt to constructing a cooperative set in the on/off scenario of a small base station, and has high flexibility and large performance gain.

In the embodiment shown in FIG. 1, before the wireless node listens to the pilot signal sent by the neighbor base station for measurement, the wireless node may first obtain the DRS configuration information of the node supporting the on/off operation in the network, please Referring to Figure 2, an embodiment of the method for constructing a collaborative collection in the embodiment of the present invention includes:

201. The wireless node acquires DRS configuration information of nodes supporting on/off operations in the network;

In this embodiment, the DRS configuration information includes the type of the DRS signal, the transmission period of the DRS signal, and the offset information of the DRS signal.

In this embodiment, the wireless node may be various wireless devices such as a base station or a user equipment, which is not limited here.

When the wireless node is a base station, the wireless node acquiring the DRS configuration information of a node supporting on/off operation in the network may include:

The base station directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off operation support information in the network from the central control node through the backhaul link. The DRS configuration information of the node, or obtain the DRS configuration information of the node supporting the on/off operation in the network through the information interface (which can be a wired interface or a wireless interface) with the adjacent base station supporting the on/off operation. For example, if several combinations of DRS signal types/sending periods and offsets are specified in the standard protocol, the base station may acquire the above DRS configuration information in a blind detection manner.

When the wireless node is a user equipment UE, the wireless node obtaining the DRS configuration information of a node supporting on/off operation in the network may include:

The UE directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off support information in the network through the notification information of the serving base station corresponding to the UE. The DRS configuration information of the node operated by /off. For example, the UE acquires the DRS configuration information of the nodes supporting the on/off operation in the network through the RRC signaling sent by the serving base station.

202. The wireless node monitors the pilot signal sent by the neighbor base station for measurement, and determines the reference signal received power RSRP value of each neighbor base station;

In this embodiment, the pilot signal used for measurement may include a discovery signal DRS; the DRS may be a primary synchronization signal PSS, a secondary synchronization signal SSS, a CRS, or a channel state reference signal CSI-RS, etc., which are not limited herein. The pilot signal used for measurement may also include CRS and DRS, and the wireless node monitors the DRS sent by the neighbor base station in the off state, and monitors the CRS sent by the neighbor base station in the on state.

203. According to the RSRP values of the neighboring base stations, the wireless node selects M base stations with the highest RSRP values from the neighboring base stations whose RSRP values exceed a predetermined power threshold to join the cooperation set;

204. The wireless node notifies the target base station of the information of the coordination set, so as to determine the coordination set of base stations of the wireless node.

In this embodiment, the information of the cooperative set may include the base station identification information of each coordinated base station and the load information of each coordinated base station, which is not limited here; the wireless node notifies the target base station of the information of the coordinated set, and communicates with the target base station interaction to determine the cooperating set of wireless nodes.

In the embodiments shown in Fig. 1 and Fig. 2, the pilot signals used for measurement may include common reference signals CRS and DRS at the same time, and the wireless node listens to the pilot signals used for measurement sent by neighboring base stations, and determines each The RSRP value of the neighbor base station includes: the wireless node monitors the DRS sent by the neighbor base station in the off state according to the DRS configuration information; the wireless node monitors the CRS sent by the neighbor base station in the on state; the wireless node Determine the RSRP value of each neighboring base station of the wireless node according to the monitored DRS and CRS. Referring to Figure 3, an embodiment of the method for constructing a collaboration set in the embodiment of the present invention includes:

301. The wireless node acquires DRS configuration information of nodes supporting on/off operations in the network;

In this embodiment, the DRS configuration information includes the type of the DRS signal, the transmission period of the DRS signal, and the offset information of the DRS signal.

In this embodiment, the wireless node may be various wireless devices such as a base station or a user equipment, which is not limited here.

When the wireless node is a base station, the wireless node acquiring the DRS configuration information of a node supporting on/off operation in the network may include:

The base station directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off operation support information in the network from the central control node through the backhaul link. The DRS configuration information of the node, or obtain the DRS configuration information of the node supporting the on/off operation in the network through the information interface (which can be a wired interface or a wireless interface) with the adjacent base station supporting the on/off operation. For example, if several combinations of DRS signal types/sending periods and offsets are specified in the standard protocol, the base station may acquire the above DRS configuration information in a blind detection manner.

When the wireless node is a user equipment UE, the wireless node obtaining the DRS configuration information of a node supporting on/off operation in the network may include:

The UE directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off support information in the network through the notification information of the serving base station corresponding to the UE. The DRS configuration information of the node operated by /off. For example, the UE acquires the DRS configuration information of the nodes supporting the on/off operation in the network through the RRC signaling sent by the serving base station.

302. According to the DRS configuration information, the wireless node monitors the DRS sent by the neighbor base station in the off state;

In this embodiment, the pilot signal used for measurement includes a discovery signal DRS; the DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), a secondary synchronization signal (Secondary Synchronization Signal, SSS), a CRS or a channel state reference signal ( Channel-StateInformation Reference signal, CSI-RS) etc.), not limited here.

303. The wireless node monitors the CRS sent by the neighbor base station in the on state;

In the on state, the neighbor base station will send a CRS every subframe. When it is in the off state, the neighbor base station will send a discovery signal (Discovery Reference Signal, DRS) at a relatively large periodic interval (for example, 20ms). The DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), secondary synchronization signal (Secondary Synchronization Signal, SSS), CRS or channel state reference signal (Channel-State Information Reference signal, CSI-RS) etc.).

For CRS listening, the wireless node can send CRS at the time-frequency position of other cells in any N subframes; for DRS listening, the wireless node can send DRS in each neighboring base station within N maximum DRS cycle duration on subframes. The maximum DRS period is the maximum value among the DRS periods of neighboring base stations around the wireless node.

304. The wireless node determines the RSRP value of each neighboring base station of the wireless node according to the monitored DRS and CRS;

According to the calculation formula of RSRP defined in the standard protocol, that is, the power of the received pilot information is used as the RSRP of the wireless node. Therefore, according to the DRS, the RSRP value of the neighbor base station in the off state of the neighbor base station of the wireless node can be determined, according to The CRS can determine the RSRP value of the neighbor base station in the on state among the neighbor base stations of the wireless node.

305. According to the RSRP values of the neighboring base stations, the wireless node selects M base stations with the highest RSRP values from the neighboring base stations whose RSRP values exceed a predetermined power threshold to join the cooperation set;

306. The wireless node notifies the target base station of the information of the coordination set, so as to determine the coordination set of base stations of the wireless node.

In this embodiment, the information of the cooperative set includes the base station identification information of each coordinated base station and the load information of each coordinated base station, and the wireless node notifies the target base station of the information of the coordinated set, and interacts with the target base station to determine the wireless A collaborative collection of nodes.

The wireless nodes described in Fig. 1 to Fig. 3 may be base stations or user equipment UEs. The following details are introduced in conjunction with specific embodiments. Please refer to Fig. 4. An embodiment of the method for constructing a cooperative set in the embodiments of the present invention includes :

401. The base station acquires DRS configuration information of nodes supporting on/off operations in the network;

In this embodiment, the DRS configuration information includes the type of the DRS signal, the transmission period of the DRS signal, and the offset information of the DRS signal.

In this embodiment, the acquisition by the base station of the DRS configuration information of nodes supporting on/off operations in the network may include:

The base station directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off operation support information in the network from the central control node through the backhaul link. The DRS configuration information of the node, or obtain the DRS configuration information of the node supporting the on/off operation in the network through the information interface (which can be a wired interface or a wireless interface) with the adjacent base station supporting the on/off operation. For example, if several combinations of DRS signal types/sending periods and offsets are specified in the standard protocol, the base station may acquire the above DRS configuration information in a blind detection manner.

402. According to the DRS configuration information, the base station monitors the DRS sent by the neighbor base station in the off state;

In this embodiment, the pilot signal used for measurement includes a discovery signal DRS; the DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), a secondary synchronization signal (Secondary Synchronization Signal, SSS), a CRS or a channel state reference signal ( Channel-StateInformation Reference signal, CSI-RS) etc.), not limited here.

403. The base station monitors the CRS sent by the neighbor base station in the on state;

In the on state, the neighbor base station will send a CRS every subframe. When it is in the off state, the neighbor base station will send a discovery signal (Discovery Reference Signal, DRS) at a relatively large periodic interval (for example, 20ms). The DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), secondary synchronization signal (Secondary Synchronization Signal, SSS), CRS or channel state reference signal (Channel-State Information Reference signal, CSI-RS) etc.).

For monitoring of CRS, the base station can transmit CRS at the time-frequency position of other cells in any N subframes; for monitoring of DRS, the base station can transmit in each neighboring base station within N maximum DRS cycle durations It is performed on the subframe of the DRS. The maximum DRS period is the maximum value among the DRS periods of neighboring base stations around the wireless node.

404. The base station determines the RSRP value of each neighbor base station of the wireless node according to the monitored DRS and CRS;

According to the calculation formula of RSRP defined on the standard protocol, that is, the power of the received pilot information is used as the RSRP of the base station. Therefore, according to the DRS, the RSRP value of the neighbor base station in the off state of the neighbor base station of the base station can be determined, according to The CRS may determine the RSRP values of neighbor base stations in the on state among the neighbor base stations of the base station.

405. According to the RSRP values of the neighbor base stations, the base station selects M base stations with the highest RSRP values from the neighbor base stations whose RSRP values exceed a predetermined power threshold to join the cooperation set;

406. The base station notifies the M base stations in the cooperation set of the information of the cooperation set, so that each coordinated base station sends a feedback confirmation message to the base station when confirming to join the cooperation set;

In this embodiment, the information of the coordination set includes base station identification information of each coordinated base station, load information of each coordinated base station, and signaling requesting to join the coordination set.

The manner in which the base station notifies the information of the cooperation set to the M base stations in the cooperation set may be:

(1) The base station sends the coordinated base station ID information of the base station to the central control node, and the central control node notifies each coordinated base station.

(2) The base station sends information requesting to join the cooperative set to each coordinated base station through an information exchange interface with the coordinated base station, such as an X2 interface.

407. The base station receives the feedback acknowledgment message from the coordinated base station, and adds the coordinated base station that has fed back the acknowledgment message to the coordinated base station list of the base station, and establishes a coordinated base station set.

Corresponding to 406, the two ways in which the base station notifies the M base stations in the cooperation set of the information of the cooperation set are different here:

(1) When the cooperative base station (for example, Node 1) confirms that it can join the cooperative set, it feeds back a confirmation message to the central control node, and the base station receives the feedback confirmation message from the cooperative base station sent by the central control node, and sends the cooperative The base station joins the coordinated base station list of the base station to establish a coordinated base station set. For example, after the central control node receives the confirmation message from Node 1, it feeds back to Node 0 the information that Node 1 confirms joining the collaborative set. In the cooperative base station list of the base station (Node 0).

(2) When the cooperative base station (for example, Node 1) confirms that it can join the cooperative set, a confirmation message is fed back through the information exchange interface with the base station, and the cooperative base station is listed in the cooperative base station list of the base station at the same time. For example, after the base station (Node 0) receives the confirmation message from the cooperative base station (Node 1), Node 1 is included in the cooperative base station list of the base station (Node 0).

The following describes an embodiment when the wireless node is a UE. Please refer to FIG. 5. An embodiment of the method for constructing a cooperative set in the embodiment of the present invention includes:

501. The UE obtains the DRS configuration information of the node supporting the on/off operation in the network;

In this embodiment, the DRS configuration information includes the type of the DRS signal, the transmission period of the DRS signal, and the offset information of the DRS signal.

In this embodiment, the UE obtaining the DRS configuration information of the nodes supporting on/off operation in the network includes:

The UE directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario stipulated in the standard protocol, or obtains the on/off support information in the network through the notification information of the serving base station corresponding to the UE. The DRS configuration information of the node operated by /off.

502. According to the DRS configuration information, the UE monitors the DRS sent by the neighbor base station in the off state;

In this embodiment, the pilot signal used for measurement includes a discovery signal DRS; the DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), a secondary synchronization signal (Secondary Synchronization Signal, SSS), a CRS or a channel state reference signal ( Channel-StateInformation Reference signal, CSI-RS) etc.), not limited here.

503. The UE monitors the CRS sent by the neighbor base station in the on state;

In the on state, the neighbor base station will send a CRS every subframe. When it is in the off state, the neighbor base station will send a discovery signal (Discovery Reference Signal, DRS) at a relatively large periodic interval (for example, 20ms). The DRS may be a primary synchronization signal (Primary Synchronization Signal, PSS), secondary synchronization signal (Secondary Synchronization Signal, SSS), CRS or channel state reference signal (Channel-State Information Reference signal, CSI-RS) etc.).

For CRS monitoring, the UE can send CRS at the time-frequency position of other cells in any N subframes; for DRS monitoring, the UE can send DRS in each neighboring base station within N maximum DRS cycle durations on subframes. The maximum DRS period is the maximum value among the DRS periods of neighboring base stations around the wireless node.

504. The UE determines the RSRP value of each neighboring base station of the wireless node according to the monitored DRS and CRS;

According to the calculation formula of RSRP defined in the standard protocol, that is, the power of the received pilot information is used as the RSRP of the base station. Therefore, according to the DRS, the RSRP value of the neighbor base station in the off state of the neighbor base station of the UE can be determined, according to The CRS may determine the RSRP values of neighbor base stations in the on state among the neighbor base stations of the UE.

505. According to the RSRP values of the neighbor base stations, the UE selects M base stations with the highest RSRP values from the neighbor base stations whose RSRP values exceed the predetermined power threshold to join the cooperation set;

506. The UE sends the information of the coordination set to the serving base station of the UE, so that the serving base station establishes a coordinated base station set according to the information of the coordination set.

The manner in which the serving base station of the UE notifies the M base stations in the cooperation set of the information of the cooperation set may be:

(1) The serving base station sends the coordinated base station ID information of the base station to the central control node, and the central control node notifies each coordinated base station.

When the cooperative base station (for example, Node 1) confirms that it can join the cooperative set, it feeds back a confirmation message to the central control node, and the serving base station receives the feedback confirmation message of the cooperative base station sent by the central control node, and joins the cooperative base station that has fed back the confirmation message The coordinated base station list of the UE establishes a coordinated base station set. For example, after the central control node receives the confirmation message from Node 1, it feeds back the information that Node 1 confirms joining the collaboration set to the serving base station Node0, and Node 0 includes Node 1 after receiving the confirmation message from Node 1 sent by the central control node. to the coordinated base station list of the UE.

(2) The serving base station sends information requesting to join the cooperative set to each coordinated base station through an information exchange interface with the coordinated base station, such as an X2 interface.

When the coordinated base station (for example, Node 1) confirms that it can join the coordinated set, it feeds back a confirmation message through the information exchange interface with the serving base station, and at the same time lists the coordinated base station in the coordinated base station list of the UE. For example, after receiving the confirmation message from the cooperative base station (Node 1), the serving base station (Node 0) includes Node 1 in the list of coordinated base stations of the UE.

In this embodiment, the information of the coordination set includes base station identification information and load information of each coordinated base station, and the UE sends the information of the coordination set to the serving base station of the UE, so that the serving base station Establish a cooperative base station set based on the information of the cooperative set.

In the embodiments shown in Fig. 1 to Fig. 5, the base station periodically monitors the pilot signal used for measurement sent by the neighbor base station; The RSRP value of the pilot signal measured by some cooperative base stations becomes smaller due to power changes or changes in channel conditions, which cannot meet the requirements of cooperation, and the cooperative base station is deleted from the cooperative base station list; when there is a new base station When the cooperation condition is satisfied, that is, when the RSRP value of the new base station detected according to DRS or CRS meets the requirements, the wireless node re-determines the RSRP value of each neighbor base station according to the pilot signal, and according to the RSRP value of each neighbor base station The value re-establishes the set of cooperating base stations.

For example, when the wireless node is a UE, the UE periodically monitors the CRS/DRS of surrounding base stations. The serving base station Node 0 reports the information, and Node 0 deletes the cooperative base station from the cooperative base station list of UE 0 after receiving the information. When it is found that there is a new base station that satisfies the cooperation condition, steps 504-506 are repeated to add the base station into the list of coordinated base stations of the UE.

The following is an introduction from the side of the serving base station. Please refer to FIG. 6. An embodiment of the method for constructing a cooperative set in the embodiment of the present invention includes:

601. The serving base station receives the information of the cooperation set sent by the user equipment UE, where the information of the cooperation set includes the base station identification information of each coordinated base station;

602. The serving base station sends, according to the base station identification information of each coordinated base station, signaling requesting to join the cooperative set to each coordinated base station, so that each coordinated base station sends a feedback confirmation message to the serving base station when confirming to join the coordinated set ;

In this embodiment, according to the base station identification information of each coordinated base station, the serving base station sends a signaling request to join the cooperative set to each coordinated base station through the central control node; the serving base station can also directly pass through the interaction interface with the coordinated base station, For example, the X2 interface sends signaling requesting to join the cooperative set to each coordinated base station, which is not limited here.

603. The serving base station receives the feedback acknowledgment message from the coordinated base station, and adds the base station that has fed back the acknowledgment message to the coordinated base station list of the UE, and establishes a coordinated base station set.

Corresponding to step 602, the serving base station may receive the feedback confirmation message of the cooperative base station through the central control node, or may directly receive the feedback confirmation message of the cooperative base station through an interactive interface with the cooperative base station, such as the X2 interface, where Not limited.

The following describes the embodiment of the wireless node in the embodiment of the present invention, please refer to FIG. 7, an embodiment of the wireless node 700 in the embodiment of the present invention includes:

The first determining unit 701 is configured to monitor the pilot signal sent by the neighbor base station for measurement, and determine the reference signal received power RSRP value of each neighbor base station;

The selecting unit 702 is configured to select M base stations with the highest RSRP values among the neighboring base stations whose RSRP values exceed a predetermined power threshold according to the RSRP values of the neighboring base stations to join the cooperative set;

The second determining unit 703 is configured to notify the target base station of the information of the cooperating set, so as to determine the cooperating base station set of the wireless node.

Optionally, the wireless node may also include:

The acquiring unit 704 is configured to acquire discovery signal DRS configuration information of a node supporting on/off operation in the network before the wireless node monitors the pilot signal for measurement sent by the neighbor base station, and the DRS configuration information includes the type of the DRS signal , the transmission period of the DRS signal, and the offset information of the DRS signal.

Optionally, the pilot signal used for measurement further includes a common reference signal CRS;

The first determining unit 701 is specifically configured to, according to the DRS configuration information, monitor the DRS sent by the neighbor base station in the off state; monitor the CRS sent by the neighbor base station in the on state; according to the monitored DRS and CRS, Determine the RSRP value of each neighboring base station of the wireless node.

Optionally, when the wireless node is a base station, the acquiring unit is specifically configured to directly acquire the predefined DRS configuration information, that is, directly acquire the DRS configuration information used in the on/off scenario specified in the standard protocol, or Obtain the DRS configuration information of the nodes supporting on/off operation in the network from the central control node through the backhaul link, or obtain the information interface of the nodes supporting on/off operation in the network through the information interface with the adjacent base station supporting on/off operation DRS configuration information.

Optionally, when the wireless node is a user equipment UE, the acquiring unit is specifically configured to directly acquire predefined DRS configuration information, that is, directly acquire the DRS configuration information used in the on/off scenario specified in the standard protocol , or obtain the DRS configuration information of the node supporting the on/off operation in the network through the notification information of the serving base station corresponding to the UE.

Optionally, when the wireless node is a base station, the second determination unit 703 is specifically configured to separately notify the M base stations in the cooperation set of the information of the cooperation set, so that each cooperation base station confirms joining Sending a feedback acknowledgment message to the base station during the cooperative set, where the information of the cooperative set includes base station identification information of each coordinated base station, load information, and signaling requesting to join the cooperative set;

The second determining unit 703 is further configured to receive a feedback acknowledgment message from the coordinated base station, and add the coordinated base station that has fed back the acknowledgment message to the coordinated base station list of the base station to establish a coordinated base station set.

Optionally, when the wireless node is a UE, the second determining unit 703 is specifically configured to send the information of the cooperation set to the serving base station of the UE, so that the serving base station The information of the coordinated base station is used to establish a coordinated base station set, and the information of the coordinated base station includes the base station identification information of each coordinated base station and the load information of each coordinated base station.

The following introduces an embodiment of the serving base station in the embodiment of the present invention. Please refer to FIG. 8. An embodiment of the serving base station 800 in the embodiment of the present invention includes:

The receiving unit 801 is configured to receive the information of the cooperation set sent by the user equipment UE, where the information of the cooperation set includes the base station identification information of each coordinated base station;

The sending unit 802 is configured to, according to the base station identification information of each coordinated base station, send signaling requesting to join the cooperative set to each coordinated base station, so that each coordinated base station sends a feedback confirmation message to the coordinated base station when confirming to join the coordinated set Serving Base Station;

The receiving unit 801 is further configured to receive feedback confirmation messages from coordinated base stations, and add base stations that have fed back confirmation messages to the coordinated base station list of the UE to establish a coordinated base station set.

Optionally, the sending unit 802 is specifically configured to, according to the base station identification information of each coordinated base station, send signaling requesting to join the coordinated set to each coordinated base station through the central control node;

The receiving unit 801 is specifically configured to receive a feedback acknowledgment message from a coordinated base station through the central control node.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (19)

1. build a method for cooperation set, it is characterized in that, described method comprises:

Radio node monitors the pilot signal for measuring that neighbor base stations sends, and determines the Reference Signal Received Power RSRP value of each neighbor base stations;

Described radio node, according to the RSRP value of described each neighbor base stations, exceedes in RSRP value in the neighbor base stations of predetermined power thresholding, chooses M the highest base station of RSRP value and adds cooperation set;

The message notice target BS that described cooperation is gathered by described radio node, to determine the cooperative base station set of described radio node.

2. method according to claim 1, is characterized in that, described radio node monitor that neighbor base stations sends for before the pilot signal measured, described method also comprises:

Described radio node obtains the DRS configuration information of the node supporting on/off to operate in network, and described DRS configuration information comprises the kind of DRS signal, the transmission cycle of DRS signal, the offset information of DRS signal.

3. according to the method described in claim 2, it is characterized in that, the described pilot signal for measuring also comprises public reference signal CRS and finds signal DRS; ;

Described radio node monitors the pilot signal for measuring that neighbor base stations sends, and determines that the RSRP value of each neighbor base stations comprises:

Described radio node, according to described DRS configuration information, is monitored and is in the DRS that neighbor base stations sends under off state;

Described radio node monitors the CRS being in neighbor base stations under on state and sending;

Described radio node, according to DRS and CRS of described monitoring, determines the RSRP value of each neighbor base stations of described radio node.

4. according to the method in claim 2 or 3, it is characterized in that, when described radio node is base station, the DRS configuration information that described radio node obtains the node supporting on/off to operate in network comprises:

Described base station directly obtains predefined DRS configuration information, or obtained network the DRS configuration information of the node supporting on/off to operate from center control nodes by back haul link, or by with the adjacent DRS configuration information supporting the information interface operating the base station that on/off operates to obtain in network to support the node that on/off operates.

5. according to the method in claim 2 or 3, it is characterized in that, when described radio node is user equipment (UE), the DRS configuration information that described radio node obtains the node supporting on/off to operate in network comprises:

Described UE directly obtains predefined DRS configuration information, or passes through the announcement information of serving BS corresponding to described UE, obtains the DRS configuration information of the node supporting on/off to operate in network.

6., according to described method arbitrary in claims 1 to 3, it is characterized in that, when described radio node is base station, the message notice target BS that described cooperation is gathered by described radio node, to determine that the cooperative base station set of described radio node comprises:

The information of described cooperation set is notified M base station in described cooperation set by described base station respectively, to make each cooperative base station transmission feeding back confirmation message extremely described base station when confirming to add described cooperation set, the information of described cooperation set comprises the base station identification information of each cooperative base station, and load information and request add the signaling of cooperation set;

Described base station receives the feeding back confirmation message of cooperative base station, and the cooperative base station of feeding back confirmation message is added the cooperative base station list of described base station, sets up cooperative base station set.

7. method according to claim 6, is characterized in that, the information of described cooperation set is notified that M base station in described cooperation set comprises by described base station respectively:

The information of described cooperation set is notified described M the base station cooperated in set by center control nodes by described base station respectively;

The feeding back confirmation message that described base station receives each cooperative base station comprises:

Described base station receives the feeding back confirmation message of each cooperative base station by described center control nodes.

8., according to described method arbitrary in claims 1 to 3, it is characterized in that, when described radio node is UE, the message notice target BS that described cooperation is gathered by described radio node, to determine that the cooperative base station set of described radio node comprises:

The information of described cooperation set is sent to the serving BS of described UE by described UE, to make described serving BS set up cooperative base station set according to the information of described cooperation set, the information of described cooperation set comprises the base station identification information of each cooperative base station and the load information of each cooperative base station.

9. build a method for cooperation set, it is characterized in that, comprising:

Serving BS receives the information of the cooperation set that user equipment (UE) sends, and the information of described cooperation set comprises the base station identification information of each cooperative base station;

Described serving BS, according to the base station identification information of described each cooperative base station, sends request the signaling adding cooperation set to each cooperative base station, send feeding back confirmation message to described serving BS to make each cooperative base station when confirmation adds described cooperation set;

Described serving BS receives the feeding back confirmation message of cooperative base station, and the base station of feeding back confirmation message is added the cooperative base station list of described UE, sets up cooperative base station set.

10. method according to claim 9, is characterized in that, described serving BS, according to the base station identification information of described each cooperative base station, sends request to each cooperative base station the signaling adding cooperation set and comprises:

Described serving BS, according to the base station identification information of described each cooperative base station, sends request the signaling adding cooperation set to each cooperative base station by center control nodes;

The feeding back confirmation message that described serving BS receives cooperative base station comprises:

Described serving BS receives the feeding back confirmation message of cooperative base station by described center control nodes.

11. 1 kinds of radio nodes, is characterized in that, comprising:

First determining unit, for monitoring the pilot signal for measuring that neighbor base stations sends, determines the Reference Signal Received Power RSRP value of each neighbor base stations;

Choose unit, for the RSRP value according to described each neighbor base stations, exceed in RSRP value in the neighbor base stations of predetermined power thresholding, choose M the highest base station of RSRP value and add cooperation set;

Second determining unit, for the message notice target BS by described cooperation set, to determine the cooperative base station set of described radio node.

12. radio nodes according to claim 11, is characterized in that, described radio node also comprises:

Acquiring unit, described radio node monitor that neighbor base stations sends for before the pilot signal measured, obtain in network the discovery signal DRS configuration information of the node supporting on/off to operate, described DRS configuration information comprises the kind of DRS signal, the transmission cycle of DRS signal, the offset information of DRS signal.

13. radio nodes according to claim 12, is characterized in that, the described pilot signal for measuring also comprises public reference signal CRS and finds signal DRS;

Described first determining unit specifically for according to described DRS configuration information, monitors the DRS being in neighbor base stations under off state and sending; Monitor and be in the CRS that neighbor base stations sends under on state; According to DRS and CRS of described monitoring, determine the RSRP value of each neighbor base stations of described radio node.

14. methods according to claim 12 or 13, it is characterized in that, when described radio node is base station, described acquiring unit is specifically for directly obtaining predefined DRS configuration information, or obtained network the DRS configuration information of the node supporting on/off to operate from center control nodes by back haul link, or by with the adjacent DRS configuration information supporting the information interface operating the base station that on/off operates to obtain in network to support the node that on/off operates.

15. methods according to claim 12 or 13, it is characterized in that, when described radio node is user equipment (UE), described acquiring unit is specifically for directly obtaining predefined DRS configuration information, or pass through the announcement information of serving BS corresponding to described UE, obtain the DRS configuration information of the node supporting on/off to operate in network.

16. according to claim 11 to described radio node arbitrary in 13, it is characterized in that, when described radio node is base station, described second determining unit is specifically for notifying M base station in described cooperation set respectively by the information of described cooperation set, to make each cooperative base station transmission feeding back confirmation message extremely described base station when confirming to add described cooperation set, the information of described cooperation set comprises the base station identification information of each cooperative base station, and load information and request add the signaling of cooperation set;

The cooperative base station of feeding back confirmation message also for receiving the feeding back confirmation message of cooperative base station, and is added the cooperative base station list of described base station by described second determining unit, sets up cooperative base station set.

17. according to claim 11 to described radio node arbitrary in 13, it is characterized in that, when described radio node is UE, described second determining unit is specifically for sending to the serving BS of described UE by the information of described cooperation set, to make described serving BS set up cooperative base station set according to the information of described cooperation set, the information of described cooperation set comprises the base station identification information of each cooperative base station and the load information of each cooperative base station.

18. 1 kinds of serving BSs, is characterized in that, comprising:

Receiving element, for receiving the information of the cooperation set that user equipment (UE) sends, the information of described cooperation set comprises the base station identification information of each cooperative base station;

Transmitting element, for the base station identification information according to described each cooperative base station, sends request the signaling adding cooperation set to each cooperative base station, send feeding back confirmation message to described serving BS to make each cooperative base station when confirmation adds described cooperation set;

The base station of feeding back confirmation message also for receiving the feeding back confirmation message of cooperative base station, and is added the cooperative base station list of described UE by described receiving element, sets up cooperative base station set.

19. serving BSs according to claim 18, is characterized in that, described transmitting element, specifically for the base station identification information according to described each cooperative base station, sends request the signaling adding cooperation set to each cooperative base station by center control nodes;

Described receiving element is specifically for receiving the feeding back confirmation message of cooperative base station by described center control nodes.