Integrated medium access control device and physical layer device

• US 7,193,993 B2
• Filed: 05/23/2002
• Issued: 03/20/2007
• Est. Priority Date: 05/23/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Silvester, Kelan C.
• Primary Examiner(s): PHAM, BRENDA H
• Application Number:
  US10/155,413
• Publication Number:
  US 20030219033A1
• Time in Patent Office: 1,762 Days
• Field of Search: 370/310.1, 370/349, 370/386, 370/389, 370/395.5, 370401-402, 370/419, 370/471, 370/328, 370/254, 370/338, 370/359, 370/395.2, 370/395.3
• US Class Current: 370/359
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

According to one embodiment, the invention provides a medium access control device. The device comprises a processor to process data packets between a data link layer and a physical layer in accordance with a communications protocol; and a physical medium independent interface coupled to the processor to send and receive data packets to and from a physical layer device, the data packets being compatible with either a wired communications medium or a wireless communications medium used by the physical layer device as a communications medium.

Claims

1. A medium access control device comprising:

a processor to process data packets between a data link layer and a physical layer in accordance with a communications protocol;

a memory coupled to the processor to store a wireless communications protocol and a wired communications protocol;

a protocol control unit coupled to the processor to select a communications protocol to use;

a physical medium independent interface coupled to the processor to send and receive data packets to and from a physical layer device, the data packets being compatible with a physical medium being used by the physical layer device as a communications medium regardless of whether the physical medium is a wired medium or a wireless medium; and

a host interface configured to download a further communications protocol into memory in response to a communications protocol being used by the physical layer device.

2. The medium access control device of claim 1, wherein the further communications protocol is selected from the group consisting of a new protocol or an updated protocol.

3. The medium access control device of claim 1, further comprising a transmit and receive flow control unit coupled to the processor to monitor a transmit queue of data packets waiting in a transmit buffer to be sent to the physical layer device after processing, and a receive queue of data packets waiting in a receive buffer to be processed after being received from the physical layer device;

and to send a request to a memory controller to dynamically readjust transmit and receive buffer parameters in response.

4. The medium access control device of claim 3, wherein the transmit and receive buffer parameters comprise a size and a number of the transmit and receive buffers respectively.

5. The medium access control device of claim 4, wherein said request comprises a request to increase the number and size of the transmit and receive buffers respectively, if the transmit and receive queues are too high in relation to a statistically observed norm.

6. The medium access control device of claim 4, wherein said request comprises a request to decrease the number and size of the transmit and receive buffers respectively, if the transmit and receive queues are too low in relation to a statistically observed norm.

7. The medium access control device of claim 6, further comprising a power management unit to turn off units of the device that are not being used.

8. The medium access control device of claim 1, further comprising an encryption and decryption unit coupled to the processor to encrypt and decrypt the data packets using encryption and decryption algorithms stored in memory, the encryption and decryption unit being configured to dynamically download via the host interface a further encryption and decryption algorithm to allow encryption and decryption of data packets in accordance with said further encryption and decryption algorithm, the downloading being in response to a received request.

9. The medium access control device of claim 1, further comprising the physical layer device which is integrated therewith.

10. The medium access control device of claim 9, wherein the physical layer device includes a wireless communications interface and a wired communications interface.

11. The medium access control device of claim 10, wherein the physical layer device includes a detection unit to detect which communications interface is to be used.

12. The medium access control device of claim 11 further comprising a power management unit to selectively turn off those communications interfaces that are not being used.

13. The medium access control device of claim 1, wherein the communications protocol is selected from the group consisting of the standards known as IEEE 802.11, and IEEE 802.3.

14. A medium access control device comprising:

a physical medium interface to support communications with a physical layer device;

a processor to control the physical medium interface, wherein said physical medium interface and processor provide a wireless operating mode in which data is sent and received by the physical medium interface in accordance with a wireless communications protocol, and a wired operating mode in which said data is sent and received by the physical medium interface in accordance with a wired communications protocol; and

a power management unit to selectively turn off components of the device that are not required for a particular operating mode;

an encryption and decryption unit to encrypt and decrypt data in accordance with an encryption and decryption algorithm, said encryption and decryption algorithm being dynamically updateable.

15. The medium access control device of claim 14, further comprising the physical layer device which is integrated therewith.

16. The medium access control device of claim 14, wherein the physical layer device includes communications interfaces to support communications according to said wired and said wireless communications protocols.

17. The medium access control device of claim 14, further comprising a detection unit to detect which interfaces and protocols are required based on a configuration of the device.

18. The medium access control device of claim 14, wherein the communications protocol used in each mode are dynamically updateable.

19. The medium access control device of claim 14, wherein a memory allocation for each mode is dynamically adjustable to optimize memory usage.

20. A medium access control device comprising:

a first means for processing data packets between a data link layer and a physical layer in accordance with a communications protocol;

a second means coupled to said first means to store a wireless communications protocol and a wired communications protocol;

a third means coupled to said first means to select a communications protocol to use; and

a fourth means coupled to said first means to send and receive data packets from a physical layer device, the data packets being compatible with a physical medium being used by the physical layer device as a communications medium regardless of whether the physical medium is a wired medium or a wireless; and

a fifth means to download a further communications protocol into said second means in response to a communications protocol being used by the physical layer device.

21. The medium access control device of claim 20, wherein the further communications protocol is selected from the group comprising the new protocol or an updated protocol.