Method access point device and peripheral for providing space diversity in a time division duplex wireless system

An access point device for providing space diversity in a time division duplex system, comprising:

• A) an access point device transceiver, coupled to receive access point device data input;
• B) a checking unit, for transmitting and receiving time division duplex data, the checking unit, coupled to the access point device transceiver, for determining whether to generate a repeat request;
• C) an antenna control unit, coupled to the checking unit, for changing antenna selection based on a predetermined scheme;
• D) an antenna unit, coupled to the antenna control unit and a time division duplex switch, for communicating with a peripheral device;
• wherein the access point device transceiver includes:
• a transmitter, coupled to a data block format logic unit, for transmitting data;
• the data block format logic unit, coupled to receive data from a peripheral device, for arranging data from the peripheral device in blocks;
• a controller, coupled to receive repeat requests, the data block format logic unit and a data block unformat logic unit, for controlling the operation of the transceiver;
• the data block unformat logic unit, coupled to a receiver, for stripping the data and a first CRC from the peripheral device out of the data block;
• the receiver, coupled to a time division duplex switch, for receiving data from the peripheral device;
• the time division duplex switch, coupled to the transmitter and receiver, for directing radio frequency signals to and from the access point device transceiver;
• E) a CRC generation unit coupled to the data block format logic unit, for generating a CRC for the data received from the peripheral device;
• wherein the checking unit includes:
• a CRC.sub.2 generation unit, coupled to the data block unformat logic unit, for generating a second CRC from the data received from the peripheral device;
• and
• a CRC checking unit, coupled to the data block unformat logic unit and the CRC.sub.2 generation unit, for comparing the first CRC and the second CRC and outputting a repeat request when the first CRC is unequal to the second CRC and incrementing an N-event counter of the antenna control unit.

A peripheral device for providing space diversity in a time division duplex system, comprising:

• A) a peripheral device transceiver, coupled to receive device data input, an antenna, for transmitting and receiving time division duplex data, wherein the peripheral device transceiver comprises:
• A1) a transmitter, coupled to a data block format logic unit, for transmitting data;
• A2) the data block format logic unit, coupled to receive data from a peripheral, for arranging data from the peripheral in blocks;
• A3) a controller, coupled to receive repeat requests, the data block format logic unit and a data block unformat logic unit, for controlling the operation of the peripheral device transceiver;
• A4) the data block unformat logic unit, couple to a receiver, organizing a continuous stream of data into blocks having a predetermined number of bits and adding another predetermined number of control bits;
• A5) the receiver, coupled to a time division duplex switch, for receiving data from an access point device;
• A6) the time division duplex switch, coupled to the transmitter and receiver, for directing radio frequency signals to and from the peripheral device transceiver;
• B) an antenna, coupled to the peripheral device transceiver, for communicating with an access point device;
• C) a checking unit, coupled to the peripheral device transceiver, wherein the checking unit comprises:
• a CRC generation unit, coupled to the data block unformat logic unit, for generating a cyclic redundancy code CRC from the data input;
• and
• a CRC checking unit, coupled to the data block unformat logic unit and the CRC generation unit, for comparing the CRC generated by the CRC generation unit with a CRC sent by an access point transceiver for outputting a repeat request when the CRC generated by the CRC generation unit is unequal to the CRC sent by the access point transceiver.

A method for controlling a space diversity switch in a time division duplex system, comprising the steps of:

• A) inputting data to an access point device;
• B) generating a first cyclic redundancy check CRC.sub.1 in the access point device;
• C) transmitting the data and the CRC.sub.1 by the access point device;
• D) receiving, by a peripheral device, the data with the CRC.sub.1 ;
• E) extracting CRC.sub.1 from received data and generating a second cyclic redundancy check CRC.sub.2 from received data;
• F) determining whether CRC.sub.1 and CRC.sub.2 are equal, and where CRC.sub.1 and CRC.sub.2 are equal, transmitting an acknowledgment ACK;
• G) where CRC.sub.1 and CRC.sub.2 are unequal, transmitting a negative acknowledgment NAK;
• H) receiving the ACK/NAK at a receiver of the access point device;
• I) determining, by the access point device, whether one of:
• an ACK and a NAK was received;
• J) where an ACK has been received, failing to generate a repeat request and where a NAK has been received, generating a repeat request by the access point device;
• K) incrementing a counter;
• L) determining whether a number of requests=N, N a predetermined integer and where the number of requests.noteq.N, returning to step C;
• and
• M) where the number of requests=N, resetting the counter, changing an antenna state and returning to step C.