METHODS FOR OPERATING A NETWORK INFRASTRUCTURE-SIDE NETWORK UNIT, NETWORK INFRASTRUCTURE-SIDE NETWORK UNITS, METHOD FOR OPERATING A ROADSIDE NETWORK UNIT, ROADSIDE NETWORK UNIT

• US 20200137539A1
• Filed: 06/11/2018
• Published: 04/30/2020
• Est. Priority Date: 07/18/2017
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Brahmi, Nadia
• Granted Patent: US 11,129,001 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A method for operating a network infrastructure-side network unit of a cell-based wireless communication network is provided. The method includes ascertaining a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit; sending the first scheduling grant message to the roadside network unit on a downlink channel; receiving from the roadside network unit on the uplink channel an indication that the assigned sidelink resource of the first sidelink channel is occupied; ascertaining a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the roadside network unit; and sending the second scheduling grant message to the roadside network unit on the downlink channel.

Claims

1-11. -11. (canceled)

12. A method for operating a network infrastructure-side network unit of a cell-based wireless communications network, the method comprising the following steps:

receiving a scheduling request message for a first sidelink channel in an unlicensed frequency range from a roadside network unit on an uplink channel;

ascertaining a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

sending the first scheduling grant message to the roadside network unit on a downlink channel;

receiving, from the roadside network unit on the uplink channel, an indication that the assigned sidelink resource of the first sidelink channel is occupied;

ascertaining a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the roadside network unit; and

sending the second scheduling grant message to the roadside network unit on the downlink channel.

13. The method as recited in claim 12, further comprising the following step:

reserving sidelink resources on the second sidelink channel in the licensed frequency range.

14. The method as recited in claim 12, further comprising the following steps:

ascertaining a likelihood of a collision on the first sidelink channel in the unlicensed frequency range; and

reserving the sidelink resources on the second sidelink channel in the licensed frequency range as a function of the likelihood of a collision.

15. A network infrastructure-side network unit of a cell-based wireless communications network, comprising:

an antenna and a transceiver that are configured to receive a scheduling request message for a first sidelink channel in an unlicensed frequency range from a roadside network unit on an uplink channel; and

a processor that is configured to ascertain a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

wherein the antenna and the transceiver are configured to send the first scheduling grant message to the roadside network unit on a downlink channel, and to receive from the roadside network unit on the uplink channel an indication that the assigned sidelink resource of the first sidelink channel is occupied;

wherein the processor is configured to ascertain a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the roadside network unit; and

wherein the antenna and the transceiver are configured to send the second scheduling grant message to the roadside network unit on the downlink channel.

16. A method for operating a roadside network unit of a cell-based wireless communications network, the method comprising the following steps:

ascertaining a message for sending to a further roadside network unit;

sending a scheduling request message for a first sidelink channel in an unlicensed frequency range to a network infrastructure-side network unit on an uplink channel;

receiving a first scheduling grant message from the network infrastructure-side network unit on a downlink channel, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

ascertaining that the assigned sidelink resource of the first sidelink channel is occupied;

sending to the network infrastructure-side network unit on the uplink channel an indication that the assigned sidelink resource of the first sidelink channel is occupied;

receiving a second scheduling grant message from the network infrastructure-side network unit on the downlink channel, the second scheduling grant message including an assignment of at least one sidelink resource of the second sidelink channel to the roadside network unit; and

sending the message to the further roadside network unit on the second sidelink channel.

17. A method for operating a cell-based wireless communications network, comprising the following steps:

receiving, by a network infrastructure-side network unit of the cell-based wireless communications network, a scheduling request message for a first sidelink channel in an unlicensed frequency range from a roadside network unit on an uplink channel;

ascertaining, by the network infrastructure-side network unit, a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

sending, by the network infrastructure-side network unit, the first scheduling grant message to the roadside network unit on a downlink channel;

receiving, from the roadside network unit on the uplink channel, an indication that the assigned sidelink resource of the first sidelink channel is occupied;

ascertaining, by the network infrastructure-side network unit, a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the roadside network unit;

sending, by the network infrastructure-side network unit;

the second scheduling grant message to the roadside network unit on the downlink channel;

ascertaining, by a roadside network unit of the cell-based wireless communications network, a message for sending to a further roadside network unit;

sending, by the roadside network unit, the scheduling request message for the first sidelink channel in the unlicensed frequency range to the network infrastructure-side network unit on the uplink channel;

receiving, by the roadside network unit, the first scheduling grant message from the network infrastructure-side network unit on the downlink channel, the first scheduling grant message including the assignment of the at least one sidelink resource of the first sidelink channel to the roadside network unit;

ascertaining, by the roadside network unit, that the assigned sidelink resource of the first sidelink channel is occupied;

sending, by the roadside network unit, to the network infrastructure-side network unit on the uplink channel the indication that the assigned sidelink resource of the first sidelink channel is occupied;

receiving, by the roadside network unit, the second scheduling grant message from the network infrastructure-side network unit on the downlink channel, the second scheduling grant message including the assignment of the at least one sidelink resource of the second sidelink channel to the roadside network unit; and

sending, by the roadside network unit, the message to the further roadside network unit on the second sidelink channel.

18. A roadside network unit of a cell-based wireless communications network, comprising:

a processor that is configured to ascertain a message for sending to a further roadside network unit;

an antenna and a transceiver that are configured to send a scheduling request message for a first sidelink channel in an unlicensed frequency range to a network infrastructure-side network unit on an uplink channel, and to receive a first scheduling grant message from the network infrastructure-side network unit on a downlink channel, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

wherein the transceiver and/or the processor is configured to ascertain that the assigned sidelink resource of the first sidelink channel is occupied;

wherein the antenna and the transceiver are configured to send to the network infrastructure-side network unit on the uplink channel an indication that the assigned sidelink resource of the first sidelink channel is occupied, and to receive a second scheduling grant message from the network infrastructure-side network unit on the downlink channel, the second scheduling grant message sending an assignment of at least one sidelink resource of the second sidelink channel to the roadside network unit, and sending the message to the further roadside network unit on the second sidelink channel.

19. A motor vehicle that includes the roadside network unit of a cell-based wireless communications network, the roadside network unit comprising:

a processor that is configured to ascertain a message for sending to a further roadside network unit;

an antenna and a transceiver that are configured to send a scheduling request message for a first sidelink channel in an unlicensed frequency range to a network infrastructure-side network unit on an uplink channel, and to receive a first scheduling grant message from the network infrastructure-side network unit on a downlink channel, the first scheduling grant message including an assignment of at least one sidelink resource of the first sidelink channel to the roadside network unit;

wherein the transceiver and/or the processor is configured to ascertain that the assigned sidelink resource of the first sidelink channel is occupied;

wherein the antenna and the transceiver are configured to send to the network infrastructure-side network unit on the uplink channel an indication that the assigned sidelink resource of the first sidelink channel is occupied, and to receive a second scheduling grant message from the network infrastructure-side network unit on the downlink channel, the second scheduling grant message sending an assignment of at least one sidelink resource of the second sidelink channel to the roadside network unit, and sending the message to the further roadside network unit on the second sidelink channel.

20. A method for operating a network infrastructure-side network unit of a cell-based wireless communications network, the method comprising the following steps:

ascertaining a first group of roadside network units within a cell of the network infrastructure-side network unit;

ascertaining a second group of roadside network units within the cell of the network infrastructure-side network unit, the first group and the second group being disjoint;

receiving a first scheduling request message from a first roadside network unit of the first group on an uplink channel;

ascertaining a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of a first sidelink channel in an unlicensed frequency range to the first roadside network unit of the first group;

sending the first scheduling grant message to the first roadside network unit on a downlink channel;

receiving a second scheduling request message from a second roadside network unit of the second group on the uplink channel;

ascertaining a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the second roadside network unit of the second group; and

sending the second scheduling grant message to the second roadside network unit on a downlink channel.

21. The method as recited in claim 20, further comprising the following steps:

ascertaining a likelihood of a collision on the first sidelink channel in the unlicensed frequency range;

ascertaining the first group of roadside network units within a cell of the network infrastructure-side network unit as a function of the ascertained likelihood of a collision;

ascertaining the second group of roadside network units within a cell of the network infrastructure-side network unit as a function of the ascertained likelihood of a collision.

22. A network infrastructure-side network unit of a cell-based wireless communications network, comprising:

a processor that is configured to ascertain a first group of roadside network units within a cell of the network infrastructure-side network unit, and to ascertain a second group of roadside network units within the cell of the network infrastructure-side network unit, the first group and the second group (Gr1, Gr2) being disjoint; and

an antenna and a transceiver that are configured to receive a first scheduling request message from a first roadside network unit of the first group on an uplink channel;

wherein the processor is configured to ascertain a first scheduling grant message, the first scheduling grant message including an assignment of at least one sidelink resource of a first sidelink channel in an unlicensed frequency range to the first roadside network unit of the first group;

wherein the antenna and the transceiver are configured to send the first scheduling grant message to the first roadside network unit on a downlink channel, and to receive a second scheduling request message from a second roadside network unit of the second group on the uplink channel;

wherein the processor is configured to ascertain a second scheduling grant message, the second scheduling grant message including an assignment of at least one sidelink resource of a second sidelink channel in a licensed frequency range to the second roadside network unit of the second group; and

the antenna and the transceiver are configured to send the second scheduling grant message to the second roadside network unit on a downlink channel.