KR20070065988A - A cell bus system having cell bus arbitration function per inserted board and the method thereof - Google Patents

Abstract

A cell bus arbitration system having a cell bus arbitration function for each mounted board and its method are provided to effectively perform data transmission by managing a cell bus, and to improve a data transmission rate. A cell bus slave part(29) outputs mounting information of mounted cell bus slaves to a cell bus master part(21). The cell bus master unit generates tokens only for the mounted cell bus slaves by using the cell bus mounting information received from the cell bus slave part, and performs cell bus arbitration.

Description

A cell bus arbitration system having a cell bus arbitration function for each board and a method thereof

1 is a schematic block diagram of a conventional W-CDMA FDD base station system,

FIG. 2 is a flowchart illustrating a process of a cell bus arbitration method in the base station system of FIG. 1.

3 is a schematic block diagram of a W-CDMA FDD base station system according to an embodiment of the present invention;

4 is a flowchart illustrating an embodiment of a process for processing a cell bus arbitration method for each board of a base station system according to the present invention;

5 is a conceptual diagram of token allocation for Cellbus arbitration,

6 is a view showing a token allocation state in the prior art,

7 is a diagram illustrating a token allocation state by a cell bus arbitration method according to the present invention.

Description of the main symbols in the drawings

10, 20: base station system

11, 21: cell bus master unit (control board)

12, 22: mounting information processing unit

13, 23: request signal processing unit

14, 24: Cellbus Arbitration Division

15, 25: Ack signal processing unit (Acknowledge signal processing unit)

16, 26: frame signal processing unit 17, 27: data processing unit

18, 28: Cellbus slave control unit

19, 29: cell bus slave unit (channel card)

The present invention relates to cell bus arbitration of a communication system, and more particularly, a cell bus having a cell bus arbitration function for each board that enables the cell bus master unit to efficiently arbitrate the cell bus using cell bus slave implementation information. An arbitration system and method thereof are provided.

1 illustrates a schematic configuration of a W-CDMA FDD base station system performing cell bus arbitration using a 9-bit data bus, a 1-bit frame signal, and a 2-bit control signal, which are common signals of the prior art. Drawing.

In general, a W-CDMA FDD base station system is a channel card that handles the traffic data of a subscriber and a network card that is in charge of a physical network connection for transmission and management and control data transmission of the subscriber traffic data with the host system. It is composed of a control board that manages a management function associated with a plurality of base station cards, and data transmission between them transmits data through a cell bus.

As described above, the conventional W-CDMA FDD base station system includes a cell bus master unit 11 for controlling a channel card on a cell bus, and a plurality of cell bus slaves 19. And a cell bus slave unit 19 having -1, 19-2, ..., 19-12, .... The cell bus master unit 11 performs a cell bus master unit function of arbitrating a cell bus through cell bus occupancy assignment in the system, and the cell bus slave unit 19 is a cell bus slave unit 19. Performs cell bus slave functions such as requesting cell bus occupancy rights of a slave and data transmission and reception through an assigned cell bus.

As shown in FIG. 1, the cell bus master unit 11 is a cell bus slave 19-1, 19-2,..., 19 of a cell bus slave unit 19. -12, ....) a mounting information processing unit 12 for processing the insertion state; A request signal processing unit 13 for processing a request signal transmitted from the cell bus slave unit 19; A Cell Bus Arbitration Unit 14 serving as an Arbitration of the Cell Bus; An Ack (Acknowledge) signal generation unit 15 for generating an Ack (Acknowledge) signal that permits the transfer of data from the Cell Bus slave unit 19; A frame signal processing unit 16 for receiving a signal indicating the start of data transmission from the cell bus slave unit 19; A data processor 17 for processing data of a cell bus; And a cell bus slave controller 18 that is responsible for error detection and reset of the cell bus slave unit 19.

The cell bus slave unit 19 includes a plurality of cell bus slaves 19-1, 19-2,..., 19-12,... Configured as channel cards as described above. ) Is implemented.

The cell bus is a request signal and an ack used by each cell bus slave 19-1, 19-2, ..., 19-12, .... A 9-bit data bus that is a common signal commonly used by all cell bus slaves 19-1, 19-2, ..., 19-12, ... in addition to the acknowledgment signal, Consists of a 1-bit frame signal

FIG. 2 is a flowchart illustrating a process for cell bus arbitration in a W-CDMA FDD base station system having the configuration of FIG. 1.

Referring to FIG. 2, a process for cell bus arbitration in a W-CDMA FDD base station system having the configuration of FIG. 1 will be described.

When the board is mounted, the cell bus slave unit 19 outputs an insert (insert) signal to the mounting information processing unit 12 of the cell bus master unit 11 (S1).

Each Cell Bus slave (19-1, 19-2, ..., 19-12, ...) is a frame signal is deassert, the transmission When there is data to be transmitted, a request signal is sent to inform the cell bus master unit 11 that there is data to be transmitted (S2).

At this time, the cell bus master unit 11 receives the signal through the request signal processing unit 13 and transmits the signal to the cell bus arbiter 14. The cell bus arbitration unit 14 checks the received request signal and the bus occupancy state and then assigns the bus occupancy right to each cell bus slave by the arbitration process. 1, 19-2, ..., 19-12, ...) as an Ack signal indicating the data transmission permission generated by the Ack signal generation unit 14. In this case, as shown in FIG. 5, the cell bus arbitration unit 14 of the cell bus master unit 11 is a cell bus slave 19-1, 19-2, ..., 19-12, .... ), The tokens are generated on all cell buses of the slave unit regardless of whether they are sequentially installed (S3).

At this time, the cell bus slaves 19-1, 19-2,..., 19-12,... That have received the Ack signal from the cell bus master unit 11 receive data. At the same time as applying the frame signal indicating the start of the transmission (S4), data transmission of 9 bits is started (S5).

The frame signal received from the corresponding Cell Bus slaves 19-1, 19-2,..., 19-12, .... is a frame signal processor 16. Is processed and transmitted to the cell bus arbitration unit 14 and the frame signal transitions to the deassert state, the corresponding cell bus slaves 19-1 and 19-. 2, ..., 19-12, ....) to initialize the bus occupancy rights (S6).

As described above, the conventional W-CDMA base station system includes one cell bus master unit 11 and a plurality of cell bus slaves 19-1, 19-2, ..., 19-12,... Are configured with a cell bus slave unit 19. For data transmission, a plurality of cell bus slaves 19-1, 19-2, ..., 19-12, ... are cell request signals for their data transmission. The cell bus master unit 11 transmits the cell bus master unit 11 to the cell bus slave unit 19-1, 19-2, .. .., 19-12, ....) will send an Ack (Acknowledge) signal to allow data transmission.

Accordingly, the cell bus arbitration method of the related art as described above performs cell bus arbitration after generating tokens for all slots of the cell bus slave unit without using the mounting information of the cell bus slave unit 19. Cell bus arbitration functions, including cell bus slaves (19-1, 19-2, ..., 19-12, ...) that are not physically mounted There is a problem that inefficiency of bus arbitration occurs.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, and performs cell bus arbitration only for cell bus slaves mounted between the cell bus master unit and the cell bus slave unit having a plurality of cell bus slaves. It is an object of the present invention to provide a cell bus arbitration system having a cell board arbitration function for each board which can efficiently perform cell bus arbitration, and a method thereof.

Particularly, the present invention is designed to be suitable for a structure using a 9-bit data bus, a 1-bit frame signal, and a 2-bit control signal that are common signals in a base station of a W-CDMA FDD system. Bus) The master unit has more efficient bus arbitration through the detection of the mounting of the cell bus slaves, which enables efficient bus structure management and effective data transfer, thus providing cell board arbitration function for each board suitable for improving system performance. It is an object of the present invention to provide a cell bus arbitration system and a method thereof.

In order to achieve the above object, a cell bus arbitration system having a cell board arbitration function for each board of the present invention is a system for performing data communication using a common cell bus. A cell bus slave unit for outputting negatively; And a cell bus master unit which generates a token only for the mounted cell bus slaves by using the cell bus mounting information received from the cell bus slave and performs cell bus arbitration.

The cell bus master unit may include: a mounting information processor configured to process a cell bus slave insertion (mounting) state of the cell bus slave unit and output mounting information of the cell bus slave to a cell bus arbitration unit; A request signal processor for outputting a request signal transmitted from the cell bus slave unit to the cell bus arbitration unit; A cell bus arbitration unit that generates a token for only cell bus slaves using cell bus slave implementation information of the mounting information processing unit after receiving the request signal and performs cell bus arbitration; ; And an Ack (Acknowledge) signal generation unit for generating and outputting an Ack (Acknowledge) signal for allowing data transmission to the Cell Bus slave granted the Cell Bus Occupancy by the Cell Bus Arbiter. It is characterized by.

The cell bus master unit may further include a frame signal processor configured to receive a frame signal indicating the start of data transmission from the cell bus slave to control transmission and reception of data; A data processor which processes transmission / reception data of the cell bus; And a cell bus slave controller in charge of error detection and reset of the cell bus slave unit.

In order to achieve the above object, the board-specific cell bus arbitration method of the base station system of the present invention generates a token only for cell bus slaves corresponding to the mounting information after receiving board mounting information from the cell bus slave unit. Token generation process; A request reception detection step of detecting reception of a request signal from the cell bus slave; And a cell bus arbitration process in which a token generated in the token generation process is allocated for data transmission and reception of the request request cell bus slave when the request reception occurs.

The cell bus arbitration process includes: a cell bus occupancy determination step of determining whether a cell bus is occupied when the request signal is received; If the cell bus is occupied, the cell waits to release the cell bus and allocates a token, and if the cell bus is not occupied, allocates a token generated in the token generation process to grant the cell bus slave right to the request request cell bus slave. Bus occupancy granting process; And a cell bus occupancy right recovery process of recovering the cell bus occupancy right and storing the allocated token when the data communication for granting the cell bus occupancy right is terminated.

The allocation of the token in the cell bus occupancy right granting process grants the cell bus occupancy right requesting cell bus slave a token in a sequence following the token stored in the cell bus occupancy right recovery process.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a schematic configuration of a W-CDMA FDD base station system having a structure using a 9-bit data bus, a 1-bit frame signal, and a 2-bit control signal, which are common signals, according to an embodiment of the present invention; It is a figure which shows.

As described in the related art, the W-CDMA FDD base station system also establishes a physical network connection for transmitting the subscriber traffic data, management, and control data with the channel card and the host system that handles the traffic data of the subscriber. It consists of a network board in charge, and a control board in charge of management functions related to a plurality of base station cards. Data transmission between them transmits data through a cell bus.

In addition, the W-CDMA FDD base station system also controls a channel card on a cell bus, and the control board becomes a cell bus master unit 21, and the channel card is a cell bus slave 29 -1, 29-2, ..., 29-12, ... ...), and multiple cell bus slaves (29-1, 29-2, ..., 29-12) ... become the cell bus slave unit 29.

The cell bus master unit 21 performs a cell bus master unit function as an arbitration function such as the number of cell bus allocations in the system, and is received from the cell bus slave unit 29. Cell bus arbitration is performed by generating a token only for the mounted cell bus slaves using cell bus implementation information.

The cell bus slave unit 29 outputs mounting information of the mounted cell bus slave to the cell bus master unit, and outputs a request signal for requesting the cell bus to the cell bus master unit 21 to receive the occupancy rights of the cell bus. Performs the cell bus slave function of transmitting and receiving data through the cell bus.

As shown in Fig. 3, the cell bus master section 21 includes a mounting information processing section 22; A request signal processor 23; A cell bus arbiter 24; An Ack (Acknowledge) signal generator 25; A frame signal processor 26; A data processor 27; It is configured to include a; cell bus (Cell Bus) slave controller 28.

The mounting information processor 22 is a cell bus slave 29-1, 29-2,..., 29-12,... Of the cell bus slave unit 29. The insertion (mount) state is processed, and the mounting information of the cell bus slaves 29-1, 29-2, ..., 29-12, ... is output to the cell bus arbitration unit 24.

The request signal processor 23 outputs a request signal transmitted from the cell bus slave unit 29 to the cell bus arbitration unit 24.

The cell bus arbitration unit 24 generates a token for controlling cell bus occupancy only for the cell bus slaves mounted using the cell bus slave mounting information of the mounting information processing unit 22. Thereafter, when a request signal is input from the request signal processor 23, an arbitration function of a cell bus is executed using a token generated only for mounted cell bus slaves to grant cell bus occupancy rights. If the transmission and reception of data is terminated after the cell bus occupancy right is granted, the bus occupancy right is recovered.

The Ack (Acknowledge) signal generation unit 25 is the cell bus slave (29-1, 29-2, ..., ...) granted the cell bus occupancy rights by the cell bus arbitration unit (24). 29-12, ....) generates and outputs an Ack (Acknowledge) signal that allows data transmission.

The frame signal processor 26 notifies the start of data transmission from the cell bus slaves 29-1, 29-2, ..., 29-12, .... Receives a frame signal to control the transmission and reception of data.

The data processor 27 performs data transmission / reception of the cell bus.

The cell bus slave controller 28 is responsible for error detection and reset of the cell bus slave unit 29.

The cell bus slave unit 29 includes a plurality of cell bus slaves 29-1, 29-2,..., 29-12,. ) Is implemented.

The cell bus is a request signal and an Ack (request) used by each cell bus (Cell Bus slaves 29-1, 29-2, ..., 29-12, ...). In addition to the Acknowledge signal, a 9-bit data bus that is a common signal commonly used by all cell bus slaves (29-1, 29-2, ..., 29-12, ...), Consisting of 1-bit frame signal is the same as the prior art

The present invention described above can be used in a base station of a W-CDMA FDD system composed of one cell bus master unit 21 and a plurality of cell bus slave units 29.

4 is a flowchart illustrating a process for cell bus arbitration according to the present invention in a W-CDMA FDD base station system having the configuration of FIG. 3, and FIG. 5 is a conceptual diagram of cell bus arbitration.

Referring to FIGS. 3 and 5, a process for cell bus arbitration in the W-CDMA FDD base station system of FIG. 4 according to an embodiment of the present invention having the configuration of FIG. 3 will be described.

First, when the cell bus master unit 21 is powered, the mounting information of the cell bus slaves 29-1, 29-2, ..., 29-12, ... Cell bus slaves 29-1, 29-2,..., 29-12, .. each having received the mounting information from the cell bus arbitration unit 24 after receiving. Only tokens are generated (.11) (S11).

After that, the cell bus master unit 21 transmits a request transmitted from the mounted cell bus slaves 29-1, 29-2, ..., 29-12, .... Whether the (Request) signal is transmitted is periodically detected through the request signal processing unit 23 (S12).

When the request signal is received by the S12 process, a request signal received from each of the cell bus slaves 29-1, 29-2, ..., 29-12, ... The detected cell bus master unit 21 checks the current occupancy state of the cell bus (S13).

If there is a cell bus slave (29-1, 29-2, ..., 29-12, ...) occupying the cell bus as a result of checking in step S13, the corresponding request is requested. Ignore and maintain the current process (S14).

However, if there is no cell bus slave (29-1, 29-2, ..., 29-12, ...) occupying the cell bus as a result of the check of S13 process, the cell bus (Cell) Bus) After the token generation unit in the arbitration unit 24 is activated, the token for the corresponding request signal is allocated (S15).

Thereafter, when the token generation unit is activated by the process S15, an Ack (Acknowledge) signal for allowing the use of the cell bus is transmitted to the cell bus slave requesting the cell bus occupancy right (S16).

The cell bus slave receiving the Ack signal applies a 1-bit frame signal indicating the start of data and simultaneously transmits 9-bit data (S17).

The cell bus slave after the data transmission by the process S17 deasserts the frame signal to notify the cell bus master unit 21 of the completion of the data transmission and receives the received data. The bus master unit 21 recovers the bus occupancy right granted to the corresponding cell bus slave and initializes it (S18).

In operation S18, the cell bus arbitration unit 24 stores token information of a cell bus slave that has requested the last bus occupancy right for sequential token allocation for subsequent cell bus requests. (S19).

FIG. 5 is a diagram illustrating a token generation and control process for cell bus arbitration of the cell bus master unit as in the above-described prior art, FIG. 6 is a diagram illustrating a token generation state for cell bus arbitration in the prior art, and FIG. 7 Is a diagram illustrating a token generation state for cell bus arbitration according to the present invention.

As shown in FIG. 5, the cell arbitration unit generates a token for cell bus arbitration for each cell bus slave to sequentially perform the cell bus arbitration function. In the case of the conventional cell bus arbitration unit 14 (refer to FIG. 1), as shown in FIG. 6, a token is generated for each cell bus of a slot in which all cell bus slaves are mounted regardless of whether the cell bus slave is mounted. It will perform the bus arbitration function. Therefore, the conventional cell bus arbitration method has a problem of causing inefficiency and deterioration of cell bus usage.

However, the cell bus arbitration unit 24 of the cell bus master unit of the present invention receives board mounting information from the mounting information processing unit 22 that processes the insertion state of the cell bus slave unit 29. Thereafter, the cell bus arbitration unit 24 generates a token only for the mounted cell bus slaves to perform the cell bus arbitration function. For example, when a cell bus slave is mounted with only # 1, # 3, and # 5, the cell bus arbitration unit 24 of the present invention, as shown in FIG. Token generation process related to Arbitration exists only in three cases for cell bus slaves of # 1, # 3, and # 5, and for other non-implemented cell bus slaves. Exclude Token from Process. Therefore, the present invention can solve the problem that causes the inefficiency and performance degradation of the cell bus use of the cell bus arbitration method of the prior art.

The present invention described above uses the cell bus slave implementation information when the cell bus master unit 21 and the cell bus slave unit 29 share the cell bus and perform day communication like the W-CDMA FDD base station system. Cell bus slaves that are not implemented by the system are excluded from the cell bus arbitration function to efficiently perform cell bus management for cell bus arbitration. Therefore, the present invention described above enables efficient data transmission by efficiently managing the cell bus in the data transmission system using the cell bus, thereby providing an effect of improving the data transmission rate.

Claims (6)

In a system for performing data communication using a common cell bus, A cell bus slave section for outputting mounting information of the mounted cell bus slave to the cell bus master section; And a cell bus master unit generating a token only for the mounted cell bus slaves using cell bus mounting information received from the cell bus slave to perform cell bus arbitration. Cell bus mediation system with cell bus mediation function. The method of claim 1, wherein the cell bus master unit, A mounting information processing unit for processing a cell bus slave insertion (mounting) state of the cell bus slave unit and outputting mounting information of the cell bus slave to a cell bus arbitration unit; A request signal processor for outputting a request signal transmitted from the cell bus slave unit to the cell bus arbitration unit; A cell bus arbitration unit that generates a token for only cell bus slaves using cell bus slave implementation information of the mounting information processing unit after receiving the request signal and performs cell bus arbitration; ; And an Ack (Acknowledge) signal generation unit for generating and outputting an Ack (Acknowledge) signal for allowing data transmission to the Cell Bus slave granted the Cell Bus Occupancy by the Cell Bus Arbiter. A cell bus mediation system having a cell board mediation function for each board. The method of claim 2, wherein the cell bus master unit, A frame signal processor configured to receive a frame signal indicating the start of data transmission from the cell bus slave and control transmission and reception of data; A data processor which processes transmission / reception data of the cell bus; And a cell bus slave control unit configured to perform error detection and reset of the cell bus slave unit. A cell bus arbitration method of a cell bus arbitration system for performing data communication using a common cell bus, Generating a token only for cell bus slaves corresponding to the mounting information after receiving the board mounting information from the cell bus slave unit; A request reception detection step of detecting reception of a request signal from the cell bus slave; And a cell bus arbitration process for allocating a token generated in the token generation process to transmit and receive data of the request cell bus slave when the request is received. Bus arbitration method. The method of claim 4, wherein the cell bus arbitration process is performed. A cell bus occupation determination step of determining whether the cell bus is occupied when the request signal is received; If the cell bus is occupied, the cell waits to release the cell bus and allocates a token, and if the cell bus is not occupied, allocates a token generated in the token generation process to grant the cell bus slave right to the request request cell bus slave. Bus occupancy granting process; And a cell bus occupancy right recovery process of recovering the cell bus occupancy right and storing the allocated token information when the data communication for granting the cell bus occupancy right is terminated. Cell bus arbitration method performed. The cell of each board according to claim 5, wherein the allocation of the token in the cell bus occupancy right granting process grants the cell bus occupancy rights slave a token in a sequence following the token stored in the cell bus occupancy right recovery process. Cell bus arbitration method for performing bus arbitration.

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