Methods and apparatus for flexible beam communications in random access in system with large number of antennas
First Claim
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1. A method for random access by a mobile station in a wireless network, the method comprising:
- receiving, from a base station, a spatial direction of at least one receive beam of the base station and configuration information of at least one transmit beam including a number of repetition of the random access signal, a maximum number of transmit beams that are formed by steering at each radio frequency (RF) chain, and timing information to transmit a random access signal, wherein the timing information includes a duration of each transmit beam or a duration of each transmit beam for one repetition associated with the random access signal to be transmitted to the base station over the at least one transmit beam;
configuring at least one transmit beam for a transmission of the random access signal based on the configuration information and the spatial direction of the at least one receive beam;
wherein the at least one transmit beam is selected in accordance with a beam width and a signal strength of the at least one transmit beam; and
transmitting the random access signal to the base station on the at least one transmit beam that is configured in accordance with the receive beam configuration information and the spatial direction of the at least one receive beam received from the base station.
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Abstract
A mobile station performs a method for random access in a wireless network. The method includes receiving, from a base station, information regarding a configuration of at least one receive beam of the base station to receive a random access signal. The method also includes configuring at least one transmit beam for a transmission of the random access signal based on the configuration information from the base station. The method further includes transmitting the random access signal to the base station on the at least one transmit beam.
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Citations
20 Claims
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1. A method for random access by a mobile station in a wireless network, the method comprising:
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receiving, from a base station, a spatial direction of at least one receive beam of the base station and configuration information of at least one transmit beam including a number of repetition of the random access signal, a maximum number of transmit beams that are formed by steering at each radio frequency (RF) chain, and timing information to transmit a random access signal, wherein the timing information includes a duration of each transmit beam or a duration of each transmit beam for one repetition associated with the random access signal to be transmitted to the base station over the at least one transmit beam; configuring at least one transmit beam for a transmission of the random access signal based on the configuration information and the spatial direction of the at least one receive beam;
wherein the at least one transmit beam is selected in accordance with a beam width and a signal strength of the at least one transmit beam; andtransmitting the random access signal to the base station on the at least one transmit beam that is configured in accordance with the receive beam configuration information and the spatial direction of the at least one receive beam received from the base station. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for use in a mobile station configured for random access in a wireless network, the apparatus comprising:
a processor configured to; receive, from a base station, a spatial direction of at least one receive beam of the base station and configuration information of at least one transmit beam including a number of repetition of the random access signal, a maximum number of transmit beams that are formed by steering at each radio frequency (RF) chain, and timing information to transmit a random access signal, wherein the timing information includes a duration of each transmit beam or a duration of each transmit beam for one repetition associated with the random access signal to be transmitted to the base station over the at least one transmit beam; configure at least one transmit beam for a transmission of the random access signal based on the configuration information and the spatial direction of the at least one receive beam;
wherein the transmit beam is selected in accordance with a beam width and a signal strength of the transmit beam; andtransmit the random access signal to the base station on the at least one transmit beam that is configured in accordance with the receive beam configuration information and the spatial direction of the at least one receive beam received from the base station. - View Dependent Claims (7, 8, 9, 10)
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11. A method for random access by a base station in a wireless network, the method comprising:
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transmitting, to a mobile station, a spatial direction of at least one receive beam of the base station and configuration information of at least one transmit beam including a number of repetition of the random access signal, a maximum number of transmit beams that are formed by steering at each radio frequency (RF) chain, and timing information to receive a random access signal, wherein the timing information includes a duration of each transmit beam or a duration of each transmit beam for one repetition associated with the random access signal to be transmitted to the base station over the at least one transmit beam; and receiving the random access signal from the mobile station on the at least one receive beam that is configured in accordance with the transmit beam configuration information received from the mobile station and the spatial direction of the at least one receive beam transmitted from the base station. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus for use in a base station configured for random access in a wireless network, the apparatus comprising:
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a processor configured to; transmit, to a mobile station, a spatial direction of at least one receive beam of the base station and configuration information of at least one transmit beam including a number of repetition of the random access signal, a maximum number of transmit beams that are formed by steering at each radio frequency (RF) chain, and timing information to receive a random access signal, wherein the timing information includes a duration of each transmit beam or a duration of each transmit beam for one repetition associated with the random access signal to be transmitted to the base station over the at least one transmit beam; and receive the random access signal from the mobile station on the at least one receive beam that is configured in accordance with the transmit beam configuration information received from the mobile station and the spatial direction of the at least one receive beam transmitted from the base station. - View Dependent Claims (17, 18, 19, 20)
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Specification