Linear beam sweeping in high speed scenarios

Patent metadata

Field	Value
Publication number	US-12574130-B2
Application number	US-202118294873-A
Country	US
Kind code	B2
Filing date	Aug 6, 2021
Priority date	Aug 6, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

There are provided measures for improvement of linear beam sweeping in high speed scenarios. Such measures exemplarily comprise setting a second beam width characteristic of a second beam of a beam sweep, wherein said setting includes calculating said second beam width characteristic based on a first beam width characteristic of a first beam of said beam sweep and a ratio between a first path loss of said first beam between an antenna and a first position at a linear trajectory to be covered by said beam sweep and a second path loss of said second beam between said antenna and a second position at said linear trajectory.

First claim

What is claimed is:

1 . An apparatus comprising:
at least one processor; at least one memory including computer program code; and at least one interface configured for communication with at least another apparatus, wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to perform: setting a second beam width characteristic of a second beam of a beam sweep by calculating the second beam width characteristic based on a first beam width characteristic of a first beam of the beam sweep and a ratio between a first path loss of the first beam between an antenna and a first position at a linear trajectory to be covered by the beam sweep and a second path loss of the second beam between the antenna and a second position at the linear trajectory, wherein the calculating further comprises:
determining a factor limit value as a square of a quotient of a first direct propagation length of the first beam of the beam sweep and a second direct propagation length of the second beam, wherein the first direct propagation length corresponds to the first path loss, and wherein the second direct propagation length corresponds to the second path loss;
selecting a factor based on the factor limit value; and multiplying a first beam width characteristic of the first beam with the factor.

2 . The apparatus according to claim 1 , wherein the first path loss corresponds to the first direct propagation length, in a first antenna boresight direction for the first beam, between the antenna and the first position, and the second path loss corresponds to the second direct propagation length, in a second antenna boresight direction for the second beam, between the antenna and the second position.

3 . The apparatus according to claim 1 , wherein the factor is a product of a beam width azimuth component factor and a beam width elevation component factor.

4 . The apparatus according to claim 1 , wherein
the first direct propagation length of the first beam is longer than the second direct propagation length of the second beam, and the factor limit value is an upper limit value for the factor.

5 . The apparatus according to claim 4 , wherein to calculate the second beam width characteristic, the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
selecting the factor such that a link performance of the second beam is not worse than a link performance of the first beam.

6 . The apparatus according to claim 4 , wherein to calculate the second beam width characteristic, the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
selecting the factor such that a dwelling time corresponding to passing a second trajectory length of a second trajectory portion of the linear trajectory to be covered by the second beam fulfilling the second beam width characteristic with a predetermined velocity is higher than a predetermined time period.

7 . The apparatus according to claim 6 , wherein the predetermined time period is a minimum time period required for predetermined beam management and mobility procedures.

8 . The apparatus according to claim 6 , wherein the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
computing the second trajectory length of the second trajectory portion based on the second beam width characteristic, the second direct propagation length, and at least one of a second azimuth beam pointing angle and a second elevation beam pointing angle, corresponding to a second antenna boresight direction for the second beam, from the antenna to the second position.

9 . The apparatus according to claim 4 , wherein to calculate the second beam width characteristic, the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
selecting the factor such that a second dwelling time corresponding to passing a second trajectory length of a second trajectory portion of linear trajectory to be covered by the second beam fulfilling the second beam width characteristic with a predetermined velocity is not less than a first dwelling time corresponding to passing a first trajectory length of a first trajectory portion of the linear trajectory to be covered by the first beam fulfilling the first beam width characteristic with the predetermined velocity.

10 . The apparatus according to claim 1 , wherein
the first direct propagation length of the first beam is shorter than the second direct propagation length of the second beam, and the factor limit value is a lower limit value for the factor.

11 . The apparatus according to claim 10 , wherein to calculate the second beam width characteristic, the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
selecting the factor such that a link performance of the second beam is not better than a link performance of the first beam.

12 . The apparatus according to claim 1 , wherein to calculate the second beam width characteristic, the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
selecting the factor such that a second trajectory length of a second trajectory portion of the linear trajectory to be covered by the second beam fulfilling the second beam width characteristic is equal to a first trajectory length of a first trajectory portion of the linear trajectory to be covered by the first beam fulfilling the first beam width characteristic.

13 . The apparatus according to claim 12 , wherein the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
computing the first trajectory length of the first trajectory portion based on the first beam width characteristic, the first direct propagation length, and at least one of a first azimuth beam pointing angle and a first elevation beam pointing angle, corresponding to a first antenna boresight direction for the first beam, from the antenna to the first position.

14 . The apparatus according to claim 1 , wherein the at least one processor, with the at least one memory and the computer program code, is further configured to select the second beam width characteristic of the second beam such that a received power of the second beam is above a predetermined threshold.

15 . The apparatus according to claim 1 , wherein the at least one processor, with the at least one memory and the computer program code, is further configured to select the second beam width characteristic of the second beam such that a link loss of the second beam is below a predetermined threshold.

16 . The apparatus according to claim 1 , wherein the at least one processor, with the at least one memory and the computer program code, is further configured to cause the apparatus to perform:
computing a plurality of trajectory lengths of a plurality of trajectory portions of the linear trajectory to be covered by a plurality of beams fulfilling the first beam width characteristic based on the first beam width characteristic, a plurality of direct propagation lengths, in a plurality of antenna boresight directions for the plurality of beams, between the antenna and a

Assignees

• Nokia Solutions & Networks Oy

Inventors

• Lo Anthony
• Baker Matthew

Classifications

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W16/28

  using beam steering · CPC title

• H04B7/088

  using beam selection · CPC title

• H04B17/347 Primary

  Path loss · CPC title