WO2009049496A1

WO2009049496A1 - Data interaction method, device and system in a base radio station

Info

Publication number: WO2009049496A1
Application number: PCT/CN2008/001719
Authority: WO
Inventors: Haiyu Ding; Xin Ma; Peng HE; Yan Qin; Jie Su; Yongxin Chen; Zhongbin Zheng
Original assignee: China Mobile Communications Corporation; Research Institute Of Telecommunication Transmission Of Mii
Priority date: 2007-10-12
Filing date: 2008-10-10
Publication date: 2009-04-23
Also published as: CN101409667A; JP5181148B2; JP2010539828A; KR101111156B1; CN101409667B; KR20100072234A

Abstract

A data interaction method between a radio equipment control node and a radio equipment node, the data includes user data and control data, the control data includes C & Q data, a radio equipment control node transmits a downlink C & Q data to a radio equipment node in the uplink time slot of TD-SCDMA subframe; a radio equipment node transmits uplink C & Q data in the downlink time slot of TD-SCDMA subframe. A radio equipment control node, radio equipment node and radio base station system.

Description

Data interaction method, device and system in radio base station

The present invention relates to the field of communications technologies, and in particular, to a data interaction method, device, and system in a radio base station.

Background technique

In recent years, with the development of base station design techniques for wireless communication systems, radio equipment control (REC) nodes and radio equipment (RE) nodes in a radio base station tend to be physically separated. For example, the RE node can be close to the antenna, and the REC node is conveniently located. Entry. The REC node performs baseband signal processing, and each RE node converts between baseband and radio frequencies and transmits or receives information through one or more antennas. The REC node is connected to multiple remote RE nodes via separate dedicated optical links and/or electrical links. Each link transmits data from the REC node to the RE node, and transmits data from the RE node to the REC node.

The data exchanged between the REC node and the RE node includes user data and control data. Here, the user data refers to user operation data transmitted from the radio base station to the user equipment (or from the user equipment to the radio base station). The user data is transmitted in the plural form, so the user data in the plural form is also referred to as IQ data, where "Γ corresponds to the real or in-phase component of the complex signal, and "Q" corresponds to the imaginary or quadrature component of the complex signal. A physical Ir link can transmit a plurality of IQ data streams, each IQ data stream corresponding to data of one antenna of one carrier (referred to as an antenna carrier (AxC)). An AxC is received or transmitted with an antenna through a carrier. The amount of user data is related.

The control data exchanged between the REC node and the RE node includes: operation and maintenance data (C&M data), synchronization data, and identification data (such as a frame number). The operation and maintenance data (C&M data) is used for operation management and maintenance of the communication interface between the REC node, the RE node, the REC node, and the RE node, including parameter configuration class messages, state management class messages, and alarm management class messages. Various types of data such as version management classes. Synchronous data refers to the interaction between the REC node and the RE node. Synchronization and timing information can be used to detect supergroups, frame boundaries, and associated numbers. The IQ data and synchronization data of different antenna carriers can be multiplexed onto one Ir link by Time Division Multiplexing (TDM). The identification data is used to uniquely identify a frame.

In order to realize the data interaction between the REC node and the RE node, a Common Public Radio Interface (CPRI) protocol is proposed for the Wideband Code Division Multiple Access (WCDMA) system, in which the RE node utilizes multiple antenna carriers. Receiving or transmitting data through the radio frequency interface, the REC node is separated from the RE node and connected through the transmission link. The generated control data and user data interact between the REC node and the RE node through the transmission link. The user data includes multiple data streams, and each data stream corresponds to data of a single carrier on a single antenna. Control data and user data are combined into a time division multiplexed (TDM) frame by time division multiplexing.

The CPRI protocol specifies an interface line rate between the REC node and the RE node of 614.4 Mbps, 1.2288 Gbps, or 2.4576 Gbps. For the line rate of 1.2288 Gbps, and using the frame structure shown in Figure 1, it can be seen from Figure 1 that a basic frame of a TDM consists of 16 words, each word occupies 16 bits, in a basic frame, The first word (16bit) is used to transfer control data, and the remaining words are used to transfer user data. In addition, as shown in FIG. 2, one basic frame contains 16x16 = 256 bits, and 256 basic frames are combined into one TDM superframe, and 150 superframes are combined into one WCDMA radio frame.

In the process of implementing the present invention, the inventors found that the following technical requirements exist:

The data interaction between the REC node and the RE node can also be applied to the TD-SCDMA system. For TD-SCDMA systems, in order to achieve better system performance, smart antenna technology needs to be supported. In a typical smart antenna application scenario, three sectors/carriers need to be considered, and an 8-cell smart antenna is used per sector/carrier, that is, 24 IQ data streams, that is, 24AxC, need to be supported.

In the TD-SCDMA system, in order to achieve a better data dynamic range, each data stream in the user data should use 16-bit bits. At this time, the data structure between the REC node and the RE node is realized by using the frame structure of the CPRI protocol. When the control data occupies one word length in one basic frame, only 15 words are actually used to transmit user data, so that the number of data streams for transmitting user data is less than 24 Therefore, the typical smart antenna application scenario in the TD-SCDMA system cannot be satisfied; when the REC node and the RE node exchange data in the TD-SCDMA system, the rate at which the radio base station processes the data stream is relatively low, and the system performance is relatively poor. .

Summary of the invention

Embodiments of the present invention provide a method, apparatus, and system for interworking data between a radio control node and a radio node to increase the rate of data flow between a radio control node and a radio node.

Embodiments of the present invention provide a method for interworking data between a radio equipment control node and a radio equipment node, where the data includes user data and control data, and the control data includes operation and maintenance data.

The radio equipment control node transmits downlink operation and maintenance data to the radio equipment node in an uplink time slot of the TD-SCDMA subframe; the radio equipment node transmits uplink operation and maintenance to the radio equipment control node in a downlink time slot of the TD-SCDMA subframe. data.

The embodiment of the present invention further provides a radio device control node that exchanges data with a radio device node, where the data includes user data and control data, and the control data includes operation and maintenance data, including:

a first sending module, configured to transmit downlink operation and maintenance data to a radio node in an uplink time slot of the TD-SCDMA subframe;

The first receiving module is configured to receive uplink operation and maintenance data transmitted by the radio node in a downlink time slot of the TD-SCDMA subframe.

The embodiment of the present invention further provides a radio device node, which interacts with a radio device control node, where the data includes user data and control data, and the control data includes operation and maintenance data, including:

a second sending module, configured to transmit uplink operation and maintenance data to the radio equipment control node in a downlink time slot of the TD-SCDMA subframe; The second receiving module is configured to receive downlink operation and maintenance data transmitted by the radio equipment control node in an uplink time slot of the TD-SCDMA subframe.

An embodiment of the present invention further provides a radio base station system, including a radio equipment control node and a radio equipment node; the radio equipment control node and the radio equipment node exchange data, the data includes user data and control data, and the control Data includes operational maintenance data,

a radio equipment control node, configured to transmit downlink operation and maintenance data to the radio equipment node in an uplink time slot of the TD-SCDMA subframe;

And a radio equipment node, configured to transmit uplink operation and maintenance data to the radio equipment control node in a downlink time slot of the TD-SCDMA subframe.

In the embodiment of the present invention, the radio equipment control node transmits downlink operation and maintenance data to the radio equipment node in the uplink time slot of the TD-SCDMA frame, so that the downlink operation and maintenance data transmission does not occupy the downlink time slot, and the control in the downlink time slot The data does not contain operation and maintenance data, and only a small part of the bits are occupied in the entire downlink time slot; the radio equipment node transmits uplink operation and maintenance data to the radio equipment control node in the downlink time slot of the TD-SCDMA frame, so that the uplink operation and maintenance data is performed. The transmission does not occupy the uplink time slot, and the control data in the uplink time slot does not include operation and maintenance data, and only a small part of the bits are occupied in the entire uplink time slot; thereby greatly improving the transmission rate of the user data, which can be made in the user data. Each data stream uses 16 bits to achieve a better data dynamic range, and can ensure that in the smart antenna application scenario of TD-SCDMA, 8 antennas carry 3 carriers and support 24 data streams.

DRAWINGS

1 is a schematic structural diagram of a basic frame in the background art;

2 is a schematic diagram showing the relationship between a basic frame and a WCDMA radio frame in the background art; FIG. 3 is a schematic structural diagram of a TD-SCDMA subframe according to an embodiment of the present invention;

4 is a schematic diagram showing the relationship between a group and a TD-SCDMA frame according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a group in an operation and maintenance subchannel according to an embodiment of the present invention; 6 is a schematic structural diagram of a group in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a synchronization subchannel of each super group according to an embodiment of the present invention; FIG.

8 is a schematic structural diagram of a radio device control node according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a radio device node according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a base station system of a radio device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the TD-SCDMA system, one TD-SCDMA frame is composed of two TD-SCDMA subframes. As shown in FIG. 3, one TD-SCDMA subframe includes a service time slot (TS0~TS6) and an uplink pilot time slot ( UpPTS), downlink pilot time slot (DwPTS) and guard interval (GP); wherein the downlink service time slot and the downlink pilot time slot are used for transmitting downlink data, which are called downlink time slots; uplink service time slots and uplink pilot channels The time slot is used to transmit uplink data, which is called an uplink time slot.

Based on the structural features of the TD-SCDMA subframe, in the embodiment of the present invention, the data exchanged between the REC node and the RE node is partially separated and transmitted. The specific treatment is as follows:

In the data that interacts between the REC node and the RE node, the operation and maintenance data in the control data is transmitted separately from the other control data. The REC node transmits downlink operation and maintenance data to the RE node in the uplink time slot of the TD-SCDMA subframe; the RE node transmits the uplink operation and maintenance data to the REC node in the downlink time slot of the TD-SCDMA subframe. Among them, the REC node and the RE node can exchange data through the interface, such as through the Ir interface or other interfaces that can be used to exchange data between the REC node and the RE node.

After the operation and maintenance data is separated from the control data, the REC node transmits the downlink user data and other control data other than the operation and maintenance data, such as the synchronization data and the identification data, to the RE node by using the downlink time slot of the TD-SCDMA subframe. (Frame number); The RE node transmits uplink user data and other control data other than operation and maintenance data, such as synchronization data and identification data, to the REC node by using the uplink time slot of the TD-SCDMA subframe. Due to the control data exchanged between the REC node and the RE node, the operation and maintenance data accounts for a large proportion of the entire control data. Therefore, when the operation and maintenance data is separated from the control data and the other control data is uplink and downlink. The embodiment method separately transmitted on the slot can make the proportion of the control data in the TD-SCDMA subframe greatly decrease when the REC node and the RE node exchange data, so that more time slots are used for transmitting user data, so When each data stream in the user data is sampled by 16 bits, the number of data streams for transmitting user data can be up to 24, which satisfies 3 sectors/carriers in the TD-SCDMA system, and each sector/carrier The need to use an 8-unit smart antenna application scenario.

A TD-SCDMA frame can be composed of multiple TDM supergroups, and a TDM supergroup can be composed of multiple TDM groups. As shown in FIG. 4, a specific example of the composition relationship between a group and a TD-SCDMA frame is that 64 or 32 groups (represented by a variable X) are combined into a super group of TDM (the frame number is represented by a variable Z). ), composed of 200 supergroups into one TD-SCDMA frame; FIG. 4 shows a case where a group of 64 groups is combined into one super group of TDM, and a case where 32 groups are combined into one super group of TDM similar. In the implementation, one super group occupies 50 microseconds, and one TD-SCDMA frame occupies 10 milliseconds.

A specific example is that in the TD-SCDMA subframe, the downlink C&M Data is transmitted by using Tsl and UpPTS, and the uplink C&M Data is transmitted by using TsO and DwPTS.

For the downlink, there are a total of (864+160) 768 768 bits / 768 bits = 1024 Groups can be used as the Control plane. In one embodiment, downlink operational maintenance class data is allocated to 1024 subchannels. Each subchannel consists of a group of 768 bits, and the composition of each group is as shown in Figure 5.

For the uplink, (864+96) 768 768 bits / 768 bits = 960 Groups can be used as the Control plane. In one embodiment, uplink operational maintenance class data is allocated to 960 subchannels. Each subchannel consists of a group of 768 bits, and the composition of each group is as shown in Fig. 5.

In Figure 5, the four types of operation and maintenance data (parameter configuration class messages, status management class messages, alarm management class messages, version management class messages) and reserved data are only one size. The indication, the specific size depends on the needs of the actual network.

In addition, since the initial synchronization requires synchronization word continuity, the initial synchronization data is placed in C&M Data.

As shown in Figure 6, a group of TDM frames consists of 24 words, each of which holds 32 bits, and a group contains 24 32 = 768 bits. Different from the frame structure of the CPRI protocol in the prior art, in the embodiment of the present invention, after the operation and maintenance data is separated from the control data, it is not necessary to use one word (16 bit) long to transmit the control other than the operation and maintenance data in one group. Data, and control data other than operation and maintenance data, such as synchronization data, identification data (frame number), can be compressed to 1 bit, occupying the lowest bit in a word, and the remaining bits can be used to transmit user data, so that the user The data is significantly higher in the overall group.

The shaded portion shown in Figure 6 is the bit occupied by the control data other than the operation and maintenance data. Since the bit is located at the lowest bit of the lowest byte in the entire group, its impact on the user data transmission of the entire group is very small, which can be approximated as the entire group is used to transmit user data, so that the radio base station processes the data. The rate of flow is significantly faster.

In Figure 6, each group consists of 24 words with an index of W=0...23. The number of bytes contained in each word is represented by T, each word corresponds to an 8-bit byte, and the bits in each byte are represented by B=0...7. The value of T depends on the total data rate, which is called the Ir line bit rate. In this example, the total length of the word is 32 bits, that is, the value of T is 4, and the available data rate is 1228.8 Mbps. Index B and index T can be used to address each bit within a word. Where B=0 and T=0 is the lowest. The first bit of the word with the index W=0 is used as the control word, that is, the first bit of the first word of each group is X.0.0 as Start of Super-Group, SGN and BFN (synchronous data and Identification data), the remaining bits in the basic group are used to transfer user data.

The right side of Fig. 6 indicates the transmission order of a plurality of bits in the direction of the arrow. If "ABCDEFGH" is used to indicate each bit from low to high in a byte, after 8B/10B encoding, ten blocks "ABCDEI FGHJ" are transmitted as serial data streams starting from "A". That is, in the 8B/10B encoding, one code bit is added to the three highest bits, and the other code bit is added to the five lowest bits. Of course, the case where the control data other than the operation and maintenance data shown in FIG. 6 occupies 1 bit is only a specific example in the embodiment of the present invention. In the embodiment of the present invention, control data other than the operation and maintenance data may also be The lowest bit of other words in the group is occupied, for example, the least significant bits of different words are sequentially selected in the group for transmission of control data other than the operation and maintenance data. Of course, the total number of least significant bits of the words occupied by the control data other than the operation and maintenance data in one group cannot exceed (15 bits), because when 16 bits are occupied, only 15 words of user data can be transmitted in one group. At this time, it is also unable to meet the requirements of 3 sectors/carriers in the TD-SCDMA system, and 8 units of smart antenna application scenarios per sector/carrier.

Based on the above situation, a threshold value may be set according to user requirements and system capabilities. The total number of lowest bits of words occupied by control data other than operation and maintenance data in a group shall not exceed the threshold to satisfy the TD-SCDMA system. 3 sectors/carriers, 8 sectors of smart antenna application scenarios per sector/carrier. Of course, the threshold should not exceed 15.

A supergroup corresponds to 64 subchannels, the index of the subchannel ranges from 0 to 63, and the control word index (Ns) of the subchannels has four possible values - 0, 1, 2, and 3. The control word index within the supergroup is given by the equation X=Ms+16 x Ns.

The synchronization subchannel of each super group is shown in Figure 7. The synchronous data corresponds to the 0th control word at Ms = 0 and Ns = 0 to the 7th control word with Ms = 7 and Ns = 0. As described above, the synchronization and data included in the control word are detected by the RE node to realize synchronization and timing between the REC node and the RE node. The lower 8 bits of SGN correspond to the 16th control word at Ms=0 and Ns=1 to the 23rd control word at Ms=7 and Ns=1, and the upper 8 bits of SGN correspond to Ms=0 and Ns = The 32nd control word at 2 to the 39th control word with Ms = 7 and Ns = 2. The lower 8 bits of BFN correspond to the 8th control word at Ms=8 and Ns = 0 to the 15th control word with Ms = 15 and Ns = 0, the upper 8 bits of BFN and Ms=8 and Ns = 1 The 24th control word to the 31st control word of Ms = 15 and Ns = 1. All other control words are reserved.

In the implementation, user data, synchronization data, and identification data of different antenna carriers are multiplexed into one Ir link by time division multiplexing (TDM). Due to synchronization data, identification data only occupies the group The lowest bit of the word, so synchronization and timing can be achieved without affecting the quality of the user data. Based on the same inventive concept, an embodiment of the present invention further provides a radio device control node, which interacts with a radio device node, and the interaction data includes user data and control data, and the control data includes operation and maintenance data, and the structure thereof is as shown in FIG. 8. The first sending module 81 is configured to: transmit, in an uplink time slot of the TD-SCDMA subframe, downlink operation and maintenance data to the radio equipment node; The receiving module 82 is configured to receive uplink operation and maintenance data transmitted by the radio node in a downlink time slot of the TD-SCDMA subframe.

In an embodiment, the control data further includes synchronization data and identification data. The first sending module 81 is further configured to transmit downlink user data, synchronization data, and identification data to the radio node in a downlink time slot of the TD-SCDMA subframe. The first receiving module 82 is further configured to receive uplink user data, synchronization data, and identification data transmitted by the radio node in an uplink time slot of the TD-SCDMA subframe.

In one embodiment, the control data further includes synchronization data and identification data; the first sending module 81 is further configured to transmit downlink synchronization data and identification data to the radio node in the lowest bit of the word in the group, the total number of the lowest bits. The first receiving module 82 is further configured to receive uplink synchronization data and identification data transmitted by the radio node in the lowest bit of the word in the group, where the total number of the lowest bits does not exceed the set width. value.

In an embodiment, the first sending module 81 is further configured to sequentially select the lowest bit of the different words in the group to transmit the downlink synchronization data and the identification data to the radio node. The first receiving module 82 may also be used to sequentially in the group. Selecting the lowest bit of the different word to receive the uplink synchronization data and the identification data transmitted by the radio node; or, the first sending module 81 may further be configured to transmit the downlink synchronization data to the radio node in the lowest bit of the lowest word in the group. Identification data; The first receiving module 82 is further configured to receive uplink synchronization data and identification data transmitted by the radio node in the lowest bit of the lowest word in the group.

Based on the same inventive concept, an embodiment of the present invention further provides a radio node, and a wireless device. The data is exchanged between the control nodes of the electrical device, and the data of the interaction includes the user data and the control data, and the control data includes the operation and maintenance data. The structure is as shown in FIG. 9 , and includes: a second sending module 91 and a second receiving module 92; a second sending module 91, configured to transmit uplink operation and maintenance data to the radio equipment control node in a downlink time slot of the TD-SCDMA subframe; and a second receiving module 92, configured to be in an uplink time slot of the TD-SCDMA subframe Receiving downlink operation and maintenance data transmitted by the radio equipment control node.

In an embodiment, the control data further includes synchronization data and identification data. The second sending module 91 is further configured to transmit uplink user data, synchronization data, and identifiers to the radio device control node in an uplink time slot of the TD-SCDMA subframe. The second receiving module 92 is further configured to receive downlink user data, synchronization data, and identification data transmitted by the radio control node in a downlink time slot of the TD-SCDMA subframe.

In one embodiment, the control data further includes synchronization data and identification data; the second sending module 91 is further configured to transmit uplink synchronization data and identification data to the radio device control node in the lowest bit of the word in the group, the lowest bit bit The total number does not exceed the set threshold; the second receiving module 92 is further configured to receive downlink synchronization data and identification data transmitted by the radio control node in the lowest bit of the word in the group, where the total number of the lowest bits does not exceed the setting. The value of the bar.

In an embodiment, the second sending module 91 is further configured to sequentially select the lowest bit of the different words in the group to transmit the uplink synchronization data and the identification data to the radio control node; the second receiving module 92 may also be used in the group. The lowest bit of the different words is sequentially selected to receive the downlink synchronization data and the identification data transmitted by the radio control node; or the second sending module 91 is further configured to transmit the uplink to the radio control node in the lowest bit of the lowest word in the group. Synchronizing the data and the identification data; the second receiving module 92 is further configured to receive the downlink synchronization data and the identification data transmitted by the radio control node in the lowest bit of the lowest word in the group.

Based on the same inventive concept, an embodiment of the present invention further provides a radio base station system, which is structured as shown in FIG. 10, including a radio device control node 101 and a radio device node 102; and an interaction between the radio device control node 101 and the radio device node 102. Data, interactive data including User data and control data, the control data includes operation and maintenance data, and the radio equipment control node 101 is configured to transmit downlink operation and maintenance data to the radio equipment node 102 in an uplink time slot of the TD-SCDMA subframe; the radio equipment node 102, The uplink operation and maintenance data is transmitted to the radio equipment control node 101 in the downlink time slot of the TD-SCDMA subframe.

A person skilled in the art can understand that all or part of the steps in the foregoing method can be completed by a program, and the program can be stored in a computer readable storage medium. The storage medium can include: ROM, RAM, Disk or disc, etc.

On the other hand, in the embodiment of the present invention, the radio equipment control node transmits user data, synchronization data, and identification data to the radio equipment node in the downlink time slot of the TD-SCDMA subframe; the radio equipment node is in the TD-SCDMA subframe. In the uplink time slot, user data, synchronization data and identification data are transmitted to the radio equipment control node, thereby realizing synchronization and timing on the basis of ensuring the quality of the user data and ensuring the requirements of the smart antenna application scenario of the TD-SCDMA. The spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of the invention as claimed.

Claims

Rights request

What is claimed is: 1. A method of interacting data between a radio device control node and a radio device node, the data comprising user data and control data, the control data comprising operational maintenance data, wherein:

2. The method according to claim 1, wherein the control data further comprises synchronization data and identification data; the radio equipment control node transmits the downlink user to the radio equipment node in a downlink time slot of the TD-SCDMA subframe. Data, synchronization data, and identification data; the radio equipment node transmits uplink user data, synchronization data, and identification data to the radio equipment control node in an uplink time slot of the TD-SCDMA subframe.

3. The method according to claim 1, wherein one TD-SCDMA frame is composed of two TD-SCDMA subframes, and one TD-SCDMA frame is composed of a plurality of supergroups, and one group is composed of a plurality of groups. .

4. The method according to claim 3, characterized in that: 200 supergroups form a TD-SCDMA frame, and 64 or 32 groups form a supergroup.

5. The method according to claim 3, wherein the control data further comprises synchronization data and identification data; the radio device control node and the radio device node exchange synchronization data and identification data with the lowest bit of the word in the group. The total number of the least significant bits does not exceed the set threshold.

The method according to claim 5, wherein the radio equipment control node and the radio equipment node sequentially select the lowest bit of different words in the group to exchange synchronization data and identification data;

Alternatively, the radio control node and the radio node interact with the lowest bit of the lowest word in the group to synchronize data and identification data.

7. The method of claim 1, wherein: the TD-SCDMA subframe is on The row slot includes an uplink traffic slot and an uplink pilot slot; and the downlink slot of the TD-SCDMA subframe includes a downlink traffic slot and a downlink pilot slot.

A radio device control node that interacts with a radio device node, the data includes user data and control data, and the control data includes operation and maintenance data, and the method includes:

The radio equipment control node according to claim 8, wherein the control data further includes synchronization data and identification data; the first transmitting module is further configured to be in a downlink time slot of the TD-SCDMA subframe Transmitting downlink user data, synchronization data, and identification data to the radio device node;

The first receiving module is further configured to receive uplink user data, synchronization data, and identification data transmitted by the radio equipment node in an uplink time slot of the TD-SCDMA subframe.

10. The radio device control node according to claim 8, wherein the control data further comprises synchronization data and identification data; the first transmitting module is further configured to: use a least significant bit of the word in the group to the radio node Transmitting downlink synchronization data and identification data, the total number of the lowest bit bits not exceeding a set threshold;

The first receiving module is further configured to receive uplink synchronization data and identification data transmitted by the radio node in the lowest bit of the word in the group, the total number of the lowest bits not exceeding a set threshold.

The radio equipment control node according to claim 10, wherein the first sending module is further configured to sequentially select the lowest bit of a different word in the group to transmit downlink synchronization data and identification data to the radio node; The first receiving module is further configured to sequentially select the lowest bit of the different word in the group to receive the uplink synchronization data and the number of identifiers transmitted by the radio node. According to;

Or the first sending module is further configured to transmit downlink synchronization data and identification data to a radio node in a lowest bit of the lowest word in the group; the first receiving module is further configured to use a lowest bit of the lowest word in the group The bit bits receive uplink synchronization data and identification data transmitted by the radio node.

12. A radio device node, interacting with a radio device control node, the data comprising user data and control data, the control data comprising operation and maintenance data, wherein:

a second sending module, configured to transmit uplink operation and maintenance data to the radio device control node in a downlink time slot of the TD-SCDMA subframe;

And a second receiving module, configured to receive downlink operation and maintenance data transmitted by the radio device control node in an uplink time slot of the TD-SCDMA subframe.

The radio equipment node according to claim 12, wherein the control data further includes synchronization data and identification data; the second sending module is further configured to be in an uplink time slot of the TD-SCDMA subframe, Transmitting uplink user data, synchronization data, and identification data to a radio device control node;

The second receiving module is further configured to receive downlink user data, synchronization data, and identification data transmitted by the radio equipment control node in a downlink time slot of the TD-SCDMA subframe.

14. The radio device node according to claim 12, wherein the control data further comprises synchronization data and identification data; the second transmitting module is further configured to control a node of the lowest bit of the word in the group to the radio device Transmitting uplink synchronization data and identification data, the total number of the lowest bit bits not exceeding a set threshold;

The second receiving module is further configured to receive downlink synchronization data and identification data transmitted by the radio device control node in a lowest bit of the word in the group, the total number of the lowest bit bits not exceeding a set threshold.

15. The radio device node of claim 14, wherein the second transmission The module is further configured to sequentially select the lowest bit of the different word in the group to transmit the uplink synchronization data and the identification data to the radio control node; the second receiving module is further configured to sequentially select the lowest bit of the different words to receive the radio in the group. The downlink synchronization data and the identification data transmitted by the device control node;

Or the second sending module is further configured to: send the uplink synchronization data and the identifier data to the radio device control node in the lowest bit of the lowest word in the group; the second receiving module is further configured to use the lowest word in the group. The least significant bit receives downlink synchronization data and identification data transmitted by the radio control node.

16. A radio base station system, comprising: a radio equipment control node and a radio equipment node; the radio equipment control node interacting with a radio equipment node, the data comprising user data and control data, the control data including operation and maintenance Data, which is characterized by