CN102076104B - Data packet processing method for semi-persistence scheduling and base station - Google Patents
Data packet processing method for semi-persistence scheduling and base station Download PDFInfo
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Abstract
The invention discloses a data packet processing method for semi-persistence scheduling and a base station. The method comprises the following steps of: determining cache data of a logical channel for the semi-persistence scheduling to be empty, wherein semi-persistence physical downlink shared channel resources exist at a current transmission time interval; accessing a medium to a control protocol data unit to construct the medium in a preset format, wherein the protocol data unit in the preset format is used for ensuring that a terminal can normally conduct decoding processing and hybrid automatic repeat request processing, and discarding the protocol data unit after the hybrid automatic repeat request processing and before subsequent processing; and accessing the constructed medium to the control protocol data unit and transmitting the constructed medium to the terminal through the semi-persistence physical downlink shared channel resources. For a time division duplex-long term evolution system, under the situation that the logical channel for semi-persistence scheduling has no cache data but the physical downlink shared channel resources exist at the current transmission time interval, the invention provides a processing scheme for the base station under the situation.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of data package processing method of semi-continuous scheduling and base station.
Background technology
Use the shared channel propagation delay time to require the business high, that data rate is low (as VoIP (Voice over IP for optimizing, IP-based voice transfer)) efficient the time, the control channel expense in optimized transmission particularly, at TDD-LTE (Time Division Duplex-Long Term Evolution, time division duplex-Long Term Evolution) in system, introduced the mode that a kind of semi-continuous resource is distributed.Be that base station (eNodeB) control channel PDCCH of transmission (physical downlink control channel, Physical Downlink Control Channel) can be the periodic physical resource of terminal distribution.And the base station can also change semi-continuous resource distribution or regain semi-continuous resource by transmitting control channel.
For the TDD-LTE system, the transmission block MAC that sends on descending semi-continuous resource (Medium Access Control, the media access control) PDU (Protocol Data Unit, protocol Data Unit) still use the MAC PDU form of DL-SCH (Down-link Shared Channel, DSCH Downlink Shared Channel).The format description of MAC PDU and field detailed meanings can be referring to 3GPP TS 36.321-930: " Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification " 6.1 joints and 6.2 save.
In the TDD-LTE system, use the logic channel of generic downlink dynamic dispatching, the TTI of this logical channel data (Transmission Time Interval not in the eNodeB buffer memory, Transmission Time Interval), to can not dispatch this logic channel and be this logical channel assignment PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) resource, there is no need this moment also can not send PDCCH and MAC PDU for this logic channel, owing to there is no PDCCH, terminal can not receive the upper data of PDSCH yet.
In the TDD-LTE system, logic channel for descending semi-continuous scheduling, its semi-continuous PDSCH resource is the periodic resources of distributing by the PDCCH that once sends, terminal can be according to relevant informations such as the resource of PDCCH indicating and transmission blocks, and the pre-configured cycle of high-level signaling, periodically specifying detection and reception MAC PDU data on the PDSCH resource.
Because the PDSCH resource of semi-continuous scheduling is the periodic resources of allocating in advance, mate fully with the interface-free resources of allocating in advance and the business datum that is carried on descending semi-continuous resource arrives the rule of base station (eNodeB) and data volume is very difficult, therefore just may appear at the TTI that has half-persistence scheduling resources, base station (eNodeB) semi-continuous scheduling logic channel is without data cached situation about sending out.
And the deficiencies in the prior art are: without data cached, but in the situation that there is the PDSCH resource in current TTI, how this processes also not have scheme to solve base station (eNodeB) side at descending semi-continuous scheduling logic channel.
Summary of the invention
Technical problem solved by the invention be to provide a kind of at descending semi-continuous scheduling logic channel without data cached, but have under the PDSCH resource situation a kind of data package processing method of semi-continuous scheduling and base station in current TTI.
A kind of data package processing method of semi-continuous scheduling is provided in the embodiment of the present invention, has comprised the steps:
The data cached of logic channel of determining semi-continuous scheduling is sky, and has semi-continuous PDSCH resource in current TTI;
The form that MAC PDU is configured to preset, the MAC PDU of form that should be default can carry out normal decoding and mixed automatic repeat request HARQ processes according to this MAC PDU in order to guarantee end side, and end side after HARQ finishes dealing with, carry out before subsequent treatment, this MAC PDU being discarded;
Posttectonic MAC PDU is sent to terminal on semi-continuous PDSCH resource.
Preferably, the form with MAC PDU is configured to preset comprises:
The length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, only comprise a MAC PDUsubheader who adopts form R/R/E/LCID in MAC header, wherein five of the LCID field bits extend this as 11111.
Preferably, further comprise:
The MAC PDU that records this transmission in current HARQ process is posttectonic MAC PDU.
Preferably, further comprise:
Determine that the ACK/NACK feedback that receives is for posttectonic MAC PDU;
Discharge the shared HARQ process of posttectonic MAC PDU that sends.
A kind of base station is provided in the embodiment of the present invention, has comprised:
Determination module is used for determining that the data cached of logic channel of semi-continuous scheduling is empty, and has semi-continuous PDSCH resource in current TTI;
Constructing module, for the form that MAC PDU is configured to preset, the MACPDU of form that should be default can carry out normal decoding and HARQ processes according to this MAC PDU in order to guarantee end side, and end side after HARQ finishes dealing with, carry out before subsequent treatment, this MAC PDU being discarded;
Sending module is used for posttectonic MAC PDU is sent to terminal on semi-continuous PDSCH resource.
Preferably, constructing module is further used for when the form that MAC PDU is configured to preset, the length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, only comprise a MAC PDU subheader who adopts form R/R/E/LCID in MAC header, wherein five of the LCID field bits extend this as 11111.
Preferably, further comprise:
Logging modle is posttectonic MAC PDU for the MAC PDU that records this transmission in current HARQ process.
Preferably, further comprise:
Feedback processing modules, being used in the ACK/NACK feedback of determining to receive is for during posttectonic MACPDU, discharges the shared HARQ process of posttectonic MAC PDU that sends.
Beneficial effect of the present invention is as follows:
For the TDD-LTE system, at descending semi-continuous scheduling logic channel without data cached, but in the situation that there is the PDSCH resource in current TTI, agreement is not stipulated the processing mode of base station side, and the embodiment of the present invention has provided the processing scheme of base station side in this kind situation.
Description of drawings
Fig. 1 is the data package processing method implementing procedure schematic diagram of semi-continuous scheduling in the embodiment of the present invention;
Fig. 2 is the transmission processing implementing procedure schematic diagram of MAC PDU in the embodiment of the present invention;
Fig. 3 is the processing implementing procedure schematic diagram after terminal feedback ACK/NACK in the embodiment of the present invention;
Fig. 4 is architecture of base station schematic diagram in the embodiment of the present invention.
Embodiment
The inventor notices in the invention process:
In the TDD-LTE system, use the logic channel of generic downlink dynamic dispatching, the TTI of this logical channel data not in the eNodeB buffer memory, to can not dispatch this logic channel and be this logical channel assignment PDSCH resource, there is no need this moment also can not send PDCCH and MAC PDU for this logic channel, owing to there is no PDCCH, terminal can not receive the upper data of PDSCH yet.
But, in the TDD-LTE system, logic channel for descending use semi-continuous scheduling, its semi-continuous PDSCH resource is the periodic resources of distributing by the PDCCH that once sends, terminal can be according to relevant informations such as the resource of PDCCH indicating and transmission blocks, and the pre-configured cycle of high-level signaling, periodically specifying detection and reception MAC PDU data on the PDSCH resource, therefore no matter whether eNodeB sends, terminal all can detect and receive the MACPDU data on the periodic PDSCH resource of allocating in advance.
Because the PDSCH resource of semi-continuous scheduling is the periodic resources of allocating in advance, mate fully with the interface-free resources of allocating in advance and the business datum that is carried on descending semi-continuous resource arrives the rule of base station (eNodeB) and data volume is very difficult, therefore just may appear at the TTI that has half-persistence scheduling resources, base station (eNodeB) semi-continuous scheduling logic channel is without data cached situation about sending out.
Yet, be not defined in descending semi-continuous scheduling logic channel in prior art without data cached, but have the TTI of PDSCH resource, the processing mode of base station (eNodeB) side.Therefore, the below does not send data with simple analysis and sends processing mode possible under the data both of these case in the base station, and and then draws design of the present invention.
(1), the base station does not send data.Can there be following problem in processing like this.
A) as previously mentioned, for the TDD-LTE system, because semi-continuous PDSCH resource is the periodic resources of allocating in advance, terminal can periodically specified detection and reception MAC PDU data on the PDSCH resource, if data are not sent out this moment in the base station, terminal still can go to detect and receive data on preassigned PDSCH resource.Obviously this moment, terminal can't be correct detects data, its demodulation coding result must be NACK, and can NACK be fed back to the base station by control channel and require the base station to retransmit, and terminal can't judge that be that the base station do not return be the decoding error of eating dishes without rice or wine this moment actually, present case can be processed as the mistake piece.Because terminal is measured down channel quality and need to be considered the Block Error Rate of eating dishes without rice or wine, CQI (the Channel Quality Indicator that above-mentioned situation will cause terminal to measure, the channel quality indication) lower than actual value, can cause the adjustment that the base station is unnecessary after this CQI value reporting base station, as issue the modulating-coding grade that PDCCH adjusts semi-continuous resource or reduces other dynamic dispatching business of this user, reduce resource utilization ratio.Terminal may have other mistake piece post-processing algorithm in addition, and above-mentioned situation also will affect the accuracy of relevant treatment;
(2), the base station sends data.
A) if the base station sends data in this case, the Data Detection of terminal receives and HARQ (Hybrid Automatic Repeat Request, mixed automatic repeat request) result is believable, can not have (1) A) in problem;
B) because semi-continuous PDSCH resource is the periodic resources of allocating in advance, do not sending data when data cached, this resource can not be distributed to other users and use, therefore send invalid data and also can not cause the waste of resource this moment.
C) base station (eNodeB) sends data in this case, must assurance can not cause end side restructuring and the problem that reorders, and can not cause processing data packets to be made mistakes.
As seen, at descending semi-continuous scheduling logic channel without data cached but have the TTI of PDSCH resource, the transmission data are compared and are not sent out data, can avoid the multiple adverse effect to system, but, the problems such as the data that send also must assurance can not cause that end side is recombinated and reordered can not cause processing data packets to be made mistakes.
Based on this, a kind of Packet Generation scheme of semi-continuous scheduling will be provided in the embodiment of the present invention, be used in the TDD-LTE system, base station side is without data cached in the situation that the user has half-persistence scheduling resources, and base station (eNodeB) sends default, special packet.Do not affect the restructuring of terminal data bag and to reorder and wait on the basis of processing guaranteeing, keeping correct HARQ process to avoid affecting terminal to the channel quality Accuracy of Judgement and then to affect the accuracy of terminal inner relevant treatment.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 1 is the data package processing method implementing procedure schematic diagram of semi-continuous scheduling, as shown in the figure, can comprise the steps:
In enforcement, for the TDD-LTE system, the agreement regulation, the byte of padding in MAC PDU payload can be arbitrary value, and UE (User Equipment, subscriber equipment) will not process these filling informations.Therefore, the form with MAC PDU is configured to preset can comprise:
The length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, (wherein, R:Reserved bit (reserved bit position) is set to " 0 " only to comprise an employing form R/R/E/LCID in MAC header; E:Extension field (extension bits); LCID:Logical Channel ID, Logic Channel Identifier) MAC PDU subheader (son head), wherein five of the LCID field bits extend this as 11111.
In concrete enforcement, format description and field detailed meanings can be referring to 3GPP TS 36.321-930: " Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification " 6.1 joints and 6.2 save.
Having adopted in force above-mentioned make to be because this mode easily realizes, is also the example of lifting according to the regulation of current agreement; But, in theory, mode with other also is fine, as long as can guarantee end side can carry out normally decoding and HARQ and process, and after terminal HARQ finishes dealing with, carry out being dropped before subsequent treatment and get final product, above-mentioned make only is used for instruction those skilled in the art and specifically how implements the present invention, but does not mean and only can use this mode, can determine corresponding mode in conjunction with factors such as practice needs and agreement regulations in implementation process.
In enforcement, can further include:
In enforcement, can further include:
In above-mentioned enforcement, the processing scheme of this packet comprises 2 aspects:
(1) this semi-continuous scheduling logic channel of base station side without data cached, organized out special MAC PDU (also namely posttectonic, default MAC PDU) and is sent in the situation that the user has half-persistence scheduling resources.This special MAC PDU can guarantee that end side can carry out normally decoding and HARQ and process, and after terminal HARQ finishes dealing with, carry out subsequent treatment before, can be dropped according to the regulation of agreement, thereby do not affect terminal data bag restructuring and the processing such as reorder;
(2) after the special MAC PDU of transmission, for the HARQ result feedback (ACK/NACK) of terminal pins to this special MAC PDU, base station side discharges corresponding HARQ process without exception, does not carry out retransmission process.
Also as the above analysis, the MAC PDU that above-mentioned structure is special and to these two aspects of processing of ACK/NACK, with respect in prior art at descending semi-continuous scheduling logic channel without data cached, but exist in the situation of TTI of PDSCH resource, the base station does not have this deficiency of processing scheme all can separately implement, and just has implementation result better when these two makes up.
The below describes with example again.
Fig. 2 is the transmission processing implementing procedure schematic diagram of MAC PDU, as shown in the figure, for the TDD-LTE system, for a semi-continuous scheduling logic channel, when there was the TTI of semi-continuous PDSCH resource in it, eNodeB can comprise the steps: when the semi-continuous scheduling user data is carried out transmission processing
Step 205, divide the length of timing appointment according to semi-continuous resource, according to normal mode group MAC PDU and send.
In enforcement, eNodeB is known the data cached situation of this logic channel, if for empty go out correct MAC PDU and send according to protocol groups, otherwise the length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, only comprise a MAC PDU subheader who adopts the R/R/E/LCID form in its MAC header, wherein five of the LCID field bits extend this as 11111.
Further, can to record the MAC PDU of this transmission of current HARQ process be a kind of special MAC PDU to eNodeB;
ENodeB sends to terminal with MAC PDU on semi-continuous resource, except structure default MACPDU and the processing to ACK/NACK, and remaining transmission processing and have when data cached processing identical.
For the ACK/NACK that terminal produces, after these data were sent completely, base station (eNodeB) can wait for the ACK/NACK feedback for this MAC PDU.The below is to receiving ACK/NACK when feedback, and the processing of base station (eNodeB) describes.
Fig. 3 is the processing implementing procedure schematic diagram after terminal feedback ACK/NACK, and as shown in the figure, when receiving the ACK/NACK feedback, the handling process of stand (NodeB) can comprise the steps:
The ACK/NACK feedback is received in step 301, base station;
In enforcement, the base station judge this ACK/NACK feedback for MAC PDU whether be the special MAC PDU that presets, if not, carry out respective handling according to the ACK/NACK situation; Otherwise the HARQ process of release busy.
Based on same inventive concept, a kind of base station also is provided in the embodiment of the present invention, because the principle of dealing with problems in the base station is similar to a kind of data package processing method of semi-continuous scheduling, so the enforcement of base station can referring to the enforcement of method, repeat part and repeat no more.
Fig. 4 is the architecture of base station schematic diagram, as shown in the figure, can comprise in the base station:
Determination module 401 is used for determining that the data cached of logic channel of semi-continuous scheduling is empty, and has semi-continuous PDSCH resource in current TTI;
Constructing module 402, for the form that MAC PDU is configured to preset, the MAC PDU of form that should be default can carry out normal decoding and HARQ processes according to this MAC PDU in order to guarantee end side, and end side after HARQ finishes dealing with, carry out before subsequent treatment, this MAC PDU being discarded;
Sending module 403 is used for posttectonic MAC PDU is sent to terminal on semi-continuous PDSCH resource.
In enforcement, constructing module can be further used for when the form that MAC PDU is configured to preset, the length of dividing the timing appointment according to semi-continuous resource, the MACPDU that to organize out a payload part be filling bit, only comprise a MAC PDUsubheader who adopts form R/R/E/LCID in MAC header, wherein five of the LCID field bits extend this as 11111.
In enforcement, the base station may further include:
Logging modle 404 is posttectonic MAC PDU for the MAC PDU that records this transmission in current HARQ process.
In enforcement, the base station may further include:
Feedback processing modules 405, being used in the ACK/NACK feedback of determining to receive is for during posttectonic MAC PDU, discharges the shared HARQ process of posttectonic MAC PDU that sends.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, can realize the function of each module or unit in same or a plurality of softwares or hardware when enforcement is of the present invention.
By above-described embodiment as can be known, for the processing of the eNodeB in the TDD-LTE system to semi-continuous scheduling, in the technical scheme that the embodiment of the present invention provides:
This semi-continuous scheduling logic channel of base station side without data cached, organized out default, special MAC PDU and is sent in the situation that the user has half-persistence scheduling resources.The structural scheme of special MACPDU further, is provided;
For the HARQ result feedback (ACK/NACK) of this special MAC PDU, also provide the processing scheme of base station (eNodeB).
As seen, the technical scheme that provides by the embodiment of the present invention, at first, for the TDD-LTE system, in the situation that the processing mode of agreement base station side when not being defined in descending semi-continuous scheduling logic channel without the TTI of data cached but semi-continuous resource, the embodiment of the present invention has provided processing scheme.
Secondly, by analyzing and contrast possible processing mode, the technical scheme that the embodiment of the present invention provides is conducive to guarantee the accuracy of end side channel quality detection and mistake piece statistical accuracy and relevant treatment.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the present invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction of carrying out on computer or other programmable devices.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (4)
1. the data package processing method of a semi-continuous scheduling, is characterized in that, comprises the steps:
The data cached of logic channel of determining semi-continuous scheduling is sky, and has semi-continuous Physical Downlink Shared Channel PDSCH resource at current transmission time interval TTI;
The form that media access control protocol data unit MAC PDU is configured to preset, the MAC PDU of form that should be default can carry out normal decoding and mixed automatic repeat request HARQ processes according to this MAC PDU in order to guarantee end side, and end side after HARQ finishes dealing with, carry out before subsequent treatment, this MAC PDU being discarded;
Posttectonic MAC PDU is sent to terminal on semi-continuous PDSCH resource;
The MAC PDU that records this transmission in current HARQ process is posttectonic MAC PDU;
Determine that the ack/nack ACK/NACK feedback that receives is for posttectonic MAC PDU;
Discharge the shared HARQ process of posttectonic MAC PDU that sends.
2. the method for claim 1, is characterized in that, the form with MAC PDU is configured to preset comprises:
The length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, only comprise a MAC PDU subheader who adopts form R/R/E/LCID in MAC header, wherein five of the LCID field bits extend this as 11111.
3. a base station, is characterized in that, comprising:
Determination module is used for determining that the data cached of logic channel of semi-continuous scheduling is empty, and has semi-continuous PDSCH resource in current TTI;
Constructing module, for the form that MAC PDU is configured to preset, the MAC PDU of form that should be default can carry out normal decoding and HARQ processes according to this MAC PDU in order to guarantee end side, and end side after HARQ finishes dealing with, carry out before subsequent treatment, this MAC PDU being discarded;
Sending module is used for posttectonic MAC PDU is sent to terminal on semi-continuous PDSCH resource;
Logging modle is posttectonic MAC PDU for the MAC PDU that records this transmission in current HARQ process;
Feedback processing modules, be used for the ACK/NACK feedback of determining to receive be for posttectonic MAC PDU in, discharge the shared HARQ process of posttectonic MAC PDU that sends.
4. base station as claimed in claim 3, it is characterized in that, constructing module is further used for when the form that MAC PDU is configured to preset, the length of dividing the timing appointment according to semi-continuous resource, the MAC PDU that to organize out a payload part be filling bit, only comprise a MAC PDU subheader who adopts form R/R/E/LCID in MAC header, wherein five of the LCID field bits extend this as 11111.
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| CN101500309A (en) * | 2008-01-30 | 2009-08-05 | 大唐移动通信设备有限公司 | Method, system and apparatus for allocating dedicated scheduling request resource |
| CN101646202A (en) * | 2009-08-25 | 2010-02-10 | 普天信息技术研究院有限公司 | Realizing method of semi-static dispatching downlink transmission |
| EP2166805A1 (en) * | 2008-09-17 | 2010-03-24 | Panasonic Corporation | Semi-persistent schedulded resource release procedure in a mobile communication network |
| CN101924618A (en) * | 2009-06-12 | 2010-12-22 | 重庆重邮信科通信技术有限公司 | Implementation method of HARQ in TD-HSUPA |
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| CN101500309A (en) * | 2008-01-30 | 2009-08-05 | 大唐移动通信设备有限公司 | Method, system and apparatus for allocating dedicated scheduling request resource |
| EP2166805A1 (en) * | 2008-09-17 | 2010-03-24 | Panasonic Corporation | Semi-persistent schedulded resource release procedure in a mobile communication network |
| CN101924618A (en) * | 2009-06-12 | 2010-12-22 | 重庆重邮信科通信技术有限公司 | Implementation method of HARQ in TD-HSUPA |
| CN101646202A (en) * | 2009-08-25 | 2010-02-10 | 普天信息技术研究院有限公司 | Realizing method of semi-static dispatching downlink transmission |
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