WO2009143752A1 - 一种基带系统、基站和支持更软切换的处理方法 - Google Patents
一种基带系统、基站和支持更软切换的处理方法 Download PDFInfo
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- WO2009143752A1 WO2009143752A1 PCT/CN2009/071905 CN2009071905W WO2009143752A1 WO 2009143752 A1 WO2009143752 A1 WO 2009143752A1 CN 2009071905 W CN2009071905 W CN 2009071905W WO 2009143752 A1 WO2009143752 A1 WO 2009143752A1
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- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000013139 quantization Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 238000005562 fading Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to the field of wireless communication technologies, and in particular, to a technical solution for supporting softer handover.
- Handover refers to the handover of a mobile station between multiple sectors covered by a base station (NodeB)
- the mobile station maintains the link of two or more sectors of a base station at the same frequency. That is, for softer handover, the signal transmitted by the mobile station is also received by the radio unit of the adjacent sector, and then the mobile station and the base station communicate with each other through at least two different air interface channels.
- a base station After receiving the mobile station signal by the radio unit of each sector, the base station centralizes the signal of the mobile station, and combines the processed signals to improve the receiving gain, thereby ensuring communication quality.
- 1 is a schematic structural diagram of a base station of a conventional WCDMA system.
- a base station is mainly composed of a radio frequency unit, a baseband unit, and a transmission unit; wherein, the radio frequency unit is separated from the baseband unit, and is connected to the remote baseband unit through a baseband radio frequency interface. .
- the radio frequency unit is configured to send and receive communication data, and perform data interaction with the baseband unit; the baseband unit is configured to process uplink data and downlink data, including encoding and decoding data; and the transmission unit is configured to exchange data with other devices.
- the data processed by the baseband unit is transmitted to the radio network controller RNC, and the related data is received from the RNC.
- FIG. 2 The process of processing data by the existing baseband unit in a softer handover is shown in FIG. 2.
- the radio frequency unit of the Sectorl sector and the radio unit of the Sector sector respectively receive the same signal sent by the same mobile station, and then transmit the signal to the baseband unit through the baseband radio frequency interface respectively; the baseband unit separately for each radio frequency unit
- the two signals transmitted are first despread ( Figures 21 and 2) to reduce the amount of buffered data, and then the first despread data is separately channel compensated ( Figures 22 and 22') to Eliminate the effect of channel fading on the signal, and then weight combine the two channel compensated signal data (ie, maximum ratio combining Figure 23) recovering the signal energy, and according to the transmission format combination indication TFCI, the weighted combined signal is subjected to the second despreading (Fig.
- Embodiments of the present invention provide a baseband system, a base station, and a processing method for supporting softer handover, which can reduce the amount of data to be transmitted in a softer handover, and correspondingly reduce the base station product cost.
- a baseband system comprising: at least one baseband processing control unit, and a plurality of distributed baseband units coupled to the baseband processing control unit via a distributed baseband radio frequency interface;
- the distributed baseband unit configured to perform demodulation processing on a signal transmitted by a corresponding radio frequency unit, and transmit the demodulated data to the baseband processing control unit through the distributed baseband radio frequency interface;
- the baseband processing control unit is configured to perform decoding processing on the demodulated data of the distributed baseband unit.
- a base station comprising a plurality of radio frequency units, further comprising the baseband system described above.
- a method of supporting softer handoffs including:
- each distributed baseband unit demodulates the signal data transmitted by the corresponding radio frequency unit, and transmits the demodulated data to the baseband processing control unit through the distributed baseband radio frequency interface;
- the baseband processing control unit performs decoding processing on the demodulated data of the distributed baseband unit
- the baseband system is divided into two parts: at least one baseband processing control unit and a plurality of distributed baseband units, so that the distributed baseband unit
- the baseband processing control unit can perform demodulation processing on the terminal signal received by the corresponding radio frequency unit, and the baseband processing control unit performs decoding processing on the demodulated data, for example, softer handover, demodulating and processing each distributed baseband unit.
- the same signal from the same mobile station in the data is combined and decoded. This makes the baseband demodulation processing of each sector independent of each other, and also makes the base station architecture more flexible.
- the distributed baseband unit of each sector can be integrated into the radio unit of the sector, thereby reducing the data of the processing data ⁇ base station.
- the traffic also reduces the requirements for the interface between the radio unit and the baseband unit, and correspondingly greatly reduces the complexity of the base station system.
- FIG. 1 is a schematic structural diagram of a base station of the background art
- FIG. 2 is a schematic diagram of a processing principle of a baseband unit of the background art
- FIG. 3 is a schematic structural diagram of a baseband system according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of a demodulation processing principle according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a processing principle of a baseband system supporting softer handover according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- FIG. 7 is a flowchart of a processing method for supporting softer handover according to an embodiment of the present invention.
- a baseband system is provided.
- the specific implementation structure is as shown in FIG. 3, and may include: at least one baseband processing control unit 31, and a plurality of distributed baseband radio frequency interfaces and remote ends.
- a distributed baseband unit connected to the baseband processing control unit, such as 32 and 33;
- a distributed baseband unit such as 32: for demodulating a signal transmitted by a radio frequency unit, and transmitting the demodulated data to a baseband processing control unit through a distributed baseband radio frequency interface; specifically, demodulation processing
- the method may include: performing channel compensation after the first despreading of the signal data, performing a second despreading on the channel compensated data according to the transport format combination indication TFCI, and performing the second despreading after the second despreading Data is subjected to maximum ratio combining and quantification;
- each sector may be placed with at least one radio frequency unit and one distributed baseband unit; when one mobile station moves to an area covered by multiple sectors overlapping
- the radio units of the plurality of sectors receive the same signal sent by the mobile station, and the radio unit of each sector transmits the mobile station signal to the distributed baseband of its own sector.
- the distributed baseband unit of each sector separately performs demodulation processing on the mobile station signal; the demodulation processing principle is as shown in FIG.
- the distributed baseband unit transmits the quantized data to the baseband processing control unit 31 through the distributed baseband radio frequency interface;
- the baseband processing control unit 31 is configured to: perform decoding processing on the demodulated data of the distributed baseband unit, and specifically include: decoding data after demodulation processing of the distributed baseband unit; or Decoding the same signal data from the same mobile station in the demodulated data of the distributed baseband unit, and decoding the combined data;
- the baseband processing control unit demodulates each distributed baseband unit.
- the same signal data from the same mobile station is combined in the processed data (softer switching of the same signal data can also be called soft value, which is to combine the soft values of adjacent sectors), and then sent to decode
- the device performs decoding, and then performs subsequent processing on the decoded data.
- the functions implemented by the baseband system provided by the embodiments of the present invention include the functions implemented by the baseband unit of the base station in the background art.
- the terminal in the embodiment of the present invention includes a mobile station.
- the distributed baseband radio frequency interface in the embodiment of the present invention is an interface for the baseband processing control unit 31 and the distributed baseband unit 32 to be communicatively connected, since the interface mainly transmits the distributed baseband unit 32 for demodulation.
- the processed data traffic is therefore much less than the transmission amount of the baseband radio frequency interface in the background art. That is to say, the requirements for the distributed baseband radio frequency interface in the embodiment of the present invention are far less than the baseband in the background art. The requirements of the RF interface are high.
- the maximum ratio combining of the signal data can be independently performed by each distributed baseband unit (rather than being together as in the background art) The maximum number of signal data is combined with).
- the demodulation of the data is subjected to distributed processing, and the softer handover combining and decoding of the data is centralized, thereby reducing the radio frequency unit of the base station. The amount of data between the baseband units also greatly reduces the complexity of the base station.
- the distributed baseband unit of each sector can be integrated with the radio unit of the sector in which it is located or placed in the same device.
- the baseband system of the embodiment of the present invention includes a distributed demodulation processing portion (a plurality of distributed baseband units) and a centralized decoding portion (at least one baseband processing control unit), which implements data
- the demodulation captures the distributed processing, and the decoding of the data, or the softer handover combining and decoding, is centralized processing, thereby reducing the interface requirement between the radio unit and the baseband unit, that is, the low-speed interface can satisfy the baseband unit.
- the requirement to interface with the radio unit does not require the extremely high bandwidth of the interface between the radio unit and the baseband unit to support data transmission as in the background art.
- the distributed baseband unit may be separated from the base station body and distributed to each sector covered by the base station (for example, the distributed baseband unit of each sector and the radio frequency of the sector in which it is located)
- the unit is integrated or integrated in the same device, so that the distributed baseband unit is remotely connected to the baseband processing control unit through the distributed baseband radio interface; and the demodulated data is transmitted through the distributed baseband unit through the distributed baseband radio interface.
- the embodiment of the present invention can also greatly reduce the amount of data that needs to be transmitted between the radio frequency unit and the baseband unit.
- the baseband system can be split into the radio frequency unit and the transmission unit, so that the base station product can be a combination of the radio frequency unit and the transmission unit, and such a configuration can make the network expansion more convenient.
- FIG. 5 is a schematic diagram of a processing principle of a baseband system supporting a softer handover according to an embodiment of the present invention.
- the embodiment of the present invention is described in detail below with reference to FIG. 5.
- it includes: a distributed baseband unit #1 and a distributed baseband unit #2, and a baseband processing control unit; for example, when the mobile station is in an overlapping area of sector 1 and sector 2, sector 1
- the radio frequency unit and the radio frequency unit of the adjacent sector 2 receive the same signal of the mobile station, and the distributed baseband unit #1 of the sector 1 starts to perform demodulation processing after receiving the mobile station signal transmitted by the radio frequency unit.
- the distributed baseband unit #2 of sector 2 also starts to the mobile station.
- the signal is demodulated;
- the demodulation processing of the mobile station signal by the distributed baseband unit #1 of the sector 1 includes: performing the first despreading 51 on the signal data to reduce the amount of buffered data, and then despreading for the first time.
- the data is subjected to channel compensation 52 to eliminate the influence of channel fading on the signal, and then according to the transmission format combination indication TFCI, the channel-compensated data is despreaded a second time 53 to realize demodulation of the data, and then for the second time.
- the despread data is subjected to maximum ratio combining 54 to recover the signal energy, and then the maximum ratio combined data is quantized 55 to reduce the number of transmitted bits, and then the quantized data is transmitted to the baseband through the distributed baseband radio frequency interface.
- Processing control unit since the demodulation processing of the mobile station signal by the distributed baseband unit #2 (shown by 5 ⁇ 55' in the figure) is the same as that of the distributed baseband unit #1 described above, it is not repeated here.
- the baseband processing control unit After receiving the demodulated data of the distributed baseband unit #1 and the distributed baseband unit #2, the baseband processing control unit combines the data of the same signal from the same terminal, in other words, That is, the same signal data of the same user received by each sector is combined 56, wherein the softer switching of the same signal data can also be referred to as a soft value; the soft values of the sectors are combined and improved.
- the signal of the gain is then sent to the decoder for decoding 57, and then the subsequent processing is performed.
- the distributed baseband unit demodulates the signal transmitted by the radio frequency unit, and the baseband processing control unit concentrates on the demodulation process.
- the data is decoded to enable the distributed baseband unit to transmit data to the baseband processing control unit, which can be implemented through a low-speed interface distributed baseband radio frequency interface, without having to have high transmission bandwidth requirements for the interface as in the background art.
- the baseband processing control unit may decode and process the demodulated data of each distributed baseband unit according to a specific situation, thereby implementing distributed processing of demodulation and decoding the demodulated data. Then take centralized processing.
- An embodiment of the present invention further provides a base station, including multiple radio frequency units, a transmission unit, and the foregoing baseband system.
- Each of the distributed baseband units in the baseband system may be integrated with the corresponding radio frequency unit or disposed in the same device.
- the implementation structure of the base station may be as shown in FIG. 6, including: multiple distributed baseband units and corresponding radio frequency units integrated or disposed in the same device.
- 61, baseband processing control unit 62, transmission unit 63 wherein, the distributed baseband unit integrated or disposed in the same device and the corresponding radio frequency unit, for example, 61, and the remote baseband processing control unit 62 are connected through a distributed baseband radio frequency interface;
- the processing is performed, and the demodulated data is transmitted to the baseband processing control unit through the distributed baseband radio frequency interface; the demodulation processing may include: performing channel compensation after the first despreading of the signal data, according to the transmission
- the format combination indicates that the TFCI decodes and performs the second despreading on the channel compensated data, and performs maximum ratio combining and quantization on the second despread data;
- the baseband processing control unit 62 is configured to perform decoding processing on the demodulated data of the distributed baseband unit. Specifically, the method may include: decoding, by using the demodulated data of the distributed baseband unit; Decoding the same signal data from the same terminal in the demodulated data of the distributed baseband unit, and decoding the combined data;
- the transmission unit 63 is configured to transmit the processed data of the baseband processing control unit 62 to another device, such as an RNC, or receive related data.
- the baseband system and the base station provided by the foregoing embodiments of the present invention may be applied to softer handover, but are not limited to application to softer handover.
- the embodiment of the present invention further provides a corresponding processing method for supporting softer handover, which may specifically separate the baseband system into at least one baseband processing control unit, and multiple distributed baseband radio frequency interfaces and remote locations.
- a distributed baseband unit connected to the baseband processing control unit; the distributed baseband unit demodulates signal data transmitted by the corresponding radio frequency unit, and transmits the demodulated data to the baseband through a distributed baseband radio frequency interface Processing control unit; the baseband processing control unit performs decoding processing on the data demodulated by the distributed baseband unit.
- the distributed baseband unit may be integrated with the corresponding radio frequency unit or disposed in the same device; and the distributed baseband radio frequency interface between the distributed baseband unit and the baseband processing control unit may be Low speed interface.
- FIG. 7 is a flowchart of a processing method for supporting softer handover according to an embodiment of the present invention. As shown in FIG. 7, the processing method includes the following steps:
- Step 71 The distributed baseband unit performs demodulation processing on the signal data transmitted by the corresponding radio frequency unit.
- the demodulation processing may include: performing despreading of the signal data transmitted by the corresponding radio frequency unit for the first time Channel compensation, performing a second despreading on the channel compensated data according to the transport format combination indication TFCI, and performing maximum ratio combining and quantization on the second despread data;
- each sector is placed with at least one radio frequency unit and one distributed baseband unit, and the radio frequency unit of each sector is integrated with the distributed baseband unit;
- a mobile station moves to an area covered by a plurality of sectors, and the radio units of the plurality of sectors receive the same signal sent by the mobile station, and the radio unit of the plurality of sectors moves the mobile station
- the signal is transmitted to the distributed baseband unit of the own sector; the distributed baseband unit of each sector separately demodulates the signal of the mobile station, and the demodulation processing principle is shown in FIG. 4, which is not repeated here;
- Step 72 Each distributed baseband unit transmits the demodulated data to the baseband processing control unit through the distributed baseband radio frequency interface; the distributed baseband unit can be demodulated and processed through the low-speed distributed baseband radio frequency interface. Signal data is transmitted to the baseband processing control unit;
- Step 73 The baseband processing control unit performs decoding processing on the demodulated data of the distributed baseband unit.
- the method may include: decoding data after demodulation processing of each distributed baseband unit; or the baseband processing control unit The same signal data from the same mobile station in the demodulated data of the distributed baseband unit is combined, and the combined data is decoded;
- the baseband processing control unit demodulates each distributed baseband unit.
- the same signal data from the same terminal in the processed data is merged (that is, the soft values of the adjacent sectors are combined), and then sent to the decoder for decoding, so as to transmit the decoded data to the RN C.
- each distributed baseband unit and the corresponding radio unit can be integrated or disposed in the same device; that is, the distributed baseband subunit of each sector can be integrated with the radio unit of the same sector. In one or set in the same device.
- the embodiment of the present invention divides the baseband unit into a distributed demodulation processing portion (a plurality of distributed baseband units) and a centralized processing part (at least one baseband processing control unit), which implements demodulation of data and performs distributed processing, and performs softer switching combining and decoding of data to perform centralized processing, thereby realizing Reduce the interface requirements of the RF unit and the baseband unit, that is, the low-speed interface can meet the requirements of the baseband RF interface.
- a distributed demodulation processing portion a plurality of distributed baseband units
- a centralized processing part at least one baseband processing control unit
- the distributed baseband unit demodulates the signal transmitted by the radio frequency unit, and
- the baseband processing control unit concentrates on decoding and demodulating the data, and causes the distributed baseband unit to transmit data to the remote baseband processing control unit, which can be realized through a low-speed distributed baseband radio frequency interface, without having to be like a background.
- the technology has a high transmission bandwidth requirement for the baseband radio frequency interface between the radio frequency unit and the baseband unit. Therefore, the implementation of the present invention can reduce the amount of data transmitted by the base station in a softer handover, and also greatly reduce the complexity of the base station.
- the distributed baseband unit demodulates the signal data transmitted by the corresponding radio frequency unit, and transmits the demodulated data to the remote baseband processing control unit through the distributed baseband radio frequency interface;
- the baseband processing control unit performs decoding processing on the demodulated data of the distributed baseband unit
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Description
一种基带系统、 基站和支持更软切换的处理方法
[1] 本申请要求于 2008年 05月 28日提交中国专利局、 申请号为 200810113235.6、 发 明名称为"一种基带系统、 基站和支持更软切换的处理方法"的中国专利申请的优 先权， 其全部内容通过引用结合在本申请中。
[2] 技术领域
[3] 本发明涉及无线通信技术领域， 尤其涉及支持更软切换的技术方案。
[4] 发明背景
[5] 在无线通信系统中， 更软切换 （Softer
Handover) 是指： 移动台在一个基站 （NodeB) 覆盖的多个扇区之间进行的切换
， 在更软切换吋移动台以同一个频率同吋保持在一个基站的两个或两个以上扇 区的链路。 即进行更软切换吋移动台发送的信号也会被相邻扇区的射频单元收 到， 此吋移动台和基站会同吋通过至少两个不同的空中接口信道通信
区至少有一个） 。 基站通过各扇区的射频单元收到该移动台信号后， 对该移动 台信号集中处理， 并将这些处理后的信号合并以提高接收增益， 从而保证通信 质量。 图 1是现有 WCDMA系统的基站结构示意图， 图 1中， 基站主要由射频单元 、 基带单元、 传输单元组成； 其中， 射频单元与基带单元分离， 且通过基带射 频接口与远端的基带单元连接。 具体的， 射频单元用于收发通信数据， 并与基 带单元进行数据交互； 基带单元用于对上行数据、 下行数据进行处理， 包括对 数据进行编解码处理； 传输单元用于与其它设备交互数据， 例如发送基带单元 处理后的数据给无线网络控制器 RNC、 并从 RNC接收相关数据。
现有基带单元在更软切换吋处理数据的过程如图 2所示。 图 2中， Sectorl扇区的 射频单元和 Sector扇区的射频单元分别收到同一个移动台发送的同一信号后， 分别通过基带射频接口将该信号传输给基带单元； 基带单元分别对各射频单元 传输的上述两路信号进行第一次解扩 （图示 21和 2Γ) ， 以减少缓存数据量， 接 着分别对第一次解扩后的数据进行信道补偿 （图示 22和 22') ， 以消除信道衰落 对信号的影响， 然后把两路经过信道补偿的信号数据加权合并 （即最大比合并
， 图示 23) 以恢复信号能量， 并根据传输格式组合指示 TFCI对该加权合并后的 信号进行第 2次解扩 （图示 24) 以完成对数据的解调； 然后对第 2次解扩后的数 据进行量化 （图示 25) ， 以减少传输的比特数， 降低对接口和硬件的要求， 最 后将量化后的数据送入解码器进行解码 （图示 26) ， 以便于将解码处理后的用 户数据发送到 RNC。
[7] 发明人在实现本发明的创造过程中， 发现现有技术中至少存在如下问题：
[8] 在现有 WCDMA系统中对基带射频接口的带宽有很高的要求， 例如一个 5M载 频在上行传输吋就需要 200M以上的带宽， 当基站为多个移动台同吋进行更软切 换吋， 多个射频单元就要通过基带射频接口向基带单元传输相应的多路信号， 这要求基站的基带射频接口必须有极高的带宽来支持更软切换， 而高带宽基站 系统的复杂度很高， 且成本也很高。
[9] 发明内容
[10] 本发明的实施例提供了一种基带系统、 基站和支持更软切换的处理方法， 可以 在更软切换吋减少需要传输的数据量， 相应的也可以降低基站产品成本。
[11] 一种基带系统， 包括： 至少一个基带处理控制单元， 以及多个通过分布式基带 射频接口与所述基带处理控制单元连接的分布式基带单元；
[12] 所述分布式基带单元： 用于对相应射频单元传输的信号进行解调处理， 并通过 所述分布式基带射频接口将解调处理后的数据传输给所述基带处理控制单元； [13] 所述基带处理控制单元， 用于对所述分布式基带单元解调处理后的数据进行解 码处理。
[14] 一种基站， 包括多个射频单元， 还包括上述基带系统。
[15] —种支持更软切换的处理方法， 包括：
[16] 各分布式基带单元对相应射频单元传输的信号数据进行解调处理， 并通过分布 式基带射频接口将解调处理后的数据传输给基带处理控制单元；
[17] 所述基带处理控制单元对所述分布式基带单元解调处理后的数据进行解码处理
[18] 从上述本发明的实施例提供的技术方案可以看出， 由于将基带系统分成了两部 分： 至少一个基带处理控制单元和多个分布式基带单元， 使得分布式基带单元
能够独立的对相应射频单元收到的终端信号进行解调处理， 而基带处理控制单 元则集中对解调处理后的数据进行解码处理， 例如更软切换吋将各分布式基带 单元解调处理后的数据中的来自同一个移动台的同一信号合并、 解码。 这使得 各扇区的基带解调处理相互独立， 也使得基站架构更加灵活， 例如可以将各扇 区的分布式基带单元集成到所在扇区的射频单元中， 从而降低了处理数据吋基 站的数据流量， 也降低了对射频单元与基带单元之间接口的要求， 相应的也大 大降低了基站系统的复杂度。
[19] 附图简要说明
[20] 图 1为背景技术的基站结构示意图；
[21] 图 2为背景技术的基带单元处理原理示意图；
[22] 图 3为本发明实施例提供的基带系统结构示意图；
[23] 图 4为本发明实施例提供的解调处理原理示意图；
[24] 图 5为本发明实施例提供的基带系统支持更软切换的处理原理示意图；
[25] 图 6是本发明实施例提供的基站结构示意图；
[26] 图 7为本发明实施例提供的支持更软切换的处理方法流程图。
[27] 实施本发明的方式
[28] 在本发明实施例中， 提供一种基带系统， 具体实现结构如图 3所示， 可以包括 ： 至少一个基带处理控制单元 31， 以及多个通过分布式基带射频接口与远端的 所述基带处理控制单元连接的分布式基带单元， 如 32和 33等； 其中，
[29] 分布式基带单元例如 32: 用于对射频单元传输的信号进行解调处理， 并将解调 处理后的数据通过分布式基带射频接口传输给基带处理控制单元； 具体的， 解 调处理可以包括： 对所述信号数据第一次解扩后进行信道补偿， 根据传输格式 组合指示 TFCI对所述信道补偿后的数据进行第二次解扩， 并对所述第二次解扩 后的数据进行最大比合并与量化；
[30] 例如， 在一个基站覆盖的多个扇区中， 每个扇区都可以放置有至少一个射频单 元和一个分布式基带单元； 当一个移动台移动到多个扇区重叠覆盖的区域进行 更软切换吋， 上述多个扇区的射频单元都会收到该移动台发送的同一信号， 这 吋， 上述各扇区的射频单元就将该移动台信号传输给自身扇区的分布式基带单
元； 各扇区的分布式基带单元分别对该移动台信号进行解调处理； 解调处理原 理如图 4所示， 可以包括： 对所在扇区的射频单元传输的信号数据进行第一次解 扩 41， 以减少缓存数据量， 接着对第一次解扩后的数据进行信道补偿 42， 以消 除信道衰落对信号的影响， 再根据传输格式组合指示 TFCI对信道补偿后的数据 进行第二次解扩 43， 以实现对数据的解调， 接着对第二次解扩后的数据进行最 大比合并 44， 即多径接收合并以恢复信号能量， 然后对最大比合并后的数据进 行量化 45， 以减少传输的比特数； 然后分布式基带单元通过分布式基带射频接 口将量化后的数据传输给基带处理控制单元 31；
[31] 基带处理控制单元 31， 用于对所述分布式基带单元解调处理后的数据进行解码 处理， 具体可以包括： 对分布式基带单元解调处理后的数据进行解码； 或者将 各所述分布式基带单元解调处理后的数据中的来自同一移动台的同一信号数据 合并， 并对该合并后的数据解码；
[32] 例如， 基站覆盖的各扇区中的分布式基带单元将解调处理后的数据通过分布式 基带射频接口传输给基带处理控制单元后， 基带处理控制单元将各分布式基带 单元解调处理后的数据中来自同一移动台的同一信号数据合并 （更软切换吋同 一信号的数据也可以称为软值， 此吋也就是将各相邻扇区的软值合并） ， 然后 送入解码器进行解码， 接着对解码后的数据进行后续处理。
[33] 由上述本发明的实施例提供的技术方案可以看出， 本发明实施例提供的基带系 统实现的功能包括了背景技术中基站的基带单元实现的功能。 本发明实施例中 的终端， 包括移动台。
[34] 从上述描述可以看出， 本发明实施例中的分布式基带射频接口是基带处理控制 单元 31和分布式基带单元 32通信连接的接口， 由于该接口主要传输分布式基带 单元 32解调处理后的数据流量， 因此该接口的传输量较背景技术中的基带射频 接口的传输量少很多， 也就是说， 本发明实施例中对分布式基带射频接口的要 求远没有背景技术中对基带射频接口的要求高。 而且， 本发明实施例中， 由于 将数据解调处理环节设置在分布式基带单元中进行， 使得对信号数据最大比合 并可以由各分布式基带单元独立完成 （而不是像背景技术中一起将多个信号数 据最大比合并） 。
[35] 可以看出， 由于 WCDMA系统的更软切换功能需要基带单元能够对来自两个或 者两个以上扇区的信号进行更软合并， 背景技术中将不同扇区的基带信号集中 处理会使基带处理和基站的复杂度大大提高； 而在本发明实施例中， 对数据的 解调釆取分布式处理， 对数据的更软切换合并和解码釆取集中处理， 从而可以 降低基站射频单元与基带单元之间的数据量， 也极大地降低了基站的复杂度。
[36] 具体应用中， 各扇区的分布式基带单元可以与所在扇区的射频单元集成于一体 或设置在同一设备中。
[37] 从上述描述可以看出， 本发明实施例的基带系统包括分布式解调处理部分 （多 个分布式基带单元） 和集中解码部分 （至少一个基带处理控制单元） ， 实现了 对数据的解调釆取分布式处理， 而对数据的解码， 或更软切换合并和解码则釆 取集中处理， 从而实现降低对射频单元与基带单元之间的接口要求， 即低速接 口就可以满足基带单元与射频单元接口的要求， 而无须像背景技术中需要射频 单元与基带单元之间的接口有极高的带宽支持数据传输。 也就是说， 在本发明 实施例中， 可以将分布式基带单元从基站主体中分离出来， 下放到基站覆盖的 各扇区中 （例如， 各扇区的分布式基带单元与所在扇区的射频单元集成于一体 或设置在同一设备中） ， 使分布式基带单元通过分布式基带射频接口与基带处 理控制单元远程连接； 在分布式基带单元通过分布式基带射频接口将解调处理 后的数据传输给远端的基带处理控制单元吋， 就不需要像背景技术中传输大量 的高带宽的数字天线数据到基站主设备。 因此， 本发明实施例也可以实现极大 的降低射频单元与基带单元之间需要传输的数据量。 同吋通过本发明实施例可 以将基带系统拆分到射频单元和传输单元中， 使基站产品可以成为射频单元和 传输单元的组合， 这样的配置会使网络扩容更加便利。
[38] 图 5是本发明实施例提供的基带系统支持更软切换的处理原理示意图， 下面结 合图 5对本发明实施例进行详细描述。 如图 5中所示， 包括： 分布式基带单元 #1 和分布式基带单元 #2， 以及基带处理控制单元； 例如， 当移动台处于扇区 1和扇 区 2的重叠区域吋， 扇区 1的射频单元和相邻的扇区 2的射频单元均收到了该移动 台的同一信号， 扇区 1的分布式基带单元 #1收到射频单元传输的该移动台信号后 便开始进行解调处理， 与此同吋， 扇区 2的分布式基带单元 #2也开始对该移动台
信号进行解调处理；
[39] 扇区 1的分布式基带单元 #1对该移动台信号的解调处理包括： 对该信号数据进 行第一次解扩 51， 以减少缓存数据量， 接着对第一次解扩后的数据进行信道补 偿 52， 以消除信道衰落对信号的影响， 再根据传输格式组合指示 TFCI对信道补 偿后的数据进行第二次解扩 53， 以实现对数据的解调， 接着对第二次解扩后的 数据进行最大比合并 54， 以恢复信号能量， 然后对最大比合并后的数据进行量 化 55， 以减少传输的比特数， 接着将量化后的数据通过分布式基带射频接口传 输给基带处理控制单元； 由于分布式基带单元 #2对该移动台信号的解调处理 （ 图中用 5Γ〜55'示出） 与上述分布式基带单元 #1的处理原理相同， 在此不再重复
[40] 基带处理控制单元分别收到分布式基带单元 #1和分布式基带单元 #2解调处理后 的数据后， 将其中来自同一个终端的同一信号的数据进行合并， 换句话说， 也 就是将各扇区收到的同一用户的同一信号数据进行合并 56， 其中， 在此更软切 换吋同一信号的数据也可以称为软值； 在将各扇区的软值合并后得到提高了增 益的信号， 接着将该合并后的数据送入解码器进行解码 57， 然后进行后续处理 5 8。
[41] 从上述描述可以看出， 本发明实施例在进行更软切换吋， 由分布式基带单元对 射频单元传输的信号进行解调处理， 而基带处理控制单元则集中对解调处理后 的数据进行解码处理， 使分布式基带单元传输数据给基带处理控制单元吋通过 低速的接口分布式基带射频接口就可以实现， 而不必像背景技术那样对接口有 高传输带宽的要求。 当然， 本发明实施例除了可以支持更软切换， 还可以应用 于其它数据处理。 在进行其他数据处理吋， 基带处理控制单元根据具体情况可 以对各分布式基带单元解调处理后的数据进行解码处理， 从而实现对解调的分 布式处理， 而对解调处理后的数据解码则釆取集中处理。
[42] 本发明实施例还提供了一种基站， 包括多个射频单元， 传输单元， 以及上述基 带系统。 其中， 基带系统中的各分布式基带单元可以与相应的所述射频单元集 成于一体， 或设置于同一设备中。 具体的， 该基站的实现结构可以如图 6所示， 包括： 多个集成于一体或设置于同一设备中的分布式基带单元与相应射频单元
， 例如 61， 基带处理控制单元 62， 传输单元 63。 其中， 集成于一体或设置于同 一设备中的分布式基带单元与相应射频单元， 例如 61， 与远端的基带处理控制 单元 62通过分布式基带射频接口连接；
[43] 集成于一体或设置于同一设备中的分布式基带单元与相应射频单元 61中， 射频 单元用于收发通信数据； 其中的分布式基带单元用于对相应的射频单元传输的 信号进行解调处理， 并将解调处理后的数据通过分布式基带射频接口传输给基 带处理控制单元； 所述解调处理具体可以包括： 对所述信号数据第一次解扩后 进行信道补偿， 根据传输格式组合指示 TFCI对所述信道补偿后的数据进行解码 和第二次解扩， 并对所述第二次解扩后的数据进行最大比合并与量化；
[44] 基带处理控制单元 62， 用于对所述分布式基带单元解调处理后的数据进行解码 处理； 具体可以包括： 对所述分布式基带单元解调后的数据进行解码； 或者将 所述分布式基带单元解调后的数据中的来自同一终端的同一信号数据合并， 并 对该合并后的数据解码；
[45] 传输单元 63， 用于将所述基带处理控制单元 62处理后的数据传输至其它设备， 例如 RNC, 或接收相关数据。
[46] 上述本发明实施例提供的基带系统和基站可以应用于更软切换， 但不限于应用 于更软切换。
[47] 本发明实施例还提供了相应的一种支持更软切换的处理方法， 具体可以将基带 系统分离为至少一个基带处理控制单元， 以及多个通过分布式基带射频接口与 远端的所述基带处理控制单元连接的分布式基带单元； 所述分布式基带单元对 相应射频单元传输的信号数据进行解调处理， 并将解调处理后的数据通过分布 式基带射频接口传输给所述基带处理控制单元； 所述基带处理控制单元对所述 分布式基带单元解调处理后的数据进行解码处理。
[48] 其中， 所述分布式基带单元可以与相应射频单元集成于一体或设置在同一设备 中； 且所述分布式基带单元与所述基带处理控制单元之间的分布式基带射频接 口可以是低速接口。
[49] 为便于对本发明实施例的理解， 下面将结合附图对本发明实施例的具体实现方 案进行详细的描述。
[50] 图 7是本发明实施例提供的支持更软切换的处理方法流程图， 如图 7中所示， 处 理方法包括如下步骤：
[51] 步骤 71 : 各分布式基带单元对相应射频单元传输的信号数据进行解调处理； 具 体的， 所述解调处理可以包括： 对相应射频单元传输的信号数据第一次解扩后 进行信道补偿， 根据传输格式组合指示 TFCI对所述信道补偿后的数据进行第二 次解扩， 并对所述第二次解扩后的数据进行最大比合并与量化；
[52] 例如， 在一个基站覆盖的多个扇区中， 每个扇区都放置有至少一个射频单元和 一个分布式基带单元， 且各扇区的射频单元和分布式基带单元集成一体； 当一 个移动台移动到多个扇区重叠覆盖的区域吋， 上述多个扇区的射频单元都会收 到该移动台发送的同一信号， 这吋， 上述多个扇区的射频单元就将该移动台信 号传输给自身扇区的分布式基带单元； 各扇区的分布式基带单元分别对该移动 台信号进行解调处理， 解调处理原理如图 4所示， 这里不再重复；
[53] 步骤 72: 各分布式基带单元将解调处理后的数据通过分布式基带射频接口传输 给基带处理控制单元； 分布式基带单元可以通过低速的分布式基带射频接口将 解调处理后的信号数据传输给基带处理控制单元；
[54] 步骤 73: 基带处理控制单元对分布式基带单元解调处理后的数据进行解码处理 ； 具体可以包括： 对各分布式基带单元解调处理后的数据解码； 或者基带处理 控制单元将各分布式基带单元解调处理后的数据中来自同一移动台的同一信号 数据合并， 并对该合并后的数据解码；
[55] 例如， 基站覆盖的各扇区中的分布式基带单元将解调处理后的数据通过分布式 基带射频接口传输给基带处理控制单元后， 基带处理控制单元将各分布式基带 单元解调处理后的数据中来自同一终端的同一信号数据合并 （也就是将相邻扇 区的软值合并） ， 然后送入解码器进行解码， 以便于将解码后的数据传输给 RN C。
[56] 实际应用中， 各分布式基带单元与相应射频单元可以集成于一体， 或设置于同 一设备中； 也就是说， 各扇区的分布式基带子单元与同一扇区的射频单元可以 集成于一体或设置在同一设备中。
[57] 从上述描述可以看出， 本发明实施例将基带单元分成了分布式解调处理部分 （
多个分布式基带单元） 和集中处理部分 （至少一个基带处理控制单元） ， 实现 了对数据的解调釆取分布式处理， 而对数据的更软切换合并和解码釆取集中处 理， 从而实现降低对射频单元与基带单元的接口要求， 即低速接口就可以满足 基带射频接口的要求。
[58] 综上所述， 本发明各实施例和现有技术中相比， 由于本发明实施例在进行更软 切换吋， 由分布式基带单元对射频单元传输的信号进行解调处理， 而基带处理 控制单元则集中对解调处理后的数据进行解码等处理， 使分布式基带单元传输 数据给远端的基带处理控制单元吋通过低速的分布式基带射频接口就可以实现 ， 而不必像背景技术那样对射频单元与基带单元之间的基带射频接口有高传输 带宽的要求。 因此， 实施本发明可以降低基站更软切换吋传输的数据量， 也极 大地降低了基站的复杂度。
[59] 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以 通过程序来指令相关的硬件完成， 所述的程序可以存储于一种计算机可读存储 介质中， 该程序在执行吋， 包括如下步骤：
[60] 分布式基带单元对相应射频单元传输的信号数据进行解调处理， 并通过分布式 基带射频接口将解调处理后的数据传输给远端的基带处理控制单元；
[61] 上述基带处理控制单元对上述分布式基带单元解调处理后的数据进行解码处理
[62] 以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并不局限于 此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到 的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围 应该以权利要求的保护范围为准。
Claims
[1] 一种基带系统， 其特征在于， 包括：
至少一个基带处理控制单元， 以及多个通过分布式基带射频接口与所述基 带处理控制单元连接的分布式基带单元；
所述分布式基带单元： 用于对相应射频单元传输的信号进行解调处理， 并 通过所述分布式基带射频接口将解调处理后的数据传输给所述基带处理控 制单元；
所述基带处理控制单元， 用于对所述分布式基带单元解调处理后的数据进 行解码处理。
[2] 根据权利要求 1所述的系统， 其特征在于， 所述分布式基带单元对相应射频 单元传输的信号进行解调处理吋， 具体用于： 对所述信号数据第一次解扩 后进行信道补偿， 根据传输格式组合指示 TFCI对所述信道补偿后的数据进 行第二次解扩， 并对所述第二次解扩后的数据进行最大比合并与量化。
[3] 根据权利要求 1所述的系统， 其特征在于， 所述基带处理控制单元对所述分 布式基带单元解调处理后的数据进行解码处理吋， 具体用于： 对所述分布 式基带单元解调处理后的数据进行解码； 或者将所述分布式基带单元解调 处理后的数据中的来自同一终端的同一信号数据合并， 并对该合并后的数 据解码。
[4] 根据权利要求 1所述的系统， 其特征在于， 所述分布式基带单元与所述相应 射频单元集成于一体， 或设置于同一设备中。
[5] 一种基站， 包括多个射频单元， 其特征在于， 包括权利要求 1至 4任一项所 述的基带系统。
[6] 根据权利要求 5所述的基站， 其特征在于， 所述基带系统中的分布式基带单 元与相应的所述射频单元集成于一体， 或设置于同一设备中。
[7] 一种支持更软切换的处理方法， 其特征在于， 包括：
分布式基带单元对相应射频单元传输的信号数据进行解调处理， 并通过分 布式基带射频接口将解调处理后的数据传输给基带处理控制单元； 所述基带处理控制单元对所述分布式基带单元解调处理后的数据进行解码
处理。
[8] 根据权利要求 7所述的方法， 其特征在于， 所述解调处理， 包括： 对所述信 号数据第一次解扩后进行信道补偿， 根据传输格式组合指示 TFCI对所述信 道补偿后的数据进行第二次解扩， 并对所述第二次解扩后的数据进行最大 比合并与量化。
[9] 根据权利要求 7所述的方法， 其特征在于， 所述基带处理控制单元对所述分 布式基带单元解调处理后的数据进行解码处理， 包括： 对所述分布式基带 单元解调处理后的数据进行解码； 或者将所述分布式基带单元解调处理后 的数据中的来自同一终端的同一信号数据合并， 并对该合并后的数据解码
[10] 根据权利要求 7所述的方法， 其特征在于， 所述分布式基带单元与所述相应 所述射频单元集成于一体， 或设置于同一设备中。
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| WO2012103715A1 (zh) * | 2011-06-28 | 2012-08-09 | 华为技术有限公司 | 一种获得合并增益的方法和基站 |
| CN104662956B (zh) * | 2013-09-25 | 2018-10-19 | 华为技术有限公司 | 基带处理系统、基带信号处理方法和基站 |
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| CN1819676A (zh) * | 2005-03-11 | 2006-08-16 | 华为技术有限公司 | 室内基站系统 |
| US20060281464A1 (en) * | 2005-06-10 | 2006-12-14 | Samsung Electronics Co., Ltd. | Method for transmitting uplink data during handoff |
| CN101102606A (zh) * | 2007-07-20 | 2008-01-09 | 中兴通讯股份有限公司 | 一种支持网络实时优化的室内分布式系统及实现方法 |
| CN101291158A (zh) * | 2008-05-28 | 2008-10-22 | 华为技术有限公司 | 一种基带系统、基站和支持更软切换的处理方法 |
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| CN1819676A (zh) * | 2005-03-11 | 2006-08-16 | 华为技术有限公司 | 室内基站系统 |
| US20060281464A1 (en) * | 2005-06-10 | 2006-12-14 | Samsung Electronics Co., Ltd. | Method for transmitting uplink data during handoff |
| CN101102606A (zh) * | 2007-07-20 | 2008-01-09 | 中兴通讯股份有限公司 | 一种支持网络实时优化的室内分布式系统及实现方法 |
| CN101291158A (zh) * | 2008-05-28 | 2008-10-22 | 华为技术有限公司 | 一种基带系统、基站和支持更软切换的处理方法 |
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