WO2014075490A1 - 基于多个Smallcell基站进行小区合并的方法、SN、基站及系统 - Google Patents

基于多个Smallcell基站进行小区合并的方法、SN、基站及系统 Download PDF

Info

Publication number
WO2014075490A1
WO2014075490A1 PCT/CN2013/082494 CN2013082494W WO2014075490A1 WO 2014075490 A1 WO2014075490 A1 WO 2014075490A1 CN 2013082494 W CN2013082494 W CN 2013082494W WO 2014075490 A1 WO2014075490 A1 WO 2014075490A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
smallcell
base stations
cell
logical
Prior art date
Application number
PCT/CN2013/082494
Other languages
English (en)
French (fr)
Inventor
詹建明
Original Assignee
中兴通讯股份有限公司
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.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP13855240.1A priority Critical patent/EP2922347B1/en
Publication of WO2014075490A1 publication Critical patent/WO2014075490A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for performing cell merging based on a plurality of small cell base stations in a Wideband Code Division Multiple Access (WCDMA) system, and a signaling base station (SN, Signal NodeB) ), Smallcell base station and system.
  • WCDMA Wideband Code Division Multiple Access
  • SN Signal NodeB
  • UMTS Universal Mobile Telecommunications System
  • RNC Radio Network Controller
  • NodeB base station
  • RNC plus multi-sector integrated macro base station or RNC plus distributed base station baseband processing unit (BBU) + macro radio remote unit (RRU, Radio Remote Unit)
  • BBU base station baseband processing unit
  • RRU Radio Remote Unit
  • a small number of micro base stations complement blind spots or hotspot coverage. From the perspective of network coverage, most of them are macro cells plus a few micro cell coverage methods.
  • Smallcell mainly has the following three forms: Microcell (Microcell) (2x5w ⁇ 2x10w), Macrocell (2xlw), and picocell (Picocell) (2x250mw).
  • Smallcell specifications may be applied to outdoor hotspots or hotspots, indoor hotspots or deep hotspots.
  • the number is very large, which is several times or even ten times the number of macro stations, especially the number of Metrocells and Picocells. If large-scale deployment of Smallcells is still deployed in a traditional small base station configuration, the following problems will result:
  • the number of cells connected to the RNC is also limited, and the utilization rate is low.
  • a large number of Smallcell applications cause the RNC to be rapidly expanded.
  • the capacity of the cell number is an important bottle head, and one of the SmallCell base stations.
  • the RNC needs to allocate the resources and processing capabilities of a cell as if it were a macro cell.
  • a SmallCell base station only needs to support 16 ⁇ 32 HSPA+ users per cell. Compared with the number of users that the macro cell and SmallCell require to process, the macro cell capacity is 2-6 times the capacity of the area;
  • the main purpose of the embodiments of the present invention is to provide a method for performing cell merging based on multiple small cell base stations, a SN, a small cell base station, and a system, which are designed to prevent a large number of Smallcell base station applications from causing RNC expansion and avoid a large number of Smallcell cells.
  • the soft handover between the macro and the inter-RNC Iur soft handover between macro micro cells occurs to improve the user experience.
  • an embodiment of the present invention provides a method for performing cell merging based on multiple small cell base stations, including: after receiving a cell establishment request of an RNC, the SN establishes co-frequency logic based on a logical base station formed by combining a plurality of Smallcell base stations. a cell; wherein the control plane of the Iub interface of the base station is implemented in the SN;
  • the SN After receiving the cell establishment request of the RNC, the SN establishes the same-frequency logic 'j, the area based on the logical base station formed by combining the multiple Smallcell base stations, and includes:
  • the SN After receiving the cell establishment request of the RNC, the SN sends a cell setup request message and a common transport channel setup request message to multiple small cell base stations in the logical base station to establish a same-frequency logical cell and its common resources.
  • the data transmission by the same-frequency logical cell based on the wireless link includes:
  • the SN selects multiple Smallcell base station uplink dedicated channel (DCH, Dedicated CHannel) and enhanced dedicated channel (E-DCH, Enhanced Dedicated CHannel) data frames from the same frequency-frequency logical cell based on the corresponding wireless link.
  • DCH Smallcell base station uplink dedicated channel
  • E-DCH enhanced dedicated channel
  • Enhanced Dedicated CHannel Enhanced Dedicated CHannel
  • the performing resource management on the same-frequency logical cell based on the wireless link includes:
  • the method further includes:
  • the high speed downlink packet access (HSDPA, High Speed Downlink Packet Access) service switching of the UE is performed between multiple Smallcell base stations.
  • performing the HSDPA service switching of the UE between the multiple Smallcell base stations includes:
  • the SN receives a signal to interference ratio (SIR) value of a UL_DPCCH Pilot signal of a UE on a plurality of Samllcell base stations in the same logical cell;
  • SIR signal to interference ratio
  • the maximum SIR value continues for a predetermined time, it is determined whether the Smallcell base station corresponding to the maximum SIR value is the same as the Smallcell base station served by the current UE;
  • the physical channel of the High Speed-Physical Downlink Shared CHannel (HS-PDSCH) is sent to the UE under the Smallcell base station corresponding to the maximum SIR value;
  • connection manner is adopted between the SN and multiple Smallcell base stations: Star connection method, wireless network mesh (Mesh) networking connection method and wired Ethernet Internet (IP, Internet Protocol) connection method.
  • Wish wireless network mesh
  • IP Internet Protocol
  • the SN is deployed separately from the macro base station, and the SN and all connected Smallcell base stations form a logical base station; or the SN is integrated in the macro base station, and the macro base station and the connected all Smallcell base stations form a different
  • the logical base station is configured; or the SN is integrated in the BBU of the BBU-RRU distributed base station, and the BBU and all connected small cells constitute a heterogeneous logical base station.
  • the embodiment of the present invention further provides an SN for performing cell merging based on multiple Smallcell base stations, including:
  • a common resource establishing module configured to: after receiving a cell establishment request of the RNC, establish a co-frequency logical cell based on a logical base station formed by combining a plurality of small cell base stations; wherein, the Iub interface control plane of the base station is implemented in the SN;
  • a link establishing module configured to determine, according to an access request initiated by the UE and a radio link setup request sent by the RNC, or a location of the Smallcell where the UE is located according to the feedback information of each Smallcell, and establish the SN in the logical base station. a wireless link with the corresponding Smallcell base station;
  • a management operation module configured to perform data transmission on the same-frequency logical cell based on the wireless link.
  • the common resource establishing module is further configured to: after receiving the cell establishment request of the RNC, send a message, a zone setup request message, and a common transport channel setup request message to multiple Smallcell base stations in the logical base station, and establish the same frequency.
  • Logical community and its public resources are further configured to: after receiving the cell establishment request of the RNC, send a message, a zone setup request message, and a common transport channel setup request message to multiple Smallcell base stations in the logical base station, and establish the same frequency. Logical community and its public resources.
  • management operation module includes:
  • the selective combining module is configured to selectively combine the uplink DCH and the E-DCH data frames of the plurality of Smallcell base stations from the same frequency-frequency logical cell to the RNC according to the corresponding wireless link;
  • the downlink data distribution module is configured to distribute downlink data from the RNC to the same UE to multiple Smallcell base stations belonging to the same intra-frequency logical cell.
  • management operation module further includes:
  • a mobility management module configured to perform mobility management on terminals covered by multiple Smallcell base stations in the same frequency-frequency logical cell based on the corresponding wireless link;
  • the code channel resource management module is configured to determine, according to the feedback information of each Smallcell base station, the UE in the Smallcell overlap coverage area or the non-Smallcell overlap coverage area, and multiplex the non-Smallcell overlap coverage area HS-DPDCH code resources according to the judgment result. .
  • the mobility management module is further configured to perform HSDPA service switching of the UE between the multiple Smallcell base stations.
  • the mobility management module is further configured to receive the SIR value of the UL-DPCCH Pilot signal of the UE reported by the multiple Samllcell base stations in the same logical cell; compare each SIR value, and obtain the maximum SIR value; If the SIR value continues for a predetermined period of time, it is determined whether the Smallcell base station corresponding to the maximum SIR value is the same as the Smallcell base station served by the current UE; if not, the HS-PDSCH physical channel is scheduled to be sent to the UE under the Smallcell base station corresponding to the maximum SIR value. HSDPA data; if they are the same, continue to maintain the current service Smallcell base station status.
  • connection manners are used between the SN and the multiple Smallcell base stations: a star connection mode, a Mesh networking connection mode, and a wired Ethernet IP connection mode.
  • the SN is deployed separately from the macro base station, and the SN and all connected Smallcell base stations form a logical base station; or the SN is integrated in the macro base station, and the macro base station and the connected all Smallcell base stations form a different
  • the logical base station is configured; or the SN is integrated in the BBU of the BBU-RRU distributed base station, and the BBU and all connected small cells constitute a heterogeneous logical base station.
  • the embodiment of the invention further provides a Smallcell base station for performing cell merging based on multiple Smallcell base stations, including: a cell establishment module, configured to: after receiving the cell setup request message sent by the SN, establish a corresponding intra-frequency logical cell based on the logical base station formed by combining the plurality of Smallcell base stations;
  • the link establishing module is configured to establish, within the logical base station, a wireless link with the SN after receiving the SN initiated wireless link setup request message.
  • the embodiment of the present invention further provides a system for performing cell merging based on multiple Smallcell base stations, including: SN and multiple Smallcell base stations;
  • the SN is configured to: after receiving the cell establishment request of the RNC, establish a co-frequency logical cell based on the logical base station formed by combining the plurality of Smallcell base stations; and in the logical base station, according to the UE-initiated access request and the The radio link establishment request sent by the RNC or the location information of the small cell where the UE is located is determined according to the feedback information of each small cell, and the radio link between the SN and the corresponding Smallcell base station is established;
  • the Smallcell base station is configured to: after receiving the cell setup request sent by the SN, establish a corresponding intra-frequency logical cell based on the logical base station formed by combining the multiple Smallcell base stations; and in the logical cell, according to the wireless chain initiated by the SN
  • the path establishment request establishes a radio link between the SN and the Smallcell base station, where the lub interface control plane is separated from the lub interface user plane, and is implemented in the SN and the Smallcell base station, respectively.
  • a method for performing cell merging based on multiple Smallcell base stations, an SN, a Smallcell base station, and a system where a plurality of Smallcell base stations are combined into one logical base station, and multiple Smallcells of the same frequency are merged into one same
  • the frequency logic cell, the RNC processing resource that needs to be reserved in the same-frequency logical cell is substantially equal to the RNC processing resource that the traditional macro cell needs to reserve.
  • a large number of Smallcell base station applications can be avoided to cause RNC expansion, effectively avoiding soft handover between a large number of Smallcell cells and cross-RNC Iur soft handover between macro and micro cells, thereby avoiding the user experience degradation and reducing Lub transmission pressure and Iur transmission pressure; further, the embodiment of the present invention combines multiple cells into one same-frequency logical cell, The search sensing of the coverage area of the Smallcell base station to which the UE belongs in the same intra-frequency logical cell is implemented, thereby realizing multiplexing of HS-PDSCH code channel resources in different coverage areas of multiple Smallcell base stations, and improving the throughput of the entire same-frequency logical cell. the amount.
  • FIG. 1 is a schematic flowchart of a method for performing cell merging based on multiple Smallcell base stations according to an embodiment of the present invention
  • Figure 2-1 is an allocation relationship between the Iub interface control plane and the user plane and the SN and the Smallcell.
  • Figure 2-2 is a method for performing cell merging based on multiple Smallcell base stations in an embodiment of the present invention.
  • FIG. 2-3 is a second deployment form of the SN in the Smallcell solution according to the method for performing cell merging according to the embodiment of the present invention
  • FIG. 2-4 is a third deployment form of the SN in the Smallcell solution according to the method for performing cell merging according to the embodiment of the present invention
  • FIG. 3-1 is a schematic diagram of a star connection between the SN and a plurality of Smallcell base stations in the above embodiment (the microwave IDU is integrated into the SN;);
  • FIG. 3-2 is a schematic diagram of another star connection manner between the SN and multiple Smallcell base stations in the foregoing embodiment (the microwave IDU is not integrated into the SN);
  • FIG. 3-3 is a schematic diagram of a star connection manner in which the connection between the SN and the plurality of Smallcell base stations adopts Wlan802.11 a/g/n/ac in the above embodiment;
  • Figure 3-4 is a schematic diagram of a Mesh networking connection mode in which the connection between the SN and the plurality of Smallcell base stations is Wlan802.11 a/g/n/ac in the above embodiment;
  • 3-5 are schematic diagrams showing the connection between the SN and the plurality of Smallcell base stations in the above embodiment by using a wired Ethernet IP connection;
  • FIG. 4 is a schematic diagram of internal functional modules of the SN in the embodiment of the present invention.
  • 6a is a schematic diagram showing the internal structure of a Smallcell base station according to an embodiment of the present invention.
  • FIG. 6b is a flow chart of a timing search module of a Smallcell base station according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of management allocation of 10 HS-PDSCH code channels in a same logical cell in two Smallcell base stations in an example of the present invention
  • FIG. 8 is a schematic diagram illustrating the multiplexing and scheduling of code channel resources of HS-PDSCH in two Smallcell base stations in the case where two Smallcells are combined into one same-frequency logical cell according to FIG. 5;
  • FIG. 9 is a schematic diagram of a service connection relationship of a non-HSDPA user in multiple Smallcell base stations (belonging to the same logical cell) in the embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of another embodiment of a method for performing cell merging based on multiple Smallcell base stations according to an embodiment of the present invention.
  • FIG. 11 is a schematic flow chart of performing HSDPA service switching between UEs in multiple Smallcell base stations according to another embodiment of the method for performing cell merging according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of an SN-implementation example for performing cell merging based on multiple Smallcell base stations according to an embodiment of the present invention
  • FIG. 13 is a schematic structural diagram of a management operation module in an SN-implementation based on a plurality of Smallcell base stations according to an embodiment of the present invention
  • FIG. 14 is a schematic structural diagram of an embodiment of a Smallcell base station for performing cell merging based on multiple Smallcell base stations according to an embodiment of the present invention
  • FIG. 15 is a schematic structural diagram of an embodiment of a system for performing cell merging based on multiple Smallcell base stations according to an embodiment of the present invention. detailed description
  • the solution of the embodiment of the present invention is mainly: combining a plurality of Smallcell base stations into one logical base station on the base station side, and combining multiple small cells of the same frequency into one same-frequency logical cell, and the same-frequency logical cell needs to reserve the RNC processing resources. It is similar to the RNC processing resources that need to be reserved in the traditional macro cell. It is beneficial to deploy multiple Smallcell base stations or expand capacity in the same macro cell, avoiding a large number of Smallcell base station applications, causing RNC expansion, and avoiding soft handover between a large number of Smallcell cells. Inter-RNC Iur soft handover between macro micro cells occurs, and Iub transmission pressure and Iur transmission pressure are reduced.
  • the search perception of the coverage area of the Smallcell base station to which the UE belongs in the same intra-frequency logical cell is realized, and multiple Smallcell base stations are different.
  • the multiplexing of the HS-PDSCH code channel resources of the coverage area improves the throughput of the entire intra-frequency logical cell.
  • an embodiment of the present invention provides a method for performing cell merging based on multiple Smallcell base stations, including:
  • Step S101 After receiving the cell establishment request of the RNC, the SN establishes an intra-frequency logical cell based on the logical base station formed by combining the multiple Smallcell base stations.
  • the control plane of the Iub interface of the base station is separated from the user plane of the Iub interface, and is implemented in the SN and the Smallcell base station, respectively.
  • the embodiment of the present invention provides that, on the Smallcell low-power base station side, multiple SmallCell base stations are combined into one logical base station, and multiple Small cells of the same frequency are combined into one same-frequency logical cell, and the method performs baseband processing and signaling processing of the base station.
  • multiple SmallCell base stations are connected to the RNC through the SN. From the perspective of the RNC, multiple Smallcell base stations are subordinate to one logical base station. From the perspective of RNC processing resources, multiple Smallcells are considered.
  • the same-frequency physical cell looks like a co-frequency logical cell.
  • the RNC processing resources that need to be reserved for this logical cell are basically the same as the RNC processing resources that the traditional macro cell needs to reserve. Therefore, the solution is very advantageous in engineering. Multiple Smallcell base stations or capacity expansion are deployed in the cell.
  • the control plane of the Iub interface of the base station is separated from the user plane (refer to FIG. 2-1).
  • the Sub and the Smallcell are separated from each other. It is reflected in the separation of the control plane and the user plane of the Iub interface, so that the interaction interface between the SN and the Smallcell base station becomes a low-speed interface relationship, and the conventional microwave or low-cost wireless local area network (WLAN, Wireless Local Area Networks) can be used.
  • WLAN Wireless Local Area Networks
  • the deployment scheme of the SN may have the following types:
  • Figure 2-2 shows the first deployment of the SN in the Smallcell solution.
  • the SN is deployed separately from the macro base station. Multiple physical frequency Small cells of the same frequency are combined into one co-frequency through the SN.
  • the logical cell also implements the merging of multiple Smallcell base stations. On the RNC side, all the small cells are a logical base station, which facilitates the rapid deployment and expansion of multiple Smallcell base stations.
  • Smallcell can optionally configure Wifi (Wireless Fidelity) function as needed.
  • Wifi Wireless Fidelity
  • Figure 2-3 shows the second deployment of the SN in the Smallcell solution.
  • the SN function is integrated into a macro base station function.
  • the macro base station On the RNC side, the macro base station is connected. All Smallcell base stations are a heterogeneous logical base station.
  • Smallcell can optionally configure the Wifi function as needed.
  • Figure 2-4 shows the three deployment modes of the SN in the Smallcell solution.
  • the SN function is integrated in the BBU of a BBU-RRU distributed base station.
  • the BBU and all connected Smallcell base stations are a heterogeneous logical base station.
  • Smallcell can optionally configure the Wifi function as needed.
  • the SN and the RNC are connected through a lub interface, which is the same as the prior art, and implements a NodeB base station of a radio network layer (RNL, Radio Network Layer) on the NodeB side of the lub interface through the lub control plane module.
  • RNL Radio Network Layer
  • NBAP NodeB Application Part
  • 3GPP TS 3rd Generation Partnership Project Technical Specification
  • 3rd Generation Partnership Project Technical Specification 25.433 R99/R5/R6/R7/R8/R9/R10/Rll.
  • the lub control plane module centrally processes the lub control plane signaling of all the Smallcell base stations connected to the SN.
  • On the RNC side all the Smallcell base stations connected to the SN belong to one logical base station.
  • connection manner between the SN and each Smallcell base station may include, but is not limited to, the following:
  • Figure 3-1 shows the star connection between the SN and multiple Smallcell base stations using microwave transmission.
  • the Digital Indoor Unit (IDU) is integrated into the SN.
  • Figure 3-2 shows the star connection between the SN and multiple Smallcell base stations using microwave transmission.
  • the IDU is not integrated into the SN.
  • Figure 3-3 shows the star connection between the SN and multiple Smallcell base stations using Wlan802.11 a/g/n/ac.
  • Figure 3-4 shows the Mesh networking connection between the SN and multiple Smallcells using Wlan802.11 a/g/n/ac.
  • Figure 3-5 shows the connection between the SN and multiple Smallcell base stations using a wired Ethernet IP connection.
  • the area, which specific one-frequency logical cell corresponds to which Smallcell base station, is determined by the local configuration data of the SN.
  • Step S102 in the logical base station, determining, according to the access request initiated by the UE and the radio link setup request sent by the RNC, or determining the location of the Smallcell where the UE is located according to the feedback information of each Smallcell, establishing the SN and the corresponding The wireless link between the smallcell base stations.
  • a certain UE initiates an access request through a certain Smallcell base station
  • the RNC accepts the permission
  • it initiates a radio link establishment procedure to the SN
  • the SN may
  • the corresponding Smallcell base station initiates a radio link setup request message, and establishes a corresponding transport channel and a physical channel.
  • the internal logic flow between the SN and the Smallcell base station is basically the same as that of the traditional macro station.
  • each UE performs data transmission and enjoys resource service based on the established wireless link between the Smallcell base station and the SN.
  • Step S103 Perform data transmission on the same-frequency logical cell based on the wireless link.
  • FIG. 4 is a schematic diagram of internal functional modules of the SN in this embodiment.
  • a selective combining (SC) module a downlink data distribution module, an HS-PDSCH code channel resource management module, and a plurality of Smallcell base stations under the same intra-frequency logical cell are configured in the SN.
  • Terminal mobility management module Mobility management module
  • the selective combining module implements selective combining of uplink data for uploading the same UE data to multiple Smallcell base stations, that is, selectively combining the uplink DCH and E-DCH data frames of multiple Smallcell base stations from the same frequency-frequency logical cell. Then upload it to the RNC.
  • the downlink data distribution module implements distributing downlink data transmitted from the RNC to the same UE to a plurality of Smallcell base stations belonging to the same intra-frequency logical cell.
  • the mobility management module is configured to perform mobility management on terminals covered by multiple Smallcell base stations in the same frequency-frequency logical cell, and the implementation of the mobility management module is the basis of resource multiplexing of the HS-DPDCH code, and only the UE is identified.
  • the area covered by the Smallcell base station can implement the HS-DPDCH code resource multiplexing of different Smallcell coverage areas in the same logical cell.
  • FIG. 5 is a schematic diagram of the service connection relationship of the HSDPA user in multiple Smallcell base stations (belonging to the same logical cell). .
  • the UE in the overlapping area has only a service connection with a Smallcell base station.
  • the timing search module searches according to the information of these terminals, mainly to see whether the SIR value of the uplink UL-DPCCH Pilot signal meets the requirements to determine whether to search for a certain terminal UE, once the Smallcell base station searches for a certain UE or several UEs.
  • the Smallcell will feed back to the SN corresponding terminal UE "NodeB Communication Context", and then the SN initiates a process of establishing a wireless link to the Smallcell (replicating the original wireless link process message initiated to other Smallcells), and the Smallcell establishes a corresponding transmission.
  • the channel and physical channel is equivalent to creating another wireless link).
  • a Smallcell base station detects the SIR value of the UL DPCCH Pilot signal of the terminal in the cell.
  • the Smallcell base station feeds back to the SN corresponding terminal UE "NodeB Communication Context", and then The SN initiates a process of deleting a radio link to the Smallcell base station, and the Smallcell base station deletes the corresponding transport channel and the physical channel (from the perspective of the SN, it is equivalent to deleting a radio link).
  • the code channel resource management module is configured to determine, according to feedback information of each Smallcell base station, whether the UE overlaps the coverage area in the Smallcell; and multiplex the non-Small Cell overlap coverage area HS-DPDCH code resources according to the determination result.
  • the SN manages the small cell base station overlap area HS-PDSCH code resource in the same frequency-frequency logical cell, and immediately notifies all the Smallcell base stations mapped to the same-frequency logical cell.
  • the downlink code resource is limited (generally, the maximum of 15 HS-DPDCH code resources;). Since the embodiment of the present invention implements cell merging for multiple Smallcell base stations, multiple intra-frequency physical cells are mapped to A logical cell, in order to maximize the user downlink data experience under the coverage of each Smallcell base station, this embodiment proposes a management solution for HS-DPDCH code resource reuse, which needs to be managed for the same intra-frequency logical cell.
  • the HS-DPDCH code resource includes two types of resources: a small cell overlap region HS-PDSCH code resource and each Smellcell non-overlapping region HS-PDSCH code resource, wherein the Smellcell non-overlapping region HS-PDSCH code resource can be multiplexed.
  • FIG. 6a is a schematic diagram of the internal structure of the Smallcell base station in this embodiment.
  • all the Smallcell base stations include a timing search module (UL-DPCCH Scrambling code scan & Pilot SIR Evaluation) and a high-precision clock synchronization module. (High-Accuracy Time synchronization), where:
  • the terminal UE under the cover also searches for the terminal UE that does not belong to the coverage of the Smallcell base station but belongs to the same logical cell.
  • the purpose of the search is to determine in a timely manner whether the terminal UEs belonging to the same cell enter the coverage of the Smallcell base station.
  • the area where the UE belongs to the coverage of two or more small cell base stations the area is marked as "Smallcell overlap area", and the area where the UE only belongs to one Smallcell base station is marked as "Smallcell non-overlapping area”.
  • the timing search module flow refers to FIG. 6b. .
  • the embodiment of the present invention requires a high-precision clock synchronization module that ensures clock synchronization transmission signals of all Smallcell base stations in the same frequency-frequency logical cell.
  • the Smallcell base station processes the uplink and downlink data of the UE.
  • the downlink codeword resources used are still specified by the RNC.
  • the "Smallcell overlapping area UE" and the “Smallcell non-overlapping area UE” are required to be differentiated in the shared physical channel HS-PDSCH code channel scheduling.
  • the overlap region HS-PDSCH code channel resource is used; for all "Smallcell non-overlapping region UEs", the used HS-PDSCH code channel resource is allocated to the HS-DPDCH of the same-frequency logical cell for the RNC.
  • FIG. 4 is a schematic diagram of internal functional modules of the SN in this embodiment
  • FIG. 5 is a schematic diagram of service connection relationships of HSDPA users in multiple Smallcell base stations (belonging to the same logical cell)
  • FIG. 7 is 10 HSs in the same logical cell.
  • FIG. 8 is a diagram illustrating multiplexing of code channel resources of HS-PDSCH in the case where two Small cells are combined into one same-frequency logical cell in two Smallcell base stations based on FIG. And a schematic diagram of the situation being scheduled.
  • FIG. 5 shows that Smallcell1 and Smallcell2 are two adjacent smallcell base stations, and the code channel resource management module included in the SN in FIG. 4 allocates HS-PDSCH code channel resources scheduled by Smallcell1 and Smallcell2, and the two Smllcells.
  • the same-frequency cells of the base station are combined into one logical cell, where the Smallcell1 base station is the HS-DSCH serving physical cell of UE1, UE2, UE5, and UE7, and the Smallcell2 base station is the HS-DSCH serving physical cell of UE3, UE4, UE6, and UE8, UE2 and
  • the UE3 is in the coverage overlap area of the Smallcell1 and the Smallcell2.
  • the HS-PDSCH code channel resources used by the UE2 and the UE3 may not be the same. This requires the SN to notify the same-frequency logic immediately when the SN determines that the UE is an overlapped area. All the Smallcell base stations in the area need to be configured with different HS-PDSCH code channel resources for the HSDPA users in the overlap area (specify different code channels and code channels).
  • Both UE2 and UE3 are HSDPA users in the overlapping area.
  • Smallcell1 and Smallcell2 are the HS-DSCH serving physical cells of UE2 and UE3, respectively, but belong to the same intra-frequency logical cell. Therefore, UE2 is different for overlapping users in the overlapping area.
  • the HS-PDSH code channel data of the user in the overlap region is the code channel 1 and the code channel 2
  • the HS-PDSCH code channel configured by the user in the overlap region is the code channel. 3 and code channel 4, this function is performed by the code channel resource management module of FIG.
  • UE1, UE5 and UE7 are HSDPA users in the non-overlapping coverage area of Smallcell1
  • UE4, UE6 and UE8 are HSDPA users in the non-overlapping coverage area of Smallcell2, due to The non-overlapping coverage area of Smallcell1 does not overlap with the non-overlay area of Smallcell2, so there is a feasible line for implementing multiplexing of HS-PDSCH code channel resources.
  • the RNC is configured with 10 HS-PDSCH code channel resources (1 to 10 number channels) of the same-frequency logical cell. As shown in FIG. 7 and FIG. 8, the 1 and 2 code channels in the Smallcell #1 are overlapped and non-overlapping. The area is scheduled by time division multiplexing.
  • the 3 and 4 code channels are scheduled in the overlapped and non-overlapping areas by time division multiplexing.
  • Smallcell1 configures three HS-SCCH channels
  • Smallcell2 also configures another three HS-SCCHs.
  • the HS-SCCH code channels of the two Smallcells are different.
  • the implementation of the SN-based mobility management module and the timing search module of the Smallcell base station is completed, and the specific process is implemented. as follows:
  • the timing search module searches according to the information of these terminals. Referring to FIG. 5, it mainly depends on whether the SIR value of the uplink UL_DPCCH Pilot signal is greater than a preset threshold (coverage threshold) to determine whether a terminal UE is searched, and the Smallcell base station searches. To a certain UE or a few UEs, Smallcell will feed back to the terminal UE "NodeB Communication Context" corresponding to the SN.
  • FIG. 9 is a non-HSDPA user.
  • a schematic diagram of a service connection relationship between multiple Smallcell base stations (which belong to the same logical cell), wherein UE2 simultaneously receives downlink signals (same downlink signals) of multiple Smallcell base stations; UE1 and UE3 receive downlink signals of Smallcell1 base stations and Smallcell2 base stations, respectively.
  • a SmallCell base station detects the SIR value of the UL DPCCH Pilot signal of the terminal in the cell. Once the SIR of the uplink UL-DPCCH Pilot signal is lower than the preset threshold (coverage threshold), the Smallcell base station feeds back to the terminal UE corresponding to the SN. "NodeB Communication Context", then the SN initiates a process of deleting the radio link to the Smallcell base station, and the SmallCell base station deletes the corresponding transport channel and physical channel (from the perspective of the SN, it is equivalent to deleting a radio link).
  • the uplink service can be transmitted to the SN through two different Smallcell base stations, and the selective combining module in the SN is for uplink DCH and E-DCH data from multiple SmallCell base stations belonging to the same logical cell.
  • the frames are selectively merged and then uploaded to the RNC.
  • the downlink service is replicated by the downlink data distribution module of the SN and sent to the Smallcell base station to which the UE belongs.
  • the foregoing solution is implemented to enable the deployment of multiple Smallcell base stations or capacity expansion in the same macro cell, to avoid a large number of Smallcell base station applications, thereby causing RNC expansion, and effectively avoiding soft handover between a large number of Smallcell cells and between macro and micro cells.
  • the cross-RNC Iur soft handover occurs, thereby avoiding the user experience degradation caused by the reduction of the Iub transmission pressure and the Iur transmission pressure; in addition, the embodiment of the present invention combines multiple cells into one same-frequency logical cell.
  • Another embodiment of the present invention provides a method for performing cell merging based on multiple Smallcell base stations. After the foregoing step S103, the method further includes: Step S104, in multiple The HSDPA service switching of the UE is performed between the smallcell base stations.
  • the mobility management module can also implement the terminal HSDPA service Smallcell service base station change process (similar to the serving cell change process between HSDPA co-frequency cells), and the function is implemented based on the SN.
  • the mobility management module and the timing search module of the Smallcell base station cooperate to complete.
  • the step S104 the step of performing HSDPA service switching between the UEs of the multiple Smallcell base stations includes:
  • Step S1041 S receives the SIR value of the UL_DPCCH Pilot signal of the UE reported by the multiple Samllcell base stations in the same logical cell.
  • Step SI 042 compare each SIR value and obtain the maximum SIR value among them.
  • Step S1043 If the maximum SIR value continues for a predetermined time, determine whether the Smallcell base station corresponding to the maximum SIR value is the same as the Smallcell base station served by the current UE.
  • Step S1044 If different, the HS-PDSCH physical channel scheduled by the Smallcell base station corresponding to the maximum SIR value sends HSDPA data to the UE.
  • Step S1045 if they are the same, continue to maintain the current state of the serving Smallcell base station. More specifically, in order to implement HSDPA service switching between multiple Smallcell base stations, the UEs in the same or the same frequency-frequency logical cell are in the same-frequency logical cell. The SIR values of the UL-DPCCH Pilot signals reported by the multiple Samllcell base stations are compared to determine which Smallcell base station can schedule the HS-PDSCH physical channel for the UE.
  • the SN is The HS-PDSCH physical channel scheduled under the Smallcell base station.
  • the HSDPA data is sent to the terminal UE, and the other Smallcell base stations in the same frequency-frequency logical cell cannot schedule the HS-PDSCH physical channel to serve the UE. If the Smallcell base station is the same as the Smallcell base station currently served by the UE, the current Service Smallcell Base Station Status.
  • this embodiment has the following advantages:
  • the HS-PDSCH code channel resource of the same logical cell is spatially multiplexed in multiple Smallcells, and the downlink throughput of the logical cell of the hot spot area is improved.
  • the SN of the embodiment of the present invention further includes other processing modules, including Iub interface user plane processing, MAC-hs/MAC-e, uplink RAKE multipath demodulation and symbol level processing, downlink symbol level processing, and expansion. Modules for frequency modulation processing, transceiver processing, power amplifiers, and duplex filtering.
  • the embodiment of the invention implements code multiplexing based on the SN-Smallcell architecture in the WCDMA wireless system, and can be used indoors and outdoors.
  • an embodiment of the present invention provides an SN for performing a J-area merging based on a plurality of Smallcell base stations, including: a common resource establishing module 201, a link establishing module 202, and a management operation module 203, where The common resource establishing module 201 is configured to: after receiving the cell establishment request of the RNC, establish a co-frequency logical cell based on the base station formed by combining the plurality of Smallcell base stations;
  • the control plane of the Iub interface of the base station is separated from the user plane of the Iub interface, and is implemented in the SN and the Smallcell base station, respectively.
  • the link establishing module 202 is configured to determine, according to the access request initiated by the UE, the radio link setup request sent by the RNC, or the location information of the Smallcell according to the feedback information of each Smallcell, in the logical base station, to establish the location a wireless link between the SN and the corresponding Smallcell base station;
  • the management operation module 203 is configured to perform data transmission on the same-frequency logical cell based on the wireless link.
  • the management operation module 203 includes: a selective merge module 2031, a downlink data distribution module 2032, a mobility management module 2033, and a code channel resource management module 2034, where
  • the selective combining module 2031 is configured to selectively combine the uplink DCH and the E-DCH data frames of the multiple small cell base stations from the same frequency-frequency logical cell to the RNC according to the corresponding wireless link;
  • the downlink data distribution module 2032 is configured to distribute downlink data from the RNC to the same UE to a plurality of Smallcell base stations belonging to the same intra-frequency logical d.
  • the mobility management module 2033 is configured to perform mobility management on the terminals covered by the multiple Smallcell base stations in the same intra-frequency logical cell based on the corresponding wireless link.
  • the code channel resource management module 2034 is configured to determine, according to the feedback information of each Smallcell base station, whether the UE overlaps the coverage area in the Smallcell, and multiplex the Small Cell overlap coverage area HS-DPDCH code resources according to the determination result.
  • the common resource establishing module 201, the link establishing module 202, and the management operating module 203 and the submodule thereof in the SN may be implemented by a central processing unit (CPU, in the SN). Central Processing Unit), or Digital Signal Processor (DSP), or Field-Programmable Gate Array (FPGA).
  • CPU central processing unit
  • DSP Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • the embodiment of the present invention provides that, on the Smallcell low power base station side, multiple SmallCell base stations are combined into one logical base station, and multiple Small cells of the same frequency are combined into one same frequency logical cell, and the method basebands the base station.
  • the processing is separated from the signaling processing.
  • multiple SmallCell base stations are connected to the RNC through the SN (Signal NodeB).
  • SN Signal NodeB
  • From the RNC side multiple Smallcell base stations are subordinate to one logical base station, and from the RNC.
  • the same-frequency physical cell of multiple Smallcells is regarded as a co-frequency logical cell.
  • the RNC processing resources that need to be reserved for this logical cell are basically equal to the RNC processing resources that need to be reserved by the traditional macro cell, so the solution It is very advantageous in engineering to deploy multiple Smallcell base stations or expand capacity under the same macro cell.
  • the Iub interface control plane of the base station is separated from the user plane (refer to FIG. 2-1), and is implemented in the S and Smallcell base stations respectively.
  • the Iub interface control plane is implemented in the SN, and the Iub interface user plane is in the Smallcell.
  • the Smallcell base station also implements baseband processing and radio frequency processing on the user plane data, and the separation of the SN and the Smallcell base station is reflected in the separation of the control plane and the user plane of the Iub interface, so that the interaction interface between the SN and the Smallcell base station becomes
  • the low-speed interface relationship can use traditional microwave or low-cost WLAN as the transmission method between the SN and the Smallcell base station, because the low-cost transmission deployment is one of the key factors for the rapid deployment of a large number of Smallcell base stations.
  • the SN-Smallcell architecture can effectively avoid the problem of insufficient fiber resources in the actual network deployment or high network construction cost caused by laying optical fibers. It can use low-cost WLAN or microwave transmission. .
  • the deployment scheme of the SN may have the following types:
  • Figure 2-2 shows the first deployment of the SN in the Smallcell solution.
  • the SN is deployed separately from the macro base station. Multiple physical frequency Small cells of the same frequency are combined into one co-frequency through the SN.
  • Logical cell in addition to the integration of multiple Smallcell base stations, on the RNC side All the smallcells are a logical base station, which facilitates rapid deployment and expansion of multiple Smallcell base stations.
  • Smallcell can optionally configure the Wifi function as needed.
  • Figure 2-3 shows the second deployment of the SN in the Smallcell solution.
  • the SN function is integrated into a macro base station function.
  • the macro base station On the RNC side, the macro base station is connected. All Smallcell base stations are a heterogeneous logical base station.
  • Smallcell can optionally configure the Wifi function as needed.
  • Figure 2-4 shows the third deployment of S in the Smallcell solution.
  • the SN function is integrated in the BBU of a BBU-RRU distributed base station.
  • the BBU is viewed from the RNC side. All connected Smallcell base stations are a heterogeneous logical base station.
  • Smallcell can optionally configure the Wifi function as needed.
  • the SN and the RNC are connected through a lub interface, which is the same as the prior art, and implements the NBAP function of the NodeB application part of the Radio Network Layer on the NodeB side of the lub interface through the lub control plane module, and complies with 3GPP TS 25.433. R99/R5 R6/R7/R8 R9/R10 protocol.
  • the lub control plane module centrally processes lub control plane signaling of all Smallcell base stations connected to the SN. On the RNC side, all Smallcell base stations connected to the SN belong to one logical base station.
  • connection manner between the SN and each Smallcell base station may include, but is not limited to, the following:
  • Figure 3-1 shows the star connection between the SN and multiple Smallcell base stations using microwave transmission.
  • the microwave IDU is integrated into the SN.
  • Figure 3-2 shows the star connection between the SN and multiple Smallcell base stations using microwave transmission.
  • the microwave IDU is not integrated into the SN.
  • Figure 3-3 shows the star connection between the SN and multiple Smallcell base stations using Wlan802.11 a/g/n/ac.
  • Figure 3-4 shows the connection between the SN and multiple Smallcell base stations.
  • Figure 3-5 shows the connection between the SN and multiple Smallcell base stations using a wired Ethernet IP connection.
  • a certain UE initiates an access request through a certain Smallcell base station
  • the RNC accepts the permission
  • it initiates a radio link establishment procedure to the SN
  • the SN may
  • the corresponding Smallcell base station initiates a radio link setup request message, and establishes a corresponding transport channel and a physical channel.
  • the internal logic flow between the SN and the Smallcell base station is basically the same as that of the traditional macro station.
  • each UE performs data transmission and enjoys resource service based on the established wireless link between the Smallcell base station and the SN.
  • a selective combining (SC) module 2031, a downlink data distribution module 2032, a code channel resource management module 2034, and a plurality of Smallcell base stations under the same intra-frequency logical cell are further disposed in the SN.
  • the mobility management module (Mobility management module) 2033 of the terminal (refer to the internal structure block diagram of the SN in FIG. 4).
  • the selective combining module 2031 implements selective combining of uplink data of the same UE data to multiple Smallcell base stations, that is, selecting uplink DCH and E-DCH data frames of multiple Smallcell base stations from the same frequency-frequency logical cell. After the merge, upload it to the RNC.
  • the downlink data distribution module 2032 implements distributing downlink data transmitted from the RNC to the same UE to multiple Smallcell base stations belonging to the same intra-frequency logical cell. Thereby, data transmission to the intra-frequency logical cell is implemented by the selective combining module 2031 and the downlink data distribution module 2032.
  • the mobility management module 2033 is configured to perform mobility management on terminals covered by multiple Smallcell base stations in the same frequency-frequency logical cell, and the implementation of the mobility management module 2033 is the basis of HS-DPDCH code resource multiplexing, and only identification
  • the HS-DPDCH code resource multiplexing of different Smallcell coverage areas in the same logical cell can be realized only in the area covered by the Smallcell base station where the UE is located.
  • FIG. 5 is a schematic diagram of the service connection relationship of the HSDPA user in multiple Smallcell base stations (belonging to the same logical cell). .
  • the UE in the overlapping area has only a service connection with a Smallcell base station.
  • the timing search module searches according to the information of these terminals, mainly to see whether the SIR value of the uplink UL-DPCCH Pilot signal meets the requirements to determine whether to search for a certain terminal UE, once the Smallcell base station searches for a certain UE or several UEs.
  • the Smallcell will feed back to the SN corresponding terminal UE "NodeB Communication Context", and then the SN will The Smallcell initiates the process of establishing a radio link (replicating the process of establishing a radio link procedure initiated by the other Smallcell), and the Smallcell establishes a corresponding transport channel and a physical channel (from the perspective of the SN, it is equivalent to creating another radio link).
  • a Smallcell base station detects the SIR value of the UL DPCCH Pilot signal of the terminal in the cell. Once the SIR value of the uplink UL_DPCCH Pilot signal does not meet the requirements, the Smallcell base station feeds back to the SN corresponding terminal UE "NodeB Communication Context", and then The SN initiates a process of deleting a radio link to the Smallcell base station, and the Smallcell base station deletes the corresponding transport channel and the physical channel (from the perspective of the SN, it is equivalent to deleting a radio link).
  • the code channel resource management module 2034 is configured to determine, according to the feedback information of each Smallcell base station, whether the UE overlaps the coverage area in the Smallcell; and multiplex the non-Small Cell overlap coverage area HS-DPDCH code resources according to the determination result.
  • the SN manages the small cell base station overlap area HS-PDSCH code resource in the same frequency-frequency logical cell, and immediately notifies all the Smallcell base stations mapped to the same-frequency logical cell.
  • the downlink code resource is limited (generally, the maximum of 15 HS-DPDCH code resources;). Since the embodiment of the present invention implements cell merging for multiple Smallcell base stations, multiple intra-frequency physical cells are mapped to A logical cell, in order to maximize the user downlink data experience under the coverage of each Smallcell base station, this embodiment proposes a management solution for HS-DPDCH code resource reuse, which needs to be managed for the same intra-frequency logical cell.
  • the HS-DPDCH code resource includes two types of resources: a small cell overlap region HS-PDSCH code resource and each Smellcell non-overlapping region HS-PDSCH code resource, wherein the Smellcell non-overlapping region HS-PDSCH code resource can be multiplexed.
  • the selective merge module 2031, the downlink data distribution module 2032, the code channel resource management module 2034, and the mobility management module 2033 in the foregoing SN may be used in the SN by the SN.
  • FIG. 6a is a schematic diagram of the internal structure of the Smallcell base station in this embodiment.
  • all the Smallcell base stations include a timing search module of a timing search terminal and a high-precision clock synchronization module, where
  • the Timing search module all the Smallcell base stations not only search for the terminal UEs covered by the Smallcell base station, but also search for the terminal UEs that are not covered by the Smallcell base station but belong to the same logical cell.
  • the purpose of the search is to timely determine that they belong to the same cell. Whether the terminal UE enters the coverage of the Smallcell base station.
  • the area covered by the UE to which two or more small cell base stations are simultaneously covered is marked as "Smallcell overlap area", and the area covered by the UE only belonging to one small cell base station is marked as "Smallcell non-overlapping area”.
  • the timing search module flow is shown in Figure 6b.
  • the embodiment of the present invention requires a high-precision clock synchronization module that ensures clock synchronization transmission signals of all Smallcell base stations in the same frequency-frequency logical cell.
  • the Smallcell base station processes the uplink and downlink data of the UE.
  • the downlink codeword resources used are still specified by the RNC.
  • the UE of the "Smallcell overlap region” and the “Smallcell non-overlapping region UE” are required to be distinguished on the shared physical channel HS-PDSCH code channel scheduling. Wait.
  • the overlap region HS-PDSCH code channel resource is used; for all "Smallcell non-overlapping region UEs", the HS-PDSCH code channel resource used is allocated to the HS-DPDCH of the same-frequency logical cell for the RNC. The number of code channel resources, so that the non-overlapping area UE of each Smallcell base station can reuse the same HS-PDSCH code channel resource.
  • FIG. 4 is a schematic diagram of internal functional modules of the SN in this embodiment
  • FIG. 5 is a schematic diagram of service connection relationships of HSDPA users in multiple Smallcell base stations (belonging to the same logical cell)
  • FIG. 7 is 10 HSs in the same logical cell.
  • FIG. 8 is a diagram illustrating multiplexing of code channel resources of HS-PDSCH in the case where two Small cells are combined into one same-frequency logical cell in two Smallcell base stations based on FIG. And a schematic diagram of the situation being scheduled.
  • FIG. 5 shows that Smallcell1 and Smallcell2 are two adjacent smallcell base stations, and the code channel resource management module 2034 included in the SN in FIG. 4 allocates HS-PDSCH code channel resources scheduled by Smallcell1 and Smallcell2.
  • the same-frequency cells of the Smllcell base station are combined into one logical cell, wherein the Smallcell1 base station is the HS-DSCH serving physical cell of UE1, UE2, UE5, and UE7, and the Smallcell2 base station is the HS-DSCH serving physical cell of UE3, UE4, UE6, and UE8, UE2 And the UE3 is in the coverage overlap area of the Smallcell1 and the Smallcell2.
  • the HS-PDSCH code channel resources used by the UE2 and the UE3 are not the same, and the SN needs to notify the same-frequency logic immediately when the SN determines that the UE is an overlapped area. '], all Smallcell base stations under the zone need to configure different HS-PDSCH code channel resources for HSDPA users in the overlap zone (need to indicate different code channels and code channels).
  • Both UE2 and UE3 are HSDPA users in the overlapping area.
  • Smallcell1 and Smallcell2 are the HS-DSCH serving physical cells of UE2 and UE3, respectively, but belong to the same intra-frequency logical cell. Therefore, UE2 is different for overlapping users in the overlapping area.
  • UE3's HS-PDSH code The channel data cannot be the same.
  • the HS-PDSCH code channel configured by the user in the overlap region is the code channel 1 and the code channel 2
  • the HS-PDSCH code channel configured by the user in the overlap region is the code channel 3 and the code channel 4.
  • a function is performed by the code channel resource management module 2034 of FIG.
  • UE1, UE5, and UE7 are HSDPA users in the non-overlapping coverage area of Smallcell1.
  • UE4, UE6, and UE8 are HSDPA users in the non-overlapping coverage area of Smallcell2. Since the non-overlapping coverage area of Smallcell1 does not overlap with the non-overlay area of Smallcell2, Then, there is a feasible line for realizing multiplexing of HS-PDSCH code channel resources.
  • the RNC is configured with 10 HS-PDSCH code channel resources (1 to 10 number channels) of the same-frequency logical cell. As shown in FIG. 7 and FIG. 8, the 1 and 2 code channels in the Smallcell #1 are overlapped and non-overlapping. The area is scheduled by time division multiplexing.
  • the 3 and 4 code channels are scheduled in the overlapped and non-overlapping areas by time division multiplexing.
  • Smallcell1 configures three HS-SCCH channels
  • Smallcell2 also configures another three HS-SCCHs.
  • the HS-SCCH code channels of the two Smallcells are different.
  • the implementation of the SN-based mobility management module 2033 and the timing search module of the Smallcell base station is completed, and the specific process is completed.
  • the implementation is as follows:
  • the timing search module will search according to the information of these terminals, refer to Figure 5, mainly Whether the SIR value of the UL_DPCCH Pilot signal is greater than a preset threshold (coverage threshold) to determine whether a terminal UE is searched for. Once the Smallcell base station searches for a UE or a certain UE, the Smallcell feeds back to the terminal UE corresponding to the SN. "NodeB Communication Context”.
  • the SN initiates a process of establishing a wireless link to the Smallcell base station (copying to other
  • FIG. 9 is a non-HSDPA user.
  • a schematic diagram of a service connection relationship between multiple Smallcell base stations (which belong to the same logical cell), wherein UE2 simultaneously receives downlink signals (same downlink signals) of multiple Smallcell base stations; UE1 and UE3 receive downlink signals of Smallcell1 base stations and Smallcell2 base stations, respectively.
  • a SmallCell base station detects the SIR value of the UL DPCCH Pilot signal of the terminal in the cell. Once the SIR of the uplink UL-DPCCH Pilot signal is lower than the preset threshold (coverage threshold), the Smallcell base station feeds back to the terminal UE corresponding to the SN. "NodeB Communication Context", then the SN initiates a process of deleting the radio link to the Smallcell base station, and the SmallCell base station deletes the corresponding transport channel and physical channel (from the perspective of the SN, it is equivalent to deleting a radio link).
  • the uplink service may be transmitted to the SN through two different Smallcell base stations, and the selective combining module 2031 in the SN is configured to uplink DCH and E-DCH from multiple SmallCell base stations belonging to the same logical cell.
  • the data frames are selectively combined and then uploaded to the RNC.
  • the downlink service is replicated and sent to the Smallcell base station covered by the UE by the downlink data distribution module 2032 of the SN, and is referred to FIG.
  • the embodiment may further implement a terminal HSDPA service Smallcell serving base station change process (similar to a serving cell change process between HSDPA co-frequency cells) through the mobility management module 2033, where the function implements the SN-based mobility management module 2033 and Smallcell base The station's timing search module works together to complete.
  • a terminal HSDPA service Smallcell serving base station change process similar to a serving cell change process between HSDPA co-frequency cells
  • the SN is based on the same frequency-frequency logical cell for the UEs in the same-frequency logic and the two or more Smallcell overlapping areas under the area.
  • the SIR values of the UL_DPCCH Pilot signals reported by the plurality of Samllcell base stations are compared to determine which Smallcell base station can schedule the HS-PDSCH physical channel for the UE.
  • the SN may determine that the HS-PDSCH physical channel scheduled by the Smallcell base station transmits HSDPA data to the terminal UE, and the other Smallcell base stations under the same frequency-frequency logical cell cannot schedule the HS-PDSCH physical channel to serve the UE.
  • the Smallcell base station is the same as the Smallcell base station currently served by the UE, and then continues to maintain the current serving Smallcell base station status.
  • this embodiment has the following advantages:
  • the SN of the embodiment of the present invention further includes other processing modules, including Iub interface user plane processing, MAC-hs/MAC-e, uplink RAKE multipath demodulation and symbol level processing, downlink symbol level processing, and expansion.
  • modules for frequency modulation processing, transceiver processing, power amplifiers, and duplex filtering can be implemented by CPUs, DSPs, or FPGAs in the SN.
  • the embodiment of the invention implements code multiplexing based on the SN-Smallcell architecture in the WCDMA wireless system, and can be used indoors and outdoors.
  • a preferred embodiment of the present invention provides a smallcell base station for performing cell merging based on multiple small cell base stations, including: a cell establishment module 301 and a link establishment module 302;
  • the cell establishment module 301 is configured to: after receiving the cell setup request message sent by the SN, establish a corresponding intra-frequency logical cell based on the logical base station formed by combining the plurality of Smallcell base stations; the link establishment module 302 is configured to be in the logical base In the station, a radio link with the SN is established after receiving the SN initiated radio link setup request message.
  • the link establishment module 302 is configured to be in the logical base In the station, a radio link with the SN is established after receiving the SN initiated radio link setup request message.
  • the cell establishment module 301 and the link establishment module 302 in the Smallcell base station may be implemented by a CPU, a DSP, or an FPGA in the SN.
  • a preferred embodiment of the present invention provides a system for cell merging based on a plurality of Smallcell base stations, including: an SN 401 and a plurality of Smallcell base stations 402;
  • the SN 401 is configured to: after receiving the cell establishment request of the RNC, establish a co-frequency logical cell based on the logical base station formed by combining the plurality of Smallcell base stations 402; and in the logical base station, according to the access request initiated by the UE and the Determining the location of the Smallcell where the UE is located according to the radio link setup request sent by the RNC or establishing the radio link between the SN and the corresponding Smallcell base station 402 according to the feedback information of each Smallcell base station 402;
  • the Smallcell base station 402 is configured to: after receiving the cell setup request sent by the SN 401, The logical base station formed by combining the plurality of Smallcell base stations 402 establishes a corresponding intra-frequency logical cell; and in the logical cell, establishes a wireless chain between the SN401 and the Smallcell base station 402 according to the radio link setup request initiated by the SN401. road.
  • the Iub interface control plane is separated from the Iub interface user plane and implemented in the SN and Smallcell base stations respectively.
  • the embodiment of the present invention is based on a method for performing cell merging by a plurality of Smallcell base stations, a SN, a Smallcell base station, and a system, where a plurality of Smallcell base stations are combined into one logical base station, and a plurality of Smallcells of the same frequency are combined into one same-frequency logical cell.
  • the RNC processing resource that needs to be reserved in the same-frequency logical cell is basically the same as the RNC processing resource that is reserved in the traditional macro's area, and the solution is beneficial to deploying multiple Smallcell base stations or expanding in the same macro cell.
  • the embodiment of the present invention combines the four-cell multiple cells into one same-frequency logical cell, and realizes the search perception of the coverage area of the Smallcell base station to which the UE belongs in the same intra-frequency logical cell, thereby realizing HS-PDSCH with different coverage areas of multiple Smallcell base stations Multiplexed channel resource, to enhance the overall throughput of the same frequency logic cells.

Abstract

本发明涉及一种基于多个Smallcell基站进行小区合并的方法、SN、基站及系统，其方法包括：SN在接收到RNC的小区建立请求后，基于多个Smallcell基站合并形成的逻辑基站建立同频逻辑小区；基站的Iub接口控制面在SN中实现；建立SN与对应的Smallcell基站之间的无线链路；基于无线链路对同频逻辑小区进行数据传输及资源管理。本发明可避免大量的Smallcell基站应用导致RNC扩容及大量Smallcell小区之间的软切换以及宏微小区之间的跨RNC Iur软切换发生；还可实现HS-PDSCH码道资源的复用，提升同频逻辑小区的吞吐量。

Description

基于多个 Smallcell基站进行小区合并的方法、 SN、 基站及系统 技术领域
本发明涉及通信技术领域， 尤其涉及宽带码分多址 （WCDMA , Wideband Code Division Multiple Access ) 系统中一种基于多个微小区 ( Smallcell )基站进行小区合并的方法、 信令基站 ( SN, Signal NodeB )、 Smallcell基站及系统。 背景技术
在移动通信系统( UMTS, Universal Mobile Telecommunications System ) 无线接入系统中， 包含无线网络控制器（ RNC， Radio Network Controller ) 和基站（NodeB ) 两种关键网元， 在普遍的建网模式中， 主要覆盖方式是： RNC加上多扇区的一体化宏基站， 或 RNC加上分布式基站基带处理单元 ( BBU, Building Base band Unit ) +宏射频拉远单元 （ RRU, Radio Remote Unit ), 另外有少许的微基站补盲或热点覆盖， 从全网覆盖来看， 大多是宏 小区加上少许的微小区的覆盖方式。
随着移动宽带业务的迅猛发展， 各种 3GPP制式智能终端， 如手机、 数 据卡、 iPad等的数据业务井喷式应用， 直接导致热点地区 （包括室外室内 各种场景）数据流量呈现爆炸式增长趋势， 若仅仅增强传统的宏小区性能 已很难完全解决问题， 需要在原传统的宏站网络基础上提供新的网络解决 方案。
目前移动通信行业大多采用 Smallcell基站来解决急速增长的数据流量 需求。
在目前 Iub 行业内， Smallcell 主要有以下三种形式： 微蜂窝微蜂窝 ( Microcell ) ( 2x5w~2xl0w )、 宏蜂窝 （ Metro cell ) (2xlw ) 以及微微小区 ( Picocell ) ( 2x250mw )。
这些 Smallcell规格可能应用在室外热点或热区覆盖、 室内热点或深度 热区覆盖， 其数量很多， 是目前宏站数量的几倍甚至十几倍， 尤其是 Metrocell和 Picocell数量会非常多。 如果大规模部署 Smallcell而依然釆用 传统的小基站形态来部署， 则会导致以下问题：
1 )对于较多个 Smallcell部署， 多个 Smallcell都要与 RNC建立连接， 传输的获取比较麻烦， 同时在网络部署中需要工程人员在 RNC侧进行配置 多个 Smallcell连接， 网络部署和扩容都比较麻烦。 这样导致每次扩展一热 点都需要在 RNC侧进行配置；
2 )多个 Smallcell部署时，很容易导致需要 RNC扩容。 首先 RNC连接 的基站数量有限， 这样大量 Smallcell部署会导致大量扩容 RNC， 机房站点 空间也增加， 带来资金成本（CAPEX, CAPital Expenditure )和运营成本 ( OPEX, OPerating Expense ) 的急剧增加；
3 ) RNC连接的小区数也有限， 利用率较低， 大量的 Smallcell应用导 致 RNC的配置急速扩容， 因为一般对一个 RNC的容量来讲， 小区数的容 量是重要瓶頭，一个 SmallCell基站的一个小区虽然容量比较小，但是 RNC 还需要像对待宏小区一样分配一个小区的资源及处理能力。 例如一个 4载 波 3 扇区平均每个小区需要有 64~96 个高速上行行链路分组接入技术 ( HSPA, High Speed Uplink Packet Access ) +用户， 每个扇区总共要处理 256-384 ( =4*64-4*96 ) HSPA+用户。 但是一个 SmallCell基站每个小区只 需要支持 16~32个 HSPA+用户，对比宏小区与 SmallCell要求处理的用户数 容量来看， 宏小区容量是 、区容量的 2 - 6倍；
) Smallcell之间的移动性都会导致大量 Iub接口的软切换信令产生； 5 ) Smallcell与 Macrocell由于在逻辑连接上连接到不同的 RNC上， 导 致终端 UE在 Smallcell与 Macrocell之间的发生软件切换成为跨 RNC的 Iur 软切换， 信令交互多， 切换时延长， 切换掉话率高， 资源消耗大。 发明内容
有鉴于此， 本发明实施例的主要目的在于提供一种基于多个 Smallcell 基站进行小区合并的方法、 SN、 Smallcell基站及系统， 旨在避免大量的 Smallcell基站应用导致 RNC扩容，避免大量 Smallcell小区之间的软切换以 及宏微小区之间的跨 RNC Iur软切换发生， 提高用户体验。
为了达到上述目的， 本发明实施例提出一种基于多个 Smallcell基站进 行小区合并的方法， 包括： SN在接收到 RNC的小区建立请求后， 基于多 个 Smallcell基站合并形成的逻辑基站建立同频逻辑小区；其中，基站的 Iub 接口控制面在 SN中实现；
在所述逻辑基站内， 根据用户设备 ( UE, User Equipment )发起的接入 请求以及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反 馈信息判断 UE所在 Smallcell的位置， 建立所述 SN与对应的 Smallcell基 站之间的无线链路；
基于所述无线链路对所述同频逻辑小区进行数据传输。
进一步地， 所述 SN 在接收到 RNC 的小区建立请求后， 基于多个 Smallcell基站合并形成的逻辑基站建立同频逻辑 'j、区， 包括：
所述 SN 在接收到 RNC 的小区建立请求后， 向逻辑基站内的多个 Smallcell基站发送小区建立请求消息和公共传输信道建立请求消息， 建立 同频逻辑小区及其公共资源。
进一步地， 所述基于无线链路对所述同频逻辑小区进行数据传输， 包 括：
基于对应的无线链路， 所述 SN将来自于同一同频逻辑小区的多个 Smallcell 基站上行专用信道（ DCH， Dedicated CHannel )、 增强专用信道 ( E-DCH, Enhanced Dedicated CHannel )数据帧进行选择性合并后上传给 所述 RNC; 以及将来自于所述 RNC、 传输给同一 UE的下行数据分发至归 属于同一同频逻辑 d、区的多个 Smallcell基站。
进一步地， 所述基于无线链路对所述同频逻辑小区进行资源管理， 包 括：
基于对应的无线链路， 对同一同频逻辑小区下多个 Smallcell基站覆盖 下的终端进行移动性管理；
根据各 Smallcell基站的反馈信息判断 UE在 Smallcell交叠覆盖区域或 非 Smallcell交叠覆盖区域； 并根据判断结果对非 Smallcell交叠覆盖区域高 速专用物理数据信道 ( HS-DPDCH, High Speed-Dedicated Physical Data CHannel )码资源进行复用。
进一步地， 所述方法还包括：
在多个 Smallcell基站之间进行 UE的高速下行分组接入（ HSDPA, High Speed Downlink Packet Access ) 业务切换。
进一步地，所述在多个 Smallcell基站之间进行 UE的 HSDPA业务切换， 包括：
SN接收同一逻辑小区下的多个 Samllcell基站上 4艮的 UE的 UL_DPCCH Pilot信号的信号干 4尤比（SIR, Signal to Interference Ratio )值；
比较各 SIR值， 获取其中最大 SIR值；
若所述最大 SIR值持续预定时间，则判断该最大 SIR值对应的 Smallcell 基站与当前 UE服务的 Smallcell基站是否相同；
若不同， 则在该最大 SIR值对应的 Smallcell基站下调度高速下行共享 信道（HS-PDSCH, High Speed-Physical Downlink Shared CHannel )物理信 道向该 UE发送 HSDPA数据；
若相同， 则继续维持当前的服务 Smallcell基站状态。
进一步地， 所述 SN与多个 Smallcell基站之间至少采用以下连接方式： 星型连接方式、 无线网络网格（Mesh )组网连接方式以及有线以太网因特 网十办议 ( IP, Internet Protocol )连接方式。
进一步地，所述 SN与宏基站分开部署，所述 SN与连接的所有 Smallcell 基站构成一逻辑基站； 或者， 所述 SN集成在宏基站中， 所述宏基站与连接 的所有 Smallcell基站构成一异构逻辑基站；或者，所述 SN集成在 BBU-RRU 分布式基站的 BBU中， 所述 BBU与连接的所有 Smallcell构成一异构逻辑 基站。
本发明实施例还提出一种基于多个 Smallcell基站进行小区合并的 SN, 包括：
公共资源建立模块， 配置为在接收到 RNC的小区建立请求后， 基于多 个 Smallcell基站合并形成的逻辑基站建立同频逻辑小区；其中，基站的 Iub 接口控制面在 SN中实现；
链接建立模块， 配置为在所述逻辑基站内，根据 UE发起的接入请求以 及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息 判断 UE所在 Smallcell的位置， 建立所述 SN与对应的 Smallcell基站之间 的无线链路；
管理操作模块， 配置为基于所述无线链路对所述同频逻辑小区进行数 据传输。
进一步地， 所述公共资源建立模块还配置为在接收到 RNC的小区建立 请求后， 向逻辑基站内的多个 Smallcell基站发送'】、区建立请求消息和公共 传输信道建立请求消息， 建立同频逻辑小区及其公共资源。
进一步地， 所述管理操作模块包括：
选择性合并模块， 配置为基于对应的无线链路， 将来自于同一同频逻 辑小区的多个 Smallcell基站上行 DCH、 E-DCH数据帧进行选择性合并后 上传给所述 RNC; 下行数据分发模块， 配置为将来自于所述 RNC、 传输给同一 UE的下 行数据分发至归属于同一同频逻辑小区的多个 Smallcell基站。
进一步地， 所述管理操作模块还包括：
移动性管理模块， 配置为基于对应的无线链路， 对同一同频逻辑小区 下多个 Smallcell基站覆盖下的终端进行移动性管理；
码道资源管理模块， 配置为根据各 Smallcell基站的反馈信息判断 UE 在 Smallcell交叠覆盖区域或非 Smallcell交叠覆盖区域； 并根据判断结果对 非 Smallcell交叠覆盖区域 HS-DPDCH码资源进行复用。
进一步地， 所述移动性管理模块还配置为在多个 Smallcell基站之间进 行 UE的 HSDPA业务切换。
进一步地， 所述移动性管理模块还配置为接收同一逻辑小区下的多个 Samllcell基站上报的 UE的 UL— DPCCH Pilot信号的 SIR值；比较各 SIR值， 获取其中最大 SIR值；若所述最大 SIR值持续预定时间，则判断该最大 SIR 值对应的 Smallcell基站与当前 UE服务的 Smallcell基站是否相同；若不同， 则在该最大 SIR值对应的 Smallcell基站下调度 HS-PDSCH物理信道向该 UE发送 HSDPA数据；若相同，则继续维持当前的服务 Smallcell基站状态。
进一步地， 所述 SN与多个 Smallcell基站之间至少釆用以下连接方式： 星型连接方式、 Mesh组网连接方式以及有线以太网 IP连接方式。
进一步地，所述 SN与宏基站分开部署，所述 SN与连接的所有 Smallcell 基站构成一逻辑基站； 或者， 所述 SN集成在宏基站中， 所述宏基站与连接 的所有 Smallcell基站构成一异构逻辑基站；或者，所述 SN集成在 BBU-RRU 分布式基站的 BBU中， 所述 BBU与连接的所有 Smallcell构成一异构逻辑 基站。
本发明实施例还提出一种基于多个 Smallcell 基站进行小区合并的 Smallcell基站， 包括： 小区建立模块， 配置为在接收到 SN发送的小区建立请求消息后，基于 多个 Smallcell基站合并形成的逻辑基站建立相应的同频逻辑小区；
链路建立模块， 配置为在所述逻辑基站内，在接收到 SN发起的无线链 路建立请求消息后建立与 SN之间的无线链路。
本发明实施例还提出一种基于多个 Smallcell基站进行小区合并的系 统， 包括： SN及多个 Smallcell基站； 其中，
所述 SN，配置为在接收到 RNC的小区建立请求后，基于多个 Smallcell 基站合并形成的逻辑基站建立同频逻辑小区； 并且在所述逻辑基站内， 根 据 UE发起的接入请求以及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息判断 UE所在 Smallcell的位置， 建立所述 SN与 对应的 Smallcell基站之间的无线链路；
所述 Smallcell基站， 配置为在收到 SN发送的小区建立请求后， 基于 多个 Smallcell基站合并形成的逻辑基站建立相应的同频逻辑小区； 并且在 所述逻辑小区内， 根据 SN发起的无线链路建立请求， 建立所述 SN 与 Smallcell基站之间的无线链路， 其中， lub接口控制面与 lub接口用户面分 离开来， 分别在 SN和 Smallcell基站中实现。
本发明实施例提出的一种基于多个 Smallcell基站进行小区合并的方 法、 SN、 Smallcell基站及系统， 在基站侧对多个 Smallcell基站合并为一个 逻辑基站， 同频的多个 Smallcell合并为一个同频逻辑小区， 该同频逻辑小 区需要预留的 RNC处理资源与传统宏小区需要预留的 RNC处理资源基本 相当， 该解决方案有利于在同一宏小区下部署开通多个 Smallcell基站或者 扩容，还可以避免大量的 Smallcell基站应用导致 RNC扩容，有效避免大量 Smallcell小区之间的软切换以及宏微小区之间的跨 RNC Iur软切换发生， 进而避免了由此带来的用户体验下降， 同时减小 lub传输压力以及 Iur传输 压力； 此外本发明实施例在把多个小区合并为一个同频逻辑小区的同时， 还实现同一同频逻辑小区下对 UE所属的 Smallcell基站覆盖区域的搜索感 知，从而实现了多个 Smallcell基站不同覆盖区的 HS-PDSCH码道资源的复 用， 提升了整个同频逻辑小区的吞吐量。 附图说明
图 1是本发明实施例基于多个 Smallcell基站进行小区合并的方法一实 施例的流程示意图；
图 2-1是 Iub接口控制面及用户面与 SN与 Smallcell之间的分配关系； 图 2-2是本发明实施例基于多个 Smallcell基站进行小区合并的方法一 实施例中 Smallcell解决方案中 SN的第一种部署形式；
图 2-3是本发明实施例基于多个 Smallcell基站进行小区合并的方法一 实施例中 Smallcell解决方案中 SN的笫二种部署形式；
图 2-4是本发明实施例基于多个 Smallcell基站进行小区合并的方法一 实施例中 Smallcell解决方案中 SN的第三种部署形式；
图 3-1是上述实施例中 SN与多个 Smallcell基站之间的一种星型连接方 式示意图 （微波 IDU集成到 SN中；)；
图 3-2是上述实施例中 SN与多个 Smallcell基站之间的另一种星型连接 方式示意图 （微波 IDU不集成到 SN中）；
图 3-3 是上述实施例中 SN 与多个 Smallcell基站之间的连接采用 Wlan802.11 a/g/n/ac的星型连接方式示意图；
图 3-4 是上述实施例中 SN 与多个 Smallcell基站之间的连接采用 Wlan802.11 a/g/n/ac的 Mesh组网连接方式示意图；
图 3-5是上述实施例中 SN与多个 Smallcell基站之间的连接采用有线以 太网 IP连接方式示意图；
图 4是本发明实施例中 SN的内部功能模块示意图；
图 5是本发明实施例中 HSDPA用户在多个 Smallcell基站（属于同一 逻辑小区） 下的业务连接关系示意图；
图 6a是本发明实施例中 Smallcell基站的内部结构示意图；
图 6b是本发明实施例中 Smallcell基站的定时搜索模块流程参考图； 图 7是本发明一实例中同一个逻辑小区中的 10个 HS-PDSCH码道在两 个 Smallcell基站中的管理分配示意图；
图 8是基于图 5举例说明 2个 Smallcell合并为一个同频逻辑小区情况 下的 HS-PDSCH的码道资源在两个 Smallcell基站中复用和被调度的情况示 意图；
图 9本发明实施例中非 HSDPA用户在多个 Smallcell基站（属于同一 逻辑小区） 下的业务连接关系示意图；
图 10是本发明实施例基于多个 Smallcell基站进行小区合并的方法另一 实施例的流程示意图；
图 11是本发明实施例基于多个 Smallcell基站进行小区合并的方法另一 实施例中在多个 Smallcell基站之间进行 UE的 HSDPA业务切换的流程示意 图；
图 12是本发明实施例基于多个 Smallcell基站进行小区合并的 SN—实 施例的结构示意图；
图 13是本发明实施例基于多个 Smallcell基站进行小区合并的 SN—实 施例中管理操作模块的结构示意图；
图 14是本发明实施例基于多个 Smallcell基站进行小区合并的 Smallcell 基站一实施例的结构示意图；
图 15是本发明实施例基于多个 Smallcell基站进行小区合并的系统一实 施例的结构示意图。 具体实施方式
为了使发明的技术方案更加清楚、 明了， 下面将结合附图作进一步详 述。
本发明实施例的解决方案主要是： 在基站侧对多个 Smallcell基站合并 为一个逻辑基站， 同频的多个 Smallcell合并为一个同频逻辑小区， 该同频 逻辑小区需要预留的 RNC处理资源与传统宏小区需要预留的 RNC处理资 源基本相当，有利于在同一宏小区下部署开通多个 Smallcell基站或者扩容， 避免大量的 Smallcell基站应用导致 RNC扩容， 避免大量 Smallcell小区之 间的软切换以及宏微小区之间的跨 RNC Iur软切换发生，同时减小 Iub传输 压力以及 Iur传输压力； 此外实现同一同频逻辑小区下对 UE 所属的 Smallcell基站覆盖区域的搜索感知， 实现多个 Smallcell基站不同覆盖区的 HS-PDSCH码道资源的复用， 提升整个同频逻辑小区的吞吐量。
具体地， 如图 1所示， 本发明一实施例提出一种基于多个 Smallcell基 站进行小区合并的方法， 包括：
步驟 S 101 , SN在接收到 RNC的小区建立请求后， 基于多个 Smallcell 基站合并形成的逻辑基站建立同频逻辑小区。
其中， 基站的 Iub接口控制面与 Iub接口用户面分离开来， 分别在 SN 和 Smallcell基站中实现。
本发明实施例提出的是在 Smallcell 小功率基站侧， 对多个 SmallCell 基站合并为一个逻辑基站，同频的多个 Smallcell合并为一个同频逻辑小区， 该方法将基站的基带处理与信令处理分离， 参考图 2-1 和图 2-2, 多个 SmallCell基站通过 SN与 RNC连接， 从 RNC侧来看， 多个 Smallcell基站 从属于一个逻辑基站，从 RNC处理资源来看， 多个 Smallcell的同频物理小 区看着是一个同频逻辑小区， 这个逻辑小区需要预留的 RNC处理资源与传 统宏小区需要预留的 RNC处理资源基本相当， 因此该解决方案在工程上非 常有利于在同一宏小区下部署开通多个 Smallcell基站或者扩容。
本实施例把基站的 Iub接口控制面与用户面分离开来（参考图 2-1 ), 分別放在 S 和 Smallcell基站中实现， Iub接口控制面在 SN中实现， Iub 接口用户面在 Smallcell中实现， 另外 Smallcell基站还实现对用户面数据的 基带处理、射频处理， SN与 Smallcell基站的分离体现在 Iub接口的控制面 和用户面的分离， 这样 SN与 Smallcell基站之间的交互接口变成了低速的 接口关系，可以采用传统的微波或低成本的无线局域网络（WLAN, Wireless Local Area Networks )作为 SN与 Smallcell基站之间的传输手段， 因为采用 低成本的传输部署是大量 Smallcell基站快速部署的关键因素之一。 相对于 传统 BBU+RRU架构采用光纤来传输， SN-Smallcell架构可以有效避免实际 网络部署光纤资源不够或者铺设光纤带来的较高的建网成本的问题， 可以 采用低成本的 WLAN或 波传输。
具体地， SN的部署方案可以有以下几种：
如图 2-2所示， 图 2-2是 Smallcell解决方案中 SN的第一种部署形式， 其中， SN与宏基站分开部署， 通过 SN实现了多个同频的物理 Smallcell合 并为一个同频逻辑小区， 另外还实现多个 Smallcell基站的合并，在 RNC侧 来看， 所有的 smallcell都是一个逻辑基站， 便于多个 Smallcell基站的整体 快速部署和扩容。在图 2-2中， Smallcell根据需要可选配置无线保真（Wifi, Wireless Fidelity )功能。
如图 2-3所示， 图 2-3是 Smallcell解决方案中 SN的第二种部署形式， 其中， SN功能集成在某个宏基站功能中， 在 RNC侧来看， 该宏基站与连 接的所有 Smallcell基站都是一个异构逻辑基站。 在图 2-3中， Smallcell根 据需要可选配置 Wifi功能。
如图 2-4所示， 图 2-4是 Smallcell解决方案中 SN的笫三种部署形式， 其中， SN功能集成在某个 BBU-RRU分布式基站的 BBU中， 在 RNC侧来 看， 该 BBU与连接的所有 Smallcell基站都是一个异构逻辑基站。 在图 2-4 中， Smallcell根据需要可选配置 Wifi功能。 在各逻辑基站中， SN与 RNC之间通过 lub接口连接， 与现有技术相 同，其通过 lub控制面模块，实现 lub接口的 NodeB侧的无线网络层（ RNL, Radio Network Layer ) 的 NodeB基站应用部分 ( NBAP, NodeB Application Part )功能， 顺从第三代合作伙伴计划技术规范（3GPP TS， 3rd Generation Partnership Project Technical Specification ) 25.433 R99/R5/R6/R7/R8/R9/R10/ Rll协议。该 lub控制面模块集中处理与该 SN连接的所有 Smallcell基站的 lub控制面信令， 在 RNC侧来看， 与该 SN连接的所有 Smallcell基站都属 于一个逻辑基站。
对于 SN与各 Smallcell基站的连接方式， 具体可以包括但不限于以下 几种：
如图 3-1所示，图 3-1是 SN与多个 Smallcell基站之间的连接采用微波 传输的星型连接方式， 其中数字微波室内单元（IDU, Indoor Unit )集成到 SN中。
如图 3-2所示，图 3-2是 SN与多个 Smallcell基站之间的连接釆用微波 传输的星型连接方式， 其中 IDU不集成到 SN中。
如图 3-3 所示， 图 3-3是 SN与多个 Smallcell基站之间的连接采用 Wlan802.11 a/g/n/ac的星型连接方式。
如图 3-4所示， 图 3-4是 SN与多个 Smallcell基站之间的连接采用 Wlan802.11 a/g/n/ac的 Mesh组网连接方式。
如图 3-5所示，图 3-5是 SN与多个 Smallcell基站之间的连接采用有线 以太网 IP连接方式。
基于上述 SN-Smallcell架构， 对多个 Smallcell基站实现多个小区合并 处理， 首先， 进行公共资源建立， SN收到 RNC的小区建立请求后， 向与 其连接的多个 Smallcell基站发送小区建立请求消息（包含相同的频点资源 和相同的小区扰码 )和公共传输信道建立请求消息， 以此建立同频逻辑小 区， 具体一个同频逻辑小区对应于哪几个 Smallcell基站， 由 SN的本地配 置数据来确定。
步驟 S102,在所述逻辑基站内，根据 UE发起的接入请求以及所述 RNC 发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息判断 UE所 在 Smallcell的位置，建立所述 SN与对应的 Smallcell基站之间的无线链路。
在上述 SN-Smallcell架构中， 若某一个 UE通过某个 Smallcell基站发 起接入请求后，在 RNC接纳允许后会向 SN发起无线链路建立过程， SN收 到无线链路建立请求后， 会向对应的 Smallcell基站发起无线链路建立请求 的消息， 建立起相应的传输信道和物理信道， 该呼叫建立过程在 SN 与 Smallcell基站之间的内部逻辑流程与传统宏站内部基本相同。
后续，各 UE则基于该建立的 Smallcell基站与 SN之间的无线链路进行 数据传输及享受资源服务。
步驟 S103, 基于所述无线链路对所述同频逻辑小区进行数据传输。 参照图 4 , 图 4是本实施例中 SN的内部功能模块示意图。 本实施例在 SN中还设置有选择性合并（SC, Selection Combining )模块、 下行数据分 发模块、 HS-PDSCH码道资源管理模块以及配置为管理同一同频逻辑小区 下的多个 Smallcell 基站覆盖下的终端的移动性管理模块 （ Mobility management模块 )。
其中， 选择性合并模块实现把同一 UE数据上传给多个 Smallcell基站 的上行数据进行选择性合并， 即将来自于同一同频逻辑小区的多个 Smallcell基站上行 DCH、 E-DCH数据帧进行选择性合并后上传给 RNC。
下行数据分发模块实现把自于 RNC、 传输给同一 UE的下行数据都分 发到归属于同一同频逻辑小区的多个 Smallcell基站。
由此， 通过选择性合并模块及下行数据分发模块实现对同频逻辑小区 进行数据传输。 上述移动性管理模块， 配置为对同一同频逻辑小区下多个 Smallcell基 站覆盖下的终端进行移动性管理， 该移动性管理模块的实现是 HS-DPDCH 码资源复用的基础， 只有识别出 UE所在 Smallcell基站覆盖的区域， 才能 实现同一逻辑小区下的不同 Smallcell覆盖区域的 HS-DPDCH码资源复用。
对于同一逻辑小区下的两个或者多个 Smallcell基站重叠区域的 UE,如 果这些 UE是非 HSDPA业务，那么就有两个或者多个 Smallcell基站与主要 重叠区域的 UE都有无线连接， 即对于重叠区域的 UE而言， 就是接收来自 多个 Smallcell小区的无线信号，只是这些无线连接是完全相同的无线连接。
对于同一逻辑小区下的两个或者多个 Smallcell基站重叠区域的 UE,如 果这些 UE是 HSDPA业务，仅仅只有一个 Smallcell基站小区负责调度这些 重叠区的 UE的 HSDPA业务，即属于同一逻辑小区的多个 Smallcell基站重 叠覆盖区的终端 HSDPA业务而言， UE仅仅接收到一个 Smallcell小区的 HSDPA数据流， 参照图 5, 图 5是 HSDPA用户在多个 Smallcell基站（属 于同一逻辑小区）下的业务连接关系示意图。 其中重叠区 （阴影区） 的 UE 仅仅与一个 Smallcell基站有业务连接。
S 通知某同频逻辑小区对应的所有 Smallcell基站当前同频逻辑小区 下的所有用户 UE的 "NodeB Communication Context" , "UL DPCH Uplink Scrambling Code" 和 "UL DPCCH Slot Format" 信息， 相应的 Smallcell基 站的定时搜索模块就会根据这些终端的信息进行搜索， 主要看上行 UL— DPCCH Pilot信号的 SIR值是否符合要求来判断是否搜索到某个终端 UE, 一旦 Smallcell基站搜索到某一个 UE或某几个 UE， Smallcell会反馈 给 SN对应地终端 UE "NodeB Communication Context" , 然后 SN 向该 Smallcell发起建立无线链路过程（复制原来向其他 Smallcell发起的建立无 线链路过程消息）， 该 Smallcell建立起对应的传输信道和物理信道（从 SN 来看， 相当于创建另外一条无线链路）。 某个 Smallcell基站对于该小区下的终端的 UL DPCCH Pilot信号的 SIR 值进行检测，一旦上行 UL_DPCCH Pilot信号的 SIR值不符合要求， Smallcell 基站会反馈给 SN对应地终端 UE "NodeB Communication Context" , 然后 SN向该 Smallcell基站发起删除无线链路过程， 该 Smallcell基站删除对应 的传输信道和物理信道（从 SN来看， 相当于删除一条无线链路）。
上述码道资源管理模块， 配置为根据各 Smallcell基站的反馈信息判断 UE是否在 Smallcell交叠覆盖区域； 并根据判断结果对非 Smallcell交叠覆 盖区域 HS-DPDCH码资源进行复用。
具体地， SN 管理同一同频逻辑小区下的 Smallcell 基站重叠区域 HS-PDSCH码资源， 并即时通知给该同频逻辑小区相映射的所有 Smallcell 基站。
S 通过各个 Smallcell基站反馈的情况知道 UE是在 Smallcell基站交 覆盖区域还是在非 Smallcell基站交叠覆盖区域。 对于一个 HSDPA小区而 言， 其下行码资源受限（一般最大 15个 HS-DPDCH码资源；)， 由于本发明 实施例是把多个 Smallcell基站实现了小区合并， 多个同频物理小区映射到 一个逻辑小区， 为了最大限度提升每个 Smallcell基站覆盖下的用户下行数 据体验， 本实施例提出一种 HS-DPDCH码资源复用的管理解决方案， 对于 同一个同频逻辑小区而言， 需要管理的 HS-DPDCH码资源包括两类资源： Smallcell重叠区域 HS-PDSCH码资源和各 Smellcell非重叠区域 HS-PDSCH 码资源， 其中可以复用 Smellcell非重叠区域 HS-PDSCH码资源。
参照图 6a, 图 6a是本实施例中 Smallcell基站的内部结构示意图， 本 实施例中所有 Smallcell 基站包括一个定时搜索终端的定时搜索模块 ( UL— DPCCH Scrambling code scan&Pilot SIR Evaluation ) 以及高精度时钟 同步模块 ( High-Accuracy Time synchronization )， 其中：
对于定时搜索模块， 所有 Smallcell基站不仅要搜索本 Smallcell基站覆 盖下的终端 UE,还要搜索不属于本 Smallcell基站覆盖但属于同一逻辑小区 下的终端 UE， 搜索的目的是及时判断属于同一小区下的终端 UE是否进入 到本 Smallcell基站覆盖范围。 对于 UE同时归属于两个或以上的 smallcell 基站覆盖的区域标记为 "Smallcell 重叠区域"， 对于 UE仅仅属于 1 个 Smallcell基站覆盖的区域标记为 "Smallcell非重叠区域"， 定时搜索模块流 程参考图 6b。
对于高精度时钟同步模块， 由于本发明实施例要实现多个 Smallcell小 区合并， 由于在同一同频逻辑小区下的多个 Smallcell基站的物理层基带处 理是分离的， 为了避免多个 Smallcell基站对用户的干扰， 同一同频逻辑 'J、 区下的多个 Smallcell基站的之间的时钟必须高度同步。 因此， 本发明实施 例要求配置高精度时钟同步模块， 该时钟同步模块是保证同一同频逻辑小 区下所有的 Smallcell基站时钟同步发射信号， 不同的 Smallcell基站的发射 时间相差小于 l/4Chip ( l/4*l/3.8M=65ns ), 参考 3GPP TS 25.1046.8.4 Time alignment error in Tx Diversity中对发射分集的时间差的要求。
以下详细阐迷本实施例同一同频逻辑小区的 HS-PDSCH码道资源复用 过程：
Smallcell基站对于所属的 UE上下行数据进行处理， 对于 R99业务， 所用下行码字资源依然由 RNC指定。
对于 HSDPA 业务而言， 在共享物理信道 HS-PDSCH码道调度上对 "Smallcell重叠区域的 UE" 和 "Smallcell非重叠区域的 UE" 要求区别对 待。 对于 "Smallcell重叠区域的 UE" , 使用重叠区 HS-PDSCH码道资源； 对于所有 "Smallcell非重叠区域的 UE" , 使用的 HS-PDSCH码道资源为 RNC分配给同频逻辑小区的 HS-DPDCH码道资源数量，从而可以实现每个 Smallcell基站的非重叠区 UE可以复用相同的 HS-PDSCH码道资源。
为了说明多个 Smallcell合并为一个同频逻辑小区情况下的 HS PDSCH 码道资源复用， 下面结合图 4、 图 5、 图 7和图 8进行举例说明。
图 4是本实施例中 SN的内部功能模块示意图； 图 5是 HSDPA用户在 多个 Smallcell基站 （属于同一逻辑小区）下的业务连接关系示意图； 图 7 是同一个逻辑小区中的 10个 HS-PDSCH码道在两个 Smallcell基站中的管 理分配示意图； 图 8是基于图 5举例说明 2个 Smallcell合并为一个同频逻 辑小区情况下的 HS-PDSCH的码道资源在两个 Smallcell基站中复用和被调 度的情况示意图。
图 5中显示 Smallcelll与 Smallcell2是两个相邻的 smallcell基站，附图 4中 SN中所包含的码道资源管理模块" 来分配 Smallcelll和 Smallcell2所 调度的 HS-PDSCH码道资源， 这两个 Smllcell基站的同频小区合并为一个 逻辑小区， 其中 Smallcelll基站是 UE1、 UE2、 UE5 、 UE7的 HS-DSCH 服务物理小区， Smallcell2基站是 UE3、 UE4、 UE6、 UE8的 HS-DSCH服 务物理小区， UE2和 UE3在 Smallcelll与 Smallcell2的覆盖重叠区范围内。 UE2与 UE3的调度使用的 HS-PDSCH码道资源不能相同， 这需要在 SN确 定某 UE为重叠区的情况下， SN即时通知该同频逻辑 d、区下的所有 Smallcell 基站对于重叠区 HSDPA用户需要配置不同的 HS-PDSCH码道资源 （需要 指明不同的码道及码道数）。
UE2和 UE3都是重叠区的 HSDPA用户， Smallcelll与 Smallcell2分别 是 UE2和 UE3的 HS-DSCH服务物理小区， 但属于同一个同频逻辑小区， 所以为了下行区分开来重叠区的不同的用户， UE2和 UE3的 HS-PDSH码 道资料不能相同， Smllcelll为重叠区的用户配置的 HS-PDSCH码道为码道 1和码道 2, Smllcell2为重叠区的用户配置的 HS-PDSCH码道为码道 3和 码道 4, 这一功能由图 4的码道资源管理模块完成。
UE1、 UE5和 UE7是在 Smallcelll的非重叠覆盖区的 HSDPA用户， UE4、 UE6和 UE8是在 Smallcell2的非重叠覆盖区的 HSDPA用户， 由于 Smallcelll的非重叠覆盖区与 Smallcell2的非覆盖区不重叠， 那么就具备实 现 HS-PDSCH码道资源的复用的可性行。例如 RNC为该同频逻辑小区配置 的 10个 HS-PDSCH码道资源 （1 ~ 10号码道）， 从图 7 和图 8 来看， Smallcell#l 中 1、 2码道在重叠区和非重叠区是釆用时分复用方式进行调 度 ， Smallcell#2中 3、 4码道在重叠区和非重叠区是采用时分复用方式进 行调度。 10个 HS-PDSCH码道在 2个 Smallcell合并为一个小区内可使用 HS-PDSCH码道数： 2+6+2+6=16 ( Smallcelll 码道 1、 2和码道 5 ~ 10, Smallcell2码道 3、 和码道 5 ~ 10 ), 当重叠区没有用户时， SN通知所有 Smallcell基站可以复用分配逻辑小区的所有 HS-PDSCH码道。
为了实现 Smallcell调度该覆盖区下的 HSDPA用户， 需要为相同逻辑 小区的多个 Smallcell需要配置不同的 HS-SCCH控制信道， 例如 Smallcelll 配置 3个 HS-SCCH信道， Smallcell2也配置另外 3 个 HS-SCCH, 两个 Smallcell的 HS-SCCH码道不相同， 参考图 8。
此夕卜， 对于非 HSDPA用户同一同频逻辑小区的多个 Smallcell基站覆 盖下的终端的移动性管理， 其实现基于 SN的移动性管理模块和 Smallcell 基站的定时搜索模块配合来完成， 具体过程实现如下：
S 通知某同频逻辑小区对应的所有 Smallcell基站当前同频逻辑小区 下的所有用户 UE的 "NodeB Communication Context"、 "UL DPCH Uplink Scrambling Code" 和 "UL DPCCH Slot Format" 信息， 相应的 Smallcell基 站的定时搜索模块就会根据这些终端的信息进行搜索， 参考图 5, 主要看上 行 UL_DPCCH Pilot信号的 SIR值是否大于预设置门限（覆盖门限）来判断 是否搜索到某个终端 UE, —旦 Smallcell基站搜索到某一个 UE或某几个 UE , Smallcell 会反馈给 SN 对应的终端 UE "NodeB Communication Context"。
然后 SN向该 Smallcell基站发起建立无线链路过程（复制原来向其他 Smallcell基站发起的建立无线链路过程消息）， 该 SmallCell基站建立起来 对应的传输信道和物理信道（从 SN来看，相当于创建另外一条无线链路）， 参照图 9,图 9是非 HSDPA用户在多个 Smallcell基站（属于同一逻辑小区） 下的业务连接关系示意图，其中 UE2同时接收多个 Smallcell基站的下行信 号 （相同的下行信号）； UE1与 UE3分别接收 Smallcelll基站和 Smallcell2 基站的下行信号。
某个 SmallCell基站对于该小区下的终端的 UL DPCCH Pilot信号的 SIR 值进行检测，一旦上行 UL— DPCCH Pilot信号的 SIR低于预设置门限（覆盖 门限）， Smallcell基站会反馈给 SN对应的终端 UE "NodeB Communication Context" ,然后 SN向该 Smallcell基站发起删除无线链路过程，该 SmallCell 基站删除对应的传输信道和物理信道（从 SN来看，相当于删除一条无线链 路）。
对于重叠区的非 HSDPA 用户而言， 上行业务可以通过两个不同 Smallcell基站传送到 SN， SN中的选择性合并模块针对来自于归属于同一 逻辑小区的多个 SmallCell基站上行 DCH、 E-DCH数据帧进行选择性合并 处理， 然后上传给 RNC。 下行业务通过 SN的下行数据分发模块进行复制 发送给与该 UE所属覆盖的 Smallcell基站， 参照图 4。
本实施例通过上述方案， 实现了在同一宏小区下部署开通多个 Smallcell基站或者扩容，避免大量的 Smallcell基站应用导致 RNC扩容， 以 及有效避免大量 Smallcell 小区之间的软切换以及宏微小区之间的跨 RNC Iur软切换发生， 进而避免了由此带来的用户体验下降， 同时减小 Iub传输 压力以及 Iur传输压力；此外本发明实施例在把多个小区合并为一个同频逻 辑小区的同时， 还实现同一同频逻辑小区下对 UE所属的 Smallcell基站覆 盖区域的搜索感知， 从而实现了多个 Smallcell 基站不同覆盖区的 HS-PDSCH码道资源的复用， 提升了整个同频逻辑 'j、区的呑吐量。 如图 10所示，本发明另一实施例提出一种基于多个 Smallcell基站进行 小区合并的方法，在上述实施例的基 上，在上述步驟 S103之后，还包括： 步驟 S 104 , 在多个 Smallcell基站之间进行 UE的 HSDPA业务切换。 本实施例与上述实施例的区别在于， 本实施例还可以通过移动性管理 模块实现终端 HSDPA服务 Smallcell服务基站变更过程 (类似于 HSDPA同 频小区间的服务小区变更过程）， 该功能实现基于 SN的移动性管理模块以 及 Smallcell基站的定时搜索模块配合来完成。
具体地， 如图 11所示， 所述步骤 S 104， 在多个 Smallcell基站之间进 行 UE的 HSDPA业务切换的步骤包括：
步骤 S1041 , S 接收同一逻辑小区下的多个 Samllcell基站上报的 UE 的 UL_DPCCH Pilot信号的 SIR值。
步骤 SI 042, 比较各 SIR值， 获取其中最大 SIR值。
步驟 S1043, 若所述最大 SIR值持续预定时间， 则判断该最大 SIR值 对应的 Smallcell基站与当前 UE服务的 Smallcell基站是否相同。
步 S1044, 若不同， 则在该最大 SIR值对应的 Smallcell基站下调度 的 HS-PDSCH物理信道向该 UE发送 HSDPA数据。
步骤 S1045, 若相同， 则继续维持当前的服务 Smallcell基站状态。 更为具体地， 为了实现终端在多个 Smallcell基站之间 HSDPA业务切 换， 对于同一同频逻辑小区下的两个或者多个 Smallcell重叠区域下的 UE 而言， 由 SN 根据同一同频逻辑小区下的多个 Samllcell 基站上报的 UL— DPCCH Pilot信号的 SIR值比较来确定在哪个 Smallcell基站上可以调度 HS-PDSCH物理信道为该 UE所用。 如果来自某个 Smallcell基站上报的某 个 UE的 UL_DPCCH Pilot信号的 SIR值最大， 并且持续一段时间（该时间 参数可配置），并且该 Smallcell基站与当前该 UE服务的 Smallcell基站不相 同， 那么 SN就可以决定在该 Smallcell基站下调度的 HS-PDSCH物理信道 向该终端 UE发送 HSDPA数据， 同一同频逻辑小区下的其他的 Smallcell 基站则不能调度 HS-PDSCH物理信道为该 UE服务， 如果该 Smallcell基站 与当前该 UE服务的 Smallcell基站相同，那么继续维持当前的服务 Smallcell 基站状态。
相比现有技术， 本实施例具有如下优势：
1 ) 多个 Smallcell基站可以统一集中进行部署， 不需要在 RNC侧为每 个 Smallcell基站建立传输连接， 仅仅需要在基站侧的内部自动实现传输连 接， 最大限度地减少热点扩容对 RNC配置工作量； 非常有利于在工程实施 中在同一宏小区下部署开通多个 Smallcell基站或者扩容 Smallcell基站热 点；
2 )大大节省 RNC数量（降低了 RNC的基站数量和小区数量的需求）， 避免了大量 Smallcell部署对 RNC的急速扩容；
3 )避免大量 Smallcell小区之间的 Iub接口软切换信令以及 Smallcell 与 MacroCell之间的大量跨 RNC的 Iur软切换发生导致的用户体验下降， 同时减小 Iub传输压力以及 Iur传输压力；
4 ) 实现了同一逻辑小区的 HS-PDSCH码道资源在多个 Smallcell中空 分复用， 提升了热点片区的逻辑小区的下行吞吐量。
需要说明的是， 本发明实施例 SN还涉及其他处理模块， 具体包括 Iub 接口用户面处理、 MAC-hs/MAC-e、 上行的 RAKE多径解调和符号级处理、 下行符号级处理和扩频调制处理、 收发信机处理、 功放和双工滤波等模块。 本发明实施例在 WCDMA无线制式下基于 SN-Smallcell架构下实现码复用， 室内室外均可使用。
如图 12所示，本发明一实施例提出一种基于多个 Smallcell基站进行' J、 区合并的 SN， 包括： 公共资源建立模块 201、 链接建立模块 202以及管理 操作模块 203, 其中， 公共资源建立模块 201 , 配置为在接收到 RNC的小区建立请求后， 基 于多个 Smallcell基站合并形成的 £辑基站建立同频逻辑小区；
其中， 基站的 Iub接口控制面与 Iub接口用户面分离开来， 分别在 SN 和 Smallcell基站中实现。
链接建立模块 202, 配置为在所述逻辑基站内， 根据 UE发起的接入请 求以及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反馈 信息判断 UE所在 Smallcell的位置， 建立所述 SN与对应的 Smallcell基站 之间的无线链路；
管理操作模块 203，配置为基于所述无线链路对所述同频逻辑小区进行 数据传输。
具体地， 如图 13所示， 所述管理操作模块 203包括： 选择性合并模块 2031、 下行数据分发模块 2032、移动性管理模块 2033以及码道资源管理模 块 2034, 其中，
选择性合并模块 2031 , 配置为基于对应的无线链路， 将来自于同一同 频逻辑小区的多个 Smallcell基站上行 DCH、 E-DCH数据帧进行选择性合 并后上传给所述 RNC;
下行数据分发模块 2032， 配置为将来自于所述 RNC、 传输给同一 UE 的下行数据分发至归属于同一同频逻辑 d、区的多个 Smallcell基站。
移动性管理模块 2033, 配置为基于对应的无线链路， 对同一同频逻辑 小区下多个 Smallcell基站覆盖下的终端进行移动性管理；
码道资源管理模块 2034, 配置为根据各 Smallcell基站的反馈信息判断 UE是否在 Smallcell交叠覆盖区域； 并根据判断结果对 Smallcell交叠覆盖 区域 HS-DPDCH码资源进行复用。
其中， 所述 SN中的公共资源建立模块 201、 链接建立模块 202以及管 理操作模块 203及其子模块在实际应用中，可由 SN中的中央处理器（ CPU, Central Processing Unit )、或数字信号处理器 ( DSP, Digital Signal Processor )、 或可编程逻辑阵列 （FPGA， Field - Programmable Gate Array ) 实现。
更为具体地， 本发明实施例提出的是在 Smallcell小功率基站侧， 对多 个 SmallCell基站合并为一个逻辑基站，同频的多个 Smallcell合并为一个同 频逻辑小区， 该方法将基站的基带处理与信令处理分离， 参考图 2-1 和图 2-2, 多个 SmallCell基站通过 SN ( Signal NodeB ) 与 RNC连接， 从 RNC 侧来看， 多个 Smallcell基站从属于一个逻辑基站， 从 RNC处理资源来看， 多个 Smallcell的同频物理小区看着是一个同频逻辑小区， 这个逻辑小区需 要预留的 RNC处理资源与传统宏小区需要预留的 RNC处理资源基本相当， 因此该解决方案在工程上非常有利于在同一宏小区下部署开通多个 Smallcell基站或者扩容。
本实施例把基站的 Iub接口控制面与用户面分离开来（参考图 2-1 ), 分別放在 S 和 Smallcell基站中实现， Iub接口控制面在 SN中实现， Iub 接口用户面在 Smallcell中实现， 另外 Smallcell基站还实现对用户面数据的 基带处理、射频处理， SN与 Smallcell基站的分离体现在 Iub接口的控制面 和用户面的分离， 这样 SN与 Smallcell基站之间的交互接口变成了低速的 接口关系， 可以釆用传统的微波或低成本的 WLAN作为 SN与 Smallcell基 站之间的传输手段， 因为采用低成本的传输部署是大量 Smallcell基站快速 部署的关键因素之一。 相对于传统 BBU+RRU 架构采用光纤来传输， SN-Smallcell 架构可以有效避免实际网络部署光纤资源不够或者铺设光纤 带来的较高的建网成本的问题， 可以釆用低成本的 WLAN或微波传输。
具体地， SN的部署方案可以有以下几种：
如图 2-2所示， 图 2-2是 Smallcell解决方案中 SN的第一种部署形式， 其中， SN与宏基站分开部署， 通过 SN实现了多个同频的物理 Smallcell合 并为一个同频逻辑小区， 另外还实现多个 Smallcell基站的合并，在 RNC侧 来看， 所有的 smallcell都是一个逻辑基站， 便于多个 Smallcell基站的整体 快速部署和扩容。 在图 2-2中， Smallcell根据需要可选配置 Wifi功能。
如图 2-3所示， 图 2-3是 Smallcell解决方案中 SN的第二种部署形式， 其中， SN功能集成在某个宏基站功能中， 在 RNC侧来看， 该宏基站与连 接的所有 Smallcell基站都是一个异构逻辑基站。 在图 2-3中， Smallcell根 据需要可选配置 Wifi功能。
如图 2-4所示， 图 2-4 Smallcell解决方案中 S 的第三种部署形式， 其中， SN功能集成在某个 BBU-RRU分布式基站的 BBU中， 在 RNC侧来 看， 该 BBU与连接的所有 Smallcell基站都是一个异构逻辑基站。 在图 2-4 中， Smallcell根据需要可选配置 Wifi功能。
在各逻辑基站中， SN与 RNC之间通过 lub接口连接， 与现有技术相 同，其通过 lub控制面模块，实现 lub接口的 NodeB侧的 Radio Network Layer 的 NodeB 应 用 部 分 NBAP 功 能 ， 顺 从 3GPP TS 25.433R99/R5 R6/R7/R8 R9/R10协议。 该 lub控制面模块集中处理与该 SN 连接的所有 Smallcell基站的 lub控制面信令， 在 RNC侧来看， 与该 SN连 接的所有 Smallcell基站都属于一个逻辑基站。
对于 SN与各 Smallcell基站的连接方式， 具体可以包括但不限于以下 几种：
如图 3-1所示，图 3-1是 SN与多个 Smallcell基站之间的连接采用微波 传输的星型连接方式， 其中微波 IDU集成到 SN中。
如图 3-2所示，图 3-2是 SN与多个 Smallcell基站之间的连接釆用微波 传输的星型连接方式， 其中微波 IDU不集成到 SN中。
如图 3-3 所示， 图 3-3是 SN与多个 Smallcell基站之间的连接采用 Wlan802.11 a/g/n/ac的星型连接方式。
如图 3-4所示， 图 3-4是 SN与多个 Smallcell基站之间的连接采用 Wlan802.Ha/g/n/ac的 Mesh组网连接方式。
如图 3-5所示，图 3-5是 SN与多个 Smallcell基站之间的连接采用有线 以太网 IP连接方式。
基于上述 SN-Smallcell架构， 对多个 Smallcell基站实现多个小区合并 处理， 首先， 进行公共资源建立， SN收到 RNC的小区建立请求后， 向与 其连接的多个 Smallcell基站发送小区建立请求消息（包含相同的频点资源 和相同的小区扰码 )和公共传输信道建立请求消息， 以此建立同频逻辑小 区， 具体一个同频逻辑小区对应于哪几个 Smallcell基站， 由 SN的本地配 置数据来确定。
在上述 SN-Smallcell架构中， 若某一个 UE通过某个 Smallcell基站发 起接入请求后，在 RNC接纳允许后会向 SN发起无线链路建立过程， SN收 到无线链路建立请求后， 会向对应的 Smallcell基站发起无线链路建立请求 的消息， 建立起相应的传输信道和物理信道， 该呼叫建立过程在 SN 与 Smallcell基站之间的内部逻辑流程与传统宏站内部基本相同。
后续，各 UE则基于该建立的 Smallcell基站与 SN之间的无线链路进行 数据传输及享受资源服务。
本实施例在 SN中还设置有选择性合并（ SC， Selection Combining )模 块 2031、 下行数据分发模块 2032、 码道资源管理模块 2034以及配置为管 理同一同频逻辑小区下的多个 Smallcell基站覆盖下的终端的移动性管理模 块（ Mobility management模块）2033(可参照图 4中的 SN的内部结构框图）。
其中， 选择性合并模块 2031实现把同一 UE数据上传给多个 Smallcell 基站的上行数据进行选择性合并， 即将来自于同一同频逻辑小区的多个 Smallcell基站上行 DCH、 E-DCH数据帧进行选择性合并后上传给 RNC。
下行数据分发模块 2032实现把自于 RNC,传输给同一 UE的下行数据 都分发到归属于同一同频逻辑小区的多个 Smallcell基站。 由此， 通过选择性合并模块 2031及下行数据分发模块 2032实现对同 频逻辑小区进行数据传输。
上述移动性管理模块 2033 , 配置为对同一同频逻辑小区下多个 Smallcell基站覆盖下的终端进行移动性管理， 该移动性管理模块 2033的实 现是 HS-DPDCH码资源复用的基础， 只有识别出 UE所在 Smallcell基站覆 盖的区域， 才能实现同一逻辑小区下的不同 Smallcell 覆盖区域的 HS-DPDCH码资源复用。
对于同一逻辑小区下的两个或者多个 Smallcell基站重叠区域的 UE,如 果这些 UE是非 HSDPA业务，那么就有两个或者多个 Smallcell基站与主要 重叠区域的 UE都有无线连接， 即对于重叠区域的 UE而言， 就是接收来自 多个 Smallcell小区的无线信号，只是这些无线连接是完全相同的无线连接。
对于同一逻辑小区下的两个或者多个 Smallcell基站重叠区域的 UE,如 果这些 UE是 HSDPA业务，仅仅只有一个 Smallcell基站小区负责调度这些 重叠区的 UE的 HSDPA业务，即属于同一逻辑小区的多个 Smallcell基站重 叠覆盖区的终端 HSDPA业务而言， UE仅仅接受到一个 Smallcell小区的 HSDPA数据流， 参照图 5， 图 5是 HSDPA用户在多个 Smallcell基站（属 于同一逻辑小区）下的业务连接关系示意图。 其中重叠区 （阴影区） 的 UE 仅仅与一个 Smallcell基站有业务连接。
S 通知某同频逻辑小区对应的所有 Smallcell基站当前同频逻辑小区 下的所有用户 UE的 "NodeB Communication Context"、 "UL DPCH Uplink Scrambling Code" 和 "UL DPCCH Slot Format" 信息， 相应的 Smallcell基 站的定时搜索模块就会根据这些终端的信息进行搜索， 主要看上行 UL— DPCCH Pilot信号的 SIR值是否符合要求来判断是否搜索到某个终端 UE, 一旦 Smallcell基站搜索到某一个 UE或某几个 UE， Smallcell会反馈 给 SN对应地终端 UE "NodeB Communication Context" , 然后 SN向该 Smallcell发起建立无线链路过程（复制原来向其他 Smallcell发起的建立无 线链路过程消息）， 该 Smallcell建立起对应的传输信道和物理信道（从 SN 来看， 相当于创建另外一条无线链路）。
某个 Smallcell基站对于该小区下的终端的 UL DPCCH Pilot信号的 SIR 值进行检测，一旦上行 UL_DPCCH Pilot信号的 SIR值不符合要求， Smallcell 基站会反馈给 SN对应地终端 UE "NodeB Communication Context"， 然后 SN向该 Smallcell基站发起删除无线链路过程， 该 Smallcell基站删除对应 的传输信道和物理信道（从 SN来看， 相当于删除一条无线链路）。
上述码道资源管理模块 2034配置为根据各 Smallcell基站的反馈信息判 断 UE是否在 Smallcell交叠覆盖区域； 并根据判断结果对非 Smallcell交叠 覆盖区域 HS-DPDCH码资源进行复用。
具体地， SN 管理同一同频逻辑小区下的 Smallcell 基站重叠区域 HS-PDSCH码资源， 并即时通知给该同频逻辑小区相映射的所有 Smallcell 基站。
S 通过各个 Smallcell基站反馈的情况知道 UE是在 Smallcell基站交 覆盖区域还是在非 Smallcell基站交叠覆盖区域。 对于一个 HSDPA小区而 言， 其下行码资源受限（一般最大 15个 HS-DPDCH码资源；)， 由于本发明 实施例是把多个 Smallcell基站实现了小区合并， 多个同频物理小区映射到 一个逻辑小区， 为了最大限度提升每个 Smallcell基站覆盖下的用户下行数 据体验， 本实施例提出一种 HS-DPDCH码资源复用的管理解决方案， 对于 同一个同频逻辑小区而言， 需要管理的 HS-DPDCH码资源包括两类资源： Smallcell重叠区域 HS-PDSCH码资源和各 Smellcell非重叠区域 HS-PDSCH 码资源， 其中可以复用 Smellcell非重叠区域 HS-PDSCH码资源。
上述 SN中的选择性合并模块 2031、 下行数据分发模块 2032、 码道资 源管理模块 2034以及移动性管理模块 2033在实际应用中， 可由 SN中的 CPU. 或 DSP、 或 FPGA实现。
参照图 6a， 图 6a是本实施例中 Smallcell基站的内部结构示意图， 本 实施例中所有 Smallcell基站包括一个定时搜索终端的定时搜索模块以及高 精度时钟同步模块， 其中，
对于定时搜索模块， 所有 Smallcell基站不仅要搜索本 Smallcell基站覆 盖下的终端 UE，还要搜索不属于本 Smallcell基站覆盖但属于同一逻辑小区 下的终端 UE， 搜索的目的是及时判断属于同一小区下的终端 UE是否进入 到本 Smallcell基站覆盖范围。 对于 UE同时归属于两个或以上的 smallcell 基站覆盖的区域标记为 "Smallcell 重叠区域"， 对于 UE仅仅属于 1 个 smallcell基站覆盖的区域标记为 "Smallcell非重叠区域"。 定时搜索模块流 程参考图 6b。
对于高精度时钟同步模块， 由于本发明实施例要实现多个 Smallcell小 区合并， 由于在同一同频逻辑小区下的多个 Smallcell基站的物理层基带处 理是分离的， 为了避免多个 Smallcell基站对用户的干扰， 同一同频逻辑 'J、 区下的多个 Smallcell基站的之间的时钟必须高度同步。 因此， 本发明实施 例要求配置高精度时钟同步模块， 该时钟同步模块是保证同一同频逻辑小 区下所有的 Smallcell基站时钟同步发射信号， 不同的 Smallcell基站的发射 时间相差小于 l/4Chip ( l/4*l/3.8M=65ns )， 参考 3GPP TS 25.104 6.8.4 Time alignment error in Tx Diversity中对发射分集的时间差的要求。
以下详细阐迷本实施例同一同频逻辑小区的 HS-PDSCH码道资源复用 过程：
Smallcell基站对于所属的 UE上下行数据进行处理， 对于 R99业务， 所用下行码字资源依然由 RNC指定。
对于 HSDPA 业务而言， 在共享物理信道 HS-PDSCH码道调度上对 "Smallcell重叠区域的 UE" 和 "Smallcell非重叠区域的 UE" 要求区别对 待。 对于 "Smallcell重叠区域的 UE" , 使用重叠区 HS-PDSCH码道资源； 对于所有 "Smallcell非重叠区域的 UE"， 使用的 HS-PDSCH码道资源为 RNC分配给同频逻辑小区的 HS-DPDCH码道资源数量，从而可以实现每个 Smallcell基站的非重叠区 UE可以复用相同的 HS-PDSCH码道资源。
为了说明多个 Smallcell合并为一个同频逻辑小区情况下的 HS PDSCH 码道资源复用， 下面结合图 4、 图 5、 图 7和图 8进行举例说明。
图 4是本实施例中 SN的内部功能模块示意图； 图 5是 HSDPA用户在 多个 Smallcell基站 （属于同一逻辑小区）下的业务连接关系示意图； 图 7 是同一个逻辑小区中的 10个 HS-PDSCH码道在两个 Smallcell基站中的管 理分配示意图； 图 8是基于图 5举例说明 2个 Smallcell合并为一个同频逻 辑小区情况下的 HS-PDSCH的码道资源在两个 Smallcell基站中复用和被调 度的情况示意图。
图 5中显示 Smallcelll与 Smallcell2是两个相邻的 smallcell基站，附图 4中 SN中所包含的码道资源管理模块 2034"来分配 Smallcelll和 Smallcell2 所调度的 HS-PDSCH码道资源， 这两个 Smllcell基站的同频小区合并为一 个逻辑小区， 其中 Smallcelll基站是 UE1、 UE2、 UE5 、 UE7的 HS-DSCH 服务物理小区， Smallcell2基站是 UE3、 UE4、 UE6、 UE8的 HS-DSCH服 务物理小区， UE2和 UE3在 Smallcelll与 Smallcell2的覆盖重叠区范围内。 UE2与 UE3的调度使用的 HS-PDSCH码道资源不能相同， 这需要在 SN确 定某 UE为重叠区的情况下， SN即时通知该同频逻辑'】、区下的所有 Smallcell 基站对于重叠区 HSDPA用户需要配置不同的 HS-PDSCH码道资源 （需要 指明不同的码道及码道数）。
UE2和 UE3都是重叠区的 HSDPA用户， Smallcelll与 Smallcell2分别 是 UE2和 UE3的 HS-DSCH服务物理小区， 但属于同一个同频逻辑小区， 所以为了下行区分开来重叠区的不同的用户， UE2和 UE3的 HS-PDSH码 道资料不能相同， Smllcelll为重叠区的用户配置的 HS-PDSCH码道为码道 1和码道 2， Smllcell2为重叠区的用户配置的 HS-PDSCH码道为码道 3和 码道 4, 这一功能由图 4的码道资源管理模块 2034完成。
UE1、 UE5和 UE7是在 Smallcelll的非重叠覆盖区的 HSDPA用户， UE4、 UE6和 UE8是在 Smallcell2的非重叠覆盖区的 HSDPA用户， 由于 Smallcelll的非重叠覆盖区与 Smallcell2的非覆盖区不重叠， 那么就具备实 现 HS-PDSCH码道资源的复用的可性行。例如 RNC为该同频逻辑小区配置 的 10个 HS-PDSCH码道资源 （1 ~ 10号码道）， 从图 7 和图 8 来看， Smallcell#l 中 1、 2码道在重叠区和非重叠区是釆用时分复用方式进行调 度 ， Smallcell#2中 3、 4码道在重叠区和非重叠区是采用时分复用方式进 行调度。 10个 HS-PDSCH码道在 1个 Smallcell合并为一个小区内可使用 HS-PDSCH码道数： 2+6+2+6=16 ( Smallcelll 码道 1、 2和码道 5 ~ 10, Smallcell2码道 3、 和码道 5 ~ 10 ), 当重叠区没有用户时， SN通知所有 Smallcell基站可以复用分配逻辑小区的所有 HS-PDSCH码道。
为了实现 Smallcell调度该覆盖区下的 HSDPA用户， 需要为相同逻辑 小区的多个 Smallcell需要配置不同的 HS-SCCH控制信道， 例如 Smallcelll 配置 3个 HS-SCCH信道， Smallcell2也配置另外 3 个 HS-SCCH, 两个 Smallcell的 HS-SCCH码道不相同， 参考图 8。
此夕卜， 对于非 HSDPA用户同一同频逻辑小区的多个 Smallcell基站覆 盖下的终端的移动性管理， 其实现基于 SN 的移动性管理模块 2033 和 Smallcell基站的定时搜索模块配合来完成， 具体过程实现如下：
S 通知某同频逻辑小区对应的所有 Smallcell基站当前同频逻辑小区 下的所有用户 UE的 "NodeB Communication Context"、 "UL DPCH Uplink Scrambling Code" 和 "UL DPCCH Slot Format" 信息， 相应的 Smallcell基 站的定时搜索模块就会根据这些终端的信息进行搜索， 参考图 5, 主要看上 行 UL_DPCCH Pilot信号的 SIR值是否大于预设置门限（覆盖门限）来判断 是否搜索到某个终端 UE, —旦 Smallcell基站搜索到某一个 UE或某几个 UE , Smallcell 会反馈给 SN 对应的终端 UE "NodeB Communication Context"。
然后 SN向该 Smallcell基站发起建立无线链路过程（复制原来向其他
Smallcell基站发起的建立无线链路过程消息）， 该 SmallCell基站建立起来 对应的传输信道和物理信道（从 SN来看，相当于创建另外一条无线链路）， 参照图 9,图 9是非 HSDPA用户在多个 Smallcell基站（属于同一逻辑小区） 下的业务连接关系示意图，其中 UE2同时接收多个 Smallcell基站的下行信 号 （相同的下行信号）； UE1与 UE3分别接收 Smallcelll基站和 Smallcell2 基站的下行信号。
某个 SmallCell基站对于该小区下的终端的 UL DPCCH Pilot信号的 SIR 值进行检测，一旦上行 UL— DPCCH Pilot信号的 SIR低于预设置门限（覆盖 门限）， Smallcell基站会反馈给 SN对应的终端 UE "NodeB Communication Context" ,然后 SN向该 Smallcell基站发起删除无线链路过程，该 SmallCell 基站删除对应的传输信道和物理信道（从 SN来看，相当于删除一条无线链 路）。
对于重叠区的非 HSDPA 用户而言， 上行业务可以通过两个不同 Smallcell基站传送到 SN, SN中的选择性合并模块 2031针对来自于归属于 同一逻辑小区的多个 SmallCell基站上行 DCH、 E-DCH数据帧进行选择性 合并处理， 然后上传给 RNC。 下行业务通过 SN的下行数据分发模块 2032 进行复制发送给与该 UE所属覆盖的 Smallcell基站， 参照图 4。
进一步地，本实施例还可以通过移动性管理模块 2033实现终端 HSDPA 服务 Smallcell服务基站变更过程（类似于 HSDPA同频小区间的服务小区 变更过程）， 该功能实现基于 SN的移动性管理模块 2033以及 Smallcell基 站的定时搜索模块配合来完成。
具体地， 为了实现终端在多个 Smallcell基站之间 HSDPA业务切换， 对于同一同频逻辑 '』、区下的两个或者多个 Smallcell重叠区域下的 UE而言， 由 SN根据同一同频逻辑小区下的多个 Samllcell基站上报的 UL_DPCCH Pilot信号的 SIR值比较来确定在哪个 Smallcell基站上可以调度 HS-PDSCH 物理信道为该 UE所用。 如果来自某个 Smallcell基站上报的某个 UE 的 UL— DPCCH Pilot信号的 SIR值最大， 并且持续一段时间（该时间参数可设 置；)，并且该 Smallcell基站与当前该 UE服务的 Smallcell基站不相同，那么 SN就可以决定在该 Smallcell基站下调度的 HS-PDSCH物理信道向该终端 UE发送 HSDPA数据， 同一同频逻辑小区下的其他的 Smallcell基站则不能 调度 HS-PDSCH物理信道为该 UE服务， 如果该 Smallcell基站与当前该 UE服务的 Smallcell基站相同， 那么继续维持当前的服务 Smallcell基站状 态。
相比现有技术， 本实施例具有如下优势：
1 ) 多个 Smallcell基站可以统一集中进行部署， 不需要在 RNC侧为每 个 Smallcell基站建立传输连接， 仅仅需要在基站侧的内部自动实现传输连 接， 最大限度地减少热点扩容对 RNC配置工作量； 非常有利于在工程实施 中在同一宏小区下部署开通多个 Smallcell基站或者扩容 Smallcell基站热 点；
2 )大大节省 RNC数量（降低了 RNC的基站数量和小区数量的需求）， 避免了大量 Smallcell部署对 RNC的急速扩容；
3 )避免大量 Smallcell小区之间的 Iub接口软切换信令以及 Smallcell 与 MacroCell之间的大量跨 RNC的 Iur软切换发生导致的用户体验下降， 同时减小 Iub传输压力以及 Iur传输压力；
) 实现了同一逻辑小区的 HS-PDSCH码道资源在多个 Smallcell中空 分复用， 提升了热点片区的逻辑小区的下行吞吐量。
需要说明的是， 本发明实施例 SN还涉及其他处理模块， 具体包括 Iub 接口用户面处理、 MAC-hs/MAC-e、 上行的 RAKE多径解调和符号级处理、 下行符号级处理和扩频调制处理、 收发信机处理、 功放和双工滤波等模块， 在实际应用中， 这些模块可由 SN中的 CPU、 或 DSP、 或 FPGA实现。 本 发明实施例在 WCDMA无线制式下基于 SN-Smallcell架构下实现码复用， 室内室外均可使用。
如图 14所示，本发明较佳实施例提出一种基于多个 Smallcell基站进行 小区合并的 Smallcell基站 , 包括： 小区建立模块 301及链路建立模块 302; 其中：
小区建立模块 301， 配置为在接收到 SN发送的小区建立请求消息后， 基于多个 Smallcell基站合并形成的逻辑基站建立相应的同频逻辑小区； 链路建立模块 302, 配置为在所述逻辑基站内， 在接收到 SN发起的无 线链路建立请求消息后建立与 SN之间的无线链路。 本实施例 Smallcell基 站与 SN之间交互原理请参照上述各实施例， 在此不再赘述。
其中， 所述 Smallcell基站中的小区建立模块 301及链路建立模块 302 在实际应用中， 可由 SN中的 CPU、 或 DSP、 或 FPGA实现。
如图 15所示，本发明较佳实施例提出一种基于多个 Smallcell基站进行 小区合并的系统， 包括： SN401及多个 Smallcell基站 402; 其中：
所述 SN401 , 配置为在接收到 RNC 的小区建立请求后， 基于多个 Smallcell基站 402合并形成的逻辑基站建立同频逻辑小区； 并且在所述逻 辑基站内， 根据 UE发起的接入请求以及所述 RNC发送的无线链路建立请 求或者根据各 Smallcell基站 402的反馈信息判断 UE所在 Smallcell的位置， 建立所述 SN与对应的 Smallcell基站 402之间的无线链路；
所述 Smallcell基站 402,配置为在收到 SN401发送的小区建立请求后， 基于多个 Smallcell基站 402合并形成的逻辑基站建立相应的同频逻辑小区； 并且在所述逻辑小区内， 根据 SN401发起的无线链路建立请求， 建立所述 SN401与 Smallcell基站 402之间的无线链路。
其中， Iub 接口控制面与 Iub 接口用户面分离开来， 分别在 SN 和 Smallcell基站中实现。
本实施例 Smallcell基站与 SN之间交互原理请参照上述各实施例， 在 此不再赘述。
本发明实施例基于多个 Smallcell 基站进行小区合并的方法、 SN、 Smallcell基站及系统，在基站侧对多个 Smallcell基站合并为一个逻辑基站， 同频的多个 Smallcell合并为一个同频逻辑小区， 该同频逻辑小区需要预留 的 RNC处理资源与传统宏 '」、区需要预留的 RNC处理资源基本相当， 该解 决方案有利于在同一宏小区下部署开通多个 Smallcell基站或者扩容， 还可 以避免大量的 Smallcell基站应用导致 RNC扩容， 有效避免大量 Smallcell 小区之间的软切换以及宏微小区之间的跨 RNC Iur软切换发生， 进而避免 了由此带来的用户体验下降， 同时减小 Iub传输压力以及 Iur传输压力； 此 外本发明实施例在 4巴多个小区合并为一个同频逻辑小区的同时， 还实现同 一同频逻辑小区下对 UE所属的 Smallcell基站覆盖区域的搜索感知， 从而 实现了多个 Smallcell基站不同覆盖区的 HS-PDSCH码道资源的复用，提升 了整个同频逻辑小区的吞吐量。
以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用本发明说明书及附图内容所作的等效结构或流程变换， 或直接或 间接运用在其它相关的技术领域， 均同理包括在本发明的专利保护范围内。

Claims

权利要求书
1、 一种基于多个微小区 Smallcell基站进行小区合并的方法， 包括： 信令基站 SN在接收到无线网络控制器 RNC的小区建立请求后， 基于 多个 Smallcell基站合并形成的逻辑基站建立同频逻辑小区； 其中， 基站的 Iub接口控制面在 SN中实现；
在所述逻辑基站内， 根据用户设备 UE发起的接入请求以及所述 RNC 发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息判断 UE所 在 Smallcell的位置，建立所述 SN与对应的 Smallcell基站之间的无线链路； 基于所述无线链路对所述同频逻辑小区进行数据传输。
2、根据权利要求 1所述的方法， 其中， 所述 SN在接收到 RNC的小区 建立请求后， 基于多个 Smallcell基站合并形成的逻辑基站建立同频逻辑小 区， 包括：
所述 SN在接收到 RNC 的小区建立请求后， 向逻辑基站内的多个 Smallcell基站发送 'j、区建立请求消息和公共传输信道建立请求消息， 建立 同频逻辑 d、区及其公共资源。
3、 根据权利要求 1所述的方法， 其中， 所述基于无线链路对所述同频 逻辑小区进行数据传输， 包括：
基于对应的无线链路， 所述 SN将来自于同一同频逻辑小区的多个 Smallcell基站上行专用信道 DCH、 增强专用信道 E-DCH数据帧进行选择 性合并后上传给所迷 RNC; 以及将来自于所述 RNC、 传输给同一 UE的下 行数据分发至归属于同一同频逻辑小区的多个 Smallcell基站。
4、 根据权利要求 1所述的方法， 其中， 所述基于无线链路对所述同频 逻辑小区进行资源管理， 包括：
基于对应的无线链路， 对同一同频逻辑小区下多个 Smallcell基站覆盖 下的终端进行移动性管理； 根据各 Smallcell基站的反馈信息判断 UE在 Smallcell交叠覆盖区域或 非 Smallcell交叠覆盖区域； 并根据判断结果对非 Smallcell交叠覆盖区域高 速专用物理数据信道 HS-DPDCH码资源进行复用。
5、根据权利要求 1所述的方法，其中，所述方法还包括：在多个 Smallcell 基站之间进行 UE的 HSDPA业务切换。
6、根据权利要求 5所述的方法， 其中， 所述在多个 Smallcell基站之间 进行 UE的 HSDPA业务切换， 包括：
SN接收同一逻辑小区下的多个 Samllcell基站上报的 UE的 UL_DPCCH Pilot信号的信号干扰比 SIR值；
比较各 SIR值， 获取其中最大 SIR值；
若所述最大 SIR值持续预定时间，则判断该最大 SIR值对应的 Smallcell 基站与当前 UE服务的 Smallcell基站是否相同；
若不同， 则在该最大 SIR值对应的 Smallcell基站下调度高速下行共享 信道 HS-PDSCH物理信道向该 UE发送 HSDPA数据；
若相同， 则继续维持当前的服务 Smallcell基站状态。
7、 根据权利要求 1-6 中任一项所述的方法， 其中， 所述 SN 与多个 Smallcell基站之间至少釆用以下连接方式： 星型连接方式、 无线网络网格 Mesh组网连接方式以及有线以太网因特网协议 IP连接方式。
8、 根据权利要求 7所述的方法， 其中， 所述 SN与宏基站分开部署， 所述 SN与连接的所有 Smallcell基站构成一逻辑基站； 或者， 所述 SN集成 在宏基站中，所述宏基站与连接的所有 Smallcell基站构成一异构逻辑基站； 或者， 所述 SN集成在基带处理单元 BBU-射频拉远单元 RRU分布式基站 的 BBU中， 所述 BBU与连接的所有 Smallcell构成一异构逻辑基站。
9、 一种基于多个 Smallcell基站进行小区合并的 SN， 包括：
公共资源建立模块， 配置为在接收到 RNC的小区建立请求后， 基于多 个 Smallcell基站合并形成的逻辑基站建立同频逻辑小区；其中，基站的 lub 接口控制面在 SN中实现；
链接建立模块， 配置为在所述逻辑基站内，根据 UE发起的接入请求以 及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息 判断 UE所在 Smallcell的位置， 建立所述 SN与对应的 Smallcell基站之间 的无线链路；
管理操作模块， 配置为基于所述无线链路对所述同频逻辑小区进行数 据传输。
10、 根据权利要求 9所述的 SN, 其中， 所述公共资源建立模块， 还配 置为在接收到 RNC的小区建立请求后，向逻辑基站内的多个 Smallcell基站 发送小区建立请求消息和公共传输信道建立请求消息， 建立同频逻辑小区 及其公共资源。
11、 根据权利要求 9所述的 SN, 其中， 所述管理操作模块包括： 选择性合并模块， 配置为基于对应的无线链路， 将来自于同一同频逻 辑小区的多个 Smallcell基站上行 DCH、 E-DCH数据帧进行选择性合并后 上传给所述 RNC;
下行数据分发模块， 配置为将来自于所述 RNC、 传输给同一 UE的下 行数据分发至归属于同一同频逻辑小区的多个 Smallcell基站。
12、 根据权利要求 11所述的 SN, 其中， 所述管理操作模块还包括： 移动性管理模块， 配置为基于对应的无线链路， 对同一同频逻辑小区 下多个 Smallcell基站覆盖下的终端进行移动性管理；
码道资源管理模块， 配置为根据各 Smallcell基站的反馈信息判断 UE 在 Smallcell交叠覆盖区域或非 Smallcell交叠覆盖区域； 并根据判断结果对 非 Smallcell交叠覆盖区域 HS-DPDCH码资源进行复用。
13、 根据权利要求 12所述的 SN, 其中， 所迷移动性管理模块， 还配 置为在多个 Smallcell基站之间进行 UE的 HSDPA业务切换。
14、 根据权利要求 13所述的 SN， 其中， 所述移动性管理模块， 还配 置为接收同一逻辑小区下的多个 Samllcell基站上报的 UE的 UL— DPCCH Pilot信号的 SIR值； 比较各 SIR值，获取其中最大 SIR值；若所述最大 SIR 值持续预定时间， 则判断该最大 SIR值对应的 Smallcell基站与当前 UE月良 务的 Smallcell基站是否相同； 若不同， 则在该最大 SIR值对应的 Smallcell 基站下调度 HS-PDSCH物理信道向该 UE发送 HSDPA数据；若相同，则继 续维持当前的服务 Smallcell基站状态。
15、 根据权利要求 9-14中任一项所述的 SN, 其中， 所述 SN与多个 Smallcell基站之间至少采用以下连接方式： 星型连接方式、 Mesh组网连接 方式以及有线以太网 IP连接方式。
16、 根据权利要求 15所述的 SN, 其中， 所述 SN与宏基站分开部署， 所述 SN与连接的所有 Smallcell基站构成一逻辑基站； 或者， 所述 SN集成 在宏基站中，所述宏基站与连接的所有 Smallcell基站构成一异构逻辑基站； 或者，所述 SN集成在 BBU-RRU分布式基站的 BBU中， 所述 BBU与连接 的所有 Smallcell构成一异构逻辑基站。
17、一种基于多个 Smallcell基站进行小区合并的 Smallcell基站，包括： 小区建立模块， 配置为在接收到 SN发送的小区建立请求消息后，基于 多个 Smallcell基站合并形成的逻辑基站建立相应的同频逻辑小区；
链路建立模块， 配置为在所述逻辑基站内，在接收到 SN发起的无线链 路建立请求消息后建立与 SN之间的无线链路。
18、 一种基于多个 Smallcell基站进行小区合并的系统， 包括： SN及多 个 Smallcell基站; 其中：
所述 SN，配置为在接收到 RNC的小区建立请求后，基于多个 Smallcell 基站合并形成的逻辑基站建立同频逻辑小区； 并且在所述逻辑基站内， 根 据 UE发起的接入请求以及所述 RNC发送的无线链路建立请求或者根据各 Smallcell基站的反馈信息判断 UE所在 Smallcell的位置， 建立所述 SN与 对应的 Smallcell基站之间的无线链路；
所述 Smallcell基站， 配置为在收到 SN发送的小区建立请求后， 基于 多个 Smallcell基站合并形成的逻辑基站建立相应的同频逻辑小区； 并且在 所述逻辑小区内， 根据 SN发起的无线链路建立请求， 建立所述 SN 与 Smallcell基站之间的无线链路； 其中， Iub接口控制面与 Iub接口用户面分 离开来， 分别在 SN和 Smallcell基站中实现。
PCT/CN2013/082494 2012-11-19 2013-08-28 基于多个Smallcell基站进行小区合并的方法、SN、基站及系统 WO2014075490A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13855240.1A EP2922347B1 (en) 2012-11-19 2013-08-28 Method, sn, base station, and system for cell combination based on multiple smallcell base stations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210468239.2A CN103826229B (zh) 2012-11-19 2012-11-19 基于多个Smallcell基站进行小区合并的方法、SN、基站及系统
CN201210468239.2 2012-11-19

Publications (1)

Publication Number Publication Date
WO2014075490A1 true WO2014075490A1 (zh) 2014-05-22

Family

ID=50730564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/082494 WO2014075490A1 (zh) 2012-11-19 2013-08-28 基于多个Smallcell基站进行小区合并的方法、SN、基站及系统

Country Status (3)

Country Link
EP (1) EP2922347B1 (zh)
CN (1) CN103826229B (zh)
WO (1) WO2014075490A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3116256A1 (en) 2015-07-07 2017-01-11 Vodafone IP Licensing limited Device for controlling network resources
CN112689311A (zh) * 2020-12-17 2021-04-20 维沃移动通信有限公司 小区切换方法、5g射频装置和电子设备
CN114173352A (zh) * 2021-12-01 2022-03-11 中国电信股份有限公司 网络覆盖优化方法、装置、存储介质及电子设备

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3148273B1 (en) 2014-06-30 2018-08-08 Huawei Technologies Co., Ltd. Physical uplink control channel resource allocation method and device
CN105636204A (zh) * 2014-10-27 2016-06-01 中兴通讯股份有限公司 基站管理的实现方法、装置及系统
WO2016082228A1 (zh) * 2014-11-29 2016-06-02 华为技术有限公司 一种调节空口容量密度的方法及装置
CN105827283B (zh) * 2015-01-09 2019-03-12 中国移动通信集团江苏有限公司 一种基于多输入多输出mimo方式通信的方法及装置
CN105992232A (zh) * 2015-03-06 2016-10-05 上海贝尔股份有限公司 一种用于室内无线覆盖的系统、宏基站设备和方法
CN104902576B (zh) * 2015-05-21 2018-08-03 中国联合网络通信集团有限公司 一种逻辑小区中资源分配的方法及装置
CN105578481B (zh) * 2015-12-17 2019-01-18 京信通信系统（中国）有限公司 一种共小区方法、Smallcell及本地控制器
US11349557B2 (en) 2018-11-30 2022-05-31 At&T Intellectual Property I, L.P. System model and architecture for mobile integrated access and backhaul in advanced networks
CN111148133B (zh) * 2019-12-09 2023-02-28 中国联合网络通信集团有限公司 室分系统扩容方法及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394647A (zh) * 2007-09-21 2009-03-25 大唐移动通信设备有限公司 一种实现小区组网的方法及系统
CN101400111A (zh) * 2007-09-26 2009-04-01 大唐移动通信设备有限公司 一种小区通信方法、系统及一种无线网络控制器
WO2012108803A1 (en) * 2011-02-07 2012-08-16 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting secure cell broadcast messages in a cellular communication network
CN102685900A (zh) * 2011-03-18 2012-09-19 中国移动通信集团公司 一种多小区合并中的控制信道资源分配方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103856949B (zh) * 2012-12-07 2019-04-05 中兴通讯股份有限公司 一种对多个小基站进行小区合并的方法、管理方法和系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394647A (zh) * 2007-09-21 2009-03-25 大唐移动通信设备有限公司 一种实现小区组网的方法及系统
CN101400111A (zh) * 2007-09-26 2009-04-01 大唐移动通信设备有限公司 一种小区通信方法、系统及一种无线网络控制器
WO2012108803A1 (en) * 2011-02-07 2012-08-16 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting secure cell broadcast messages in a cellular communication network
CN102685900A (zh) * 2011-03-18 2012-09-19 中国移动通信集团公司 一种多小区合并中的控制信道资源分配方法及装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3116256A1 (en) 2015-07-07 2017-01-11 Vodafone IP Licensing limited Device for controlling network resources
CN112689311A (zh) * 2020-12-17 2021-04-20 维沃移动通信有限公司 小区切换方法、5g射频装置和电子设备
CN112689311B (zh) * 2020-12-17 2023-06-16 维沃移动通信有限公司 小区切换方法、5g射频装置和电子设备
CN114173352A (zh) * 2021-12-01 2022-03-11 中国电信股份有限公司 网络覆盖优化方法、装置、存储介质及电子设备

Also Published As

Publication number Publication date
CN103826229A (zh) 2014-05-28
CN103826229B (zh) 2018-08-14
EP2922347A4 (en) 2016-01-06
EP2922347B1 (en) 2017-06-28
EP2922347A1 (en) 2015-09-23

Similar Documents

Publication Publication Date Title
WO2014075490A1 (zh) 基于多个Smallcell基站进行小区合并的方法、SN、基站及系统
JP6938449B2 (ja) 移動体通信システム、ソース基地局およびターゲット基地局
USRE49020E1 (en) Method and system for dynamic cell configuration
KR101580755B1 (ko) 무선 액세스 네트워크에서의 분산 부하 균형
EP3085193B1 (en) Small cell clusters for signaling load reduction, time synchronization, kpi filtering and spectrum coordination
Soret et al. Multicell cooperation for LTE-advanced heterogeneous network scenarios
JP5976926B2 (ja) Ｔｄｄ異種ネットワークにおける適応ｕｌ−ｄｌ構成
US8588803B2 (en) Method and apparatus for resource scheduling for network controlled D2D communications
Mesodiakaki et al. Energy-efficient user association in cognitive heterogeneous networks
CN104469869A (zh) 一种小小区切换方法和基站
US20140308953A1 (en) Method and apparatus for managing radio resources in multi-carrier and hetnet-integrated mobile access environment
WO2011127855A2 (zh) 通信系统及其管理方法
JP2009527932A (ja) 基地局ノードのリソースを分配する方法、システムおよび装置
Wang et al. Dedicated carrier deployment in heterogeneous networks with inter-site carrier aggregation
WO2014012192A1 (en) Network system with local cluster, central controller, micro base station and macro base station
WO2013189402A2 (zh) 一种对多个小基站进行小区合并的方法、管理方法和系统
CN105208626A (zh) 无线网络的通信方法、接入设备、用户设备
WO2011063684A1 (zh) 一种长期演进系统中调度的方法和装置
WO2012174903A1 (zh) 一种联合传输的方法、系统及锚点网元
JP2016529816A (ja) ダウンリンクパワー調整の通知方法及び装置、ならびにダウンリンクパワー調整の取得方法及び装置
KR20150114442A (ko) 무선 통신 시스템에서 스몰 셀 배치 및 액세스를 제공하는 방법 및 시스템
WO2014161263A1 (zh) 一种宏基站与低功率基站共小区的协同处理方法及系统
WO2010022556A1 (zh) 一种下行信号的分扇区处理方法及基站
Bhosale et al. A Review on Enhanced Inter-cell Interference Coordination in Long Term Evolution Heterogeneous Networks
Bernal A Friendly Introduction to the Requirements and Supporting Technologies for 5G Cellular Networks

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13855240

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2013855240

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2013855240

Country of ref document: EP