Antenna swapping methods using a time period that is received from a network, and related wireless electronic devices

• US 8,909,308 B2
• Filed: 06/28/2012
• Issued: 12/09/2014
• Est. Priority Date: 06/28/2012
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Mobile Communications AB (Sony Group Corp.)
• Inventors: Ljung, Rickard, Bengtsson, Erik, Bolin, Thomas, Karlsson, Peter, Ying, Zhinong
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US13/535,738
• Publication Number:
  US 20140004802A1
• Time in Patent Office: 894 Days
• Field of Search: 455/575.7, 455/230, 455/352, 455/136, 455/562.1, 455/550.1, 455/134, 343/876
• US Class Current: 455/575.7
• CPC Class Codes: H04B 7/0811 during preamble or gap period
• CPC Class Codes: H04B 7/0874 using subgroups of receive antennas

Abstract

Antenna swapping methods for a wireless electronic device may include refraining from swapping antennas of the wireless electronic device for wireless communication with a network other than during a time period that is received at the wireless electronic device from the network. Related systems and devices are also described.

Claims

1. An antenna swapping method for a wireless electronic device, comprising:

receiving a measurement control message indicating measurement gap timing from a network at the wireless electronic device over a first antenna configuration;

swapping from the first antenna configuration to a second antenna configuration, and measuring a performance characteristic of the second antenna configuration, at the indicated measurement gap timing;

comparing the performance characteristic of the second antenna configuration with a performance characteristic of the first antenna configuration;

transmitting an event signal from the wireless electronic device to the network in response to determining that the performance characteristic of the second antenna configuration exceeds the performance characteristic of the first antenna configuration;

after transmitting the event signal, receiving a swap command from the network at the wireless electronic device indicating a time period for the wireless electronic device to swap from the first antenna configuration to the second antenna configuration; and

swapping from the first antenna configuration to the second antenna configuration, at the indicated time period, and communicating with the network over the second antenna configuration.

2. The method of claim 1, wherein the swapping at the indicated measurement gap timing comprises a swap for antenna evaluation purposes that is more temporary than the swapping at the indicated time period.

3. The method of claim 2, further comprising:

after either swapping from the first antenna configuration to the second antenna configuration at the indicated time period or determining that the performance characteristic of the second antenna configuration does not exceed the performance characteristic of the first antenna configuration, determining whether a new measurement control message indicating new measurement gap timing has been received from the network at the wireless electronic device.

4. The method of claim 3, further comprising:

in response to determining that the new measurement control message has been received, swapping between the first and second antenna configurations, and measuring the performance characteristic of one of the first and second antenna configurations, at the new indicated measurement gap timing.

5. The method of claim 3, further comprising:

in response to determining that the new measurement control message has not been received, swapping between the first and second antenna configurations, and measuring the performance characteristic of one of the first and second antenna configurations, at the measurement gap timing indicated by the previously-received measurement control message.

6. The method of claim 1, wherein the indicated measurement gap timing indicates one or more time slots during which the network will not expect the wireless electronic device to receive and process transmissions from the network.

7. The method of claim 1, wherein comparing the performance characteristics of the first and second antenna configurations, respectively, comprises comparing a signal quality measurement of the first antenna configuration with a signal quality measurement of the second antenna configuration.

8. The method of claim 1, wherein swapping from the first antenna configuration to the second antenna configuration comprises swapping from a first group of antennas to a second group of antennas, and wherein the number of active antennas among all groups of antennas remains constant before and after the swapping.

9. The method of claim 1, further comprising disallowing closed-loop antenna swapping by discontinuing receipt of measurement control messages from the network at the wireless electronic device.

10. A wireless electronic device, comprising:

first and second antennas connected to a multi-band transceiver circuit configured to provide communications for the wireless electronic device; and

a controller configured to;

receive a measurement control message indicating measurement gap timing from a network;

control swapping from the first antenna to the second antenna by connecting the second antenna to a transmission chain of the wireless electronic device and disconnecting the first antenna from the transmission chain, and measure a performance characteristic of the second antenna, at the indicated measurement gap timing;

compare the performance characteristic of the second antenna with a performance characteristic of the first antenna;

transmit an event signal to the network indicating that the second antenna provides a better antenna configuration than the first antenna, in response to determining that the performance characteristic of the second antenna exceeds the performance characteristic of the first antenna;

after transmitting the event signal, receive a swap command from the network indicating a time period to swap from the first antenna to the second antenna;

control swapping from the first antenna to the second antenna by connecting the second antenna to the transmission chain and disconnecting the first antenna from the transmission chain, at the indicated time period; and

control communication between the second antenna and the network after the indicated time period.

11. The wireless electronic device of claim 10, wherein:

the transmission chain comprises one among a plurality of transmission chains of the wireless electronic device;

the first and second antennas comprise first and second antennas among a plurality of antennas of the wireless electronic device;

the wireless electronic device further comprises a switch that connects the plurality of transmission chains and the plurality of antennas; and

a quantity of the plurality of antennas is greater than a quantity of the plurality of transmission chains.

12. The wireless electronic device of claim 11, wherein the controller is configured to command the switch to switch which ones of the plurality of antennas are connected to ones of the plurality of transmission chains.

13. The wireless electronic device of claim 12, wherein:

the wireless electronic device comprises a non-transitory storage medium that stores an antenna swapping algorithm;

the controller is configured to control input of the performance characteristics of the first and second antennas, respectively, into the antenna swapping algorithm; and

the controller is further configured to control transmission of an output of the antenna swapping algorithm to the network as the event signal, in response to the antenna swapping algorithm determining that the performance characteristic of the second antenna exceeds the performance characteristic of the first antenna.

14. The wireless electronic device of claim 13, wherein:

the controller is further configured to determine whether a new measurement control message indicating new measurement gap timing has been received from the network at the wireless electronic device, after the antenna swapping algorithm either determines that the performance characteristic of the second antenna exceeds the performance characteristic of the first antenna or determines that the performance characteristic of the second antenna does not exceed the performance characteristic of the first antenna; and

the swapping at the indicated measurement gap timing comprises a swap for antenna evaluation purposes that is more temporary than the swapping at the indicated time period.

15. The wireless electronic device of claim 14, wherein the controller is further configured to control swapping between the first and second antennas, and measuring the performance characteristic one of the first and second antennas, at the new indicated measurement gap timing, in response to determining that the new measurement control message has been received.

16. The wireless electronic device of claim 14, wherein the controller is further configured to control swapping between the first and second antennas, and measuring the performance characteristic of one of the first and second antennas, at the measurement gap timing indicated by the previously-received measurement control message, in response to determining that the new measurement control message has not been received.

17. The wireless electronic device of claim 10, wherein the controller is further configured to temporarily reduce transmission output power during the swapping at the indicated time period.

18. The wireless electronic device of claim 10, wherein swapping from the first antenna to the second antenna comprises swapping from a first group of antennas to a second group of antennas.