CN101753196B - Selection method and device of transport format combination - Google Patents
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Abstract
The invention provides selection method and device of transport format combination. The method comprises the following steps of: (a) sequencing all transport channels according to the highest priority of logical channels mapped on the transport channels in a descending order manner; (b) selecting the transport format (TF) of all transport channels in sequence according to the sequencing result of the step (a) and updating an effective transport format combination (TFC) set according to a selection result; and (c) selecting the most optimum from the effective TFC set. In the method and the device of the invention, all transport channels are arranged according to the highest logical channel priority of the logical channels mapped on the transport channels, the number of elements needed to sequence is greatly reduced, and the processing efficiency is improved.
Description
Technical field
The present invention relates to the TDSCDMA system, particularly relate to a kind of system of selection and device thereof of transformat combination of MAC layer.
Background technology
in data link layer, MAC (Media Access Control, the media access control) layer is RLC (Radio Link Control, Radio Link control) provide logic channel (Logical Channel, LC) be used for the data of carrying RLC, and physical layer provides transmission channel (Transport Channel for the MAC layer, TrCH) be used for the data of carrying MAC layer, every transmission channel TrCH can only be with some set form the transmission of data, these set forms are called as TFS (Transport Format Set, TFS Transport Format Set), be multiplexed to a CCTrCH (Code Composite Transport Channel, the coded combination transmission channel) all transmission channel TrCH are configured a TFCS (Transport Format CombinationsSet, transport format combination set, be abbreviated as the TFC set), an element in the TFC set is TFC (Transport Format Combinations, transformat combination), it is at certain TTI (TransportTime Interval, Transmission Time Interval) TF (the Transport Format of each transmission channel TrCH of the moment, transformat) combination.Transformat TF can be divided into dynamic part and semi-static part, and dynamic part comprises TB (Transport Block, transmission block) size and transmission block number, and semi-static part comprises TTI, chnnel coding type, code rate, CRC size etc.Wherein, CRC (Cyclic Redundancy Check) is cyclic redundancy check (CRC).
The transmission channel TrCH that MAC provides divides Common transport channel and dedicated transmission channel (DedicatedTransport Channel, DCH).Common transport channel and dedicated transmission channel can not be multiplexed on a CCTrCH, and their TFC set is configured respectively.After having configured the TFC set of the TFS of every transmission channel TrCH and CCTrCH, UE (User Equipment, subscriber equipment) the transformat communication that the MAC layer of equity just can be according to a preconcerted arrangement and between UTRAN (Universal Terrestrial Radio Access Network, Universal Terrestrial Radio Access Network).At each TTI, MAC is that every instantaneous source speed on transmission channel TrCH is selected a TF in TFS, and the transformat combination of all transmission channel TrCH must be in the TFC set.
When carrying out the design of mobile communcations system, guarantee that the MAC layer can go out suitable TFC according to the data selection in a TTI and can not select failure, and will guarantee that the MAC layer can select TFC rapidly.
The selection course of TFC is exactly to select optimal TFC form according to certain criterion for transmission from current effective TFC set.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of system of selection and device of transformat combination, to improve treatment effeciency.
In order to address the above problem, the invention provides a kind of system of selection of transformat combination, the method comprises the following steps:
(a) limit priority with all transmission channels logic channel on it according to mapping sorts by from high to low order;
(b) ranking results according to step (a) carries out transformat TF selection to all transmission channels successively, and upgrades effective transport format combination set TFC set according to selection result;
(c) select most suitable transformat combination TFC from effective TFC set.
Further, step (a) also comprises before: whether needs carry out transport format combination selection to described transmission channel according to described Transmission Time Interval indication judgement; In step (a), (b), described all transmission channels refer to that all need to carry out the transmission channel that transformat combination TFC selects.
Step (a) further comprises:
The logic channel that (a1) will be mapped on same transmission channel sorts according to priority of logical channels; (a2) the highest priority of logical channels by the logic channel that shines upon on every transmission channel sorts to transmission channel;
In step (b), when certain transmission channel was carried out the TF selection, if there is a logic channel to be mapped in described transmission channel, the buffer area according to described logic channel took situation selection transformat TF; If there are many logic channels to be mapped on described transmission channel, successively logic channel is carried out TF according to priority of logical channels order from high to low and selects, during selection according to the situation that takies of logic channel buffer area.
Further, in step (b), when certain transmission channel is carried out the TF selection, comprising:
(b1) according to effectively TFC set, for each TF on this transmission channel sets up a TFC list that comprises it;
(b2) logic channel that is mapped on this transmission channel is carried out the TF selection, and select the effective TFC set of corresponding TFC list update according to TF.
Further, step (c) if in effectively only have a TFC eligible in the TFC set, select this TFC; If have a plurality ofly, select most suitable TFC according to following methods: be in and hold attitude if having the TFC of minimum speed limit, select this TFC; Otherwise the TFC of inspection time low rate, can hold attitude if be in successively, selects this TFC; If all TFC all are in the overpower attitude, select to have the TFC of minimum speed limit.
For solving the problems of the technologies described above, the present invention also provides a kind of choice device of transformat combination, and this device is realized at subscriber equipment, comprises media access control module, wherein,
Described media access control module, be used for the limit priority of all transmission channels logic channel on it according to mapping is sorted by from high to low order, and be used for successively all transmission channels being carried out the TF selection, and upgrade effective transport format combination set TFC set according to selection result; Also be used for selecting most suitable transformat combination TFC from effective TFC set.
Further, described media access control module comprises sequencing unit and selected cell, described sequencing unit is used for according to the attribute information of transmission channel, transmission channel and logic channel being sorted, sort as follows: the logic channel that will be mapped on same transmission channel sorts according to priority of logical channels, then by the highest priority of logical channels of the logic channel that shines upon on every transmission channel, transmission channel is sorted;
The buffer area that described selected cell is used for the query logic channel takies, and also select in conjunction with Query Result, logic channel being carried out TF according to putting in order of logic channel according to the transformat indication, thereby realization is to the TF selection of the transmission channel of mapping.
Further, described media access control mould also comprises the selection judging unit, is used for according to Transmission Time Interval indication and judge transmission channel whether needs carry out the TFC selection;
The transmission channel of described sequencing unit and described selected cell effect is according to selecting the judgment unit judges needs to carry out the transmission channel that TFC selects.
Further, described media access control mould comprises that also TFC selects updating block, be used for upgrading effective TFC set according to the selection result of TF selected cell, and finally select most suitable TFC, most suitable TFC chooses like this: if effectively only have a TFC eligible in the TFC set, select this TFC; If have a plurality ofly, select most suitable TFC according to following methods: be in and hold attitude if having the TFC of minimum speed limit, select this TFC; Otherwise the TFC of inspection time low rate, can hold attitude if be in successively, selects this TFC; If all TFC all are in the overpower attitude, select to have the TFC of minimum speed limit.
Further, it is to realize so effective TFC set renewal that described TFC selects updating block: first effectively TFC set of basis, for each TF on the transmission channel that carries out the TF selection sets up a TFC list that comprises it; The effective TFC set of the TFC list update corresponding according to the TF selection result again.
Compared to prior art, in the inventive method and device, each transmission channel is arranged according to the highest priority of logical channels of shining upon the logic channel on it, thereby greatly reduced the number that needs the element of sequence, and whether needs carry out the TFC selection judge transmission channel according to TTI indication, participate in thereby reduced the logic channel number that TFC selects, improve treatment effeciency.
Description of drawings
Fig. 1 is the system of selection schematic diagram of transformat combination of the present invention.
Fig. 2 is the algorithm flow chart of TFC system of selection of the present invention;
Fig. 3 is the choice device structure chart of transformat combination of the present invention.
Embodiment
The system of selection of transformat combination of the present invention and the main thought of device be, according to the limit priority of the logic channel that shines upon on transmission channel, transmission channel sorted, then carry out successively the selection of transformat combination TFC.
As shown in Figure 1, the system of selection of transformat combination of the present invention comprises the following steps:
Step 101: the limit priority of all transmission channels logic channel on it according to mapping is sorted by from high to low order;
Logic channel is sorted according to priority of logical channels MLP (MAC layer priority of logical channels); At first the logic channel that is mapped on same transmission channel is sorted by MLP, then sort by the highest MLP of the logic channel of the mapping on every transmission channel, having, all logic channels of the transmission channel of the highest MLP come the front.
Step 102: successively all transmission channels are carried out the TF selection according to the ranking results of step 101, and upgrade effective transport format combination set TFC set according to selection result;
From current effective TFC set, according to each logic channel service priority and logic channel buffer area occupancy, choose suitable transformat, further choose TFC according to the transformat of choosing.
Step 103: select most suitable TFC from effective TFC set.
The present invention follows protocol requirement, pays the utmost attention to data volume on the high priority logic channel, has simplified simultaneously the step according to the priority of logical channels sequence, has improved efficient.
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is made further more detailed description, but not as a limitation of the invention.
As shown in Figure 2, the MAC layer for the user equipment (UE) side carries out the flow chart that TFC selects.This flow process is applicable to the TDSCDMA system, can improve the speed that TFC selects.Before describing realization flow, the basic demand of in agreement, TFC being selected is described.
By giving priority of logical channels of each logic channel LC assignment, RRC (Radio ResourceControl, Radio Resource control) scheduling of uplink data can be controlled in the sublayer, and the assigned priority of logical channels in TFC selective basis RRC sublayer in user equipment (UE) is carried out.Because logic channel LC has absolute priority, so as far as possible at first user equipment (UE) should send the data with limit priority.
When carrying out the TFC selection, which TFC user equipment (UE) will assess can be supported.Before carrying out the TFC selection, at first will set up an effective TFC set, all TFC in set will meet the following conditions:
1. belong to this TFC set, and do not limited by high-level signaling (such as, TFC Control sees 3GPP TS 25.331)
2. be not in blocked state;
3 is compatible with the RLC configuration;
4. require RLC not produce and fill PDU (referring to the definition in 3GPP TS 25.322).
5. can not transmit the bit number over transfer capability in a TTI.
UE can delete the TFC that is in over-power condition from effective TFC set, this is in order to guarantee the quality of those application to the quality of service sensitivity (as voice).But this operation is not suitable for the TFC (seeing 3GPP TS 25.331) in the TFC minimal set.
Effectively following two kinds of situations have been considered in the TFC set:
1, considered the TFC set of TF of the current use of the current transmission channel that is in unactivated state, if current unactivated transmission channel has been selected certain TF before, when so current TFC selected, the TF of these transmission channels should not change; 2, considered the state of TFC, the current TFC that blocks attitude that is in should not be comprised in effective TFC set.
The selection of TFC should effectively carried out in the TFC set, and should satisfy successively following condition:
1. do not have other TFC can send more highest priority data;
2. do not have other TFC can send more from the data of hanging down a prioritization logic channel.Remaining priority is reused this rule;
3. do not have other TFC lower than selected TFC bit rate.
After the basic demand that TFC selects was narrated, the below further described the realization flow of selection of the TFC of MAC layer, and this flow process specifically comprises:
Step 200, beginning, and carry out initialization operation, mainly comprise:
A, whether needs carry out transport format combination selection to described transmission channel according to described Transmission Time Interval indication judgement;
Specifically can judge whether to meet according to current CFN (Connection Frame Number) TTI of each transmission channel, when CFN is 0 to the TTI delivery value of each transmission channel, think that this transmission channel need to participate in this TFC and select, can reduce through this determining step and participate in the logic channel number that TFC selects, improve processing speed.
B, will judge that need to carry out transmission channel that TFC selects sorts according to the logic channel limit priority of correspondence, sort method is:
At first the logic channel that is mapped on same transmission channel is sorted by MLP (MAC layer priority of logical channels), the highest MLP by the logic channel of the mapping on every transmission channel sorts again, have that all logic channels of the transmission channel of the highest MLP come the front, the CCtrCH subscript of this transmission channel is stored in an interim transmission channel subscript index.
Sequence for logic channel is not exclusively carried out according to priority of logical channels, say accurately according to the limit priority sequence that is mapped to the logic channel on every transmission channel, this be because, for different transmission channels, the limit priority that only is mapped to the logic channel above it just can play a decisive role to TFC order of preference each other, and each transmission channel internal logic channel priority only can affect the TF selection of this transmission channel.
Step 201 makes that S0=S is effective TFC set, if available TFC number be 0 or the logic channel number be 0, generate and print out the wrong message, flow process finishes, otherwise execution in step 202;
Step 202, utilize cycle counter that the transmission channel that carries out the TFC selection is counted, be limited to the sum of the transmission channel (i.e. judgement need to be carried out the transmission channel that TFC selects) that activates in CCtrCH on this counter, from i=0, namely begin to count from the highest transmission channel of relative priority of logical channels;
Step 203 according to effective TFC set, if the TF number of i bar transmission channel is not 0, for each TF on this transmission channel sets up a TFC list that comprises it, if only have a TFC to satisfy condition, is selected this TFC, and flow process finishes; If the TFC that does not satisfy condition generates and prints out the wrong message, flow process finishes; Otherwise execution in step 204;
The TFC list of each TF is called a TFC subset.
Step 204 is carried out the TF selection to the logic channel that is mapped on this transmission channel;
All logic channels that are mapped to this transmission channel are carried out TF select, exactly this transmission channel is carried out TF and select, the scope of selection is the TF in the TFI indication.
If only have a logic channel to be mapped on this transmission channel, i.e. single mapping to list, check so the pattern of RLC, be divided into three kinds of situations of RLC TM_seg pattern, RLC AM and RLC TM_noseg pattern and RLCUM pattern and take situation in conjunction with the logic channel buffer area and carry out respectively the TF selection;
If there are many logic channel numbers to be mapped on this transmission channel, namely many situations to single mapping, select TF successively according to the priority of logical channels that is mapped to all logic channels on this transmission channel.The selection of each logic channel TF is divided into equally RLC TM_seg pattern, RLC AM and RLC TM_noseg pattern and three kinds of situations of RLC UM pattern and takies situation in conjunction with the logic channel buffer area carries out respectively the TF selection.
The logic channel of low priority carries out TF and selects take the TF selection result of high priority logic channel as the basis.
Step 205, according to the TFC subset that the TF selection of selecting satisfies condition, if TFC subset non-NULL, upgrading S is the set that comprises the TFC that satisfies condition, if only have a TFC who satisfies condition, selects this TFC, flow process finishes; The TFC that does not satisfy condition generates and prints out the wrong message; Otherwise execution in step 207;
Be exemplified below: establishing former effective TFC set is S={TFC1, TFC2, TFC3, TFC4}, if two transformats of TF1 and TF2 are arranged, the TFC that wherein comprises TF1 has TFC1, TFC2, TFC3, the TFC4 that has that comprises TF2, for each TF sets up a TFC list that comprises it, that is: set up the TF1 list and be { TFC1, TFC2, TFC3}; The list of TF2 is { TFC4}; If further carry out selecting TF1 when TF selects according to logic channel, the S after upgrading only comprises the TF1 list, is { TFC1, TFC2, TFC3}.
Step 206, if arrived the sum of the transmission channel of activation, execution in step 207, are i=i+1 otherwise counter adds 1, turn execution in step 203;
Step 207 is selected a suitable TFC from effective TFC set.
When selecting TFC, if the S after final updated, namely effectively the TFC set only comprises a TFC, selects this TFC.If the more than TFC of final TFC set-inclusion selects a most suitable TFC as follows: be in and hold attitude if having the TFC of minimum speed limit, select this TFC; Otherwise, check and the TFC of time low rate can hold attitude if be in, select this TFC, by that analogy, if until last TFC check finish after, find that all TFC all are in the overpower attitude, select to have the TFC of minimum speed limit.
As shown in Figure 3, the TFC choice device of user terminal UE of the present invention comprises: media access control (MAC) module 31, Radio Resource are controlled (RRC) module 32, physical layer 33, logic link control (RLC) module 34.
The MAC module comprises selects judging unit, sequencing unit, TF selected cell and TFC to select updating block, wherein,
Select judging unit, for the Transmission Time Interval TTI indication that receives physical layer block 23 transmissions, and whether needs carry out the TFC selection to judge transmission channel according to this TTI indication;
Sequencing unit, the attribute information that is used for the transmission channel of reception radio resource control RRC module transmission, and according to this attribute information, transmission channel and the logic channel that needs carry out the TFC selection sorted, sort as follows: the logic channel that will be mapped on same transmission channel sorts according to priority of logical channels, then sorts by the highest MLP of the logic channel that shines upon on every transmission channel transmission channel is sorted;
The TF selected cell, the buffer area that is used for the query logic channel takies, also select in conjunction with Query Result, logic channel being carried out TF according to putting in order of logic channel according to transformat indication TFI (transport format indicator), thereby realization is to the TF selection of the transmission channel of mapping;
To being mapped in a plurality of logic channels on same transmission channel, carrying out successively TF according to priority of logical channels and select.
TFC selects updating block, is used for preserving effective TFC set, and upgrades effective TFC set according to the selection result of TF selected cell, and finally selects most suitable TFC, sends data to adopt this transformat combination TFC.
TFC selects updating block can adopt the described mode of above method to upgrade, that is: according to effective TFC set, for each TF on the transmission channel that carries out the TF selection sets up a TFC list that comprises it; The effective TFC set of the TFC list update corresponding according to the TF selection result again.
Adopt the inventive method to guarantee that the MAC layer of TD-SCDMA system can go out suitable TFC according to the data selection in a TTI rapidly, thereby greatly improved the speed that TFC selects.
The present invention has following characteristics:
When 1) carrying out the TFC selection, do not need every equal query caching of logic channel is taken, but indication judges the transmission channel step whether needs carry out the TFC selection according to TTI, has reduced and has participated in the logic channel number that TFC selects, and has improved processing speed;
2) in strict accordance with the principle of agreement, comparatively speaking, the algorithm that adopts has taken into full account total data to be transferred amount on the transmission channel and has selected.
3) following on the basis of agreement, not all logic channels to be put together sort according to priority of logical channels, but each transmission channel is arranged according to the highest priority of logical channels of shining upon the logic channel on it, thereby greatly reduced the number that needs the element of sequence, increased efficient.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1. the system of selection of a transformat combination, is characterized in that, the method comprises:
(a) limit priority with all transmission channels logic channel on it according to mapping sorts by from high to low order, and specifically comprise: the logic channel that (a1) will be mapped on same transmission channel sorts according to priority of logical channels; (a2) the highest priority of logical channels by the logic channel that shines upon on every transmission channel sorts to transmission channel;
(b) ranking results according to step (a) carries out transformat (TF) selection to all transmission channels successively, and upgrades effective transport format combination set (TFC) set according to selection result; When certain transmission channel was carried out the TF selection, if there is a logic channel to be mapped in described transmission channel, the buffer area according to described logic channel took situation selection transformat TF; If there are many logic channels to be mapped on described transmission channel, successively logic channel is carried out TF according to priority of logical channels order from high to low and selects, during selection according to the situation that takies of logic channel buffer area;
(c) select most suitable transformat combination TFC from effective TFC set.
2. the method for claim 1 is characterized in that:
Step (a) also comprises before: whether needs carry out transport format combination selection to described transmission channel according to described Transmission Time Interval indication judgement; In step (a), (b), described all transmission channels refer to that all need to carry out the transmission channel that transformat combination TFC selects.
3. method as claimed in claim 1 or 2 is characterized in that: in step (b), certain transmission channel is carried out TF when selecting, comprising:
(b1) according to effectively TFC set, for each TF on this transmission channel sets up a TFC list that comprises it;
(b2) logic channel that is mapped on this transmission channel is carried out the TF selection, and select the effective TFC set of corresponding TFC list update according to TF.
4. method as claimed in claim 1 or 2 is characterized in that:
Step (c) if in effectively only have a TFC eligible in the TFC set, select this TFC; If have a plurality ofly, select most suitable TFC according to following methods: be in and hold attitude if having the TFC of minimum speed limit, select this TFC; Otherwise the TFC of inspection time low rate, can hold attitude if be in successively, selects this TFC; If all TFC all are in the overpower attitude, select to have the TFC of minimum speed limit.
5. the choice device of a transformat combination, this device is realized at subscriber equipment, comprises media access control module, it is characterized in that:
Described media access control module, be used for the limit priority of all transmission channels logic channel on it according to mapping is sorted by from high to low order, and be used for successively all transmission channels being carried out (TF) selection, and upgrade effective transport format combination set (TFC) set according to selection result; Also be used for selecting most suitable transformat combination TFC from effective TFC set;
Described media access control module comprises sequencing unit and selected cell, described sequencing unit is used for according to the attribute information of transmission channel, transmission channel and logic channel being sorted, sort as follows: the logic channel that will be mapped on same transmission channel sorts according to priority of logical channels, then by the highest priority of logical channels of the logic channel that shines upon on every transmission channel, transmission channel is sorted; The buffer area that described selected cell is used for the query logic channel takies, and also select in conjunction with Query Result, logic channel being carried out TF according to putting in order of logic channel according to the transformat indication, thereby realization is to the TF selection of the transmission channel of mapping.
6. device as claimed in claim 5 is characterized in that:
Described media access control module also comprises the selection judging unit, is used for according to Transmission Time Interval indication and judge transmission channel whether needs carry out the TFC selection;
The transmission channel of described sequencing unit and described selected cell effect is according to selecting the judgment unit judges needs to carry out the transmission channel that TFC selects.
7. device as claimed in claim 5 is characterized in that:
Described media access control module comprises that also TFC selects updating block, be used for upgrading effective TFC set according to the selection result of TF selected cell, and finally select most suitable TFC, most suitable TFC chooses like this: if effectively only have a TFC eligible in the TFC set, select this TFC; If have a plurality ofly, select most suitable TFC according to following methods: be in and hold attitude if having the TFC of minimum speed limit, select this TFC; Otherwise the TFC of inspection time low rate, can hold attitude if be in successively, selects this TFC; If all TFC all are in the overpower attitude, select to have the TFC of minimum speed limit.
8. device as claimed in claim 7, it is characterized in that: it is to realize so effective TFC set renewal that described TFC selects updating block: first according to effectively TFC set, for each TF on the transmission channel that carries out the TF selection sets up a TFC list that comprises it; The effective TFC set of the TFC list update corresponding according to the TF selection result again.
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| CN105262561A (en) * | 2014-07-18 | 2016-01-20 | 深圳市中兴微电子技术有限公司 | Method and device for selecting transport format combinations |
| CN108260210B (en) | 2016-12-29 | 2022-02-11 | 华为技术有限公司 | A data transmission method, user equipment, and wireless access equipment |
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| CN1972462A (en) * | 2005-11-23 | 2007-05-30 | 大唐移动通信设备有限公司 | Packet service scheduling method in mobile communication system |
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