US 6,636,488 B1 · Automatic retransmission and error recovery for packet oriented point-to-multipoint communication

Abstract

Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame. The BSC dynamically and adaptively determines new selected parameters for automatic retransmission, in response to conditions of a wireless communication link with each independent CPE. The BSC dynamically and adaptively allocates acknowledgement time slots within the upstream portion of the TDD frame, for use by each selected CPE. The BSC allocates some portion of the upstream bandwidth as a shared resource and some portion of the upstream bandwidth as unshared when there are messages received but not yet acknowledged. The BSC dynamically and adaptively response to acknowledgement and non-acknowledgement messages from each selected CPE, to integrate the automatic retransmission protocol with the TDD frame and the TDMA technique used within that frame.

Claims18

Dependent claims

A method of dynamically and adaptively responding to messages in a point-to-multipoint wireless communication link between a base station controller and plural customer premises equipment, the communication link having an upstream portion for communicating data from the customer premises equipment to the base station controller and a downstream portion for communicating data from the base station controller to the customer premises equipment, the method comprising the steps of:

setting a first timeout duration each time the base station controller receives a non-acknowledgement message from a selected customer premises equipment, wherein during the is first timeout duration, the base station controller discards further acknowledgement and non-acknowledgement messages from the selected customer premises equipment;
and
setting a second timeout duration each time the base station controller receives an invalid message from the selected customer premises equipment, wherein during the second timeout duration, the base station controller discards all further messages received from the selected customer premises equipment.

A base station controller, comprising:

a transmitter and receiver that sends and receives information including messages;
a processor that executes instructions to control the transmitter and receiver;
a memory that stores information including instructions to respond dynamically and adaptively to the messages in a point-to-multipoint wireless communication link between the base station controller and plural customer premises equipment, the communication link having an upstream portion for communicating data from the customer premises equipment to the base station controller and a downstream portion for communicating data from the base station controller to the customer premises equipment, the instructions comprising the steps of:
(a) setting a first timeout duration each time the base station controller receives a non-acknowledgement message from a selected customer premises equipment, wherein during the is first timeout duration, the base station controller discards further acknowledgement and non-acknowledgement messages from the selected customer premises equipment, and (b) setting a second timeout duration each time the base station controller receives an invalid message from the selected customer premises equipment, wherein during the second timeout duration, the base station controller discards all further messages received from the selected customer premises equipment.

1 more element

A memory storing information including instructions, the instructions executable by a processor to respond dynamically and adaptively to messages in a point-to-multipoint wireless communication link between a base station controller and plural customer premises equipment, the communication link having an upstream portion for communicating data from the customer premises equipment to the base station controller and a downstream portion for communicating data from the base station controller to the customer premises equipment, the method comprising the steps of:

setting a first timeout duration each time the base station controller receives a non-acknowledgement message from a selected customer premises equipment, wherein during the first timeout duration, the base station controller discards further acknowledgement and non-acknowledgement messages from the selected customer premises equipment;
and
setting a second timeout duration each time the base station controller receives an invalid message from the selected customer premises equipment, wherein during the second timeout duration, the base station controller discards all further messages received from the selected customer premises equipment.

Dependencies are inferred from the claim text.

Automatic retransmission and error recovery for packet oriented point-to-multipoint communication

Life of this patent

Automatic retransmission and error recovery for packet oriented point-to-multipoint communication

Life of this patent

Abstract

Claims18