CN107872852A - A kind of method that control base station sends downlink data in handoff procedure - Google Patents
A kind of method that control base station sends downlink data in handoff procedure Download PDFInfo
- Publication number
- CN107872852A CN107872852A CN201610862865.8A CN201610862865A CN107872852A CN 107872852 A CN107872852 A CN 107872852A CN 201610862865 A CN201610862865 A CN 201610862865A CN 107872852 A CN107872852 A CN 107872852A
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- cell
- rach
- former cell
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes a kind of method that control base station sends downlink data in handoff procedure, including：When supporting the user equipment (UE) of RACH less and make before break combination abilities to switch, the network side issues the UE and sends the relevant parameter of upstream data in Target cell, and indicates using RACH less and make before break combination techniques to the UE；Relevant parameters and the instruction of the UE according to the transmission upstream data, it is determined that leaving the temporal information of former cell, and are sent to former cell；Former cell stops the transmission of downlink data and control information at the time of the UE leaves the temporal information meaning of former cell, starts to carry out data forwarding to Target cell.The present invention can make former cell stop sending downlink data at correct time point, avoid loss of data of eating dishes without rice or wine, and can at utmost reduces service disconnection time delay of eating dishes without rice or wine.
Description
Technical field
The present invention relates to the method that control base station in mobile communication, more particularly to a kind of handoff procedure sends downlink data.
Background technology
With the development of wireless mobile telecommunication technology, people propose higher and higher to high-speed, low latency, low cost
It is required that.LTE (Long Term Evolution) project just generates in this context, pursue higher peak rate and
Shorter propagation delay time.
There are many service features to be influenceed by Packet Delay at present, such as：Game, in real time application such as VoLTE/OTT
VoIP, visual telephone/meeting etc..Some following business are also to delay requirement harshness, such as remote control/driving car
, machine communication and critical communication etc..So prolong to ensure LTE evolution and competitiveness, it is necessary to study and reduce packet
Slow method.
In the prior art, the handover delay of handoff procedure is about 40~50ms.The time delay of each step is about as follows：
If former cell, it is synchronous between Target cell and UE, then can skips RACH processes in handoff procedure, UE,
Directly arrive Target cell and monitor PDCCH.This is meaningful to reducing the service disconnection time delay in handoff procedure.In addition switched
Cheng Zhong, after former cell has sent switching command, still keep entering row data communication between UE, until between UE and Target cell
Data communication is proceeded by, this can also reduce the service disconnection time delay of handoff procedure.Problem is that former cell has sent switching
Continue to send downlink data to UE after order, but be not aware that UE specifically leaves the time of former cell, thus former cell when
Stop data and be sent to UE, the loss for the data that are just unlikely to eat dishes without rice or wine.When reducing service disconnection in handoff procedure on two kinds simultaneously
How the method prolonged, which controls use to be also one, needs to solve the problems, such as.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of method that control base station sends downlink data in handoff procedure, including：
It is described when supporting the user equipment (UE) of RACH-less and make before break combination abilities to switch
Network side issues the UE and sends the relevant parameter of upstream data in Target cell, and indicates to use RACH-less and make
Before break combination techniques give the UE；
Relevant parameters and the instruction of the UE according to the transmission upstream data, it is determined that leaving the time letter of former cell
Breath, and it is sent to former cell；
Former cell stops downlink data and control information at the time of the UE leaves the temporal information meaning of former cell
Send, start to carry out data forwarding to Target cell.
Further, in addition to：The UE report the ability of supporting RACH-less and make before break and
Support the ability of RACH-less and make before break combinations to network side.
Further, the network side issues the UE and sends the relevant parameter of upstream data in Target cell, and indicates
Included using RACH-less and make before break combination techniques to the UE：
Target cell configures the relevant parameter that the UE sends upstream data in Target cell, and in response message is switched
Former cell is notified to use RACH-less and make before break combination techniques for the UE；
The former cell issues switching command to the UE, wherein carry the UE sends upstream data in Target cell
Relevant parameter, and indicate that the UE is combined using RACH-less and make before break in RRC connection reallocation messages
Technology.
Further, the UE sends the temporal information for leaving former cell determined by up MAC CE to former small
Area.
Further, the relevant parameter includes：The UE sends SFN, subframe of upstream data in Target cell
With UL grant information.
Further, the relevant parameter also includes：The cycle of the UL grant.
Further, the UE leaves the temporal information of former cell and included：Leave SFN and the subframe letter of former cell
Breath.
How present invention control UE and network side, which use, reduces service disconnection time delay in handoff procedure, and when the two is combined
Control former cell to send data to UE during use, former cell is stopped sending business datum at correct time point to UE, it is unlikely
Eated dishes without rice or wine data in loss, and can farthest reduces service disconnection time delay of eating dishes without rice or wine.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in the embodiment of the present invention
Technical scheme is clearly and completely described, it is clear that and described embodiment is part of the embodiment of the present invention, rather than entirely
The embodiment in portion；It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can be with
It is mutually combined.Based on the embodiment in the present invention, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
One embodiment of the present of invention proposes a kind of method that control base station sends downlink data in handoff procedure, including：
It is described when supporting the user equipment (UE) of RACH-less and make before break combination abilities to switch
Network side issues the UE and sends the relevant parameter of upstream data in Target cell, and indicates to use RACH-less and make
Before break combination techniques give the UE；
Relevant parameters and the instruction of the UE according to the transmission upstream data, it is determined that leaving the time letter of former cell
Breath, and it is sent to former cell；
Former cell stops downlink data and control information at the time of the UE leaves the temporal information meaning of former cell
Send, start to carry out data forwarding to Target cell.
In one alternate embodiment, in addition to：The UE, which is reported, supports RACH-less and make before break
Ability and support the ability of RACH-less and make before break combination to network side.
In one alternate embodiment, network side issues the relevant parameter that the UE sends upstream data in Target cell,
And indicate to the UE to include using RACH-less and make before break combination techniques：
Target cell configures the relevant parameter that the UE sends upstream data in Target cell, and in response message is switched
Former cell is notified to use RACH-less and make before break combination techniques for the UE；
Former cell issues switching command to the UE, wherein carrying the correlation that the UE sends upstream data in Target cell
Parameter, and indicate that the UE uses RACH-less and make before break combination techniques in RRC connection reallocation messages.
In one alternate embodiment, UE sent by up MAC CE the temporal information for leaving former cell that determines to
Former cell.
In one alternate embodiment, relevant parameter includes：The UE Target cell send upstream data SFN,
Subframe and UL grant information.
In one alternate embodiment, relevant parameter also includes：The cycle of the UL grant.
In one alternate embodiment, UE leaves the temporal information of former cell and included：Leave former cell SFN and
Subframe information.
How present invention control UE and network side, which use, reduces service disconnection time delay in handoff procedure, and when the two is combined
Control former cell to send data to UE during use, former cell is stopped sending business datum at correct time point to UE, it is unlikely
Eated dishes without rice or wine data in loss, and can farthest reduces service disconnection time delay of eating dishes without rice or wine.
Embodiment
First, UE reports UE to support RACH-less and make before when reporting wireless capability to base station side
Break ability and the ability for supporting RACH-less and make before break combinations.
If UE supports the ability of RACH-less and make before break combinations, Target cell is preparing to switch
Can sends the SFN of upstream data that is, in switching command comprising UE using this technology is done in target side during order,
The data such as subframe, UL grant, it is also possible to cycle comprising this UL grant etc..In HO acknowledge message
The technology for notifying former cell to use RACH-less and make before break to combine for target UE.
Former cell issues switching command to UE, and indicates target in RRCConnectionReconfiguration message
UE has used the technology that RACH-less and make before break are combined.Purpose is exactly to tell UE to notify that original is small after leaving
Area.
After UE receives switching command, if it is indicated that having used the skill that RACH-less and make before break are combined
Art, then UE is according to the SFN of the transmission upstream data of configuration, the data such as subframe, UL grant, it is determined that leaving former cell
SFN and subframe information, and former cell is sent in up MAC CE,
Former cell is after the MAC CE are received, and at the time of SFN the and subframe meanings of instruction, stops downlink data
With the transmission of control information, and start give Target cell carry out data forwarding.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program
Upon execution, the step of execution includes above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (7)
1. a kind of method that control base station sends downlink data in handoff procedure, it is characterised in that including：
When supporting the user equipment (UE) of RACH-less and make before break combination abilities to switch, the network
Side issues the UE and sends the relevant parameter of upstream data in Target cell, and indicates to use RACH-less and make before
Break combination techniques give the UE；
Relevant parameters and the instruction of the UE according to the transmission upstream data, it is determined that the temporal information of former cell is left,
And it is sent to former cell；
Former cell stops downlink data and the hair of control information at the time of the UE leaves the temporal information meaning of former cell
Send, start to carry out data forwarding to Target cell.
2. according to the method for claim 1, it is characterised in that also include：
The UE reports the ability for supporting RACH-less and make before break and supports RACH-less and make
The ability of before break combinations is to network side.
3. according to the method for claim 1, it is characterised in that the network side issues the UE in Target cell transmission
The relevant parameter of row data, and indicate to the UE to include using RACH-less and make before break combination techniques：
Target cell configures the UE and sends the relevant parameter of upstream data in Target cell, and is notified in response message is switched
Former cell is that the UE has used RACH-less and make before break combination techniques；
The former cell issues switching command to the UE, wherein carrying the correlation that the UE sends upstream data in Target cell
Parameter, and indicate that the UE uses RACH-less and make before break combination techniques in RRC connection reallocation messages.
4. method according to claim 1, it is characterised in that the UE leaves original by what up MAC CE transmissions determined
The temporal information of cell gives former cell.
5. according to the method described in Claims 1 to 4 any one, it is characterised in that the relevant parameter includes：The UE exists
Target cell sends SFN, subframe and UL grant information of upstream data.
6. according to the method for claim 5, it is characterised in that the relevant parameter also includes：The week of the UL grant
Phase.
7. according to the method for claim 5, it is characterised in that the temporal information that the UE leaves former cell includes：Leave
SFN the and subframe information of former cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862865.8A CN107872852A (en) | 2016-09-28 | 2016-09-28 | A kind of method that control base station sends downlink data in handoff procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862865.8A CN107872852A (en) | 2016-09-28 | 2016-09-28 | A kind of method that control base station sends downlink data in handoff procedure |
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| Publication Number | Publication Date |
|---|---|
| CN107872852A true CN107872852A (en) | 2018-04-03 |
Family
ID=61761753
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610862865.8A Withdrawn CN107872852A (en) | 2016-09-28 | 2016-09-28 | A kind of method that control base station sends downlink data in handoff procedure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020135777A1 (en) * | 2018-12-29 | 2020-07-02 | 中国移动通信有限公司研究院 | Conditional handover processing method and apparatus, related device, and storage medium |
| WO2020172776A1 (en) * | 2019-02-25 | 2020-09-03 | Oppo广东移动通信有限公司 | Data forwarding method, device, and storage medium |
| CN113825186A (en) * | 2020-06-19 | 2021-12-21 | 维沃移动通信有限公司 | Control method and device for leaving network and communication equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020135777A1 (en) * | 2018-12-29 | 2020-07-02 | 中国移动通信有限公司研究院 | Conditional handover processing method and apparatus, related device, and storage medium |
| CN111385850A (en) * | 2018-12-29 | 2020-07-07 | 中国移动通信有限公司研究院 | Processing method and device based on condition switching, related equipment and storage medium |
| CN113038559A (en) * | 2018-12-29 | 2021-06-25 | 中国移动通信有限公司研究院 | Processing method and device based on condition switching, related equipment and storage medium |
| CN111385850B (en) * | 2018-12-29 | 2023-04-07 | 中国移动通信有限公司研究院 | Processing method and device based on condition switching, related equipment and storage medium |
| CN113038559B (en) * | 2018-12-29 | 2023-07-21 | 中国移动通信有限公司研究院 | Processing method and device based on condition switching, related equipment and storage medium |
| WO2020172776A1 (en) * | 2019-02-25 | 2020-09-03 | Oppo广东移动通信有限公司 | Data forwarding method, device, and storage medium |
| CN113825186A (en) * | 2020-06-19 | 2021-12-21 | 维沃移动通信有限公司 | Control method and device for leaving network and communication equipment |
| WO2021254433A1 (en) * | 2020-06-19 | 2021-12-23 | 维沃移动通信有限公司 | Method and apparatus for controlling leaving network, and communication device |
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Application publication date: 20180403 |