WO2009049473A1 - Procédé et système de mise en œuvre d'une mise en réseau de cellules - Google Patents

Procédé et système de mise en œuvre d'une mise en réseau de cellules Download PDF

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Publication number
WO2009049473A1
WO2009049473A1 PCT/CN2008/001622 CN2008001622W WO2009049473A1 WO 2009049473 A1 WO2009049473 A1 WO 2009049473A1 CN 2008001622 W CN2008001622 W CN 2008001622W WO 2009049473 A1 WO2009049473 A1 WO 2009049473A1
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WIPO (PCT)
Prior art keywords
cell
base station
antennas
antenna
cells
Prior art date
Application number
PCT/CN2008/001622
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English (en)
French (fr)
Inventor
Suling Zou
Ju Fan
Jun Li
Hongbo Wang
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Datang Mobile Communications Equipment Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Datang Mobile Communications Equipment Co., Ltd filed Critical Datang Mobile Communications Equipment Co., Ltd
Publication of WO2009049473A1 publication Critical patent/WO2009049473A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for implementing cell networking. Background technique
  • a common antenna or a smart antenna including a plurality of antenna units corresponds to one cell.
  • existing cell resources can no longer meet the demand.
  • one way is to increase the number of antennas to increase cell resources, and the other way is to multi-channel
  • the signals are combined into one signal.
  • an analog signal is transmitted between the baseband and the transceiver.
  • the analog signal can be directly superimposed on the transmission line and sent to the baseband side for processing.
  • the analog signal will continue to decay.
  • the analog signal is usually amplified by a relay device (such as a dry station) to achieve no blind zone coverage.
  • the amplified signal is amplified while the noise signal is amplified. Quality has a serious impact, and there is greater power consumption, and relay equipment has the disadvantage of being difficult to maintain.
  • a radio remote technology is introduced in the prior art to remotely place a radio unit in a base station and place it near the antenna.
  • a baseband unit BBU
  • RRUs remote radio units
  • a BBU supports up to 6 subcarriers (with 8 antenna configurations per carrier), and a BBU supports up to 48 signals.
  • the embodiments of the present invention provide a method and a system for implementing cell networking, which are used to implement flexible planning of a cell and various forms of cell networking, thereby improving spectrum utilization or saving network resources.
  • the embodiment of the present invention provides a method for deleting a cell of a distributed base station, including the following steps: deleting a common channel and a dedicated channel on at least one of the plurality of antennas corresponding to the same cell; The state of the cell and the common channel is set to absent; the wireless link on the at least one antenna is removed.
  • the embodiment of the present invention provides a cell splitting method, which includes the following steps: Counting physical resource occupations on multiple antennas corresponding to the same cell; determining that the occupied physical resources in the preset time period is not less than a preset width a value, and determining that cell splitting needs to be performed when a preset time is reached; splitting the same cell into at least two cells, and configuring the plurality of antennas to the at least two cells respectively.
  • the embodiment of the present invention provides a cell merging method, including the following steps: statistic of physical resource occupancy in each cell; determining that at least two cells exist, for each of at least two cells, within a preset time The occupied physical resources are not longer than the preset threshold, and it is determined that the cell merging needs to be performed when the at least two cells reach the preset time; and the at least two cells are combined into one cell, and the corresponding original A plurality of antennas of the at least two cells are configured as the one cell.
  • An embodiment of the present invention provides an apparatus for planning a cell network, including: a statistical unit, configured to count physical resource occupation on multiple antennas corresponding to the same cell; a control unit, used for splitting a threshold, and Determining that the same cell needs to perform cell splitting when a preset time is reached; and determining that there are at least two cells, and multiple antennas of each of the at least two cells reach a preset time in two less cells Determining that the at least two cells need to perform cell merging; the configuration unit is configured to split the same cell that needs to perform cell splitting into at least two cells, and configure multiple antennas of the same cell to at least two after splitting And combining at least two cells that are determined to perform cell merging into one cell, and configuring a plurality of antennas of at least two cells that need to perform cell merging into the combined one of the cells.
  • An embodiment of the present invention provides an RRU, including: an external interface unit, configured to receive and send a message; a radio unit, configured to connect multiple antennas, and receive radio frequency signals from multiple antennas and transmit radio frequency signals to multiple antennas. a configuration unit, configured to configure, according to the received cell setup request message, the connected multiple antennas as at least one cell, and according to the received cell deletion request message, to connect at least one of the multiple antennas The cell resource is deleted.
  • the embodiment of the present invention provides a distributed base station, including: an antenna, configured to receive and transmit an analog radio frequency signal, and a radio remote unit RRU connected to the plurality of antennas, configured to connect according to the received cell establishment request message.
  • the plurality of antennas are configured with at least one cell, and the cell resources on at least one of the plurality of antennas in the same cell are deleted according to the received cell deletion request message; and the baseband unit BBU is configured to process the digital signal from the RRU.
  • the embodiment of the present invention provides a distributed base station, including: an antenna, configured to receive and transmit an analog radio frequency signal; and multiple RRUs, respectively configured to configure a cell resource for an antenna connected locally according to the received cell setup request message. And deleting, according to the received cell deletion request message, a cell resource on an antenna that is locally connected, where multiple antennas of the multiple RRUs are configured with the same cell resource; and the BBU is used for the RRU. Digital signals are processed.
  • Embodiments of the present invention provide a distributed base station, including: an antenna, configured for receiving and transmitting modes a radio frequency signal; a radio remote unit RRU, connected to a plurality of antennas, configured to convert an analog radio frequency signal from a plurality of antennas into a digital signal, where the plurality of antennas correspond to the same cell, or the plurality of antennas Each part of the antenna in the root antenna corresponds to a different cell; the baseband unit BBU is used to process the digital signal from the RRU.
  • the embodiment of the present invention provides a distributed base station, including: an antenna, configured to receive and transmit an analog radio frequency signal; and multiple RRUs, each RRU includes an antenna, configured to convert an analog radio frequency signal from the antenna into a digital signal. Transmitting; wherein, the multiple antennas of the multiple RRUs correspond to the same cell BBU, and are used for processing digital signals from the RRU.
  • the embodiments of the present invention provide a cell planning method, including cell deletion, cell splitting, and cell merging, which implements flexible networking of a cell, and can perform dynamic cell planning and networking according to an actual environment, thereby saving human resources or improving communication. Transmission quality. Moreover, the embodiments of the present invention provide a device for planning a cell, a distributed base station, and the like, and implement a flexible cell networking. DRAWINGS
  • FIGS. 1A-8 are structural diagrams of a distributed base station according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of a main method for establishing a cell according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for establishing a cell when an RNC initiates cell establishment according to an embodiment of the present invention
  • FIG. 11 is a flowchart of a method for establishing a cell when an OMC initiates cell establishment according to an embodiment of the present invention
  • FIG. 12 is a flowchart of an evolved base station according to an embodiment of the present invention
  • FIG. 13 is a flowchart of a main method for deleting a cell according to an embodiment of the present invention.
  • FIG. 14 is a flowchart of a specific method for deleting a cell according to an embodiment of the present invention.
  • 15 is a flowchart of a main method for cell splitting according to an embodiment of the present invention.
  • 16A is a flow chart of a specific method for performing cell splitting according to transmit power according to an embodiment of the present invention
  • 16B is a flowchart of a specific method for performing cell splitting according to code channel resources according to an embodiment of the present invention
  • 17 is a flowchart of a method for cell merging according to an embodiment of the present invention
  • FIG. 18 is a basic structural diagram of an RRU according to an embodiment of the present invention.
  • FIG. 19 is a detailed structural diagram of an RRU according to an embodiment of the present invention.
  • FIG. 20 is a structural diagram of a cell planning unit according to an embodiment of the present invention.
  • FIG. 21 is a structural diagram of an RNC in an embodiment of the present invention. detailed description
  • multiple antennas are corresponding to one cell according to an actual environment, so as to save cell resources, or multiple antennas corresponding to multiple cells, to meet the needs of communication services or communication users.
  • the cell resources in the embodiment of the present invention include a local cell identifier, a training sequence, and a physical resource, and the physical resources include a transmission power and a code channel resource.
  • the distributed base station in the embodiment of the present invention includes a Universal Mobile Telecommunications System (UMTS) under the Base B and Long Time Evolution (LTE) systems. Evolved Node B).
  • the antenna in the embodiment of the present invention includes a general antenna, a smart antenna having a plurality of antenna elements, and a non-smart antenna (e.g., a polarized antenna).
  • one antenna is determined as one channel
  • the RRU connecting multiple antennas is a multi-channel RRU
  • the RRU connecting a single antenna is a single-channel RRU.
  • 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 transmitting analog radio signals.
  • a distributed base station can include multiple RRUs, which can be in parallel, series, or hybrid.
  • the hybrid relationship refers to: a plurality of RRUs constituting a series relationship form a parallel relationship with one or more other RRUs, and all of the RRUs in the series relationship and the parallel relationship form a hybrid relationship.
  • the device that can initiate cell establishment and cell deletion in the embodiment of the present invention includes a radio network controller (Rad o Network: Controller, RNC), an operation and maintenance center (OMC), and an evolved base station.
  • RNC radio network controller
  • OMC operation and maintenance center
  • the BBU in the distributed base station is used for the processing of baseband digital signals.
  • the BBU is also used to forward the cell setup request message sent by the RNC or the OMC.
  • cell deletion request message When the cell site is planned by the eNodeB, the distributed base station includes a cell planning unit 101.
  • the cell planning unit 101 is configured to plan a cell, determine cell establishment and deletion, and generate and send a cell.
  • the request message and the cell deletion request message may be directly sent to the RRU or forwarded to the RRU via the BBU.
  • the cell planning unit 101 can also be assigned to the BBU, which is equivalent to the planning of the cell networking by the BBU.
  • the BBUs can be multiple and form a BBU resource pool to jointly provide services for the connected RRUs.
  • the RRU is configured to convert the analog RF signal received by the connected plurality of antennas into a digital signal, and then transmit the received digital signal into an analog RF signal and transmit the signal through 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 setup request message, and delete the cell resources on at least one of the plurality of 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 a partial antenna on one multi-channel RRU may correspond to one cell on other multi-channel RRU or antenna on a single-channel RRU.
  • the multi-channel RRU can be connected to multiple single-channel RRUs and multiple RRUs in the prior art to form a series, parallel or hybrid relationship, and the multi-channel RRU, the single-channel RRU and the RRU in the prior art can correspond to one cell. .
  • the RRU is configured to convert the analog RF signal received by the connected antenna into a digital signal, and convert the received digital signal into an analog RF signal and transmit it through an antenna.
  • the RRU is further configured to configure a cell for the connected antenna according to the received cell setup request message, and delete the cell resource on the one antenna according to the received cell deletion request message.
  • Multiple single-channel RRUs can correspond to one cell.
  • the connection example between the BBU and the single-channel RRU is shown in Figure 2.
  • the single-channel RRU can be connected to a plurality of multi-channel RRUs and a plurality of prior art RRUs to form a series, parallel or hybrid relationship.
  • FIG. 3 An example of an RRU in which a BBU is connected to multiple concatenations is shown in FIG. 3.
  • the distributed base station may further include one or more BaseBand Interface Units (BIUs). As shown in FIG. 2 and FIG. 4-8, the BIU is used to forward digital signals between the BBU and the RRU.
  • the RRU can be connected to any BBU to make the networking form more flexible.
  • one BBU is connected to multiple antennas exceeding its design capability, and the BBU must process signals from more antennas within its design capability.
  • This embodiment provides a method for combining digital signals from multiple antennas. To enable the BBU to process multiple digital signals that meet the design capabilities.
  • the method of combining digital signals is: performing vector superposition on multiple digital signals corresponding to the same subcarrier and the same cell according to the time synchronization principle. Superimposing multiple digital signals corresponding to the same subcarrier and the same cell in the I component direction according to the same time position, and multi-channel digital signals corresponding to the same subcarrier and the same cell in the Q component direction, according to the same time position Overlay operation.
  • the digital signal is regarded as a continuous combination of "1" and "0".
  • the data of one digital signal at one time point is 1100, and each 'T' or "0" is a data.
  • the superposition of the multi-channel digital signals is the bitwise addition of the data of the multi-channel digital signals, and the binary addition operation is performed.
  • This embodiment is further illustrated by a mathematical model.
  • the digital signal at a certain point in time is expressed as an+jbn
  • a represents data in the direction of the I component
  • j represents the Q component
  • b represents data in the direction of the Q component
  • n takes a different value to identify each digit. signal.
  • the process of merging digital signals can be expressed as:
  • the main method for establishing a cell in this embodiment is as follows:
  • Step 901 Assign at least two antennas with the same local cell identifier.
  • Step 902 Configure a maximum output power for the at least two antennas.
  • Step 903 Configure a training sequence, a channel resource, and the like for the at least two antennas.
  • the foregoing method flow implements multiple antennas corresponding to one cell, and can adopt the diversity or multiplexing technology of multiple-input multiple-output (MIMO) system to improve the transmission quality in the cell or improve the carrying capacity of the cell.
  • MIMO multiple-input multiple-output
  • the method of cell establishment is described in detail below.
  • the first case is that the RNC initiates a cell establishment process. Referring to FIG. 10, the specific method is as follows: Step 1001: The RNC initiates a resource audit process, sends an audit request message to the Node B, and notifies the Node B to perform resource audit. Or, the Node B periodically reports the audit result to the RNC.
  • Step 1002 The RNC determines that a cell establishment is required according to the audit response message returned by the Node B.
  • Step 1003 The RNC sends a cell establishment request message to the Node B.
  • the RNC may instruct the Node B to allocate a cell resource to a specific antenna by adding a cell in the cell setup request message, such as (Tl, T3, T5), indicating that the antennas identified as T1, ⁇ 3, and ⁇ 5 are configured identically.
  • the cell resources that is, the antennas T1, ⁇ 3, and ⁇ 5 correspond to the same cell.
  • the cells of the RRU may be further added, such as (Rl (Tl, ⁇ 3, ⁇ 5), R3 (Tl, ⁇ 2, ⁇ 4)), and the antennas and identifiers identified as T1, ⁇ 3, and ⁇ 5 on the RRUs identified as R1 are
  • the antennas identified as T1, ⁇ 2, and ⁇ 4 on the RRU's RRU are configured with the same cell resources.
  • the RNC instructs the Node B to allocate the same cell resource (especially the same local cell identifier) to the multiple antennas by sending the cell setup request message multiple times.
  • the RNC instructs the Node B to allocate different cell resources (especially configuring different local cell identifiers) to multiple antennas on one RRU by sending a cell setup request message multiple times.
  • the RNC may further instruct the Node B to configure multiple cells for one antenna, such as configuring a single frequency point cell, by adding a cell in the cell setup request message.
  • Step 1004 The Node B allocates the same local cell identifier to the antennas that need to configure the same cell resource according to the received cell setup request message, and saves the allocation result.
  • the local cell identifier is a flag for distinguishing cells, and the two regions belong to different cells as long as the local cell identifiers of the two regions are different.
  • the Node B can configure the corresponding antenna according to the antenna identifier carried in the cell setup request message. Or, when the cell setup request message does not carry the antenna identifier, the Node B determines, according to the audit result, the antenna that needs to be established by the cell, and configures the corresponding antenna according to the cell setup request message.
  • Step 1005 The Node B configures the multiple antennas according to the received cell setup request message. Output Power.
  • Step 1006 The Node B configures channel resources for the multiple antennas according to the received cell setup request message, and establishes a Common Pilot Channel (CPICH), a Primary Synchronization Channel (PSCH), and a Secondary Synchronization Channel ( Secondary Synchronization Channel (SSCH), Primary Common Control Physical Channel (PCCPCH), Broadcast CHannel (BCH).
  • CPICH Common Pilot Channel
  • PSCH Primary Synchronization Channel
  • SSCH Secondary Synchronization Channel
  • PCCPCH Primary Common Control Physical Channel
  • BCH Broadcast CHannel
  • the second case is that the OMC initiates a cell establishment process, as shown in Figure 11, under the specific method flow:
  • Step 1101 The OMC triggers the RNC to start cell establishment by using a control message.
  • Step 1102 After receiving the control message, the RNC sends a cell establishment request message to the Node B.
  • Step 1104 The Node B configures a maximum output power for the multiple antennas according to the received cell setup request message.
  • Step 1105 The Node B configures channel resources for the multiple antennas according to the received cell setup request message.
  • the OMC can also trigger the cell establishment of the evolved base station in the LTE system, and the evolved base station performs cell configuration on the corresponding multiple antennas according to the control message sent by the OMC to establish a cell.
  • the third case is to initiate a cell establishment process by the evolved base station in the LTE system.
  • the specific method flow is as follows:
  • Step 1201 The evolved base station initiates cell establishment according to the status of the physical resource and the logical resource.
  • Step 1202 The evolved base station allocates the same local cell identifier to multiple antennas that need to be configured with the same cell resource, and saves the allocation result.
  • Step 1203 The evolved base station configures a maximum output power for the multiple antennas.
  • Step 1204 The evolved base station configures channel resources for the multiple antennas.
  • Step 1301 Delete a common channel and a dedicated channel on at least one of the plurality of antennas corresponding to the same cell.
  • Step 1302 Set the state of the cell and the common channel on the at least one antenna to be absent.
  • Step 1303 Remove the wireless link on the at least one antenna.
  • Step 1401 The base station determines that an operation of deleting the cell needs to be performed.
  • the base station can determine the cell resource that needs to be removed according to the physical resource and the logical resource, that is, delete all or part of the cell on the antenna. Or, the base station determines, according to the cell deletion request message sent by the RNC, the operation of deleting the cell, where the cell deletion operation may be initiated by the RNC or the OMC, and the base station may delete the cell resource on the multiple antennas according to the received cell deletion request message. Or deleting cell resources on multiple antennas in the same cell according to the received multiple cell deletion request messages.
  • the base station may delete part or all of the cells on one antenna.
  • Step 1402 The base station deletes a common channel and a dedicated channel on at least one of the plurality of 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 to be absent.
  • Step 1404 The base station removes the wireless link on the at least one antenna.
  • the method for cell establishment and cell deletion of multiple antennas is known, and then the cell network change with respect to multiple antennas can be further realized, and the cells are re-planned, including cell splitting and cell merging.
  • the cell splitting is to split a cell into multiple cells, and may delete one cell corresponding to multiple antennas, and then establish at least two cells for multiple antennas; or delete cell resources of some antennas of multiple antennas corresponding to the same cell. And then establish 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 new high-rise building is built between two antennas corresponding to the same cell, the coverage areas of the two antennas are isolated. Blocking the transmission of wireless signals and may result in 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 performing cell splitting, which is flexible to adapt to the actual surrounding environment and wireless transmission requirements. Referring to FIG. 15, the main method flow is as follows:
  • Step 1501 Count the total physical resource occupation on multiple antennas corresponding to the same cell.
  • the statistics operation can be performed on all the cells at the same time. This embodiment uses a cell as an example for detailed description.
  • Step 1502 Determine that the physical resources that have been occupied in the preset time are not less than a preset threshold, and determine that cell splitting 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.
  • the physical resources include the transmit power and the code channel resources, and the cell splitting may be performed according to any physical resource, which is described in detail below.
  • 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, timing is started.
  • Step 1603 Determine whether the time of the timing reaches a preset time, and determine whether the total transmit power continues to reach or exceed the power splitting threshold.
  • Step 1604 When the time of the timer reaches the preset time and the total transmit power continues to reach or exceed the power split threshold, the cell splitting operation is initiated. Continue with step 1606.
  • the maximum transmit power is m watts
  • the preset time is n days
  • the power splitting threshold is 10 watts.
  • the total transmit power is between 10 and m for n days, it is determined that cell splitting is required.
  • Step 1605 When the time of the timer does not reach the preset time and the total transmit power falls below the power split threshold, the time of the timing is cleared. Step 1601 can continue.
  • Step 1606 Split a cell into at least two cells.
  • the specific manner is as follows: deleting the cell resources on the at least two antennas, and respectively configuring different cell resources for the at least two antennas; or deleting the cells on one of the at least two antennas Resource, and configuring a cell resource different from the same cell for the one antenna.
  • Step 1601 can continue.
  • the specific method for cell splitting according to the transmit power is as follows: Step 1611: Count the total code channel resource occupation on multiple antennas corresponding to the same cell, and the specific manner is to perform statistics on the traffic.
  • Step 1612 When the occupied code channel resource reaches the code channel splitting threshold, timing is started.
  • Step 1613 Determine whether the time of the timing reaches a preset time, and determine whether the total transmit power continues to reach or exceed the code channel splitting threshold.
  • Step 1614 When the time of the timer reaches the preset time and the occupied code channel resources continue to reach or exceed the code channel splitting threshold, the cell splitting operation is initiated. Continue to step 1616.
  • Step 1615 When the time of the timer has not reached the preset time, the occupied code channel resource falls below the code splitting threshold, and the time of the timing is cleared. Proceed to step 1611.
  • Step 1616 Split a cell into at least two cells.
  • the specific manner is as follows: deleting the cell resources on the at least two antennas, and respectively configuring different cell resources for the at least two antennas; or deleting the cells on one of the at least two antennas Resource, and configuring a cell resource different from the same cell for the one antenna. Proceed to step 1611.
  • the foregoing two embodiments are described in the method of cell splitting according to the transmit power and the code channel resources respectively.
  • the foregoing two embodiments may be further combined, and the transmit power and the code channel resources are not lower than the preset time. When the corresponding threshold is used, it is determined that cell splitting is required.
  • the process corresponding to the cell splitting process is cell merging, and cell merging combines multiple cells into one cell. That is, the cell resources on the multiple antennas corresponding to the multiple cells are deleted, and the same cell resource is configured for the multiple antennas; or the cell resources on the multiple antennas of one cell are deleted, and the multiple antennas are configured and The same cell resource of a cell.
  • the cell combination is applicable to a variety of actual environment changes. For example, if a high-rise building between two adjacent cells is removed, the transmission path of the originally blocked wireless signal becomes smooth, and the communication service and the communication user may be rapidly reduced. .
  • the cell consolidation process can be controlled by the OMC. This embodiment provides a method for dynamically performing cell merging, so as to flexibly adapt to the actual surrounding environment. Referring to FIG. 17, the method flow is as follows:
  • Step 1701 Count the occupation of physical resources in each cell.
  • Step 1702 determining that there are at least two cells, for each of the at least two cells, And wide value), and it is determined that cell merging needs to be performed when the at least two cells reach a preset time.
  • Step 1703 Combine the at least two cells into one cell, and configure multiple antennas corresponding to the at least two cells to be the one cell.
  • the upper cell resource is configured with the same cell resource as the other cell for the antenna corresponding to the one cell.
  • the physical resources include the transmit power and the code channel resources, and the cell splitting may be performed according to any one or several physical resources.
  • the structure of the distributed base station and the method of cell planning are understood by the description of the above embodiments, and the structure of the internal unit of the distributed base station is described.
  • 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 other units in the distributed base station (such as BBU, BIU or
  • OMC receives and transmits messages in the form of digital signals.
  • the radio unit 1802 is used to connect a plurality of antennas and receive and transmit 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 setup request message, and perform at least one of the plurality of antennas according to the received cell deletion request message.
  • the cell resource is deleted.
  • the RRU also includes an intermediate frequency unit 1804 and a combining unit 1805, as shown in FIG.
  • the intermediate frequency unit 1804 is configured to convert the radio frequency signal received by the radio frequency unit into a digital signal.
  • the merging unit 1805 is configured to superimpose the digital signal vectors of the plurality of antennas corresponding to the same subcarrier and the same cell in the digital signal.
  • the device for planning a cell in this embodiment includes a statistical unit 2001, a control unit 2002, and a configuration unit 2003.
  • the statistic unit 2001 is configured to count the physical resource occupation of multiple antennas corresponding to the same cell.
  • the control unit 2002 is configured to determine that the occupied physical resource is not less than a preset splitting threshold in a certain time range, and determine that cell splitting needs to be performed; and, determining that there are at least two cells, for each of the at least two cells.
  • the physical resources that have been occupied in the preset time are not greater than the preset merged threshold, and it is determined that the cell merge needs to be performed when the at least two cells reach the preset time.
  • the configuration unit 2003 is configured to generate a cell deletion request message and a cell setup request message, and send the same cell to the preset time range, and the occupied physical resource continues to reach or exceed the splitting threshold, and splits the same cell into The two cells, the at least two antennas respectively correspond to the two cells; and, when the time of the timer reaches a preset time range and the occupied physical resources continue to not exceed the merged threshold, generating a cell deletion request message and The cell setup request message is sent and combined, and the at least two cells are combined into one cell, and multiple antennas corresponding to the original at least two cells are configured as the one cell.
  • the cell planning unit may belong to an RNC, an OMC, or an evolved base station.
  • the cell planning unit may exist in an independent unit in the evolved base station, or may exist in the existing unit in the evolved base station, such as the BBU, or exist in multiple units in the evolved base station, for example, the statistical unit 2001 may be located.
  • the control unit 2002 can be located in the RRU or BBU, and the configuration unit 2003 can be located in the BBU.
  • the RNC in this embodiment includes an interface unit 2101 and a cell planning unit 2102.
  • the interface unit 2101 is configured to interact with the connected base station to receive and send messages.
  • the cell planning unit 2102 is configured to perform statistics on the occupation of physical resources by the interface unit 2101, determine that the occupied physical resources are not less than a preset splitting threshold in a certain time range, and determine that cell splitting needs to be performed; At least two cells, for at least two cell values, and determining that cell merging is required when the at least two cells reach a preset time.
  • the interface unit 2101 determines that cell splitting needs to be performed, sends a message about splitting the same cell into two cells to the base station, and when determining that cell merging needs to be performed, transmitting to the base station about merging multiple cells into A message from a cell.
  • the structure of the OMC including the cell planning unit is similar to that of the RNC, and details are not described herein again.
  • the embodiments of the present invention provide a cell planning method, including cell deletion, cell splitting, and cell merging, which implements flexible networking of a cell, can perform dynamic cell planning and networking according to an actual environment, saves human resources, and improves communication. Transmission quality.
  • the embodiments of the present invention provide a device for planning a cell, a distributed base station, and the like, and implement a flexible cell networking. The spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of the invention as claimed.

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  • Mobile Radio Communication Systems (AREA)

Description

一种实现小区组网的方法及系统 技术领域
本发明涉及通信领域, 特别是涉及实现小区组网的方法及系统。 背景技术
目前现有技术中一根普通天线或一根包括多个天线单元的智能天线对应 一个小区。 随着通信用户和通信业务的迅速发展, 已有的小区资源已不能满 足需求, 为了对通信系统进行扩容, 一种方式是增加天线的数量, 以增加小 区资源, 另一种方式是将多路信号合并为一路信号。
在传统的基站系统中, 在基带与收发信机之间传输的是模拟信号。 通过 传输线路可以直接对模拟信号进行叠加, 并发送到基带侧进行处理。 但是, 在模拟信号的发送过程中, 随着传输距离的增加, 模拟信号会不断衰减。 在 实现模拟信号的远距离传输过程中, 通常使用中继设备(如干放站)对模拟 信号进行放大处理, 实现无盲区覆盖, 但是, 在放大模拟信号的同时也放大 了噪声信号, 对信号质量产生严重影响, 并存在更大的功率消耗, 而且中继 设备存在不易维护的缺点。
目前, 现有技术中出现一种射频拉远技术, 将基站中的射频单元拉远, 置于天线附近。 通过这种方式, 实现了一个基带单元(BaseBand Unit, BBU ) 可连接多个射频拉远单元( Remote Radio Unit, RRU ), 而由于受到现有硬件 水平的限制, BBU的基带解调只能支持不超过设计能力的多根天线, 例如一 个 BBU最多支持 6个子载波(每载波 8根天线配置下 ), 则一个 BBU最多支 持 48 路信号。 由于釆用传统模拟信号系统存在一些缺陷, 则考虑通过增加 RRU通道数量和相应的天线数量的方式实现无盲区覆盖,而一个 BBU的处理 能力有限, 所以这就需要增加 BBU来实现通信系统的扩容。 然而 BBU的成 本比较高, 给扩容工作带来压力。 并且, 每次扩容通信系统时都需要人为的 增设天线及相应的 RRU, 可能进一步需要增设 BBU, 这种方式占用较多的人 力资源。 而如果在建网初期便建设较多的天线和小区, 则会导致通信系统资 源的浪费。
可见, 现有技术为了满足通信业务发展的需求, 一种方式是通过叠加模 拟信号的方式来支持更多的信号量, 以实现无盲区覆盖, 但这种方式存在传 输距离较短, 受噪声信号干扰较大的问题。 另一种方式是通过人工的方式不 断的扩容通信系统, 但需要较多的人力资源。 再一种方式是在建网初期便建 设较多的天线和小区, 但会导致通信系统资源的浪费。 发明内容
本发明实施例提供一种实现小区组网的方法及系统, 用于实现小区的灵 活规划及多种形式的小区组网, 提高频谱利用率或节省网络资源。
本发明实施例提出了一种分布式基站的小区删除方法, 包括以下步骤: 删除对应同一小区的多根天线中至少一根天线上的公共信道和专用信道; 将 所述至少一根天线上的小区和公共信道的状态置为不存在; 撤除所述至少一 根天线上的无线链路。
本发明实施例提出了一种小区分裂方法, 包括以下步骤: 统计对应同一 小区的多根天线上的物理资源占用情况; 确定在预设的时间内已占用的物理 资源持续不小于预设的阔值, 并且在达到预设的时间时确定需要进行小区分 裂; 将所述同一小区分裂为至少两个小区, 并将所述多根天线分别配置到所 述至少两个小区。
本发明实施例提出了一种小区合并方法, 包括以下步骤: 统计各小区内 的物理资源占用情况; 确定存在至少两个小区, 对于至少两个小区中的每个 小区, 在预设的时间内已占用的物理资源持续不大于预设的阔值, 并且在所 述至少两个小区均达到预设的时间时确定需要进行小区合并; 将所述至少两 个小区合并为一个小区, 将对应原所述至少两个小区的多根天线配置为所述 一个小区。 本发明实施例提出了一种用于规划小区组网的装置, 包括: 统计单元, 用于统计对应同一小区的多根天线上的物理资源占用情况; 控制单元, 用于 的分裂阔值, 并且在达到预设的时间时确定该同一小区需要进行小区分裂; 以及用于确定存在至少两个小区, 该至少两个小区中每个小区的多根天线在 少两个小区均达到预设的时间时确定该至少两个小区需要进行小区合并; 配 置单元, 用于将确定需要进行小区分裂的同一小区分裂为至少两个小区, 并 将该同一小区的多根天线分别配置到分裂后的至少两个小区; 以及用于将确 定需要进行小区合并的至少两个小区合并为一个小区, 并将需要进行小区合 并的至少两个小区的多根天线配置为所述合并后的一个小区。
本发明实施例提出了一种 RRU, 包括: 外部接口单元, 用于接收和发送 消息; 射频单元, 用于连接多根天线, 并接收来自多根天线的射频信号及向 多根天线发送射频信号; 配置单元, 用于根据接收到的小区建立请求消息将 连接的所述多根天线配置为至少一个小区, 以及根据接收到的小区删除请求 消息, 将所述多根天线中至少一根天线上的小区资源删除。
本发明实施例提出了一种分布式基站, 包括: 天线, 用于接收和发射模 拟射频信号; 射频拉远单元 RRU, 与多根天线连接, 用于根据接收到的小区 建立请求消息为连接的多根天线配置至少一个小区, 以及根据接收到的小区 删除请求消息, 将同一小区下的多根天线中至少一根天线上的小区资源删除; 基带单元 BBU, 用于处理来自 RRU的数字信号。
本发明实施例提出了一种分布式基站, 包括: 天线, 用于接收和发射模 拟射频信号; 多个 RRU, 分别用于根据接收到的小区建立请求消息为本地连 接的一根天线配置小区资源, 以及根据接收到的小区删除请求消息, 将本地 连接的一根天线上的小区资源删除; 其中, 所述多个 RRU的多根天线配置有 相同的小区资源; BBU, 用于对来自 RRU的数字信号进行处理。
本发明实施例提出了一种分布式基站, 包括: 天线, 用于接收和发射模 拟射频信号; 射频拉远单元 RRU, 与多根天线连接, 用于将来自多根天线的 模拟射频信号转换为数字信号后发送, 其中, 所述多根天线对应同一个小区, 或所述多根天线中的每一部分天线分别对应到不同的小区; 基带单元 BBU, 用于处理来自 RRU的数字信号。
本发明实施例提出了一种分布式基站, 包括: 天线, 用于接收和发射模拟 射频信号; 多个 RRU, 各 RRU包括一根天线, 用于将来自天线的模拟射频信 号转换为数字信号后发送; 其中, 所述多个 RRU 的多根天线对应同一小区 BBU, 用于对来自 RRU的数字信号进行处理。
本发明实施例提供了小区规划的方法, 包括小区删除、 小区分裂和小区 合并, 实现了小区的灵活组网, 可根据实际环境进行动态的小区规划和组网, 节省了人力资源或提高了通信传输质量。 并且, 本发明实施例提供了用于规 划小区的装置和分布式基站等, 实现了灵活的小区组网。 附图说明
图 1A -图 8为本发明实施例中分布式基站的结构图;
图 9为本发明实施例中小区建立的主要方法流程图;
图 10为本发明实施例中 RNC发起小区建立时小区建立的方法流程图; 图 11为本发明实施例中 OMC发起小区建立时小区建立的方法流程图; 图 12 为本发明实施例中演进基站发起小区建立时小区建立的方法流程 图;
图 13为本发明实施例中小区删除的主要方法流程图;
图 14为本发明实施例中小区删除的具体方法流程图;
图 15为本发明实施例中小区分裂的主要方法流程图;
图 16A 为本发明实施例中根据发射功率进行小区分裂的具体方法流程 图;
图 16B 为本发明实施例中根据码道资源进行小区分裂的具体方法流程 图; 图 17为本发明实施例中小区合并的方法流程图;
图 18为本发明实施例中 RRU的基本结构图;
图 19为本发明实施例中 RRU的详细结构图;
图 20为本发明实施例中小区规划单元的结构图;
图 21为本发明实施例中 RNC的结构图。 具体实施方式
本发明实施例根据实际的环境使多根天线对应一个小区, 以节省小区资 源, 或者使多根天线对应多个小区, 以满足通信业务或通信用户的需求。
本发明实施例中的小区资源包括本地小区标识、 训练序列和物理资源等, 物理资源包括发射功率和码道资源等。
本发明实施例中的分布式基站 (简称基站) 包括通用移动通信系统 ( Universal Mobile Telecommunicaifoii System, UMTS ) 下々基占 ( Node B ) 和长期演进( Long Time Evolution, LTE )系统下的演进基站( Evolved Node B )。 本发明实施例中的天线包括普通天线、 具有多个天线单元的智能天线和非智 能天线 (如极化天线)等。 本实施例中将一根天线确定为一个通道, 连接多 根天线的 RRU为多通道 RRU, 连接单根天线的 RRU为单通道 RRU。
本发明实施例中分布式基站 (简称基站) 包括用于接收和发送模拟射频 信号的天线、 BBU和 RRU (包括多通道 RRU和单通道 RRU )等。 分布式基 站可包括多个 RRU, 多个 RRU可以是并联、 串联或混联关系。 所述混联关系 是指: 构成串联关系的多个 RRU与其它一个或多个 RRU构成并联关系, 这 些串联关系和并联关系中的所有 RRU共同构成混联关系。 本发明实施例中可 以发起小区建立和小区删除的设备包括无线网絡控制器 (Rad o Network: Controller, RNC )、 操作维护中心 ( Operation & Maintenance Center, OMC ) 和演进基站等。
分布式基站中的 BBU用于基带数字信号的处理。当由 RNC或 OMC进行 小区组网的规划时, BBU还用于转发 RNC或 OMC发送的小区建立请求消息 和小区删除请求消息。 当由演进基站进行小区组网的规划时, 分布式基站包 括小区规划单元 101 , 参见图 1A所示, 该小区规划单元 101用于规划小区, 确定小区的建立和删除等, 生成和发送小区建立请求消息和小区删除请求消 息, 可直接发送给 RRU, 或者经 BBU转发给 RRU。 该小区规划单元 101也 可归属于 BBU, 相当于由 BBU进行小区组网的规划。 其中, BBU可以为多 个, 构成 BBU资源池, 共同为连接的 RRU提供服务。
RRU用于将连接的多根天线接收到的模拟射频信号转换为数字信号后发 送, 以及将收到的数字信号转换为模拟射频信号后通过多根天线发送, 该多 根天线至少对应一个小区。 RRU还用于根据接收到的小区建立请求消息为连 接的多根天线配置至少一个小区, 以及根据接收到的小区删除请求消息, 将 所述多根天线中至少一根天线上的小区资源删除。 一个 BBU与多通道 RRU 的连接实例如图 1B所示。 多个多通道 RRU也可对应一个小区, 或者一个多 通道 RRU上的部分天线与其它多通道 RRU或单通道 RRU上的天线对应一个 小区。 该多通道 RRU可与多个单通道 RRU、 多个现有技术中的 RRU连接, 构成串联、 并联或混联关系, 并且多通道 RRU、单通道 RRU和现有技术中的 RRU可以对应一个小区。
或者, RRU用于将连接的一根天线接收到的模拟射频信号转换为数字信 号后发送, 以及将收到的数字信号转换为模拟射频信号后通过一根天线发送。 该 RRU还用于根据接收到的小区建立请求消息为连接的一根天线配置一个小 区, 以及根据接收到的小区删除请求消息, 将所述一根天线上的小区资源删 除。 多个单通道 RRU可对应一个小区, BBU与单通道 RRU的连接实例如图 2所示。 该单通道 RRU可与多个多通道 RRU、 多个现有技术中的 RRU连接, 构成串联、 并联或混联关系。
一个 BBU可连接多个 RRU, 本实施例提供一个 BBU连接多个串联关系 的 RRU的实例如图 3所示。
分布式基站还可包括一个或多个基带接口单元( BaseBand Interface Unit, BIU ), 参见图 2、 4 - 8所示, BIU用于转发 BBU与 RRU之间的数字信号, 使 RRU可以与任意 BBU连接, 使组网形式更灵活。
通过上述实施例可知, 一个 BBU连接了超过其设计能力的多根天线, 而 BBU必须在其设计能力范围内处理来自较多天线的信号, 本实施例提供合并 来自多根天线的数字信号的方法,使 BBU处理符合设计能力的多路数字信号。
合并数字信号的方法是: 依据时间同步原则, 将对应同一子载波及同一 小区的多路数字信号进行矢量叠加。将 I分量方向上对应相同子载波及同一小 区的多路数字信号, 按照相同时间位置进行叠加操作, 以及将 Q分量方向上 对应相同子载波及同一小区的多路数字信号, 按照相同时间位置进行叠加操 作。 本实施例中, 将数字信号看作是 "1 "和" 0"的连续组合, 如一路数字信号在 一个时间点上的数据为 1100, 每个' T'或" 0"即是一个数据。 按照相同的时间 点, 多路数字信号的叠加即为多路数字信号的数据按位相加, 进行二进制加 法的操作。 本实施例通过数学模型作进一步说明。 假设某个时间点的数字信 号表示为 an+jbn的形式, a表示 I分量方向上的数据, j表示 Q分量, 则 b表 示 Q分量方向上的数据, n取不同的值以标识各路数字信号。 那么, 数字信 号的合并过程可表示为:
(al +j *b 1 )+(a2+j *b2)+ ... + (an+j *bn) = (al+a2+...+an) + j*(bl+b2+...+bn) 分布式基站内部的多个单元均可进行数字信号的合并操作,如 BBU、 BIU 和 RRU均可进行合并操作。
了解了分布式基站的结构, 便可进行小区规划的操作, 包括小区建立和 小区删除。
参见图 9, 本实施例中小区建立的主要方法流程如下:
步骤 901 : 为至少两根天线分配相同的本地小区标识。
步骤 902: 为所述至少两根天线配置最大输出功率。
步骤 903: 为所述至少两根天线配置训练序列和信道资源等。
上述方法流程实现了多根天线对应一个小区, 可釆用多入多 出 ( Multiple-Input Multiple-Out-put, MIMO )系统的分集或复用技术提高小区内 的传输质量或提高小区的承载能力。 下面对小区建立的方法进行详细描述, 第一种情况是 RNC发起小区建立过程, 参见图 10所示, 具体方法流程如下: 步骤 1001 : RNC发起资源审计过程, 向 Node B发送审计请求消息, 通 知 Node B进行资源审计。 或者, Node B周期性主动向 RNC报告审计结果。
步骤 1002: RNC根据 Node B返回的审计响应消息确定需要进行小区建 立。
步骤 1003: RNC向 Node B发送小区建立请求消息。
RNC可通过在小区建立请求消息中增加信元的方式指示 Node B给具体 的天线配置小区资源, 信元如(Tl , T3 , T5 ), 表示给标识为 Tl、 Τ3和 Τ5 的天线配置相同的小区资源, 即天线 Tl、 Τ3和 Τ5对应同一小区。 可进一步 增加关于 RRU的信元, 如 ( Rl ( Tl , Τ3 , Τ5 ), R3 ( Tl , Τ2, Τ4 ) ), 表示 给标识为 R1的 RRU上标识为 Tl、 Τ3和 Τ5的天线及标识为 R3的 RRU上标 识为 Tl、 Τ2和 Τ4的天线配置相同的小区资源。 或者, RNC通过多次发送小 区建立请求消息指示 Node B给多根天线配置相同的小区资源(尤指配置相同 的本地小区标识)。 或者, RNC通过多次发送小区建立请求消息指示 Node B 给一个 RRU上的多根天线配置不同的小区资源 (尤指配置不同的本地小区标 识 )。
RNC 可进一步通过在小区建立请求消息中增加信元的方式指示 Node B 给一根天线配置多个小区, 如配置单频点小区。
步骤 1004: Node B根据收到的小区建立请求消息为多根需要配置相同小 区资源的天线分配相同的本地小区标识, 并保存分配结果。 本地小区标识是 区分小区的标志, 只要两个区域的本地小区标识不同, 则这两个区域属于不 同的小区。
Node B可根据小区建立请求消息中携带的天线标识对相应的天线进行配 置。 或者, 当小区建立请求消息中未携带天线标识时, Node B根据审计结果 确定需要进行小区建立的天线, 并根据小区建立请求消息对相应的天线进行 配置。
步骤 1005: Node B根据收到的小区建立请求消息为该多根天线配置最大 输出功率。
步骤 1006: Node B根据收到的小区建立请求消息为该多根天线配置信道 资源, 建立公共导频信道( Common Pilot Channel , CPICH )、 主同步信道 ( Primary Synchronization Channel , PSCH )、 辅助同步信道 ( Secondary Synchronization Channel , SSCH )、 主公共控制物理信道 ( Primary Common Control Physical Channel, PCCPCH ), 广播信道( Broadcast CHannel, BCH )。
第二种情况是 OMC发起小区建立过程, 参见图 11所示, 具体方法流程 下:
步骤 1101 : OMC通过控制消息触发 RNC开始小区建立。
步骤 1102: RNC收到控制消息后向 Node B发送小区建立请求消息。 步骤 1103: Node B根据收到的小区建立请求消息为需要配置相同小区资 源的多根天线分配相同的本地小区标识, 并保存分配结果。 其中, Node B根 据收到的 OMC发送的控制消息获知需要进行小区配置的天线。
步骤 1104: Node B根据收到的小区建立请求消息为该多根天线配置最大 输出功率。
步骤 1105: Node B根据收到的小区建立请求消息为该多根天线配置信道 资源。
OMC也可触发 LTE 系统中的演进基站开始小区建立, 由演进基站根据 OMC发送的控制消息对相应的多根天线进行小区配置, 以建立小区。
第三种情况是在 LTE系统中由演进基站发起小区建立过程,参见图 12所 示, 具体方法流程如下:
步骤 1201 : 演进基站根据物理资源和逻辑资源的状况发起小区建立。 步骤 1202: 演进基站为需配置相同小区资源的多根天线分配相同的本地 小区标识, 并保存分配结果。
步骤 1203: 演进基站为该多根天线配置最大输出功率。
步骤 1204: 演进基站为该多根天线配置信道资源。
参见图 13 , 本实施例中小区删除的主要方法流程如下: 步骤 1301 : 删除对应同一小区的多根天线中至少一根天线上的公共信道 和专用信道。
步骤 1302:将所述至少一根天线上的小区和公共信道的状态置为不存在。 步骤 1303: 撤除所述至少一根天线上的无线链路。
参见图 14, 本实施例中小区删除的具体方法流程如下:
步骤 1401 : 基站确定需要进行删除小区的操作。
基站可根据物理资源和逻辑资源的情况确定需要撤除某天线的小区资 源, 即删除该天线上的全部或部分小区。 或者, 基站根据 RNC发送的小区删 除请求消息确定需要进行删除小区的操作, 其中, 可由 RNC或 OMC发起小 区删除操作, 基站可根据收到的一条小区删除请求消息删除多根天线上的小 区资源, 或者根据收到的多条小区删除请求消息分别删除同一小区下的多根 天线上的小区资源。
或者, 当一根天线对应多个小区时, 基站可删除一根天线上的部分或全 部小区。
步骤 1402: 基站删除对应同一小区的多根天线中至少一根天线上的公共 信道和专用信道。
步骤 1403: 基站将所述至少一根天线上的小区和公共信道的状态置为不 存在。
步骤 1404: 基站撤除所述至少一根天线上的无线链路。
通过上述实施例的描述了解了关于多根天线的小区建立和小区删除的方 法, 那么便可进一步实现关于多根天线的小区组网的变更, 重新规划小区, 包括小区分裂和小区合并。
小区分裂是将一个小区分裂为多个小区, 可以是删除多根天线对应的一 个小区, 然后为多根天线建立至少两个小区; 或者, 删除对应同一小区的多 根天线中部分天线的小区资源, 然后为这部分天线建立新小区。 小区分裂可 适应通信业务和通信用户的发展需求, 也适用于多种实际环境的改变, 如对 应同一小区的两根天线间新建一高层建筑, 则导致这两根天线覆盖区域隔离, 阻挡无线信号的传输, 并且可能导致通信业务和通信用户的迅速增加。 小区 分裂过程可通过 OMC 进行控制。 本实施例提供一种动态进行小区分裂的方 法, 以灵活适应实际的周边环境和无线传输要求, 参见图 15所示, 主要方法 流程如下:
步骤 1501 : 统计对应同一小区的多根天线上总的物理资源占用情况。 可 同时对所有小区进行统计操作, 本实施例以一个小区为例进行详细说明。
步骤 1502: 确定在预设的时间内已占用的物理资源持续不小于预设的阔 值, 并且在达到预设的时间时确定需要进行小区分裂。
步骤 1503: 将所述同一小区分裂为至少两个小区, 并将所述多根天线分 别配置到所述至少两个小区。
其中, 物理资源包括发射功率和码道资源等, 可根据任一项物理资源进 行小区分裂, 下面分别进行详细描述。
参见图 16A, 根据发射功率进行小区分裂的具体方法流程如下: 步骤 1601 : 统计对应同一小区的多根天线的总发射功率。
步骤 1602: 当总发射功率达到功率分裂阔值时, 开始进行计时。
步骤 1603: 判断计时的时间是否达到预设的时间, 以及判断总发射功率 是否持续达到或超过功率分裂阔值。
步骤 1604: 当计时的时间达到预设的时间且总发射功率持续达到或超过 功率分裂阔值时, 发起小区分裂操作。 继续步骤 1606。 例如, 最大发射功率 为 m瓦, 预设的时间为 n天, 功率分裂阔值为 10瓦, 当总发射功率在 10至 m之间且持续 n天时, 确定需要进行小区分裂。
步骤 1605: 当计时的时间未达到预设的时间总发射功率便降到功率分裂 阔值以下时, 对计时的时间清零。 可继续步骤 1601。
步骤 1606: 将一个小区分裂为至少两个小区。 具体方式有多种, 如删除 所述至少两根天线上的小区资源, 并分别为所述至少两根天线配置不同的小 区资源; 或者, 删除所述至少两根天线中一根天线上的小区资源, 并为所述 一根天线配置不同于所述同一小区的小区资源。 可继续步骤 1601。 参见图 16B, 根据发射功率进行小区分裂的具体方法流程如下: 步骤 1611 : 统计对应同一小区的多根天线上总的码道资源占用情况, 具 体方式是对话务量进行统计。
步骤 1612: 当已占用的码道资源达到码道分裂阔值时, 开始进行计时。 步骤 1613: 判断计时的时间是否达到预设的时间, 以及判断总发射功率 是否持续达到或超过码道分裂阔值。
步骤 1614: 当计时的时间达到预设的时间且已占用的码道资源持续达到 或超过码道分裂阔值时, 发起小区分裂操作。 继续步骤 1616。
步骤 1615: 当计时的时间未达到预设的时间已占用的码道资源便降到码 道分裂阔值以下时, 对计时的时间清零。 可继续步骤 1611。
步骤 1616: 将一个小区分裂为至少两个小区。 具体方式有多种, 如删除 所述至少两根天线上的小区资源, 并分别为所述至少两根天线配置不同的小 区资源; 或者, 删除所述至少两根天线中一根天线上的小区资源, 并为所述 一根天线配置不同于所述同一小区的小区资源。 可继续步骤 1611。
上述两个实施例是分别根据发射功率和码道资源进行小区分裂的方法描 述, 可进一步将上述两个实施例结合, 当发射功率和码道资源在达到预设的 时间内均持续不低于各自对应的阔值时, 确定需要进行小区分裂。
与小区分裂过程对应的过程便是小区合并, 小区合并是将多个小区合并 为一个小区。 即删除对应多个小区的多根天线上的小区资源, 再对该多根天 线配置相同的小区资源; 或者, 删除一个小区的多根天线上的小区资源, 再 对该多根天线配置与另一小区相同的小区资源。 小区合并适用于多种实际环 境的改变, 如相邻两个小区之间的一高层建筑被拆除, 则原先阻挡的无线信 号的传输路径变得畅通, 并且可能导致通信业务和通信用户的迅速减少。 小 区合并过程可通过 OMC进行控制。本实施例提供一种动态进行小区合并的方 法, 以灵活适应实际的周边环境, 参见图 17所示, 方法流程如下:
步骤 1701 : 统计各小区内的物理资源占用情况。
步骤 1702: 确定存在至少两个小区, 对于至少两个小区中的每个小区, 并阔值), 并且在所述至少两个小区均达到预设的时间时确定需要进行小区合 并。
步骤 1703: 将所述至少两个小区合并为一个小区, 将对应原所述至少两 个小区的多根天线配置为所述一个小区。 具体实现方式有多种, 如删除所述 至少两个小区, 再为所述至少两个小区下的多根天线配置相同的小区资源; 或者如删除所述至少两个小区中一个小区对应的天线上的小区资源, 再为这 一个小区对应的天线配置与另一小区相同的小区资源。
其中, 物理资源包括发射功率和码道资源等, 可根据任一项或几项物理 资源进行小区分裂。
通过上述实施例的描述了解了分布式基站的结构和小区规划的方法, 下 面对分布式基站的内部单元的结构进行描述。
参见图 18, 本实施例中的 RRU包括外部接口单元 1801、 射频单元 1802 和配置单元 1803。
外部接口单元 1801用于连接分布式基站中的其它单元(如 BBU、 BIU或
OMC等 ), 接收和发送数字信号形式的消息。
射频单元 1802用于连接多根天线, 并接收和发送射频信号。
配置单元 1803用于根据接收到的小区建立请求消息将连接的所述多根天 线配置为至少一个小区, 以及根据接收到的小区删除请求消息, 将所述多根 天线中至少一根天线上的小区资源删除。
RRU还包括中频单元 1804和合并单元 1805, 参见图 19所示。
中频单元 1804用于将所述射频单元接收到的射频信号转换为数字信号。 合并单元 1805用于将所述数字信号中对应相同子载波及同一小区的多根 天线的数字信号矢量叠加。
参见图 20, 本实施例中用于规划小区的装置 (本实施例中称小区规划单 元) 包括统计单元 2001、 控制单元 2002和配置单元 2003。
统计单元 2001用于统计对应同一小区的多根天线的物理资源占用情况。 控制单元 2002用于确定已占用的物理资源在一定时间范围内不小于预设 的分裂阔值, 并确定需要进行小区分裂; 以及, 确定存在至少两个小区, 对 于至少两个小区中的每个小区, 在预设的时间内已占用的物理资源持续不大 于预设的合并阔值, 并且在所述至少两个小区均达到预设的时间时确定需要 进行小区合并。
配置单元 2003用于当计时的时间达到预设的时间范围且已占用的物理资 源持续达到或超过分裂阔值时, 生成小区删除请求消息和小区建立请求消息 并发送, 将所述同一小区分裂为两个小区, 所述至少两根天线分别对应所述 两个小区; 以及, 当计时的时间达到预设的时间范围且已占用的物理资源持 续不超过合并阔值时, 生成小区删除请求消息和小区建立请求消息并发送, 将所述至少两个小区合并为一个小区, 将对应原所述至少两个小区的多根天 线配置为所述一个小区。
所述小区规划单元可属于 RNC、 OMC或演进基站。 小区规划单元在演进 基站中可以以独立的单元存在, 或者整体存在于演进基站中已有的单元内, 如归属于 BBU, 或者存在于演进基站中的多个单元内,如统计单元 2001可位 于 RRU中, 控制单元 2002可位于 RRU或 BBU中, 配置单元 2003可位于 BBU中。
参见图 21 ,本实施例中的 RNC包括接口单元 2101和小区规划单元 2102。 接口单元 2101用于与连接的基站进行交互, 接收和发送消息。
小区规划单元 2102用于通过接口单元 2101对物理资源的占用情况进行 统计, 确定已占用的物理资源在一定时间范围内不小于预设的分裂阔值, 并 确定需要进行小区分裂; 以及, 确定存在至少两个小区, 对于至少两个小区 值, 并且在所述至少两个小区均达到预设的时间时确定需要进行小区合并。
由所述接口单元 2101在确定需要进行小区分裂时, 向基站发送关于将所 述同一小区分裂为两个小区的消息, 以及在确定需要进行小区合并时, 向基 站发送关于将多个小区合并为一个小区的消息。 OMC包括小区规划单元时的结构与 RNC类似, 在此不再赘述。
本发明实施例提供了小区规划的方法, 包括小区删除、 小区分裂和小区 合并, 实现了小区的灵活组网, 可根据实际环境进行动态的小区规划和组网, 节省了人力资源及提高了通信传输质量。 并且, 本发明实施例提供了用于规 划小区的装置和分布式基站等, 实现了灵活的小区组网。 发明的精神和范围。 这样, 倘若对本发明的这些修改和变型属于本发明权利 要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种分布式基站的小区删除方法, 其特征在于, 包括以下步骤: 删除对应同一小区的多根天线中至少一根天线上的公共信道和专用信 道;
将所述至少一根天线上的小区和公共信道的状态置为不存在;
撤除所述至少一根天线上的无线链路。
2、 如权利要求 1所述的小区删除方法, 其特征在于, 所述多根天线属于 相同或不同的 RRU。
3、 如权利要求 1所述的小区删除方法, 其特征在于, 所述至少一根天线 为普通天线, 和 /或包括多个天线单元的智能天线, 和 /或极化天线。
4、 如权利要求 1所述的小区删除方法, 其特征在于, 根据一条小区删除 请求消息删除所述同一小区下的多根天线上的公共信道和专用信道。
5、 一种小区分裂方法, 其特征在于, 包括以下步骤:
统计对应同一小区的多根天线上的物理资源占用情况; 达到预设的时间时确定需要进行小区分裂;
将所述同一小区分裂为至少两个小区, 并将所述多根天线分别配置到所 述至少两个小区。
6、 如权利要求 5所述的小区分裂方法, 其特征在于, 将所述同一小区分 裂为至少两个小区的步骤包括: 删除所述对应同一小区的多根天线上的小区 资源, 并分别为所述多根天线配置不同的小区资源; 或者, 删除所述对应同 一小区的多根天线中一部分天线上的小区资源, 并为所述一部分天线配置不 同于所述同一小区的小区资源。
7、 如权利要求 6所述的小区分裂方法, 其特征在于, 在配置小区资源过 程中, 当需要为多根天线配置相同的小区资源时, 根据一条小区建立请求消 息为多根天线配置相同的小区资源。
8、 如权利要求 5所述的小区分裂方法, 其特征在于, 所述对应同一小区 的多根天线属于同一射频拉远单元 RRU或属于不同的 RRU。
9、 如权利要求 5所述的小区分裂方法, 其特征在于, 所述对应同一小区 的多根天线中的一根天线为普通天线、 和 /或包括多个天线单元的智能天线、 和 /或极化天线。
10、 如权利要求 5 所述的小区分裂方法, 其特征在于, 进一步将来自所 述对应同一小区的多根天线的数字信号中对应相同子载波的多路数字信号按 照相同时间位置进行矢量叠加。
11、 一种小区合并方法, 其特征在于, 包括以下步骤:
统计各小区内的物理资源占用情况;
确定存在至少两个小区, 对于至少两个小区中的每个小区, 在预设的时 达到预设的时间时确定需要进行小区合并;
将所述至少两个小区合并为一个小区, 将对应原所述至少两个小区的多 根天线配置为所述一个小区。
12、 一种用于规划小区组网的装置, 其特征在于, 包括:
统计单元, 用于统计对应同一小区的多根天线上的物理资源占用情况; 控制单元, 用于确定同一小区的多根天线在预设的时间内已占用的物理 资源持续不小于预设的分裂阔值, 并且在达到预设的时间时确定该同一小区 需要进行小区分裂; 以及
用于确定存在至少两个小区, 该至少两个小区中每个小区的多根天线在 少两个小区均达到预设的时间时确定该至少两个小区需要进行小区合并; 配置单元, 用于将确定需要进行小区分裂的同一小区分裂为至少两个小 区, 并将该同一小区的多根天线分别配置到分裂后的至少两个小区; 以及 用于将确定需要进行小区合并的至少两个小区合并为一个小区, 并将需 要进行小区合并的至少两个小区的多根天线配置为所述合并后的一个小区。
13、 如权利要求 12所述的装置, 其特征在于, 所述装置归属于无线网络 控制器 RNC、 操作维护中心 OMC或演进基站。
14、 一种 RRU, 其特征在于, 包括:
外部接口单元, 用于接收和发送消息;
射频单元, 用于连接多根天线, 并接收来自多根天线的射频信号及向多 根天线发送射频信号;
配置单元, 用于根据接收到的小区建立请求消息将连接的所述多根天线 配置为至少一个小区, 以及根据接收到的小区删除请求消息, 将所述多根天 线中至少一根天线上的小区资源删除。
15、 如权利要求 14所述的 RRU, 其特征在于, 还包括:
合并单元, 用于将上行数字信号中对应同一小区的多根天线上对应相同 子载波的数字信号按照相同时间位置进行矢量叠加。
16、 一种分布式基站, 其特征在于, 包括:
天线, 用于接收和发射模拟射频信号;
射频拉远单元 RRU, 与多根天线连接, 用于根据接收到的小区建立请求 消息为连接的多根天线配置至少一个小区, 以及根据接收到的小区删除请求 消息, 将同一小区下的多根天线中至少一根天线上的小区资源删除;
基带单元 BBU, 用于处理来自 RRU的数字信号。
17、 如权利要求 16所述的分布式基站, 其特征在于, 由所述 BBU向所 述 RRU转发 RNC或 OMC发送的小区建立请求消息和小区删除请求消息。
18、如权利要求 16所述的分布式基站,其特征在于,由 OMC向所述 RRU 发送小区建立请求消息和小区删除请求消息。
19、 如权利要求 16所述的分布式基站, 其特征在于, 还包括: 小区规划单元, 用于进行小区规划, 并向所述 RRU发送小区建立请求消 息和小区删除请求消息。
20、 如权利要求 19所述的分布式基站, 其特征在于, 小区规划单元位于 BBU内。
21、如权利要求 16所述的分布式基站,其特征在于, 包括多个所述 RRU, 多个所述 RRU为串联、 并联或混联关系; 和 /或
所述 RRU与所述分布式基站包括的其它 RRU为串联或并联关系。
22、 如权利要求 21所述的分布式基站, 其特征在于, 多个所述 RRU中 一个所述 RRU上的至少一根天线与其它所述 RRU上的至少一根天线对应同 一小区。
23、 一种分布式基站, 其特征在于, 包括:
天线, 用于接收和发射模拟射频信号;
多个 RRU, 分别用于根据接收到的小区建立请求消息为本地连接的一根 天线配置小区资源, 以及根据接收到的小区删除请求消息, 将本地连接的一 根天线上的小区资源删除; 其中, 所述多个 RRU的多根天线配置有相同的小 区资源;
BBU, 用于对来自 RRU的数字信号进行处理。
24、 如权利要求 23所述的分布式基站, 其特征在于, 所述多个 RRU为 串联、 并联或混联关系; 和
所述多个 RRU与所述分布式基站包括的其它 RRU为串联或并联关系。
25、 一种分布式基站, 其特征在于, 包括:
天线, 用于接收和发射模拟射频信号;
射频拉远单元 RRU, 与多根天线连接, 用于将来自多根天线的模拟射频 信号转换为数字信号后发送, 其中, 所述多根天线对应同一个小区, 或所述 多根天线中的每一部分天线分别对应到不同的小区;
基带单元 BBU, 用于处理来自 RRU的数字信号。
26、如权利要求 25所述的分布式基站,其特征在于, 包括多个所述 RRU, 多个所述 RRU为串联、 并联或混联关系; 和 /或
所述 RRU与所述分布式基站包括的其它 RRU为串联或并联关系。
27、 如权利要求 26所述的分布式基站, 其特征在于, 至少两个 RRU中 每一个 RRU上的至少一根天线对应同一小区。
28、 如权利要求 27所述的分布式基站, 其特征在于, 所述分布式基站包 括的所有 RRU对应同一小区。
29、 如权利要求 25所述的分布式基站, 其特征在于, 还包括:
基带接口单元 BIU, 用于在所述 BBU与所述 RRU之间转发数字信号。
30、 如权利要求 29所述的分布式基站, 其特征在于, 所述 RRU为多个, 所述 BIU为多个; 多个所述 RRU分别通过多个所述 BIU与所述 BBU连接。
31、 如权利要求 25所述的分布式基站, 其特征在于, 分布式基站包括多 个所述 BBU。
32、 一种分布式基站, 其特征在于, 包括:
天线, 用于接收和发射模拟射频信号;
多个 RRU,各 RRU包括一根天线,用于将来自天线的模拟射频信号转换 为数字信号后发送; 其中, 所述多个 RRU的多根天线对应同一小区;
BBU, 用于对来自 RRU的数字信号进行处理。
33、 如权利要求 32所述的分布式基站, 其特征在于, 所述多个 RRU为 串联、 并联或混联关系; 和
所述多个 RRU与所述分布式基站包括的其它 RRU为串联或并联关系。
34、 如权利要求 32所述的分布式基站, 其特征在于, 还包括:
一个或多个基带接口单元 BIU, 用于在所述 BBU与所述多个 RRU之间 转发数字信号。
PCT/CN2008/001622 2007-09-21 2008-09-18 Procédé et système de mise en œuvre d'une mise en réseau de cellules WO2009049473A1 (fr)

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