WO2009099305A2 - Dispositif et procédé destinés à constituer un paquet de transmission dans un système de communication mobile - Google Patents

Dispositif et procédé destinés à constituer un paquet de transmission dans un système de communication mobile Download PDF

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Publication number
WO2009099305A2
WO2009099305A2 PCT/KR2009/000566 KR2009000566W WO2009099305A2 WO 2009099305 A2 WO2009099305 A2 WO 2009099305A2 KR 2009000566 W KR2009000566 W KR 2009000566W WO 2009099305 A2 WO2009099305 A2 WO 2009099305A2
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WIPO (PCT)
Prior art keywords
size
rlc
rlc pdu
pdu
minimum
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PCT/KR2009/000566
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English (en)
Korean (ko)
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WO2009099305A3 (fr
Inventor
Soeng-Hun Kim
Gert Jan Van Lieshout
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Samsung Electronics Co., Ltd.
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Priority claimed from KR1020090008526A external-priority patent/KR20090086033A/ko
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2009099305A2 publication Critical patent/WO2009099305A2/fr
Publication of WO2009099305A3 publication Critical patent/WO2009099305A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to an apparatus and method for configuring a transmission pattern of a mobile terminal in a mobile communication system, and more particularly, to an apparatus and method for determining an I size with a radio link control (RLC) protocol data unit (PDU) of a mobile terminal.
  • RLC radio link control
  • PDU protocol data unit
  • UMTS system in mobile communication system is a UMTSOJni versa I Mobile Telecommunication Service (MST) system that enables communication from anywhere in the world through various systems such as cellular, wireless telephone, wireless subscriber network, wireless LAN and satellite communication. Rem. It is based on the European System of Global Communications for GSM (GSM) and is based on General Packet Radio Services (GPRS) and uses Broadband Code Division Multiple Access (hereinafter referred to as "CDMA").
  • GSM European System of Global Communications for GSM
  • GPRS General Packet Radio Services
  • CDMA Broadband Code Division Multiple Access
  • IP Internet Protocol
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partners i Project
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partners i Project
  • LTE is a technology that implements high-speed packet-based mobile communication with a transmission rate of up to 100 bps, aiming for commercialization in 2010.
  • various measures are discussed. For example, a method of reducing the number of nodes located on a communication path by simplifying a network structure, or approaching wireless protocols as close as possible to a wireless channel are under discussion.
  • FIG. 1 one part of the next generation mobile communication system structure will be described by creating FIG. 1.
  • E-RAN Next-generation base stations
  • E-RAN evolved radio access networks
  • SGSN Serving GPRS Support Node
  • GGSN Gateway GPRS Support Node
  • IP Internet Protocol
  • the ENBs 120 to 128 correspond to Node Bs of the UMTS system and are connected to the UE 101 by a radio channel.
  • the ENBs 120 to 128 play a more complicated role than the Node B, and one ENB typically controls a plurality of cells.
  • all user traffic including real-time services such as Voice II Internet Protocol (VoIP), is served over a shared channel.
  • VoIP Voice II Internet Protocol
  • an apparatus for collecting and scheduling situation information of the UEs 101 is required, and the ENBs 20 to 128 are responsible for this.
  • it performs ARQ (Automatic Repeat Request) for retransmitting an error frame performed by RNG of UMTS system and Radio Resource Control (hereinafter referred to as "RRC") to determine radio resources and handover. do.
  • ARQ Automatic Repeat Request
  • the UE (101) and the ENB (120 to 128) is an orthogonal frequency division multiplexing in the 20 MHz bandwidth in order to implement the transfer rate of up to 100 Mbps (Orthogonal Frequency Division Multiplexing ⁇ ' below "OFDM" as invited) radio access Use it as a technique.
  • a modulated ion scheme and an adaptive modulation < RTI ID 0.0 > (AMC) < / RTI >
  • FIG. 2 is a schematic diagram of a protocol stack of a general mobile terminal and a next-generation base station.
  • Both the mobile terminal and the next-generation base station have the same form, and include Packet Data Convergence Protocol (PDCP) 220 and 255, Radio Link Control (RLC) 225 and 250, edium access control (MAC) 230 and 245, and physical It is made up of layers 235 and 240. Then, in the following description of the operations performed in each protocol layer, when the UE 205 transmits data and the ENB 210 receives the data, the radio protocol layer processes the packet at the radio protocol layer.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC edium access control
  • the PDCP layer 255 is used only in the packet exchange area, and compresses the header of the IPEH kit on the packet data E to be transmitted by the UE 205 so as to increase the transmission efficiency of packet data in the wireless channel. It outputs the PDCP PDU (Packet Data Unit: hereinafter referred to as "PDU" of the protocol).
  • PDU Packet Data Unit
  • the RLC layer 225 divides data transmitted from a higher layer into RLC SDUs to form data of an appropriate size for a radio interval, concatenates the divided RLC SDUs, forms an RLG PDU *, and transmits a packet. If it fails, perform ARQ operation.
  • the MAC layer 230 is a layer responsible for mapping between logical channels and transport channels.
  • the MAC layer 230 is connected to a plurality of RLC entities and multiplexes the output RLC PDUs to output them as MAG PDUs.
  • the physical layer 235 is a layer for providing an information transmission service using a wireless transmission technology.
  • the physical layer 235 performs channel coding, modulation, and outputs the multiplexed MAC PDU on a wireless channel.
  • the g layer 240 of the ENB 210 outputs the channel data decoded and demodulated from the UE 205 to a higher layer.
  • the channel decoded and demodulated data ⁇ is input to the MAC layer 245 in the form of a MAC PDU.
  • the MAC layer 245 then demultiplexes and separates 9 MAC SDUs from MAC PDUs. That is, MAC SDUs become RLC PDUs.
  • the RLC layer 250 interprets the information of the RLG PDU in order to recover the original RLC SDU from the RLC PDUs, separates the information into an RLC SDU, and outputs the information to the upper layer.
  • the PDCP layer 255 which is an upper layer of the RLC layer 250, is responsible for the restoration of the IP header from the RLC SDUs.
  • the UE 205 and the ENB 210 have the same structure of the protocol stack, and the same high-definition inverse fixation described above is also performed. That is, even when the ENB 210 transmits data and the UE 205 receives the data, the process of processing a packet in the radio protocol layer is performed in the same manner.
  • IP is one of the core services because all services are provided on a packet basis. Because VoIP traffic is continuously generated at small intervals with a small number of packets, high overhead can occur in a base station scheduler-based mobile communication system. For example, a VoIP service operating in 12.2 kbps AMR codec mode has a size of about 35 bytes.
  • EH kits occur at 20 msec.
  • the overhead due to the control information may be larger than the actual user data because information for requesting scheduling and uplink resource allocation information are transmitted whenever a packet occurs.
  • LTE uses a persistent scheduling scheme.
  • a semi-persistent transmission ' resource allocation scheme will be described with reference to FIG. 3.
  • 3 is an exemplary view for explaining a general process of data transmission according to a semi-persistent transmission resource allocation scheme.
  • the ENB 310 indicates to the UE 305 a semi-permanent transmission resource that is periodically repeated and a semi-permanent transmission format to be applied to the semi-permanent transmission resource in step 315.
  • the UE 305 transmits data through the semi-persistent transmission resource without a separate control signal exchange, and a semi-persistent transmission format is applied to the data transmitted through the semi-persistent transmission resource.
  • the transmission format refers to a modulation scheme, a packet size, a channel coding scheme, and a coding scheme.
  • the semi-persistent transmission format refers to a transmission format that the terminal applies to the data in transmitting data through semi-persistent transmission resources.
  • the size of the EH kit in the transmission format means the size of the MAC PDU.
  • the size of the MAC PDU transmitted through the semi-persistent transmission resource is called a semi-persistent MAC PDU size.
  • FIG. 4 is a diagram illustrating the size distribution of VoIP packets after header compression.
  • the size of the header compressed VoIP II packet has a distribution as shown in FIG.
  • X bytes When the size of the smallest packet is referred to as X bytes, X byte packets occur most frequently, packets that are several bytes larger than X bytes occur at low frequency, and larger packets occur at extremely low frequency.
  • it is effective to set the size of the semi-permanent MAC PDU to a size that can transmit a packet of several bytes larger than the smallest VoIP packet.
  • the packet should be split and transmitted when a packet that is several bytes larger than the smallest V () IP EH kit occurs.
  • Split transmission avoids error occurrences and transmission delays It is desirable to avoid this because it increases.
  • the frequency of partitioning can be reduced.
  • the size of the semi-permanent MAC PDU is set to the size of the largest VoIP packet, split transmission can be completely prevented, but in most cases, excessively allocated transmission resources are used as padding, which wastes transmission resources. There is a problem.
  • the split transmission of VoIP packets may increase, unlike the original intention. have.
  • the MAC PDU to be transmitted through the semi-persistent transmission resource is the first VoIP HH of the transmission packet.
  • the terminal stores data among all available MAC PDUs, the terminal divides and stores the next VoIP packet in the remaining space of several bytes. As described above, since the packet having the smallest size occurs most frequently, the extra space is also frequently generated, and there is a problem that the split transmission is continuously generated.
  • the semi-permanent MAC PDU 501 size consists of adding the conventional RLC header 510 and MAC header 505 to the smallest RLC SDU 515 and adding the margin 520 of several bytes to it.
  • the size of the RLC PDU 503 is composed of a value that is typically added to the RLC SDU 515 RLC header 510.
  • the UE receives an uplink transmission resource from a base station, receives a size of a MAC PDU to be transmitted through the transmission resource, and then determines sizes of RLC PDUs to be multiplexed into the MAC PDU.
  • the terminal determines the size of the RLC PDU for each logical channel by using the priority of the logical channel and the amount of data stored in the logical channel.
  • the logical channel refers to an apparatus for processing a PDCP layer or PDCP layer configured to process data of a specific service, and an apparatus for processing an RLC layer or an RLC layer.
  • Each logical channel is provided with a transport buffer. .
  • Upper layer packets such as VoIP packets, are stored in the transport packet prior to transmission over the wireless channel.
  • the priority of the logical channel is specified in a call setup process.
  • 6 is a general diagram for determining the size of an RLC PDU for configuration of a MAC PUD It is a figure for demonstrating operation
  • the logical channel 1 605, the logical channel 2 610, and the logical channel 3 615 are configured.
  • the terminal when the terminal generates the MAC PDU 610 having an arbitrary size, if the priority of the logical channels I is in the order of logical channel 1, logical channel 2, logical channel 3, the terminal transmits the MAC PDU.
  • I stores the data stored in the transmission bay I '630 of the logical channel 1 605 having the highest priority in the load 655 as much as possible. That is, the RLC PDL 645 having the same size as in Equation 1 is configured in the logical channel 1 605 and stored in the MAC payload 655.
  • RLC PDU SIZE— m ⁇ [MAC pay load size, MAX RLC PDU SIZE— m]
  • the RLC PDU SIZE_m refers to the RLC PDU size of the logical channel m
  • the MAX RLC PDU SIZE_m indicates the transmission bandwidth of the logical channel m.
  • the size of the RLC PDU containing all data in the payload. Equation (1) is the size of the RLC PDU in which the data stored in the transmission channel I ⁇ of the logical channel m is maximally stored in the MAC payload and the smaller of the MAC payload size is the size of the RLC PDU of the logical channel m. Means ⁇ .
  • the RLC PDU 650 having the same size as the following Equation 2 is configured in the logical channel 2 and then stored in the MAC payload part 655.
  • RLC PDU SIZE_n MIN [Remaining MAC pay load size, MAX RLC PDU SI E_n]
  • the Remaining MAC pay load size means the size of the remaining MAC payload remaining after receiving the RLC PDU of higher priority.
  • the terminal repeats the male process until the size of the remaining MAC payload becomes zero.
  • Equation (1) shows the size of the RLC PDU and the RLC of the logical channel m, where the data stored in the transmission channel of logical channel n is stored in the MAC payload remaining after storing the RLC PDU of the logical channel m.
  • Size of MAC payload remaining after storing PDU The smaller size means that the RLC PDU size of the logical channel ⁇ is shorter.
  • the UE configures the RLC PDU of the maximum size that can be transmitted in the corresponding logical channel from the logical channel having the highest priority, and thus remains in the payload of the MAC PDU.
  • the RLC PDU is a concatenation of the RLC header and the RLC payload.
  • the maximum of any Lodge barrels channel RLC PDU size is the sum of the sizes when sunip de all the data stored in the Lodge barrels channel which RLC P I ", RLC payload and RLC Hi ⁇ .
  • FIG. 7 illustrates an example of a general operation of MAG PDU multiplexing in a mobile station when semi-persistent resource allocation.
  • the size of the most frequently generated RLC SDU is 36 bytes
  • the RLC header is 1 byte
  • the MAC header is 1 byte
  • the ⁇ binary is 2 bytes
  • the size of the semi-permanent MAC PDU is 40 bytes.
  • the RLC SDU to be transmitted at the X th transmission time is determined by the X th RLC SDU 705, the RLC SDL x + 1 th RLC SDU 710 to be transmitted at the x + 1 th time, and the x + 2 th transmission time point.
  • the RCL SDU to be transmitted is called the x + 2 th RLC SDU 715.
  • the terminal since the size of the semi-permanent MAC PDU (720, 735) in the X-th transmission is 40 bytes, the terminal generates an RLC PDU of the maximum size that can be transmitted in 40 bytes, that is, 39 bytes RLC PDU. If only the x-th RLC SDU 705 is left in the RLC PDU, the size of the RLC PDLK740 becomes 37 bytes. Accordingly, the terminal divides and stores a part of the x + 1 th RLC SDU 710 in the RLC PDU 745.
  • the RLC PDU header stores 2 bytes in °, and the first 1 byte of the x + 1 th RLC SDU 710 is stored in the margin 725 of the RLC PDU 720 where the x th is transmitted. Is sent. This split transmission is also performed in the next transmission of the MAC PDU 735. That is, the x + 1 th transmitted MAC PDU 735 is also divided into the remaining x + 1 th RLC SDU 710 and the x + 2 th RLC SDU to be transmitted next, so that the margin of the MAC PDU 735 is divided. 730 is received and then transmitted.
  • the allocated semi-permanent resource has a azine
  • transmission delay occurs because RLC SDU is continuously transmitted in MAC PDU, and retransmission may be requested like real time service or similar real time service. If it is not possible, the received packet must be discarded, which causes a problem of degrading the quality of service.
  • the present invention provides a packet configuration apparatus and method capable of preventing unnecessary retransmission of a transport packet.
  • the present invention is to provide a packet configuration apparatus and method that can prevent the degradation of service quality.
  • the present invention also provides an apparatus and method for constructing a packet to efficiently determine the size of an RLC PDU to be stored in a MAC PDU.
  • the present invention is to provide an apparatus and method for preventing the re-transmission or degradation of the quality of the RLC PDU is divided into the RLC SDU in an excessively small size.
  • the present invention provides a packet configuration apparatus and method that can reduce the transmission delay and transmission error of the RLC SDU.
  • the RLC PDUs sequentially numbered in the MAC PDUs in order of priority.
  • an apparatus for constructing a packet including at least one packet data unit (PDU), the MAC PDU (Packet Data Unit) sequentially according to priority
  • An RRC layer unit configured to determine an ultra I subdivision parameter for determining a minimum size of an RLC SDU segment that is divided and stored in a last portion of an RLC PDU to be stored in the RLC PDU; Remaining MAC Payload (Oll) of the MAC PDU may remain
  • An RLC PDU size determination unit calculating an approximation value of an RLC PDU size and determining the size of the RLC PDU by comparing the sum of the minimum divided parameter £
  • an RLC layer unit for generating and outputting an RLC PDU selectively including the RLC SDU segment according to the determined size of the RLC PDU.
  • RLC PDU is a method for configuring 3 ⁇ 43 ⁇ 4 to Pohang the (Packet Data Unit PDU), housed in a sequential MAC PDU in order of priority Determining a minimum partitioning parameter for determining a minimum size of an RLC SDU segment that is divided and received at a last portion of the RLC SDU segment; Determining the size of the required RLC PDU for each logical channel according to a predetermined technique and calculating an approximate 3 ⁇ 4 of the size of the RLC PDU within a range not exceeding the size of the required RLC PDU; Determining the size of the RLC PDU by comparing the sum of the minimum partitioning parameter and an approximation of the size of the RLC PDU with the size of the required RLC PDU; And generating and outputting an RLC PDU optionally including the RLG SOU segment according to the determined size.
  • a ⁇ of an RLC PDU housed in a MAC PDU in order of priority An RRC layer unit for determining a minimum partitioning parameter for determining a minimum size of an RLC SDU segment that is divided and stored in a last portion; A MAC layer unit for determining the size of the required RLC PDU for each logical channel according to a predetermined criterion; An approximate 3 ⁇ 4 of the size of the RLC PDU is calculated within a range not exceeding the size of the required RLC PDU, and the sum of the approximate value of the RLC PDU size is obtained by adding the approximate value of the RLC PDU size to the size of the required RLC PDU.
  • An RLG PDU size determining unit for comparing the size of the RLC PDU; And an RLC layer unit that generates and outputs an RLC PDU that selectively includes the RLC SDU segment according to the determined size.
  • FIG. 1 is a diagram illustrating an example of a general next generation mobile communication system structure
  • FIG. 2 is a diagram illustrating a protocol stack structure of a general mobile terminal and a next-generation base station.
  • FIG. 3 is an exemplary diagram illustrating a general process of transmitting data according to a semi-persistent transmission resource allocation scheme.
  • FIG. 4 is a diagram illustrating a size distribution of VoIP packets subjected to header compression
  • FIG. 5 is a diagram illustrating determining a semi-permanent MAC PDU size
  • FIG. 6 is a diagram illustrating a general size of an RLC PDU for configuring a MAC PUD. Drawing for explaining the operation ,
  • FIG. 7 is an exemplary view for explaining a general operation of MAC PDU multiplexing in mobile serial when semi-persistent resource allocation
  • FIG. 8 is an exemplary diagram for explaining an operation of determining the size of an RLC PDU when constructing a packet (MAC PDU) according to the present invention
  • FIG. 9 is a block diagram illustrating an internal block of a mobile terminal for configuration of an H packet according to an embodiment of the present invention.
  • FIG. 10 is a control flow ⁇ diagram for determining the size of the RLC PDU to be left in the II packet according to the first embodiment of the present invention
  • FIG. 11 is a control flowchart for determining the size of an RLC PDU in accordance with a second embodiment of the present invention.
  • the maximum size does not exceed the X byte i RLC. Assume that the size of the PDU is y bytes.
  • the UE may determine the size of the RLG PDU to be generated in any logical channel as follows.
  • the UE determines the size of the RLG PDU as y if the value of subtracting y from X is less than or equal to a predetermined z value, and sets the size of the RLC PDU to X if the value of subtraction y from X is greater than or equal to a predetermined z. Decide This will be described in more detail with reference to the drawings described above.
  • FIG. 8 is an exemplary view for explaining an operation of determining the size of an RLC PDU when configuring a CC-k-M kit (MAC PDU) according to the present invention.
  • the MAC payload 801 receives RLC PDUs 801 and 803 corresponding to each logical channel in the order of increasing priority of each logical channel.
  • FIG. 8 illustrates a case where a residual area exists in the MAC payload after receiving RLC PDUs corresponding to two logical channels.
  • the size of the remaining MAC payload ie, the size of the remaining area, remaining after storing the RLC PDU generated in the logical channel of the higher priority is X bytes 805.
  • the RLC PDU is configured not to exceed X bytes while including the last byte of the RLC SDU. For example, if the transmission priority is RLC SDU [k + 1], RLC SDU [k + 2] RLC SDU [k + n], each RLC
  • the last byte of the SDU is included and the RCL PDU is constructed by storing it sequentially so as not to exceed X bytes.
  • the maximum size of the RLC PDU configured as described above is referred to as y bytes 810.
  • the UE determines the size of the RLC PDU as y when the value of subtracting y from X is less than or equal to a predetermined predetermined z. On the other hand, if the value of subtracting y from X is greater than or equal to a predetermined predetermined z, the size of the RLC PDU is determined as X.
  • z is a parameter for controlling the minimum size of the RLG SDU segment dividedly received at the end of the RLC PDU, and z is for each logical channel.
  • z may be indicated by call setup fixing for each logical channel or may be stored in advance according to each service type. Alternatively, it may be provided periodically or through a specific channel. Alternatively, z may be indirectly inferred using parameters provided in other communications. For example, when the z value is not signaled, the size of the unit framing header may be used as the z value in the logical channel.
  • z will be referred to as the "minimum splitting parameter ⁇ of the RLC SOU segment and commonly used with z.
  • the minimum size of the RLC SDU segment that can be partly stored at the end of the RLC PDU is [zf]. Is the size of a unit framing header consisting of an extension bit, a length indicator, and II coding, and the unit framing header is typically added as a header added to the RLC PDU whenever the last byte of the RLC SDU is left.
  • the length indicator indicates the position of the last byte of the associated RLC SDU, i.e., f is a size limit value of the last RLC SDU, which is used in combination with f as a "size limit value" for convenience of description below. Shall be.
  • the minimum size of the RLC SDU segment is [z-f], so the minimum size of the RLCSDU segment is zero. This means that if z is greater than f, the segments of the RLC SDU are always stored. For example, if the z value is 2 bytes and the RLC P0U size approximation is 100 bytes, then the RLC SDU segment can be left only if the size of the remaining MAC payload is 102 bytes or more, and if the size of the remaining MAC payload is 101 bytes, then RLC Do not store SDU segments.
  • FIG. 9 is an internal block diagram of a mobile terminal for the configuration of a pattern according to an embodiment of the present invention.
  • the RRC layer unit 905 determines z, which is the minimum partitioning parameter of the RLC SDU, and provides it to the RLC PDU size determination unit 910.
  • the RLC PDU size determination unit 910 is previously provided with a MAC PDU size from the MAC layer unit 920. Accordingly, the RLC PDU size determination unit 910 uses the information provided from the RRC layer unit 905, that is, the priority channel I for each logical channel, the size of the RLC SDUs stored in the logical channel, and the I RLC for each logical channel using the z. Determine the PDU size.
  • the RLC PDU size determination unit 910 is the MAC.
  • the RLC PDU sizes determined through this process are informed to a plurality of RLC entities provided in the RLC layer unit 915.
  • the RLC layer unit 915 is a set of RLC elements that are responsible for reliable transmission and reception of higher layer data or RRC messages, and the RLC element stores RLC SDU black or RLC SDU segments, which are higher layer data.
  • Each RLC element configures an RLC PDU according to the determined RLC PDU size and transmits it to the MAC layer unit 920.
  • the MAC layer unit 920 that receives the RLC PDU concatenates the RLC PDUs delivered by the RLC elements to form a MAC PDU, and then delivers the MAC PDU to the physical layer unit 925.
  • the physical layer unit 925 transmits and receives a MAC PDU received from the RLC layer unit 915. That is, encoding and modulation operations, band up conversion and power control operations for transmission over a wireless channel are performed. This process is generally performed in a wireless communication system, which will not be described in detail herein.
  • FIG. 10 is a control flow diagram for determining the size of an RLC PDU to be left in a packet according to the first embodiment of the present invention.
  • the terminal recognizes a z value to be applied for each logical channel in step 1005.
  • the z value may be signaled directly in a call establishment process or the like, may be inferred from another para 0
  • the size of the unit framing header may be used as the z value.
  • the UE calculates an approximation of the size of the RLC PDU.
  • the approximate value of the size of the RLC PDU is the size of the RLC PDU in which the maximum RLC SDU is infiltrated within the range where the remaining MAC ffll does not exceed the load range.
  • the approximation of the size of the RLC PDU inserts up to the last RLC SDU, but does not exceed the range of the remaining MAC
  • the RLC PDU size approximation value is that when the RLC SDUs stored in the transmission channel of the corresponding logical channel are sequentially stored in the RLC PDU even though the last byte is included according to the transmission priority, the size of the RLC PDUs is determined from the higher priority. The size of the RLC PDU closest to the size of the remaining MAC payload remaining after receiving the RLC PDU.
  • RLC SDU [n] 200 bytes
  • RLC SDU [ ⁇ + 1] 500 bytes
  • RLC SDU [n + 2] 290 bytes
  • RLC SDU [n + 3] 300 bytes.
  • the transmission priority of the RLC SDUs is inversely proportional to a serial number ( ⁇ , ⁇ + 1, ⁇ + 2, ⁇ + 3)
  • the RLC SDU [n] RLC SDU [n + 1]
  • RLC SDU in the RLCPDU when the transmission priority of the RLC SDUs is inversely proportional to a serial number ( ⁇ , ⁇ + 1, ⁇ + 2, ⁇ + 3), the RLC SDU [n], RLC SDU [n + 1], and RLC SDU in the RLCPDU.
  • the size of the RLC PDU does not exceed 1000 bytes, which is the size of the remaining MAC payload. Therefore, the approximate value of the RLC PDU size is 995 bytes obtained by adding 1 byte of the basic header size of the RLC PDU and 4 bytes of two unit framing unit headers to 990 bytes.
  • the number of received RLC SDUs is two, but the number of additional unit framing headers is not three, because if the last byte of the RLC SDU matches the last byte of the RLC PDU, the unit framing header of the RLC SOU is RLC. This is because it is not added to the PDU.
  • step 1015 After determining the approximate value of the RLC PDU size, the process proceeds to step 1015 to compare the sum of the approximation value of the RLC PDU size and the z and the size of the residual MAC payload.
  • the comparison result ⁇ if the size of the residual MAC payload is greater than or equal to the sum of the approximate value of the RLC PDU size and the z, proceeds to step 1020, and if not, proceeds to step 1025.
  • step 1015 if the size of the residual MAC payload is an approximation of the size of the RLC PDU and is greater than or equal to the sum of the z, that is, the approximation of the size of the RLC PDU and the sum of the z is the residual MAC payload.
  • I is smaller than or equal to the size of the load, it means that the size of the RLC SDU segment to be divided and left is greater than [zf
  • the size of is determined as the remaining MAC payload size.
  • the RLCSDU segment may be divided and stored at the end of the RLCPDU.
  • the size of the residual MAC payload is smaller than the sum of the approximation of the RLC PDU size and the z in step 1015, that is, the approximation value of the RLC PDU size and the sum of the z are the remaining MAC payload size. Larger means that when the RLC SDU is dividedly stored in the last portion of the RLC PDU, the size of the RLC SDU segment to be received is small, so that the divided transmission of the RLC SDU is meaningless or ineffective.
  • the UE determines the size of the RLC PDU as an approximation of the RLC PDU size calculated in step 1010.
  • an RLC PDU having the determined size is generated in step 1030, and the size of the I residual MAC payload at the corresponding point in time 1035 is determined.
  • the remaining MAC payload size is updated by subtracting the size of the determined RLC PDU and the size of the MAC subheader.
  • FIG. 11 is a control flowchart for determining the size of an RLC PDU according to the second embodiment of the present invention.
  • the second embodiment also uses the I approximation of the RLC PDU size as in the first embodiment, but uses an approximation of the RLC PDU size determined in a different manner from the first embodiment.
  • the UE recognizes a z value to be applied for each logical channel.
  • the MAC layer unit 920 determines the size of the RLC PDU for each logical channel (hereinafter, referred to as a “required RLC PDU”) by using the logical channel priority and the amount of stored data. Notify).
  • the RLC layer unit 915 receiving the requested RLC PDU size uses an size and priority of upper layer data to be transmitted in step 1115, and approximates an RLC PDU size within a range not exceeding the required RLC PDU size (approximate). RLC PDU size) is calculated.
  • the size of the requested RLC PDU is 1000 bytes
  • RLC SDU [n + 1] 500 bytes
  • RLC SDU is 500 bytes
  • RLC SDU is 500 bytes
  • RLC SDU is 500 bytes
  • RLC SDU is 500 bytes
  • RLC SDU is 500 bytes
  • RLC SDU is 500 bytes
  • [n + 2] 250 bytes
  • RLC SDU [n + 3] 300 bytes
  • the size of the RLC PDU is the sum of the payload 1290 bytes and the RLC header size, so that the size of the requested RLC PDU is 1000 bytes and cannot be approximated to the RLC PDU size.
  • the size of the RLC PDU is the payload 950 bytes plus the RLC hyssop bytes. In other words, the value may be an RLC PDU size approximation.
  • the RLC layer unit 915 compares the calculated RLC PDU size approximation with the ⁇ and compares the requested RLCPDU size in step 1120.
  • step 1120 if the size of the RLCPDU is larger than the sum of the approximation of the z value and the RLC PDU size, that is, the sum of the value of the z value and the approximation of the RLCPDU size is smaller than the required size of the RLCPDU, the process proceeds to step 1125. .
  • step 1120 determines whether the required RLCPDU size is less than or equal to the sum of the z-values and the approximation of the RLCPDU sizes in step 1120, that is, the summed values. If the size is greater than or equal to the required RLC PDU size, the process proceeds to step 1130.
  • the RLC PDU having the required RLC P0U size is generated, the RLC SDU segment having a size smaller than [zf] is divided and stored in the last portion of the RLC PDU. In order to prevent the segment from ineffectively remaining, the RLC P0U size approximation calculated in step 1115 is determined as the RLC PDU size.
  • the RLC layer unit 1020 generates an RLC PDU based on the size of the determined RLC PDU and delivers it to the lower layer. Generated above . If the size of the QLC PDU is smaller than the size of the required RLC PDU, that is, if the size of the RLC PDU is an approximation of the size of the RLC PDU rather than the size of the required RLC PDU, the MAC device of the UE determines the required RLC PDU size and the actual RLC PDU size. The difference between the two can be corrected by padding.
  • the present invention uses the logical channel I priority, the size of the stored RLC SDU, and the predetermined parameter to determine the size of the RLC PDU so that the RLC SOU is not divided and stored in an excessively small size. It is possible to prevent continuous transmission.

Abstract

L'invention concerne un dispositif et un procédé destinés à constituer un paquet de transmission dans un système de communication mobile, et notamment un procédé destiné à constituer un paquet comprenant au moins une unité de données en mode paquet (PDU) dans un système de communication. Le procédé consiste à déterminer un paramètre de segmentation minimum déterminant la taille minimale d'un segment RLC SDU reçu au niveau de la dernière des RLC PDU après segmentation, les RLC PDU étant reçues au niveau d'une MAC PDU de manière séquentielle en fonction de leur priorité, à calculer la valeur approximative d'une taille de RLC PDU acceptable pour les données utiles MAC restantes de la MAC PDU, à déterminer la taille de la RLC PDU par comparaison de la taille des données utiles MAC restantes avec la somme des valeurs approximatives associées à la taille du paramètre de segmentation minimum et à la taille de la RLC PDU, puis à créer et produire en sortie la RLC PDU, laquelle inclut sélectivement le segment RLC SDU, en fonction de la taille déterminée.
PCT/KR2009/000566 2008-02-05 2009-02-05 Dispositif et procédé destinés à constituer un paquet de transmission dans un système de communication mobile WO2009099305A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2008-0012004 2008-02-05
KR20080012004 2008-02-05
KR10-2009-0008526 2009-02-03
KR1020090008526A KR20090086033A (ko) 2008-02-05 2009-02-03 이동 통신 시스템에서 전송 패킷 구성 장치 및 방법

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WO2009099305A3 WO2009099305A3 (fr) 2009-10-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020042332A (ko) * 2000-11-30 2002-06-05 구자홍 무선 링크 제어의 트랜스페어런트 엔터티에서 가변길이의프로토콜 데이터 유닛 송신방법
US20050213605A1 (en) * 2004-03-26 2005-09-29 Samsung Electronics Co., Ltd. Method for efficiently utilizing radio resources in a mobile telecommunication system providing VoIP service
KR20080114376A (ko) * 2007-06-27 2008-12-31 삼성전자주식회사 이동 통신 시스템에서 맥 프로토콜 데이터 유닛을 생성하는장치 및 방법
US20090010278A1 (en) * 2006-02-07 2009-01-08 Telefonaktiebolaget L M Ericsson (Publ) Method And Nodes For Providing Adaptive Segmentation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020042332A (ko) * 2000-11-30 2002-06-05 구자홍 무선 링크 제어의 트랜스페어런트 엔터티에서 가변길이의프로토콜 데이터 유닛 송신방법
US20050213605A1 (en) * 2004-03-26 2005-09-29 Samsung Electronics Co., Ltd. Method for efficiently utilizing radio resources in a mobile telecommunication system providing VoIP service
US20090010278A1 (en) * 2006-02-07 2009-01-08 Telefonaktiebolaget L M Ericsson (Publ) Method And Nodes For Providing Adaptive Segmentation
KR20080114376A (ko) * 2007-06-27 2008-12-31 삼성전자주식회사 이동 통신 시스템에서 맥 프로토콜 데이터 유닛을 생성하는장치 및 방법

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