Synchronized plural channels for time division duplexing

• US 7,068,639 B1
• Filed: 09/19/2000
• Issued: 06/27/2006
• Est. Priority Date: 09/19/2000
• Status: Expired due to Term

• Current Assignee: Monument Bank of Intellectual Property, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Aperto Networks
• Inventors: Varma, Subir, Hakim, Joseph
• Primary Examiner(s): Duong, Frank
• Application Number:
  US09/664,029
• Time in Patent Office: 2,107 Days
• Field of Search: 370/337, 370/347, 370/350, 370/431, 370/442, 370/463, 370/464, 370/465, 370/468, 370/503
• US Class Current: 370/347
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

Abstract

A method of managing TDD across plural channels. In the method, frames are synchronized across the plural channels so that upstream frames and downstream frames coincide across the plural channels. Preferable, one channel is assigned to each of plural CPEs. Each CPE receives MAP messages on its assigned channel. A base station controller preferably generates the MAP messages. The MAP messages instruct the CPEs to switch channels so as to receive data bursts. The base station controller preferably includes a centralized scheduler that allocates channels and slots in those channels to the CPEs for receipt of the data bursts. Also, a method of receiving TDD messages. According to the method, CPEs switch channels based on received media access protocol messages so as to receive data bursts on plural channels. The channel to which a CPE switches need not be the same channel as the one on which the CPE receives its MAP messages. Additionally, systems, base stations, CPEs, and/or software that utilizes and/or implements these methods.

Claims

1. A method of receiving time division duplexed messages comprising the steps of:

switching channels based on received media access protocol messages so as to receive data bursts on plural channels;

receiving a first media access protocol message at a CPE over a first time division multiple access channel, the media access protocol message instructing the CPE to receive a data burst over a second time division multiple access channel, the second channel being different from the first channel; and

receiving the data burst at the CPE over the second time division multiple access channel;

wherein the step of switching comprises switching from the first time division multiple access channel to the second time division multiple access channel in response to the media access protocol message.

2. A method as in claim 1, wherein the first media access protocol message further instructs the CPE to send upstream data to a base station over the second time division multiple access channel, the method further comprising:

sending an upstream data burst from the CPE to the base station over the second time division multiple access channel.

3. A method as in claim 2, wherein the step of receiving the data burst is performed during a first downstream frame, the step of sending is performed during a second upstream frame that immediately follows the first downstream frame so that there are no frames between the first downstream frame and the second upstream frame.

4. A method as in claim 2, further comprising:

synchronizing the upstream data burst from the CPE with another upstream data burst from another CPE.

5. A method as in claim 2, wherein the first media access protocol message further instructs another CPE to send upstream data to the base station over the first time division multiple access channel, the method further comprising:

synchronizing the upstream data burst from the CPE with an upstream data burst from said another CPE.

6. A method as in claim 1, wherein the steps of receiving a first media access protocol message and receiving the data burst are performed during the same downstream frame.