WO2015176423A1 - 一种将不同通信终端接入同一小区的方法、基站和终端 - Google Patents
一种将不同通信终端接入同一小区的方法、基站和终端 Download PDFInfo
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- H04W48/16—Discovering, processing access restriction or access information
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- the present invention relates to mobile communication technologies, and in particular to a method, a base station and a terminal for connecting different communication terminals to the same cell.
- LTE Long Term Evolution
- the 3rd Generation Partnership Project (3GPP) divides the available frequencies of the LTE network into multiple frequency bands (Band) to facilitate the regional and national planning according to its own spectrum. Network deployment.
- Each band (Band) is actually a certain frequency range, which is indicated by a band indicator. Different bands have overlapping frequencies.
- LTE terminals There are many types of communication terminals (especially LTE terminals), but they are limited by power consumption, cost, and operator customization. Different communication terminals support different types of buses, and may support multiple bands or only one band. For example, one LTE cell Cell_1 planned by the operator A has a system bandwidth of 20 MHz, the associated frequency band is Band A, and another Band B exists, which has a partial frequency overlap with the Band A, and only 15 MHz of the entire 20 MHz bandwidth of the cell Cell_1 belongs to Band B.
- the terminal UE1 supporting the Band A can access the cell Cell_1 normally.
- the downlink synchronization channel and the transmission channel are both in the 1.4 MHz of the cell center frequency, and the Master Information Block (MIB) is transmitted at the 1.4 MHz. Therefore, only the Band B terminal is supported.
- MIB Master Information Block
- UE2 attempts to access the cell Cell_1, although the downlink synchronization can be completed normally and the MIB is read normally, the system bandwidth of the cell Cell_1 is indicated to be 20M in the MIB, and the UE2 determines that its own capability does not support the system bandwidth, and cannot access the cell Cell_1 normally. business.
- the technical problem to be solved by the present invention is to provide a method, a base station, and a terminal for accessing different communication terminals to the same cell.
- different communication terminals cannot support some of the communication terminals because they support different working frequency bands. Defects in accessing the cell.
- an embodiment of the present invention provides a method for accessing a different communication terminal to a same cell, which is applied to an evolved base station eNB, where the method includes: acquiring, by the eNB, a different working frequency band to be supported by the eNB.
- a first working frequency band and a second working frequency band corresponding to each of the communication terminal and the second communication terminal; selecting a system monitoring bandwidth symmetric along a center frequency point of the cell, wherein the system monitoring bandwidth is not greater than the first working frequency band and the second a minimum bandwidth in the operating band; broadcasting the system listening bandwidth by the first system broadcast message, and broadcasting the system information SIB within the system listening bandwidth, so that the first communication terminal that listens to the first system broadcast message and After acquiring the system listening bandwidth, the second communication terminal can listen to acquire the SIB for accessing the cell on the system listening bandwidth.
- selecting a system listening bandwidth that is symmetric along a center frequency point of the cell includes: a first system bandwidth of a first working frequency band supported by the first communications terminal, and a second working capacity supported by the second communications terminal.
- the second system bandwidth of the frequency band, the first system bandwidth and the second system bandwidth are symmetrically distributed along the central frequency point of the cell, and the system listening bandwidth is the bandwidth value of the second system bandwidth.
- broadcasting the system listening bandwidth by using the first system broadcast message includes: modifying a first parameter in a main information block message data structure, where the first parameter records the system monitoring bandwidth supported by the cell, and broadcasting The master information block broadcasts a message as the first system.
- the method before the SIB is broadcasted in the system listening bandwidth, the method includes: adding a cell structure to the SIB broadcasted by the cell, indicating, in the cell structure, various working frequency bands supported by the cell, and various The system bandwidth corresponding to the working frequency band.
- the method further includes: the eNB scheduling the frequency domain resource for the communication terminal within a system bandwidth of the working frequency band supported by the communication terminal according to the working frequency band reported by each communication terminal.
- the scheduling of the frequency domain resource for the communication terminal in the system bandwidth of the working frequency band supported by the communication terminal includes: for the first communication terminal, notifying the first communication terminal in the corresponding first system in the cell structure
- the frequency domain resource scheduling information sent by the eNB is monitored in the bandwidth, and the uplink and downlink services are performed.
- the first system bandwidth is located in the bandwidth of the first working frequency band and is located in a bandwidth range supported by the cell;
- the terminal notifies the second communication terminal to monitor the frequency domain resource scheduling information delivered by the eNB in the corresponding second system bandwidth, and performs uplink and downlink services, where the bandwidth of the second system bandwidth is located in the second working frequency band.
- An apparatus for accessing different communication terminals to the same cell is applied to an evolved base station eNB, and includes: a working frequency band acquiring unit, configured to acquire a first communication terminal and a second communication terminal having different working frequency bands to be supported by the eNB Corresponding first working frequency band and second working frequency band; the bandwidth setting unit is configured to select a system listening bandwidth symmetric along a center frequency point of the cell, where the system monitoring bandwidth is not greater than the first working frequency band And a minimum value of the bandwidth in the second working frequency band; the main information block and the system information unit are configured to broadcast the system listening bandwidth by the first system broadcast message, and broadcast the system information SIB within the system listening bandwidth, so that the monitoring is performed The first communication terminal and the second communication terminal of the first system broadcast message can intercept and acquire an SIB for accessing the cell on the system listening bandwidth after acquiring the system listening bandwidth.
- the bandwidth setting unit includes: a system monitoring bandwidth setting module, configured to be a first system bandwidth of the first working frequency band supported by the first communication terminal, and greater than a second working frequency band supported by the second communication terminal.
- a system monitoring bandwidth setting module configured to be a first system bandwidth of the first working frequency band supported by the first communication terminal, and greater than a second working frequency band supported by the second communication terminal.
- the main information block and the system information unit comprise: a system monitoring bandwidth setting module, configured to modify the first parameter in the main information block message data structure, where the first parameter records the system monitoring supported by the cell bandwidth.
- the main information block and the system information unit comprise: a system information cell structure module, configured to add a cell structure in the SIB broadcasted by the cell, and indicate, in the cell structure, each supported by the cell The working frequency band and the system bandwidth corresponding to various working frequency bands.
- a communication terminal includes: a system listening bandwidth acquiring unit, configured to monitor a system listening bandwidth broadcasted by the evolved base station eNB by using a first system broadcast message; the system listening bandwidth is an eNB acquiring a first working frequency band to be supported by the eNB and the first After the second working frequency band, select a bandwidth symmetrical along the center frequency of the cell, and not greater than the bandwidth in the first working frequency band and the second working frequency band; the system information monitoring unit is set to obtain the monitoring bandwidth of the system. And acquiring, in the system listening bandwidth, the broadcast system information SIB for accessing the cell.
- the foregoing technical solution of the present invention has the following advantages: a policy of supporting different working frequency bands and different system bandwidths in the same cell is introduced in the evolved base station eNB, so that communication terminals supporting different working frequency bands can access the same cell.
- 1 is a schematic flow chart of a method for accessing different communication terminals to the same cell
- FIG. 2 is a schematic diagram showing a relationship between a first working frequency band and a second working frequency band
- FIG. 3 is a schematic diagram showing a process in which communication terminals supporting different working frequency bands can access the same LTE cell;
- FIG. 4 shows a schematic structural diagram of an apparatus for accessing different communication terminals to the same cell.
- a cell has a central frequency point of the cell, and the cell supports one to multiple frequency bands, and the frequency band has its corresponding system bandwidth.
- TDD Time Division Duplexing
- the center frequency of the cell is 2100 MHz and the system bandwidth is 20 MHz; then the working frequency band of this cell is 2090 to 2110 MHz, and the center frequency point is 2100 MHz at the working frequency band. center of.
- the neighboring cell may be the same as the center frequency of the cell, or may be different. If it is the same center frequency, LTE has inter-cell interference coordination technology to control inter-cell interference at the edge; if it is a different center frequency, the difference between the center frequency points is at least 20MHz, there will be no overlap in frequency. In the existing LTE, the bandwidth of the cell is 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz.
- An embodiment of the present invention provides a method for accessing different communication terminals to the same cell, and is applied to an evolved base station eNB. As shown in FIG. 1 , at least two communication terminals, a first working frequency band supported by the first communication terminal, and a second The second working frequency band supported by the communication terminal is different;
- Methods include:
- Step 101 Acquire a first working frequency band and a second working frequency band corresponding to each of the first communication terminal and the second communication terminal that have different working frequency bands to be supported by the eNB;
- Step 102 Select a system listening bandwidth that is symmetric along a center frequency point of the cell, where the system listening bandwidth is not greater than a bandwidth minimum in the first working frequency band and the second working frequency band;
- Step 103 Broadcast the system listening bandwidth by using a first system broadcast message, a Master Information Block (MIB), and broadcast system information (SIB, System Information Blocks) in the system listening bandwidth, so as to monitor the location.
- the first communication terminal and the second communication terminal of the first system broadcast message can monitor and acquire the system information SIB for accessing the cell on the system listening bandwidth after acquiring the system listening bandwidth.
- selecting a system listening bandwidth that is symmetric along a center frequency of the cell includes:
- the first system bandwidth of the first working frequency band Band A supported by the first communication terminal is greater than the second system bandwidth of the second working frequency band Band B supported by the second communication terminal, and the first system bandwidth and the second system bandwidth are both along the cell.
- the center frequency points are symmetrically distributed, and the system listening bandwidth is the bandwidth value of the second system bandwidth.
- the first communication terminal and the second communication terminal generally refer to an LTE terminal.
- the system listening bandwidth is obtained by: the Band A corresponding to the first communication terminal has a bandwidth of X MHz, and the Band B supported by the second communication terminal has a bandwidth of Y MHz. Symmetrical along the center of the cell, then XMHz is greater than YMHz, then usually, the system listening bandwidth is YMHz.
- broadcasting the system listening bandwidth by the first system broadcast message includes:
- the first parameter dl-Bandwidth is modified in the main information block message data structure, the first parameter records the system listening bandwidth supported by the cell, and the main information block is broadcasted as the first system broadcast message.
- the first parameter dl-Bandwidth is added to the main information block message data structure, and the first parameter dl-Bandwidth ranges from n6, n15, n25, n50, n75 and n100.
- a first parameter dl-Bandwidth is added in the main information block message data structure, and the first parameter dl-Bandwidth ranges from n6, n15, n25, n50, n75 and n100, and the following bold part is Add a cell.
- the value of the first parameter dl-Bandwidth in the MIB of the eNB is the system listening bandwidth in the new cell structure dl-BandwidthIndicatorlist in the system information SIB, so that the communication terminals supporting different bands can receive the system information of the cell. To solve the access problem.
- the method comprises:
- a cell structure dl-BandwidthIndicatorlist is added to the system information broadcasted by the cell, and the working frequency bands supported by the cell and their corresponding system bandwidths are indicated in the cell structure.
- the system information is specifically an SIB, and a cell structure dl-BandwidthIndicatorlist is added to the system information SIB broadcasted by the LTE cell, and the various Bands supported by the LTE cell and their corresponding system bandwidths are indicated in the cell structure dl-BandwidthIndicatorlist, the cell
- the contents of the structure dl-BandwidthIndicatorlist include the parameters freqBandIndicator and dl-Bandwidth.
- the data structure of the SystemInformationBlockType1 message part of the 3GPP TS36331 protocol, the bold part is the new cell structure.
- the method further includes:
- the eNB allocates frequency domain resources to the communication terminal within the system bandwidth of the working frequency band supported by the communication terminal according to the working frequency band reported by each communication terminal.
- the eNB on the network side selects the corresponding system bandwidth according to the frequency band support capability reported by the UE to schedule uplink and downlink resources for the UE; on the other hand, the UE supports the system bandwidth according to the cell structure dl-BandwidthIndicatorlist in the SIB. Monitor resource scheduling information for upstream and downstream services.
- the scheduling of the frequency domain resources for the communication terminal within the system bandwidth of the working frequency band supported by the communication terminal includes:
- the first communication terminal in the cell structure dl-BandwidthIndicatorlist, the first communication terminal is notified to monitor the frequency domain resource scheduling information sent by the eNB in the corresponding first system bandwidth, and the uplink and downlink services are performed, and the first system bandwidth is located in the Within the bandwidth of the first working frequency band and within the bandwidth supported by the cell;
- the second communication terminal in the cell structure dl-BandwidthIndicatorlist, the second communication terminal is notified to monitor the frequency domain resource scheduling information sent by the eNB in the corresponding second system bandwidth, and the uplink and downlink services are performed, and the second system bandwidth is located in the The bandwidth of the second working frequency band is within the bandwidth range supported by the cell.
- a process in which communication terminals supporting different working frequency bands can access the same LTE cell includes:
- Step 31 On the eNB side, set a cell to support both the first working frequency band Band A and the first working frequency band Band B, and the system bandwidth of the cell is flexibly set for different working frequency bands, and the system bandwidth of the Band A is set to x MHz, Band
- the system bandwidth of B is Y MHz, where Y ⁇ X, and X and YMHz are symmetric along the center frequency of the cell.
- Step 32 On the eNB side, set the first parameter dl-Bandwidth of the cell main information block MIB to YMHz, and set in the cell structure dl-BandwidthIndicatorlist of the system information SIB: the bandwidth of the corresponding system of the Band A is X MHz, and the Band B corresponds to The system bandwidth is YMHz;
- the information broadcast by the eNB has MIBs and multiple SIBs.
- the MIB includes a limited number of the most important and most commonly used transmission parameters. It needs to obtain other information from the cell and transmit it on the BCH.
- the SIB is carried on the SI (System). Information) in the message.
- step 33 the eNB broadcasts the main information block MIB on the system listening bandwidth.
- Step 34 On the UE side, the UE completes the downlink synchronization of the cell, reads the MIB of the cell, and monitors all the system information SIB of the acquired cell in the YMHz bandwidth according to the first parameter dl-Bandwidth indicated in the MIB.
- Step 35 The UE initiates an access procedure according to the system information SIB.
- Step 36 After the UE accesses the eNB, the eNB schedules the frequency domain resources for the UE within the system bandwidth supported by the UE according to the Band support capability reported by the UE.
- the eNB schedules resources on the XMHz bandwidth; if it is a terminal access that supports Band B, the eNB schedules resources on the Y MHz bandwidth;
- Step 37 On the UE side, the UE reads the cell structure dl-BandwidthIndicatorlist in the SIB, and monitors the frequency of the eNB to be sent in the corresponding system listening bandwidth indicated by the cell structure dl-BandwidthIndicatorlist according to the working frequency band supported by the UE. Domain resource scheduling information, normal uplink and downlink services.
- the system information SIB1 to SIB11 in the LTE system have different functions and carried data, and the system information here mainly refers to SIB1 in the system information.
- the UE supporting the Band A monitors the resource scheduling information and performs the service in the XMHz bandwidth; and the UE supporting the BandB monitors the resource scheduling information and performs the service in the YMHz bandwidth.
- An embodiment of the present invention provides a device for accessing different communication terminals to the same cell, and is applied to an eNB. As shown in FIG. 4, the method includes:
- the working frequency band obtaining unit 41 is configured to acquire a first working frequency band and a second working frequency band corresponding to each of the first communication terminal and the second communication terminal having different working frequency bands to be supported by the eNB;
- the bandwidth setting unit 42 is configured to select a system listening bandwidth symmetric along a center frequency point of the cell, where the system listening bandwidth is not greater than a bandwidth minimum in the first working frequency band and the second working frequency band;
- the main information block and system information unit 43 is configured to broadcast the system listening bandwidth by the first system broadcast message, and broadcast the system information SIB within the system listening bandwidth, so that the first system broadcast message is monitored. After acquiring the system listening bandwidth, the communication terminal and the second communication terminal can monitor and acquire the system information SIB for accessing the cell on the system listening bandwidth.
- the bandwidth setting unit 42 includes:
- the system monitoring bandwidth setting module is configured to be a first system bandwidth of the first working frequency band Band A supported by the first communication terminal, greater than a second system bandwidth of the second working frequency band Band B supported by the second communication terminal, and the first system When both the bandwidth and the second system bandwidth are symmetrically distributed along the center frequency of the cell, the system listening bandwidth is set to be the bandwidth value of the second system bandwidth.
- the master information block and system information unit 43 includes:
- the system monitoring bandwidth setting module is configured to modify the first parameter dl-Bandwidth in the main information block message data structure, where the first parameter records the system listening bandwidth supported by the cell.
- the master information block and system information unit 43 includes:
- the system information cell structure module is configured to add a cell structure dl-BandwidthIndicatorlist to the system information broadcasted by the cell, and indicate, in the cell structure, various working frequency bands supported by the cell and systems corresponding to various working frequency bands. bandwidth.
- the embodiment of the invention provides a communication terminal, including:
- the system monitoring bandwidth acquiring unit is configured to monitor the system listening bandwidth broadcasted by the evolved base station eNB through the first system broadcast message; the system listening bandwidth is selected after the eNB acquires the first working frequency band and the second working frequency band to be supported by the eNB. a bandwidth symmetric along a center frequency of the cell, and the bandwidth is not greater than a minimum value of the bandwidth in the first working frequency band and the second working frequency band;
- the system information monitoring unit is configured to monitor, after acquiring the system listening bandwidth, the broadcast system information SIB for accessing the cell in the system listening bandwidth.
- the frequency domain resource that receives the system information is determined according to the first parameter in the primary information block of the cell, where dl-Bandwidth is the cell structure dl in the system information SIB. - The minimum bandwidth indicated by BandwidthIndicatorlist, which ensures that different communication terminals can receive the system information of the cell and successfully initiate access.
- the network can schedule resources in the system bandwidth supported by the communication terminal according to the working frequency band reported by the communication terminal and the system bandwidth corresponding to each working frequency band in the cell structure, so that the scarce spectrum resource can be used more effectively and reasonably.
- the foregoing embodiments and preferred embodiments introduce a policy of supporting different working frequency bands and different system bandwidths in the same cell in the evolved base station eNB, so that communication terminals supporting different working frequency bands can access the same cell.
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Abstract
本发明提供一种将不同通信终端接入同一小区的方法、基站和终端。该方法包括：获取演进型基站待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段（101）；选择一个沿着小区的中心频点对称的系统监听带宽，系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值（102）；通过第一系统广播消息广播系统监听带宽，并在系统监听带宽内广播系统信息SIB，使得监听到第一系统广播消息的第一类型通信终端和第二类型通信终端能够在获取系统监听带宽后，在系统监听带宽上监听获取用于接入小区的SIB。在同一小区中支持不同工作频段和不同系统带宽，使得支持不同工作频段的通信终端均能接入同一小区。
Description
本发明涉及移动通信技术，特别是指一种将不同通信终端接入同一小区的方法、基站和终端。
长期演进(LTE，long Term Evolution)是继第三代移动通信之后主流的新一代移动通信标准，得到了全球运营商和设备商的普遍支持，目前LTE的全球化发展已是大势所趋。
为有效合理的使用LTE网络有限的无线频谱资源，国际标准化组织(3GPP，3rd Generation Partnership Project)将LTE网络可用频率划分为多个频段(Band)，以方便各地区和国家根据自身的频谱规划情况进行网络部署。每个频段(Band)实际为一定的频率范围，由一个频段编号(Band Indicator)指示，不同Band存在频率重叠的情况。
通信终端(特别是LTE终端)种类繁多，但受到功耗、造价和运营商定制等限制，不同的通信终端支持的Band有所不同，可能支持多个Band，也可能仅支持一个Band。例如，运营商A规划的一个LTE小区Cell_1，系统带宽为20MHz，所属频段为Band A，又存在另一个Band B，与Band A有部分频率重叠，且小区Cell_1的整个20MHz带宽中仅有15MHz属于Band B。
现有技术存在如下问题：支持Band A的终端UE1可以正常接入小区Cell_1。而依据3GPP协议，下行同步信道和传输信道均在小区中心频点的1.4MHz中，而主信息块(MIB，Master Information Block)是在这1.4MHz上传输的，因此，仅支持Band B的终端UE2尝试接入小区Cell_1时，虽然可正常完成下行同步并读取MIB，但MIB中指示小区Cell_1系统带宽为20M，UE2会判断自身能力不支持这一系统带宽，而无法正常接入小区Cell_1进行业务。
发明内容
本发明要解决的技术问题是提供一种将不同通信终端接入同一小区的方法、基站和终端，解决现有技术中，不同的通信终端由于支持不同的工作频段导致其中的某些通信终端无法接入小区的缺陷。
为解决上述技术问题，本发明的实施例提供一种将不同通信终端接入同一小区的方法，应用于演进型基站eNB，所述方法包括：获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；选择一个沿着小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值；通过第一系统广播消息广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息SIB，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的SIB。
所述的方法中，选择一个沿着所述小区的中心频点对称的系统监听带宽包括：第一通信终端支持的第一工作频段的第一系统带宽，大于第二通信终端支持的第二工作频段的第二系统带宽，第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布，则系统监听带宽是所述第二系统带宽的带宽值。
所述的方法中，通过第一系统广播消息广播所述系统监听带宽包括：在主信息块消息数据结构中修改第一参数，所述第一参数记录了小区支持的所述系统监听带宽，广播所述主信息块作为所述第一系统广播消息。
所述的方法中，在所述系统监听带宽内广播SIB之前包括：在小区广播的所述SIB中增加信元结构，在所述信元结构中指示该小区支持的各种工作频段及各种工作频段对应的系统带宽。
所述的方法中，还包括：eNB根据各通信终端上报的工作频段，在该通信终端支持的工作频段的系统带宽内为该通信终端调度频域资源。
所述的方法中，在该通信终端支持的工作频段的系统带宽内给为通信终端调度频域资源包括：对于第一通信终端，在信元结构中通知第一通信终端在对应的第一系统带宽内监测eNB下发的频域资源调度信息，以及进行上下行业务，第一系统带宽位于所述第一工作频段的带宽范围内，且位于所述小区支持的带宽范围内；对于第二通信终端，在信元结构中通知第二通信终端在对应的第二系统带宽内监测eNB下发的频域资源调度信息，以及进行上下行业务，第二系统带宽位于所述第二工作频段的带宽范围内，且位于所述小区支持的带宽范围内。
一种将不同通信终端接入同一小区的装置，应用于演进型基站eNB，包括：工作频段获取单元，设置为获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；带宽设置单元，设置为选择一个沿着小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段
和第二工作频段中的带宽最小值；主信息块及系统信息单元，设置为通过第一系统广播消息广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息SIB，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的SIB。
所述的装置中，带宽设置单元包括：系统监听带宽设置模块，设置为当第一通信终端支持的第一工作频段的第一系统带宽，大于第二通信终端支持的第二工作频段的第二系统带宽，且第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布时，则设置系统监听带宽是所述第二系统带宽的带宽值。
所述的装置中，主信息块及系统信息单元包括：系统监听带宽设置模块，设置为在主信息块消息数据结构中修改第一参数，所述第一参数记录了小区支持的所述系统监听带宽。
所述的装置中，主信息块及系统信息单元包括：系统信息信元结构模块，设置为在小区广播的所述SIB中增加信元结构，在所述信元结构中指示该小区支持的各种工作频段及各种工作频段对应的系统带宽。
一种通信终端，包括：系统监听带宽获取单元，设置为监听演进型基站eNB通过第一系统广播消息广播的系统监听带宽；所述系统监听带宽是eNB获取自身待支持的第一工作频段与第二工作频段之后，选择一个沿着小区的中心频点对称的，且不大于第一工作频段和第二工作频段中的带宽最小值；系统信息监听单元，设置为在获取所述系统监听带宽后，在所述系统监听带宽内监听获取用于接入所述小区的广播系统信息SIB。
本发明的上述技术方案的有益效果如下：在演进型基站eNB中引入在同一小区中支持不同工作频段和不同系统带宽的策略，使得支持不同工作频段的通信终端均能接入同一小区。
图1表示一种将不同通信终端接入同一小区的方法的流程示意图；
图2表示第一工作频段与第二工作频段关系示意图；
图3表示支持不同工作频段的通信终端均能接入同一LTE小区的流程示意图；
图4表示一种将不同通信终端接入同一小区的装置结构示意图。
为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
一个小区具有小区的一个中心频点，小区支持一个至多个频段，频段具有其对应的系统带宽。例如，对于时分双工(TDD，Time Division Duplexing)的2.1GHz频段，假设小区的中心频点是2100MHz，系统带宽为20MHz；那么这个小区的工作频段为2090～2110MHz，中心频点2100MHz位于工作频段的中心。在这20MHz的带宽中又会频分出许多个子频点(子载波)，这些子频点是以15kHz为间隔的，共划分出1200个子频点，15kHz*1200＝18MHz，还剩下2MHz作为保护带宽。
相邻小区可以和这个小区同中心频点，也可以不同。如果是同中心频点，LTE有小区间干扰协调技术来控制边缘处的小区间干扰；如果是不同中心频点，中心频点之间的差距至少是20MHz，不会有频率上的重叠。现有LTE中，小区的带宽有1.4MHz、3MHz、5MHz、10MHz、15MHz和20MHz等几种。
本发明实施例提供一种将不同通信终端接入同一小区的方法，应用于演进型基站eNB，如图1所示，至少两个通信终端，第一通信终端支持的第一工作频段与第二通信终端支持的第二工作频段不同；
方法包括：
步骤101，获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；
步骤102，选择一个沿着小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值；
步骤103，通过第一系统广播消息-主信息块(MIB，Master Information Block)广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息(SIB，System Information Blocks)，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的系统信息SIB。
应用所提供的技术，在eNB中引入在同一小区中支持不同工作频段Band和不同系统带宽的策略，使得支持不同工作频段Band的通信终端均能接入同一LTE小区。
在一个优选实施例中，选择一个沿着所述小区的中心频点对称的系统监听带宽包括：
第一通信终端支持的第一工作频段Band A的第一系统带宽，大于第二通信终端支持的第二工作频段Band B的第二系统带宽，第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布，则系统监听带宽是所述第二系统带宽的带宽值。第一通信终端和第二通信终端通常是指LTE终端。
在一个应用场景中，如图2所示，系统监听带宽通过如下方式获得：第一通信终端支持的Band A对应系统带宽为XMHz，第二通信终端支持的Band B对应系统带宽为YMHz，两者沿小区的中心频点对称，则XMHz大于YMHz，那么通常，系统监听带宽是YMHz。这里，X＝20MHz，Y＝10MHz。
在一个优选实施例中，通过第一系统广播消息广播所述系统监听带宽包括：
在主信息块消息数据结构中修改第一参数dl-Bandwidth，所述第一参数记录了小区支持的所述系统监听带宽，广播所述主信息块作为所述第一系统广播消息。在主信息块消息数据结构中添加第一参数dl-Bandwidth，第一参数dl-Bandwidth的取值范围是n6,n15,n25,n50,n75和n100。
基于3GPP TS36331协议，在主信息块消息数据结构中添加第一参数dl-Bandwidth，第一参数dl-Bandwidth的取值范围是n6,n15,n25,n50,n75和n100，以下的粗体部分为新增信元。
eNB侧设置MIB中的第一参数dl-Bandwidth的值是系统信息SIB中新增信元结构dl-BandwidthIndicatorlist中的系统监听带宽，使得支持不同Band的通信终端均能接收到该小区的系统信息，以解决接入问题。
在一个优选实施例中，在所述系统监听带宽内广播系统信息SIB之前包括：
在小区广播的所述系统信息中增加信元结构dl-BandwidthIndicatorlist，在所述信元结构中指示该小区支持的各种工作频段及其对应的系统带宽。
系统信息具体是SIB，在LTE小区广播的系统信息SIB中增加一个信元结构dl-BandwidthIndicatorlist，在信元结构dl-BandwidthIndicatorlist中指示该LTE小区支持的各种Band及其对应的系统带宽，信元结构dl-BandwidthIndicatorlist中的内容包括参数freqBandIndicator和dl-Bandwidth。
3GPP TS36331协议中SystemInformationBlockType1消息部分数据结构，粗体部分为新增信元结构。
在一个优选实施例中，还包括：
eNB根据各通信终端上报的工作频段，在该通信终端支持的工作频段的系统带宽内给该通信终端调度频域资源。
一方面，网络侧的eNB根据UE上报的频段支持能力选择相应的系统带宽来给该UE调度上下行资源；另一方面，UE根据SIB中的信元结构dl-BandwidthIndicatorlist，在自身支持的系统带宽内监测资源调度信息，以进行上下行业务。
在一个优选实施例中，在该通信终端支持的工作频段的系统带宽内给该通信终端调度频域资源包括：
对于第一通信终端，在信元结构dl-BandwidthIndicatorlist中通知第一通信终端在对应的第一系统带宽内监测eNB下发的频域资源调度信息，进行上下行业务，第一系统带宽位于所述第一工作频段的带宽范围内，且位于所述小区支持的带宽范围内；
对于第二通信终端，在信元结构dl-BandwidthIndicatorlist中通知第二通信终端在对应的第二系统带宽内监测eNB下发的频域资源调度信息，进行上下行业务，第二系统带宽位于所述第二工作频段的带宽范围内，且位于所述小区支持的带宽范围内。
在一个应用场景中，如图3所示，支持不同工作频段的通信终端均能接入同一LTE小区的过程包括：
步骤31，在eNB端，设置一个小区同时支持频段第一工作频段Band A和第一工作频段Band B，且该小区系统带宽针对不同工作频段灵活设置，设置Band A的系统带宽为x MHz，Band B的系统带宽为Y MHz，其中Y<X，且X、YMHz均沿小区中心频点对称。
步骤32，在eNB端，设置小区主信息块MIB中第一参数dl-Bandwidth为YMHz，且在系统信息SIB的信元结构dl-BandwidthIndicatorlist中设置：Band A对应系统带宽为X MHz，Band B对应系统带宽为YMHz；
eNB端广播的信息有MIB和多个SIB，MIB包括有限个最重要、最常用的传输参数，其需要从该小区中获得其它的信息，在BCH上进行传输，SIB则是承载在SI(System Information)消息中。
步骤33，eNB在系统监听带宽上广播主信息块MIB。
步骤34，在UE端，UE完成该小区下行同步、读取小区的MIB，并根据MIB中指示的第一参数dl-Bandwidth，在YMHz带宽上监听获取小区的所有系统信息SIB。
步骤35，UE端根据系统信息SIB发起接入流程；
步骤36，在eNB端，UE接入成功后，eNB根据UE上报的Band支持能力，在该UE支持的系统带宽内给该UE调度频域资源。
即如果是支持Band A的UE接入，eNB在XMHz带宽上调度资源；如果是支持Band B的终端接入，eNB在Y MHz带宽上调度资源；
步骤37，在UE端，UE读取SIB中的信元结构dl-BandwidthIndicatorlist，并根据自身支持的工作频段，在信元结构dl-BandwidthIndicatorlist中指示的对应系统监听带宽内监听获取eNB下发的频域资源调度信息，正常进行上下行业务。LTE系统中的系统信息SIB1～SIB11各自具有的功能和携带的数据有所不同，这里的系统信息主要是指系统信息中的SIB1。
即支持Band A的UE在XMHz带宽内监测资源调度信息并进行业务；而支持BandB的UE在YMHz带宽内监测资源调度信息并进行业务。
本发明实施例提供一种将不同通信终端接入同一小区的装置，应用于eNB，如图4所示，包括：
工作频段获取单元41，设置为获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；
带宽设置单元42，设置为选择一个沿着所述小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值；
主信息块及系统信息单元43，设置为通过第一系统广播消息广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息SIB，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的系统信息SIB。
在一个优选实施例中，带宽设置单元42包括：
系统监听带宽设置模块，设置为当第一通信终端支持的第一工作频段Band A的第一系统带宽，大于第二通信终端支持的第二工作频段Band B的第二系统带宽，且第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布时，则设置系统监听带宽是所述第二系统带宽的带宽值。
在一个优选实施例中，主信息块及系统信息单元43包括：
系统监听带宽设置模块，设置为在主信息块消息数据结构中修改第一参数dl-Bandwidth，所述第一参数记录了小区支持的所述系统监听带宽。
在一个优选实施例中，主信息块及系统信息单元43包括：
系统信息信元结构模块，设置为在小区广播的所述系统信息中增加信元结构dl-BandwidthIndicatorlist，在所述信元结构中指示该小区支持的各种工作频段及各种工作频段对应的系统带宽。
本发明实施例提供一种通信终端，包括：
系统监听带宽获取单元，设置为监听演进型基站eNB通过第一系统广播消息广播的系统监听带宽；所述系统监听带宽是eNB获取自身待支持的第一工作频段与第二工作频段之后，选择的一个沿着小区的中心频点对称的带宽，且该带宽不大于所述第一工作频段和第二工作频段中的带宽最小值；
系统信息监听单元，设置为在获取所述系统监听带宽后，在所述系统监听带宽内监听获取用于接入所述小区的广播系统信息SIB。
采用本方案之后的优势是：通信终端进入多频段重叠的LTE小区后，根据小区主信息块中的第一参数判断接收系统信息的频域资源，其中dl-Bandwidth是系统信息SIB中信元结构dl-BandwidthIndicatorlist指示的最小带宽，这样可以保证不同通信终端均能收到小区的系统信息并成功发起接入。接入成功后，网络可以根据通信终端上报的工作频段和信元结构中各工作频段对应的系统带宽，在该通信终端支持的系统带宽内调度资源，可更加有效、合理的使用稀缺的频谱资源。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
如上所述，通过上述实施例及优选实施方式，在演进型基站eNB中引入在同一小区中支持不同工作频段和不同系统带宽的策略，使得支持不同工作频段的通信终端均能接入同一小区。
Claims (11)
- 一种将不同通信终端接入同一小区的方法，其特征在于，应用于演进型基站eNB，所述方法包括：获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；选择一个沿着小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值；通过第一系统广播消息广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息SIB，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的SIB。
- 根据权利要求1所述的方法，其中，选择一个沿着所述小区的中心频点对称的系统监听带宽包括：第一通信终端支持的第一工作频段的第一系统带宽，大于第二通信终端支持的第二工作频段的第二系统带宽，第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布，则系统监听带宽是所述第二系统带宽的带宽值。
- 根据权利要求1所述的方法，其中，通过第一系统广播消息广播所述系统监听带宽包括：在主信息块消息数据结构中修改第一参数，所述第一参数记录了小区支持的所述系统监听带宽，广播所述主信息块作为所述第一系统广播消息。
- 根据权利要求1所述的方法，其中，在所述系统监听带宽内广播SIB之前包括：在小区广播的所述SIB中增加信元结构，在所述信元结构中指示该小区支持的各种工作频段及各种工作频段对应的系统带宽。
- 根据权利要求4所述的方法，其中，还包括：eNB根据各通信终端上报的工作频段，在该通信终端支持的工作频段的系统带宽内为该通信终端调度频域资源。
- 根据权利要求5所述的方法，其中，在该通信终端支持的工作频段的系统带宽内给为通信终端调度频域资源包括：对于第一通信终端，在信元结构中通知第一通信终端在对应的第一系统带宽内监测eNB下发的频域资源调度信息，以及进行上下行业务，第一系统带宽位于所述第一工作频段的带宽范围内，且位于所述小区支持的带宽范围内；对于第二通信终端，在信元结构中通知第二通信终端在对应的第二系统带宽内监测eNB下发的频域资源调度信息，以及进行上下行业务，第二系统带宽位于所述第二工作频段的带宽范围内，且位于所述小区支持的带宽范围内。
- 一种将不同通信终端接入同一小区的装置，其特征在于，应用于演进型基站eNB，包括：工作频段获取单元，设置为获取所述eNB待支持的具有不同工作频段的第一通信终端和第二通信终端各自对应的第一工作频段与第二工作频段；带宽设置单元，设置为选择一个沿着小区的中心频点对称的系统监听带宽，所述系统监听带宽不大于第一工作频段和第二工作频段中的带宽最小值；主信息块及系统信息单元，设置为通过第一系统广播消息广播所述系统监听带宽，并在所述系统监听带宽内广播系统信息SIB，使得监听到所述第一系统广播消息的第一通信终端和第二通信终端能够在获取所述系统监听带宽后，在所述系统监听带宽上监听获取用于接入所述小区的SIB。
- 根据权利要求7所述的装置，其中，带宽设置单元包括：系统监听带宽设置模块，设置为当第一通信终端支持的第一工作频段的第一系统带宽，大于第二通信终端支持的第二工作频段的第二系统带宽，且第一系统带宽与第二系统带宽均沿着小区的中心频点对称分布时，则设置系统监听带宽是所述第二系统带宽的带宽值。
- 根据权利要求7所述的装置，其中，主信息块及系统信息单元包括：系统监听带宽设置模块，设置为在主信息块消息数据结构中修改第一参数，所述第一参数记录了小区支持的所述系统监听带宽。
- 根据权利要求7所述的装置，其中，主信息块及系统信息单元包括：系统信息信元结构模块，设置为在小区广播的所述SIB中增加信元结构，在所述信元结构中指示该小区支持的各种工作频段及各种工作频段对应的系统带宽。
- 一种通信终端，包括：系统监听带宽获取单元，设置为监听演进型基站eNB通过第一系统广播消息广播的系统监听带宽；所述系统监听带宽是eNB获取自身待支持的第一工作频段与第二工作频段之后，选择的一个沿着小区的中心频点对称的带宽，且该带宽不大于所述第一工作频段和第二工作频段中的带宽最小值；系统信息监听单元，设置为在获取所述系统监听带宽后，在所述系统监听带宽内监听获取用于接入所述小区的广播系统信息SIB。
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