CN101682916A - Method for sending rlc pdu and allocating radio resource in mobile communications system and rlc entity of mobile communications - Google Patents
Method for sending rlc pdu and allocating radio resource in mobile communications system and rlc entity of mobile communications Download PDFInfo
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Abstract
Disclosed is a transmission of a RLC STATUS PDU using a limited radio resource by MAC and RLC layers in a long term evolution (LTE) system. In case where the MAC entity prioritizes logical channels for allocating the radio resource to each logical channel, the MAC entity is allowed to allocate radio resources based upon the size of a RLC STATUS PDU to be sent from the RLC layer and also the RLC layer is allowed to use the STATUS PDU prior to RLC data PDUs upon using the allocated radio resource, such that RLC protocols can be avoided from coming in a deadlock situation due to a non-transmission of the STATUS PDU.
Description
The cross reference of related application
[0001] the application requires the U.S. Provisional Application No.61/025 respectively on February 1st, 2008 and submission on February 4th, 2008,311 and No.61/026,119 and the interests of the priority of the korean patent application No.10-2009-0007152 that submits in Korea S on January 29th, 2009.Mode by reference is completely integrated the whole contents of these applications in this.
Technical field
[0002] the present invention relates to a kind of wireless protocols in mobile communication system, and more specifically, the MAC and the rlc layer that relate in a kind of Long Term Evolution (LTE) system use limited Radio Resource to send the method for RLC STATUS PDU (RLC status PDU).
Background technology
[0003] Fig. 1 is the network architecture of Long Term Evolution (LTE) system, and the LTE system is from existing UMTS system evolved and the mobile communication system of next correlation technique, and its basic standardization is carried out in 3GPP.
[0004] the LTE network can be divided into evolution UMTS grounding wireless access network network (E-UTRAN) and core network (CN).E-UMTS comprises terminal (subscriber equipment; UE), base station (enode b; ENB), be positioned at the IAD (aGW) of the end of the network that will be connected to external network.AGW can be divided into the part of process user business and the part of processing controls business.Here, can use new interface to carry out and be used for communication between the aGW of processing controls business at the aGW that is used for the process user business.One or more sub-districts may reside among the eNB.The interface that is used to transmit customer service or control business can use between eNB.CN can comprise aGW, be used for the node etc. of user's registration of other UE.Interface can be used to discern E-UTRAN and CN.
[0005] Fig. 2 is based on the framework of the Radio interface protocols control plane of 3GPP Radio Access Network standard between terminal and E-UTRAN, and Fig. 3 is based on the framework of the Radio interface protocols user plane of 3GPP Radio Access Network standard between terminal and E-UTRAN.
[0006] hereinafter, will be described in the framework of the Radio interface protocols between terminal and the E-UTRAN with reference to figure 2 and 3.
[0007] Radio interface protocols has level course and has vertical plane, this level course comprises physical layer, data link layer and network layer, and this vertical plane comprises the user plane that is used for data information and is used to transmit the control plane of controlling signaling.Can these protocol layers be divided into ground floor (L1), the second layer (L2) and the 3rd layer (L3) based on three lower levels of known open system interconnection (osi) master pattern in communication system.Such Radio interface protocols can exist between terminal and E-UTRAN in pairs, with the transfer of data of management by interface.
[0008] hereinafter, with the wireless protocols control plane among description Fig. 2 and each layer in the radio protocol user plane among Fig. 3.
[0009] ground floor as physics (PHY) layer uses physical channel to provide formation transfer service to the upper strata.Physical layer is connected to its upper strata that is called as medium access control (MAC) layer via transmission channel.MAC layer and physical layer are via the transmission channel swap data.Here, can whether be shared according to transmission channel transmission channel is divided into dedicated transmission channel and Common transport channel.Between different physical layers, promptly between the physical layer and physical layer that transmit side, transmit data via physical channel at receiver side.
[0010] various layers are present in the second layer.At first, medium access control (MAC) layer is used for the Different Logic channel Mapping is arrived different transmission channels, and logical channels is multiplexing some logic channels are mapped to a transmission channel.The MAC layer is connected to upper strata Radio Link control (RLC) layer via logic channel.Type according to the information that will transmit is divided into logic channel the Traffic Channel that is used to transmit the control channel of control plane information and is used to transmit user plane information.
[0011] rlc layer of the second layer is managed the segmentation and the cascade of the data that receive from the upper strata, suitably to regulate size of data, makes lower level to send data by interface.And in order to ensure various service quality (QoS) requirement of each radio bearer (RB), rlc layer provides three kinds of operator schemes, comprises transparent mode (TM), dont answer pattern (UM) and answer-mode (AM).Especially, automatic repetition and request (ARQ) function that is used for the authentic data transmission with the rlc layer (hereinafter, being called as " AM rlc layer ") of AM pattern operation carried out re-transmission.
[0012] PDCP (PDCP) layer that is positioned at the second layer is used for transmitting IP grouping such as IPv4 or IPv6 effectively with relatively little bandwidth on wave point.For this reason, the PDCP layer reduces on the size big relatively and comprise the size of the IP packet header of unnecessary control information,, carries out the function that is called as header-compressed that is.Therefore, can only comprise necessary information, so that improve the transmission efficiency of wave point at the header portion of the data that are used for transmitting.
[0013] Radio Resource control (RRC) layer that is arranged in the 3rd layer lowest portion only is defined within control plane.The configuration of rrc layer control and radio bearer (RB), reconfigure and discharge relevant logic channel, transmission channel and physical channel.Here, RB represents to be provided for by the L2 layer logical path of the transfer of data between terminal and UTRAN.Usually, the foundation of RB refers to characteristic and setting detail parameters and the method for operation separately that regulation provides needed protocol layer of special services and channel.RB is divided into signaling RB (SRB) and data RB (DRB).SRB is used as the path that is used for transmitting on the C plane RRC message, and DRB is used as the path that is used for transmitting on the U plane user data.
[0014] hereinafter, rlc layer will be described in more detail.As mentioned above, rlc layer provides three kinds of patterns, such as TM, UM and AM.Rlc layer is seldom carried out function with TM, and therefore will only describe UM and AM at this.UM RLC adds protocol Data Unit (PDU) header that comprises sequence number (SN) to each PDU that is used to transmit, and makes receiver side to learn and lost which PDU during transmitting.Because such function, in user plane, UMRLC management is such as in the packet service territory (hereinafter, be also referred to as the PS territory) in voice (for example, VoIP) or the transmission of the multi-medium data that send of stream or the transmission of real time packet data, and in control plane, do not need to receive the transmission of the RRC message of replying in the middle of the RRC message of the particular terminal of management in being sent to the sub-district or specific group of terminals.
[0015] similarly, AM RLC comprises that by interpolation the PDU header of SN constructs PDU at structure during PDU.Different with UM RLC, receiver side is to being replied by the PDU that transmits the side transmission.Receiver side is replied so that ask and is stressed to pass the PDU that does not successfully receive from transmission.Such functions of retransmission is the most important characteristic of AM RLC.Therefore, AM RLC is intended to guarantee that via re-transmission faultless data transmit.Under this purpose, AM RLC usually in user plane management non real-time grouped data transmit, such as the TCP/IP in PS territory, and in control plane, need to receive the transmission of the RRC message of replying in the middle of the RRC message of the particular terminal of management in being sent to the sub-district.
[0016] from the visual angle of direction, UM RLC is used for one-way communication, and AM RLC is owing to the feedback from receiver side is used for two-way communication.Visual angle from structure there are differences, that is, UM RLC is configured to make a RLC entity to carry out transmission or reception, and AMRLC is configured to make that transmission side and receiver side are present in the RLC entity.The complex configurations of AMRLC is owing to retransmit.AM RLC comprises the re-transmission buffer that is used to manage re-transmission except transmission/reception buffer.And, AM RLC carries out various functions, such as use to transmit and receive window carry out current control, poll transmit side with from the receiver side requesting state information of RLC entity, to the status report of the transmission side transmission receiver side of reciprocity RLC entity with the buffer state of reporting it, the status PDU that is configured to sending state information, or the like.AM RLC also needs the variety of protocol parameter, such as state variable and timer, so that support these functions.Be used for being controlled at the PDU (such as status report or status PDU) that the data of AM RLC transmit and be called as " control PDU ", and the PDU that is used to transmit user data is called as " data PDU ".
[0017] the RLC data PDU in AM RLC at length can be divided into AMD PDU and AMD PDU segmentation.AMD PDU segmentation has a part that is included in the data among the AMD PDU.In the LTE system, when terminal sends data block, can change the largest amount of data block.Therefore, transmitting side AM RLC entity after special time has been constructed 200 byte AMD PDU and transmitted the AMD PDU that is constructed, receive NACK and when attempting retransmitting this AMDPDU thus when transmitting side AM RLC from receiver side AM RLC, if the largest amount of actual transmissible data block is 100 bytes, then can't former state send identical AMD PDU.In this case, use AMD PDU segmentation.The AMDPDU segmentation is represented corresponding AMD PDU is segmented into littler unit.During this process, transmit side AM RLC entity AMD PDU is divided into AMD PDU segmentation and transmits AMD PDU segmentation on several delivery times intervals.Then, receiver side AM RLC entity recovers AMD PDU from received AMD PDU segmentation.
[0018] if the data that exist not successfully (not fully or not correctly) to receive, then receiver side AM RLC request retransmits such data from transmitting side AM RLC, this is called as " status report ".By using status PDU to send this status report as one of control PDU.
[0019] Fig. 4 is the form of the status PDU of current use in the LTE system.In Fig. 4, the length of RLC status PDU of (that is 1 eight hyte) that trunnion axis represents to have 8.
[0020] each field of RLC status PDU will be described now.
[0021] 1. data/control (D/C) field: 1
[0022] to indicate corresponding RLC PDU be RLC data PDU or RLC control PDU to this field.
[0023] 2. controls PDU type (CPT) field: 3
[0024] this field indication control corresponding PDU is any type.The current status PDU that only defined of RLC control PDU.
[0025] 3. response sequence number (ACK_SN)
[0026] two type ACK_SN will be defined as follows.
[0027] 1-1) ACK_SN of category-A type is the RLC SN that does not comprise a PDU of its information in status PDU.
[0028] 1-2) in case receives status PDU, transmit side and just determine that receiver side has successfully received at all PDU in the middle of the PDU of the PDU with ACK_SN-1, except the part of the PDU that indicates in the PDU that in having the status PDU of NAC_SN, indicates or the status PDU with NACK_SN, SOstart and SOend.
[0029] such ACK_SN is applied to embodiment according to Fig. 6 of the present invention and 8.
[0030] 2-1) ACK_SN of another type is the RLC SN that comprises a PDU of its information in status PDU.
[0031] 2-2) in case receives status PDU, transmit side and just determine that receiver side has successfully received at all PDU in the middle of the PDU of the PDU with ACK_SN, except the part of the PDU that indicates in the PDU that in having the status PDU of NACK_SN, indicates or the status PDU with NACK_SN, SOstart and SOend.
[0032] such ACK_SN is applied to embodiment according to Fig. 7 of the present invention and 9.
[0033] 4. expands 1 (E1): 1
[0034] this indication whether exist in current NACK_SN element back other NACK_SN element (that is, utilize NACK_SN or utilize NACK_SN, SOstart and SOend indicated).
[0035] 5.NACK_SN (negative response sequence number)
[0036] this is the AMD PDU that successfully do not receive or the RLCSN of AMD PDU segmentation.
[0037] 5. expands 2 (E2): 1
[0038] this indicates whether to exist and corresponding SOstart of current NACK_SN and SOend field.
[0039] 6. grading excursion begins (SOstart) and grading excursion end (SOend)
[0040] only just uses these when being NACK when the part (segmentation) of the PDU with NACK_SN.First byte of this part is corresponding with SOstart and last byte and SOend this part are corresponding.
[0041] simultaneously, receiver side AM RLC can't always trigger status PDU, but can only just trigger status report when satisfying specified conditions.Such condition is called as " status report triggering ", and following two conditions of the current use of LTE system.
[0042] first condition is that poll transmits side.
[0043] that is to say,, transmit side AMRLC and poll bit is set for the RLC data PDU that is used to transmit when needs during from the receiver side receiving state report.Then, in a single day receiver side AM RLC receives poll bit the RLC data PDU is set, and just triggers status report.
[0044] second condition is to detect the RLC data PDU that not success receives.
That is to say that [0045] finish after HARQ reorders, in case detect the RLC data PDU (that is, AMD PDU or AMD PDU segmentation) that does not successfully receive, receiver side AM RLC just triggers status report.
[0046] in addition, when triggering status report, receiver side AM RLC user mode PDU sends the reception buffer state to transmitting side.Here, status PDU is included in PDU (=VR (R)) from the starting point with receive window to the HARQ information of PDU (=VR (MS)) to the last that reorders in the middle of the PDU in the scope of the PDU that finishes.Here, VR (R) and VR (MS) expression state variable, they can be managed and be used for receive window, status report etc. by receiver side AM RLC.Inter alia, receiver side AM RLC management additivity variable.
[0047] such additivity variable of receiver side AM RLC is described as follows.
[0048]-and VR (R): the accepting state variable.
[0049] it remains on the value of the sequence number (SN) of the AMD PDU after the last AMD PDU in the middle of the AMD PDU that receives of order.
[0050] it is the AMD PDU in the middle of receiver side AM RLC does not have fully AMD PDU that (or successfully) receive.
[0051] it is as the lower limb of receive window.
[0052] it is initially set to 0.When fully receiving the have SN=VR AMD PDU of (R), it is updated to the value of the SN of first AMDPDU that does not receive fully after AMD PDU.
[0053]-and VR (MR): maximum can be accepted the accepting state variable.
[0054] it remains on the value of the SN of the AMDPDU in the middle of the AMD PDU outside the receive window.
[0055] it is as the top edge of receive window.
[0056] when upgrading VR (R), it is updated to for example VR (MR)=VR (R)+AM_Window_size.
[0057]-and VR (X): the T_reordering state variable
[0058] it remains on the value that triggers as the SN of the RLC data PDU after the RLC data PDU of the T_reordering that is used to manage the timer that HARQ reorders.
[0059] receiver side AM RLC just drives T_reordering in case receive out-of-sequence RLC data PDU under the condition that does not trigger T_reordering, and VR (X) is arranged in the value of the SN of RLC data PDU RLC data PDU afterwards.
[0060]-and VR (MS): maximum rating delivery status variable
[0061] this state variable is used for only relevant with having finished RLC data PDU that HARQ reorders information is included in status PDU.
[0062] in a single day it is initially set to 0, and fully receives the AMD PDU with SN=VR (MS), just it is updated to the value of the SN of the AMD PDU that does not fully receive in first of AMD PDU back.
[0063] in case-T_reordering expires, and then it is updated to the value of the SN of the first AMD PDU that does not fully receive in the middle of the AMD PDU higher than VR (X).ACK_SN is arranged to VR (MS) so that structural regime PDU.
[0064]-and VR (H): the highest state variable that receives
[0065] it remains on the value of the just in time next SN of the highest SN in the middle of the RLC data PDU that receiver side AM RLC receives, that is, and and the value of the SN of the RLC data PDU that receiver side AM RLC first does not successfully receive.
[0066] in a single day it is initially set to 0, and receives the RLC data PDU higher than VR (H), just it is updated to the value of the SN of the RLC data PDU after the RLC data PDU.
[0067] hereinafter, will the bgical channel priority sequence arrangement of being carried out by the MAC layer (LCP) be described.
[0068] when several radio bearers (RB) are re-used and transmit on a transmission channel, configuration LTE terminal makes its MAC layer be identified for the amount of the transmission data of each RB based on following rule with respect to given Radio Resource for each delivery time interval (TTI).
[0069] the 1.MAC layer is identified for the amount with the transmission data of the multiplexing RB of the descending of each priority of logical channels (LCP), and the as many conveying capacity of the corresponding data of Maximum Bit Rate (PBR) by prioritizing definite then and each RB.
[0070] if 2. remain any Radio Resource, then the MAC layer is identified for the amount with the transmission data of the multiplexing RB of the descending of each LCP.
[0071] here, current 1 to 8 LCP has been discussed, and 1 expression limit priority, and 8 expression lowest priorities.PBR represents to guarantee to be used for the minimal bit rate of corresponding RB, this means the LTE system even also can support the bit rate of such degree under the wireless environment of no good cake.PBR can be set at 0 to the unlimited scope.
[0072] simultaneously, in case initial setting up RB, then the LCP of each RB and PBR are set up message via RB and send to terminal RRC from network RRC.Receiving after RB sets up message, terminal RRC is provided with necessary RB and will sends to terminal MAC about the LCP of each RB and the information of PBR then.The MAC that has received such information is identified for the conveying capacity of each RB with respect to the given Radio Resource of each TTI based on such rule.
Summary of the invention
Technical scheme
[0073] when logical channels prioritizing (LCP), MAC only considers LCP and PBR.Therefore, for particular logical channel, possible is, institute's assigned radio resource may be less than the RLC status PDU that will send via corresponding logic channel.Yet, when triggering status report, allow receiver side AM RLC that all information relevant with the AMD PDU in preset range are included in the status PDU that is used for transmitting.Therefore, if the Radio Resource that is used for transmit status PDU less than status PDU, then can't send the status PDU of being constructed.Correlation technique is not considered such situation.As a result, such situation takes place, and just can't send the RLC status PDU of being constructed, thereby cause deadlock situation.
[0074] therefore, the objective of the invention is, in MAC layer logical channels prioritizing so that under the situation of each logical channel assignment Radio Resource, allow MAC layer (MAC entity) to come distributing radio resource based on the size of the RLC status PDU that will send from rlc layer, and allow rlc layer when using institute's assigned radio resource before the RLC data PDU user mode PDU, can prevent that thus rlc protocol is owing to successfully not transmitting of status PDU enters deadlock.For this reason, the present invention has proposed the operation of MAC and the operation of RLC respectively.
[0075] in order to solve the problem of correlation technique, a kind of method that is used for transmitting in mobile communication system Radio Link control (RLC) protocol Data Unit (PDU) comprises: receive the indication of available resources from medium access control (MAC) entity; The indication of using described available resources is by the transmission of prioritizing RLC control PDU with respect to the RLC data PDU; And use received available resources to transmit described RLC PDU by prioritizing.
[0076] this method may further include to RLC control PDU and distributes described available resources, and if remained any resource, then described residual resource is assigned to described RLC data PDU.
[0077] RLC control PDU can represent the RLC status PDU, and this method may further include: if from the described available resources of described MAC entity indication size less than a status PDU, and the then described RLC entity of transmission can skip a described status PDU by to(for) this conveyer.
[0078] can check described available resources and a described status PDU for each delivery time interval (TTI).
[0079] RLC control PDU can represent the RLC status PDU, and this method may further include, for each delivery time at interval (TTI) check that by the RLC entity whether having dispatched status PDU is used for transmitting, and if then notify the size of described status PDU to described MAC entity.
[0080] in one aspect of the invention, a kind of method that is used for dividing the resource that is used in transmission in mobile communication system, can comprise: distributing described resource to make provides service with the priority orders that descends to all logic channels, up to the size of waiting for each Radio Link control (RLC) status protocol data cell (PDU) that transmits; If remained any resource, then distributing such surplus resources to make provides service with the priority orders that descends to all logic channels, up to the bit rate (PBR) by prioritizing of their configurations; And if remained any resource, then distribute such surplus resources to make the priority orders that descends with strictness provide service to all logic channels.
[0081] this method may further include: whether dispatched the status PDU that be used to transmit for each delivery time interval (TTI) by the inspection of medium access control (MAC) entity in the RLC entity; And if the status PDU that is used to transmit that has scheduling, then the reception information relevant with the size of described status PDU.
[0082] in another aspect of the present invention, a kind of being used in the mobile communication system method of allocating resources, can comprise: by medium access control (MAC) layer Resources allocation, making provides service with the priority orders that descends to all logic channels, adds the size of each RLC status PDU of waiting for transmission up to each bit rate by prioritizing (PBR) of logic channel; And if remained any resource, then distribute described surplus resources by described MAC entity, make the priority orders that descends with strictness provide service to all logic channels.
[0083] this method may further include: whether dispatched the status PDU that be used to transmit for each TTI by the inspection of described MAC entity in the RLC entity; And if dispatched the described status PDU that is used to transmit, then receive the information relevant with the size of described status PDU.
[0084] in one aspect of the invention, a kind of Radio Link control (RLC) entity in mobile communication system can comprise module, and this module is configured to: receive the indication of resource from medium access control (MAC) entity; Check whether dispatched the status PDU that will send to reciprocity RLC entity; The size of the resource of described indication is compared with the size of the described status PDU that will send; If more than or equal to described status PDU, then at first distribute described resource, so that send described status PDU to described reciprocity RLC entity to status PDU according to the described resource of described comparative result; And if according to the described resource of described comparative result less than described status PDU, then skip the transmission of described status PDU.
Beneficial effect
[0085] when Radio Resource less than the scheduling the status PDU that is used to transmit the time, correlation technique does not define the method for operation of receiver side AM RLC, this causes the deadlock situation of agreement.Therefore, the present invention allows the MAC layer to consider the size of RLC status PDU when Resources allocation, and allow rlc layer when Resources allocation at first to RLC status PDU Resources allocation, so that no matter realize the stable operation of agreement under the situation of wireless environment.
Description of drawings
[0086] Fig. 1 is the network architecture as Long Term Evolution (LTE) system of correlation technique mobile communication system;
[0087] Fig. 2 is based on the framework of the Radio interface protocols control plane of 3GPP Radio Access Network standard between terminal and E-UTRAN;
[0088] Fig. 3 is based on the framework of the Radio interface protocols user plane of 3GPP Radio Access Network standard between terminal and E-UTRAN;
[0089] Fig. 4 is the form of the status PDU of current use in the LTE system;
[0090] Fig. 5 is the flow chart of diagram according to the tactic process of bgical channel priority of the MAC layer of the first embodiment of the present invention;
[0091] Fig. 6 is the flow chart that illustrates the tactic process of bgical channel priority of MAC layer according to a second embodiment of the present invention; And
[0092] Fig. 7 is the method that is used for coming by the size of considering status PDU assigned radio resource by the rlc layer execution of diagram a third embodiment in accordance with the invention.
Embodiment
[0093] the present invention is applied to mobile communication system, and more specifically, is applied to the Universal Mobile Telecommunications System (E-UMTS) from the evolution of UMTS evolution.Yet the present invention is not limited to this system, but can be applicable to any communication system and the communication protocol of scope according to the invention.
[0094] because under the situation that does not break away from characteristic of the present invention, can embody feature of the present invention with some forms, so it should also be understood that, the foregoing description is not subject to any details of aforementioned description, except as otherwise noted, but should as the scope of the present invention defined in the claim of enclosing in carry out the explanation of broad sense, and therefore fall into institute in the equivalent of the border of claim and boundary or such border and boundary and change and revise all and therefore be intended to be contained by the claim of enclosing.
[0095] term that comprises such as 1,2 etc. order numeral can be used to describe various assemblies, but these assemblies can be not limited to these terms.These terms only are used for purpose that an assembly and another assembly are distinguished mutually.For example, first assembly can be called as second assembly, and does not depart from the scope of the present invention, and similarly, second assembly can be called as first assembly.Term " and/or " will comprise the combination of a plurality of items that are associated or any of a plurality of items that are associated.
[0096] when mentioning an assembly " connection " or " access " to another assembly, this assembly can directly connect or be linked into this another assembly; Yet any intermediate module may reside in therebetween.On the other hand, when mentioning a described assembly " directly connection " or " directly inserting " to another assembly, being appreciated that does not have other intermediate modules to be stored in therebetween.
[0097] term that uses in the present invention is used to illustrate preferred embodiment, and and is not intended to restriction the present invention.Odd number is represented to comprise a plurality of expressions, unless its expression and the clear and definite different implication of context.The term that uses in the present invention " should be comprised " or " having " is interpreted as that they are intended to that indication exists in disclosed feature in the specification, number, step, operation, assembly, item or it makes up, and not should be understood to them and be intended to formerly get rid of the possibility that has one or more other features, number, step, operation, assembly or its any combination or add those things.Unless otherwise defined, all terms comprise technology or scientific terminology as used herein, can have the implication identical with the implication of those skilled in the art's common sense.Have with dictionary in the Essential Terms of the identical implication that defines should be interpreted as having the implication identical with context implication.Unless definition clearly in the present invention, such term should not be interpreted as having ideal or excessive formal implication.
[0098] hereinafter, will provide description according to the preferred embodiment of the invention with reference to the accompanying drawings in detail.For the purpose of briefly describing with reference to the accompanying drawings, identical or equivalent assemblies has been provided identical Reference numeral regardless of Reference numeral, and has omitted being repeated in this description it.
[0099] the present invention recognizes following: for particular logical channel, if institute's assigned radio resource less than the RLC status PDU that will send via corresponding logic channel, then can't structural regime PDU.
[00100] consider such understanding, the present invention is conceptive to be characterised in that 1) in MAC layer (MAC entity) logical channels prioritizing so that under the situation of each logical channel assignment Radio Resource; 2) allow the MAC layer to distribute described Radio Resource based on the size of the RLC status PDU that will send from rlc layer; And also 3) allow rlc layer when using institute's assigned radio resource before the RLC data PDU user mode PDU, thus 4) can prevent that rlc protocol from entering deadlock situation owing to delivery status PDU not.
[00101] first and second embodiment of the present invention have illustrated the method for operation in the MAC layer, and the third embodiment of the present invention has illustrated the method for operation in rlc layer.In an embodiment of the present invention, Radio Resource can be called " resource " for short, and is called as " transmission resource ", because it is used for delivery status PDU.
[00102] and, in first to the 3rd embodiment of the present invention, status PDU is sent to reciprocity RLC entity from the RLC entity.Therefore, status PDU can be represented the RLC status PDU, and two title states, and PDU and RLC status PDU all are used to describe the present invention.
[00103] hereinafter, the first embodiment of the present invention has been described.
[00104] when logical channels prioritizing (LCP) process, for each logic channel, the MAC layer is at first considered the size by the status PDU of RLC structure.Just, when carrying out the LCP process, then the MAC layer is at first considered the size of the RLC status PDU of each logic channel with the decline priority orders of each logic channel, so that distributing radio resource, and after this carries out the LCP process of correlation technique.
[00105] first embodiment of such process has been described with reference to figure 5.
[00106] Fig. 5 is the flow chart of diagram according to the bgical channel priority sequence arrangement (LCP) of the MAC layer of the first embodiment of the present invention.LCP process for each TTI execution graph 5.
[00107] with reference to figure 5, MAC layer (or MAC entity) receives the information (RLC status PDU size information) relevant with the size of RLC status PDU (S1) from each RLC entity.The MAC layer is considered the RLC status PDU size information that receives from each RLC entity, so as with the descending order of each priority of logical channels to each logical channel assignment Radio Resource (S2).
[00108] if step S2 to each logical channel assignment remained any Radio Resource (S3) after the Radio Resource, then with the priority orders that descends with remaining allocation of radio resources to each logic channel, up to the PBR (S4) of their configurations.After step S4, if remained any Radio Resource, then with the priority orders that descends with remaining allocation of radio resources to data (S6).
[00109] Fig. 6 is the flow chart that illustrates bgical channel priority sequence arrangement (LCP) process of MAC layer according to a second embodiment of the present invention, and this is another exemplary embodiment of the LCP process of MAC layer.LCP process for each TTI execution graph 6.Second embodiment of Fig. 6 is compared with first embodiment of Fig. 5, in the embodiment of Fig. 6, when the assignment logic channel, carry out the LCP program based on each status PDU size and each PBR.Just, the descending order with priority of logical channels distributes all logic channels based on each PBR and each RLC status PDU.
[00110] hereinafter, will according to a second embodiment of the present invention LCP process be described in more detail with reference to figure 6.
[00111] MAC layer (MAC entity) receives the information (RLC status PDU size information) relevant with the size of RLC status PDU (S11) from each RLC entity.Then, the MAC layer based on the RLC status PDU size information that receives from each RLC entity and each PBR with the priority orders that descends to each logical channel assignment Radio Resource (S12).
[00112] after step S12, if remained any Radio Resource (S13), then the MAC layer can further be assigned to residual resource data (S14) with the priority orders that descends.
[00113] simultaneously, under the situation of first and second embodiment of the present invention, for each TTI, for the size of the RLC status PDU of considering each logic channel during the LCP process, the RLC entity should be notified to the MAC layer with the size of the status PDU that is used to transmit of scheduling.
[00114] as mentioned above, first and second embodiment of the present invention illustrated can by between RLC entity and MAC layer alternately based on RLC status PDU size information to each logical channel assignment Radio Resource.Therefore, in the present invention, can be before data PDU with allocation of radio resources to status PDU, make can be before data PDU transmit status PDU.
[00115] hereinafter, the third embodiment of the present invention will be described.
[00116] Fig. 7 is the flow chart that is used for coming based on the size of status PDU the method for distributing radio resource by the rlc layer execution of diagram a third embodiment in accordance with the invention.
[00117] illustrated as first and second embodiment of the present invention, in order to support the operation of MAC,, should check the status PDU that is used to transmit that whether has scheduling for each TTI, if and exist, then the size of corresponding status PDU should be notified to MAC.Need such RLC-MAC alternately to allow the method for operation of MAC.
[00118] yet, different with above method, can operate RLC itself to avoid the RLC deadlock state.Just, when receiving the information relevant (indication) with available resources from the MAC layer, if these available resources more than or equal to the size of status PDU, then the RLC entity can be with the status PDU that is used to transmit with respect to the RLC data PDU by prioritizing.Just, at first these available resources are assigned to the RLC status PDU, and if remained any resource, then such residual resource is assigned to the RLC data PDU.
[00119] and, if from these available resources of MAC indication less than status PDU, then for this conveyer meeting, the RLC entity is transmit status PDU (that is the transmission of skip state PDU) not.In other words, in conveyer meeting the earliest, that is, when available resources during more than or equal to status PDU big or small, the RLC entity can transmit status PDU.
[00120] still with reference to figure 7, the RLC entity receives the indication (S21) of available resources from the MAC layer.If the size of received available resources is more than or equal to the size (S22) of status PDU, then the RLC entity is at first to RLC status PDU Resources allocation (S23).After status PDU has been distributed resource, if remained any resource, then the RLC entity distributes residual resource (S24) to the RLC data PDU then.Yet, if the size of Radio Resource less than the size (S22) of status PDU, for this conveyer meeting, the RLC entity is skipped the transmission of RLC status PDU.Afterwards, the RLC entity is checked the size of Radio Resource for each TTI, the transmit status PDU (S25) during greater than status PDU with the size of convenient resource.
[00121] hereinafter, will describe according to RLC entity of the present invention.
[00122] RLC entity according to the present invention can be the equipment that comprises module, and this module is configured to: receive the indication of Radio Resource from the MAC layer; Check whether dispatched the status PDU that will send to reciprocity RLC entity; The size of received Radio Resource is compared with the size of the status PDU that is used to transmit of scheduling, if according to the comparative result Radio Resource more than or equal to status PDU, then at first distribute described Radio Resource so that to reciprocity RLC entity transmit status PDU to status PDU, if and according to the comparative result Radio Resource less than status PDU, the then transmission of skip state PDU.Simultaneously, this module can comprise a plurality of assemblies according to its function.Just, this module can comprise the receiving element that is used to receive Radio Resource, be used for comparing unit that the size of Radio Resource is compared with the size of the status PDU that is used to transmit of scheduling and the delivery unit that is used for delivery status PDU.Therefore, can realize this module with each the various types of assembly that can carry out its function.
[00123] RLC entity according to the present invention consists essentially of except aforementioned components and realizes the needed software and hardware of scope of the present invention, for example, output equipment (for example, display, loud speaker etc.), input equipment (for example, keyboard, microphone etc.), memory, transceiver (for example, RF module, antenna etc.).Those skilled in the art obviously is appreciated that such assembly, and therefore will not repeat detailed description.
[00124] simultaneously, describe so far, the method according to this invention can realize by hardware or software or its any combination.For example, the method according to this invention can be stored in the storage medium (for example, the internal storage of portable terminal, flash memory, hard disk etc.).Alternatively, the method according to this invention may be implemented as code or the command word in the software program that can be carried out by processor (for example, the microprocessor in the portable terminal).
[00125] reference is that exemplary embodiment has been explained the present invention only.It will be apparent to those skilled in the art that under the situation that does not break away from the spirit or scope of the present invention, in the present invention other embodiment that can carry out various modifications and be equal to.And, will understand, can optionally whole or partially combined previous embodiment realize the present invention.Therefore, the invention is intended to cover the modification and the variant of this invention, as long as they fall within the scope of claim and equivalent thereof.
Claims (10)
1. one kind is used for transmitting the method that Radio Link is controlled (RLC) protocol Data Unit (PDU) in mobile communication system, comprising:
Receive the indication of available resources from medium access control (MAC) entity;
Use the indication of described available resources, be higher than the transmission of RLC data PDU priorization RLC control PDU; And
Transmit the RLC PDU of described priorization.
2. method according to claim 1 further comprises:
Distribute described available resources to described RLC control PDU, and if remained any resource, then described residual resource is assigned to described RLC data PDU.
3. method according to claim 1, wherein, described RLC control PDU represents the RLC status PDU,
Wherein, described method further comprises:
If from the described available resources of described MAC entity indication size less than a status PDU, then for this conveyer meeting, the transmission of skipping a described status PDU by described RLC entity.
4. method according to claim 3 wherein, is checked described available resources and a described status PDU at each delivery time interval (TTI).
5. method according to claim 1, wherein, described RLC control PDU represents the RLC status PDU,
Wherein said method further comprises:
At each (TTI) at interval delivery time, check whether dispatched the status PDU that is used to transmit by described RLC entity, and if then notify the size of described status PDU to described MAC entity.
6. method of dividing the resource be used in transmission in mobile communication system comprises:
Distribute described resource, make all logic channels serviced, up to the size of waiting for each Radio Link control (RLC) status protocol data cell (PDU) that transmits with the priority orders that descends;
If remained any resource, then distribute such surplus resources, make all logic channels serviced, up to the bit rate (PBR) of the priorization of their configurations with the priority orders that descends; And
If remained any resource, then distribute such surplus resources to make all logic channels serviced with the priority orders that strictness descends.
7. method according to claim 8 further comprises:
In described RLC entity, whether dispatched the status PDU that is used to transmit by the inspection of medium access control (MAC) entity at each delivery time interval (TTI); And
If there is the status PDU that is used to transmit that is scheduled, then receive the information relevant with the size of described status PDU.
8. method of allocating resources in mobile communication system comprises:
By medium access control (MAC) layer Resources allocation, make all logic channels serviced with the priority orders that descends, add the size of waiting for each the RLC status PDU that transmits up to the bit rate (PBR) of each priorization of described logic channel; And
If remained any resource, then distribute described surplus resources by described MAC entity, make all logic channels serviced with the priority orders that strictness descends.
9. method according to claim 8 further comprises:
Check in described RLC entity whether dispatched the status PDU that is used to transmit by described MAC entity at each delivery time interval (TTI); And
If dispatched the described status PDU that is used to transmit, then receive the information relevant with the size of described status PDU.
10. the control of the Radio Link in the mobile communication system (RLC) entity comprises module, and this module is configured to:
Receive the indication of resource from medium access control (MAC) entity;
Check whether dispatched the status PDU that will send to reciprocity RLC entity;
The size of the resource of described indication is compared with the size of the described status PDU that will send;
If more than or equal to described status PDU, then at first distribute described resource, so that send described status PDU to described reciprocity RLC entity to described status PDU according to the described resource of described comparative result; And
If less than described status PDU, then skip the transmission of described status PDU according to the described resource of described comparative result.
Applications Claiming Priority (8)
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| US2531108P | 2008-02-01 | 2008-02-01 | |
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| US2611908P | 2008-02-04 | 2008-02-04 | |
| US61/026,119 | 2008-02-04 | ||
| KR1020090007152 | 2009-01-29 | ||
| KR20090007152A KR101509766B1 (en) | 2008-02-01 | 2009-01-29 | Method for sending rlc pdu and allocating radio resource in mobile telecommunications system and rlc entity of mobile telecommunications |
| KR10-2009-0007152 | 2009-01-29 | ||
| PCT/KR2009/000479 WO2009096746A2 (en) | 2008-02-01 | 2009-01-30 | Method for sending rlc pdu and allocating radio resource in mobile communications system and rlc entity of mobile communications |
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| JP (1) | JP5037633B2 (en) |
| KR (1) | KR101509766B1 (en) |
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| CN102860115A (en) * | 2010-04-23 | 2013-01-02 | 诺基亚公司 | Method and apparatus for transfer of radio resource allocation |
| CN104685959A (en) * | 2012-09-12 | 2015-06-03 | 英特尔公司 | Passive radio link control entity with unified interface |
| CN106717102A (en) * | 2016-11-09 | 2017-05-24 | 北京小米移动软件有限公司 | Control protocol data unit (PDU) transmission method and device |
| WO2017177785A1 (en) * | 2016-04-15 | 2017-10-19 | 中兴通讯股份有限公司 | Data retransmission method and apparatus |
| CN107846369A (en) * | 2016-09-19 | 2018-03-27 | 中兴通讯股份有限公司 | Business scheduling method and device and corresponding base station |
| WO2021056313A1 (en) * | 2019-09-26 | 2021-04-01 | Oppo广东移动通信有限公司 | Method for uplink logical channel multiplexing and terminal device |
| CN114513859A (en) * | 2015-07-20 | 2022-05-17 | 三星电子株式会社 | Communication method and device in wireless communication system |
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| KR101335869B1 (en) * | 2009-08-12 | 2013-12-02 | 엘지전자 주식회사 | Apparatus and method of allocating resources for logical channels in wireless communication system |
| CN113364565B (en) * | 2019-03-22 | 2023-07-21 | 展讯通信（上海）有限公司 | Resource allocation method and device, storage medium and terminal |
| CN111294980B (en) * | 2019-03-28 | 2022-02-15 | 展讯通信（上海）有限公司 | Method and device for establishing radio bearer |
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- 2009-01-30 JP JP2009553532A patent/JP5037633B2/en active Active
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102860115A (en) * | 2010-04-23 | 2013-01-02 | 诺基亚公司 | Method and apparatus for transfer of radio resource allocation |
| CN102860115B (en) * | 2010-04-23 | 2016-06-01 | 诺基亚技术有限公司 | For the method and apparatus transmitting radio resources allocation |
| CN104685959A (en) * | 2012-09-12 | 2015-06-03 | 英特尔公司 | Passive radio link control entity with unified interface |
| CN104685959B (en) * | 2012-09-12 | 2019-04-09 | 英特尔公司 | Passive radio link control entity with unified interface |
| CN114513859A (en) * | 2015-07-20 | 2022-05-17 | 三星电子株式会社 | Communication method and device in wireless communication system |
| WO2017177785A1 (en) * | 2016-04-15 | 2017-10-19 | 中兴通讯股份有限公司 | Data retransmission method and apparatus |
| CN107846369A (en) * | 2016-09-19 | 2018-03-27 | 中兴通讯股份有限公司 | Business scheduling method and device and corresponding base station |
| CN106717102A (en) * | 2016-11-09 | 2017-05-24 | 北京小米移动软件有限公司 | Control protocol data unit (PDU) transmission method and device |
| WO2018086010A1 (en) * | 2016-11-09 | 2018-05-17 | 北京小米移动软件有限公司 | Control protocol data unit (pdu) sending method and apparatus |
| US11044738B2 (en) | 2016-11-09 | 2021-06-22 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and device for sending control protocol data unit (PDU) |
| WO2021056313A1 (en) * | 2019-09-26 | 2021-04-01 | Oppo广东移动通信有限公司 | Method for uplink logical channel multiplexing and terminal device |
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| JP5037633B2 (en) | 2012-10-03 |
| GB201002891D0 (en) | 2010-04-07 |
| GB2467452B (en) | 2012-10-24 |
| JP2010521869A (en) | 2010-06-24 |
| KR20090084722A (en) | 2009-08-05 |
| GB2467452A (en) | 2010-08-04 |
| CN101682916B (en) | 2016-09-07 |
| KR101509766B1 (en) | 2015-04-15 |
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