JP4505373B2 - Destination stage generation method and destination stage generation apparatus - Google Patents

Description

  The present invention relates to a destination stage generation method and a destination stage generation apparatus, for example, destination information required when user data is transferred (routed) to a desired destination in a radio base station controller (RNC: Radio Network Controller). The present invention relates to a technique suitable for use in search (generation).

The RNC receives an uplink common channel [TrCH (RACH: Random Access Channel)] at a MAC (Media Access Control) layer, extracts each user data multiplexed therein, and transfers it to a desired destination ( Common channel termination function).
The protocol stack in the common channel termination function has, for example, an RRC (Radio Resource Control) layer and a PDCP (Packet Data Convergence Protocol) layer in the upper layer of the MAC layer. Each user data multiplexed on the channel (RACH) is extracted and transferred to the RRC layer (Dedicated Control Channel (DCCH)) or PDCP layer (Dedicated Traffic Channel (DTCH)) (Routing).

When realizing this function, a component called CAM (Content-Addressable Memory) may be used for destination search. That is, by registering output information for input information in advance in the CAM, the output information searched by the CAM can be acquired when the input information is given to the CAM at the time of destination search. Therefore, it is common to use a CAM to realize the destination search function. For example, it is used as a switching process by VPI / VCI (Virtual Path Identifier / Virtual Channel Identifier) in an ATM exchange, a MAC address lookup table in Ethernet (registered trademark), or the like. In addition, as disclosed in Patent Document 1 below, it has also been proposed to use a CAM in the destination search system in order to improve the transfer processing performance of the router device.
JP 2002-374289 A

  However, since the CAM is not a general-purpose component, the specifications differ depending on the supplier (manufacturer). For example, there are various methods for registering with the CAM and interfaces for accessing the CAM. Therefore, when a product equipped with a CAM is manufactured for several years, this component supply may become a bottleneck. That is, when the supply of the same product and the substitute product is stopped by the CAM manufacturer, there is no substitute product, so another manufacturer's product must be used, and it is necessary to recreate the product according to this specification.

  Further, when the manufacturers are different, the performance is also different, and in some cases, the performance may be deteriorated when an alternative is used. Normally, when a part is finished, it will be stocked to some extent, but if product shipments exceed expectations, there will be no preparation period for product redesign / evaluation by adopting another manufacturer's products, and shipment will be unavoidable There is no other way to pause, and it may happen that business opportunities can be missed unnecessarily.

  In addition, since the number of entries that can be registered in one CAM is limited, it is necessary to mount several CAMs when the number of entries is large. When each CAM is searched serially on the search, fluctuation occurs in the time for acquiring the search result. For example, when three CAMs are installed, the time required for search completion differs between when the search is completed with the first accessed CAM and when the search is completed with the third CAM. Absent.

  The present invention has been devised in view of the above problems, and an object thereof is to realize a search function equivalent to that in the case of using a CAM using a general-purpose memory without using a CAM. It is another object of the present invention to make the time required for destination search constant regardless of the number of entries.

In order to achieve the above object, the present invention is summarized as the following method and apparatus.
(1) At least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. In a device having a function of routing received data based on header information of the received data including the received data, a method for generating destination information of the received data, wherein the first information is used to identify the radio cell in the device Acquiring the fourth information by addressing the first information that holds the first information as an address, and identifying the terminal in the device by identifying the second information. Obtaining the fifth information by addressing the second table holding the second information as an address, the fifth information converted into the information necessary to perform the processing, the fourth information, and the second information Obtaining the sixth information by addressing a third table that holds the sixth information, which is the compressed information of the information set, as the address, the fourth information and the fifth information set; and the third information And a step of outputting the destination information by addressing the fourth table holding the destination information using the set of the sixth information as an address.

(2) Here, it is preferable that the fourth information is information obtained by compressing the first information into an amount of information sufficient to identify the radio cell in the apparatus.
(3) Moreover, it is preferable that this 5th information is the information which compressed this 2nd information in the information amount sufficient to identify this terminal within an apparatus.
(4) At least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. A device for generating destination information of the received data used for a device having a function of routing the received data based on header information of the received data including the first information, and identifying the wireless cell in the device A fourth table in which the fourth information converted into the information necessary to do this is stored as the first information as an address, and a fifth table in which the second information is converted into information necessary to identify the terminal in the device. A second table that holds the second information as an address, and a sixth information that is a compression information set of the fourth information and the fifth information, and a set of the fourth information and the fifth information as an address. A third table to be held, and the third information And a fourth table that holds the destination information with the set of the sixth information as an address, and the fourth information and the second information by addressing the first information and the second information with respect to the first table and the second table. The fifth information is acquired, the sixth information is acquired by addressing the fourth information and the fifth information with respect to the third table, and the third information and the sixth information for the fourth table are acquired. A destination stage generation apparatus comprising: a control unit that acquires and outputs the destination information by addressing with a set of information.

  (5) Also in this apparatus, it is preferable that the fourth information is information obtained by compressing the first information into an information amount sufficient to identify the wireless cell in the apparatus.

According to the present invention, since the destination information generation process can be realized without using a special storage medium such as a CAM, it is not affected by the termination of parts of the special storage medium such as a CAM. .
In addition, since necessary destination information is finally generated and output by the stepwise address specification for each of the above tables, the time required for generating the destination information is made constant regardless of the number of entries in the storage medium (table). Is possible.

  Furthermore, it is possible to reduce the required storage medium size by using, as the address, information for identifying a radio cell or information obtained by compressing information for identifying a terminal in the radio cell.

[A] Description of Embodiment FIG. 1 is a block diagram showing a configuration of a main part of a radio communication system according to an embodiment of the present invention. This radio communication system shown in FIG. 1 includes one or more radio mobile devices (UEs). : User Equipment) 3 and this wireless mobile device (mobile terminal) 3 are connected to a predetermined wireless access interface (for example, a UTRAN (Universal Terrestrial Radio Access Network) such as W-CDMA-UE and a wireless interface (Uu )], And a base station controller (RNC) 1 that accommodates the one or more radio base stations 2 through a predetermined interface (Iub).

  The RNC 1 has a PDCP layer, an RLC layer, and a MAC layer as a protocol stack. In the PDCP layer, header compression / transfer / PDCP sequence number management of received packets is performed, and in the RLC layer / MAC layer, wireless communication is performed. In order to transfer data efficiently in a section, a received packet is divided into fixed-length frames of a certain size, and data transfer is performed in units of frames. Further, error correction in the wireless section is also performed in units of the frame.

Specifically, the RNC 1 includes, for example, as shown in FIG. 2, a transmission / reception termination unit 11, an individual channel (ch) termination unit 12, a common channel (ch) termination unit 13, a device control channel (ch) termination unit 14, a service termination. A unit (PDCP layer) 15 and a control unit (RRC layer or the like) 16 are provided.
Here, the transmission / reception termination unit 11 performs termination processing of data transmitted / received to / from the radio base station 2 (individual / common / device control channel identification / separation, etc.). In this case, termination processing (extraction of user data, etc.) of the dedicated channel (DCH) identified and separated by the transmission / reception termination unit 11 is performed. The common channel termination unit 13 is a common channel identified and separated by the transmission / reception termination unit 11. The channel (RACH) is received by the MAC layer, each user data multiplexed on this is extracted and transferred (distributed) to the service termination unit (PDCP layer) 15 or the control unit (RRC layer etc.) 16 .

  FIG. 4 shows a protocol stack in the common channel termination unit 13. As shown in FIG. 4, the protocol stack in the common channel termination unit 13 includes, for example, an ATM (Asynchronous Transfer Mode) layer, an AAL (ATM Adaptation Layer) 2-pf layer, an Iub-RACH layer, and a MAC layer. The upper layer includes an RLC (Radio Link Control) layer, an RRC (Radio Resource Control) layer, an RLC layer, and a PDCP (Packet Data Convergence Protocol) layer. Therefore, the common channel termination unit 13 extracts each user data multiplexed on the uplink common channel (RACH), and extracts the RRC layer [dedicated control channel (DCCH)] or the PDCP layer [dedicated traffic channel (DTCH). ].

  FIG. 5 shows an example of the data format of each protocol (ATM layer, AAL2-pf layer, RACH, MAC layer). As shown in FIG. 5, an ATM cell has VPI / VCI, PT (Payload Type), CLP (Cell Loss Priority), and HEC (Header Error Control) as header information fields, and a payload (Payload) as a data field. The AAL2-pf protocol data [CID (Channel Identifier), LI (Length Indicator), UUI (User-to-User Indication), HEC, Payload] are accommodated in this payload.

  The payload of AAL2-pf data includes header CRC, CFN (Connection Frame Number), TFI (Transport Format Indicator), propagation delay (Propagetion Delay), TB, CRCI (CRC Indicator), and payload CRC. A RACH composed of fields is accommodated, and in the TB field of this RACH, TCTF (Target Channel Type Field), UE-Id Type, UE-Id (C-RNTI (Radio Nerwork Temporary Id)), C / T, MAC SDU ( MAC data (user data) consisting of each field of “Service Data Unit” is multiplexed for a plurality of users.

  The service termination unit 15 performs protocol processing (for example, assignment of a sequence number or retransmission processing in layer 2) for user data of dedicated channels and common channels, and the control unit 16 performs processing of dedicated channels and common channels. Protocol processing (establishing a connection with the wireless mobile device 3, handover control based on measurement information (terminal measurement information) from the wireless mobile device 3, etc.).

  Now, in the common channel termination unit 13, the interface [Iu] direction between the received RACH and the RNS (Radio Network Subsystem), which is part of the UMTS (Universal Mobile Telecommunication System), and the core network (CN). When routing to, information shown in the following table (table) 1 is required. That is, the protocol stack in this embodiment is as shown in FIG. 4 and the data format on each protocol stack is as shown in FIG. 5, but among the parameters in Table 2 used in the protocol of this example, the destination search ( Three types are used for destination information generation: VCI [first information for identifying a radio cell (hereinafter also simply referred to as “cell”)], UE-Id (C-RNTI) (inside radio cell) (Second information for identifying the terminal 3) and C / T (third information for identifying the logical channel used by the terminal 3) (see the field without networking in FIG. 5).

  In this case, since the total bit length required for input is 33 bits, simply searching (generating) destination information (output VCI) using this as an address requires more memory space than necessary. Therefore, in the present embodiment, the memory space required is compressed by compressing each parameter as described later.

VCI: Information for intra-device routing in RNC1 configured with ATM
C-RNTI: Information for identifying a user in a cell (in-cell user identification information)
C / T: Information for identifying a logical channel [Logical CH (DTCH / DCCH)] (logical channel identification information)

Specifically, the common channel termination unit 13 functions as the destination stage generation device of the present invention. For example, as shown in FIG. 3, the transmission / reception unit 131, the memory (reference table) 132, the processing unit 133, and the control A portion 134 is provided.

  Here, the transmission / reception unit 131 is for data transmission / reception among the transmission / reception termination unit 11, the service termination unit 15 and the control unit 16, and the memory 132 stores input information (C / T of RACH, Stores information (various tables) for outputting (generating (converting)) destination information from Iub-VCI, C-RNTI, and is not a special storage medium such as CAM but a general-purpose memory (storage medium) ) Apply.

Further, the processing unit 133 accesses the memory 132 using the above three types of information (RACH C / T, Iub-VCI, and C-RNTI) received from the transmission / reception unit 131 as input information, and sends destination information ( (Output VCI) is acquired (generated), and is configured by, for example, a DSP (Digital Signal Processor).
The control unit 134 is a part that performs overall control of the common channel termination unit 13 and can give an instruction necessary to acquire the destination information by communicating with the processing unit 133. The control unit 134 is configured using, for example, a CPU (Central Processing Unit). The processing unit 133 and the control unit 134 can be configured as a single control unit.

Next, various tables stored in the memory 132 will be described.
Tables used in the present embodiment are as shown in Table 3 below.

  That is, at least four types of cell-ID table (first table), Proxy-ID table (second table), user ID (User-ID) table (third table), and Iu-VCI table (fourth table). The table is stored in the memory 132, and the Cell-ID table is a table for determining (acquiring) the Cell-ID from the input information (RACH Iub-VCI). It has an address space, holds 7-bit Cell-ID (fourth information) using the input information (RACH VCI) as an address, and outputs the corresponding Cell-ID by addressing by VCI.

  By the way, since C-RNTI is information for identifying a user in a cell, if there is information that can distinguish a cell, the user can be identified in the device (RNC1). Here, it is the VCI that identifies the cell. Since VCI is intra-device routing information, it indicates routing information of Iub-FACH (Forward Access Channel), Iub-PCH (Page Channel), DTCH, and DCCH in addition to Iub-RACH. Therefore, although depending on the assignment method, when assigned randomly, the VCI information has no regularity and Iub-RACH is assigned. In this case, the VCI information becomes large, but if the number of VCIs used by Iub-RACH can be identified, the cell can be identified (specified).

  Therefore, when allocating RACH VCI, an ID for identifying a cell is bundled. This is Cell-ID. Thereby, when RACH is received, Cell-ID is acquired from the VCI. Since Cell-ID has a smaller value range than VCI, it is possible to compress (convert) information (acquire 7-bit Cell-ID from 13-bit VCI). That is, it is possible to compress the information to a necessary and sufficient amount for specifying the radio cell.

  That is, Iub-VCI can be converted (compressed) into information of the maximum number of cells supported by RNC 1 because C-RNTI, which is user identification information in the cell, is a unique value in the same cell. For example, if the current maximum number of supported cells of RNC1 is 36, 6 bits are sufficient, but in this example, conversion (compression) is performed to 7 bits with a margin of 1 bit. When up to four RACHs are registered in one cell, as shown in Table 5 below, VCIs of up to four RACHs may have the same Cell-ID.

When a plurality of RACHs are set in one cell in this way, the plurality of RACH VCIs (Celll-ID # 0 in the example of Table 5 above) can be combined.
Next, the Proxy-ID table is a table used to generate a temporary ID (Proxy-ID) (fifth information) from input information (RACH C-RNTI). The C-RNTI is simply compressed. The purpose is that. Therefore, in the table, Proxy-ID obtained by converting C-RNTI into information necessary to identify the terminal 3 in the apparatus is held using C-RNTI as an address. In addition, since it is a compression ID of C-RNTI, it may be the same value between cells. As shown in Table 6 below, this Proxy-ID table has a 16-bit address space, and outputs (compresses) a corresponding 12-bit Proxy-ID using input information (RACH C-RNTI) as an address. It is like that.

  This is because the C-RNTI does not need to have a range that exceeds the number of simultaneous connections that can be processed by the RNC 1 (becomes over spec), so the original C-RNTI takes a value in the range of 64k with 16 bits. For example, if the number of simultaneous connections is about 4k as the specification of RNC1, it is not necessary to secure 16 bits, so compression to a more appropriate range (a sufficient amount of information necessary to identify terminal 3 in the apparatus) Therefore, a 12-bit temporary ID (Proxy-ID) is output when the user connection is set.

  Next, the user ID table is a table used for linking the above Proxy-ID and Cell-ID. This is because the Proxy-ID described above overlaps between cells, and thus it is necessary to identify the user (terminal 3) within the RNC 1. That is, it is possible to specify a user in the RNC 1 by using two types of IDs (Cell-ID and Proxy-ID) acquired from the Cell-ID table and the Proxy-ID table.

  As shown in Table 7 below, this user ID table has a 19-bit address space, and a 12-bit user ID (User-ID) (sixth information) with a pair of Proxy-ID and Cell-ID as an address. ) And a corresponding user ID is output by address designation by a pair of Proxy-ID and Cell-ID.

That is, the User-ID need not take a value in the range that is equal to or greater than the number of simultaneous connections in the RNC 1 like the Proxy-ID, and may have a value in the same range as the Proxy-ID (12 bits) at the maximum. Therefore, a set of 19-bit Proxy-ID and Cell-ID is compressed (converted) into a 12-bit user ID and output.
Next, the Iu-VCI table is a table used for obtaining the output VCI that is final destination information (that is, determining the final destination route). For example, as shown in Table 8 below, It has a 16-bit address space, uses a combination of User-ID and C / T as an address, holds a 13-bit output VCI, and a corresponding output VCI is derived by addressing with the combination of User-ID and C / T. (To be output).

  In this example, the destination route includes an RRC (control unit 16) direction (in the case of DCCH) and a PDCP (service termination unit 15) direction (in the case of DTCH), and C / T is used by the user. For example, as shown in Table 9 below, different values for each user can be designated as RRC and PDCP directions.

  The sizes of the various tables described above are as shown in Table 10 below, for example.

Hereinafter, the destination determination (destination information generation) operation by the RNC 1 (common channel termination unit 13) of the present embodiment configured as described above will be described with reference to FIGS. The following destination determination operations are all performed by the processing unit (DSP) 133 (see FIG. 3).
First, when the RNC 1 receives the RACH at the common channel termination unit 13 (step S1 in FIG. 7), the processing unit 133 uses the RACH 13-bit Iub-VCI as a read address to the memory 132 (Cell-ID table: the table above). 4) is obtained (address designation) to obtain a compressed Cell-ID (7 bits) (arrow A in FIG. 6 and step S2 in FIG. 7).

On the other hand, the processing unit 133 accesses (address specification) the memory 132 (Proxy-ID table: see Table 6) with the C-RNTI (16 bits) of the received RACH as a read address (step in FIG. 7). S3) The compressed Proxy-ID (12 bits) is acquired (arrow B in FIG. 6 and step S4 in FIG. 7).
Next, the processing unit 133 combines the acquired two types of IDs (Cell-ID and Proxy-ID) to generate an address for the user ID table (see Table 7) (Step S5 in FIG. 7). Is used as a read address to access (address designation) the memory 132 (user ID table) (step S6 in FIG. 7) to obtain a compressed user ID (12 bits) (arrow C in FIG. 6 and step in FIG. 7). S7).

  Further, the processing unit 133 generates an address for the Iu-VCI table (see Table 8) in the memory 132 as a read address by combining the user ID acquired as described above and the C / T of the received RACH (FIG. 7). Step S8), using this as a read address, the memory 132 (Iu-VCI table) is accessed (address designation) (step S9 in FIG. 7), thereby obtaining the output VCI (13 bits) as final destination information. (Step D10 in FIG. 6 and arrow D in FIG. 7).

  The above destination determination (generation) processing flow is summarized in Table 11 below.

As described above, according to the present embodiment, necessary destination information is obtained by compressing input information using the characteristics of the input information and simply reading out the information by specifying the addresses of the memory 132 in stages. (Generation) can be performed, and it is not necessary to perform a search for any of the above tables.
[B] Registration / deletion of IDs Next, the registration / deletion of various IDs described above will be described below.

(B1) Cell-ID registration When setting RACH for a cell for the first time (registering RACH Iub-VCI), the Cell-ID is issued as it is, and the second and subsequent times (two or more RACHs are assigned to the same cell) In the case of setting), the previously issued ID is used.
The Cell-ID is registered in the Cell-ID table (see Table 4 above) using the RACH VCI as an address.

(B2) Proxy-ID registration
Read the Proxy-ID table (see Table 6 above) and check whether the same Proxy-ID has already been registered. If it is not registered (when it is used for the first time), the Proxy-ID is issued and the C-RNTI is set. Register the Proxy-ID in the Proxy-ID table as an address. On the other hand, if it is already registered (if already used by another user), nothing is done.

(B3) User-ID registration
Read the User-ID table and check whether the same User-ID is already registered. If it is not registered (when used for the first time), the User-ID is issued, and the Proxy-ID and the above Cell-ID Register User-ID in the User-ID table using as the address. On the other hand, if it has been registered (if the same user is already in use on another logical channel), nothing is done. Note that “in use by another logical channel” means, for example, a case where a user tries to additionally register a data channel (DTCH) in a state where the control channel (DCCH) is registered for connection.

(B4) Deleting Cell-ID
When deleting the RACH VCI, if there is another RACH VCI registered in the target cell, nothing is done. If no other RACH VCI is registered in the target cell, the Cell-ID is released, and the Cell-ID in the Cell-ID table is deleted using the RACH VCI as an address.
(B5) Deletion of Proxy-ID When releasing a connection, whether the target Proxy-ID (C-RNTI) is being used in another cell, that is, whether another user is using the same C-RNTI in another cell Check and release the target Proxy-ID if it is not used, and delete the Proxy-ID registered in the Proxy-ID table with C-RNTI as the address. On the other hand, nothing is done when in use.

(B6) Deletion of User-ID When releasing a connection, check whether the target User-ID is being used by another logical channel. If it is not used, release the target User-ID, Proxy-ID and Cell -Deletes the User-ID registered in the User-ID table using the ID as an address. On the other hand, nothing is done when in use. In this case as well, “in use by another logical channel” means, for example, a case where a user tries to delete a data channel (DTCH) while the connection of the control channel (DCCH) is registered. .

[C] Others The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described example, the case where the present invention is applied to an RNC configured based on ATM has been described. However, a device having a routing function configured based on another protocol (destination determination based on header information of received data is performed). If it is a necessary apparatus), it can be applied in the same manner as in the above example.

In the above-described example, both Iub-VCI (first information) and C-RNTI (second information) are compressed. However, even if only one of them is compressed, the required memory amount is reduced. be able to.
[D] Appendix (Appendix 1)
Received data including at least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. In a device having a function of routing the received data based on the header information of the received data, a method for generating destination information of the received data,
The fourth information is acquired by addressing the first table that holds the first information as an address, which is obtained by converting the first information into information necessary for specifying the radio cell in the device. Steps,
Obtaining the fifth information by addressing a second table holding the second information as an address, the fifth information obtained by converting the second information into information necessary for specifying the terminal in the device When,
The sixth information is acquired by addressing the third table that holds the fourth information and the fifth information as an address, the sixth information being the compressed information of the fourth information and the fifth information. And steps to
A destination stage generation method comprising the step of outputting the destination information by addressing a fourth table that holds the destination information with the set of the third information and the sixth information as an address.

(Appendix 2)
The destination stage generation method according to appendix 1, wherein the fourth information is information obtained by compressing the first information into an amount of information sufficient to identify the radio cell in the apparatus.
(Appendix 3)
The destination stage generation method according to appendix 1 or 2, wherein the fifth information is information obtained by compressing the second information into an amount of information sufficient to identify the terminal in the apparatus.

(Appendix 4)
Received data including at least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. Used for a device having a function of routing the received data based on the header information of the device, and generating destination information of the received data,
A first table that holds fourth information obtained by converting the first information into information necessary for identifying the wireless cell in the device, and using the first information as an address;
A second table for holding fifth information obtained by converting the second information into information necessary for identifying the terminal in the device, and using the second information as an address;
A third table for holding sixth information, which is compressed information of the set of the fourth information and the fifth information, as the address of the set of the fourth information and the fifth information;
A fourth table that holds the destination information using a set of the third information and the sixth information as an address;
The fourth information and the fifth information are obtained by addressing the first information and the second information with respect to the first table and the second table, and the fourth information and the fifth information with respect to the third table are acquired. Control means for acquiring the sixth information by addressing by a set of five information, acquiring and outputting the destination information by addressing by the third information to the fourth table and the addressing by the set of the sixth information; A destination stage generation device characterized in that it is provided.

(Appendix 5)
The destination stage generation device according to appendix 4, wherein the fourth information is information obtained by compressing the first information into an amount of information sufficient to identify the radio cell in the device.
(Appendix 6)
The destination stage generation device according to appendix 4 or 5, wherein the fifth information is information obtained by compressing the second information into an amount of information sufficient to identify the terminal in the device.

It is a block diagram which shows the principal part structure of the radio | wireless communications system which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the base station control apparatus (RNC) shown in FIG. FIG. 3 is a block diagram illustrating a configuration of a common channel termination unit illustrated in FIG. 2. It is a figure which shows the protocol stack in the common channel termination | terminus part shown in FIG.2 and FIG.3. It is a figure which shows the data format example of each protocol shown in FIG. It is a figure for demonstrating operation | movement (destination determination operation | movement) of the common channel termination | terminus part shown in FIG.2 and FIG.3. FIG. 4 is a flowchart for explaining the operation (destination determination operation) of the common channel termination unit shown in FIGS. 2 and 3. FIG.

Explanation of symbols

1 Base station controller (RNC)
11 Transmission / reception termination unit 12 Individual channel termination unit 13 Common channel termination unit 131 Transmission / reception unit 132 Memory 133 Processing unit (DSP)
134 Control unit (CPU)
14 device control channel termination unit 15 service termination unit 16 control unit 2 radio base station 3 radio mobile station (mobile terminal)

Claims (5)

Received data including at least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. In a device having a function of routing the received data based on the header information of the received data, a method for generating destination information of the received data,
The fourth information is acquired by addressing the first table that holds the first information as an address, which is obtained by converting the first information into information necessary for specifying the radio cell in the device. Steps,
Obtaining the fifth information by addressing a second table holding the second information as an address, the fifth information obtained by converting the second information into information necessary for specifying the terminal in the device When,
The sixth information is acquired by addressing the third table that holds the fourth information and the fifth information as an address, the sixth information being the compressed information of the fourth information and the fifth information. And steps to
A destination stage generation method comprising the step of outputting the destination information by addressing a fourth table that holds the destination information with the set of the third information and the sixth information as an address.   The destination stage generation method according to claim 1, wherein the fourth information is information obtained by compressing the first information to an amount of information necessary and sufficient to identify the radio cell in the apparatus.   3. The destination stage generation method according to claim 1, wherein the fifth information is information obtained by compressing the second information to an amount of information necessary and sufficient to identify the terminal in the apparatus. . Received data including at least first information for identifying a radio cell, second information for identifying a terminal in the radio cell, and third information for identifying a logical channel used by the terminal. Used for a device having a function of routing the received data based on the header information of the device, and generating destination information of the received data,
A first table that holds fourth information obtained by converting the first information into information necessary for identifying the wireless cell in the device, and using the first information as an address;
A second table for holding fifth information obtained by converting the second information into information necessary for identifying the terminal in the device, and using the second information as an address;
A third table for holding sixth information, which is compressed information of the set of the fourth information and the fifth information, as the address of the set of the fourth information and the fifth information;
A fourth table that holds the destination information using a set of the third information and the sixth information as an address;
The fourth information and the fifth information are obtained by addressing the first information and the second information with respect to the first table and the second table, and the fourth information and the fifth information with respect to the third table are acquired. Control means for acquiring the sixth information by addressing by a set of five information, acquiring and outputting the destination information by addressing by the third information to the fourth table and the addressing by the set of the sixth information; A destination stage generation device characterized in that it is provided.   5. The destination stage generation device according to claim 4, wherein the fourth information is information obtained by compressing the first information to an amount of information necessary and sufficient to identify the radio cell in the device.

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