TWI337817B - Data transmission method in mobile communications system - Google Patents

Description

1337817 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an E-UMTS (Evolved Universal Mobile Telecommunications System-^. abbreviation) 'and in particular' A method of improving data transmission efficiency during the delivery of a mobile terminal.

[Prior Art] Fig. 1 shows a network structure of E-UMTS, which can be applied to the related art and the present invention. The E-UMTS system has evolved from the UMTS system, and 3GPP has been prepared to apply to its basic specifications. The E-UMTS system can be classified as LTE (Long Term Evolution, acronym for Long Term Evolution) System

Regarding Fig. 1, the E-UMTS network is divided into an E-UTRAN 20 and an EPC (Evolved Packet Core, abbreviated as Evolved Packet Core)10. The E-UTRAN 20 includes a terminal (User Equipment (UE)): a base station (eNB or eNodeB) 21 and an AG (Access Gateway) 1 (which may also be referred to as " MME/UPE"). The AG 1 1 can be divided into a portion for processing user traffic and a portion for processing control traffic. The AG portion for processing new user traffic and the AG portion for processing control traffic may communicate with each other via a newly defined interface. One or more cells may be present in a single eNodeB (eNB) 21 and one for transmission use. The interface between traffic and control traffic can be used between eNodeBs. 5 1337817 EPC 10 may include an AG 1 1 , a node for user registration of the UE, and the like. Meanwhile, in the UMTS of Fig. 1, an interface capable of distinguishing between E-UTRAN 20 and EPC 10 can be used. An S1 interface can be connected to a plurality of nodes between the eNodeB 21 and the AG 11 (ie, in a multi-to-many manner). The eNodeBs are connected to each other through an X2 interface, and the X2 interface is always adjacent to the mesh network structure. e N 〇de B.

The complex layer of the radio interface agreement between the UE and an inter-network can be divided into three according to the three layers of the open system interconnection (〇SI) reference model well known in the technical field of the communication system. One layer (L11), one second layer (L2), and a third layer (L3). The first layer (L1) uses a physical channel to provide information transmission, and a radio resource control (RRC) layer at the third layer (L3) controls the radio resources between the terminal and the network. To this end, the RR c layer Exchange RRC messages between the terminal and the network. The distributed RRC layer is for arranging the RRC layer in the network nodes such as eN〇deB and AG, or 'only the rrc layer is placed in the eNodeB or in the ag φ. FIG. 2 shows according to various 3GPP radio access network standards. A control plane structure of a radio access interface protocol located between the terminal and the UTRAN. The radio access interface protocol has a horizontal layer including a physical layer, a data key layer and a network layer; and has a vertical plane including a user plane for transmitting data information and a transmission control signal Control - the plane. The protocol layers can be divided into a first layer (L1), a 6 1337817 second layer (L2), and a third layer according to the well-known open system interconnection (0SI) standard model of the communication system technology. The third layer (L3). The layers of the control plane of the radio protocol in Fig. 2 and the user plane of the radio protocol in Fig. 3 will now be described.

The physical layer (the first layer) provides information transmission services to an upper layer by using a physical channel. The physical layer is connected to a media access control (MAC) layer at the upper layer through a transmission channel, and the data between the MAC layer and the physical layer is transmitted via the transmission channel. Data is transmitted via physical channels between different physical layers (i.e., between a physical side of a transmitting side and a receiving side). The MAC layer of Layer 2 provides service to the Radio Link Control (PLR) layer (which is the upper layer) via a logical channel. Layer 2's RLC layer supports reliable data transmission. It should be noted that the RLC layers in Figures 2 and 3 are indicated by dashed lines, because if the RLC function is implemented within the MAC layer and performed by the MAC layer, the RLC layer itself may not need to be present. The layer 2 PDCP layer performs a header compression function that reduces unnecessary control information so that data transmitted by using Internet Protocol (IP) packets (eg, IPv4 or IPv6) can be effectively sent to a relatively high level. Small bandwidth radio (wireless) interface.

A Radio Resource Control (RRC) layer at the very bottom of the third layer (L3) is defined only in the control plane, as well as the control logic channel for configuration, reconfiguration and release of radio bearers (rb). In the transmission channel and the physical channel. Here, RB means a service provided by the second layer (L2) for data transfer between the terminal and the UTR AN. It is used for transmitting data from the network to the downlink transmission channel of the terminal, including a broadcast channel (BCH) for transmitting system information, and a channel for transmitting user traffic or control messages. Chain 7 1337817 shared channel (referred to as SCH) «downlink multicast, broadcast service traffic or control messages can be transmitted through the downlink channel S c Η, or through a separate downlink channel multicast channel (multicast channel , referred to as MCH) transmission. An uplink transmission channel for transmitting data from the terminal to the network, including a random access channel (raCH) for transmitting initial control messages, and a channel for transmitting user traffic or The uplink key SCH of the control message. In the related art, when a terminal and a base station communicate with each other in a data unit, one of the terminals or the base station performs a reordering process to transmit the data unit (i.e., Sdu) in sequential order. However, if the terminal moves to a new base station (ie, when a delivery occurs), and the terminal transmits one or more uplink data units to a particular base station, the particular base station stops transmitting for a period of time. The received data unit is sent to an upper node (ie, a gateway) to receive one or more data units that have not been received by the particular base station (ie, the data system is transmitted to a new base station). Since the specific base station cannot decide whether the new base station properly receives the data unit that has not been received by the special base station, the time of transmission of a data unit will be delayed because the specific base station must wait for the reception to be received by the new base station. *1 data unit 'and unnecessary use of buffers in a specific base station ^ because a particular base station does not sequentially transmit a received data sheet to a higher node 6 in a certain period of time in the related art, in its own right When the terminal transmits the subscribed link data unit to the gateway and is submitted by the terminal, the terminal will have the disadvantage of the inefficient data unit. 8 1337817 SUMMARY OF THE INVENTION An exemplary feature of the present invention is to provide a method of improving the transmission efficiency of uplink data of a handover procedure of a mobile terminal.

In order to implement at least the above features in whole or in part, the present invention provides a method for transmitting data in a mobile communication system, the method comprising: when a mobile terminal performs delivery, a base station transmits a data unit related to reordering The information is sent to a gateway that reorders the data units received from one or more of the base stations based on the information related to the reordering. The data unit can be a radio link controller (RLC) service data unit (SDU). The reordering related information can be transmitted through a messaging message generated between the RLC layer of one of the base stations and a PDCP layer of the gateway. The message may be a reordering indication information. The reordering indication information can be a one-way message or a two-way message.

The reordering related information may be transmitted or received via at least one of an RLC generating data unit, a single bit, and one of the RLC header columns. The base station can be a source base station or a target base station. The base station can transmit a receiving data unit that is received prior to delivery, regardless of the order number of the gateway. The reordering process of the data unit can be performed by one of the PDCP layers of the gateway or one of the lower layers of the PDCP layer, and the transmission data unit from the terminal can be stored in the reordering buffer of the gateway. 9 1337817 [Embodiment] An aspect of the present invention relates to the knowledge of the inventors of the above related art, and is further explained later. Features of the present invention have been developed based on this recognition. Although the invention has been shown to be implemented in a mobile communication system (such as UMTS developed under the 3GPP specifications), the invention may also be applied to different standards.

Other communication systems that operate in accordance with specifications. As network technology continues to evolve, it is foreseeable that RNC may no longer be needed in future networks because node b with enhanced capabilities, or other types of network entities (such as so-called access gateways) can be processed by existing RNCs. The operation performed. This long-term evolutionary issue further supports the need to develop and improve radio admission control technology, which will be used to accommodate new terminals (or establish new user links) and support new services developed by a large number of terminals managed by the network. .

In July, an uplink method for transmitting a mobile terminal's delivery procedure was improved; Gp when the terminal is connected from a first radio network section: (the mobile terminal is currently connected) to a second radio network node, "far first radio copper beta ', 'point or The second radio network node may transmit a sorting indication for one or more of the data to the first gate (or different network entities), and one or most of the previous ones The terminal receives the responsibility of 7L transmission to the gateway it f # JL - ^ 咚' regardless of the number of data units, thus optimizing the transmission efficiency of the Bellow. The first radio network ridge may be a base station node source eNB, and the 10 1337817 mobile terminal is connected to the base station node source eNB to receive the service; and the first radio network node may be a The base station node target eNB, the action 缟 will move to the base station node target e NB to receive a service β. The present invention provides a method for performing a reordering process of a data unit (ie, SDU). The data unit is implemented by a terminal. At the time of delivery, the terminal transmits through the base station. That is, during the delivery, when the data unit is transmitted from the terminal to the upper node (ie, the gateway) through the base station, the base station can transmit any received data unit from the terminal to the order without considering the order of the data unit. The gateway, and the gateway can reorder the received data units from the base station in sequential order. Specifically, the source base station can transmit a reordering indication message (or other type of signaling) to the gateway to perform a reordering process by the gateway. The reordering indication message may be transmitted to the gateway before the terminal is to be delivered or during the terminal delivery, and the reordering indication message may be transmitted from the source base station or the target base station. The data unit may represent a data block that will be transmitted from a particular agreement (or node) to an upper agreement (or node). The data unit can be a Service Data Unit (SDU) of one of the Radio Link Control (RLC) entities. The base station may also transmit the message to the gateway in the form of a single bit or by performing a reordering process by including a message in the header column of R L C . After knowing that the gateway will perform the reordering process, the base station will not consider the sequence number of the data unit. In other words, if the gateway is to be reordered, the base station itself will no longer perform the reordering process. Just as any uplink data unit received from terminal 11 1337817, the base station can immediately transmit the received uplink data unit to the gateway regardless of the order of the data units (i.e., the number of sequences). For example, when the RLC of the base station completely receives a specific order of the SDUs by receiving the pDUs from the lower layer, the RLC immediately transmits the received SDUs to the upper layer (i.e., the gateway) regardless of the order of the SDUs. Here, the SDU transmitted to the gateway can also be received by one of the upper layers of the RLC (i.e., PDCP).

When the gateway receives data units from the base station, the data units are not always received in sequential order. At the same time, the gateway can be received not only from a single base station but also from a plurality of base stations. The gateway can store the received data units (unordered data units) in a reorder buffer to transfer the received data units to the upper layer (or nodes) in sequential order. Similarly, the gateway can transmit the data unit to the upper layer (or node) after all unreceived data units are received by the gateway and when the sequential order of the data units is completed.

For example, the RLC of the base station can transmit the SDU to the gateway, and the PDCP layer of the gateway can receive the SDU from the base station. Here, the received SDUs may not be in the order of order. Similarly, even if the S D U originates from a terminal transmission, the gateway can receive the SDU through the plurality of base stations. The PDCP layer of the gateway or a lower layer under the PDCP of the gateway can store the SDUs in a reordering buffer to form the SDUs in sequential order. The PDCP layer of the gateway can transmit the SDU to an upper layer (or node) whenever any sequential order of SDUs is completed. Figure 4 shows the delivery procedure between exemplary eNodeBs. First, the source eNodeB can exchange area restriction information 12 1337817 (S 1 0) with the 〆 access gateway (AG) or MME/UPE. Here, the area restriction information may be included in a UE context.

The source eNodeB may transmit a radio resource measurement status to the UE (hereinafter referred to as "terminal") (S 1 1 ), and the terminal may transmit the result of the radio resource measurement to the source eNodeB according to the received radio resource measurement status (S 1 2). The source eNodeB may transmit a delivery (HO) request message to the target eNodeB (s丨3, S14) after making a decision to connect to a neighboring base station (or cell) based on the received radio resource measurement result from the terminal. . The target eNodeB·5!" determines whether to accept the HO request message based on the radio resource of the target eNodeB (S 15). If the HO request message is accepted, the target base station may transmit a HO response message to the source eNodeB (S 16), and then the source eNodeB may transmit a HO command to the terminal (S17).

The terminal receiving the HO command can perform a message to connect the target eNodeB with a layer 1 (L1) and a layer 2 (L2) hierarchy. This L1/L2 call can include a synchronization process. When the L1 and L2 connections are terminated, the terminal can transmit a HO completion message to the target eNodeB (S1 9), and the target eNodeB can transmit a HO completion message to the gateway (AG) (or MME/UPE) (S20). The AG receiving the H0 completion message may transmit a HO Complete ACK message to the target eNodeB (S 2 1 ), and the target eNodeB may transmit a resource release message to the source eNodeB (S 2 2). Thereafter, the source eNodeB receiving the resource release message can release all the relevant radio resources and the terminal can update the location (S 2 3 ' S24) ° Figure 5 shows the method of transmitting the uplink data unit in the mobile communication system. 13 1337817

As shown in Fig. 5, during the delivery, when the terminal transmits the data unit in the uplink, the source eNodeB and the target eNodeB may not perform the -reordering process, and the reordering process may be performed by the gateway. Therefore, the request can receive uplink data units from the source eNodeB and the target eNodeB, which are transmitted from one or more terminals, and then perform a reordering process. The data unit can be stored in the reordering buffer of the gateway (the ellipse in AG in Figure 5). The reorder buffer can be located in the PDCP of the gateway or in a functional block of the lower layer under PDCP. Figure 6 shows the method of transmitting a data unit from the RLC to the gateway from the RLC of the data unit mobile terminal (e.g., SDU) to the base station. The R L C is located above the MAC of the base station in the E-UTRAN. The RLC can generate an SDU from a receiving SDU. In Fig. 6, "Sj represents an SDU, "P" indicates that PDU' "sNB" indicates a source eNodeB, and "tNB" indicates a target eNodeB.

In general, the RLC may not receive the pDUs in sequential order, and the receiving SDUs by the eNode B may not be in sequential order. In Figure 6, "S60", "S61", "S64" and "S65" can be regarded as fully received SDUs, because the corresponding PDUs have been completely received to generate sdu. However, "S62" and "S63" are not Complete reception 'because the corresponding pDu is not completely received. Thus, if no delivery is made, the terminal may remain attempting to retransmit the P D U to the source base station (sMB) and the gateway will receive the SDU by receiving the PDU through the source base station. However, if a delivery is made, the terminal can pass the pDU to the target base station (t N B) instead of the source base station. Therefore, during the delivery period, even if the source base station does not receive the specific pDU' target base station, it can produce 14 1337817 specific S D U. In Fig. 6, the target base station can generate "S62" and "S63" by receiving the corresponding PDUs of "S62" and "S63". Here, the source base station may not know whether the target base station receives "S62" and "S63". Just as the source base station may request retransmissions of "S62" and "S63" in the order of the SDUs, and it may cause unnecessary time delays.

Therefore, if the gateway can receive the S DU from the complex base station, the reordering process performed by the gateway may be more efficient than performing the reordering process in the base station (sNB, tNB) during the delivery. Here, if the full reception is confirmed, the source base station can immediately transmit "S 60", "S61", "S63" and "S64" to the upper node (gateway). If each SDU is completely received, the target base station can immediately transmit the SDU (ie, "S62" and "S63") to the gateway, or the target base station can sequentially transmit the SDU after performing the reordering process by the base station itself (ie, "S62" and "S63"). Figure 7 shows an exemplary data flow for the reordering process between the eNodeB and the A G for the uplink data unit.

The base station can determine whether the terminal needs to be submitted by receiving measurement information from the terminal. If the terminal needs to perform delivery (as shown in Fig. 8), the base station can transmit a reordering indication message to the gateway to perform the data unit reordering process (S30) by the gateway. The reordering indication message can be a one-way message or a two-way message (S 3 1). The reordering indication message may be a messaging message that can be generated between the base station and the gateway. Similarly, a request to perform a reordering function may be included in a data unit or in a certain information shed of other messaging messages. 15 1337817 For example, when preparing for delivery, the RLC of the base station may not perform the reordering function, and a request for a reordering process may be sent to the gateway through a messaging message. Similarly, the base station can indicate (or set) whether the reordering function needs to be performed by the gateway by using a message or signal in a column of the RLC or MAC. In addition, the base station can continue to perform the reordering process and allow the gateway to perform an alternate-reordering process. Xiaozhan can be based on

The reordering instruction of the base station transmits the uplink data unit after the reordering process of the data unit is performed. Figure 8 shows an exemplary data flow for the downlink data unit transmission between 61 and 8, and the reordering process between UEs. As shown in Fig. 8, the base station transmits not only the reordering indication transmitted by the uplink data unit but also the downlink data unit transmission reordering indication message (S40). In this case, the 'reordering indication message' may be a one-way message or a two-way message (S41).

The reordering indication message may indicate how the terminal performs the reordering process. The base station may request a reordering process in the PDCP layer of the terminal by generating a reordering indication message. Here, the PDCP layer of the terminal can perform the reordering process by a P D C P sequence number. When the reordering process of the p D C P layer is performed, the reordering process by the RLC layer may not be performed. However, the ordering process by both the PDCP layer and the RLC layer can be performed together for downlink data unit transmission. The reordering indication message may include information to determine whether the reordering process by the RLC layer must be continued, or information that must be reordered by the RLC layer. The reordering indication message may be a message generated in a Radio Resource Control (RRC) entity of the 16 1337817 in the base station. When the rlC SDU is generated during the transmission of the downlink data unit, the reordering indication message can be transmitted with the information including the reordering function of the associated PDCP and RLC. Figure 9 shows an exemplary E-UTRAN protocol architecture for uplink data unit transmission. As shown in Figure 9, 'presenting the wireless interface protocol as a PDCP layer'

An RLC layer, a MAC layer, a +-PHY layer, and the like. In contrast to the rlC layer and the PDCP layer of the terminal, the RLC layer and the PDCP layer of the E-UTRAN are located in different network nodes such as an eNodeB and an access gateway (A G), respectively. Wireless interface protocols are interrelated with each other. For example, the RLC layer of the base station and the PDCP layer of the gateway are associated with each other, and the communication message generated in the S1 interface can be used for data transmission and control between the two layers. Here, the generated messaging message can be used to transmit a reordering indication message to the gateway. Similarly, an NBAP message defined in the lub interface can be used to transmit the reordering indication message. The reordering indication message may be included in a Service Data Unit (SDU) generated by the RLC or in the header of the RLC. The reordering indication message can be represented by a single bit to minimize the amount of traffic sent. Figure 10 shows an exemplary E-UTRAN protocol architecture for downlink data unit transmission. As shown in Fig. 10, both the RLC layer of the terminal and the PDCP layer of the terminal can perform the reordering function at the same time. Similarly, one of the R L C layers of the terminal or the PDCP layer of the terminal can perform the reordering function. If the terminal applies a reordering process in the pDCP layer, then the reordering indication message can include a request for the reordering process in the PDCP layer. 17 1337817

If the terminal decides to perform a delivery procedure, the base station can transmit a reordering indication message. The terminal may receive the downlink data unit from the gateway in accordance with the reordering function according to the order of the transmission data unit during the delivery procedure. If the delivery process ends, the reordering process by the PDCP layer is no longer needed, so the base station can transmit a delivery completion message or a request message for termination of the reordering function to the terminal, and then when receiving the message, The terminal can terminate the reordering function by the PDCP layer. The reordering process by the PDCP layer can be performed in a layer between the PDCP layer and the RLC layer. In this case, the layer is positioned under the P D C P layer and on the R L C layer. Similarly, if it is an uplink data unit transmission, the reordering process can be performed under the PDCP layer of the gateway.

The present invention provides a method for receiving uplink data in a mobile communication system, the method comprising: deciding to perform a delivery for a terminal; and transmitting an indication to an access gateway when the delivery is required to be performed in accordance with the determining step (AG) to allow the AG to perform uplink data reordering upon receiving the indication; wherein the indication generates a Service Data Unit (SDU), a single bit, and a header of the RLC via an RLC At least one of the columns is transmitted to the AG; wherein the indication is defined by a Packet Data Convergence Agreement (PDCP) layer at one of the base station radio link control (RLC) layers and an access gateway (AG) One of the messages is received; wherein the indication is a one-way message or a two-way message; wherein the indication is a reordering request message. At the same time, the present invention provides a method for receiving downlink data in a mobile communication system, the method comprising: receiving downlink data from one or more base stations; receiving one of the base stations when performing a delivery 18 1337817

Reordering indication; performing downlink material reordering after receiving the reordering indication; and transmitting a reordering acknowledgement after receiving the reordering indication; wherein the downlink data reordering is by one of a terminal a header compression entity processing; wherein the reordering indication is a one-way message or a two-way message; wherein the reordering indication generates the service data unit, a single bit, and at least one of the RLC headers via an RLC Receiving, wherein the reordering indication is generated by one of the one or more base stations, a radio resource control (RRC) layer; wherein one of the base stations is a source base station or a target base station.

Meanwhile, the present invention provides a method for transmitting communication data in a mobile communication system, the method comprising: transmitting an indication from a first node to a second node when performing a delivery; communicating communication between the first node and the second node Data; and when receiving the data, performing, by the second node, a reordering process of the data; wherein the second node comprises a header compression entity; wherein the first node is a base station and the second node is a terminal or an access channel (AG); wherein the uplink data reordering is performed by one of the header compression entities of the AG or by a lower layer of the header compression entity in the AG; The AG includes a reordering buffer to store uplink data for uplink data reordering. Further, the present invention provides a mobile terminal for receiving downlink data in a mobile communication system, the mobile terminal comprising: a lower layer protocol entity adapted to receive an indication from a base station when delivery is performed; A header compression entity on the lower layer entity that is adapted to perform a reordering process for downlink data when the indication is received. Although the present invention is described in the context of mobile communications, the present invention can also be applied to any wireless communication system using mobile devices, such as PDAs and laptops equipped with wireless communication capabilities (i.e., interfaces). Moreover, the use of certain terms describing the invention is not intended to limit the scope of the invention to a particular type of wireless communication system. The present invention is also applicable to other wireless communication systems using different air interfaces and/or physical layers, such as TD Μ A, CDMA, FDMA, WCDMA, OFDM, EV-DO, Wi-Max, Wi-Bro exemplary implementations. Examples may be implemented as methods, apparatus, or articles of manufacture using standard stylization and/or engineering techniques to produce software, firmware, hardware, or any combination thereof. The term "article of manufacture" as used herein refers to hardware logic (such as integrated circuit chips, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), etc.), or a computer. Read media (such as magnetic storage media (such as hard disk drive 'floppy, tape, etc.), optical storage (CD-R Μ Μ, CD-ROM, etc.), volatile and non-volatile memory devices (such as EEPROM, ROM, Code or logic implemented in PROM, RAM, DRAM, SRAM, firmware, programmable logic, etc., may be accessed and executed by a processor. The exemplary embodiments are implemented as The code can be further accessed through a transmission medium or from a file server on the network. In this case, the code can be implemented to include a transmission medium (such as a network transmission line) and a wireless transmission medium. , signals transmitted through space, radio, leather, infrared signals, etc. Of course, those skilled in the art will recognize that many modifications of this configuration can be made without departing from the scope of the invention, and that the article of manufacture Can contain 20 1337817

Any information bearing media known in the art. References to "a specific embodiment", "an example embodiment" or the like in this specification means that a particular feature, structure, or feature is described in connection with the specific embodiment. in. Such phrases appearing throughout the specification are not necessarily all the same specific embodiments. Furthermore, a particular feature, structure, or singularity of the specific embodiment is described as being within the scope of the features, structures, or particulars of the invention. While the invention has been described with reference to the specific embodiments thereof, it will be understood by those skilled in the art To be more specific, various variations and modifications are possible in the component parts and/or combinations of the subject combinations in the scope of the disclosure, the drawings and the scope of the claims. In addition to changes and modifications in the component parts and/or aspects, those skilled in the art will also understand alternatives. The present invention may be embodied in a number of forms without departing from the spirit and scope of the invention. Changes and modifications within the spirit and scope of the application, and therefore the equivalents of such measurement and limitation, should be covered by the scope of the patent application. The specific physical indications of the physical system are subject to the spirit of the application of the spirit of the application, 8 has been set up or the application of the application has changed 21 1337817 [Simplified schematic] Some exemplary embodiments will be used by The similar reference numerals in the drawings represent similar elements. The first figure shows the exemplary network structure of the UMTS and the mobile communication system to which the present invention is applied. Figure 2 is based on the 3GPP wireless access network specification.

UTR rotten (four) electrical interface ^ (four) flat (four) exemplary third figure is based on the 3GPP wireless access network specification in the singular _ 1 (four) mediated (four) stipulation of the ^ plane 第 display example 5 The figure shows the method of action. Submit order between eModeBs. Transmission uplink in the communication system

Figure 6 shows the transmission of the data unit from a terminal to a base RLC' and then transmits the received data unit from rlc to a gateway. Figure 7 shows the example of the reordering process between the uplinks for the uplink data unit. Data stream. Figure 8 shows an exemplary data flow for the reordering process between downlinks in the downlink data unit. Figure 9 shows an example E-UTRAN protocol architecture for the uplink data transmission. Figure 10 shows the E-UTRAN protocol architecture for downlink data unit transmission. As far as the description is concerned, it is related to a technology-end and a structure. . End and sexual structure. Data unit method of the base β eNodeB and an eNodeB and an indication _·] indication [main symbol description] 22 1337817

10 Evolution Packet Core/EPC 11 Access Gateway/AG 20 E-UTRAN 2 1 Base Station / eNB / eNodeB P PDU S SDU sNB Source eNodeB tNB Target eNodeB

twenty three

Claims (1)

1337817 X. Patent application scope: 1. A method for receiving uplink data in a mobile communication system, the method comprising: determining to perform a delivery for a terminal; and when performing the delivery according to the determining step, The indication is transmitted to an Access Gateway (AG) to allow the AG to perform uplink data reordering upon receiving the indication. 2. The method of claim 1, wherein the indication is generated by a RLC (Radio Link Control), a Service Data Unit (SDU), a single bit, and At least one of the headers of one of the RLC messages is transmitted to the AG. 3. The method of claim 1, wherein the indication is via a packet data convergence protocol (Packet) at one of the base station radio link control (RLC) layers and the access gateway (AG). The Data Convergence Protocol (PDCP) defines one of the layers to receive message reception. 4. The method of claim 1, wherein the indication is a one-way message or a two-way message. 5. The method of claim 1, wherein the indication is a reordering request message. 24 1337817 - A method for receiving downlink data in a mobile communication system, the method being performed by a terminal and comprising: receiving the downlink data from one or a plurality of base stations; when performing a delivery, Receiving a reordering indication from one of the base stations, and performing downlink data reordering after receiving the reordering indication, wherein the downlink data reordering is performed by one of the header compression entities in the terminal. 7. The method of claim 6, wherein the reordering indication is a one-way message or a two-way message. 8. The method of claim 6, wherein the reordering indication is received via an RLC to generate a service data unit, a single bit, and at least one of a header column of an RLC message. 9. The method of claim 6, wherein the reordering indication is generated by one of the one or more base stations, a Radio Resource Control (RRC) layer. The method of claim 6, wherein one of the base stations is a source base station or a target base station. 1 1. The method of claim 6, further comprising: transmitting a reordering confirmation message when receiving the reordering indication at 25 1337817. 1 2 - a method for communicating data in a mobile communication system, the method comprising: transmitting an indication from a first node to a second node when performing a delivery; And communicating, by the second node, a reordering process for the data, wherein the second node includes a header compression entity. The method of claim 12, wherein the first node is a base station and the second node is a terminal or an access channel (AG). The method of claim 13, wherein the uplink data reordering is performed by one of the header compression entities of the AG or by the header compression entity in the AG. The next layer of processing. 15. The method of claim 13 wherein the AG comprises a reordering buffer to store uplink data for uplink data reordering. 1 6. A mobile terminal for receiving downlink data in a mobile communication system, the mobile terminal comprising: 26 1337817 a lower layer agreement entity adapted to receive a reordering indication from a base station when a delivery is performed; and a header compression entity on the lower layer entity adapted to receive when the lower layer entity receives At the time of the indication, a reordering process for the downlink data is performed. 27