Method for mobile communication handover and system and base station thereof
A method for mobile communication handover and a system and a base station thereof are disclosed in the embodiments of present invention, wherein the method includes steps: on the basis of first link which only bears DCH service and has already existed, adding a second link bearing DCH and E-DCH services and a third link bearing any service; making softer combining for the DCH service of the first link and the second link; in the case of failing to add the third link, informing radio network controller by carrying the DCH softer combining information and E-DCH service addition information which are not in a same diversity indication choice field in link addition failure message. The embodiment of present invention could enhance the successful ratio of communication handover, and maintain communication continuously.
1. A method for mobile communication handover comprising the following steps:
in addition to a first link for bearing only DCH traffic, adding a second link for bearing DCH and E-DCH traffic and a third link for bearing any traffic;
in the case of failure to add the third link, implementing softer combining of DCH traffic on the first and second links; and
informing a radio network controller of both information of the softer combining of DCH traffic and information of the addition of E-DCH traffic, according to which the radio network controller performs communication control.
2. The method for mobile communication handover according to claim 1 wherein the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are informed to the radio network controller by being not carried in a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message.
3. The method for mobile communication handover according to claim 2 wherein in the case of being not informed to the radio network controller by a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message, the information of the softer combining of DCH traffic is indicated by a third level field CHOICE Diversity Indication containing Combining and the information of the addition of E-DCH traffic is indicated by a third level field E-DCH FDD Information Response subordinate to a same second level field as the third level field CHOICE Diversity Indication.
4. The method for mobile communication handover according to claim 1 wherein the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are informed to the radio network controller by being both carried in a combining field subordinate to a choice diversity indication field of a RADIO LINK ADDITION FAILURE message.
5. The method for mobile communication handover according to claim 4 wherein the information of the softer combining of DCH traffic is carried in the fifth level field CHOICE Diversity Indication, and
the information of the addition of E-DCH traffic is carried in the fifth level field E-DCH FDD Information Response, wherein,
the fifth level fields RL ID and E-DCH FDD Information Response are both subordinate to the fourth level field Combining.
6. The method for mobile communication handover according to claim 2 wherein the information of the addition of E-DCH traffic is informed to the radio network controller in such a manner that the field E-DCH FDD Information Response is null if E-DCH traffic needs to be combined with another radio link, and is filled otherwise.
7. The method for mobile communication handover according to claim 3 wherein the information of the addition of E-DCH traffic is informed to the radio network controller in such a manner that the field E-DCH FDD Information Response is null if E-DCH traffic needs to be combined with another radio link, and is filled otherwise.
8. The method for mobile communication handover according to claim 4 wherein the information of the addition of E-DCH traffic is informed to the radio network controller in such a manner that the field E-DCH FDD Information Response is null if E-DCH traffic needs to be combined with another radio link, and is filled otherwise.
9. A mobile communication system comprising a first base station and a radio network controller, wherein
the first base station has a first link subordinate thereto for bearing only DCH traffic, and is adapted to add a second link for bearing DCH and E-DCH traffic and a third link for bearing any traffic, implement softer combining of DCH traffic on the first and second links in the case of failure to add the third link, and inform the radio network controller of both information of the softer combining of DCH traffic and information of the addition of E-DCH traffic; and
the radio network controller is adapted to perform communication control according to the received information.
10. The mobile communication system according to claim 9 wherein the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are informed to the radio network controller by being not carried in a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message.
11. The mobile communication system according to claim 10 wherein in the case of being not informed to the radio network controller by a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message, the information of the softer combining of DCH traffic is indicated by a third level field CHOICE Diversity Indication containing Combining and the information of the addition of E-DCH traffic is indicated by a third level field E-DCH FDD Information Response subordinate to a same second level field as the third level field CHOICE Diversity Indication.
12. The mobile communication system according to claim 9 wherein the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are informed to the radio network controller by being both carried in a combining field subordinate to a choice diversity indication field of a RADIO LINK ADDITION FAILURE MESSAGE.
13. A mobile communication base station comprising:
a link management unit under the control of a radio network controller, adapted to manage a first link for bearing only DCH traffic and add a second link for bearing DCH and E-DCH traffic and a third link for bearing any traffic;
a softer combining unit, adapted to implement softer combining of DCH traffic on the first and second links in the case of failure to add the third link; and
a handover information generation unit, adapted to inform the radio network controller of both information of the softer combining of DCH traffic and information of the addition of E-DCH traffic.
14. The base station according to claim 13 wherein
the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are informed to the radio network controller by being not carried in a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message; or
the information of the softer combining of DCH traffic and the information of the addition of E-DCH traffic are be informed to the radio network controller by being both carried in a combining field subordinate to a choice diversity indication field of a RADIO LINK ADDITION FAILURE message,
in the case of being not informed to the radio network controller by a same choice diversity indication field of a RADIO LINK ADDITION FAILURE message, the information of the softer combining of DCH traffic is indicated by a third level field CHOICE Diversity Indication containing Combining and the information of the addition of E-DCH traffic is indicated by a third level field E-DCH FDD Information Response subordinate to a same second level field as the third level field CHOICE Diversity Indication.
15. The base station according to claim 13 wherein the information of the softer combining of DCH traffic is carried in the fifth level field CHOICE Diversity Indication, and
the information of the addition of E-DCH traffic is carried in the fifth level field E-DCH FDD Information Response, wherein,
the fifth level fields RL ID and E-DCH FDD Information Response are both subordinate to the fourth level field Combining.