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Method and system for data transmission during cell switching as well as equipment
Description
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Technical field
The present invention relates to communication technical field, data transmission method, system and equipment when particularly relating to the switching of a kind of sub-district.
Background technology
At TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, the CDMA (Code Division Multiple Access) that time-division is synchronous) in the network, the realization purpose of switching is as UE (UserEquipment, when subscriber equipment) move the leap sub-district, keep UE and do not interrupt with the communication that inserts side; Perhaps, when the signal quality of Serving cell decayed in the certain limit, UE can be transformed into the service quality better cell and go, thereby obtained better service, and guaranteed normal communication.
Concrete, in the TD-SCDMA network, direct-cut operation and baton handover are wherein two kinds of switching modes that network allows.The implementation of this direct-cut operation is that UE needs the original Radio Link of deletion earlier, enables new Radio Link then and carries out communication with the access side.This baton handover is based on TDD (Time DivisionDuplexing, time division duplex) switching mode of system and uplink synchronous technology, in the baton handover process, the signal of same UE all will be accepted in the base station of two sub-districts between the co-frequency cell, and this UE positioned, to determine that the Zone switched positioning result of possibility is to RNC (Radio Network Controller, radio network controller) report, thereby finish switching to target BS, compare with direct-cut operation, baton handover has improved handover success rate, and has shortened switching time.
Prior art is in realizing the process of baton handover, and when determining need be with UE when former sub-district switches to Target cell, RNC sends Radio Link to Target cell and sets up request; This Target cell is set up the relevant resource of request configuration according to this Radio Link, and returns Radio Link to RNC and set up message after configuration is finished; When RNC receives after configuration that Target cell returns finishes message (being that Radio Link is set up message), send the physical channel reconfiguration message to UE by former sub-district; UE with the up Target cell that switches to, returns physical channel to RNC and reshuffles and finish message, and send data to Target cell after receiving this physical channel reconfiguration message.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
When needs switched, the MAC of Target cell (MediaAccess Control, media interviews control) entity had the activationary time of self, and this MAC entity just can be activated when having only this activationary time of arrival; And after UE receives the physical channel reconfiguration message, can send data to Target cell, and this moment if the MAC entity of Target cell is not activated, then Target cell can't receive the data of this UE, thereby causes losing of data.In addition, because losing of data, also can cause the discontinuous of SN (Serial Number, sequence number) number, if RNC finds that the SN number is discontinuous, can ask for the data of losing to UE, and according to prior protocols regulation, UE will retransmit the last item information (be physical channel reshuffle finish message), and is not the packet of losing, RNC will repeat above-mentioned steps, thereby finally cause call drop.
Summary of the invention
Data transmission method, system and equipment when the embodiment of the invention provides a kind of sub-district to switch to reduce losing of data, reduce cutting off rate.
In order to achieve the above object, the data transmission method the when embodiment of the invention has proposed the switching of a kind of sub-district may further comprise the steps:
When network equipment was determined UE to be switched to Target cell, described network equipment sent the physical channel reconfiguration message to described UE, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information;
Described UE activates time delay information to described Target cell transmission data according to the MAC entity of described Target cell.
Described network equipment also comprised before described UE sends the physical channel reconfiguration message:
Described network equipment activates time delay information from the MAC entity that described Target cell obtains described Target cell; Or,
The MAC entity that described network equipment is preserved according to this locality activates the MAC entity activation time delay information that time delay information is obtained described Target cell.
The MAC entity that described network equipment is preserved according to this locality activates time delay information and obtains before the MAC entity activation time delay information of described Target cell, also comprises:
Described network equipment activates time delay information and is kept at this locality for the identical MAC entity of all cell configuration; Or,
Described network equipment is that the different MAC entity of different districts configuration activates time delay information and is kept at this locality according to the hardware configuration information of sub-district.
Described UE comprises to described Target cell transmission data according to the MAC entity activation time delay information of described Target cell:
The MAC entity that described UE obtains the Target cell in the described physical channel reconfiguration message activates time delay;
Time-delay when the MAC entity that arrives described Target cell activates, described UE sends data to described Target cell.
Data transmission system when switch a kind of sub-district comprises:
Network equipment is used for sending the physical channel reconfiguration message to UE when determining UE to be switched to Target cell, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information;
UE is used for activating time delay information to described Target cell transmission data according to the MAC entity of described Target cell.
A kind of network equipment comprises:
Acquisition module, UE switches to Target cell when being used to determine whether UE to be switched to Target cell;
Sending module is used for sending the physical channel reconfiguration message to described UE when described acquisition module is determined UE to be switched to Target cell, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information; And activate time delay information by described UE according to the MAC entity of described Target cell and send data to described Target cell.
Described acquisition module also is used for, and the MAC entity that obtains described Target cell from described Target cell activates time delay information; Or,
The MAC entity of preserving according to this locality activates the MAC entity activation time delay information that time delay information is obtained described Target cell.
Described acquisition module also is used for, for the identical MAC entity of all cell configuration activates time delay information and is kept at this locality; Or,
Hardware configuration information according to the sub-district is that the different MAC entity of different districts configuration activates time delay information and is kept at this locality.
A kind of user equipment (UE) comprises:
Receiver module, be used for when network equipment is determined UE to be switched to Target cell, reception is from the physical channel reconfiguration message of described network equipment, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information;
Sending module is used for activating time delay information to described Target cell transmission data according to the MAC entity of described Target cell.
Described sending module specifically is used for, and the MAC entity that obtains the Target cell in the described physical channel reconfiguration message activates time delay; And time-delay when the MAC entity that arrives described Target cell activates, send data to described Target cell.
Compared with prior art, the present invention has the following advantages:
By at network equipment when UE sends the physical channel reconfiguration message, the MAC entity activation time delay information of Target cell is sent to this UE, make this UE when the MAC entity that arrives described Target cell activates, to delay, send data to Target cell, make upstream data can not lose, thereby reduced the cutting off rate in the handoff procedure.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in the present invention or the description of the Prior Art below, apparently, accompanying drawing in describing below only is accompanying drawings more of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Data transmission method flow chart when switch a kind of sub-district that Fig. 1 proposes for the embodiment of the invention;
Data transmission method flow chart when switch the sub-district that Fig. 2 is proposed down for a kind of concrete application scenarios;
Fig. 3 is the structure chart of a kind of network equipment of embodiment of the invention proposition;
Fig. 4 is the structure chart of a kind of subscriber equipment of embodiment of the invention proposition.
Embodiment
As stated in the Background Art, after receiving physical channel reconfiguration message at UE from RNC, send data to Target cell, data loss problem when causing the MAC entity of Target cell not to be activated, data transmission method when proposing the switching of a kind of sub-district in the embodiment of the invention, activate time delay information by in the physical channel reconfiguration message, carrying the MAC entity, activate time delay information by UE according to this MAC entity and send data (being that UE delays the transmission data when waiting for that the MAC entity activates) to Target cell, thereby upstream data can not lost, thereby reduce cutting off rate.
Below in conjunction with the accompanying drawing among the present invention, the technical scheme among the present invention is clearly and completely described, obviously, described only is a part of the present invention, rather than whole.Based on the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other invention that is obtained under the creative work prerequisite.
Data transmission method when switch a kind of sub-district that the embodiment of the invention proposes as shown in Figure 1, may further comprise the steps:
Need to prove that the described network equipment of this step is before described UE sends the physical channel reconfiguration message, the MAC entity that described network equipment also needs to obtain described Target cell activates time delay information.Further, described network equipment can obtain the MAC entity activation time delay information of described Target cell from described Target cell; Perhaps, described network equipment can also activate the MAC entity activation time delay information that time delay information is obtained described Target cell according to the MAC entity that preserve this locality.Certainly; be not limited in the embodiment of the invention activate time delay information by the MAC entity that uses above-mentioned dual mode to obtain Target cell; the mode that all MAC entities that can get access to Target cell activate time delay information all within protection range of the present invention, does not repeat them here.
In each sub-district, store the MAC entity of self and activated time delay information, when network equipment need know that certain sub-district is Target cell, according to the actual needs, this network equipment can obtain the MAC entity activation time delay information of described Target cell from this Target cell;
In addition, the MAC entity of each sub-district activates time delay information and can also is configured and be stored by network equipment, when needs obtained the MAC entity activation time delay information of Target cell, this network equipment can directly activate the MAC entity activation time delay information that time delay information be obtained described Target cell according to the pairing MAC entity in each sub-district.
Concrete, network equipment comprises for each cell configuration MAC entity activates time delay information: described network equipment activates time delay information for the identical MAC entity of all cell configuration; Or described network equipment is that the different MAC entity of different districts configuration activates time delay information according to the hardware configuration information of sub-district.
In this step, described UE comprises to described Target cell transmission data according to the MAC entity activation time delay information of described Target cell: the MAC entity that described UE obtains the Target cell in the described physical channel reconfiguration message activates time delay; Time-delay when the MAC entity that arrives described Target cell activates, described UE sends data to described Target cell.
As seen, in the method provided by the present invention, by at network equipment when UE sends the physical channel reconfiguration message, the MAC entity activation time delay information of Target cell is sent to this UE, make this UE when the MAC entity that arrives described Target cell activates, to delay, send data to Target cell, make upstream data can not lose, thereby reduced the cutting off rate in the handoff procedure.
As shown in Figure 2, for in the embodiment of the invention in conjunction with a kind of concrete application scenarios, the detailed description that data transmission method when the sub-district is switched carries out, should be with under the scene, with the baton handover process in the TD-SCDMA network is that example describes, certainly, the application scenarios that is suitable in the embodiment of the invention is not limited to the baton handover in this TD-SCDMA network, can also be other handoff procedures in the TD-SCDMA network, or the handoff procedure of other system, give unnecessary details no longer in detail in the embodiment of the invention.Data transmission method when wherein, switch above-mentioned sub-district may further comprise the steps:
Concrete, in embodiments of the present invention, UE to adjacent sub-district measure can for UE to adjacent sub-district carry out common frequency measurement, different-frequency measure is carried out in adjacent sub-district to UE or UE carries out inter-system handover measurement etc. to adjacent sub-district.Wherein, in mobile communication system, because mobility or the other reasons of UE, communication system requires UE to switch between neighbor cell, and in order to realize the switching between neighbor cell, UE must perception before switching may become the signal quality of the sub-district of switching target, promptly can measure the signal quality of adjacent cells, and the mode by measurement report surveys RNC with the measurement result system that sends to, and makes the decision-making of switching for system side.And according to the difference of the attribute of former sub-district related in the handoff procedure, purpose sub-district, have with three kinds of different switching types such as frequency, alien frequencies and the switchings of different system, different switching types requires UE to adopt different measurement behaviors, gives unnecessary details no longer in detail in the embodiment of the invention.
Need to prove, for baton handover, in the communication process of UE and base station, UE need measure the pilot signal strength of former cell base station in place and neighbor cell base station, and determines that in advance a threshold value A is as the standard gate limit value that need to judge whether switching; When the pilot signal strength that records current service cell (former sub-district) all is lower than the A value in a duration T, then UE will send measurement report (for example, the measurement report of received signal intensity decreases Event triggered) and give RNC.
In this step, this Target cell does not activate the MAC entity of self, and needs to wait for that the MAC entity activates after the time delay, just can activate the MAC entity of self, thereby can receive the data from UE.Wherein, it is different that the MAC entity of each manufacturer activates time delay, can adjust according to the actual needs, and for example, when MAC entity activation time delay is set to 400ms, this Target cell will activate the MAC entity after 400ms.
Concrete, the MAC entity is positioned at the bottom of data link layer, plays crucial effect in the TD-SCDMA network.Wherein, this MAC entity is the crucial entity in the data transmission procedure, and when having only this MAC entity to be activated, Target cell can receive data.
Concrete, before this step was carried out, the MAC entity that this RNC need obtain the sub-district activated time delay information, and stored this MAC entity and activate time delay information.Wherein, this mode of obtaining MAC entity activation time delay information of sub-district includes but not limited to: (1) RNC activates time delay information for the identical MAC entity of all sub-districts (the pairing sub-district of same type of base station) configuration.For example, for all sub-districts (all may as Target cell), this RNC activates time delay with the MAC entity and all is set to 400ms (this time delay value can be adjusted according to actual needs), when UE sends the physical channel reconfiguration message, the MAC entity activation time delay information of 400ms is added in this physical channel reconfiguration message (this addition manner can no longer describe this interpolation process in detail for directly adding in the field of physical channel reconfiguration message among the present invention).(2) RNC is that the different MAC entity of different districts configuration activates time delay information according to the hardware configuration information of pairing base station, sub-district.For example, for all sub-districts, this RNC is provided with a fiducial value 400ms, when the hardware configuration of the base station of certain sub-district A correspondence is very high, the MAC entity of this sub-district A can be activated the low of time delay information setting, for example, the MAC entity of this sub-district A activates time delay and is set to 360ms; And the hardware configuration of the base station of certain sub-district B correspondence can activate the MAC entity of this sub-district B the higher of time delay information setting when very low, and for example, the MAC entity of this sub-district B activates time delay and is set to 460ms; As can be seen, in the embodiment of the invention, the MAC entity that this RNC can the flexible configuration sub-district activates time delay information.Certainly, in the embodiment of the invention, be not limited to the MAC entity activation time delay information that aforesaid way obtains Target cell, for example, RNC can also directly obtain the MAC entity activation time delay information of this Target cell from Target cell, give unnecessary details no longer in detail in the embodiment of the invention.
Further, after the MAC entity that gets access to the sub-district activated time delay information, this RNC need store this MAC entity and activate time delay information, when needing to use this MAC entity to activate time delay information in the subsequent step, can directly call this MAC entity and activate time delay information.Wherein, the mode that this RNC store M AC entity activates time delay information includes but not limited to store for the mode by form, MAC entity as shown in table 1 activates the storage list of time delay information, when receive in this step set up message from the Radio Link of sub-district 2 (Target cell) after, getting access to corresponding MAC entity activation time delay information from table 1 is 360ms, and promptly RNC can directly add the MAC entity activation time delay information of this 360ms in the physical channel reconfiguration message to.
Table 1
| Cell ID | The MAC entity activates time delay |
| Sub-district 1 | 400ms |
| Sub-district 2 | 360ms |
| Sub-district 3 | 460ms |
Concrete, after the physical channel reconfiguration message that receives from RNC, this UE is known corresponding Target cell, at this moment, can stop the measuring process to adjacent sub-district, no longer needs to send measurement report.Wherein, UE will continue adjacent sub-district is measured before not receiving the physical channel reconfiguration message, and sends measurement report.
In the embodiment of the invention, activate time delay information owing to carried the pairing MAC of Target cell in this physical channel reconfiguration message, this UE need be after MAC activates time delay arrival, the up Target cell that switches to of ability, the time-delay when MAC that promptly arrives Target cell activates sends data to Target cell.For example, when the MAC activation time delay of Target cell is 360ms, UE will wait for 360ms after receiving the physical channel reconfiguration message, send data to Target cell then.Need to prove, consider the propagation delay time of physical channel reconfiguration message etc., this UE can send the time of data in advance to Target cell.For example, after receiving the physical channel reconfiguration message, will wait for 358ms, send data to Target cell then; Repeat no more in this process embodiment of the invention.
Wherein, the inventive method can be adjusted each sequence of steps according to actual needs.
As seen, the method that the application of the invention provided, for the baton handover process, because UE is issued the up time that switches to Target cell by network side, UE can not send data to Target cell before the un-activation of MAC entity, therefore the UE upstream data can not lost, and has effectively avoided the call drop that causes because of baton handover.And network equipment can dispose different MAC entity according to different districts and activate time delay, thereby improved the up flexibility that switches to Target cell of UE.
Data transmission system when the embodiment of the invention has also proposed the switching of a kind of sub-district comprises:
Network equipment is used for sending the physical channel reconfiguration message to UE when determining UE to be switched to Target cell, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information.
Wherein, this network equipment also is used for: the MAC entity that obtains described Target cell activates time delay information.Promptly obtain the MAC entity activation time delay information of described Target cell from described Target cell; Or the MAC entity of preserving according to this locality activates the MAC entity activation time delay information that time delay information is obtained described Target cell.
Further, this network equipment specifically is used for: for the identical MAC entity of all cell configuration activates time delay information and is kept at this locality; Or,
Hardware configuration information according to the sub-district is that the different MAC entity of different districts configuration activates time delay information and is kept at this locality.
UE is used for activating time delay information to described Target cell transmission data according to the MAC entity of described Target cell.
Concrete, this UE also is used for: the MAC entity that obtains the Target cell of described physical channel reconfiguration message activates time delay; And time-delay when the MAC entity that arrives described Target cell activates, send data to described Target cell.
A kind of network equipment that the embodiment of the invention also proposes as shown in Figure 3, comprising:
Wherein, described acquisition module 31 also is used for, and the MAC entity that obtains described Target cell from described Target cell activates time delay information; Or,
The MAC entity of preserving according to this locality activates the MAC entity activation time delay information that time delay information is obtained described Target cell.
Further, described acquisition module 31 also is used for, for the identical MAC entity of all cell configuration activates time delay information and is kept at this locality; Or,
Hardware configuration information according to the sub-district is that the different MAC entity of different districts configuration activates time delay information and is kept at this locality.
Sending module 32 is used for sending the physical channel reconfiguration message to described UE when described acquisition module 31 is determined UE to be switched to Target cell, and the MAC entity that carries described Target cell in the described physical channel reconfiguration message activates time delay information; And activate time delay information by described UE according to the MAC entity of described Target cell and send data to described Target cell.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
A kind of user equipment (UE) that the embodiment of the invention also proposes as shown in Figure 4, comprising:
Sending module 42 is used for activating time delay information to described Target cell transmission data according to the MAC entity of described Target cell.
Wherein, described sending module 42 specifically is used for, and the MAC entity that obtains the Target cell in the described physical channel reconfiguration message activates time delay; And time-delay when the MAC entity that arrives described Target cell activates, send data to described Target cell.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
As seen, system that the application of the invention provides and device, by at network equipment when UE sends the physical channel reconfiguration message, the MAC entity activation time delay information of Target cell is sent to this UE, make this UE when the MAC entity that arrives described Target cell activates, to delay, send data to Target cell, make upstream data can not lose, thereby reduced the cutting off rate in the handoff procedure.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are with so that a computer equipment (can be personal computer, server, perhaps network equipment etc.) is carried out method of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (10)
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Claims (10)
Hide Dependent
translated from Chinese