Broadband adaptation processing

• US 5,606,552 A
• Filed: 10/17/1994
• Issued: 02/25/1997
• Est. Priority Date: 10/17/1994
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Dravida, Subrahmanyam, Baldwin, John H.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Nguyen, Chau T.
• Application Number:
  US08/323,958
• Time in Patent Office: 862 Days
• Field of Search: 370/79, 370/82, 370/83, 370/99, 370/102, 370/60, 370/60.1, 370/94.1, 370/68.1, 370/110.1, 370/94.2, 375/200, 375/205
• US Class Current: 370/474
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5652 Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
• CPC Class Codes: H04L 2012/5672 Multiplexing, e.g. coding, scrambling
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A method and apparatus for enabling one or more packets (e.g., CDMA packets, CDPD packets etc.) to be encapsulated into a cell (e.g., an ATM cell, a B-ISDN cell) for transmission and/or reception over a broadband network (e.g., an ATM Channel). An illustrative method includes building a basic control octet for a packet of N bytes, the basic control octet including (1) an additional control bit that indicates if a supplemental control octet accompanies the basic control octet, and (2) a length indicator based on N.

Claims

1. A method for generating a cell payload based on a user packet comprising N octets (where N is a positive integer), said method comprising:

building a basic control octet which comprises;

(1) an additional control bit that indicates if a supplemental control octet accompanies said basic control octet, and

(2) a length indicator based on N;

packing said basic control octet and said user packet into said cell payload; and

padding any unused portion of said cell payload with copies of said basic control octet.

2. A method for generating a cell payload based on a first user packet comprising M octets (where M is a positive integer) and a second user packet comprising N octets (where N is a positive integer), said method comprising:

building a first basic control octet which comprises;

(1) an additional control bit that indicates if a first supplemental control octet accompanies said first basic control octet,

(2) a length indicator based on M;

building a second basic control octet which comprises;

(1) an additional control bit that indicates if a second supplemental control octet accompanies said first basic control octet,

(2) a length indicator based on N; and

packing said first basic control octet, said first user packet, said second basic control octet and said second user control packet into said cell payload.

3. The method of claim 2 wherein:

said first basic control octet further comprises a parity bit based on said additional control bit and said length indicator M, and

said second basic control octet further comprises a parity bit based on said additional control bit and said length indicator N.

4. The method of claim 2 wherein said step of packing further comprises concatenating said first basic control octet, said first user packet, said second basic control octet and said second user control packet.

5. The method of claim 4 wherein said step of packing further comprises aligning said first basic control octet, said first user packet, said second basic control octet and said second user control packet with a boundary of said cell payload.

6. The method of claim 5 further comprising the step of padding any unused portion of said cell payload with copies of said first basic control octet and said second basic control octet.

7. A method for generating a cell payload based on a user packet, which is associated with a logical link Q and which comprises N octets (where N is a positive integer), said method comprising:

building a basic control octet that comprises;

(1) an additional control bit that indicates if a supplemental control octet accompanies said basic control octet, and

(2) a length indicator based on N;

building a supplemental control octet that comprises;

(1) an additional control bit that indicates if an ancillary control octet accompanies said supplemental control octet, and

(2) a logical link indicator based on Q;

packing said basic control octet, said supplemental control octet and said user packet into said cell payload.

8. The method of claim 7 wherein:

said basic control octet further comprises a parity bit based at least on said length indicator; and

said supplemental control octet further comprises a redundancy field based at least on said logical link indicator.

9. The method of claim 7 wherein said step of packing further comprises:

concatenating said basic control octet, said supplemental control octet and said user packet; and

aligning said basic control octet, said supplemental control octet and said user packet with a boundary of said cell payload.

10. The method of claim 9 further comprising the step of padding any unused portion of said cell payload with copies of said basic control octet and said supplemental control octet.