CN101394647B - Method and system for realizing cell networking - Google Patents

Abstract

The invention discloses a method for realizing cell networking, which is used for realizing flexible planning of cells and cell networking in various forms, improving the frequency spectrum utilization rate or saving network resources. The method includes cell splitting and cell merging. The cell splitting method and the cell merging method comprise cell establishment and cell deletion. The cell splitting method comprises the following steps: counting physical resource occupation conditions on a plurality of antennas corresponding to the same cell; determining that the duration of occupied physical resources in a preset time is not less than a preset threshold value, and determining that cell splitting is required when the preset time is reached; and splitting the same cell into at least two cells, and respectively configuring the plurality of antennas to the at least two cells. The cell merging method is similar to the cell splitting method. The invention also discloses a device for planning the cell, the distributed base station and the internal units thereof.

Description

A method and system for realizing community networking

technical field

The invention relates to the communication field, in particular to a method and a system for realizing community networking.

Background technique

In the current prior art, a common antenna or a smart antenna including multiple antenna units corresponds to a cell. With the rapid development of communication users and communication services, the existing cell resources can no longer meet the demand. In order to expand the communication system, one way is to increase the number of antennas to increase the cell resources. The signals are merged into one signal.

In traditional base station systems, analog signals are transmitted between the baseband and transceivers. The analog signal can be superimposed directly through the transmission line and sent to the baseband side for processing. However, during the transmission of the analog signal, the analog signal will continue to attenuate as the transmission distance increases. In the process of long-distance transmission of analog signals, relay equipment (such as dry amplifier stations) is usually used to amplify the analog signals to achieve coverage without blind spots. The quality is seriously affected, and there is a greater power consumption, and the relay equipment is not easy to maintain.

At present, a remote radio frequency technology appears in the prior art, which remotes the radio frequency unit in the base station and places it near the antenna. In this way, one baseband unit (BBU) can be connected to multiple remote radio units (RRU). Due to the limitation of the existing hardware level, the baseband demodulation of the BBU can only support multiple radio frequency units that do not exceed the design capacity. Antennas, for example, a BBU supports up to 6 subcarriers (indicated by C) and 8 antennas (indicated by A), and supports up to 48 channels of signals. Due to some defects in the analog signal, it is considered to increase the number of antennas to achieve no-blind coverage, but the processing capability of a BBU is limited, so it is necessary to increase the BBU to realize the expansion of the communication system. However, the cost of the BBU is relatively high, which brings pressure to the expansion work. Moreover, antennas and corresponding RRUs need to be artificially added each time the communication system is expanded, and BBUs may be further added, which takes up more human resources. If more antennas and cells are built at the initial stage of network construction, it will lead to waste of communication system resources.

It can be seen that in order to meet the needs of the development of communication services in the existing technology, one way is to support more semaphores by superimposing analog signals to achieve coverage without blind spots. However, this way has a short transmission distance and is affected by noise signals. Interfering issues. Another way is to continuously expand the communication system manually, but requires more human resources. Another way is to build more antennas and cells at the initial stage of network construction, but this leads to waste of communication system resources.

Contents of the invention

Embodiments of the present invention provide a method and system for realizing community networking, which are used to realize flexible planning of communities and various forms of community networking, improve frequency spectrum utilization or save network resources.

A cell deletion method of a distributed base station, comprising the following steps:

Delete the common channel and dedicated channel on at least one antenna among the multiple antennas corresponding to the same cell;

Setting the state of the cell and the common channel on the at least one antenna to non-existent;

The wireless link on the at least one antenna is removed.

A cell splitting method, comprising the following steps:

Counting the physical resource occupancy of multiple antennas corresponding to the same cell, where there are RRUs corresponding to multiple cells in the RRUs corresponding to the multiple antennas;

Determining that the occupied physical resource within the preset time is continuously not less than the preset threshold, and determining that cell splitting is required when the preset time is reached;

Splitting the same cell into at least two cells, and configuring the multiple antennas to the at least two cells respectively; the step of splitting the same cell into at least two cells includes: deleting the corresponding same cell and configure different cell resources for the multiple antennas; or, delete the cell resources on some antennas among the multiple antennas corresponding to the same cell, and configure A cell resource other than said same cell.

A cell merging method, comprising the steps of:

Statistics of physical resource occupancy in each community;

Determining that there are at least two cells, and for each of the at least two cells, the occupied physical resources within the preset time are not greater than the preset threshold, and the at least two cells reach the preset threshold When the time is determined, it is necessary to merge the cells;

Merge the at least two cells into one cell, configure the multiple antennas corresponding to the original at least two cells as the one cell, and there are RRUs corresponding to multiple cells in the RRUs corresponding to the multiple antennas; The step of merging the at least two cells into one cell includes: deleting the cell resources on the antennas corresponding to the at least two cells, and then configuring the same cell resources for multiple antennas under the at least two cells; or deleting For the cell resource on the antenna corresponding to one cell in the at least two cells, the same cell resource as that of the other cell is configured for the antenna corresponding to the one cell.

A device for planning a cell network, comprising:

A statistical unit, configured to count the physical resource occupancy of multiple antennas corresponding to the same cell, where there are RRUs corresponding to multiple cells in the RRUs corresponding to the multiple antennas;

A control unit, configured to determine that the occupied physical resources within a preset time are continuously not less than a preset threshold, and determine that cell splitting is required when the preset time is reached;

A configuration unit, configured to split the same cell into at least two cells, and configure the multiple antennas to the at least two cells respectively; splitting the same cell into at least two cells is specifically used for: deleting The cell resources on the multiple antennas corresponding to the same cell, and configuring different cell resources for the multiple antennas respectively; or, deleting the cell resources on a part of the multiple antennas corresponding to the same cell, and The configuration of the part of antennas is different from the cell resources of the same cell.

A RRU comprising:

External interface unit for receiving and sending messages;

The radio frequency unit is used to connect multiple antennas, receive radio frequency signals from the multiple antennas and send radio frequency signals to the multiple antennas;

A configuring unit, configured to configure the connected multiple antennas as at least one cell according to the received cell establishment request message, and configure at least one of the multiple antennas on the multiple antennas according to the received cell deletion request message Cell resources are deleted.

A distributed base station, comprising:

An antenna for receiving and transmitting analog radio frequency signals;

The radio remote unit RRU is connected to multiple antennas, and is used to configure at least one cell for the connected multiple antennas according to the received cell establishment request message, and to configure multiple antennas under the same cell according to the received cell deletion request message. Cell resource deletion on at least one of the antennas;

The baseband unit BBU is used to process digital signals from the RRU.

A distributed base station, comprising:

An antenna for receiving and transmitting analog radio frequency signals;

A plurality of RRUs are respectively used to configure cell resources for a locally connected antenna according to the received cell establishment request message, and delete the cell resources on the locally connected antenna according to the received cell deletion request message; , the multiple antennas of the multiple RRUs are configured with the same cell resources;

The BBU is used to process digital signals from the RRU.

A distributed base station, comprising:

An antenna for receiving and transmitting analog radio frequency signals;

The radio remote unit RRU is connected to multiple antennas, and is used to convert analog radio frequency signals from multiple antennas into digital signals and then send them, wherein the multiple antennas correspond to the same cell, or one of the multiple antennas Each part of the antenna corresponds to a different cell;

The baseband unit BBU is used to process digital signals from the RRU.

A distributed base station, comprising:

An antenna for receiving and transmitting analog radio frequency signals;

A plurality of RRUs, each RRU includes an antenna, which is used to convert the analog radio frequency signal from the antenna into a digital signal and then send it; wherein, the multiple antennas of the multiple RRUs correspond to the same cell;

The BBU is used to process digital signals from the RRU.

A device for combining cells, comprising:

A statistical unit, used to count the occupation of physical resources in each cell;

A control unit, configured to determine that there are at least two cells, and for each of the at least two cells, the occupied physical resources within a preset time period are not greater than a preset threshold, and in the at least two cells When both reach the preset time, it is determined that the cells need to be merged;

A configuration unit, configured to merge the at least two cells into one cell, configure the multiple antennas corresponding to the original at least two cells as the one cell, and there are corresponding multiple antennas in the RRU corresponding to the multiple antennas The RRU of the cell is specifically used for merging the at least two cells into one cell: deleting the cell resources on the antennas corresponding to the at least two cells, and then configuring the same antennas for the multiple antennas under the at least two cells Cell resources; or, delete the cell resources on the antenna corresponding to one of the at least two cells, and then configure the same cell resources as the other cell for the antenna corresponding to the one cell.

The physical resources include transmit power and/or code channel resources.

The embodiment of the present invention provides a method for cell planning, including cell deletion, cell splitting, and cell merging, which realizes flexible networking of cells, and can perform dynamic cell planning and networking according to the actual environment, saving human resources or improving communication transmission quality. Moreover, the embodiment of the present invention provides a device for planning a cell, a distributed base station, etc., and realizes flexible cell networking.

Description of drawings

1A-8 are structural diagrams of distributed base stations in an embodiment of the present invention;

FIG. 9 is a flow chart of the main method for establishing a cell in an embodiment of the present invention;

FIG. 10 is a flowchart of a method for establishing a cell when the RNC initiates cell establishment in an embodiment of the present invention;

FIG. 11 is a flowchart of a method for establishing a cell when the OMC initiates cell establishment in an embodiment of the present invention;

FIG. 12 is a flowchart of a method for establishing a cell when an evolved base station initiates cell establishment in an embodiment of the present invention;

Fig. 13 is a flow chart of the main method of cell deletion in the embodiment of the present invention;

FIG. 14 is a flow chart of a specific method for cell deletion in an embodiment of the present invention;

Fig. 15 is a flow chart of the main method of cell splitting in the embodiment of the present invention;

FIG. 16A is a flowchart of a specific method for cell splitting according to transmission power in an embodiment of the present invention;

FIG. 16B is a flow chart of a specific method for cell splitting according to code channel resources in an embodiment of the present invention;

FIG. 17 is a flowchart of a method for merging cells in an embodiment of the present invention;

FIG. 18 is a basic structural diagram of an RRU in an embodiment of the present invention;

FIG. 19 is a detailed structural diagram of the RRU in the embodiment of the present invention;

FIG. 20 is a structural diagram of a cell planning unit in an embodiment of the present invention;

Fig. 21 is a structural diagram of the RNC in the embodiment of the present invention.

Detailed ways

According to the actual environment, the embodiments of the present invention make multiple antennas correspond to one cell to save cell resources, or make multiple antennas correspond to multiple cells to meet the needs of communication services or communication users.

The cell resources in the embodiment of the present invention include local cell identifiers, training sequences, and physical resources, and the physical resources include transmit power, code channel resources, and the like.

The distributed base station (referred to as the base station) in the embodiment of the present invention includes the base station (Node B) under the Universal Mobile Telecommunications System (Universal Mobile Telecommunication System, UMTS) and the evolved base station (Evolved Base Station) under the Long Time Evolution (Long Time Evolution, LTE) system. NodeB). The antennas in the embodiments of the present invention include ordinary antennas, smart antennas with multiple antenna units, non-smart antennas (such as polarized antennas), and the like. In this embodiment, one antenna is determined as one channel, an RRU connected to multiple antennas is a multi-channel RRU, and an RRU connected to a single antenna is a single-channel RRU.

In the embodiment of the present invention, a distributed base station (referred to as a base station) includes an antenna, a BBU, and an RRU (including a multi-channel RRU and a single-channel RRU) for receiving and sending analog radio frequency signals. The distributed base station may include multiple RRUs, and the multiple RRUs may be connected in parallel, in series, or in a hybrid relationship. The hybrid relationship means that multiple RRUs forming a series relationship form a parallel relationship with one or more other RRUs, and all the RRUs in the series relationship and the parallel relationship together form a hybrid relationship. In the embodiment of the present invention, devices that can initiate cell establishment and cell deletion include a radio network controller (Radio Network Controller, RNC), an operation and maintenance center (Operation & Maintenance Center, OMC), and an evolved base station.

The BBU in the distributed base station is used for processing baseband digital signals. When the RNC or OMC plans the cell network, the BBU is also used to forward the cell establishment request message and the cell deletion request message sent by the RNC or OMC. When planning the cell network by the evolved base station, the distributed base station includes a cell planning unit 101, as shown in FIG. The request message and the cell deletion request message can be sent directly to the RRU, or forwarded to the RRU via the BBU. The cell planning unit 101 may also belong to the BBU, which is equivalent to planning the cell network by the BBU. Among them, there may be multiple BBUs, forming a BBU resource pool, and jointly providing services for connected RRUs.

The RRU is used to convert the analog radio frequency signals received by the connected multiple antennas into digital signals and then send them, and convert the received digital signals into analog radio frequency signals and then send them through multiple antennas, and the multiple antennas correspond to at least one cell. The RRU is further configured to configure at least one cell for the connected multiple antennas according to the received cell establishment request message, and delete cell resources on at least one of the multiple antennas according to the received cell deletion request message. An example of the connection between a BBU and a multi-channel RRU is shown in Figure 1B. Multiple multi-channel RRUs may also correspond to one cell, or some antennas on one multi-channel RRU and antennas on other multi-channel RRUs or single-channel RRUs may correspond to one cell. The multi-channel RRU can be connected with multiple single-channel RRUs and multiple RRUs in the prior art to form a series, parallel or hybrid relationship, and the multi-channel RRU, single-channel RRU and RRUs in the prior art can correspond to one cell .

Alternatively, the RRU is used to convert an analog radio frequency signal received by a connected antenna into a digital signal for transmission, and convert the received digital signal into an analog radio frequency signal for transmission through an antenna. The RRU is also used to configure a cell for a connected antenna according to the received cell establishment request message, and delete cell resources on the one antenna according to the received cell deletion request message. Multiple single-channel RRUs can correspond to one cell, and a connection example between a BBU and a single-channel RRU is shown in Figure 2. The single-channel RRU can be connected with a plurality of multi-channel RRUs or a plurality of RRUs in the prior art to form a series connection, a parallel connection or a hybrid connection.

One BBU can be connected to multiple RRUs. This embodiment provides an example of one BBU connected to multiple RRUs connected in series, as shown in FIG. 3 .

The distributed base station can also include one or more baseband interface units (BIU), as shown in Fig. The mesh form is more flexible.

It can be seen from the above embodiments that a BBU is connected with multiple antennas that exceed its design capability, and the BBU must process signals from more antennas within the scope of its design capability. This embodiment provides a method for combining digital signals from multiple antennas , so that the BBU can process multiple digital signals that meet the design capability.

The method of merging digital signals is: according to the principle of time synchronization, vector superposition of multiple digital signals corresponding to the same sub-carrier and the same cell is performed. The multi-channel digital signals corresponding to the same subcarrier and the same cell in the I component direction are superimposed according to the same time position, and the multiple digital signals corresponding to the same sub-carrier and the same cell in the Q component direction are superimposed according to the same time position Overlay operation. In this embodiment, the digital signal is regarded as a continuous combination of "1" and "0". For example, the data of one digital signal at a time point is 1100, and each "1" or "0" is a data. According to the same time point, the superposition of multiple digital signals is the bitwise addition of the data of the multiple digital signals, and the binary addition operation is performed. This embodiment is further explained through a mathematical model. Assuming that the digital signal at a certain time point is expressed in the form of an+jbn, a represents the data in the direction of the I component, j represents the data in the direction of the Q component, then b represents the data in the direction of the Q component, and n takes different values to identify each digital Signal. Then, the combination process of digital signals can be expressed as:

(a1+j*b1)+(a2+j*b2)+...+(an+j*bn)=(a1+a2+...+an)+j*(b1+b2+...+bn )

Multiple units inside the distributed base station can perform combination operation of digital signals, such as BBU, BIU and RRU can perform combination operation.

After understanding the structure of the distributed base station, the operation of cell planning can be carried out, including cell establishment and cell deletion.

Referring to FIG. 9, the main method flow of cell establishment in this embodiment is as follows:

Step 901: Assign the same local cell identity to at least two antennas.

Step 902: Configure maximum output power for the at least two antennas.

Step 903: Configuring training sequences, channel resources, etc. for the at least two antennas.

The process of the above method realizes that multiple antennas correspond to one cell, and the diversity or multiplexing technology of the MIMO system can be used to improve the transmission quality in the cell or improve the carrying capacity of the cell. The method for establishing a cell is described in detail below. The first case is that the RNC initiates a cell establishment process, as shown in FIG. 10 . The specific method flow is as follows:

Step 1001: RNC initiates a resource audit process, sends an audit request message to Node B, and notifies Node B to perform resource audit. Alternatively, the Node B periodically and proactively reports the audit results to the RNC.

Step 1002: The RNC determines that it is necessary to establish a cell according to the audit response message returned by the Node B.

Step 1003: RNC sends a cell establishment request message to Node B.

RNC can instruct Node B to configure cell resources for specific antennas by adding information elements in the cell establishment request message. Information elements such as (T1, T3, T5) indicate that the antennas marked as T1, T3 and T5 are configured the same Cell resources, that is, antennas T1, T3 and T5 correspond to the same cell. The information element about RRU can be further added, such as (R1(T1, T3, T5), R3(T1, T2, T4)), expressed as the antenna and the identification of T1, T3 and T5 on the RRU marked as R1 Configure the same cell resources for the antennas identified as T1, T2 and T4 on the RRU of R3. Or, the RNC instructs the Node B to configure the same cell resource (especially the same local cell ID) for multiple antennas by sending the cell establishment request message multiple times. Or, the RNC instructs the Node B to configure different cell resources (especially different local cell identities) for multiple antennas on one RRU by sending the cell setup request message multiple times.

The RNC can further instruct the Node B to configure multiple cells for one antenna by adding information elements in the cell establishment request message, such as configuring a single-frequency point cell.

Step 1004: Node B allocates the same local cell ID to multiple antennas according to the received cell establishment request message, and saves the allocation result. The local cell ID is a sign for distinguishing cells, and as long as the local cell IDs of two areas are different, the two areas belong to different cells.

The Node B can configure the corresponding antenna according to the antenna identification carried in the cell establishment request message. Or, when the cell establishment request message does not carry the antenna identifier, the Node B determines the antennas that need to be established in the cell according to the audit results, and configures the corresponding antennas according to the cell establishment request message.

Step 1005: Node B configures the maximum output power for multiple antennas according to the received cell establishment request message.

Step 1006: Node B configures channel resources for multiple antennas according to the received cell establishment request message, and establishes CPICH, PSCH, SSCH, PCCPCH, and BCH.

The second case is that the OMC initiates the cell establishment process, as shown in Figure 11, the specific method flow is as follows:

Step 1101: OMC triggers RNC to start cell establishment through a control message.

Step 1102: RNC sends a cell establishment request message to Node B after receiving the control message.

Step 1103: Node B allocates the same local cell ID to multiple antennas according to the received cell establishment request message, and saves the allocation result. Wherein, the Node B learns the antennas that need to be configured in the cell according to the received control message sent by the OMC.

Step 1104: Node B configures the maximum output power for multiple antennas according to the received cell establishment request message.

Step 1105: Node B configures channel resources for multiple antennas according to the received cell establishment request message.

The OMC can also trigger the evolved base station in the LTE system to start cell establishment, and the evolved base station performs cell configuration on corresponding multiple antennas according to the control message sent by the OMC to establish a cell.

The third case is that the evolved base station initiates the cell establishment process in the LTE system, as shown in Figure 12, and the specific method flow is as follows:

Step 1201: The eNB initiates cell establishment according to the status of physical resources and logical resources.

Step 1202: The eNB allocates the same local cell ID to multiple antennas, and saves the allocation result.

Step 1203: The evolved base station configures maximum output power for multiple antennas.

Step 1204: The eNB configures channel resources for multiple antennas.

Referring to Figure 13, the main method flow of cell deletion in this embodiment is as follows:

Step 1301: Delete the common channel and dedicated channel on at least one antenna among the multiple antennas corresponding to the same cell.

Step 1302: Set the state of the cell and the common channel on the at least one antenna as non-existent.

Step 1303: Remove the wireless link on the at least one antenna.

Referring to FIG. 14, the specific method flow of cell deletion in this embodiment is as follows:

Step 1401: the base station determines that a cell deletion operation is required.

The base station may determine the resource of a cell for which an antenna needs to be removed according to the conditions of physical resources and logical resources, that is, all or part of the cells to be deleted. Alternatively, the base station determines that the operation of deleting the cell needs to be performed according to the cell deletion request message sent by the RNC, wherein the cell deletion operation can be initiated by the RNC or the OMC, and the base station can delete the cell resources on multiple antennas according to a received cell deletion request message, Alternatively, cell resources on multiple antennas under the same cell are respectively deleted according to multiple cell deletion request messages received.

Alternatively, when one antenna corresponds to multiple cells, the base station may delete some or all of the cells on one antenna.

Step 1402: the base station deletes the common channel and dedicated channel on at least one antenna among the multiple antennas corresponding to the same cell.

Step 1403: the base station sets the state of the cell and the common channel on the at least one antenna as non-existent.

Step 1404: the base station removes the wireless link on the at least one antenna.

Through the description of the above embodiments, the method of cell establishment and cell deletion with multiple antennas is understood, then the change of cell network with multiple antennas can be further implemented, and cells can be re-planned, including cell splitting and cell merging.

Cell splitting is to split a cell into multiple cells, which can be to delete a cell corresponding to multiple antennas, and then establish at least two cells for the multiple antennas; or, delete the cell resources of some antennas among the multiple antennas corresponding to the same cell , and then build a new cell for this part of the antenna. Cell splitting can adapt to the development needs of communication services and communication users, and is also applicable to changes in various actual environments. For example, if a high-rise building is built between two antennas corresponding to the same cell, the coverage areas of the two antennas will be isolated and wireless signals will be blocked. transmission, and may lead to a rapid increase in communication services and communication users. The cell splitting process can be controlled by the OMC. This embodiment provides a method for dynamically splitting a cell to flexibly adapt to the actual surrounding environment and wireless transmission requirements, as shown in FIG. 15 , the main method flow is as follows:

Step 1501: Count the total physical resource occupancy of multiple antennas corresponding to the same cell. Statistical operations can be performed on all cells at the same time, and this embodiment uses one cell as an example to describe in detail.

Step 1502: Determine that the occupied physical resources within a preset time period are not less than a preset threshold, and determine that cell division needs to be performed when the preset time is reached.

Step 1503: Split the same cell into at least two cells, and configure the multiple antennas to the at least two cells respectively.

Wherein, the physical resources include transmit power and code channel resources, etc. Cell splitting can be performed according to any physical resource, which will be described in detail below.

Referring to Figure 16A, the specific method flow for cell splitting according to transmit power is as follows:

Step 1601: Count the total transmit power of multiple antennas corresponding to the same cell.

Step 1602: When the total transmit power reaches the power split threshold, start timing.

Step 1603: Determine whether the counted time reaches the preset time, and determine whether the total transmit power continues to reach or exceed the power split threshold.

Step 1604: When the counted time reaches the preset time and the total transmit power continuously reaches or exceeds the power splitting threshold, initiate a cell splitting operation. Continue to step 1606. For example, the maximum transmit power is m watts, the preset time is n days, and the power splitting threshold is 10 watts. When the total transmit power is between 10 and m and lasts for n days, it is determined that cell splitting is required.

Step 1605: When the total transmit power falls below the power split threshold before the counted time reaches the preset time, reset the counted time to zero. Step 1601 can be continued.

Step 1606: Split one cell into at least two cells. There are many specific ways, such as deleting the cell resources on the at least two antennas, and configuring different cell resources for the at least two antennas respectively; or, deleting the cell on one of the at least two antennas resources, and configure cell resources different from the same cell for the one antenna. Step 1601 can be continued.

Referring to Figure 16B, the specific method flow for cell splitting according to transmit power is as follows:

Step 1611: Count the total code channel resource occupancy of multiple antennas corresponding to the same cell, specifically by making statistics on the traffic volume.

Step 1612: When the occupied code channel resources reach the code channel split threshold, start timing.

Step 1613: Determine whether the counted time reaches the preset time, and determine whether the total transmit power continues to reach or exceed the channel splitting threshold.

Step 1614: When the counted time reaches the preset time and the occupied code channel resources continue to reach or exceed the code channel splitting threshold, initiate a cell splitting operation. Continue with step 1616.

Step 1615: When the counted time does not reach the preset time and the occupied code channel resource falls below the code channel splitting threshold, reset the counted time to zero. Step 1611 can be continued.

Step 1616: Split one cell into at least two cells. There are many specific ways, such as deleting the cell resources on the at least two antennas, and configuring different cell resources for the at least two antennas respectively; or, deleting the cell on one of the at least two antennas resources, and configure cell resources different from the same cell for the one antenna. Step 1611 can be continued.

The above two embodiments are descriptions of cell splitting methods based on transmit power and code channel resources respectively. The above two embodiments can be further combined. When the transmit power and code channel resources are continuously not lower than When the corresponding thresholds are determined, it is determined that cell splitting is required.

The process corresponding to the cell splitting process is cell merging, which is to merge multiple cells into one cell. That is, delete the cell resources on the multiple antennas corresponding to multiple cells, and then configure the same cell resources for the multiple antennas; or delete the cell resources on the multiple antennas of a cell, and then configure the multiple antennas with other The same cell resources of a cell. Cell merging is applicable to a variety of actual environment changes. For example, if a high-rise building between two adjacent cells is demolished, the transmission path of the wireless signal that was originally blocked will become unimpeded, which may lead to a rapid decrease in communication services and communication users. . The cell merging process can be controlled by the OMC. This embodiment provides a method for dynamically merging cells to flexibly adapt to the actual surrounding environment, as shown in FIG. 17 , the method flow is as follows:

Step 1701: Make statistics on the occupation of physical resources in each cell.

Step 1702: Determine that there are at least two cells, and for each of the at least two cells, the occupied physical resources within a preset time period are not greater than a preset threshold (referred to as a combination threshold in this embodiment), and It is determined that cell merging needs to be performed when the at least two cells reach a preset time.

Step 1703: Merge the at least two cells into one cell, and configure multiple antennas corresponding to the original at least two cells as the one cell. There are many specific implementation methods, such as deleting the at least two cells, and then configuring the same cell resources for multiple antennas under the at least two cells; or deleting the antenna corresponding to one of the at least two cells Then configure the antenna corresponding to this cell with the same cell resource as that of another cell.

Wherein, the physical resources include transmission power and code channel resources, etc., and cell division can be performed according to any one or several physical resources.

The structure of the distributed base station and the method of cell planning are known through the description of the above embodiments, and the structure of the internal units of the distributed base station will be described below.

Referring to FIG. 18 , the RRU in this embodiment includes an external interface unit 1801 , a radio frequency unit 1802 and a configuration unit 1803 .

The external interface unit 1801 is used to connect to other units in the distributed base station (such as BBU, BIU or OMC, etc.), to receive and send messages in the form of digital signals.

The radio frequency unit 1802 is used for connecting multiple antennas, and receiving and sending radio frequency signals.

The configuration unit 1803 is configured to configure the connected multiple antennas as at least one cell according to the received cell establishment request message, and configure the multiple antennas on at least one of the multiple antennas according to the received cell deletion request message Cell resources are deleted.

The RRU also includes an intermediate frequency unit 1804 and a combining unit 1805, as shown in FIG. 19 .

The intermediate frequency unit 1804 is used for converting the radio frequency signal received by the radio frequency unit into a digital signal.

The merging unit 1805 is configured to superimpose digital signal vectors of multiple antennas corresponding to the same subcarrier and the same cell in the digital signal.

Referring to FIG. 20 , the device for planning a cell in this embodiment (referred to as a cell planning unit in this embodiment) includes a statistics unit 2001 , a control unit 2002 and a configuration unit 2003 .

The statistic unit 2001 is used to make statistic statistics of physical resource occupancy of multiple antennas corresponding to the same cell.

The control unit 2002 is configured to determine that the occupied physical resources are not less than a preset split threshold within a certain time range, and determine that cell splitting is required; and, determine that there are at least two cells, and for each cell in the at least two cells , the occupied physical resource within a preset time is continuously not greater than a preset combination threshold, and it is determined that cell combination needs to be performed when both the at least two cells reach the preset time.

The configuration unit 2003 is configured to generate and send a cell deletion request message and a cell establishment request message when the counted time reaches a preset time range and the occupied physical resources continue to reach or exceed a split threshold, and split the same cell into two cells, the at least two antennas respectively correspond to the two cells; and, when the counted time reaches the preset time range and the occupied physical resources do not exceed the combination threshold continuously, generate a cell deletion request message and a cell A request message is established and sent, the at least two cells are combined into one cell, and the multiple antennas corresponding to the original at least two cells are configured as the one cell.

The cell planning unit may belong to RNC, OMC or evolved base station. The cell planning unit can exist as an independent unit in the evolved base station, or exist as a whole in an existing unit in the evolved base station, such as belonging to the BBU, or exist in multiple units in the evolved base station, for example, the statistical unit 2001 can be located in In the RRU, the control unit 2002 may be located in the RRU or the BBU, and the configuration unit 2003 may be located in the BBU.

Referring to FIG. 21 , the RNC in this embodiment includes an interface unit 2101 and a cell planning unit 2102 .

The interface unit 2101 is used for interacting with the connected base station, receiving and sending messages.

The cell planning unit 2102 is configured to make statistics on the occupancy of physical resources through the interface unit 2101, determine that the occupied physical resources are not less than a preset split threshold within a certain time range, and determine that cell splitting is required; and, determine that there are at least Two cells, for each of the at least two cells, the occupied physical resources within the preset time are not greater than the preset combination threshold, and when the at least two cells reach the preset time It is determined that cell merging is required.

The interface unit 2101 sends a message about splitting the same cell into two cells to the base station when it is determined that cell splitting is required, and sends a message about merging multiple cells into two cells when it is determined that cell merging is required. news from a community.

When the OMC includes a cell planning unit, the structure is similar to that of the RNC, and will not be repeated here.

The embodiment of the present invention provides a method for cell planning, including cell deletion, cell splitting, and cell merging, which realizes flexible networking of cells, enables dynamic cell planning and networking according to the actual environment, saves human resources and improves communication transmission quality. Moreover, the embodiment of the present invention provides a device for planning a cell, a distributed base station, etc., and realizes flexible cell networking.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (11)

1. a cell splitting method is characterized in that, may further comprise the steps:

The physical resource of adding up on the many antennas of corresponding same residential quarter takies situation, has the RRU of corresponding a plurality of residential quarters among the RRU of described many antenna correspondences;

Determine that the physical resource that has taken continues to be not less than preset threshold value in the default time, and when reaching default time, determine to carry out cell splitting;

Described same cell splitting is at least two residential quarters, and described many antennas are configured to described at least two residential quarters respectively; Described same cell splitting is comprised for the step of two residential quarters at least: delete the local resource on the many antennas of the same residential quarter of described correspondence, and be respectively the different local resource of described many antennas configuration; Perhaps, delete the local resource on a part of antenna in the many antennas of the same residential quarter of described correspondence, and be different from the local resource of described same residential quarter for described a part of antenna configuration.

2. cell splitting method as claimed in claim 1, it is characterized in that, when the described physical resource that has taken reaches described threshold value, pick up counting, and the physical resource that has taken when the time of timing does not reach described default time then carries out the timing zero clearing less than described threshold value.

3. cell splitting method as claimed in claim 1 is characterized in that, described local resource comprises local district identification at least.

4. cell splitting method as claimed in claim 1 is characterized in that, in the allocating cell resource process, in the time need disposing identical local resource for many antennas, setting up request message according to a residential quarter is the many identical local resources of antennas configuration.

5. cell splitting method as claimed in claim 1 is characterized in that, many antennas of the same residential quarter of described correspondence belong to same radio frequency remote unit RRU or belong to different RRU.

6. cell splitting method as claimed in claim 1 is characterized in that, an antenna in the many antennas of the same residential quarter of described correspondence is common antenna or is to comprise the smart antenna of a plurality of antenna elements or be poliarizing antenna.

7. cell splitting method as claimed in claim 1 is characterized in that, described physical resource comprises transmitting power and/or code channel resource.

8. cell splitting method as claimed in claim 1 is characterized in that, further will carry out vector superposed according to identical time location from the multi-path digital signal of corresponding same sub-carrier in the digital signal of many antennas of the same residential quarter of described correspondence.

9. a residential quarter merging method is characterized in that, may further comprise the steps:

The physical resource of adding up in each residential quarter takies situation;

At least two residential quarters of definite existence, for each residential quarter at least two residential quarters, the physical resource that has taken in the default time continues to be not more than preset threshold value, and determines to carry out the residential quarter when all reaching default time at least in described two residential quarters and merge;

A residential quarter is merged in described at least two residential quarters, many antennas of former described at least two residential quarters of correspondence are configured to a described residential quarter, have the RRU of corresponding a plurality of residential quarters among the RRU of described many antenna correspondences; The step that a residential quarter is merged in described at least two residential quarters comprises: deleting the local resource on the antenna of described at least two residential quarter correspondences, is the many identical local resources of antennas configuration under described at least two residential quarters again; Perhaps deleting the local resource on the antenna of a residential quarter correspondence in described at least two residential quarters, is the antenna configuration local resource identical with another residential quarter of this residential quarter correspondence again.

10. residential quarter as claimed in claim 9 merging method is characterized in that described physical resource comprises transmitting power and/or code channel resource.

11. a device that is used for the planning cell networking is characterized in that, comprising:

Statistic unit takies situation for the physical resource on the many antennas of the corresponding same residential quarter of statistics, has the RRU of corresponding a plurality of residential quarters among the RRU of described many antenna correspondences;

Control unit is used for determining that the physical resource that has taken continues to be not less than preset threshold value in the default time, and determines to carry out cell splitting when reaching default time;

Dispensing unit is used for described same cell splitting is at least two residential quarters, and described many antennas is configured to described at least two residential quarters respectively; Described same cell splitting specifically is used for at least two residential quarters: delete the local resource on the many antennas of the same residential quarter of described correspondence, and be respectively the different local resource of described many antennas configuration; Perhaps, delete the local resource on a part of antenna in the many antennas of the same residential quarter of described correspondence, and be different from the local resource of described same residential quarter for described a part of antenna configuration.

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