KR101302569B1 - Apparatus and Method for Host Interface - Google Patents

Abstract

The present invention discloses a host interface device and method. According to an aspect of the present disclosure, a host interface device may set at least one memory block in a memory pool as a transmission sharing area, and set at least one memory block not set as the transmission sharing area in the memory pool as a reception sharing area. A modem; Query the modem to confirm sharing information on the transmission sharing area and the reception sharing area, store transmission packets in the transmission sharing area with reference to the sharing information, and transmit them to the modem; A host that reads a received packet from the receive sharing area and receives the received packet from the modem, wherein the modem is configured to store at least the received packet received by the host even if all received packets are not read. And returning one memory block to the memory pool, and resetting the other at least one memory block in the memory pool to the reception sharing area when the received packet is further received.

Description

Apparatus and Method for Host Interface

The present invention relates to an interface between a host and a modem. More particularly, the present invention relates to a host interface device and a method for improving a memory block shortage during a transmission and reception process.

In general, wired and wireless modems are used for data transmission and reception of a host. The host can pass data to the wired or wireless modem through a series of operations that either write or read data to the modem.

As shown in FIG. 1, a conventional host is connected to a modem via a parallel bus, writes data to a modem, reads a communication, and confirms data transmission and reception by interrupts TX_REQ and TX_DONE. . The host uses a microprocessor to control the modem, which is connected to the host via a host interface. In this case, the host interface may be a personal computer memory card international association (PCMCIA), a parallel bus, a local bus, and the like, and include a data transmission / reception interface and an interrupt interface. The host can also be a PC, a notebook, as well as other embedded systems.

The conventional modem transmits a packet received from the host to the host interface sharing area to the outside, or receives a signal from the outside and transmits the packet to the host through the host interface sharing area. In this case, the modem may receive a signal from the outside or transmit a signal to the outside through only various preset communication such as a power line or a LAN.

In a transmission process, a conventional host writes a packet to be transmitted to a memory block connected to a descriptor of a TX shared region of a modem, sends a TX_REQ interrupt to the modem, and then the modem Wait for the TX_DONE interrupt to be sent after sending the packet to the send buffer to send the packet. Then, when the TX_DONE interrupt is received, the process returns to the beginning and continues the transmission process.

In a conventional modem, a packet received from an external device is stacked in a memory block connected to a descriptor of an RX shared region, and when some packets are accumulated, the modem transmits an RX_REQ interrupt to the host. When a conventional host receives an RX_REQ interrupt, it reads all received packets from a memory block connected to a descriptor of a receiving shared area, and then transmits an RX_DONE interrupt to a modem. The modem then returns the memory blocks associated with the descriptor to the memory pool so that the memory blocks can be recycled.

Conventional modems are configured such that the number of descriptors in the transmission sharing area is secured in advance by about five defaults in order to transmit many packets at once, and the host can always transmit a plurality of packets at one time.

However, since a modem shares a memory pool for transmission and reception processing, a problem arises that the memory block for the reception procedure is insufficient when the transmission procedure is performed.

In addition, the conventional modem reads all the plurality of descriptors in the reception sharing area and then transmits an RX_DONE interrupt to release the memory block of the modem. Thus, the memory block is insufficient in the memory pool.

This phenomenon causes a problem that the interface speed between the host and the modem is slower than the modem speed, and thus, the modem communication speed is lowered. For example, when the communication speed of the modem is 50 Mbps, if the interface speed between the host and the modem is less than 50 Mbps, the communication speed is lowered.

Moreover, the communication speed of the modem is getting faster, and the slowing down of the interface between the host and the modem may become more issue.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described technical background, and provides a host interface device and method for rapidly returning a memory block to a memory pool when reception of a packet stored in a memory block connected to one descriptor is completed. For that purpose.

According to an aspect of the present disclosure, a host interface device may set at least one memory block in a memory pool as a transmission sharing area, and set at least one memory block not set as the transmission sharing area in the memory pool as a reception sharing area. A modem; Query the modem to confirm sharing information on the transmission sharing area and the reception sharing area, store transmission packets in the transmission sharing area with reference to the sharing information, and transmit them to the modem; A host that reads a received packet from the receive sharing area and receives the received packet from the modem, wherein the modem is configured to store at least the received packet received by the host even if all received packets are not read. And returning one memory block to the memory pool, and resetting the other at least one memory block in the memory pool to the reception sharing area when the received packet is further received.

According to another aspect of the present invention, a host interface device stores a control command in a control buffer of a shared area with reference to shared information, and then transmits a control request interrupt. A host for reading a control result corresponding to the control command from the host; And providing the shared information according to a request of the host, performing an event according to the control command upon receiving the control request interrupt, and storing the control result in the report buffer after completing the event. And a modem for transmitting a control completion interrupt, wherein the transmission of the control command by the host and the reporting of the control result by the modem are performed in an asynchronous manner.

According to another aspect of the present invention, a method of receiving a packet by a host may include receiving a request interrupt indicating that there is a packet received from a modem, and referring to shared information, at least one descriptor of a reception sharing area and at least one connected to the descriptor. Reading packets one by one from a memory block; And instructing the modem to return the descriptor storing the read packet and the memory block to the memory pool if the descriptor storing the read packet and the memory block exist, even if all the received packets are not read. It is characterized by including the step.

According to the present invention, the availability of the memory pool can be improved by quickly releasing the memory blocks used in the transmission process and the reception process, and the memory block shortage can be improved. Therefore, the present invention can prevent the problem of communication speed degradation due to the data exchange rate between the conventional host and the modem.

In addition, according to the present invention, the host may transmit a control command to the modem and receive a report corresponding to the control command from the modem, thereby supporting ease and diversification of modem control by the user.

1 illustrates an interface between a conventional host and a modem.
Figure 2a is a block diagram showing the detailed configuration of the modem of the present invention.
2B is a diagram illustrating a relationship between shared information and a shared area of the present invention.
3 is a flowchart illustrating a method of obtaining shared information of the present invention.
4 is a diagram illustrating a packet transmission procedure of a host of the present invention.
5 is a diagram illustrating a packet reception procedure of a host of the present invention.
6 is a diagram illustrating a control command transmission procedure of a host of the present invention.
7 is a diagram illustrating a procedure for receiving a control result of a host of the present invention.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 2A is a block diagram illustrating a host interface device according to an exemplary embodiment of the present invention, and FIG. 2B is diagram illustrating shared information according to an exemplary embodiment of the present invention.

As shown in FIG. 2A, a host interface device 10 according to an embodiment of the present invention includes a host 100 and a modem 200.

The modem 200 includes a memory pool 250, a control unit 210, a shared information storage unit 220, a transmission sharing area 230, and a reception sharing area 240. In FIG. 2A, a case where the memory pool 250 is included in the modem 200 has been described as an example. However, the memory pool 250 may exist outside the modem 200. In addition, although FIG. 2A illustrates that the transmission sharing area 230 and the reception sharing area 240 exist separately from the memory pool 250 for convenience of description, in fact, the transmission sharing area 230 and the reception sharing area ( The region shared by the host 100 among the descriptors and the memory blocks of the memory pool 250 of FIG. 240 is illustrated separately.

The memory pool 250 includes a plurality of descriptors and a plurality of memory blocks connected (linked) to each descriptor. In this case, the descriptor stores a packet parameter such as a packet size, and the memory block stores actual data of a packet to be transmitted and received.

When the control unit 210 receives a QUERY interrupt from the host 100, the controller 210 determines a descriptor to be used for transmission and reception, sets information on a shared area including an address of a descriptor to be used for transmission and reception, and then shares the information storage unit 220. The query completion interrupt is transmitted to the host 100.

In addition, the controller 210 sets a descriptor (and a memory block) of the transmission sharing area 230 and the reception sharing area 240 in the memory pool 250, and transmit transmission area 230 and the reception sharing area 240. A packet received from the outside is transmitted and received to the host 100 using a descriptor (and a memory block), and the used descriptor (and memory block) is returned to the memory pool 250 by referring to the shared information.

The sharing information storage unit 220 stores the information of the transmission sharing area and the information of the reception sharing area as shown in FIG. 2B, and may be set by the controller 210 or the host 100. Hereinafter, each shared information will be described.

BlockCountPerDesc is the number of memory blocks connected to one descriptor and is variably set by the controller 210. In general, the number of memory blocks is determined by one descriptor so that the total capacity of the memory blocks is one packet size. It is set to be abnormal. In the following specification, BlockCountPerDesc is The case where it is set to "2" is demonstrated as an example.

BlockSize is a size of a memory block is the size of the storage space of each memory block, for example, may be a byte unit.

* TXDesc may be variably set by the descriptor is the start address, the control unit 210 of the transmission share.

* RxDesc is a descriptor start address of the reception sharing area, and can be variably set by the controller 210.

RxDescCount is the number of received descriptors received from the outside (that is, the number of received packets) and is set by the controller 210. The RxDescCount is initialized to 0 when receiving the RX_END interrupt and counts the number of received packets after initialization. .

RxDoneCount is the number of reception descriptors received from the reception sharing area 240 to the host 100 and is set by the host 100.

RxEndCount is the number of descriptors that have been received (returned) last by the host 100 after transmitting a reception interrupt, and is set by the host 100.

RxDoneFlag indicates whether return a processing state of the reception completion (RX_DONE) interrupt, a memory block is connected to the reception descriptor of the number recorded in the R x EndCount to the memory pool 250, and is set by the control unit 210.

When the RxDoneFlag is set to 1 by the host 100 and the modem 200 confirms that the RxDoneFlag is set to 1, the RxDoneFlag returns memory blocks corresponding to the number of set descriptors of RxEndCount and RxEndCount to the memory pool, and RxDoneFlag is 0. Set to. In the present specification, the case where the modem 200 is returning a memory block when RxDoneFlag is 1 has been described as an example, but is not limited thereto.

* H2FCntl: the host 100 as the address of the control command transmission buffer for inputting a control command to be transmitted to the modem 200, and a fixed address, the host 100 is set to transmit a control command to the modem 200 .

* F2HCntl : Address of a control result report buffer for inputting a control command transmitted from the modem 200 to the host 100, which is a fixed address, and the modem 200 performs a process corresponding to the control command to the host 100. It is set when reporting on it.

Hereinafter, a process of transmitting and receiving data between a host and a modem according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 is a flowchart illustrating a method of obtaining sharing information of a host according to an embodiment of the present invention.

Referring to FIG. 3, the host 100 transmits a QUERY interrupt for shared information to the modem 200 (S310).

When the modem 200 receives the query interrupt, the modem 200 sets the shared information that is not set in the shared information storage unit 220, and then transmits a query completion (QUERY_DONE) interrupt, and the host 100 receives the query completion interrupt ( S320).

At this time, the modem 200 includes the number of memory blocks (BlockCountPerDesc) connected to the descriptor, the size of the memory blocks (BlockSize), the transmit / receive control command buffer address (* H2FCntl and * F2HCntl), and the descriptor start address (* TXDesc and * RxDesc), and initialize the transmission descriptor settings (RxDescCount, RxDoneCount, RxEndCount, and RxDoneFlag) used in the reception process. At this time, the address of the transmission / reception control command buffer is fixed, the number of memory blocks connected to the descriptor, the size of the memory blocks are set at the time of initialization of the modem 200, and the start address of the descriptor of the transmission / reception sharing area is the memory pool ( It may be variable depending on which descriptor of 250) is used.

When the host 100 receives the query completion interrupt, the host 100 reads the shared information from the address of the shared information storage unit 220 already known (Read) of the host interface (S330).

Hereinafter, a packet transmission procedure of the host will be described with reference to FIG. 4. 4 is a diagram illustrating a packet transmission procedure after acquiring shared information of a host according to an embodiment of the present invention (configuration and flowchart).

4 illustrates a single transmission process (after transmission of a transmission request interrupt and before reception of a transmission completion interrupt) in consideration of a characteristic in which transmission speed is not a big problem but reception speed is mainly a problem in packet transmission and reception of a host through the modem 200. In the example, only one transmission descriptor is provided to transmit a single packet. Therefore, in FIG. 4, the host 100 and the modem 200 transmit one packet in one transmission process.

Referring to FIG. 4, the host 100 stores a packet to be transmitted through the modem 200 in a memory block connected to the transmission descriptor with reference to the transmission descriptor start address (S410).

Specifically, the host 100 stores a size of a packet to be transmitted in a length field of a transmission descriptor with reference to a transmission descriptor start address, and MAC header of a memory block connected (linked) to the transmission descriptor. The destination ID of the packet is written in the destination ID (dstID) field, and the packets corresponding to the size recorded in the length field are sequentially written after the MAC header of the memory block. In this case, when a plurality of memory blocks are connected to one transmission descriptor, the second memory block may not include the destination ID field of the MAC header.

The host 100 transmits a transmission request (TX_REQ) interrupt to the modem 200 so that the modem 200 transmits the packet to the outside after storing the packet to be transmitted in the memory block connected to the transmission descriptor (S420).

The host 100 waits without transmitting the next packet until the transmission completion (TX_DONE) interrupt is received from the modem 200 (S430). At this time, the modem 200 performs a transmission buffer process for transmitting the packet of the memory block to the outside, and transmits a transmission completion interrupt.

When the host 100 receives the transmission completion interrupt, the host 100 transmits a subsequent packet to be transmitted through steps S410 through S430 (S440). In this case, if the host 100 no longer has a packet to transmit, the host 100 ends the transmission procedure.

Hereinafter, a packet receiving procedure of a host according to an embodiment of the present invention will be described with reference to FIG. 5. 5 is a diagram illustrating a packet receiving procedure after acquiring shared information of a host according to an exemplary embodiment of the present invention (configuration and flow chart).

Referring to FIG. 5, the host 100 waits for a reception request interrupt without performing an interface operation with the modem 200 (S500).

The host 100 receives a reception request (RX_REQ) interrupt transmitted by the modem 200 to request that the received packet is received (S510).

The host 100 initializes its own variables RxCount (set the number of descriptors read after the receive request interrupt before the receive interrupt) and ReadCount (set the number of descriptors read after the receive request interrupt before the receive interrupt). (S520).

The host 100 reads one received packet from a memory block connected to the received descriptor with reference to the received descriptor start address, and then increments RxCount and ReadCount by 1 corresponding to the number of received packets (S530).

Specifically, the host 100 grasps the size of a received packet from the length field of the reception descriptor corresponding to the reception descriptor start address. In this case, the host 100 may read transmission / reception channel information (RSSI, SNR) from the RSSI field and the SNR field of the reception descriptor as necessary. Subsequently, the host 100 obtains a source ID for transmitting the received packet from the MAC header of the first memory block connected to the reception descriptor, and pays for the received packet corresponding to the size of the received packet from after the MAC header of the memory block. Read the load. In this case, since the memory blocks are linked to each other, the host 100 may read the received packet while following the link between the memory blocks.

After increasing the RxCount and ReadCount by 1, the host 100 checks whether the RxDoneFlag of the shared information storage unit 220 is 0 (S540).

When the RxDoneFlag is 0, the host 100 sets the RxDoneFlag of the shared information storage unit 220 to 1, sets the number of descriptors read in RxDoneCount of the shared information storage unit 220 (RxCount), and sets RxCount to 0. After the initialization, the reception completion (RX_DONE) interrupt is transmitted (S550). Upon receiving the reception interrupt, the modem 200 returns a memory block corresponding to RxDoneCount to the memory pool, initializes RxDoneCount to 0, and sets RxDoneFlag to 0.

The host 100 checks whether the number of read descriptors (ReadCount) is less than RxDescCount of the shared information storage unit 220 and checks whether there are more descriptors to be read from the modem 200 (S560).

If the host 100 no longer has a descriptor to be read from the modem 200 (when all packets received by the modem 200 have been read), the host 100 reads the RxEndCount of the shared information storage unit 220. After changing the RxCount, which is the number of descriptors read since the occurrence of the last reception interrupt, the RxCount is transmitted to the modem 200, and the packet reception procedure is terminated (S570). When the modem 200 receives the reception termination interrupt, the modem 200 returns a memory block corresponding to the number set in RxEndCount to the memory pool.

On the other hand, when the host 100 checks that the RxDoneFlag is not 0 after reading the received packet, the host 100 checks whether the number of read descriptors (ReadCount) is less than RxDescCount of the shared information storage unit 220 (S560). It constantly reads packets from the memory block attached to the next descriptor.

In addition, if the host 100 has more descriptors to be read as a result of checking in step S560, the host 100 performs steps S520 to S560 for the next descriptor.

In the above-described reception procedure, when the modem 200 returns the memory block connected to the descriptor to the memory pool, the modem 200 resets the start address of the reception descriptor, and the host 100 checks the start address of the changed reception descriptor while performing the reception procedure. Read

When the modem 200 additionally receives a packet after finishing the reception procedure, the modem 200 additionally receives the packet through the above-described steps (S510) to (S570).

Meanwhile, the host 100 of the present invention may control the modem 200 through a control command transmission buffer and a control result report buffer, and receive a result of performing an event corresponding to the control command from the modem 200. 6 and 7, a control command transmission and reception procedure of a host according to an embodiment of the present invention will be described.

6 is a diagram illustrating a control command transmission procedure of a host according to an embodiment of the present invention.

Referring to FIG. 6, if there is a control command to instruct the modem 200 (S610), the host 100 writes a control command to the control command transmission buffer H2FCNTL identified from the shared information (S620). In this case, the control command may be an indication of various events performed by the modem 200 such as initialization, scan request for a specific channel, piconet control, synchronization request, resource allocation, and specific information request.

After storing the control command in the control command transmission buffer, the host 100 transmits the control request (CNTL_REQ) interrupt to the modem 200 (S630).

Even if there is a control command to be transmitted to the modem 200, the host 100 waits until it receives the control completion interrupt CNTL_DONE without transmitting (S640). In this case, when the modem 200 is capable of receiving another control command in the control command transmission buffer, for example, when the control command is confirmed and an event according to the control command is started, the modem 200 may transmit a control completion interrupt.

When the host 100 receives the control completion interrupt, the host 100 checks whether there is a control command to additionally instruct (S650).

7 is a diagram illustrating a procedure for receiving a control result of a host according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the host 100 does not perform an interface operation with the modem 200 and waits for a NOTIFY interrupt (S700).

The modem 200 performs an event according to a control command, writes a content to be reported as a result of the execution of the event in the control result report buffer F2HCNTL, transmits a NOTIFY interrupt, and the host 100 receives a report interrupt. (S710).

When the host 100 receives the report interrupt, the host 100 checks the result corresponding to the control command from the control result report buffer F2HCNTL (S720).

After checking the result corresponding to the control command, the host 100 transmits a report completion (NOTIFY_DONE) interrupt (S730).

Meanwhile, the host 100 may process the control command transmission process of FIG. 6 and the control result reception process of FIG. 7 in an asynchronous manner.

In the above-described example, a descriptor is set in the transmission sharing area and the reception sharing area during the transmission and reception of a packet between the host and the modem. For example, when a descriptor is not required for transmission and reception, only a memory block is used as the transmission and reception sharing area. Of course you can.

As described above, the present invention can quickly release the memory block in the reception procedure, thereby increasing the availability of the memory block and improving the shortage of the memory block.

In addition, in the present invention, the host may transmit a control command to the modem and receive a result corresponding to the control command from the modem, thereby providing diversity and ease of modem control by the user.

While the present invention has been described in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the above-described embodiments. Those skilled in the art will appreciate that various modifications, Of course, this is possible. Accordingly, the scope of protection of the present invention should not be limited to the above-described embodiments, but should be determined by the description of the following claims.

Claims (11)

A modem configured to set at least one memory block in a memory pool as a transmission sharing area, and set at least one memory block not set as the transmission sharing area in the memory pool as a reception sharing area; And
Query the modem to confirm sharing information for the transmission sharing area and the reception sharing area, store transmission packets in the transmission sharing area with reference to the sharing information, and transmit them to the modem; A host reading a packet from the receiving sharing area and receiving the received packet from the modem,
The modem may return the at least one memory block in which a received packet received by the host is stored to the memory pool even if the received packet is not read in all, and if the received packet is further received, another modem from the memory pool. And resetting at least one memory block to the receive sharing area. The method of claim 1,
The sharing information includes information of a memory block set as the transmission sharing area,
The host stores the transmission packet in the at least one memory block of the transmission sharing area with reference to the information of the memory block, waits after outputting a transmission request interrupt, and then receives a transmission completion interrupt. Store the transmission packet in at least one memory block of the transmission sharing area,
The modem may transmit the transmission completion interrupt after processing the transmission buffer to transmit the transmission packet in the at least one memory block of the transmission sharing area to the outside when the transmission request interrupt is confirmed. . The method of claim 1,
The sharing information includes information of a memory block set as the reception sharing area, the number of packets received by the modem from the outside, the number of packets transmitted from the reception sharing area to the host, and the processing status of the reception completion interrupt. ,
When the host receives a reception request interrupt from the modem, the host sequentially reads the reception packet from the first memory block of the reception sharing area by referring to the information of the memory block, and then counts the number of the received reception packets. Change and set the number of delivered packets, and output a reception interrupt to instruct the modem to return a memory block storing the received packet to the memory pool, and receive from the shared information to the modem. Confirming that all the received packets have been read, finally set the number of forwarded packets, output a reception interrupt, terminate the reception process,
The modem may return a memory block corresponding to the number of delivered packets to the memory pool when the received interrupt is confirmed, and when the reception interrupt is confirmed, the memory corresponding to the number of the last delivered packets. Returning a block to the memory pool, and resetting information of the memory block if there is a memory block returned to the memory pool or if the reset memory block is present. The method of claim 3, wherein the host,
Check whether the modem is returning a memory block corresponding to the forwarded packet from the processing state of the reception completion interrupt; if the memory block is not returning, change the number of forwarded packets and set the received number; Outputs a completion interrupt,
If the memory block is being returned, increasing the number of received packets received and not outputting the received interrupt, and reading the subsequent received packets from the memory block in which the received packets are stored after the read received packets. Host interface device. After the control command is stored in the control buffer of the shared area with reference to the shared information, the control request interrupt is transmitted. When the control completion interrupt is received, the control result corresponding to the control command is read from the report buffer by referring to the shared information. Host; And
The shared information is provided according to a request of the host, and upon receiving the control request interrupt, an event according to the control command is performed, and when the execution of the event is completed, the control result is stored in the report buffer and the control is performed. Includes a modem that sends a completion interrupt,
And sending the control command by the host and reporting the control result by the modem are performed in an asynchronous manner. The method of claim 5, wherein the control command,
Host interface device including instructions for performing an event by the modem, such as initialization, specific channel scan, control of the piconet, resource allocation, and specific information request. As a packet reception method of the host,
Reading a packet from a descriptor of a reception sharing area and at least one memory block connected to the descriptor by referring to sharing information when receiving a reception request interrupt indicating that there is a packet received from a modem;
Instructing the modem to return the descriptor storing the read packet and the memory block to the memory pool if the descriptor storing the read packet and the memory block exist, even if all the received packets are not read.
Packet receiving method comprising a. The method of claim 7, wherein
Querying the modem for information on at least one memory block set as a reception sharing area among the plurality of memory blocks in the memory pool, the number of packets received by the modem, the number of memory blocks to return, and the processing status of a reception interrupt; Checking the sharing information including a
Packet receiving method further comprising. 9. The method of claim 8,
In the reading step, when the reception request interrupt is received from the modem, the packet is read one by one from the at least one memory block of the reception sharing area with reference to the sharing information, and then the packet is read from the reception sharing area. Counting the number of memory units, increasing the number of memory blocks to be returned, and checking whether the modem is returning the memory blocks to be returned by checking the processing status of the reception interrupt.
And the indicating step includes a second step of instructing the modem to output the received interrupt to return the memory block to be returned to the memory pool if the modem is not returning the memory block. The number of memory blocks to be returned is set to the number of packets read from the reception sharing area by the host from the reception of the reception request interrupt until the transmission of the reception interrupt.
After confirming whether the returning step and the indicating second step are performed at least once, the indicating step includes: checking whether the number of received packets and the number of read packets are the same from the shared information; If it is confirmed that the same, the process of receiving the packet from the receiving sharing area by setting the number of packets read after transmitting the previously received reception interrupt to the number of the memory block to be returned, and outputting the reception interrupt Step to end
Packet receiving method comprising a. 10. The method of claim 9, wherein checking whether the return is being performed,
If the modem determines that the memory block to be returned is being returned, increasing the number of memory blocks to be returned without outputting the reception interrupt; And
Reading a subsequent received packet from at least one memory block of the receiving sharing area, and then checking a processing status of the received interrupt;
Packet receiving method comprising a. 10. The method of claim 9,
When the modem returns the block of memory to be returned to the memory pool, initializing the number of memory blocks to be returned.
Packet receiving method further comprising.

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