CN101170389B - Method for selecting first transmission block size of protocol data unit at radio link control layer - Google Patents
Method for selecting first transmission block size of protocol data unit at radio link control layer Download PDFInfo
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Abstract
The invention discloses a method capable of choosing a transmission block size used for a protocol data unit of a wireless link control layer. A scheduling entity of a media access control layer calculates the optional transmission block size in the first transmission and judges whether the calculated transmission block size is larger than a protocol data unit size threshold. If not, then the calculated transmission block size is chosen as the transmission block size for the first transmission; if yes, then the scheduling entity judges whether to choose the transmission block size bigger than the protocol data unit size threshold according to the current distribution status of wireless resources. If yes, then the calculated transmission block size is chosen as the transmission block size for the first transmission; if not, then the transmission block size smaller than the protocol data unit size threshold is chosen as the transmission block size for the first transmission. The scheduling strategy reduces the subsection/series connection/re-subsection processing overhead of the RLCPDU first transmission and retransmission, which enhances the system performance.
Description
Technical field
The present invention relates to packet service scheduling technology in wireless communication field, a kind of method of segmentation whether heavily when relating in particular to selection and retransmitting for the first method of transport block size passing of the protocol Data Unit of wireless chain control layer and the protocol Data Unit of definite wireless chain control layer.
Background technology
In the wireless access network of third generation mobile communication long-term evolution system, HARQ entity A RQ (Automatic Repeat reQuest) is positioned at the wireless chain control layer RLC (Radio Link Control) of base station, TPDU RLC PDU (ProtocolData Unit).Mixed automatic retransfer request entity HARQ (Hybrid Automatic RepeatreQuest) is positioned at the media access control layer MAC (Media Access Control) of base station, and the protocol Data Unit MAC PDU that transmission MAC layer generates is transmission block TB (Transfer Block).RLC PDU carries out after segmentation/serial connection/corresponding rlc layer header is processed and added to (or filling) generating according to the determined transmission block TB of MAC layer scheduling result size for the service data unit RLC SDU from upper-layer protocol layer (Service Data Unit).RLC PDU is called MAC SDU after sending to MAC layer, at MAC layer, generates MAC PDU again after multiplexing/serial connection/segment processing additional corresponding MAC layer header.Wireless chain control layer and the media access control layer of the HSPA of 3-G (Generation Three mobile communication system) (High Speed PacketAccess) evolution system also may all be positioned at base station, therefore also may adopt similar scheme to generate RLC PDU and MAC PDU.
When the RLC of wireless chain control layer SDU length adds after rlc layer header overhead and MAC layer header overhead, if while being greater than the selected transmission block TB of media access control layer size, need to carry out segment processing to RLC SDU; If be less than in media access control layer selected transmission block TB size and buffering area while also having other RLC SDU, can be connected in series processing to these RLC SDU.But, if only RLC SDU is carried out to segmentation/serial connection according to transmission block TB size, also can bring certain drawback.If wireless environment is fine, the selected transmission block TB of MAC layer scheduling entity size is very large, the RLC PDU size that RLC generates according to this TB size segmentation will be very large, when media access control layer HARQ error of transmission needs the ARQ of wireless chain control layer to retransmit, may cause two kinds of consequences: (1) ARQ need to transmit larger RLC PDU while retransmitting, and has wasted Radio Resource; (2) if wireless environment variation while retransmitting, cannot transmit initial RLCPDU, need to RLC PDU, carry out heavily segmentation at rlc layer or MAC layer, increase processing expenditure and header overhead, and there is the probability of heavily segmentation while retransmitting and be greater than less RLC PDU in larger RLC PDU.And weigh the problem that cannot transmit Initial R LC PDU when fragmentation feature can only solve ARQ re-transmission, owing to still needing to transmit the full content of whole RLC PDU, so cannot solve waste of radio resources problem.
So can introduce protocol Data Unit RLC PDU size threshold in system, jointly determine that according to the selected transmission block TB of scheduling medium access control layer entity size and this default RLC PDU size threshold segmentation/serial connection of RLC SDU is processed.If the length of RLC SDU is greater than the selected transmission block TB of scheduling medium access control layer entity size after adding rlc layer header overhead and MAC layer header overhead, when transmission block TB size is less than RLC PDU threshold value, RLC SDU is carried out to segmentation according to transmission block TB size; Otherwise carry out segmentation according to RLC PDU threshold value.If the length of RLC SDU adds rlc layer header overhead and MAC layer header overhead and is less than the selected transmission block TB of scheduling medium access control layer entity size, and the RLC SDU that has other continuous sequence number in current RLC buffering area, and add when being still less than transmission block TB size and being less than RLC PDU threshold value after follow-up RLC SDU length, follow-up RLC SDU is concatenated into previous RLCSDU; If be greater than transmission block TB size or be greater than RLC PDU threshold value after adding follow-up RLC SDU length, follow-up RLC SDU is not connected in series to processing.If the RLC PDU length of above-mentioned generation is less than transmission block TB size after adding MAC layer header overhead, at media access control layer, again this RLC PDU and other RLC PDU are carried out multiplexing process or increase the transmission block that filler generates transmission block TB size, MAC layer is supported RLC PDU segmentation again.Processing expenditure and heavy fragmentation overhead in the time of can reducing like this header overhead of RLC PDU and RLCPDU and retransmit.RLC PDU threshold value can require to arrange according to the QoS (Quality ofService, service quality) of the wireless link carrying RB (Radio Bearer) of concrete business.
But, if scheduling entity is not considered RLC PDU size threshold when distributing radio resource, the probability that selected transmission block TB size is greater than RLCPDU size threshold when wireless environment is better is larger, so the probability that generates RLC PDU according to RLC PDU size threshold at rlc layer is larger, can cause like this carrying out multiplexing or increasing filler to reach TB size at MAC layer, increase MAC layer processing expenditure and header overhead.When retransmitting, if wireless environment variation, if scheduling entity is not considered the size of initial transmission piece, the probability that need to carry out heavily segmentation or at MAC layer, initial MAC PDU be carried out to heavily segmentation Initial R LC PDU at rlc layer is larger, can increase equally processing expenditure and the header overhead of heavily segmentation.
Therefore, need a kind of packet service scheduling strategy, can be used for addressing the above problem.
Summary of the invention
The method of segmentation whether heavily when main purpose of the present invention is to provide the first method of transport block size passing of protocol Data Unit of a kind of selection for wireless chain control layer and the protocol Data Unit of definite wireless chain control layer to retransmit, segmentation/serial connection/weight segment processing expense when passing and retransmitting for reducing RLC PDU head, improves systematic function.
To achieve these goals, according to a first aspect of the invention, the invention provides a kind of selection for the method for the first transport block size passing of protocol Data Unit of wireless chain control layer.Method comprises the following steps:
Step S102, optional transport block size when the scheduling entity of media access control layer is calculated first biography;
Step S104, whether the transport block size that judgement is calculated is greater than protocol Data Unit dimension threshold, if be not more than, selects the transport block size calculating as the transport block size passing for head, if be greater than, proceeds to step S106;
Step S106, scheduling entity is according to the distribution condition of current wireless resource, whether judgement selects to be greater than the transport block size of protocol Data Unit dimension threshold, if, select the transport block size calculating as the transport block size passing for head, if not, the transport block size of the transport block size of selecting to be less than protocol Data Unit dimension threshold for passing for head.
In step S106, if user has the business on other higher priority radio bearers, scheduling entity judgement is given the high-priority service on other radio bearers by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
In step S106, if there is the customer service of other higher priority to need scheduling, scheduling entity judgement is given other high-priority users business by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
In step S106, if user does not have the business on other higher priority radio bearers, but have the long period do not obtain scheduling lower priority radio bearer on business, business on the lower priority radio bearer that scheduling entity judgement does not obtain allocation of radio resources to dispatch to the long period, selection is less than the transport block size of protocol Data Unit dimension threshold.
In step S106, if the channel quality indication situation that scheduling entity is reported according to relevant user equipment knows that the channel quality of this customer service is higher than the channel quality of other customer services, selection be less than protocol Data Unit dimension threshold transport block size and allocation of radio resources give other customer service can cause wireless resource utility efficiency low, reduce entire system throughput and performance, judgement does not force to select to be less than the transport block size of protocol Data Unit threshold size.
To achieve these goals, according to a second aspect of the invention, the method for segmentation whether heavily when the protocol Data Unit that the invention provides a kind of definite wireless chain control layer retransmits.Method comprises the following steps:
Step S202, the scheduling entity of media access control layer is calculated optional transport block size while retransmitting;
Step S204, protocol Data Unit size when whether the transport block size that judgement is calculated is greater than first biography, if be greater than, selects the transport block size calculating as the transport block size for retransmitting, if be not more than, proceeds to step S206;
Step S206, scheduling entity can be used for the Radio Resource retransmitting according to the distribution condition adjustment of current wireless resource, if protocol Data Unit size when the Radio Resource of adjusting does not meet first biography, heavily segmentation is carried out in judgement.
Alternatively, in step S206, adjust to be included as to retransmit and distribute how continuous or discrete subcarrier, to obtain frequency diversity gain.
Alternatively, in step S206, adjust to be included as to retransmit and distribute the Transmission Time Interval number that transmission was used more than last time, with acquisition time diversity gain.
Alternatively, in step S206, adjust when being included in protocol Data Unit and being the insensitive non-real-time service of time delay, postpone its scheduling, in several Transmission Time Intervals, when assignable Radio Resource can meet, dispatches again in the back.
Alternatively, in step S206, adjust and comprise the priority that improves re-transmission, to obtain the more resource than other lower-priority subscribers.
To achieve these goals, according to a third aspect of the invention we, the invention provides a kind of selection for the method for the first transport block size passing of protocol Data Unit of wireless chain control layer.Optional transport block size when the scheduling entity of media access control layer is calculated first biography: according to the distribution condition of current wireless resource, whether judgement selects to be less than the transport block size of protocol Data Unit dimension threshold.
If user has the business on other higher priority radio bearers, scheduling entity judgement is given the high-priority service on other radio bearers by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
If there is the customer service of other higher priority to need scheduling, scheduling entity judgement is given other high-priority users business by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
If user does not have the business on other higher priority radio bearers, but have the long period do not obtain scheduling lower priority radio bearer on business, business on the lower priority radio bearer that scheduling entity judgement does not obtain allocation of radio resources to dispatch to the long period, selection is less than the transport block size of protocol Data Unit dimension threshold.
If the channel quality indication situation that scheduling entity is reported according to relevant user equipment knows that the channel quality of this customer service is higher than the channel quality of other customer services, selection be less than protocol Data Unit dimension threshold transport block size and allocation of radio resources give other customer service can cause wireless resource utility efficiency low, reduce entire system throughput and performance, judgement does not force to select to be less than the transport block size of protocol Data Unit threshold size.
To achieve these goals, according to a forth aspect of the invention, the method for segmentation whether heavily when the protocol Data Unit that the invention provides a kind of definite wireless chain control layer retransmits.The scheduling entity of media access control layer is calculated optional transport block size while retransmitting: scheduling entity determines whether to select to be more than or equal to the transport block size of protocol Data Unit initial value according to corresponding wireless regulation strategy, wherein protocol Data Unit initial value equals transport block size after adding media access control layer header overhead, if protocol Data Unit size when the Radio Resource of adjusting does not meet first biography, heavily segmentation is carried out in judgement.
Alternatively, adjust to be included as to retransmit and distribute how continuous or discrete subcarrier, to obtain frequency diversity gain.
Alternatively, adjust to be included as to retransmit and distribute the Transmission Time Interval number that transmission was used more than last time, with acquisition time diversity gain.
Alternatively, adjust when being included in protocol Data Unit and being the insensitive non-real-time service of time delay, postpone its scheduling, in several Transmission Time Intervals, when assignable Radio Resource can meet, dispatches again in the back.
Alternatively, adjust and comprise the priority that improves re-transmission, to obtain the more resource than other lower-priority subscribers.
By technique scheme, scheduling strategy disclosed by the invention has reduced segmentation/serial connection/weight segment processing expense when RLC PDU is first to be passed and retransmit, and has improved systematic function.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is that selection according to the present invention is for the flow chart of the method for the first transport block size passing of protocol Data Unit of wireless chain control layer;
Whether heavily Fig. 2 is the flow chart of the method for segmentation while retransmitting according to the protocol Data Unit of definite wireless chain control layer of the present invention;
Fig. 3 is according to the schematic diagram of the system configuration of the embodiment of the present invention;
Fig. 4 is the process chart according to first embodiment of the invention; And
Fig. 5 is the process chart according to second embodiment of the invention.
Embodiment
Describe below with reference to the accompanying drawings the present invention in detail.
With reference to Fig. 1, the method according to selection of the present invention for the first transport block size passing of protocol Data Unit of wireless chain control layer comprises the following steps:
Step S102, optional transport block size when the scheduling entity of media access control layer is calculated first biography;
Step S104, whether the transport block size that judgement is calculated is greater than protocol Data Unit dimension threshold, if be not more than, selects the transport block size calculating as the transport block size passing for head, if be greater than, proceeds to step S106;
Step S106, scheduling entity is according to the distribution condition of current wireless resource, whether judgement selects to be greater than the transport block size of protocol Data Unit dimension threshold, if, select the transport block size calculating as the transport block size passing for head, if not, the transport block size of the transport block size of selecting to be less than protocol Data Unit dimension threshold for passing for head.
In step S106, if user has the business on other higher priority radio bearers, scheduling entity judgement is given the high-priority service on other radio bearers by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
In step S106, if there is the customer service of other higher priority to need scheduling, scheduling entity judgement is given other high-priority users business by allocation of radio resources, selects to be less than the transport block size of protocol Data Unit dimension threshold.
In step S106, if user does not have the business on other higher priority radio bearers, but have the long period do not obtain scheduling lower priority radio bearer on business, business on the lower priority radio bearer that scheduling entity judgement does not obtain allocation of radio resources to dispatch to the long period, selection is less than the transport block size of protocol Data Unit dimension threshold.
Alternatively, in step S106, if the channel quality indication situation that scheduling entity is reported according to relevant user equipment knows that the channel quality of this customer service is higher than the channel quality of other customer services, selection be less than protocol Data Unit dimension threshold transport block size and allocation of radio resources give other customer service can cause wireless resource utility efficiency low, reduce entire system throughput and performance, judgement does not force to select to be less than the transport block size of protocol Data Unit threshold size.
With reference to Fig. 2, while retransmitting according to the protocol Data Unit of definite wireless chain control layer of the present invention, heavily whether the method for segmentation comprises the following steps:
Step S202, the scheduling entity of media access control layer is calculated optional transport block size while retransmitting;
Step S204, protocol Data Unit size when whether the transport block size that judgement is calculated is greater than first biography, if be greater than, selects the transport block size calculating as the transport block size for retransmitting, if be not more than, proceeds to step S206;
Step S206, scheduling entity can be used for the Radio Resource retransmitting according to the distribution condition adjustment of current wireless resource, if protocol Data Unit size when the Radio Resource of adjusting does not meet first biography, heavily segmentation is carried out in judgement.
Alternatively, in step S206, adjust to be included as to retransmit and distribute how continuous or discrete subcarrier, to obtain frequency diversity gain.
Alternatively, in step S206, adjust to be included as to retransmit and distribute the Transmission Time Interval number that transmission was used more than last time, with acquisition time diversity gain.
Alternatively, in step S206, adjust when being included in protocol Data Unit and being the insensitive non-real-time service of time delay, postpone its scheduling, in several Transmission Time Intervals, when assignable Radio Resource can meet, dispatches again in the back.
Alternatively, in step S206, adjust and comprise the priority that improves re-transmission, to obtain the more resource than other lower-priority subscribers.
The present invention relates to digital mobile communication technical field, particularly packet service scheduling method in wireless communication system.
The factor of existing dispatching algorithm distributing radio resource time institute foundation mainly comprises that quality QoS demand, measurement report, buffer state, still untreated re-transmission, channel quality indicator (CQI) (Channel Quality Indicator), UE ability, UE dormancy period and measurement clearance, system parameters are as bandwidth/interference rank or jamming pattern etc.Scheduling strategy of the present invention has increased RLC PDU is first while passing using RLC PDU size threshold as a kind of Consideration wherein, when RLC PDU retransmits using initial transmission piece TB size as a kind of Consideration wherein.
Main contents of the present invention are:
1. while utilizing scheduling entity to determine the first biography of RLC PDU, whether need selection to be greater than the method for the transmission block TB size of RLCPDU threshold value.
2. utilize scheduling entity to determine whether RLC PDU needs the method for heavily segmentation while retransmitting.
Treatment step of the present invention is:
Step 1: whether need selection to be greater than the method for the transmission block TB size of RLC PDU threshold value while utilizing scheduling entity to determine the first biography of RLC PDU.Scheduling divides timing using RLC PDU size threshold as one of scheduling decision factor with resource, the RLCPDU passing for head, scheduling entity selects to be less than the transmission block TB size of RLC PDU size threshold according to certain strategy and algorithm in the scope that can regulate as far as possible, thereby avoid carrying out multiplexing or increasing the overhead that filler is brought to reach TB size at MAC layer, adjustable range refers to that scheduling adjustment expense is less than the scope when MAC layer carries out multiplexing or increase filler expense.
Further, when the first biography of RLC PDU, radio condition is better, when scheduling medium access control layer entity can be greater than the transmission block TB size of RLCPDU size threshold for the service selection on this user's present wireless bearing RB, scheduling entity can adopt strategy adjustment below to distribute to the Radio Resource of the first RLC PDU passing:
1) if this user has the business on other higher priority radio bearer RB, or the customer service that has other higher priority needs scheduling, allocation of radio resources can be given to the high-priority service on other RB of this user or distributed to other high-priority users, thereby be less than the transmission block TB size of RLC PDU size threshold to service selection on current RB;
2) if this user without the business on other higher priority RB, also can resource distribute to this user long period do not obtain scheduling lower priority RB on business.
While adopting said method, the channel quality indicator (CQI) situation of reporting according to relevant user equipment, scheduling entity need to be avoided allocation of radio resources to the very poor user of channel quality.When this user's channel quality fine, and the channel quality of other high-priority users is poor, if select to be less than RLC PDU threshold value size transmission block TB size and allocation of radio resources to other user can cause wireless resource utility efficiency low, reduce in the situation of entire system throughput and performance, be the suitable transmission block TB size of service selection on this RB of this user, do not force to select to be less than the transmission block TB size of RLC PDU threshold value size.
Step 2: utilize scheduling entity to determine whether RLC PDU needs the method for heavily segmentation while retransmitting.Scheduling divides timing using the initial length of the RLC PDU of need re-transmission as one of scheduling decision factor with resource, the RLC PDU retransmitting for needs, scheduling entity meets Radio Resource required while retransmitting in the scope that can regulate as far as possible according to certain strategy and algorithm, thereby avoid rlc layer to RLC PDU heavily segmentation or at MAC layer to the MAC PDU overhead that heavily segmentation brings, scope when adjustable range refers to that scheduling adjustment expense is less than heavy fragmentation overhead.
Further, when retransmitting RLC PDU, radio condition is poor, and when scheduling medium access control layer entity possibly cannot be selected initial transmission piece TB size, scheduling entity can adopt strategy adjustment below to distribute to the Radio Resource of retransmitted RLC PDU:
1) the channel quality indicator (CQI) situation of reporting according to relevant user equipment UE, can distribute how continuous or discrete subcarrier for this RLC PDU, to obtain frequency diversity gain; But need to avoid in the situation that channel quality is very poor as it distributes more subcarrier, this can reduce the good user's of other channel quality performance, thereby reduce overall system performance;
2), while adopting asynchronous HARQ, can distribute TTI (Transmission Time Interval, the Transmission Time Interval) number that transmission was used more than last time for this RLC PDU, with acquisition time diversity gain; But need to avoid in the situation that channel quality is very poor as it distributes more TTI, this can reduce the good user's of other channel quality performance, thereby reduce overall system performance;
3) if this RLC PDU belongs to the insensitive non-real-time service of time delay, can under the service quality QoS condition allowing, postpone its scheduling, in several TTI, when can meeting, dispatches again assignable Radio Resource in the back;
4) improve the priority of the RLC PDU of required re-transmission, thereby can obtain the more resource than other lower-priority subscriber.
If all adjusting factors that scheduling entity can be utilized in adjustable extent all cannot meet while retransmitting the required Radio Resource of this RLC PDU, it is weighed to segment processing; The channel quality conditions that for example relevant user equipment is reported is very poor, if utilize by force scheduling to meet, retransmits resource requirement, may cause retransmitting unsuccessfully, and reduce power system capacity and throughput, may reduce largely systematic function.
Fig. 1 illustrates the system configuration that comprises the entity relevant with the present invention, and base station user face protocol stack comprises physical layer, media access control layer, wireless chain control layer.Wherein ARQ entity is positioned at wireless chain control layer, and scheduling entity and HARQ entity are positioned at media access control layer.
Fig. 2 illustrates the first embodiment of the present invention.
Step 10:MAC layer scheduling entity is according to set dispatching algorithm primary Calculation transmission block TB size;
Step 20: transmission block TB size > RLC PDU length threshold value? if be not more than, go to step 30; If be greater than, go to step 40;
The judgement of step 30:MAC layer scheduling entity does not need corrected Calculation result, using transmission block TB size notice rlc layer as the foundation to RLC SDU segmentation/serial connection; Go to step 60;
Step 40: thus according to set strategy, judge whether to give the business on other RB of this user allocation of radio resources or distribute to other user to be less than the transmission block TB size of RLC PDU size threshold for the service selection on current RB? if not, go to step 30; If so, go to step 50;
Step 50: scheduling entity is adjusted allocation of radio resources, recalculates transmission block TB size, selects to be less than the transmission block TB size of RLC PDU length threshold value; Go to step 30;
Is step 60:RLC layer ARQ entity received the message of RLC PDU bust this? if not, go to step 10; If so, go to step 70;
Step 70: need to retransmit this RLC PDU, MAC layer scheduling entity calculated the transmission block TB size that can select while retransmitting; Go to step 80;
Step 80: the RLC PDU size of transmission block TB size < initial transmission? if be not less than, go to step 30; If be less than, go to step 90; Illustrate, in the situation that being not less than, the RLC PDU of this re-transmission sends to MAC layer and is called MAC SDU, can be multiplexing at MAC layer and other MAC SDU;
Step 90: according to set strategy, judge whether to adjust allocation of radio resources, with selection, meet the transmission block TB size of Initial R LC PDU size to the more Radio Resource of traffic assignments on current RB? if not, go to step 30; If so, go to step 100;
Step 100: scheduling entity is adjusted allocation of radio resources, recalculates transmission block TB size, selects to equal the transmission block TB size of Initial R LC PDU length; Go to step 30.
Fig. 3 illustrates the second embodiment of the present invention.In which, scheduling entity does not need the process through correction algorithm.The RLC PDU passing for head, according to corresponding factor, whether direct decision selects to be less than the TB size of RLC PDU threshold value; According to corresponding factor, for the RLC PDU retransmitting, directly determine it is to retransmit initial RLC PDU or heavily segmentation.
Step 10:MAC layer scheduling entity calculated transmission block TB size according to set dispatching algorithm: by RLC PDU threshold value, one of be input parameter, MAC scheduling entity determines whether to select to be less than the TB size of corresponding RLC PDU threshold value according to corresponding wireless regulation strategy; Go to step 20;
Step 20:MAC layer scheduling entity is using transmission block TB size notice rlc layer as the foundation to RLC SDU segmentation/serial connection; Go to step 30;
Is step 30:RLC layer ARQ entity received the message of RLC PDU bust this? if not, go to step 10; If so, go to step 40;
Step 40: the RLC PDU that this need to retransmit is scheduled, the transmission block TB size that can select when MAC layer scheduling entity calculate to retransmit: when head is passed, RLC PDU initial value one of is input parameter, and MAC scheduling entity determines whether can select to equal the TB size (RLC PDU initial value equals TB size after adding MAC layer header overhead) of RLC PDU initial value according to corresponding wireless regulation strategy; Go to step 50;
Step 50:MAC layer scheduling entity is using transmission block TB size notice rlc layer as the foundation to RLC SDU segmentation/serial connection; Go to step 10.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. selection, for a method for the first transport block size passing of protocol Data Unit of wireless chain control layer, is characterized in that, comprises the following steps:
Step S102, optional transport block size when the scheduling entity of media access control layer is calculated first biography;
Step S104, whether the transport block size that judgement is calculated is greater than protocol Data Unit dimension threshold, if be not more than, selects the transport block size calculating as the transport block size passing for head, if be greater than, proceeds to step S106;
Step S106, described scheduling entity is according to the distribution condition of current wireless resource, whether judgement selects to be greater than the transport block size of described protocol Data Unit dimension threshold, if, select the transport block size calculating as the transport block size passing for head, if not, the transport block size of the transport block size of selecting to be less than described protocol Data Unit dimension threshold for passing for head;
Wherein, in step S106:
If user has the business on other higher priority radio bearers, described scheduling entity judgement is given the high-priority service on other radio bearers by allocation of radio resources, selects to be less than the transport block size of described protocol Data Unit dimension threshold; And/or
If there is the customer service of other higher priority to need scheduling, described scheduling entity judgement is given other high-priority users business by allocation of radio resources, selects to be less than the transport block size of described protocol Data Unit dimension threshold; And/or
If user does not have the business on other higher priority radio bearers, but have the long period do not obtain scheduling lower priority radio bearer on business, business on the lower priority radio bearer that described scheduling entity judgement does not obtain allocation of radio resources to dispatch to the long period, selection is less than the transport block size of described protocol Data Unit dimension threshold; And/or
If the channel quality indication situation that described scheduling entity is reported according to relevant user equipment knows that the channel quality of this customer service is higher than the channel quality of other customer services, selection be less than described protocol Data Unit dimension threshold transport block size and allocation of radio resources give other customer service can cause wireless resource utility efficiency low, reduce entire system throughput and performance, judgement does not force to select to be less than the transport block size of described protocol Data Unit threshold size.
2. selection, for a method for the first transport block size passing of protocol Data Unit of wireless chain control layer, is characterized in that:
Optional transport block size when the scheduling entity of media access control layer is calculated first biography: according to the distribution condition of current wireless resource, whether judgement selects to be less than the described transport block size of described protocol Data Unit dimension threshold;
Wherein, if user has the business on other higher priority radio bearers, described scheduling entity judgement is given the high-priority service on other radio bearers by allocation of radio resources, selects to be less than the transport block size of described protocol Data Unit dimension threshold; And/or
If there is the customer service of other higher priority to need scheduling, described scheduling entity judgement is given other high-priority users business by allocation of radio resources, selects to be less than the transport block size of described protocol Data Unit dimension threshold; And/or
If user does not have the business on other higher priority radio bearers, but have the long period do not obtain scheduling lower priority radio bearer on business, business on the lower priority radio bearer that described scheduling entity judgement does not obtain allocation of radio resources to dispatch to the long period, selection is less than the transport block size of described protocol Data Unit dimension threshold; And/or
If the channel quality indication situation that described scheduling entity is reported according to relevant user equipment knows that the channel quality of this customer service is higher than the channel quality of other customer services, selection be less than described protocol Data Unit dimension threshold transport block size and allocation of radio resources give other customer service can cause wireless resource utility efficiency low, reduce entire system throughput and performance, judgement does not force to select to be less than the transport block size of described protocol Data Unit threshold size.
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| US8964639B2 (en) * | 2008-11-24 | 2015-02-24 | Telefonaktiebolaget L M Ericsson (Publ) | Uplink segmentation |
| CN102378253B (en) * | 2010-08-16 | 2015-12-02 | 中国移动通信集团公司 | A kind of method and apparatus determining transmission block size |
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