MOBILE COMMUNICATION SYSTEM, AND MOBILE UNIT, BASE STATION UNIT AND METHOD THEREFORE

• US 20090209256A1
• Filed: 05/15/2007
• Published: 08/20/2009
• Est. Priority Date: 05/16/2006
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Tsuboi, Hidekazu, Nakashima, Daiichiro
• Granted Patent: US 8,374,108 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface

Abstract

In mobile communication system having a plurality of mobile traits and a plurality of base station units, the system of the present invention is characterised in that the base station unit has a gap period length setting section for setting the length of the gap period for the mobile unit depending on the type of the radio access technology to be monitored by the mobile unit.

Claims

1. A mobile communication system having a plurality of mobile units and a plurality of base station units,

wherein the base station unit has a gap period setting section for setting the length of a gap period for a mobile unit, depending on the type of the radio access technology to be monitored by the mobile unit.

2. A mobile communication system as claimed in claim 1, wherein the gap period setting section of the base station unit is adapted to set the length of the gap period for the mobile unit, depending on the type of the radio access technology to be monitored and reported by the mobile unit.

3. A mobile communication system as claimed in claim 1, wherein the gap period setting section of the base station unit is adapted to set the lengths of a plurality of the gap periods for the mobile unit, depending on the types of the radio access technologies to be monitored by the mobile unit.

7. A mobile communication system as claimed in claim 3 or 6, wherein the gap period setting section of the base station unit is adapted to set the lengths of the gap periods by resetting, if the base station unit receives from a mobile unit a reception quality indicator, a gap period of a length set at a longer value than the short gap length among the plurality of the simultaneously set gap lengths, and by continuously setting, if the base station unit does not receive within the short gap length from the mobile unit a reception quality indicator, a gap period set at a value longer than the short gap length.

8. A mobile communication system as claimed in claim 1, wherein the mobile unit has a gap period setting section for setting the length of the gap period, depending on the type of radio access technology to be monitored.

10. A mobile communication system as claimed in claim 8 or 9,

wherein the mobile unit has a first mode-decision section for determining, based on the reception quality indicator, a measurement mode for monitoring the adjacent base station unit or an ordinary mode for not monitoring the adjacent base station unit,

wherein the gap period setting section of the mobile unit is adapted to set the length of the gap period on the basis of the decision performed at the first mode-decision section and the reception quality indicator,

wherein the base station unit has a second mode-decision section for determining, based on the reception quality indicator fed back from the mobile unit, whether the mobile unit is in the measurement mode or in the ordinary mode, and

wherein the gap period setting section at the base station unit sets the gap length on the basis of the decision performed at the second mode decision selection.

11. A mobile communication system as claimed in claim 8 or 9,

wherein the mobile unit has a first mode decision section for determining the measurement mode for monitoring an adjacent base station unit or the ordinary mode for not monitoring an adjacent base station unit,

wherein the gap period setting section of the mobile unit is adapted to set the length of the gap period on the basis of the result of the decision performed at the first mode decision section and the reception quality indicator, and

wherein the gap period setting section of the base station unit is adapted to set the length of the gap on the basis of the decision performed at the first mode decision section and the reception quality indicator fed back from the mobile unit.

12. A mobile communication system as claimed in claim 8 or 9,

wherein the mobile unit has a first mode decision section for determining, on the basis of the reception quality indicator, the measurement mode for monitoring an adjacent base station unit or the ordinary mode for not monitoring a adjacent base station unit,

wherein the gap length setting section of the mobile unit is adapted to set, on the basis of the decision performed at the first mode decision section and the reception quality indicator, the length of the gap period, and

wherein the gap length setting section of the base station unit is adapted to set based on the reception quality indicator fed back from the mobile unit, the length of the gap period.

4. A mobile communication system having a plurality of mobile units and a plurality of base station units,

wherein the base station unit has a gap period setting section for setting the length of a gap period for a mobile unit depending on the type of combinations of the radio access technology to be monitored by the mobile unit and the frequency utilized for the wireless communication between the mobile units and the base station units.

5. A mobile communication system as claimed in claim 4, wherein the gap period setting section of the base station unit is adapted to set the length of the gap period for the mobile unit, depending on the type of the combination of the radio access technology to be monitored and reported by the mobile unit and the frequency band utilized for the wireless communication.

6. A mobile communication system as claimed in claim 4, wherein the gap period setting section of the base station unit is adapted to simultaneously set the lengths of a plurality of gap periods for the mobile unit depending on the type of the combination of the radio access technology to be monitored by the mobile unit and the frequency band utilized for the wireless communication.

9. A mobile communication system as claimed in claim 4, wherein the mobile unit has a gap period setting section for setting the length of the gap period, depending on the type of the combination of the radio access technology to be monitored and the frequency band utilized for the wireless communication.

13. A mobile unit for performing wireless communication with a base station unit, characterized by having a gap length-setting section for setting the length of the gap period depending on the type of the radio access technology to be monitored.

14. A mobile unit for performing wireless communication with a base station unit, characterized by having a gap period setting section for setting the length of the gap period, depending on the type of combination of the radio access technology to be monitored and the frequency band utilized for the wireless communication.

15. A base station unit for communication with a mobile unit characterized by having a gap period setting section for setting the length of the gap period, depending on the type of radio access technology to be monitored by the mobile unit.

16. A base station unit for communication with the mobile unit, characterized by having a gap period setting section for setting the length of the gap period for the mobile unit, depending on the type of combination of the radio access technology to be monitored by the mobile unit and the frequency band utilized for the wireless communication.

17. A mobile communication method for providing wireless communication between a plurality of mobile units and a plurality of base station units, wherein the base station, unit is adapted to set the length of the gap period for the mobile units, depending on the type of the radio access technology to be monitored by the mobile unit.

18. A mobile communication method for providing mobile wireless communication between a plurality of mobile units and a plurality of base station units, wherein the base station unit is adapted to set the length of the gap period for the mobile unit, depending on the type of combination of the radio access technology to be monitored by the mobile unit and the frequency band utilized for the wireless communication.