WO2018086693A1 - Dispositif d'émission, dispositif de réception et procédés associés - Google Patents

Dispositif d'émission, dispositif de réception et procédés associés Download PDF

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Publication number
WO2018086693A1
WO2018086693A1 PCT/EP2016/077271 EP2016077271W WO2018086693A1 WO 2018086693 A1 WO2018086693 A1 WO 2018086693A1 EP 2016077271 W EP2016077271 W EP 2016077271W WO 2018086693 A1 WO2018086693 A1 WO 2018086693A1
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WIPO (PCT)
Prior art keywords
transport block
block size
transmitting device
minimum
size
Prior art date
Application number
PCT/EP2016/077271
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English (en)
Inventor
Rama Kumar MOPIDEVI
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/EP2016/077271 priority Critical patent/WO2018086693A1/fr
Publication of WO2018086693A1 publication Critical patent/WO2018086693A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the invention relates to a transmitting device and a receiving device. Furthermore, the invention also relates to corresponding methods, a computer program, and a computer program product.
  • Data traffic between a transmitting device and a receiving device in a wireless communication system such as Long Term Evolution (LTE) and Wideband Code Division Multiple Access (WCDMA), is transferred over the radio interface in transport blocks.
  • the transport blocks are assembled by the transmitting device, which then transmits the assembled transport blocks over the radio interface to the receiving device.
  • the next generation wireless communication systems (such as 5G) are targeting increased data rates. Data rates of 20 Gbps in downlink and 10 Gbps in uplink have been discussed in 3GPP standards.
  • LTE Long Term Evolution
  • UE User Equipment
  • MAC Media Access Control
  • RLC Radio Link Control
  • PDU RLC Protocol Data Unit
  • PHY physical layer
  • An objective of embodiments of the invention is to provide a solution which mitigates or solves the drawbacks and problems of conventional solutions.
  • Another objective of embodiments of the invention is to provide a solution which provides improved handling of transport blocks in wireless communication systems.
  • An "or” in this description and the corresponding claims is to be understood as a mathematical OR which covers “and” and “or”, and is not to be understand as an XOR (exclusive OR).
  • the above mentioned and other objectives are achieved with a transmitting device for a wireless communication system, the transmitting device being configured to
  • transport blocks by sequentially concatenating data packets having a size smaller than the minimum transport block size into a transport block as long as a current size of the transport block is equal to or smaller than the minimum transport block size, and by inserting each data packet having a size between the minimum transport block size and a maximum transport block size into a single separate transport block (without concatenation or segmentation);
  • the current size of the transport block is the size including all the concatenated data packets in this transport block. Hence, the size of a transport block which comprises more than one data packet is not allowed to exceed the minimum transport block size.
  • the maximum transport size could be predefined by the system (e.g. set by a standard and could also be dependent on the category of the transmitting device) or could be defined and adjusted by a lower layer (e.g. RLC performs the concatenation and MAC defines the maximum transport block size for example based on a received transmission grant).
  • a lower layer e.g. RLC performs the concatenation and MAC defines the maximum transport block size for example based on a received transmission grant.
  • embodiments of the present invention introduce a minimum transport block size.
  • Data packets (such as service data unit SDUs from a higher layer) which exceed the minimum transport block size are not concatenated with other data packet but are encapsulated in a transport block as they are.
  • one transport block comprises only one data packet.
  • Data packets below the minimum transport block size are concatenated with other short data packets but only as long as the resulting transport block size remains below or equal to the minimum transport block size.
  • the transmitting device provides a number of advantages over conventional solutions.
  • One such advantage is to leave the concatenation flexibility to the transmitting device and to concatenate short data packets.
  • Another such advantage is to reduce overhead in the system, e.g. minimizing Sequence Number (SN) space or any other non-payload data in this context.
  • SN Sequence Number
  • the transmitting device is configured to
  • the first implementation form offers the advantage of flexibility to the transmitting device which decide when to concatenate or not.
  • the transmitting device is configured to
  • the transmitting device determines if the remaining space is enough to concatenate a new sequential data packet or not. Thereby, improved concatenation is possible.
  • the transmitting device is configured to
  • the minimum transport block size based on a type of service associated with the data packets.
  • the advantage with the third implementation form is to adapt the minimum transport block size to different service types.
  • the minimum transport block size can be larger for enhance Mobile Broadband (eMBB) compared to that for machine to machine communications, etc.
  • eMBB Enhance Mobile Broadband
  • more efficient transmission with lower non-payload is possible in the wireless communication system.
  • the type of service is any of: enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • the transmitting device is configured to
  • each transmission grant grants a transmission of one or more transport blocks and indicates the maximum transport block size for such a transmission
  • the maximum transport block size for the transport block based on at least one maximum transport block size indicated in the one or more transmission grants which will be used to transmit the transport block
  • the minimum transport block size may be obtained by the transmitting device before receiving the transmission grants.
  • the fourth implementation form provides a dynamic updating mechanism for obtaining the maximum transport block size used in the concatenation performed by the transmitting device according to the first aspect. Thereby, assembly of the transport blocks can be adapted to traffic characteristics or channel conditions or any other information provided in the transmission grants for.
  • the transmitting device is configured to
  • the fifth implementation form offers the advantage of adapting the minimum transport block size based on the traffic characteristics or channel conditions or any other information provided in the transmission grants.
  • each one of the one or more transmission grants are associated with different consecutive transmission time intervals.
  • the sixth implementation form provides a mechanism for adapting the minimum transport block size in the time dimension.
  • the minimum transport block size is less than the maximum transport block sizes.
  • the transmitting device is configured to
  • control message indicates the minimum transport block size
  • the control message may be received by the transmitting device before reception of one or more transmission grants.
  • the eighth implementation form provides the advantage of receiving the minimum transport block size along with the other configuration parameters, e.g. at the configuration/initiation of the service associated with the data packets.
  • the transmitting device is further configured to
  • the ninth implementation form offers the advantage to specify the minimum transport block size in a control message which is also associated with the configuration of the service.
  • the control message is transmitted in the same signalling as for the initiation of the service, thereby minimizing the signalling in the system for reduced overhead.
  • the transmitting device is configured to
  • the link layer may e.g. be RLC layer or a corresponding layer, and the layer below the link layer may e.g. be MAC or a corresponding layer.
  • the above mentioned and other objectives are achieved with a receiving device for a wireless communication system, the receiving device being configured to
  • control message indicates the minimum transport block size
  • the receiving device provides a number of advantages.
  • the receiving side typically serves several transmitting devices and grants transmission resources to the transmitting devices based on several factors, such as subscription status, channel conditions, etc.
  • the receiving side can indicate or recommend the minimum transport block size considering these factors along with other configuration parameters. Therefore, the receiving device according to the second aspect can indicate or recommend the minimum transport block size considering configuration parameters in such a way that the transmitting device does not need to update the minimum transport block size too frequently meaning e.g. lower processing load and reduced latency.
  • the receiving device is configured to
  • the minimum transport block size based on a type of service associated with the data packets comprised in the assembled transport blocks.
  • the advantage with the first implementation form is to adapt the minimum transport block size to different service types.
  • the minimum transport block size can be larger for enhance Mobile Broadband (eMBB) compared to that for machine to machine communications, etc.
  • eMBB Enhance Mobile Broadband
  • the type of service is any of: enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • the receiving device is configured to
  • the second implementation form offers the advantage to specify the minimum transport block size in a control message which is also associated with the configuration of the service.
  • the control message is transmitted in the same signalling as for the initiation of the service, thereby minimizing the signalling in the system for reduced overhead.
  • the receiving device is configured to
  • each transmission grant grants a transmission of one or more transport blocks and indicates a maximum transport block size for such a transmission.
  • the third implementation form provides a dynamic updating mechanism at the transmitting device for obtaining the maximum transport block size used in the concatenation performed by the transmitting device according to the first aspect. Thereby, assembly of the transport blocks can be adapted to traffic characteristics or channel conditions or any other information provided in the transmission grants.
  • a transmitting device the method comprises:
  • assembling transport blocks by sequentially concatenating data packets having a size smaller than the minimum transport block size into a transport block as long as a current size of the transport block is equal to or smaller than the minimum transport block size, and by inserting each data packet having a size between the minimum transport block size and a maximum transport block size into a single separate transport block without concatenation; transmitting the assembled transport blocks to a receiving device.
  • the method comprises
  • the method comprises
  • the method comprises
  • the type of service is any of: enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • the method comprises receiving one or more transmission grants from the receiving device, wherein each transmission grant grants a transmission of one or more transport blocks and indicates the maximum transport block size for such a transmission,
  • the method comprises
  • each one of the one or more transmission grants are associated with different consecutive transmission time intervals.
  • the minimum transport block size is less than the maximum transport block sizes.
  • the method comprises receiving a control message from the receiving device, wherein the control message indicates the minimum transport block size
  • the method comprises
  • the method comprises assembling the transport blocks in the link layer
  • a method for a receiving device the method comprises:
  • control message indicates the minimum transport block size
  • the method comprises
  • the type of service is any of: enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • the method comprises
  • the method comprises transmitting one or more transmission grants to the transmitting device, wherein each transmission grant grants a transmission of one or more transport blocks and indicates a maximum transport block size for such a transmission.
  • the invention also relates to a computer program, characterized in code means, which when run by processing means causes said processing means to execute any method according to the present invention. Further, the invention also relates to a computer program product comprising a computer readable medium and said mentioned computer program, wherein said computer program is included in the computer readable medium, and comprises of one or more from the group: ROM (Read-Only Memory), PROM (Programmable ROM), EPROM (Erasable PROM), Flash memory, EEPROM (Electrically EPROM) and hard disk drive.
  • ROM Read-Only Memory
  • PROM Programmable ROM
  • EPROM Erasable PROM
  • Flash memory Flash memory
  • EEPROM Electrically EPROM
  • Fig. 1 shows a transmitting device according to an embodiment of the invention.
  • FIG. 2 shows a method for a transmitting device according to an embodiment of the invention.
  • FIG. 3 shows a receiving device according to an embodiment of the invention.
  • FIG. 4 shows a method for a receiving device according to an embodiment of the invention.
  • FIG. 5 shows transport block assembly
  • FIG. 6 shows transport block assembly
  • FIG. 7 shows transport block assembly
  • FIG. 8 shows a transport block size update mechanism according to an embodiment of the invention.
  • FIG. 9 shows a wireless communication system according to an embodiment of the invention.
  • FIG. 10 shows a wireless communication system according to an embodiment of the invention.
  • FIG. 11 shows signalling and transmission aspects related to embodiments of the invention.
  • - Fig. 12 shows the structure of a Radio Link Control (RLC) Protocol Data Unit (PDU) according to an embodiment of the invention.
  • RLC Radio Link Control
  • PDU Protocol Data Unit
  • a wireless communication system such as WCDMA and LTE
  • data packets from a transmitting device to a receiving device are transmitted over the radio interface in so called transport blocks.
  • the protocols are called radio access protocols or user plane protocols of radio access network or layer 2 protocols in radio access networks.
  • these protocols are Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC) and Media Access Control (MAC) in WCDMA and LTE.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Media Access Control
  • the radio access protocols in layer 2 of the next generation wireless communication systems can be classified to higher layer protocol corresponding to PDCP, a middle layer or link layer corresponding to RLC, and a lower layer corresponding to MAC.
  • the expressions middle layer, link layer, and RLC are used interchangeably in this disclosure.
  • the transport blocks are assembled by the transmitting device from higher layer data packets. To achieve high data rates the transmitting device needs to efficiently assemble the data packets into suitable transport blocks.
  • the transmitting device can either assemble one transport block for each data packet or assemble one transport block from two or more sequential higher layer data packets.
  • the combination of two or more data packets into one transport block is called concatenation.
  • each higher layer data packet irrespective of its size gets a link layer header which typically contains a sequence number (SN).
  • SN sequence number
  • two or more short data packets can share one and the same link layer header.
  • Concatenation can, e.g. reduce the overhead as less addressing space in the transport block is required. This is especially the case if the data packets are short.
  • embodiments of the invention provide a solution that improves the assembly of transport blocks accordingly.
  • the assembly of transport blocks is improved by allowing the concatenation to be flexibly performed compared to conventional assembling techniques.
  • a minimum transport block size and a maximum transport block size are herein introduced.
  • the transmitting device can decide when and how to concatenate the data packets based on the minimum transport block size, the corresponding maximum transport block size and the size of the data packets to be transmitted to the receiving device.
  • the assembly of transport blocks is performed by a transmitting device 100, such as the transmitting device 100 shown in Fig. 1 .
  • the transmitting device 100 comprises a processor 102 coupled to a transceiver 104.
  • the processor 102 and the transceiver 104 are coupled to each other by communication means 108 known in the art.
  • the transmitting device 100 further comprises an antenna 106 coupled to the transceiver 104, which means that the transmitting device 100 is configured for wireless communications in a wireless communication system.
  • the transmitting device 1 00 is configured to derive a minimum transport block size T Min .
  • the transmitting device 1 00 is further configured to assemble transport blocks by sequentially concatenating data packets (DPs) having a size smaller than the minimum transport block size T Min into a transport block TB as long as a current size of the transport block TB is equal to or smaller than the minimum transport block size T Min , and by inserting each data packet having a size between the minimum transport block size T Min and a maximum transport block size T Max into a single separate transport block TB, i.e. without concatenation.
  • the transmitting device 100 is further configured to transmit the assembled transport blocks to a receiving device 300 (see e.g. Fig. 3) which is illustrated with the dotted arrow.
  • Fig. 2 shows a flow chart of a corresponding method 200 which may be executed in a transmitting device 100, such as the one shown in Fig. 1 .
  • the method 200 comprises deriving 202 a minimum transport block size T Min .
  • the method 200 further comprises assembling 204 transport blocks by sequentially concatenating data packets having a size smaller than the minimum transport block size T Min into a transport block TB as long as a current size of the transport block TB is equal to or smaller than the minimum transport block size T Min , and by inserting each data packet having a size between the minimum transport block size T Min and a maximum transport block size T Max into a single separate transport block TB.
  • the method 200 further comprises transmitting 206 the assembled transport blocks to a receiving device 300.
  • the transmission device 100 is configured to stop concatenating data packets into the current transport block TB if a next to be concatenated data packet has a size larger than the remaining space in the current transport block TB until the minimum transport block size T Min is reached. Hence, if with the next to be added data packet the size of the current transport block would exceed the minimum transport block size T Min then the assembling of the current transport block is finished and the transport block is submitted to a lower layer for transmission to a receiving device. The next to be concatenated data packet is then instead assembled into a succeeding transport block TB and if its size is small enough concatenated with other succeeding data packet(s).
  • the transmitting device 1 00 is configured to assemble the transport blocks TBs by inserting each data packet having a size between the minimum transport block size T Min and a maximum transport block size T Max into a single separate transport block TB.
  • the minimum transport block size T Min is less than the maximum transport block size T Max .
  • the transmission device 100 is configured to perform segmentation, i.e. segment the data packet over more than one transport block.
  • the minimum transport block size T Min is obtained by the transmitting device 100.
  • the minimum transport block size T Min is predetermined and available in the transmitting device 100.
  • the minimum transport block size T Min could e.g. be stored in a memory.
  • the transmitting device 100 is configured to determine the minimum transport block size T Min by considering which type of service the to be transmitted data packets are associated with.
  • the type of service can be any of enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • Each service can then have its own minimum transport block size T Min .
  • the transmitting device 100 can derive the minimum transport block size T Min to concatenate TCP Acknowledgements (ACKs).
  • ACKs TCP Acknowledgements
  • the transmitting device 100 can set minimum transport block size T Min so as to concatenate at least two TCP ACKs.
  • the transmitting device 100 can update and derive the minimum transport block size T Min based on the received transmission grants TGs. For example, the transmitting device 100 can set the minimum transport block size T Min to be half of the value of the minimum of the maximum transport block size comprised in the transmission grants TGs for a specified number of TGs or Transmission Intervals (TTI) or a specified time. As an example, denote the maximum transport block sizes in the transmission grants TGs as T TG1 , T TG2 , ... , T TGN .
  • the half of the value of the minimum of the maximum transport block size T Max is equal to: 0.5 * min(T TG1 , T TG2 , ... , T TGN ).
  • each T TG1 , T TG2 , ... , T TGN is associated with its corresponding Transmission Time Interval (TTI), see Fig. 8.
  • TTI Transmission Time Interval
  • the minimum transport block size T Min is received from the network of the wireless communication system, e.g. via a network node, by means of proper control signaling.
  • the maximum transport block size T Max can be derived by the transmitting device 100 from the transmission grants TGs received from the receiving device 300, see e.g. Fig. 8 and 1 1 .
  • Each transmission grant TG grants a transmission of one or more transport blocks and indicates the maximum transport block size T Max for such a transmission.
  • the transmitting device 100 derives the maximum transport block size T Max for the transport block TB based on at least one maximum transport block size indicated in the transmission grants TGs which will be used to transmit the transport block TB, as for example shown above.
  • the transmitting device 100 then transmits the assembled transport blocks to the receiving device 300 based on the transmission grants TGs.
  • Fig. 3 shows a receiving device 300 according to an embodiment of the invention.
  • the receiving device 300 comprises a processor 302 coupled to a transceiver 304.
  • the processor 302 and the transceiver 304 are coupled to each other by means of communication 308 known in the art.
  • the receiving device 300 further comprises an antenna 306 coupled to the transceiver 304, which means that the receiving device 300 is configured for wireless communications in a wireless communication system.
  • the receiving device 300 is configured to derive a minimum transport block size T Min .
  • the receiving device 300 is configured to transmit a control message CM to a transmitting device 100.
  • the control message CM indicates the minimum transport block size T Min .
  • the receiving device 300 is configured to receive assembled transport blocks comprising data packets from the transmitting device 100 in response to the transmission of the control message CM.
  • the assembled transport blocks have been assembled by the transmitting device 100 based on the minimum transport block size T Min indicated in the control message CM.
  • Fig. 4 shows a flow chart of a corresponding method 400 which may be executed in a receiving device 300, such as the one shown in Fig. 3.
  • the method 400 comprises deriving 402 a minimum transport block size T Min .
  • the method 400 further comprises transmitting 404 a control message CM to a transmitting device 100.
  • the control message CM indicates the minimum transport block size T Min .
  • the method 400 further comprises receiving 406 transport blocks TBs comprising data packets from the transmitting device 1 00 in response to the transmission of the control message CM.
  • the minimum transport block size T Min is obtained by the receiving device 300.
  • the minimum transport block size T Min is predetermined and available in the receiving device 300, e.g. stored in a memory.
  • the receiving device 300 is configured to determine the minimum transport block size T Min by considering which type of service the data packets are associated with.
  • the type of service can be any of enhanced Mobile Broad Band, Ultra Reliable Low Latency Communications, and massive Machine Type Communications.
  • the receiving device 300 may derive the minimum transport block size T Min during the configuration of the service associated with the data packets to be transmitted by the transmitting device 100.
  • the transmitting device 100 requests the service by sending a control message requesting the service to the receiving device 300.
  • the transmitting device sends a "RRC Connection Request" message to the receiving device 300 in this respect.
  • the control message can be of similar type.
  • the receiving device 300 will then inform the transmitting device 100 of the derived minimum transport block size T Min by transmitting the earlier described control message CM.
  • the receiving device 300 transmits the control message CM to the transmitting device 1 00 when configuring the service associated with the data packets comprised in the assembled transport blocks.
  • the transmitting device 100 receives the control message CM and derives the minimum transport block size T Min from the control message CM during the configuration of the service associated with the data packets.
  • the minimum transport block size T Min is not necessarily static during the service execution. Instead, the minimum transport block size T Min can be dynamically updated by the transmitting device 1 00 based on transmission grants TGs from the receiving device 300. For example, if the maximum transport block size T Max of the transmission grants TGs allocated by the receiving device 300 is higher than the minimum transport block size T Min , the transmitting device 100 can increase the minimum transport block size T Min .
  • a couple of solutions to update T Min are described below.
  • the minimum transport block size T Min can be half the size of the minimum of the maximum transport block size comprised in the transmission grants TGs received so far or received in the last N number of TTIs (wherein N could be predefined or flexibly adapted) by the transmitting device 100 as previously described.
  • the transmitting device 100 can use an exponential average of the maximum transport block size comprised in the transmission grants TGs to update the minimum transport block size T Min .
  • the minimum transport block size T Min can be decreased if the maximum transport block size comprised in the transmission grants TGs received by the transmitting device 1 00 are smaller than the minimum transport block size T Min .
  • the minimum transport block size T Min is updated based on a function of one or more transmission grants TGs. Examples of functions have been previously described, such as a linear function or exponential average.
  • the transmitting device 100 may assemble the transport blocks in the link layer and submit the assembled transport blocks to a layer below the link layer for transmission to the receiving device 300.
  • the link layer functions in the transmitting device 1 00 can be implemented using the RLC protocol, which is a link layer protocol used in e.g. LTE and WCDMA. However, the link layer functions can also be implemented using any other known corresponding protocols or future protocols.
  • the RLC protocol receives data packets from higher layers which are assembled into RLC PDUs.
  • the present exemplary RLC protocol can dynamically decide whether concatenation of the higher layer packets should be performed or not.
  • Figs. 5-7 illustrates the assembly of RLC PDUs by the RLC protocol in three different exemplary scenarios in a LTE or WCDMA system context.
  • the higher layer data packets of sizes X1 , X2,..., X6 bytes are short data packets, e.g. for TCP signaling traffic.
  • the higher layer data packets of sizes Y1 and Y2 bytes are e.g. TCP data traffic of a few hundred bytes each.
  • the higher layer data packets of sizes Z1 and Z2 bytes are very long packets, also known as jumbo packets in the art.
  • the RLC PDUs comprises sequence number SN (numbered from k) and the length indicator (LI) as shown in Figs. 5-7.
  • Fig. 5 all the higher layer packets are short data packets of sizes X1 , X2,..., X6 bytes.
  • the RLC protocol therefore concatenates the higher layer data packets of sizes X1 , X2,..., X6 into one RLC PDU as long as the current RLC PDU size stay smaller than or equal to the minimum transport block size T Min .
  • the next to be concatenated short data packet of size X4 did not fit into the current RLC PDU with SN k (shown on the left side of Fig. 5) as otherwise the minimum transport block size T Min would be exceeded.
  • the data packet with size X4 and the following data packets are assembled into the next RLC PDU with SN k+1 .
  • a mixture of short and long higher layer data packets are to be assembled in transport blocks.
  • the minimum transport block size T Min is different for different RLC PDUs implying concatenation flexibility.
  • the three first higher layer data packets of sizes X1 , X2 and X3 are concatenated into the first RLC PDU.
  • the next higher layer data packet of size Y1 is not concatenated with the following higher layer data packet of size Y2 as this concatenation would result in a RLC PDU exceeding the minimum transport block size T Min .
  • the higher layer data packet of size Y1 is therefore assembled in a single separate RLC PDU since the size of data packet Y1 is less than the maximum transport block size T Max .
  • the higher layer data packet of size Y2 is concatenated with the following shorter higher layer data packet of size X4 into the third RLC PDU.
  • the RLC protocol does not apply concatenation at all as the higher layer data packet of sizes Z1 , Z2 are larger than the minimum transport block size T Min but smaller than the maximum transport block size T Max .
  • such large higher layer data packets are inserted into a single RLC PDU without concatenation.
  • the size of the higher layer data packet is even larger than the maximum transport block size T Max segmentation of the data packets would be applied so as to fit them into a given RLC PDU.
  • Fig. 8 illustrates dynamic adaption of the minimum transport block size T Min in uplink example at the transmitting device 100.
  • one or more transmission grants TGs are transmitted by the receiving device 300 to the transmitting device 100 during step I I).
  • Each transmission grant TG grants a transmission of one or more transport blocks and indicates a maximum transport block size for such a transmission.
  • each one of the transmission grants TGs can be associated with different consecutive TTIs.
  • the transmitting device 100 receives the transmission grants TGs and derives the maximum transport block size T Max based on at least one of the maximum transport block sizes indicated or comprised in the transmission grants TGs. Further, an updating mechanism for deriving the minimum transport block size T Min is also provided by considering the maximum transport block sizes in the transmission grants TGs according to any of the previously described solutions. Hence, the value of the minimum transport block size T Min is adapted to the values of the maximum transport block sizes comprised in the transmission grants TGs. Therefore, the value of the minimum transport block size T Min can increased or decreased accordingly.
  • Fig. 9 shows a wireless communication system 500 comprising a transmitting device 100 and a receiving device 300 according to embodiments of the invention.
  • the transmitting device 100 is part of a client device 600 and the receiving device 300 is part of a network node 700.
  • Fig. 9 shows an uplink scenario, where data packets are transmitted in transport blocks TBs from the client device 600 to the network node 700.
  • Embodiments of the invention can also be used in a downlink scenario as shown in Fig. 10.
  • the transport blocks TBs are transmitted from the network node 700, which therefore comprises the transmitting device 100.
  • the transport blocks TBs are received by the client device 600 which comprises the receiving device 300.
  • Fig. 11 illustrates different signaling and transmission aspects according to embodiments of the invention.
  • the transmitting device 1 00 transmits data packets to the receiving device 300 in assembled transport blocks TBs as previously described.
  • the receiving device 300 transmits one or more control messages CMs to the transmitting device 100 which derives the minimum transport block size T Min from the one or more control messages CMs. Based on the minimum transport block size T Min , in the one or more control messages CMs, the transmitting device 100 assembles TBs and transmit these TBs to the receiving device 300. Further, the receiving device 300 transmits one or more TGs to the transmitting device 1 00 which updates the value of the maximum transport block size T Max based on the maximum transport block sizes indicated in the one or more TGs. The transmitting device 100 assembles TBs based on the updated maximum transport block size T Max and transmit these TBs to the receiving device 300.
  • FIG. 1 An exemplary structure of the RLC PDU according to an embodiment of the invention is shown in Fig. 1 2.
  • a RLC PDU assembled from two higher layer packets is illustrated with the two dashed arrows.
  • the D/C field indicates if the RLC PDU is a RLC data PDU or a RLC control PDU.
  • the SN field which is the sequence number added by the RLC protocol to each assembled RLC PDU.
  • the first E field i.e. the E field following D/C field or preceding the SN field in Fig. 12
  • the E fields further on in the PDU structure denote if there are more E field and length indicator fields.
  • Fig. 1 An exemplary structure of the RLC PDU according to an embodiment of the invention is shown in Fig. 1 2.
  • the D/C field indicates if the RLC PDU is a RLC data PDU or a RLC control PDU.
  • the SN field which is the sequence number added by the RLC protocol to each assembled RLC P
  • the first E field is set to 1 indicating there are E field and length indicator fields following the SN.
  • the second E field is also set to 1 indicating there are E field and length indicator fields following the current length indicator field.
  • the third E field is set to 0 indicating there are no more E fields and length indicator fields after the current length indicator field.
  • LI1 corresponds to the size of the higher layer data packet 1 and LI2 corresponds to the size of the higher layer data packet 2.
  • the aforementioned client device also denoted as a user device, a User Equipment (UE), a mobile station, an internet of things (loT) device, a sensor device, a wireless terminal and/or a mobile terminal, is enabled to communicate wirelessly in a wireless communication system, sometimes also referred to as a cellular radio system.
  • the UEs may further be referred to as mobile telephones, cellular telephones, computer tablets or laptops with wireless capability.
  • the UEs in the present context may be, for example, portable, pocket-storable, hand-held, computer-comprised, or vehicle-mounted mobile devices, enabled to communicate voice and/or data, via the radio access network, with another entity, such as another receiver or a server.
  • the UE can be a Station (STA), which is any device that contains an IEEE 802.1 1 - conformant Media Access Control (MAC) and Physical Layer (PHY) interface to the Wireless Medium (WM).
  • STA Station
  • the client device 100 may also be configured for communication in 3GPP related LTE and LTE-Advanced, in WiMAX and its evolution, and in fifth generation wireless technologies, such as New Radio.
  • the aforementioned network node also denoted as a radio network node, an access network node, an access point, or a base station, e.g. a Radio Base Station (RBS), which in some networks may be referred to as transmitter, "eNB”, “eNodeB”, “NodeB” or “B node”, depending on the technology and terminology used.
  • RBS Radio Base Station
  • the radio network nodes may be of different classes such as e.g. macro eNodeB, home eNodeB or pico base station, based on transmission power and thereby also cell size.
  • the radio network node can be a Station (STA), which is any device that contains an IEEE 802.1 1 -conformant Media Access Control (MAC) and Physical Layer (PHY) interface to the Wireless Medium (WM).
  • STA Station
  • MAC Media Access Control
  • PHY Physical Layer
  • the network node may also be a base station corresponding to the fifth generation (5G) wireless systems.
  • Any method according to embodiments of the invention may be implemented in a computer program, having code means, which when run by processing means causes the processing means to execute the steps of the method.
  • the computer program is included in a computer readable medium of a computer program product.
  • the computer readable medium may comprise essentially any memory, such as a ROM (Read-Only Memory), a PROM (Programmable Read-Only Memory), an EPROM (Erasable PROM), a Flash memory, an EEPROM (Electrically Erasable PROM), or a hard disk drive.
  • ROM Read-Only Memory
  • PROM PROM
  • EPROM Erasable PROM
  • Flash memory an EEPROM (Electrically Erasable PROM), or a hard disk drive.
  • embodiments of the transmitting device 100 and the receiving device 300 comprises the necessary communication capabilities in the form of e.g., functions, means, units, elements, etc., for performing the present solution.
  • means, units, elements and functions are: processors, memory, buffers, control logic, encoders, decoders, rate matchers, de-rate matchers, mapping units, multipliers, decision units, selecting units, switches, interleavers, de-interleavers, modulators, demodulators, inputs, outputs, antennas, amplifiers, receiver units, transmitter units, DSPs, MSDs, TCM encoder, TCM decoder, power supply units, power feeders, communication interfaces, communication protocols, etc. which are suitably arranged together for performing the present solution.
  • the processor 102 of the transmitting device 100 and the processor 302 of the receiving device 300 may comprise, e.g., one or more instances of a Central Processing Unit (CPU), a processing unit, a processing circuit, a processor, an Application Specific Integrated Circuit (ASIC), a microprocessor, or other processing logic that may interpret and execute instructions.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • microprocessor may thus represent a processing circuitry comprising a plurality of processing circuits, such as, e.g., any, some or all of the ones mentioned above.
  • the processing circuitry may further perform data processing functions for inputting, outputting, and processing of data comprising data buffering and device control functions, such as call processing control, user interface control, or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un dispositif d'émission et un dispositif de réception. Le dispositif d'émission (100) est configuré pour dériver une taille de bloc de transport minimale (TMin) ; assembler des blocs de transport en concaténant séquentiellement des paquets de données ayant une taille inférieure à la taille de bloc de transport minimale (TMin) dans un bloc de transport (TB) tant que la taille actuelle du bloc de transport (TB) est inférieure ou égale à la taille de bloc de transport minimale (TMin), et en insérant chaque paquet de données ayant une taille entre la taille de bloc de transport minimale (TMin) et une taille de bloc de transport maximale (TMax) dans un seul bloc de transport séparé (TB) ; transmettre les blocs de transport assemblés à un dispositif de réception (300). Le dispositif de réception (300) est configuré pour dériver une taille de bloc de transport minimale (TMin), transmettre un message de commande (CM) à un dispositif d'émission (100), où le message de commande (CM) indique la taille de bloc de transport minimale (TMin), recevoir des blocs de transport assemblés comprenant des paquets de données provenant du dispositif d'émission (100) en réponse à la transmission du message de commande (CM). L'invention concerne également des procédés correspondants, un programme informatique et un produit programme informatique.
PCT/EP2016/077271 2016-11-10 2016-11-10 Dispositif d'émission, dispositif de réception et procédés associés WO2018086693A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020224781A1 (fr) * 2019-05-09 2020-11-12 Nokia Technologies Oy Attribution de données dans une communication cellulaire

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US20070171857A1 (en) * 2005-12-22 2007-07-26 Interdigital Technology Corporation Method and apparatus for data security and automatic repeat request implementation in a wireless communication system
AU2013201919A1 (en) * 2007-09-28 2013-04-11 Interdigital Patent Holdings, Inc Method and apparatus for selecting a radio link control protocol data unit size
US20150282007A1 (en) * 2007-09-28 2015-10-01 Interdigital Patent Holdings, Inc. Method and apparatus for generating radio link control protocol data units

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US20070171857A1 (en) * 2005-12-22 2007-07-26 Interdigital Technology Corporation Method and apparatus for data security and automatic repeat request implementation in a wireless communication system
AU2013201919A1 (en) * 2007-09-28 2013-04-11 Interdigital Patent Holdings, Inc Method and apparatus for selecting a radio link control protocol data unit size
US20150282007A1 (en) * 2007-09-28 2015-10-01 Interdigital Patent Holdings, Inc. Method and apparatus for generating radio link control protocol data units

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WO2020224781A1 (fr) * 2019-05-09 2020-11-12 Nokia Technologies Oy Attribution de données dans une communication cellulaire

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