Broadcast channel based estimation of frequency offset

• US 10,009,797 B2
• Filed: 01/26/2016
• Issued: 06/26/2018
• Est. Priority Date: 09/25/2015
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Mobile Communications Incorporated (Sony Group Corp.)
• Inventors: Zander, Olof, Priyanto, Basuki, Beale, Martin, Wong, Shin Horng
• Primary Examiner(s): Khan, Suhail
• Application Number:
  US15/007,135
• Publication Number:
  US 20170094562A1
• Time in Patent Office: 882 Days
• Field of Search: None
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2673 characterised by synchronisation parameters
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A radio device applies a carrier frequency for transmission of data between the radio device and a base station of a cellular network. Further, the radio device configures a measurement time interval in which the radio device temporarily switches from the transmission of data to receiving at least one broadcast signal conveying system information from the base station. Based on the received at least one broadcast signal, the radio device estimates an offset of the carrier frequency as applied by the radio device to a frequency of a carrier signal as received from the base station.

Claims

1. A method of controlling radio transmission in a cellular network, the method comprising:

a radio device applying a carrier frequency for transmission of data between the radio device and a base station of the cellular network, wherein the carrier frequency changes according to a frequency hopping pattern;

the radio device configuring a measurement time interval in which the radio device temporarily switches from said transmission of data to receiving at least one broadcast signal conveying system information from the base station, wherein the measurement time interval is configured to occur at least when the frequency hopping pattern indicates an operating frequency band for the carrier frequency matches a frequency band utilized to transmit the at least one broadcast signal; and

based on the received at least one broadcast signal, the radio device estimating a frequency offset between the carrier frequency as applied by the radio device and a frequency of a carrier signal as received from the base station.

2. The method according to claim 1, comprising:

the radio device receiving configuration information defining the measurement time interval from the base station.

3. The method according to claim 2, comprising:

the radio device requesting the configuration information from the base station.

4. The method according to claim 1,

wherein configuration information defining the measurement time interval is preconfigured in the radio device.

5. The method according to claim 1,

wherein said transmission of data is performed in a first frequency band and said receiving of the broadcast signal is performed in a second frequency band which is different from the first frequency band.

6. The method according to claim 1,

wherein the at least one broadcast signal comprises a Physical Broadcast Channel of the LTE radio technology.

7. The method according to claim 1,

wherein the at least one broadcast signal comprises a Primary Synchronization Signal and/or Secondary Synchronization Signal of the LTE radio technology.

8. A method of controlling radio transmission in a cellular network, the method comprising:

a base station of the cellular network determining a carrier signal for transmission of data between at least one radio device and the base station, wherein the carrier frequency is changed according to a frequency hopping pattern; and

the base station configuring a measurement time interval in which the radio device temporarily switches from said transmission of data to receiving at least one broadcast signal conveying system information from the base station, wherein the measurement time interval occurs while, according to the frequency hopping pattern, an operating frequency band around the carrier frequency utilized in the transmission of data matches a frequency band for transmitting the at least one broadcast signal.

9. The method according to claim 8, comprising:

the base station sending configuration information defining the measurement time interval to the at least one radio device.

10. The method according to claim 9, comprising:

the base station sending the configuration information in response to a request from the radio device.

11. The method according to claim 8,

wherein said transmission of data is performed in a first frequency band and said receiving of the broadcast signal is performed in a second frequency band which is different from the first frequency band.

12. The method according to claim 8,

wherein the carrier frequency is changed according to a frequency hopping pattern;

and

wherein the measurement time interval occurs while, according to the frequency hopping pattern, an operating frequency band around the carrier frequency utilized in the transmission of data matches a frequency band for transmitting the at least one broadcast signal.

13. The method according to claim 8,

wherein the at least one broadcast signal comprises a Physical Broadcast Channel of the LTE radio technology.

14. The method according to claim 8,

wherein the at least one broadcast signal comprises a Primary Synchronization Signal and/or Secondary Synchronization Signal of the LTE radio technology.

15. A radio device, comprising:

a radio interface for connecting to a cellular network; and

one or more processors configured to;

apply a carrier frequency for transmission of data between the radio device and a base station of the cellular network, wherein the carrier frequency changes according to a frequency hopping pattern;

configure a measurement time interval in which the radio device temporarily switches from said transmission of data to receiving at least one broadcast signal conveying system information from the base station, wherein the measurement time interval is configured to occur at least when the frequency hopping pattern indicates an operating frequency band for the carrier frequency matches a frequency band utilized to transmit the at least one broadcast signal; and

based on the received at least one broadcast signal, estimate a frequency offset between the carrier frequency as applied by the radio device and a frequency of a carrier signal as received from the base station.

16. A cellular system comprising:

the radio device according to claim 15; and

the base station, comprising;

a radio interface to the radio device; and

one or more processors configured to;

determine a carrier signal for transmission of data between the radio device and the base station; and

configure a measurement time interval in which the radio device temporarily switches from said transmission of data to receiving at least one broadcast signal conveying system information from the base station, wherein the received at least one broadcast signal is utilized by the radio device for estimating a frequency offset between the carrier frequency as applied by the radio device and a frequency of the carrier signal as received from the base station.

17. A base station for a cellular network, the base station comprising:

a radio interface to at least one radio device; and

one or more processors configured to;

determine a carrier signal for transmission of data between the at least one radio device and the base station, wherein the carrier frequency is changed according to a frequency hopping pattern; and

configure a measurement time interval in which the radio device temporarily switches from said transmission of data to receiving at least one broadcast signal conveying system information from the base station, wherein the measurement time interval occurs while, according to the frequency hopping pattern, an operating frequency band around the carrier frequency utilized in the transmission of data matches a frequency band for transmitting the at least one broadcast signal.