User equipment, base stations, and wireless communications systems for ultra-reliable communications

A base station configured to control a wireless communications network cell of a wireless communications network being operated in a Time Division Duplex (TDD) scheme, the TDD scheme comprising a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame,

• wherein the base station is configured to transmit a first number of symbols during the guard period;
• or
• wherein the base station is configured to receive the uplink symbol and to receive a second number of symbols previous to reception of the uplink symbol;
• wherein the base station is configured to
• transmit the downlink symbol in a first frequency band and to transmit the first number of symbols in a second frequency band;
• or
• receive the uplink symbol in the first frequency band and to receive the second number of symbols in the second frequency band;
• or
• wherein the user equipment is a first user equipment;
• wherein the base station is configured to control a second user equipment communicating with the base station so as to receive a third number of symbols during the guard period and to transmit a further uplink symbol and to transmit a fourth number of symbols previous to transmitting the further uplink symbol;
• and wherein the base station is configured to control the first and second user equipment such that at least one of the first number and the second number and at least one of the third number and the fourth number is device dependent for the first and second user equipment.

A wireless communications network comprising:

• a base station configured to control a wireless communications network cell of the wireless communications network being operated in a TDD scheme, the TDD scheme comprising a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame, wherein the base station is configured to transmit a first number of symbols during the guard period;
• or wherein the base station is configured to receive the uplink symbol and to receive a second number of symbols previous to reception of the uplink symbol;
• a first user equipment configured to operate in the wireless communications network, wherein the first user equipment is configured to receive a first number of symbols during the guard period;
• or wherein the first user equipment is configured to transmit the uplink symbol and to transmit a second number of symbols previous to transmitting the uplink symbol;
• and
• a second user equipment configured to operate in the wireless communications network, wherein the second user equipment is configured to receive a third number of symbols during the guard period;
• or wherein the second user equipment is configured to transmit the uplink symbol and to transmit a fourth number of symbols previous to transmitting the uplink symbol;
• wherein the base station is a first base station and configured to operate a first cell of the wireless communications network;
• wherein the wireless communications network comprises a second base station configured to operate a second cell of the wireless communications network, the second cell and the first cell overlapping in an overlap area;
• wherein the first base station and the second base station are configured to exchange information relating to the first number of symbols or to the second number of symbols used by the first base station;
• and
• wherein the first base station is configured to adapt the first number of symbols and the second number of symbols based on information received from the second base station.

A method for operating a user equipment in a wireless communications network being operated in a Time Division Duplex (TDD) scheme such that the TDD scheme comprises a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame, the method comprising:

• receiving a first number of symbols during the guard period;
• and such that the downlink symbol is received in a first frequency band previous to receiving the first number of symbols and the first number of symbols is received in a second frequency band;
• or
• transmitting the uplink symbol and transmitting a second number of symbols previous to transmitting the uplink symbol;
• such that the uplink symbol is transmitted in the first frequency band and the second number of symbols is transmitted in a second frequency band.

A method for operating a base station to control a wireless communications network cell of a wireless communications network being operated in a Time Division Duplex (TDD) scheme such that the TDD scheme comprises a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame, the method comprising:

• transmitting a first number of symbols during the guard period;
• or
• receiving the uplink symbol and receiving a second number of symbols previous to reception of the uplink symbol;
• such that the downlink symbol is transmitted in a first frequency band and the first number of symbols is transmitted in a second frequency band;
• or such that the uplink symbol is received in the first frequency band and the second number of symbols is received in the second frequency band;
• wherein the user equipment is a first user equipment;
• and the base station controls a second user equipment communicating with the base station so as to receive a third number of symbols during the guard period or to transmit a further uplink symbol and to transmit a fourth number of symbols previous to transmitting the further uplink symbol;
• and such that the base station controls the first and second user equipment such that at least one of the first number and the second number and at least one of the third number and the fourth number is device dependent for the first and second user equipment.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for operating a user equipment in a wireless communications network being operated in a Time Division Duplex (TDD) scheme such that the TDD scheme comprises a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame, the method comprising:

• receiving a first number of symbols during the guard period;
• such that the downlink symbol is received in a first frequency band previous to receiving the first number of symbols and the first number of symbols is received in a second frequency band;
• or
• transmitting the uplink symbol and transmitting a second number of symbols previous to transmitting the uplink symbol;
• such that the uplink symbol is transmitted in the first frequency band and the second number of symbols is transmitted in a second frequency band,
• when said computer program is run by a computer.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for operating a base station to control a wireless communications network cell of a wireless communications network being operated in a Time Division Duplex (TDD) scheme such that the TDD scheme comprises a plurality of TDD-frames, each TDD-frame comprising a guard period arranged between a downlink symbol and an uplink symbol of the TDD-frame, the method comprising:

• transmitting a first number of symbols during the guard period;
• or
• receiving the uplink symbol and receiving a second number of symbols previous to reception of the uplink symbol;
• such that the downlink symbol is transmitted in a first frequency band and the first number of symbols is transmitted in a second frequency band;
• or such that the uplink symbol is received in the first frequency band and the second number of symbols is received in the second frequency band, or
• wherein the user equipment is a first user equipment;
• and the base station controls a second user equipment communicating with the base station so as to receive a third number of symbols during the guard period or to transmit a further uplink symbol and to transmit a fourth number of symbols previous to transmitting the further uplink symbol;
• and such that the base station controls the first and second user equipment such that at least one of the first number and the second number and at least one of the third number and the fourth number is device dependent for the first and second user equipment,
• when said computer program is run by a computer.