Physically separated channels for narrowband, low complexity receivers

A transmitter,

• wherein the transmitter is configured to transmit a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes,
• wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and
• wherein all of the subframes of the second signal are free of any connecting information so that a receiver listening to the second signal cannot set up a connection with the wireless communication system,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A method, comprising:

• receiving and processing, by a receiver of a wireless communication system, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes, wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and wherein all of the subframes of the second signal are free of any connecting information so that a receiver listening to the second signal cannot set up a connection with the wireless communication system,
• establishing a connection of the receiver with the wireless communication system using the connecting information, and
• after having established the connection with the wireless communication system, operating the receiver in the second frequency band responsive to band information indicating the second frequency band,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A method, comprising:

• transmitting, by a transmitter of a wireless communication system, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes,
• wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and
• wherein all of the subframes of the second signal are free of any connecting information so that a receiver listening to the second signal cannot set up a connection with the wireless communication system,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A method, comprising:

• transmitting, by a transmitter of a wireless communication device, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes, wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and wherein all of the subframes of the second signal are free of any connecting information so that the receiver listening to the second signal cannot set up a connection with the wireless communication system,
• receiving and processing, by a receiver of the wireless communication system, the radio signal,
• establishing a connection of the receiver with the wireless communication system using the connecting information, and
• after having established the connection with the wireless communication system, operating the receiver in the second frequency band responsive to band information indicating the second frequency band,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method of

• receiving and processing, by a receiver of a wireless communication system, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes, wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and wherein all of the subframes of the second signal are free of any connecting information so that a receiver listening to the second signal cannot set up a connection with the wireless communication system,
• establishing a connection of the receiver with the wireless communication system using the connecting information, and
• after having established the connection with the wireless communication system, operating the receiver in the second frequency band responsive to band information indicating the second frequency band,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method of

• transmitting, by a transmitter of a wireless communication system, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes,
• wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and
• wherein all of the subframes of the second signal are free of any connecting information so that a receiver listening to the second signal cannot set up a connection with the wireless communication system,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.

A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method of

• transmitting, by a transmitter of a wireless communication device, a radio signal, the radio signal comprising at least a first frequency band and a second frequency band, the first frequency band comprising a first signal, the second frequency band comprising a second signal, and each of the first signal and the second signal comprising a plurality of frames, each frame comprising a plurality of subframes, wherein one or more of the subframes of the first signal comprises connecting information allowing a receiver to establish a connection with a wireless communication system, and wherein all of the subframes of the second signal are free of any connecting information so that the receiver listening to the second signal cannot set up a connection with the wireless communication system,
• receiving and processing, by a receiver of the wireless communication system, the radio signal,
• establishing a connection of the receiver with the wireless communication system using the connecting information, and
• after having established the connection with the wireless communication system, operating the receiver in the second frequency band responsive to band information indicating the second frequency band,
• wherein the connecting information comprises system information, wherein the system information provides several random access channels, RACHs, usable by the receiver for random access, and
• wherein a plurality of RACHs is mapped to a physical downlink control channel, PDCCH.