US20050192010A1 — Hard handover method and controller

Claim 1

Independent Claim 45 words

1 . A hard handover method in a communication system, the method comprising: exchanging messages indicating bi-directional traffic channel change between communication system units before hard handover; and changing a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 2

Dependent Claim 45 words

1 . A hard handover method in a communication system, the method comprising: exchanging messages indicating bi-directional traffic channel change between communication system units before hard handover; and changing a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 3

Dependent Claim 52 words

2 . A hard handover method in a communication system, the method comprising: exchanging messages indicating traffic channel change between communication system units before hard handover; changing a downlink traffic channel; detecting a communication system unit on a handover target channel; changing an uplink traffic channel; and completing a hard handover process.

Claim 4

Dependent Claim 52 words

2 . A hard handover method in a communication system, the method comprising: exchanging messages indicating traffic channel change between communication system units before hard handover; changing a downlink traffic channel; detecting a communication system unit on a handover target channel; changing an uplink traffic channel; and completing a hard handover process.

Claim 5

Dependent Claim 59 words

3 . The method of claim 1 , wherein the changing the bi-directional traffic channel step is carried out in at least one of and inter-cell base station controller after a handover command, and an intra-cell assignment command message has been sent to a base station to which a user terminal has a connection before the traffic channel change.

Claim 6

Dependent Claim 64 words

4 . The method of claim 1 , wherein the changing the bi-directional traffic channel step is carried out in a base station controller after the base station controller has received at least one of an inter-cell a handover command acknowledgement and an intra-cell assignment command acknowledgement message from a base station a user terminal has a connection to before the traffic channel change.

Claim 7

Dependent Claim 37 words

5 . The method of claim 2 , wherein the completing the hard handover process step comprises a radio link release request message sent by a Radio Resource Control unit of a Serving Radio Network Controller unit.

Claim 8

Dependent Claim 43 words

6 . The method of claim 2 , wherein the changing the downlink traffic channel step is carried out after sending a physical channel reconfiguration message and the changing the uplink channel step is carried out after receiving a physical channel reconfiguration message.

Claim 9

Dependent Claim 18 words

7 . The method of claim 2 , further comprising: establishing downlink bi-casting to old and new channels.

Claim 10

Dependent Claim 28 words

8 . The method of claim 2 , further comprising: establishing downlink bi-casting on Layer-1 of a radio network controller after a new radio link has been added.

Claim 11

Dependent Claim 44 words

9 . The method of claim 2 , wherein the changing the downlink channel step is carried out after sending a physical channel reconfiguration message and wherein the changing the uplink channel step is carried out after a physical channel reconfiguration message is completed.

Claim 12

Dependent Claim 27 words

10 . The method of claim 1 , wherein, in the changing step, the communication system unit detected on the handover target channel comprises a user terminal.

Claim 13

Dependent Claim 27 words

11 . The method of claim 2 , wherein, in the changing step, the communication system unit detected on the handover target channel comprises a user terminal.

Claim 14

Dependent Claim 48 words

12 . A controller of a communication system, the controller comprising: means for exchanging messages indicating bi-directional traffic channel change between other communication system units before hard handover; and means for changing a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 15

Dependent Claim 48 words

12 . A controller of a communication system, the controller comprising: means for exchanging messages indicating bi-directional traffic channel change between other communication system units before hard handover; and means for changing a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 16

Dependent Claim 94 words

13 . A controller of a communication system, the controller comprising: means for exchanging messages indicating traffic channel change between communication system units before hard handover; means for changing a downlink traffic channel; means for detecting a communication system unit on a handover target channel; means for changing an uplink traffic channel; and means for completing a hard handover process, wherein the means for changing the downlink traffice channel, the means for detecting, the means for changing the uplink traffic channel, and the means for completing are operably connected to the means for exchanging.

Claim 17

Dependent Claim 94 words

13 . A controller of a communication system, the controller comprising: means for exchanging messages indicating traffic channel change between communication system units before hard handover; means for changing a downlink traffic channel; means for detecting a communication system unit on a handover target channel; means for changing an uplink traffic channel; and means for completing a hard handover process, wherein the means for changing the downlink traffice channel, the means for detecting, the means for changing the uplink traffic channel, and the means for completing are operably connected to the means for exchanging.

Claim 18

Dependent Claim 68 words

14 . The controller of claim 12 , further comprising: means for carrying out a bi-directional traffic channel change after at least one of an inter-cell handover command, and an intra-cell assignment command message has been sent to a base station to which a user terminal has a connection before the traffic channel change, wherein the means for carrying out is operably connected to the means for exchanging.

Claim 19

Dependent Claim 76 words

15 . The controller of claim 12 , further comprising: means for carrying out a bi-directional traffic channel change in a base station controller after the controller has received at least one of an inter-cell handover command acknowledgement, and an intra-cell assignment command acknowledgement message from a base station to which a user terminal has a connection before the traffic channel change, wherein the means for carrying out is operably connected to the means for exchanging.

Claim 20

Dependent Claim 37 words

16 . The controller of claim 13 , further comprising: means for completing a hard handover process by a radio link release request message, wherein the means for completing is operably connected to the means for exchanging.

Claim 21

Dependent Claim 69 words

17 . The controller of claim 13 , further comprising: means for carrying out the downlink channel change after sending a physical channel reconfiguration message; and means for carrying out the uplink channel change after receiving a physical channel reconfiguration message, wherein the means for carrying out the downlink channel change and the means for carrying out the uplink channel change are operably connected to the means for exchanging.

Claim 22

Dependent Claim 75 words

18 . The controller of claim 13 , further comprising: means for carrying out the downlink channel change after sending a physical channel reconfiguration message; and means for carrying out the uplink channel change after receiving the first uplink user data frame on a handover target channel, wherein the means for carrying out the downlink channel change and the means for carrying out the uplink channel change are operably connected to the means for exchanging.

Claim 23

Dependent Claim 38 words

19 . The controller of claim 13 , further comprising: means for controlling the timing of a downlink channel change by an activation time procedure, wherein the means for controlling is operably connected to the means for exchanging.

Claim 24

Dependent Claim 72 words

20 . The controller of claim 13 , further comprising: means for establishing downlink bi-casting on Layer-1 of a radio network controller after a new radio link has been added; and means for carrying out an uplink channel change after receiving a physical channel reconfiguration complete message, wherein the means for establishing downlink bi-casting and the means for carrying out the uplink channel change are operably connected to the means for exchanging.

Claim 25

Dependent Claim 78 words

21 . The controller of claim 13 , further comprising: means for establishing downlink bi-casting on Layer-1 of the radio network controller after a new radio link has been added thereto; and means for carrying out an uplink channel change after receiving a first uplink user data frame on a handover target channel, wherein the means for establishing downlink bi-casting and the means for carrying out the uplink channel change are operably connected to the means for exchanging.

Claim 26

Dependent Claim 26 words

22 . The controller of claim 12 , wherein, in the changing step, the communication system unit detected on the handover target comprises a user terminal.

Claim 27

Dependent Claim 40 words

23 . The controller of claim 13 , wherein the means for changing the bi-directional traffic channel before detection of the communication system unit on the handover target channel changes the bi-directional traffic channel for detection of a user terminal.

Claim 28

Dependent Claim 51 words

24 . A controller of a communication system, the controller comprising: a transceiver configured to exchange messages indicating bi-directional traffic channel change between other communication system units before hard handover; a controller configured to change a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 29

Dependent Claim 51 words

24 . A controller of a communication system, the controller comprising: a transceiver configured to exchange messages indicating bi-directional traffic channel change between other communication system units before hard handover; a controller configured to change a bi-directional traffic channel before detection of a communication system unit on a handover target channel.

Claim 30

Dependent Claim 90 words

25 . A controller of a communication system, the controller comprising: a transceiver configured to exchange messages indicating traffic channel change between communication system units before hard handover; a first controller configured to change a downlink traffic channel; a detector configured to detect a communication system unit on a handover target channel; a second controller configured to change an uplink traffic channel; and a processor configured to complete a hard handover process, wherein the first controller, the detector, the second controller, and the processor are operably connected to the transceiver.

Claim 31

Dependent Claim 90 words

25 . A controller of a communication system, the controller comprising: a transceiver configured to exchange messages indicating traffic channel change between communication system units before hard handover; a first controller configured to change a downlink traffic channel; a detector configured to detect a communication system unit on a handover target channel; a second controller configured to change an uplink traffic channel; and a processor configured to complete a hard handover process, wherein the first controller, the detector, the second controller, and the processor are operably connected to the transceiver.

Hard handover method and controller

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