Communications devices, infrastructure equipment and methods

1. A method of controlling an infrastructure equipment forming part of a wireless communications network, the method comprising:

forming one or more beams which can be used by the infrastructure equipment to transmit data to one or more communications devices via a wireless access interface provided by the wireless communications network, each of the beams having a different angular bias with respect to a location of the infrastructure equipment,

transmitting, using a first of the beams, data to one of the communications devices,

changing, dependent on one or more sets of predetermined conditions being met, a beam width of the first of the beams, wherein the beam width increases relative to each previous beam width as a number of Physical Random Access Channel (PRACH) transmission attempts increases, and

re-transmitting, using the first of the beams having the changed beam width, the data to the one of the communications devices.

2. A method of controlling an infrastructure equipment forming part of a wireless communications network, the method comprising:

forming a plurality of beams which can be used by the infrastructure equipment to transmit data to one or more communications devices via a wireless access interface provided by the wireless communications network, each of the beams being offset from one another,

transmitting, using a first of the beams, data to one of the communications devices, and

re-transmitting using at least one next beam, dependent on one or more sets of predetermined conditions being met, the data to the one of the communications devices, wherein the beam width increases relative to each previous beam width as a number of Physical Random Access Channel (PRACH)transmission attempts increases.

3. An infrastructure equipment forming part of a wireless communications network, the infrastructure equipment, comprising:

transmitter circuitry configured to transmit signals to one or more communications devices via a wireless access interface provided by the wireless communications network,

receiver circuitry configured to receive signals from the one or more communications devices via the wireless access interface, and

controller circuitry configured to control the transmitter circuitry and the receiver circuitry to transmit or to receive the signals representing data, the controller circuitry being configured in combination with the receiver circuitry

to receive a re-transmission of signals from one of the communications devices, the signals having been transmitted by the one of the communications devices on a first beam of one or more beams formed by the one of the communications devices, each of the beams having a different angular bias with respect to a location of the communications device, wherein dependent on one or more sets of predetermined conditions being met, a beam width of the first of the beams is changed by the one of the communications devices, wherein the beam width increases relative to each previous beam width as a number of Physical Random Access Channel (PRACH) transmission attempts increases, wherein the re-transmission received by the infrastructure equipment has been transmitted by the one of the communications devices using the first of the beams having the changed beam width.

4. The infrastructure equipment according to claim 3 , wherein the controller is configured in combination with the transmitter circuitry

to transmit a signalling message to the one of the communications devices, the signalling message comprising an indication of a number of re-transmissions which should be attempted by the one of the communications devices for each beam width of the first of the beams before changing the beam width of the first of the beams.

5. The infrastructure equipment according to claim 3 , wherein the controller is configured in combination with the transmitter circuitry

to transmit a signalling message to the one of the communications devices, the signalling message comprising an indication of a maximum beam width to which the communications device may change the beam width of the first of the beams.

6. The infrastructure equipment according to claim 3 , wherein the controller is configured in combination with the transmitter circuitry

to transmit a signalling message to the one of the communications devices, the signalling message comprising an indication of an amount by which the communications device should increase, when changing the beam width of the first of the beams, to increase a transmission power of the data transmission using the first of the beams.