WO2012110006A1 - 一种tdd小区为终端提供服务的方法及系统 - Google Patents

一种tdd小区为终端提供服务的方法及系统 Download PDF

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Publication number
WO2012110006A1
WO2012110006A1 PCT/CN2012/071292 CN2012071292W WO2012110006A1 WO 2012110006 A1 WO2012110006 A1 WO 2012110006A1 CN 2012071292 W CN2012071292 W CN 2012071292W WO 2012110006 A1 WO2012110006 A1 WO 2012110006A1
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WIPO (PCT)
Prior art keywords
cell
downlink
uplink
enb
tdd
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PCT/CN2012/071292
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English (en)
French (fr)
Inventor
于晓谦
黄亚达
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
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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 US14/000,175 priority Critical patent/US9949134B2/en
Priority to EP12746806.4A priority patent/EP2667652B1/en
Publication of WO2012110006A1 publication Critical patent/WO2012110006A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters

Definitions

  • the present invention relates to a frequency division duplex (FDD) system of Long Term Evolution (LTE) and a coexistence technology of a Time Division Duplex (TDD) system, in particular, a TDD cell is provided for a terminal.
  • FDD frequency division duplex
  • TDD Time Division Duplex
  • LTE technology has two duplex modes, FDD and TDD.
  • FDD mode the uplink transmission and the downlink reception of the user equipment (UE, User Equipment) are performed on the uplink frequency band and the downlink frequency band, respectively, and the uplink transmission and the downlink reception may occur simultaneously.
  • TDD mode the uplink transmission and the downlink reception of the UE are performed at different times, and uplink transmission and downlink reception cannot occur at a certain time.
  • the spectrum resources of LTE are mainly 2500MHz ⁇ 2690MHz.
  • 2500MHz ⁇ 2570MHz is the uplink frequency band of LTE FDD
  • 2620MHz ⁇ 2690MHz is the downlink frequency band of LTE FDD
  • 2570MHz ⁇ 2620MHz is the frequency band of LTE TDD.
  • LTE's FDD & TDD hybrid solution is the mainstream planning solution.
  • FDD and TDD network coverage there may be both FDD and TDD network coverage.
  • the LTE FDD system coexists with the LTE TDD system, and the coexistence of adjacent frequencies becomes the primary problem to be solved.
  • eNBs evolved NodeBs
  • eNB 1 and eNB 2 eNB 1 adopts FDD mode
  • eNB 2 adopts TDD mode
  • eNB l and eNB_2 respectively cover cell 1 (Cell_l) and cell 2 (Cell_2)
  • Cell l and Cell-2 provide services for UE-1 and UE-2, respectively, and the coverage areas of eNB-1 and eNB-2 overlap.
  • both UE-1 and UE-2 are in an overlapping portion of the coverage areas of eNB-1 and eNB-2, so that if the working frequency band of eNB-1 is close to the working frequency band of eNB-2, adjacent channel interference may occur. Specifically, if the TDD working band of the eNB-2 is closer to the FDD uplink frequency band of the eNB-1, the downlink data of the eNB-2 may interfere with the uplink reception of the eNB-1 due to out-of-band leakage, etc., that is, the transmission of the eNB-2.
  • the uplink transmission of UE-1 may also interfere with the downlink reception of UE-2; if the TDD working frequency band of eNB-2 is closer to the FDD downlink frequency band of eNB-1, The downlink transmission of eNB-1 may interfere with the uplink reception of eNB-2, and the uplink transmission of UE-2 may interfere with the downlink reception of UE-1.
  • a guard band (GB, Guard Band) may be set between the FDD and the TDD band, and the guard band is neither used for the TDD system nor the FDD system. Due to the existence of the guard band, there will be a distance between the operating band of the LTE FDD system and the LTE TDD system, which can avoid adjacent channel interference. However, since the guard band is not used by any system, it will cause waste of spectrum resources, which is not conducive to TDD. The development and application of technology. Therefore, inter-band interference and waste of spectrum resources are the main problems faced by LTE's FDD system and TDD system coexistence.
  • each cell has only one component carrier.
  • the cell corresponding to the component carrier serving the UE is the serving cell of the UE, and provides a series of functions for the UE through the serving cell, including Secure input, non-access stratum (NAS, Non Access Stratum) mobile information, radio link detection, paging, etc.
  • NAS non-access stratum
  • carrier aggregation technology has become an important feature of the LTE-Advanced standard.
  • each eNB may be configured with multiple component carriers (CCs).
  • the UE may also be configured and use multiple component carriers.
  • the component carriers are divided into primary component carriers and secondary members. Secondary Component Carrier.
  • Primary member carrier is carrier A carrier that provides complete service to the UE in the aggregation, that is, in the absence of the secondary component carrier, the UE can work normally only by the primary component carrier.
  • the secondary component carrier is introduced into the LTE-Advanced standard in order to expand the working bandwidth and improve the throughput of the LTE device, and cannot provide a complete service for the UE, and cannot exist separately from the primary component carrier.
  • a UE that aggregates multiple component carriers will transmit and receive on multiple component carriers. As shown in FIG. 4, UE-1 is configured with three component carriers fl, £2, and ⁇ , and UE-2 is configured with two component carriers f4 and f5, where f (n is a positive integer) indicating different frequencies. Carrier. In the LTE carrier frequency band, some TDD carriers and some FDD carriers may be similar in frequency. Therefore, mutual interference may occur between these carriers, which may make the LTE system unable to work normally and affect the user experience.
  • the main object of the present invention is to provide a method and system for providing services for a terminal by a TDD cell, to solve the problem of inter-band interference and spectrum resource waste existing when the FDD system and the TDD system coexist.
  • the present invention provides a method for a TDD cell to provide a service for a terminal, where the method includes: pre-configuring, in an eNB of a TDD system, a cell capable of generating interference between a cell mid-band and an FDD uplink frequency band provided by the eNB, An uplink cell that is used for transmitting only uplink data, and configured a cell capable of generating interference between the intra-cell frequency band and the FDD downlink frequency band provided by the eNB as a downlink cell used for transmitting downlink data only, and in the eNB And storing the configuration information of the uplink cell and the configuration information of the downlink cell; the eNB transmitting the configuration information of the uplink cell and the configuration information of the downlink cell to the UE;
  • the UE receives the configuration information of the uplink cell and the configuration information of the downlink cell, and performs data transmission with the eNB by using the uplink cell and/or the downlink cell.
  • the eNB saves the configuration information of the uplink cell and the configuration information of the downlink cell, and the eNB saves the configuration information of each uplink cell as an uplink cell list, and the downlink cell
  • the configuration information is saved as a downlink cell list.
  • the eNB transmits the configuration information of the uplink cell and the configuration information of the downlink cell to the UE, where the eNB passes the configuration information of the uplink cell and the configuration information of the downlink cell. Or multiple system messages (System Information) are sent to the UE.
  • System Information System Information
  • the eNB sends the configuration information of the uplink cell and the configuration information of the downlink cell to the UE by using any one or more system messages, including: the eNB includes configuration information of all uplink cells.
  • the uplink cell list and the downlink cell list including configuration information of all downlink cells are added to any one or more system messages, and the system message is periodically broadcasted.
  • the eNB sends the configuration information of the uplink cell to the UE, where: the eNB sends the configuration information of the uplink cell to the UE by using an RRC message.
  • the eNB sends the configuration information of the uplink cell to the UE by using an RRC message, where: the eNB carries the RRC Connection Setup message sent to the UE in the RRC setup process.
  • the uplink cell list includes the uplink cell configuration information.
  • SCell secondary cell
  • the eNB carries the uplink cell configuration information in the RRC Connection Reconfiguration message sent to the UE. Upstream cell list.
  • the method includes: the UE sending uplink data to the eNB by using the uplink cell, where the eNB passes the uplink cell Receiving uplink data sent by the UE; and/or, the eNB sends downlink data to the UE by using the downlink cell, where the UE receives downlink data sent by the eNB by using a downlink cell.
  • the method further includes: for each configured downlink cell, the eNB sets a cell barred (system barred) value of the system module type 1 (SIB-1) in the system message of each downlink cell to "prohibited ( Barred )" , or in the system message of each downlink cell does not include any one or more of the main information block (MIB) / SIB-1 / system information block type 2 (SIB 2 ), or the system in each downlink cell An information indicating that the cell is a downlink cell is added to the information. After that, the eNB periodically broadcasts the system message of each downlink cell.
  • SIB-1 system module type 1
  • SIB 2 system information block type 2
  • the UE determines the current Whether the value of cellBarred of SIB-1 in the system information of the cell is "barred"; or, determining whether one or more of MIB/SIB-1/SIB-2 are missing in the system information of the current cell; or, determining the current Whether the system information of the cell includes an identifier for indicating that the cell is a downlink cell; if yes, it does not camp on the current cell; otherwise, the current cell is selected. After reselection, the current camped cell.
  • the method further includes: after receiving the uplink cell configuration information, the UE determines, according to the configuration information, whether the current cell is an uplink cell, and if yes, does not perform measurement reporting on the current cell, otherwise, The current cell is measured and reported.
  • the present invention further provides a system for providing a service to a terminal by using a TDD cell, where the system includes: a TDD eNB and a TDD UE, wherein, in the TDD eNB, interference between a frequency band and an FDD uplink frequency band can be generated in advance.
  • a cell configured as an uplink cell for transmitting only uplink data, and configured a cell capable of generating interference between a frequency band and an FDD downlink frequency band as a downlink cell for transmitting only downlink data, where the TDD eNB is configured to save the uplink
  • the configuration information of the cell and the configuration information of the downlink cell, and the configuration information of the uplink cell and the configuration information of the downlink cell are sent to the TDD UE;
  • the TDD UE is configured to receive configuration information of an uplink cell sent by the TDD eNB, and configuration information of a downlink cell, and perform data transmission with the TDD eNB by using the uplink cell and/or the downlink cell.
  • the TDD eNB is configured to receive the TDD by using the uplink cell. Uplink data sent by the UE, and/or sending downlink data to the TDD UE by using the downlink cell;
  • the TDD UE is configured to send uplink data to the TDD eNB by using the uplink cell, and/or receive downlink data sent by the TDD eNB by using a downlink cell.
  • the TDD eNB is further configured to set the value of the cellBarred of the system module type 1 (SIB-1) in the system message of each downlink cell to "barred", or do not include the main in the system message of each downlink cell.
  • SIB-1 system module type 1
  • SIB 2 system information block type 2
  • the TDD UE is further configured to: after receiving the system message of the current cell broadcast by the TDD eNB, perform determining whether the value of the cellBarred of the SIB-1 in the system information of the current cell is "barred" Or; determining whether any one or more of the MIB/SIB-1/SIB-2 is missing in the system information of the current cell; or determining whether the system information of the current cell is used to indicate that the cell is a downlink cell. If yes, it does not reside in the current cell; otherwise, after selecting or reselecting the current cell, it camps on the current cell.
  • the TDD UE is further configured to: after receiving the uplink cell configuration information sent by the TDD eNB, determine, according to the configuration information, whether the current cell is an uplink cell, and if yes, perform measurement reporting on the current cell. Otherwise, the current cell is measured and reported.
  • the method for providing a service to a terminal by the TDD cell of the present invention by setting a cell that generates interference between a frequency band and an FDD frequency band as an uplink cell for transmitting only uplink data or a downlink cell for transmitting only downlink data, so that the eNB and the UE
  • the TDD system can be used for data transmission between adjacent cells of the FDD system, which not only solves the interference between the FDD system and the TDD system, but also realizes the coexistence of the FDD and the TDD system, and can fully utilize the spectrum resources to ensure high utilization of the spectrum resources. save resources.
  • Figure 1 is a schematic diagram of frequency bands of FDD and TDD in an LTE system
  • FIG. 2 is a schematic diagram of a network scenario in which FDD and TDD coexist in LTE;
  • Figure 3 is a schematic diagram of a guard band
  • FIG. 4 is a schematic diagram of a network scenario using carrier aggregation technology
  • FIG. 5 is a schematic flowchart of a method for implementing a service provided by a TDD cell for a terminal according to the present invention
  • FIG. 6 is a schematic diagram of a frequency band for configuring an uplink cell and a downlink cell;
  • FIG. 7 is a schematic flowchart of an implementation process of a cell selection or reselection process performed by a UE of an LTE TDD. detailed description
  • the present invention provides a method for the TDD cell to provide services for the terminal, and the method mainly includes the following steps:
  • Step 501 The cell capable of generating interference between the intra-cell frequency band and the FDD uplink frequency band provided by the eNB is configured in advance as an uplink cell for transmitting only uplink data, and the eNB is provided on the eNB of the TDD system.
  • the cell capable of generating interference between the cell mid-band and the FDD downlink band is configured as a downlink cell for transmitting only downlink data, and the configuration information of the uplink cell and the configuration information of the downlink cell are stored in the eNB;
  • the eNB sends the configuration information of the uplink cell and the configuration information of the downlink cell to the UE;
  • Step 502 The UE receives the configuration information of the uplink cell and the configuration information of the downlink cell, and performs data transmission with the eNB by using the uplink cell and/or the downlink cell.
  • the cell capable of generating interference between the frequency band and the FDD uplink frequency band is configured as an uplink cell for transmitting only uplink data, and specifically includes: for the carrier provided by the eNB, the frequency band and the FDD uplink frequency band
  • the carrier of the TDD band capable of generating interference is configured as a component carrier for performing only uplink data transmission, and the cell corresponding to the carrier is an uplink cell for receiving only uplink data.
  • the eNB may disable the sending function of the component carrier. This configuration is implemented only by turning on its receiving function.
  • the cell capable of generating interference between the frequency band and the FDD downlink frequency band is configured as a downlink cell for transmitting only downlink data, and specifically includes: pre-boxing the frequency band and the FDD downlink frequency band on the eNB of the TDD system.
  • the carrier of the TDD band capable of generating interference is configured as a carrier for downlink data transmission only, and the cell corresponding to the component carrier is a downlink cell for transmitting only downlink data.
  • the eNB can implement the configuration by turning off the receiving function of the component carrier and only turning on the sending function.
  • the eNB may save the configuration information of the uplink cell and the configuration information of the downlink cell, where the eNB may save the configuration information of each uplink cell in the cell provided by the eNB as an uplink cell list; and the eNB will each downlink cell in the cell provided by the eNB.
  • the configuration information is saved as a downlink cell list.
  • the configuration information of all uplink cells and the configuration information of the downlink cell may be saved as an interference cell list.
  • the configuration information of the uplink cell includes related parameters of carriers corresponding to each uplink cell, indication information indicating that only uplink data transmission is supported, and information such as a cell identifier.
  • the configuration information of the downlink cell may include related parameters of carriers corresponding to each downlink cell, indication information indicating that only downlink data transmission is supported, and information such as a cell identifier.
  • the relevant parameters of the carrier may include parameters such as a frequency band of the carrier.
  • the eNB may send the configuration information of the uplink cell and the configuration information of the downlink cell to the UE, where the eNB may configure the uplink cell and the configuration information of the downlink cell.
  • the eNB may add an uplink cell list including all uplink cell configuration information, and a downlink cell list including all downlink cell configuration information to any one or more system messages, and periodically broadcast the system message. .
  • the eNB may add the interference cell list including each uplink cell configuration information and downlink cell configuration information to any one.
  • the system message is periodically broadcasted in one or more system messages.
  • the process in which the eNB sends the configuration information of the uplink cell to the UE may further include: the eNB sending the configuration information of the uplink cell to the UE by using an RRC message.
  • the eNB carries an uplink cell list including each uplink cell configuration information in a RRC Connection Setup message sent to the UE; or, when adding a secondary serving cell (SCell)
  • the eNB carries an uplink cell list including each uplink cell configuration information in a RRC Connection Reconfiguration (RRC Connection Reconfiguration) message sent to the UE.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • the process of performing data transmission with the eNB may include: the UE sending uplink data to the eNB by using the uplink cell, where the eNB receives the uplink cell. Uplink data sent by the UE; and/or, the eNB sends downlink data to the UE by using the downlink cell, and the UE receives downlink data sent by the eNB by using a downlink cell.
  • the method of the present invention may further include: for each configured downlink cell, the eNB sets the value of the cellBarred of the system module type 1 (SIB-1, System Information Block Typel) in the system message of each downlink cell to "barred". Or, in the system message of each downlink cell, does not include any one or more of a primary information block ( ⁇ , Master Information Block) / SIB-1 / System Information Block Type 2 (SIB 2 ), or in each downlink cell An identifier for indicating that the cell is a downlink cell is added to the system information; after that, the eNB periodically broadcasts the system message of each downlink cell; when the UE performs cell selection or reselection, after receiving the system message of the current cell, The system message of the current cell is determined to be resident, preventing the UE from performing cell selection and cell reselection on the downlink cell, so that the TDD UE only resides in the idle (IDLE) state.
  • SIB-1 System Information Block Typel
  • the UE determines that the cell of the SIB-1 in the system information of the current cell is prohibited (cellBarred) Whether the value is "barred"; or, determining whether one or more of MIB/SIB-1/SIB-2 are missing in the system information of the current cell; or, determining whether the system information of the current cell is included There is an identifier for indicating that the cell is a downlink cell; if yes, it does not camp on the current cell; otherwise, after selecting or reselecting the current cell, camping on the current cell.
  • the method may further include: after receiving the configuration information, the UE determines, according to the configuration information, whether the current cell is an uplink cell, and if yes, does not measure the current cell. Reported, otherwise, the current cell is measured and reported.
  • the UE After receiving the configuration information, the UE sets an uplink cell flag for each uplink cell in the list according to the uplink cell list in the configuration information, where the uplink cell flag is used to indicate that the cell can only be used for Upstream data transmission; Before the measurement of the current cell is reported, it is verified whether the current cell is set with the uplink cell flag, and if yes, the measurement is reported to the current cell, otherwise, the current cell is measured and reported.
  • the present invention further provides a system for providing services to a terminal by using a TDD cell, where the system mainly includes: a TDD eNB and a TDD UE, where a frequency band and an FDD uplink frequency band can be generated in advance on the TDD eNB.
  • the interfering cell is configured as an uplink cell for transmitting only uplink data
  • the cell capable of generating interference between the frequency band and the FDD downlink frequency band is configured as a downlink cell for transmitting only downlink data
  • the TDD eNB is used for storing the downlink cell.
  • the TDD UE receives the configuration information of the uplink cell sent by the TDD eNB, And configuration information of the downlink cell, and performing data transmission with the TDD eNB by using the uplink cell and/or the downlink cell.
  • the TDD eNB is configured to receive uplink data sent by the TDD UE by using the uplink cell, and/or send downlink data to the TDD UE by using the downlink cell, where the TDD UE is configured to pass the uplink cell. And transmitting uplink data to the TDD eNB, and/or receiving downlink data sent by the TDD eNB by using a downlink cell.
  • the TDD eNB may be further configured to set the value of the cellBarred of the system module type 1 (SIB-1) in the system message of each downlink cell to "barred", or do not include the main information block in the system message of each downlink cell.
  • SIB-1 system module type 1
  • the system message is periodically broadcasted;
  • the TDD UE is further configured to: after receiving the system message of the current cell broadcast by the TDD eNB, perform determining, according to the system message of the current cell, whether to camp .
  • the TDD UE may be further configured to: after receiving the uplink d and area configuration information sent by the TDD eNB, determine, according to the configuration information, whether the current cell is an uplink cell, and if yes, perform measurement reporting on the current cell. Otherwise, the current cell is measured and reported.
  • the process of configuring the uplink cell and the downlink cell on the TDD eNB is as follows:
  • the TDD CC adjacent to the LTE FDD uplink band is set to a member carrier (UL only CC) supporting only uplink data transmission
  • the TDD CC adjacent to the LTE FDD downlink band is set to be supported only.
  • Member carrier of downlink data transmission DL only CC
  • the UL only CC is a TDD CC that is closer to and interferes with the frequency band of the LTE FDD uplink CC, and is generally a TDD CC adjacent to the LTE FDD uplink frequency band.
  • the DL only CC is a TDD CC that is closer to and interferes with the frequency band of the LTE FDD downlink CC, and is generally a TDD CC adjacent to the LTE FDD downlink frequency band.
  • the LTE TDD eNB only uplink data transmission can be performed on the cell corresponding to the UL only CC, and the downlink subframe is closed.
  • the closed subframe time no data transmission and reception occurs, and the cell corresponding to the UL only CC is the uplink cell; only the downlink data transmission is performed on the cell corresponding to the DL only CC, and the uplink subframe is closed, DL only The cell corresponding to the CC is the uplink 'j, the area.
  • the TDD cell with the frequency band adjacent to the FDD uplink frequency band is set as the uplink cell, the eNB turns off the downlink channel of the uplink cell, and only receives the uplink data sent by the UE in the uplink cell; and, the TDD of the frequency band adjacent to the FDD downlink frequency band
  • the cell is configured as a downlink cell, and the eNB closes the uplink channel of the downlink cell, and only transmits downlink data to the UE in the downlink cell; the UE of the TDD transmits only uplink data in the uplink cell, does not receive downlink data, but only receives downlink data in the downlink cell, Do not send upstream data.
  • the UE aggregates the UL only CC, the UE only has uplink transmission on the UL only CC, and the downlink reception is closed to avoid mutual interference with the uplink CC of the FDD; if the UE aggregates the DL only CC, Then, on the DL only CC, the UE has only downlink reception, and the uplink transmission is closed to avoid mutual interference with the uplink CC of the FDD.
  • the UL only CC and the DL only CC can only be configured as the SCC of the UE, and cannot be used as the PCC.
  • the UL only CC and the DL only CC of the TDD band in carrier aggregation are not limited to the TDD CC adjacent to the FDD band.
  • any TDD CC that interferes with the FDD band can be set by the above method.
  • any TDD cell that can interfere with each other in the frequency band and the FDD band can be set as a UL only or DL only cell.
  • the eNB sends the configuration information of the uplink cell to the UE through the RRC message, and the following two options are available:
  • the eNB sends the configuration information of the uplink cell to the UE through the RRC Connection Setu message in the RRC establishment process.
  • the specific process is as follows: The UE sends an RRC Connection Request message to the eNB; the eNB receives the RRC Connection from the UE. After the request message, the RRC Connection Setu message is sent to the UE, where the RRC Connection Setup message carries the configuration information of the uplink cell.
  • the RRC Connection Setup message may include an UplinkOnlyCell List, which is included in the UplinkOnlyCell List.
  • the UE receives the RRC Connection Setu message sent by the eNB, extracts the configuration information of the uplink cell from the RRC Connection Setu message, and returns the RRC connection establishment completion to the eNB ( RRC Connection Setup Complete ) message.
  • the eNB sends the configuration information of the uplink cell to the UE by using a radio resource Config Dedicated part in the RRC Connection Reconfiguration message in the process of adding the SCell to the UE.
  • the specific process is as follows: The eNB sends an RRC Connection Reconfiguration message to the UE, and the UE adds the SCell.
  • the RRC Connection Reconfiguration message carries the configuration information of the reporting cell.
  • the RRC Connection Reconfiguration message may be carried in the radio resource Config Dedicated part of the RRC Connection Reconfiguration message.
  • the process of performing cell selection or reselection by the UE of the LTE TDD in the method for serving the terminal by the TDD cell according to the present invention includes:
  • the UE in the IDLE state needs to perform cell selection or reselection.
  • the UE performs cell search and synchronization, the UE searches for all frequency bands, and searches for the cell with the strongest signal in each frequency band.
  • the cell that normally provides the service resides. If the cell found by the UE is a downlink cell, no camping is performed.
  • the uplink cell since there is no downlink data transmission in the uplink cell, the UE cannot perceive the existence of the uplink cell, so it does not perform cell selection and camping.
  • the downlink cell system message carries a downlink cell identifier that is used to indicate that the cell only supports downlink data transmission, so that when the UE searches for the downlink cell, it reads that the cell system message includes the downlink cell identifier, and the cell does not Perform cell selection and residency.
  • the downlink cell identifier may be added in the SIB-1 or other SIB in the system message.
  • the process of cell selection or reselection by the UE of the LTE TDD is as follows:
  • the UE searches for a current TDD cell.
  • the UE acquires a system message of the current TDD cell, and determines, according to the obtained system message, whether the current TDD cell can reside.
  • the UE may determine, according to whether the system message of the current TDD cell satisfies any one or more of the following three criteria, if not, the UE does not perform cell selection or cell reselection on the current TDD cell, and continues to step 703, if yes, , then proceed to step 704:
  • the cell system information carries the downlink cell identifier.
  • the UE continues to search for other TDD cells, and returns to step 701 to repeat the foregoing process.
  • S704 The UE performs cell selection or reselection on the current TDD cell and camps.
  • the process of performing measurement reporting on the d and the area by the UE of the TDD 'J, the area service method, and the LTE TDD according to the present invention may be implemented in the following manner:
  • the UE receives the uplink cell configuration information sent by the eNB, for example, from An uplink cell list (UplinkOnlyFell List) of the eNB, the UE sets an uplink cell flag (UplinkOnlyFlag) for indicating that the cell can only be used for uplink data transmission, or the UE may be each for each uplink cell according to the configuration information of the uplink cell.
  • Each serving cell is configured with its own UplinkOnlyFlag, corresponding to the serving cell.
  • the value of UplinkOnlyFlag is not set, indicating that the cell is a non-upstream cell, and the measurement report event may be triggered. If the UE is configured with the measurement reporting trigger event A1/A2/A6, for a serving cell (Serving Cell), when the measured value satisfies the threshold of the A1/A2/A6 event, and the UplinkOnlyFlag corresponding to the serving cell is not If the cell is a non-upstream cell, the measurement of the A1/A2/A6 event is triggered.
  • the method for providing a service to a terminal by the TDD cell of the present invention by setting a cell that generates interference between a frequency band and an FDD frequency band as an uplink cell for transmitting only uplink data or a downlink cell for transmitting only downlink data, so that the eNB and the UE
  • the TDD system can be used for data transmission between adjacent cells of the FDD system, which not only solves the interference between the FDD system and the TDD system, but also realizes the coexistence of the FDD and the TDD system, and can fully utilize the spectrum resources to ensure high utilization of the spectrum resources. save resources.

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Abstract

本发明公开了一种TDD小区为终端提供服务的方法,所述方法包括:预先在TDDeNB上,将频带与FDD频带之间产生干扰的小区设置为只用于传输上行数据的上行小区或只用于传输下行数据的下行小区,并在所述eNB中保存所述上行小区的配置信息、以及下行小区的配置信息;所述eNB将所述上行小区的配置信息、以及下行小区的配置信息发送给UE;UE接收所述上行小区的配置信息、以及下行小区的配置信息,并通过所述上行小区、和/或下行小区与所述eNB进行数据传输。本发明还公开了一种通过TDD小区为终端提供服务的系统,解决了FDD系统与TDD系统在频带间的干扰,实现FDD与TDD系统共存,而且能够充分利用频谱资源,保证频谱资源的高利用率,节省资源。

Description

一种 TDD小区为终端提供服务的方法及系统 技术领域
本发明涉及长期演进(LTE, Long Term Evolution )的频分双工(FDD, Frequency Division Duplex ) 系统和时分双工 ( TDD, Time Division Duplex ) 系统的共存技术, 尤其涉及一种 TDD小区为终端提供服务的方法及系统。 背景技术
LTE技术有两种双工模式, 分别是 FDD和 TDD。 其中, FDD模式下, 用户设备 ( UE, User Equipment )的上行发送和下行接收分别在上行频带和 下行频带上进行, 上行发送和下行接收可以同时发生。 TDD模式下, UE 的上行发送和下行接收分别在不同的时间进行, 在某一时刻不能同时发生 上行发送和下行接收。 LTE的频谱资源主要是 2500MHz~2690MHz, 其中, 如图 1 所示, 2500MHz~2570MHz 是 LTE FDD 的上行频带, 2620MHz~2690MHz是 LTE FDD的下行频带, 2570MHz~2620MHz是 LTE TDD的频带。
随着无线电技术的发展, 在网络规划过程中, LTE的 FDD&TDD混合 方案是主流规划方案, 同一区域内, 可能会同时存在 FDD和 TDD的网络 覆盖。 LTE FDD系统与 LTE TDD系统同时存在,邻频共存成为需要解决的 首要问题。
在 LTE FDD系统与 LTE TDD系统共存时, 由于 FDD系统和 TDD系 统工作在互相邻近的频带, 那么带外泄露(Out of band emission ), 杂散发 射( Spurious emissions )等将造成两系统之间的邻频干扰, 影响网络性能。 例如, 如图 2所示的场景, 共有两个演进型基站(eNB, evolved NodeB ), 分别为 eNB 1和 eNB 2, eNB 1采用 FDD模式, eNB 2采用 TDD模式, eNB l和 eNB_2分别覆盖小区 1 ( Cell_l )和小区 2 ( Cell_2 ), Cell l和 Cell— 2分别为 UE— 1和 UE— 2提供服务, eNB— 1和 eNB— 2的覆盖区域有所 重叠, 并且 UE— 1和 UE— 2均处于 eNB— 1和 eNB— 2覆盖区域的重叠部分, 这样, 如果 eNB— 1的工作频带与 eNB— 2的工作频带距离较近, 将可能产生 邻频干扰, 具体的, 如果 eNB— 2的 TDD工作频带距离 eNB— 1的 FDD上行 频带较近, eNB— 2的下行数据会因为带外泄漏等原因干扰到 eNB— 1的上行 接收, 即 eNB— 2的发送干扰到 eNB— 1的接收, 同时, 在 UE侧, UE— 1的 上行发送也会干扰到 UE— 2的下行接收;如果 eNB— 2的 TDD工作频带距离 eNB— 1的 FDD下行频带较近, eNB— 1的下行发送会干扰到 eNB— 2的上行 接收, UE— 2的上行发送会干扰 UE— 1的下行接收。
为了避免产生 TDD系统与 FDD系统的邻频干扰, 如图 3所示, 可以 在 FDD与 TDD频带之间设置保护频带( GB, Guard Band ), 该保护频带既 不用于 TDD系统也不用于 FDD系统, 由于保护频带的存在, LTE FDD系 统和 LTE TDD系统的工作频带之间将出现一段距离, 可以避免邻频干扰, 但由于保护频带不被任何系统使用, 会造成频谱资源的浪费, 不利于 TDD 技术的发展和推广应用。因此,频带间干扰和频谱资源的浪费是 LTE的 FDD 系统与 TDD系统共存面临的主要问题。
在 LTE中, 只有一个成员载波服务于一个 UE,且每个小区只有一个成 员载波, 服务于 UE的成员载波对应的小区即为此 UE的服务小区, 通过服 务小区为 UE提供一系列功能, 包括安全输入、非接入层(NAS, Non Access Stratum )移动信息、 无线链路检测、 寻呼等。 随着 LTE标准的逐步推进, 载波聚合技术成为 LTE-Advanced标准的一个重要特性。在载波聚合技术中, 每个 eNB可能会配置多个成员载波(CC, Component Carrier ), UE也可能 被配置并使用多个成员载波,成员载波分为主成员载波( Primary Component Carrier )和辅成员载波 ( Secondary Component Carrier )。 主成员载波是载波 聚合中对 UE提供完整服务的载波, 即在没有辅成员载波存在的情况下, UE仅由主成员载波便可正常工作。而辅成员载波是为了扩大 LTE设备的工 作带宽、 提高吞吐量而被引入 LTE-Advanced标准的, 不能为 UE提供完整 的服务, 不能离开主成员载波而单独存在。聚合了多个成员载波的 UE将在 多个成员载波上进行发送和接收。 如图 4所示, UE— 1被配置了 3个成员载 波 fl、 £2和 β , UE— 2被配置了 2个成员载波 f4和 f5, 其中, f ( n为正整 数)表示不同频率的载波。在 LTE载波频带中, 某些 TDD载波和某些 FDD 载波可能会在频率上比较相近, 那么这些载波之间可能会产生相互干扰, 使 LTE系统无法正常工作, 影响用户体验。
对于 LTE技术 , FDD系统与 TDD系统共存的实现面临着频带间干扰 和频谱资源浪费的问题,并且同样影响着 LTE-Advance中载波聚合的实现。 发明内容
有鉴于此, 本发明的主要目的在于提供一种 TDD小区为终端提供服务 的方法及系统, 以解决 FDD系统与 TDD系统共存时存在的频带间干扰和 频谱资源浪费问题。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种 TDD小区为终端提供服务的方法, 所述方法包括: 预先在 TDD系统的 eNB上,将所述 eNB提供的小区中频带与 FDD上 行频带之间能够产生干扰的小区, 配置为只用于传输上行数据的上行小区, 并将所述 eNB提供的小区中频带与 FDD下行频带之间能够产生干扰的小区 配置为只用于传输下行数据的下行小区, 并在所述 eNB中保存所述上行小 区的配置信息、 以及下行小区的配置信息; 所述 eNB将所述上行小区的配 置信息、 以及下行小区的配置信息发送给 UE;
UE接收所述上行小区的配置信息、 以及下行小区的配置信息, 并通过 所述上行小区、 和 /或下行小区与所述 eNB进行数据传输。 在上述方案中, 所述 eNB保存所述上行小区的配置信息、 以及下行小 区的配置信息, 包括: 所述 eNB将所述各上行小区的配置信息保存为上行 小区列表, 将所述各下行小区的配置信息保存为下行小区列表。
在上述方案中, 所述 eNB将所述上行小区的配置信息、 以及下行小区 的配置信息发送给 UE, 为: 所述 eNB将所述上行小区的配置信息、 以及 下行小区的配置信息通过任意一个或多个系统消息 (System Information ) 发送给 UE。
在上述方案中, 所述 eNB将所述上行小区的配置信息、 以及下行小区 的配置信息通过任意一个或多个系统消息发送给 UE, 包括: 所述 eNB将 包含有所有上行小区的配置信息的上行小区列表、 以及包含有所有下行小 区的配置信息的下行小区列表添加到任意一个或多个系统消息中, 并周期 性的广播所述系统消息。
在上述方案中, 所述 eNB将所述上行小区的配置信息发送给 UE, 为: 所述 eNB将所述上行小区的配置信息通过 RRC消息发送给 UE。
在上述方案中,所述 eNB将所述上行小区的配置信息通过 RRC消息发 送给 UE, 包括: 在 RRC建立过程中, eNB在发送给 UE的无线资源控制 连接建立 ( RRC Connection Setup ) 消息里携带包含有各上行小区配置信息 的上行小区列表; 或者, 添加辅服务小区 (SCell ) 时, eNB 在发送给 UE 的无线资源控制连接重配置( RRC Connection Reconfiguration )消息中携带 包含有各上行小区配置信息的上行小区列表。
在上述方案中, 所述 UE接收到所述配置信息之后, 与所述 eNB进行 数据传输, 包括: 所述 UE通过所述上行小区向所述 eNB发送上行数据, 所述 eNB通过所述上行小区接收所述 UE发送的上行数据;和 /或,所述 eNB 通过所述下行小区向所述 UE发送下行数据,所述 UE通过下行小区接收所 述 eNB发送的下行数据。 在上述方案中, 所述方法还包括: 对于所配置的各下行小区, eNB 将 各下行小区的系统消息中系统模块类型 1 ( SIB— 1 )的小区禁止(cellBarred ) 取值设置为 "禁止(barred )" , 或者在各下行小区的系统消息中不包含主信 息块(MIB ) /SIB— 1/系统信息块类型 2 ( SIB 2 ) 中的任意一个或多个, 或 者在各下行小区的系统信息中添加用于指示该小区为下行小区的标识; 之后, eNB将各下行小区的系统消息进行周期性广播; UE在进行小区 选择或重选时, 接收到当前小区的系统消息后, 判断当前小区的系统信息 中 SIB—1的 cellBarred取值是否为 "barred" ; 或, 判断当前小区的系统信息 中是否缺少 MIB/SIB— 1/SIB— 2 中的任意一个或多个; 或, 判断当前小区的 系统信息中是否包含有用于指示该小区为下行小区的标识; 如果是, 则不 驻留在当前小区, 否则, 对当前小区进行选择或重选后, 驻留到当前小区。
在上述方案中, 所述方法还包括: 所述 UE接收到所述上行小区配置 信息后, 根据所述配置信息判断当前小区是否为上行小区, 如果是, 则不 对当前小区进行测量上报, 否则, 对当前小区进行测量上报。
本发明还提供了一种通过 TDD小区为终端提供服务的系统, 所述系统 包括: TDD eNB和 TDD UE , 其中, 预先在所述 TDD eNB上, 将频带与 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行数据的上 行小区, 并将频带与 FDD下行频带之间能够产生干扰的小区配置为只用于 传输下行数据的下行小区,所述 TDD eNB用于保存所述上行小区的配置信 息、 以及下行小区的配置信息, 并将所述上行小区的配置信息、 以及下行 小区的配置信息发送给 TDD UE;
TDD UE用于接收所述 TDD eNB发送的上行小区的配置信息、 以及下 行小区的配置信息, 并通过所述上行小区、 和 /或下行小区与所述 TDD eNB 进行数据传输。
在上述方案中, 所述 TDD eNB, 用于通过所述上行小区接收所述 TDD UE发送的上行数据, 和 /或通过所述下行小区向所述 TDD UE发送下行数 据;
所述 TDD UE,用于通过所述上行小区向所述 TDD eNB发送上行数据, 和 /或, 通过下行小区接收所述 TDD eNB发送的下行数据。
在上述方案中, TDD eNB, 还用于将各下行小区的系统消息中系统模 块类型 1 ( SIB— 1 ) 的 cellBarred取值设置为 "barred" , 或者在各下行小区 的系统消息中不包含主信息块 ( MIB ) /SIB— 1/系统信息块类型 2 ( SIB 2 ) 中的任意一个或多个, 或者在各下行小区的系统信息中添加用于指示该小 区为下行小区的标识; 并将所述系统消息进行周期性广播;
所述 TDD UE,还用于在进行小区选择或重选时,接收到所述 TDD eNB 广播的当前小区的系统消息后, 判断当前小区的系统信息中 SIB— 1 的 cellBarred取值是否为 "barred" ; 或, 判断当前小区的系统信息中是否缺少 MIB/SIB— 1/SIB— 2中的任意一个或多个; 或,判断当前小区的系统信息中是 否包含有用于指示该小区为下行小区的标识; 如果是, 则不驻留在当前小 区, 否则, 对当前小区进行选择或重选后, 驻留到当前小区。
在上述方案中, 所述 TDD UE, 还用于接收到所述 TDD eNB发送的上 行小区配置信息后, 根据所述配置信息判断当前小区是否为上行小区, 如 果是, 则不对当前小区进行测量上报, 否则, 对当前小区进行测量上报。
本发明的 TDD小区为终端提供服务的方法, 通过将频带与 FDD频带 之间产生干扰的小区设置为只用于传输上行数据的上行小区或只用于传输 下行数据的下行小区, 使得 eNB和 UE能够利用 TDD系统与 FDD系统相 邻小区进行数据传输, 不仅解决了 FDD系统与 TDD系统在频带间的干扰, 实现 FDD与 TDD系统共存, 而且能够充分利用频谱资源, 保证频谱资源 的高利用率, 节省资源。 附图说明
图 1为 LTE系统中 FDD和 TDD的频带示意图;
图 2为 LTE中 FDD与 TDD共存的一种网络场景示意图;
图 3为保护频带示意图;
图 4为采用载波聚合技术的一种网络场景示意图;
图 5为本发明 TDD小区为终端提供服务的方法实现流程示意图; 图 6为配置上行小区、 下行小区的频带示意图;
图 7为 LTE TDD的 UE进行小区选择或重选过程的实现流程示意图。 具体实施方式
为了实现 FDD系统与 TDD系统的共存, 避免不同频带间产生相互干 扰, 使 FDD系统与 TDD系统都能正常工作, 本发明提出一种 TDD小区为 终端提供服务的方法, 该方法主要包括以下步驟:
步驟 501 : 预先在 TDD系统的 eNB上, 将所述 eNB提供的小区中频 带与 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行数据 的上行小区,并将所述 eNB提供的小区中频带与 FDD下行频带之间能够产 生干扰的小区配置为只用于传输下行数据的下行小区, 并在所述 eNB中保 存所述上行小区的配置信息、 以及下行小区的配置信息; 所述 eNB将所述 上行小区的配置信息、 以及下行小区的配置信息发送给 UE;
步驟 502: UE接收所述上行小区的配置信息、 以及下行小区的配置信 息, 并通过所述上行小区、 和 /或下行小区与所述 eNB进行数据传输。
其中,步驟 501中,将频带与 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行数据的上行小区, 具体包括: 对于所述 eNB提供的 载波, 将频带与 FDD上行频带之间能够产生干扰的 TDD频带的载波配置 为只进行上行数据传输的成员载波, 所述载波所对应小区为只用于接收上 行数据的上行小区。 具体地, eNB 可以通过将成员载波的发送功能关闭, 仅开启其接收功能, 来实现该配置。
对于所述 eNB提供的载波,将频带与 FDD下行频带之间能够产生干扰 的小区配置为只用于传输下行数据的下行小区, 具体包括: 预先在 TDD系 统的 eNB上, 将频带与 FDD下行频带之间能够产生干扰的 TDD频带的载 波配置为只进行下行数据传输的载波, 所述成员载波所对应小区为只用于 发送下行数据的下行小区。 具体地, eNB 可以通过将成员载波的接收功能 关闭, 仅开启其发送功能, 来实现该配置。
所述 eNB保存上行小区的配置信息、 以及下行小区的配置信息, 具体 可以是: eNB 将自身所提供小区中各上行小区的配置信息保存为上行小区 列表; eNB 将自身所提供小区中各下行小区的配置信息保存为下行小区列 表。 或者, 还可以是: 将所有上行小区的配置信息、 以及下行小区的配置 信息保存为干扰小区列表。
这里, 所述上行小区的配置信息包含有各上行小区所对应载波的相关 参数、 表明仅支持上行数据传输的指示信息、 以及小区标识等信息。 同理, 下行小区的配置信息可以包含各下行小区所对应载波的相关参数、 表明仅 支持下行数据传输的指示信息、 以及小区标识等信息。
其中, 载波的相关参数可以包括该载波的频带等参数。
步驟 501中, 所述 eNB将所述上行小区的配置信息、 以及下行小区的 配置信息发送给 UE的过程, 可以为: 所述 eNB可以将所述上行小区的配 置信息、 以及下行小区的配置信息通过任意一个或多个系统消息 (System Information )发送给 UE。
具体地, eNB 可以将包含有所有上行小区配置信息的上行小区列表、 以及包含有所有下行小区配置信息的下行小区列表添加到任意一个或多个 系统消息中, 并周期性的广播所述系统消息。 或者, eNB 可以将包含有各 上行小区配置信息、 以及下行小区配置信息的干扰小区列表添加到任意一 个或多个系统消息中, 并周期性的广播所述系统消息。
这里, 所述 eNB将所述上行小区的配置信息发送给 UE的过程, 还可 以包括: 所述 eNB将所述上行小区的配置信息通过 RRC消息发送给 UE。
具体地, 在 RRC建立过程中, eNB在发送给 UE的无线资源控制连接 建立 ( RRC Connection Setup ) 消息里携带包含有各上行小区配置信息的上 行小区列表; 或者, 添加辅服务小区 (SCell ) 时, eNB在发送给 UE的无 线资源控制连接重配置( RRC Connection Reconfiguration )消息中携带包含 有各上行小区配置信息的上行小区列表。
步驟 502中, UE接收到所述配置信息之后, 与所述 eNB进行数据传 输的过程可以包括:所述 UE通过所述上行小区向所述 eNB发送上行数据, 所述 eNB通过所述上行小区接收所述 UE发送的上行数据;和 /或,所述 eNB 通过所述下行小区向所述 UE发送下行数据,所述 UE通过下行小区接收所 述 eNB发送的下行数据。
其中, 本发明的方法还可以包括: 对于所配置的各下行小区, eNB 将 各下行小区的系统消息中系统模块类型 1 ( SIB— 1 , System Information Block Typel ) 的 cellBarred取值设置为 "barred" , 或者在各下行小区的系统消息 中不包含主信息块( ΜΙΒ , Master Information Block ) /SIB— 1/系统信息块类 型 2 ( SIB 2 ) 中的任意一个或多个, 或者在各下行小区的系统信息中添加 用于指示该小区为下行小区的标识; 之后, eNB 将各下行小区的系统消息 进行周期性广播; UE在进行小区选择或重选时, 接收到当前小区的系统消 息后,根据所接收到当前小区的系统消息判断是否驻留, 防止 UE对下行小 区进行小区选择 ( cell selection )和小区重选( cell reselection ), 使得在 TDD UE 处于空闲 (IDLE )状态时, 只驻留在非上行小区、 以及非下行小区的 TDD小区。
具体地, UE判断当前小区的系统信息中 SIB— 1的小区禁止( cellBarred ) 取值是否为 "禁止 (barred )" ; 或, 判断当前小区的系统信息中是否缺少 MIB/SIB— 1/SIB— 2中的任意一个或多个; 或,判断当前小区的系统信息中是 否包含有用于指示该小区为下行小区的标识; 如果是, 则不驻留在当前小 区, 否则, 对当前小区进行选择或重选后, 驻留到当前小区。
其中, 在 UE接收到所述配置信息之后, 所述方法还可以包括: UE接 收到所述配置信息后, 根据所述配置信息判断当前小区是否为上行小区, 如果是, 则不对当前小区进行测量上报, 否则, 对当前小区进行测量上报。
具体地, UE接收到所述配置信息后, 根据所述配置信息中的上行小区 列表, 对列表中各上行小区设置上行小区标志位, 该上行小区标志位用于 表示所述小区只能用于上行数据传输; 在对当前小区进行测量上报之前, 验证当前小区是否设置有所述上行小区标志位, 如果是, 则拒绝对当前小 区进行测量上报, 否则, 对当前小区进行测量上报。
相应的, 本发明还提供了一种通过 TDD小区为终端提供服务的系统, 所述系统主要包括: TDD eNB和 TDD UE , 其中, 预先在 TDD eNB上, 将频带与 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行 数据的上行小区, 并将频带与 FDD下行频带之间能够产生干扰的小区配置 为只用于传输下行数据的下行小区,所述 TDD eNB用于保存所述上行小区 的配置信息、 以及下行小区的配置信息, 并将所述上行小区的配置信息、 以及下行小区的配置信息发送给 TDD UE; TDD UE接收所述 TDD eNB发 送的上行小区的配置信息、 以及下行小区的配置信息, 并通过所述上行小 区、 和 /或下行小区与所述 TDD eNB进行数据传输。
具体地, TDD eNB, 用于通过所述上行小区接收所述 TDD UE发送的 上行数据,和 /或通过所述下行小区向所述 TDD UE发送下行数据; TDD UE, 用于通过所述上行小区向所述 TDD eNB发送上行数据, 和 /或, 通过下行 小区接收所述 TDD eNB发送的下行数据。 其中, TDD eNB, 还可以用于将各下行小区的系统消息中系统模块类 型 1 ( SIB— 1 ) 的 cellBarred取值设置为 "barred" , 或者在各下行小区的系 统消息中不包含主信息块(MIB ) /SIB— 1/系统信息块类型 2 ( SIB 2 ) 中的 任意一个或多个, 或者在各下行小区的系统信息中添加用于指示该小区为 下行小区的标识; 并将所述系统消息进行周期性广播; TDD UE, 还用于在 进行小区选择或重选时,接收到所述 TDD eNB广播的当前小区的系统消息 后, 根据所接收到当前小区的系统消息判断是否驻留。
这里, 所述 TDD UE , 还可以用于接收到所述 TDD eNB发送的上行 d、 区配置信息后, 根据所述配置信息判断当前小区是否为上行小区, 如果是, 则不对当前小区进行测量上报, 否则, 对当前小区进行测量上报。
实际应用中,本发明 TDD小区为终端提供服务的方法中,在 TDD eNB 上配置上行小区和下行小区的过程, 具体如下:
如图 6所示,在 LTE TDD频带中,将临近 LTE FDD上行频带的 TDD CC 设置为仅支持上行数据传输的成员载波(UL only CC ), 将临近 LTE FDD 下行频带的 TDD CC设置为仅支持下行数据传输的成员载波 ( DL only CC )。 这里, UL only CC为与 LTE FDD上行 CC的频带较近并能与之产生相互干 扰的 TDD CC, —般是临近 LTE FDD上行频带的 TDD CC。 DL only CC为 与 LTE FDD下行 CC的频带较近并能与之产生相互干扰的 TDD CC, —般 是临近 LTE FDD下行频带的 TDD CC。如此,对于 LTE TDD eNB ,在 UL only CC对应的小区上只能够进行上行数据传输, 下行子帧被关闭。 在被关闭的 子帧时间里, 不发生任何数据收发, UL only CC对应的小区即为所述上行 小区;在 DL only CC对应的小区上只进行下行数据传输,上行子帧被关闭, DL only CC对应的小区即为所述上行' j、区。 从而, 将频带临近 FDD上行频 带的 TDD小区设置成了上行小区, eNB关闭上行小区的下行通道, 仅在上 行小区中接收 UE发送的上行数据;并且,将频带临近 FDD下行频带的 TDD 小区设置成了下行小区, eNB 关闭下行小区的上行通道, 在下行小区只向 UE发送下行数据; TDD的 UE在上行小区仅发送上行数据, 不接收下行数 据, 而在下行小区仅接收下行数据, 不发送上行数据。
实际应用中, 如果 UE聚合了 UL only CC, 那么在该 UL only CC上, UE仅有上行发送, 下行接收被关闭, 以避免与 FDD的上行 CC产生相互 干扰; 如果 UE聚合了 DL only CC, 那么在该 DL only CC上, UE仅有下 行接收, 上行发送被关闭, 以避免与 FDD的上行 CC产生相互干扰。
通过以上的上行小区和下行小区配置, 使得在载波聚合中, UL only CC、 以及 DL only CC只能被配置成 UE的 SCC, 不能作为 PCC使用。
这里, 载波聚合中 TDD频带的 UL only CC和 DL only CC不仅限于与 FDD频带临近的 TDD CC, 在 FDD与 TDD系统共存时, 凡是与 FDD频带 产生干扰的 TDD CC,都可以通过上述方法被设置成 UL only CC或 DL only CC,在 FDD与 TDD系统共存时,凡是频带与 FDD频带能产生相互干扰的 TDD小区, 都可以被设置成 UL only或 DL only小区。
实际应用中, eNB通过 RRC消息将上行小区的配置信息发送给 UE的 具体过程, 可以有如下两种可选方案:
方案一: eNB在 RRC建立过程中通过 RRC Connection Setu 消息将上 行小区的配置信息发送给 UE, 具体过程如下: UE向 eNB发送 RRC连接 请求( RRC Connection Request )消息; eNB接收到来自 UE的 RRC Connection Request消息后,向 UE发送 RRC Connection Setu 消息,该 RRC Connection Setup消息中携带有上行小区的配置信息, 具体的, RRC Connection Setup 消息中可以包含一个上行小区列表( UplinkOnlyCell List ),该 UplinkOnlyCell List中包含有各上行小区的索引值、 以及所对应成员载波的频带; UE接收 eNB发送的 RRC Connection Setu 消息,从 RRC Connection Setu 消息中提 取上行小区的配置信息后, 向 eNB返回无线资源控制连接建立完成(RRC Connection Setup Complete ) 消息。
方案二: eNB在对 UE添加 SCell的过程中通过无线资源控制连接重配 置 (RRC Connection Reconfiguration ) 消息中的专有无线资源控制 (radio Resource Config Dedicated )部分将所述上行小区的配置信息发送给 UE, 具 体过程如下: eNB向 UE发送 RRC Connection Reconfiguration消息, 使 UE 添加 SCell, 其中, 该 RRC Connection Reconfiguration消息携带有上报小区 的配置信息, 例如, 可以在 RRC Connection Reconfiguration消息的 radio Resource Config Dedicated部分携带包含有各上行小区的索引值、 以及所对 应成员载波的频带的上行小区列表( UplinkOnlyCell List ); UE接收 eNB发 送的 RRC Connection Reconfiguration 消息, 从所述 RRC Connection Reconfiguration消息中提取上行小区的配置信息, 并根据 RRC Connection Reconfiguration消息进行用于添加 SCell的配置。
实际应用中, 基于本发明的 TDD 小区为终端提供服务的方法中 LTE TDD的 UE进行小区选择或重选的过程, 包括:
处于 IDLE状态的 UE, 需要进行小区选择或重选, 首先 UE进行小区 搜索和同步, UE搜索所有的频带, 并在每个频带上寻找信号最强的小区, 在这个过程中, 一旦找到一个能够正常提供服务的小区, 则进行驻留。 如 果 UE找到的小区为下行小区, 则不进行驻留。 对于上行小区, 由于上行小 区不存在任何下行数据的发送, UE不能感知到上行小区的存在, 故不会对 其进行小区选择和驻留。
对于防止 UE对下行小区进行小区选择或重选, 有如下三种方法: 1、 将下行小区系统消息的 SIB— 1中 cellBarred取值设置为" barred", 使 得 UE在搜索到下行小区时, 读取到该小区系统消息的 SIB— 1中 cellBarred 的值为 "barred" , 则不对下行小区进行小区选择和驻留。
2、在下行小区系统消息中不包含 MIB/SIB— 1/SIB— 2中的任何一个或多 个, 使得 UE 在搜索到下行小区时, 读取到该小区系统消息中缺少 MIB/SIB— 1/SIB— 2中的任何一个, 则不对小区进行小区选择和驻留。
3、 在下行小区系统消息中携带用于指示该小区仅支持下行数据传输的 下行小区标识,使得 UE在搜索到下行小区时,读取到该小区系统消息中包 含下行小区标识, 则不对该小区进行小区选择和驻留。 具体的, 可以在系 统消息中 SIB— 1或其它 SIB里增加下行小区标识。
如图 7所示, LTE TDD的 UE进行小区选择或重选的过程, 具体流程 如下:
S701、 UE搜索到当前的 TDD小区;
S702、 UE获取当前 TDD小区的系统消息, 并根据所获取的系统消息 判断当前的 TDD小区是否能够驻留;
具体的, UE可以按照判断当前 TDD小区的系统消息是否满足如下三 条判断准则的任意一个或多个, 如果否, 则 UE不对当前的 TDD小区进行 小区选择或小区重选, 继续步驟 703 , 如果是, 则继续步驟 704:
( 1 )该小区系统信息的 SIB— 1中 cellBarred取值为 "barred" ;
( 2 )该小区的系统信息中缺少 MIB/SIB— 1/SIB— 2中的一个或多个;
( 3 )该小区系统信息中携带下行小区标识。
5703、 UE继续搜索其他 TDD小区, 返回步驟 701 , 重复上述过程;
5704、 UE对当前 TDD小区进行小区选择或重选并驻留。
实际应用中, 基于本发明的 TDD 'J、区服务方法, LTE TDD的 UE对 d、 区进行测量上报的过程, 可以通过以下方式实现: UE接收到 eNB发送的 上行小区配置信息,例如,来自 eNB的上行小区列表( UplinkOnlyCell List ), UE根据上行小区的配置信息, 为各上行小区设置用于表示所述小区只能用 于上行数据传输的上行小区标志(UplinkOnlyFlag ), 或者, UE可以为每一 个服务小区都配置各自的 UplinkOnlyFlag , 在该服务小区对应的 UplinkOnlyFlag的值未被置位,表示该小区为非上行小区, 才可能触发测量 上报事件。 如果 UE被配置了测量上报触发事件 A1/A2/A6, 对于一个服务 小区 ( Serving Cell ), 当其测量值满足 A1/A2/A6事件的门限值, 并且同时 该服务小区对应的 UplinkOnlyFlag没有被置位, 即该小区为非上行小区, 则触发 A1/A2/A6事件的测量上报。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。 工业实用性
本发明的 TDD小区为终端提供服务的方法, 通过将频带与 FDD频带 之间产生干扰的小区设置为只用于传输上行数据的上行小区或只用于传输 下行数据的下行小区, 使得 eNB和 UE能够利用 TDD系统与 FDD系统相 邻小区进行数据传输, 不仅解决了 FDD系统与 TDD系统在频带间的干扰, 实现 FDD与 TDD系统共存, 而且能够充分利用频谱资源, 保证频谱资源 的高利用率, 节省资源。

Claims

权利要求书
1、 一种时分双工 TDD小区为终端提供服务的方法, 其特征在于, 所 述方法包括:
预先在 TDD 系统的基站 eNB上, 将所述 eNB提供的小区中频带与频 分双工 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行数 据的上行小区,并将所述 eNB提供的小区中频带与 FDD下行频带之间能够 产生干扰的小区配置为只用于传输下行数据的下行小区, 并在所述 eNB中 保存所述上行小区的配置信息、 以及下行小区的配置信息; 所述 eNB将所 述上行小区的配置信息、 以及下行小区的配置信息发送给用户设备 UE;
UE接收所述上行小区的配置信息、 以及下行小区的配置信息, 并通过 所述上行小区、 和 /或下行小区与所述 eNB进行数据传输。
2、 根据权利要求 1所述 TDD小区为终端提供服务的方法, 其特征在 于, 所述 eNB保存所述上行小区的配置信息、 以及下行小区的配置信息, 包括: 所述 eNB将所述各上行小区的配置信息保存为上行小区列表, 将所 述各下行小区的配置信息保存为下行小区列表。
3、 根据权利要求 1或 2所述 TDD小区为终端提供服务的方法, 其特 征在于, 所述 eNB将所述上行小区的配置信息、 以及下行小区的配置信息 发送给 UE, 为: 所述 eNB将所述上行小区的配置信息、 以及下行小区的 配置信息通过任意一个或多个系统消息 System Information发送给 UE。
4、 根据权利要求 3所述 TDD小区为终端提供服务的方法, 其特征在 于, 所述 eNB将所述上行小区的配置信息、 以及下行小区的配置信息通过 任意一个或多个系统消息发送给 UE, 包括: 所述 eNB将包含有所有上行 小区的配置信息的上行小区列表、 以及包含有所有下行小区的配置信息的 下行小区列表添加到任意一个或多个系统消息中, 并周期性的广播所述系 统消息。
5、 根据权利要求 1或 1所述 TDD小区为终端提供服务的方法, 其特 征在于, 所述 eNB将所述上行小区的配置信息发送给 UE, 为: 所述 eNB 将所述上行小区的配置信息通过 RRC消息发送给 UE。
6、 根据权利要求 5所述 TDD小区为终端提供服务的方法, 其特征在 于,所述 eNB将所述上行小区的配置信息通过 RRC消息发送给 UE, 包括: 在 RRC建立过程中, eNB在发送给 UE的无线资源控制连接建立 RRC Connection Setup消息里携带包含有各上行小区配置信息的上行小区列表; 或者, 添加辅服务小区 SCell时, eNB在发送给 UE的无线资源控制连接重 配置 RRC Connection Reconfiguration消息中携带包含有各上行小区配置信 息的上行小区列表。
7、 根据权利要求 1所述 TDD小区为终端提供服务的方法, 其特征在 于, 所述 UE接收到所述配置信息之后, 与所述 eNB进行数据传输, 包括: 所述 UE通过所述上行小区向所述 eNB发送上行数据, 所述 eNB通过 所述上行小区接收所述 UE发送的上行数据; 和 /或, 所述 eNB通过所述下 行小区向所述 UE发送下行数据, 所述 UE通过下行小区接收所述 eNB发 送的下行数据。
8、 根据权利要求 1或 7所述 TDD小区为终端提供服务的方法, 其特 征在于, 所述方法还包括:
对于所配置的各下行小区, eNB 将各下行小区的系统消息中系统模块 类型 1SIB— 1的小区禁止 cellBarred取值设置为 "禁止 barred" , 或者在各下 行小区的系统消息中不包含主信息块 MIB/SIB— 1/系统信息块类型 2SIB— 2 中的任意一个或多个, 或者在各下行小区的系统信息中添加用于指示该小 区为下行小区的标识;
之后, eNB将各下行小区的系统消息进行周期性广播; UE在进行小区 选择或重选时, 接收到当前小区的系统消息后, 判断当前小区的系统信息 中 SIB— 1的 cellBarred取值是否为 "barred" ; 或, 判断当前小区的系统信息 中是否缺少 MIB/SIB— 1/SIB— 2 中的任意一个或多个; 或, 判断当前小区的 系统信息中是否包含有用于指示该小区为下行小区的标识; 如果是, 则不 驻留在当前小区, 否则, 对当前小区进行选择或重选后, 驻留到当前小区。
9、 根据权利要求 1或 7所述 TDD小区为终端提供服务的方法, 其特 征在于, 所述方法还包括:
所述 UE接收到所述上行小区配置信息后,根据所述配置信息判断当前 小区是否为上行小区, 如果是, 则不对当前小区进行测量上报, 否则, 对 当前小区进行测量上报。
10、 一种通过 TDD小区为终端提供服务的系统, 其特征在于, 所述系 统包括: TDD eNB和 TDD UE , 其中, 预先在所述 TDD eNB上, 将频带 与 FDD上行频带之间能够产生干扰的小区, 配置为只用于传输上行数据的 上行小区, 并将频带与 FDD下行频带之间能够产生干扰的小区配置为只用 于传输下行数据的下行小区,所述 TDD eNB用于保存所述上行小区的配置 信息、 以及下行小区的配置信息, 并将所述上行小区的配置信息、 以及下 行小区的配置信息发送给 TDD UE;
TDD UE用于接收所述 TDD eNB发送的上行小区的配置信息、 以及下 行小区的配置信息, 并通过所述上行小区、 和 /或下行小区与所述 TDD eNB 进行数据传输。
11、 根据权利要求 10所述通过 TDD小区为终端提供服务的系统, 其 特征在于, 所述 TDD eNB , 用于通过所述上行小区接收所述 TDD UE发送 的上行数据, 和 /或通过所述下行小区向所述 TDD UE发送下行数据;
所述 TDD UE,用于通过所述上行小区向所述 TDD eNB发送上行数据, 和 /或, 通过下行小区接收所述 TDD eNB发送的下行数据。
12、根据权利要求 10或 11所述通过 TDD小区为终端提供服务的系统, 其特征在于,
所述 TDD eNB, 还用于将各下行小区的系统消息中系统模块类型 1 ( SIB— 1 ) 的 cellBarred取值设置为 "barred" , 或者在各下行小区的系统消 息中不包含 MIB/SIB— 1/ SIB 2中的任意一个或多个, 或者在各下行小区的 系统信息中添加用于指示该小区为下行小区的标识; 并将所述系统消息进 行周期性广播;
所述 TDD UE,还用于在进行小区选择或重选时,接收到所述 TDD eNB 广播的当前小区的系统消息后, 判断当前小区的系统信息中 SIB— 1 的 cellBarred取值是否为 "barred" ; 或, 判断当前小区的系统信息中是否缺少 MIB/SIB— 1/SIB— 2中的任意一个或多个; 或,判断当前小区的系统信息中是 否包含有用于指示该小区为下行小区的标识; 如果是, 则不驻留在当前小 区, 否则, 对当前小区进行选择或重选后, 驻留到当前小区。
13、根据权利要求 10或 11所述通过 TDD小区为终端提供服务的系统, 其特征在于, 所述 TDD UE, 还用于接收到所述 TDD eNB发送的上行小区 配置信息后, 根据所述配置信息判断当前小区是否为上行小区, 如果是, 则不对当前小区进行测量上报, 否则, 对当前小区进行测量上报。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105659687A (zh) * 2013-08-07 2016-06-08 交互数字专利控股公司 在上行链路/下行链路解耦情形中的低成本mtc设备的覆盖增强

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11451275B2 (en) 2004-04-02 2022-09-20 Rearden, Llc System and method for distributed antenna wireless communications
US11309943B2 (en) 2004-04-02 2022-04-19 Rearden, Llc System and methods for planned evolution and obsolescence of multiuser spectrum
US11394436B2 (en) 2004-04-02 2022-07-19 Rearden, Llc System and method for distributed antenna wireless communications
US10985811B2 (en) 2004-04-02 2021-04-20 Rearden, Llc System and method for distributed antenna wireless communications
CN102045685B (zh) * 2009-10-15 2012-06-27 华为技术有限公司 小区重选列表和/或频率列表建立方法及装置
CN102300158B (zh) * 2010-06-28 2015-03-11 中国移动通信集团公司 时分双工系统中获知载波信息及载波信息指示方法和设备
US9584297B2 (en) 2012-05-11 2017-02-28 Qualcomm Incorporated Interference management for adaptive TDD with frequency domain separations
CN103634804A (zh) * 2012-08-28 2014-03-12 株式会社Ntt都科摩 邻频共存下的频率分配方法及网络实体
US11050468B2 (en) * 2014-04-16 2021-06-29 Rearden, Llc Systems and methods for mitigating interference within actively used spectrum
US11190947B2 (en) 2014-04-16 2021-11-30 Rearden, Llc Systems and methods for concurrent spectrum usage within actively used spectrum
US11189917B2 (en) 2014-04-16 2021-11-30 Rearden, Llc Systems and methods for distributing radioheads
US10194346B2 (en) 2012-11-26 2019-01-29 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
US10164698B2 (en) 2013-03-12 2018-12-25 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
RU2767777C2 (ru) 2013-03-15 2022-03-21 Риарден, Ллк Системы и способы радиочастотной калибровки с использованием принципа взаимности каналов в беспроводной связи с распределенным входом - распределенным выходом
WO2014205825A1 (zh) * 2013-06-28 2014-12-31 富士通株式会社 资源配置方法、装置和系统
JP6425891B2 (ja) * 2014-01-14 2018-11-21 株式会社Nttドコモ ユーザ端末および無線通信方法
US11290162B2 (en) 2014-04-16 2022-03-29 Rearden, Llc Systems and methods for mitigating interference within actively used spectrum
US9806874B2 (en) * 2014-05-09 2017-10-31 Apple Inc. Spectrum enhancement and user equipment coexistence through uplink/downlink decoupling for time division duplexing and through non-continuous frame structures for frequency division duplexing
TWI583227B (zh) * 2014-10-24 2017-05-11 宏碁股份有限公司 處理成爲阻擋狀態之服務細胞的方法、使用此方法的基地台及使用此方法的使用者設備
WO2017062062A1 (en) 2015-10-08 2017-04-13 Intel IP Corporation Enhanced self-contained time-division duplex subframe structure
CN106060831A (zh) * 2016-08-12 2016-10-26 努比亚技术有限公司 伪基站识别装置及方法
CN111491377A (zh) * 2019-01-28 2020-08-04 华为技术有限公司 资源分配方法、终端及基站
US11917594B2 (en) * 2019-06-03 2024-02-27 Qualcomm Incorporated Frequency division duplexing in unpaired spectrum
CN112055417B (zh) * 2019-06-06 2022-08-26 华为技术有限公司 无线通信系统、调度方法、无线通信方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1748377A (zh) * 2003-02-11 2006-03-15 Ip无线有限公司 用于通信系统中的时分双工操作的方法、基站和移动台
CN101631316A (zh) * 2008-07-16 2010-01-20 中国移动通信集团公司 在tdd系统中提高频谱利用率的方法和设备
WO2010045752A1 (zh) * 2008-10-20 2010-04-29 上海贝尔阿尔卡特股份有限公司 Tdd家庭基站的载频选择方法及载频调整装置
CN101778392A (zh) * 2009-01-08 2010-07-14 中国移动通信集团公司 一种保护频带的使用方法及设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200812311A (en) * 2006-06-06 2008-03-01 Sr Telecom Inc Utilizing guard band between FDD and TDD wireless systems
IL190659A0 (en) 2008-04-07 2008-12-29 Mariana Goldhamer Wireless communication network with relay stations
CN101729125B (zh) * 2008-10-31 2012-06-27 电信科学技术研究院 一种信号发送方法和装置
KR101621102B1 (ko) 2009-04-21 2016-05-16 엘지전자 주식회사 다중 반송파 시스템에서 반송파의 설정장치 및 방법
US20100272017A1 (en) * 2009-04-23 2010-10-28 Interdigital Patent Holdings, Inc. Method and apparatus for processing advanced long term evolution system information
US8553589B2 (en) * 2009-05-12 2013-10-08 Airhop Communications, Inc. Dual mode radio for frequency division duplexing and time division duplexing communication modes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1748377A (zh) * 2003-02-11 2006-03-15 Ip无线有限公司 用于通信系统中的时分双工操作的方法、基站和移动台
CN101631316A (zh) * 2008-07-16 2010-01-20 中国移动通信集团公司 在tdd系统中提高频谱利用率的方法和设备
WO2010045752A1 (zh) * 2008-10-20 2010-04-29 上海贝尔阿尔卡特股份有限公司 Tdd家庭基站的载频选择方法及载频调整装置
CN101778392A (zh) * 2009-01-08 2010-07-14 中国移动通信集团公司 一种保护频带的使用方法及设备

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105659687A (zh) * 2013-08-07 2016-06-08 交互数字专利控股公司 在上行链路/下行链路解耦情形中的低成本mtc设备的覆盖增强
EP3031283A2 (en) * 2013-08-07 2016-06-15 Interdigital Patent Holdings, Inc. Coverage enhancements of low cost mtc devices in uplink/downlink decoupled scenario
EP3031283B1 (en) * 2013-08-07 2022-10-05 Interdigital Patent Holdings, Inc. Coverage enhancements of low cost mtc devices in uplink/downlink decoupled scenario
US11470619B2 (en) 2013-08-07 2022-10-11 Interdigital Patent Holdings, Inc. Coverage enhancements of low cost MTC devices in uplink/downlink decoupled scenario

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