CN102761490B - A base station, a mobile station and a radio communication system - Google Patents

A base station, a mobile station and a radio communication system Download PDF

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CN102761490B
CN102761490B CN 201210251351 CN201210251351A CN102761490B CN 102761490 B CN102761490 B CN 102761490B CN 201210251351 CN201210251351 CN 201210251351 CN 201210251351 A CN201210251351 A CN 201210251351A CN 102761490 B CN102761490 B CN 102761490B
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base station
packet
mobile station
station
received
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CN102761490A (en )
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太田好明
田岛喜晴
大渕一央
河崎义博
田中良纪
杉山胜正
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富士通株式会社
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Abstract

一种基站、移动站及无线通信系统。 A base station, a mobile station and a wireless communication system. 移动站的特征在于,该移动站从如下的移动目的地基站接收序列号,该移动目的地基站是将从移动源基站接收到的序列号用作从上级站接收到的分组的序列号的基站。 Characterized in that the mobile station, the mobile station receives the following from the sequence number of the target base station, the target base station is a base station from the serial number of the source base station the received sequence number as received from the host station to the packet .

Description

基站、移动站及无线通信系统 A base station, a mobile station and a radio communication system

[0001 ] 本申请是原案申请号为200780052592.X的发明专利申请(国际申请号:PCT/JP2007/059037,申请日:2007年4月26日,发明名称:基站、移动站、通信系统、发送方法及重排序方法)的分案申请。 [0001] The present application is a continuation of the original bill Application No. 200780052592.X patent application (International Application Number: PCT / JP2007 / 059037, filed: April 26, 2007, title of the invention: a base station, a mobile station, a communication system, the transmission method and reordering method) of the divisional application.

技术领域 FIELD

[0002] 本发明涉及基站、移动站及无线通信系统。 [0002] The present invention relates to a base station, a mobile station and a wireless communication system.

背景技术 Background technique

[0003]目前,移动电话等移动通信系统开始了基于CDMA方式的第三代方式下的业务,不过在3GPP (第三代合作伙伴计划)下,已经展开关于可进行更高速通信的下一代移动通信系统(LTE:Long Term Evolut1n:长期演进)的讨论(非专利文献I)。 [0003] Currently, mobile phones and other mobile communications systems at the beginning of the third generation CDMA-based way of business, but in the 3GPP (Third Generation Partnership Project), has launched the next generation of higher-speed mobile communication can be carried out on discussed (Non-patent Document I) of a communication system (long Term Evolution LTE:: long Term Evolut1n). 说到这里,除了传输速率的高速化之外,削减传输延迟也是重大的课题。 Here, in addition to the high-speed transfer rates, reduce transmission delay is a major issue.

[0004] 为了使传输速率高速化并削减传输延迟而进行了这样的研究,即:在LTE通信系统中,与以往的系统相比,实现了切换(Hand Over)方法的高度化。 [0004] In order to speed up the transmission rate and reduce transmission delay is performed such studies, namely: the LTE communication system, compared with the conventional system, a switch (Hand Over) method sophistication. 在移动通信中,当移动站在通信中移动时,会根据接收状态而发生进行通信的基站的转换(切换)。 In mobile communication, when the mobile station moves in the communication, based on a reception state occurs converting the base station communication (handover). 因此,对于高速/低延迟通信而言,实现切换的高度化是必不可缺的。 Thus, for high-speed / low delay communications, to achieve switching sophistication is indispensable. 在LTE通信系统中,以分组交换系统为基本,因此切换(Hand Over)就成为Hand Hand Over。 In the LTE communication system, a packet switching system substantially, thus switching (Hand Over) has become Hand Hand Over. 在Hand Hand Over中,在切断了移动站与移动前进行通信的基站之间的线路连接后,进行移动站与移动目的地基站之间的线路连接。 In Hand Hand Over, the cut line between the mobile station and a base station for mobile communication before connection, a line between the mobile station and the target base station is connected. 在Hand Hand Over中,由于在即将进行切换之前得到了移动目的地基站的系统信息,因此能够短时间地进行切换,但在切换中会发生用户数据的传输中断状态。 In Hand Hand Over, due to obtain system information of the target base station immediately before the handover, it can be switched in a short time, but the transmission of user data in the handover will occur interrupt status.

[0005] 因此,为了减小传输延迟,尤为重要的是,缩短传输中断状态以及防止传输中断过程中分组的缺失。 [0005] Accordingly, in order to reduce transmission delay is particularly important, reduce transmission interruption state and to prevent deletion during packet transmission is interrupted. 一旦在传输中断过程中发生了分组缺失的情况下,需要通过端到端的分组重新发送来进行恢复,因此传输延迟变大。 The occurrence of a case where the missing packet transmission interrupt process at once, it is necessary to recover the packets resent by the end, so transmission delay becomes large.

[0006] 另外,在LTE通信系统的切换中,将如下方法标准化,所述方法是:通过从移动源基站向移动目的地基站转发包含发给移动站的控制信息和分组在内的数据中的、未从该移动源基站传输到移动站的分组,由此来进行交接(非专利文献2)。 [0006] Further, in a handover in a LTE communication system, a method will be standardized, the method is: by forwarding from the source base station to the target base station comprises control information and the packet data addressed to the mobile station in the inner , not transferred from the source base station to the mobile station of a packet, thereby performing the handover (Non-Patent Document 2).

[0007].切换时的交接 [0007] Handover during handover

[0008] 图21是切换时的交接说明图。 [0008] FIG. 21 is an explanatory view when the transfer switch. 在图21 (A)中,两个基站la、lb与上级站(例如MME/SAE网关)2连接。 In FIG. 21 (A), two base stations la, lb and the superordinate station (e.g. MME / SAE Gateway) 2 are connected. 移动站4存在于基站Ia的小区3a内,当前正在与基站Ia进行通信。 The mobile station 4 exists within the cell 3a of the base station Ia, the base station currently communicating with Ia. 在该状态下,如图21 (B)所示,当移动站4朝基站Ib的方向移动并进入到小区3b内时执行切换,移动站的通ί目基站从基站Ia切换到基站lb。 In this state, in FIG. 21 (B), when the direction of the mobile station 4 moves toward the base and into the Ib ί mesh through the base station performs handover of the mobile station within a cell handover from the base station 3b to the base station Ia lb. 其中,将切换如正在进彳丁通彳目的基站称为移动源基站(源基站),将切换后进行通信的基站称为移动目的地基站(目标基站)。 Wherein the handover is in progress such as the left foot base object referred to as a left foot butoxy through the source base station (source base station), the base station will be referred to a communication target base station (target base station) after the handover.

[0009] 移动源基站Ia将从上级站2接收到的分组保存在内置缓存器中,并向移动站4依次发送保存在该缓存器中的分组。 [0009] Ia from the source base station to the host station 2 receives the packets stored in the built-in buffer, and the mobile station sequentially transmits packet 4 stored in the buffer. 因此,在发生切换时,存在存储在缓存器中而尚未发送给移动站的分组。 Thus, when switching occurs, there is stored in the buffer and not yet transmitted packets to the mobile station. 在图21 (B)中,在缓存器中存储有切换前接收且未向移动站发送的分组n-2〜n,需要在切换后将这些分组从移动目的地基站Ib发送到移动站4。 In FIG. 21 (B), it is stored in the buffer without sending the packet received before the handover to the mobile station n-2~n, these will need to switch packets transmitted from the target base station to the mobile station 4 Ib. 因此,在切换序列执行时,移动源基站Ia将分组n-2〜η转发(forwarding)给移动目的地基站lb。 Thus, when the switching sequence execution, Ia source base station forwards the packets n-2~η (Forwarding) to the target base station lb. 通过使用这种转发方法,移动目的地基站Ib在切换之后立刻向移动站4发送该分组,因此不会发生分组中断。 By using this forwarding method, the target base station immediately transmits the packet Ib to the mobile station 4 after the handover, so the packet interruption. 所以,不会发生端到端的分组重新发送,能够执行高速的切换。 Therefore, end packet retransmission does not occur, capable of performing high-speed switching. 另外,上述n-2〜η是表示分组顺序的编号(序列号)。 Further, the n-2~η is a packet sequence number (sequence number).

[0010].切换 [0010] The switching

[0011] 图22是LTE通信系统的切换说明图,图23是LTE通信系统中目前设想的切换步骤说明图。 [0011] FIG. 22 is an explanatory view of handover in the LTE communication system, FIG. 23 is a LTE communication system handover procedure currently envisaged in FIG.

[0012] 移动站4通过测定报告(Measurement Report)(来自基站I和周边基站的接收状况报告)向移动源基站I通知需要进行切换HO (Hand Over) (1.测定控制)。 [0012] 4 by the mobile station a measurement report (Measurement Report) (receiving a status report from the base station and surrounding base stations I) to the source base station informs the I required to be switched HO (Hand Over) (1. measurement control).

[0013] 移动源基站I根据测定报告的内容来确定目标基站Ib (2.HO目的地确定),并向该移动目的地基站Ib发送切换请求(3.HO请求)。 [0013] I source base station is determined according to the content of the target base station a measurement report Ib (2.HO destination is determined), and sends a handover request (3.HO request) to the target base station Ib. 此时,移动源基站Ia还发送移动站的信息(移动站ID和QoS (Quality of Service:服务质量)信息等)等。 At this time, the source base station also transmits information Ia of the mobile station (mobile station ID and QoS (Quality of Service: Quality of Service) information, etc.) and the like. 移动目的地基站Ib根据这些信息来进行呼叫接入控制(4.呼叫接入控制)。 Ib to the target base station a call admission control (4. Call Admission Control) based on this information.

[0014] 当移动目的地基站Ib允许接入移动站时,向移动源基站回复切换响应(5.HO响应)。 [0014] When the target base station the mobile station allowed to access the Ib, return a handover response (5.HO response) to the source base station. 然后,移动源基站Ia向移动站4发出切换指示(6.HO指示),并在此前后开始(分组转发:forwarding)数据(分组)的交接。 Then, the source base station issues a handover indication Ia (6.HO indication) to the mobile station 4, and starts (packet transfer: forwarding) Before and after the transfer of data (packets).

[0015] 接收到切换指示的移动站4通过L1/L2信令来确保与移动目的地基站Ib保持同步(7.同步确保),在确保了同步后,向移动目的地基站Ib发送切换完成的报告(8.HO完成)。 [0015] The mobile station 4 receives the handover indicated by the L1 / L2 signaling to ensure that the target base station Ib sync (synchronization ensures 7), to ensure the synchronization, transmits a handover complete to the target base station (Ib) report (8.HO completed).

[0016] 由此,移动目的地基站Ib将切换完成的报告发送给上级站2 (9.HO完成)。 Report [0016] Accordingly, the target base station transmits a handover complete Ib to the upper level station 2 (9.HO completion). 上级站2在接收到切换完成的报告时,将分组传输路径从移动源目的地Ia切换到移动目的地基站Ib (10.路径切换),并向移动目的地基站Ib回复HO完成响应(11.HO完成响应)。 When the host station 2 receives the handover complete report, the packet transmission path is switched from the source to the destination of the target base station Ia Ib (10. Path switching), HO completion response to the reply (the target base station 11 Ib. HO completion response). 移动目的地基站Ib根据HO完成响应而向移动源基站Ia通知切换HO已经完成(12.资源释放)。 The target base station according to the HO completion response Ib and Ia notifies handover to the source base station HO is completed (12. Resource release). 之后,消除移动源基站Ia与上级站2之间的路径(13.资源释放)。 Thereafter, the cancellation path (13. Resource release) between the source base station and the superordinate station Ia.

[0017].分组的顺序匹配控制 [0017] The order of packets matching control

[0018] 在上述切换序列执行中,当发生分组转发(forwarding)时,在移动目的地基站Ib中,可能由于从上级站2进入的分组而导致该转发来的分组发生跳跃,从而导致序列号紊乱。 [0018] In the execution of handover sequence, when the packet transfer occurs (Forwarding), Ib in the target base station, it may be because the incoming packets from the host station 2 resulting in the packet forwarded by the jump occurs, resulting in SEQ ID NO disorder. 如果移动目的地基站Ib是在序列号紊乱的状态下向移动站4转发分组,则移动站不能按正确顺序接收到分组,因此通信质量恶化,结果导致在切换前后无法实现高质量的通信。 If the target base station in a state where Ib is forwarded to the serial number of the mobile station 4 disordered packets, the mobile station can not receive the packets in the correct order, so that the communication quality is deteriorated, resulting in high quality communications can not be achieved before and after the handover.

[0019] 在此,对于LTE通信系统而言,在基站和移动站中利用如下方法来保持分组的顺序匹配性。 [0019] Here, for the LTE communication system, to maintain the order of packets by matching method in which a base station and a mobile station. 图24是该分组的顺序匹配的说明图,移动目的地基站Ib相比于从上级站接收到的分组优先传输从移动源基站Ia转发来的分组,由此来保持分组的顺序匹配性。 FIG 24 is a diagram illustrating the order of the packet matches, Ib compared to the target base station received from the host station to the priority packets transmitted from the source base station Ia forwarded packets, thereby maintaining the packet sequence matching.

[0020] 在图24中,在切换前,在移动源基站Ia中存储有分组n_5〜n,这些分组中的分组n-5〜n-2已经被发送给移动站4,而分组n_l和η尚未被发送给移动站4。 [0020] In FIG 24, before the handover, the source base station stores packet Ia n_5~n, these packets in packets n-5~n-2 has been transmitted to the mobile station 4, and the packet n_l η Not to the mobile station 4. 此外,向移动站发送的分组中的分组η_5和η_3未被移动站4正确地接收(NACK),而分组η_4和η_2则被正常地接收到(ACK)。 In addition, packet transmission to the mobile station and the packet η_5 η_3 not properly receive the mobile station 4 (NACK), and are grouped η_4 η_2 were correctly received (ACK). 因此,移动站4将分组n-4、n-2保存在缓存器BFl中,而未保存分组n-5 和n-3。 Accordingly, the mobile station 4 packets n-4, n-2 stored in the buffer BFl, the unsaved packets n-5 and n-3.

[0021] 在该状态下,当发生切换时,移动源基站Ia向移动目的地基站Ib转发(forwarding)未被移动站4正常接收的分组n_5和n_3以及尚未向移动站4发送的分组n-1〜n,移动目的地基站Ib将该分组存储在缓存器BF中。 [0021] In this state, when the handover occurs, the source base station to the target base station forwards Ia Ib (forwarding) the mobile station 4 has not been normally received packets and a packet n_5 n_3 and not yet sent to the mobile station 4 N- 1~n, Ib the target base station stores the packet in the buffer BF. 此外,上级站2在切换后向移动目的地基站Ib发送要发给移动站4的两个分组m〜m+1,移动目的地基站Ib将该分组存储在缓存器BF中。 In addition, the host station 2 after the handover to the target base station to the mobile station Ib transmits two packets to m~m 4 + 1, the target base station stores the packet Ib in the buffer BF.

[0022] 当移动目的地基站Ib可以与移动站4进行通信时,首先向移动站4优先发送从移动源基站Ib转发来的分组n-5、n-3、n-1〜η。 [0022] When the target base station Ib may communicate with the mobile station 4, the mobile station 4 first transmit priority packets forwarded from the source n-5 base Ib, n-3, n-1~η. 然后,发送从上级站2接收到的分组m〜m+1 ο如图25所示,移动站4按照序列号顺序对切换之前接收完毕的分组n-4、n-2和切换之后接收的分组n-5、n-3、nl〜n、m〜m+1进行重新排列,并按顺序把它们传递给上位层。 Then, from the host station 2 receives the transmitted packet m~m + 1 ο shown in Figure 25, the mobile station 4 in accordance with the sequence numbers of the packets have been received before the handover n-4, n-2, after receiving a packet and switching n-5, n-3, nl~n, m~m + 1 are rearranged according to the order they are delivered to the upper layer.

[0023] 上面是通过转发(forwarding)将分组n_5、n_3、n-Ι〜η全部转发(forwarding)给移动目的地基站Ib的情况,但还存在只转发了分组n-5、n_3,而n_l〜η的转发出现了延迟的情况。 [0023] The above is by forwarding (Forwarding) packet n_5, n_3, n-Ι~η all Forwarding (Forwarding) to the mobile target base station (Ib), but there is only forwarded packets n-5, n_3, and n_l ~η forwarding appeared delays. 图26是该情况下的分组顺序匹配的说明图。 FIG 26 is a sequence in this case a packet matches the description of FIG. 移动目的地基站Ib将转发来的分组η-5、η-3和从上级站进入的分组m〜m+1存储在缓存器BF中,但首先向移动站优先发送从移动源基站Ia转发来的分组n-5、n-3。 Ib the target base station forwards the packet to the η-5, η-3 + 1 and stored in the buffer BF, the first transmission priority of a packet entering from the upper station to the mobile station m~m from the source base station for forwarding Ia packets n-5, n-3. 然后,在由移动源基站Ia进行的分组n_l、n的转发出现了延迟的情况下,移动目的地基站Ib监视是否经过了设定时间(Waiting Time:等待时间),当经过了等待时间仍然未从移动源基站Ia转发来分组n-1、η时,视为转发结束,发送从上级站接收的分组m、m+1 ο另外,在转发结束后,移动目的地基站Ib即使从移动源基站Ia接收到分组n-1、n,也会将该分组丢弃。 Then, the packet n_l by the source base station Ia, n forwarding occurs the case where the delay, the target base station monitors whether Ib set time (Waiting Time: waiting time), when the elapsed time is still not wait Ia forwarded from the source base station to the packet n-1, when [eta], considered forward end, transmit the packet received from the upper station m, m + 1 ο Further, after the forwarding, the target base station from a source base station even Ib Ia received packet n-1, n, the packet will be discarded.

[0024] 移动站4执行按序列号顺序对接收到的分组进行重新排列的处理(重排序)。 [0024] The mobile station 4 performs packet order of the sequence number of the received process (reordering) rearranged. 如图27所示,移动站4按序列号顺序对切换之前接收完毕的分组n-4、n-2和切换之后接收的分组n-5、n-3、m、m+1进行重新排列,并按顺序把它们传递给上位层。 As shown, after the mobile station 4 receives the order of the sequence numbers of the packets have been received before the handover n-4, n-2 and the switching packet n-5, n-3, m, m + 1 for 27 rearranged, and sequentially transfer them to the upper layer.

[0025].协议结构 [0025] The protocol structure

[0026] 如上所述,在LTE通信系统的切换中,分组转发(forwarding)和分组的重排序处理是必要的技术。 [0026] As described above, in a handover in the LTE communication system, packet transfer (Forwarding) and packet reordering process technology is necessary. 这里,对这些功能的关系进行更详细的说明。 Here, the relationship between these features in more detail.

[0027] 图28是表示移动站与网络之间的协议结构的说明图。 [0027] FIG. 28 is an explanatory diagram showing the protocol configuration between a mobile station and a network. 在移动站与基站之间,至少设置有I3DCP (Packet Data Convergence Protocol:分组数据汇聚协议)层、RLC (Rad1Link Control:无线链路控制)层、以及下位层(MAC层/物理层MAC/PIIY)。 Between the mobile station and a base station, provided with at least I3DCP (Packet Data Convergence Protocol: Packet Data Convergence Protocol) layer, RLC (Rad1Link Control: Radio Link Control) layer and a lower layer (MAC layer / physical layer MAC / PIIY) . MME/S-GW具备分组路由功能等。 MME / S-GW includes a packet routing function.

[0028] 各协议的主要功能如下。 [0028] The main functions of each protocol are as follows.

[0029] (I)PDCP:在rocp层中,在发送侧压缩上位协议的报头,并附加序列号进行发送。 [0029] (I) PDCP: In rocp layer, the transmitting side upper header compression protocol, and transmitted sequence numbers. 在接收侧,对序列号进行检查,由此来进行重复接收的废弃处理。 On the receiving side, the serial number of the check, thereby discarding the received process repeated. 在rocp层中不进行重新发送。 Without resending rocp layer.

[0030] (2) RLC:RLC层是具有重新发送功能的层,新附加与来自HXP的数据中附加的序列号不同的RLC层中的序列号,并进行发送。 [0030] (2) RLC: RLC layer is a layer having a re-transmitting function, and the additional data from the new HXP sequence number of additional different RLC layer sequence number and transmitted. 例如,在从rocp接收到序列号为η的数据时,将该数据分割成多份,对各个分割数据分别附加RLC层中的序列号1(1)、1(2)、1(3)...,并进行发送。 For example, upon receiving from the sequence number η rocp data, the data is divided into a plurality of parts, each sequence number is added to each divided data in an RLC layer (1), 1 (2), 1 (3). .., and transmitted. 接收侧利用该序列号I (.),向发送侧通知表示数据的正常接收/异常接收的送达确认信号(Ack/Nack信号)。 Acknowledgment signal (Ack / Nack signal) on the receiving side by using the sequence number I (.), Indicating normal reception notification to the transmission side data / abnormal reception. 如果返回了Ack信号,则发送侧丢弃所保存的数据,另一方面,如果返回了Nack,则发送侧重新发送所保存的相应数据。 If the Ack signal is returned, the transmitting side discards the stored data, on the other hand, if the return Nack, the transmitting side transmits the corresponding data newly stored.

[0031] (3)下位层 [0031] (3) a lower layer

[0032] MAC:MAC层是对RLC层的数据进行复用/分离的层。 [0032] MAC: MAC layer is a RLC layer data multiplexing / separating layer. 即,在发送侧,对RLC层的数据进行复用将其作为发送数据,在接收侧,把MAC层的接收数据分离为RLC层的数据。 That is, the transmitting side, the RLC layer data are multiplexed to be transmitted as data, at the receiving side, the received data separating MAC layer to RLC layer data.

[0033] PIIY:PIIY层是在用户终端4与基站I之间以无线方式进行数据收发的层,将MAC层数据转换成无线数据,或将无线数据转换成MAC层数据。 [0033] PIIY: PIIY layer is performed between the user terminal and the base station 4 layer I wirelessly transmitting and receiving data, converts the MAC layer data into radio data, or converts the radio data into MAC layer data.

[0034] 向移动站发送的数据首先从上位层(例如IP层)进入rocp层而成为rocp sdu(Service Data Unit:服务数据单元),然后被附加报头信息(PDCP层的序列号等)而成为PDCP PDU (Protocol Data Unit:协议数据单元)。 [0034] The data transmitted to the mobile station is first from the upper layer (e.g. IP layer) to enter ROCP layer becomes rocp sdu (Service Data Unit: Service Data Unit), then additional header information (sequence numbers of the PDCP layer, etc.) becomes PDCP PDU (protocol data unit: protocol data unit).

[0035] PDCP PDU被发回到RLC层而成为RLC SDU,然后被附加报头信息(RLC层的序列号等)而成为RLC PDU0 RLC PDU经过下位层的处理而到达移动站的RLC层。 [0035] PDCP PDU is sent back to the RLC layer becomes RLC SDU, and then additional header information (RLC layer sequence number, etc.) to be treated RLC PDU0 RLC PDU to reach the lower layer of the RLC layer of the mobile station. 在该RLC层中,去除报头而重新构筑RLC sdu,然后在rocp层中去除rocp pdu的报头而成为rocp sdu,并发回到上位层。 In the RLC layer, removing the header and re-build RLC sdu, then remove the header rocp pdu in rocp layer becomes rocp sdu, sent back to the upper layer.

[0036] 在这种协议结构中,对于LTE通信系统而言,以rocp SDU为单位实施分组转发,Wrocp pdu为单位实施重排序。 [0036] In this protocol configuration, for the LTE communication system, in units of embodiment rocp SDU packet forwarding, Wrocp pdu embodiment reordering units. 此外,在以rocp sdu为单位实施转发的情况下,没有对以PDCP SDU为单位的分组附加序列号等报头信息,因此无法将该序列号进行转发。 Further, in the case of units rocp sdu forwarded embodiment, there is no information in the header unit of PDCP SDU sequence numbers of the packets and the like, the serial number can not be forwarded. 因此,在wrocp SDU为单位实施转发的情况下,还要转发应该附加的序列号等报头信息。 Thus, in the case where wrocp SDU forwarding unit of the embodiment, but also forwards the sequence number should be attached to the header information. 另外,RLCSDU与rocp PDU实质上是相同的数据,因此在本说明书中只要没有特别限定,就将它们统称为分组,在描述了该分组的编号的情况下,该编号是指rocp PDU的序列号。 Further, RLCSDU rocp PDU with substantially the same data, so in the present specification, unless otherwise specified, they will be referred to as a packet, is described in the case of the packet number, the number refers to the sequence number of rocp PDU .

[0037].移动源基站装置的动作 [0037] The operation of the handover source base station apparatus

[0038] 图29是切换时的移动源基站装置的动作流程图。 [0038] FIG. 29 is a flowchart of the operation of the source base station device during handover.

[0039] 移动源基站Ia在通过测定报告从用户终端4接收到接收电场强度等时(步骤101),判断是否需要进行切换HO (步骤102),如果不需要进行切换则返回到始点。 [0039] Ia at the source base station (step 101) by receiving a measurement report from the user terminal 4 to the receiving electric field strength and the like, determines whether handover HO (step 102), if no switch is returned to the starting point.

[0040] 但是,当确定为需要进行切换时,移动源基站Ia根据测定报告的内容来确定移动目的地基站lb,向该移动目的地基站Ib发送切换请求(步骤103)。 [0040] However, when it is determined that handover is necessary, the source base station determines a target base station Ia lb measurement report based on the content, to the target base station transmits a handover request Ib (step 103).

[0041] 然后,接收从移动目的地基站Ib发送来的切换响应(步骤104),进行剩余分组的转发(步骤107)。 [0041] Then, in response to receiving the handover (step 104) is sent from the target base station to Ib, forwards the remaining packet (step 107).

[0042] 之后,接收从移动目的地基站Ib发送来的资源释放消息(步骤108),执行资源释放(步骤109)。 After [0042] receiving transmitted from the movement destination base station Ib resource release message (step 108), performs a resource release (step 109).

[0043].移动目的地基站的动作 [0043] The operation of the target base station

[0044] 图30是切换时的移动目的地基站的动作流程图。 [0044] FIG. 30 is a flowchart of the operation target base station during handover.

[0045] 移动目的地基站Ib在从移动源基站Ia接收到HO请求(包含移动站ID和QoS信息等)时(步骤121),根据这些信息来进行呼叫接入控制,判断是否允许接入移动站(步骤122)。 [0045] Ib at the target base station (step 121) received from the source base station Ia HO request (including mobile station ID and QoS information, etc.), in accordance with the access information to call control determines whether the access-permitted mobile station (step 122). 如果不允许,则执行后处理(步骤130),结束切换控制。 If not, then performs post processing (step 130) and ends handover control.

[0046] 另一方面,在允许接入移动站的情况下,向移动源基站Ia回复HO响应(步骤123)。 [0046] On the other hand, in the case where the access-permitted mobile station to the source base station HO Ia reply response (step 123). 接着,移动目的地基站Ib将从移动源基站Ia转发来的分组存储在缓存器中(步骤124),并且从移动站4接收HO完成的报告(步骤125)。 Next report, the target base station from a source base station Ia Ib forwarded packets stored (step 124), and from the mobile station 4 receives the HO complete in the buffer (step 125). 如果接收到HO完成的报告,则移动目的地基站Ib将HO完成的报告发送给上级站2(步骤126)。 Upon receiving the HO complete report, the target base station transmits Ib to the host station 2 (step 126) HO completion report. 上级站2在接收到切换完成的报告时,将分组传输路径从移动源基站Ia切换到移动目的地基站lb,向移动目的地基站Ib回复HO完成响应。 When the host station 2 receives the handover complete report, the packet transmission path from the handover source base station to the target base station LB Ia, replies HO completion response to the movement destination base station Ib. 如果移动目的地基站Ib从上级站2接收到HO完成响应(步骤127),则从由移动目的地基站Ib转发来的分组开始将其优先发送给移动站,在发送了该分组后,向移动站发送从上级站2接收到的分组(调度:步骤128)。 If the target base station receives from the host station 2 Ib the HO completion response (step 127), from the target base station forwards the packet to start Ib preferentially transmits it to the mobile station, after transmitting the packet to the mobile station transmitted from the host station 2 receives the packet (scheduling: step 128). 此外,与步骤128并行地,移动目的地基站Ib向移动源基站Ia发送资源释放消息(步骤129),进行后处理(步骤130),结束切换控制。 Further, in parallel with step 128, the target base station transmits to the movement origin base station Ib Ia resource release message (step 129), post-processing (step 130) and ends handover control. 另外,在步骤128的调度处理中由移动源基站Ia进行的分组转发发生延迟的情况下,移动目的地基站Ib监视是否经过了设定时间(Waiting Time:等待时间),当经过了等待时间仍然未转发来分组时,视为转发结束,发送从上级站接收的分组,并且在转发结束后,即使从移动源基站Ia接收到分组,也会将该分组丢弃。 Further, at step 128 the packet scheduling process performed by the source base station forwarding Ia with a delay occurs, the target base station monitors whether Ib set time (Waiting Time: waiting time), when the elapsed time is still waiting when the packet is not forwarded, the forwarding considered ended, the transmission packet received from the upper station, and after forwarding, even if received from the source base station to Ia packet, the packet will be discarded.

[0047].移动站的动作 [0047] The operation of the mobile station

[0048] 图31是切换时的移动站的动作流程图。 [0048] FIG. 31 is a flowchart showing the operation of a mobile station during handover.

[0049] 移动站4的测定部通过测定报告向移动源基站通知接收电场强度等(步骤151)。 Determination unit [0049] The mobile station 4 notifies the reception electric field strength to the source base station via the measurement report (step 151). 之后,等待来自移动源基站Ia的HO指示,当接收到HO指示时(步骤152),通过L1/L2信令来确保与移动目的地基站Ib保持同步(步骤153),在确保了同步后,向移动目的地基站Ib发送切换完成的报告(步骤154),然后,移动站在从移动目的地基站Ib接收到分组时,执行重排序处理(步骤155〜160)。 After HO, the source base station waits for an indication Ia, when (step 152) receiving the HO indicated by L1 / L2 signaling to ensure synchronized movement destination base station Ib (step 153), to ensure the synchronization, reporting (step 154), then the mobile station from the target base station receives the packet Ib target base station to the mobile switching Ib completed, performs the reordering process (step 155~160).

[0050] 即,移动站的控制部在从移动目的地基站Ib接收到下位层分组时,构筑RLCSDU,将该RLC SDU(PDCP I3DU)交给重排序部(步骤155)。 When [0050] That is, the control unit of the mobile station received from the movement destination base station to lower layer packets Ib build RLCSDU, the RLC SDU (PDCP I3DU) to a reordering unit (step 155). 重排序部检查序列号是否存在缺失(步骤156),如果序列号不存在缺失而是连续的,则将该RLC SDU (H)CP TOU)作为TOCP SDU传递给上位层(步骤160)。 Reordering unit checks whether there is a missing sequence number (step 156), if there is no missing sequence number but continuously, then the RLC SDU (H) CP TOU) passed as TOCP SDU to the upper layer (step 160). 另一方面,如果序列号存在缺失,则控制部指示重排序部保存rocpPDUo由此,重排序部保存rocp PDU (步骤157),并检查是否接收到序列号连续的RLC SDU(PDCP PDU)(步骤158)。 On the other hand, if there is a missing sequence number, the control unit instructs the reordering unit to save rocpPDUo Thereby, the reordering unit to save rocp PDU (step 157), and checks whether the sequence number of successive RLC SDU (PDCP PDU) (step 158). 如果接收到序列号连续的RLC SDU (H)CP PDU),则将该RLC SDU(PDCP rou)作为rocp sdu传递给上位层,并且将所保持的rocp pdu传递给上位层(步骤160)。 If a continuous sequence number is received RLC SDU (H) CP PDU), then the rocp sdu passed to the upper layer, and transfers rocp pdu held to the upper layer (step 160) RLC SDU (PDCP rou) as a.

[0051] 此外,在步骤158中,如果未接收到序列号连续的RLC SDU (H)CP PDU),则监视是否经过了预定时间(步骤159),如果尚未经过预定时间,则重复步骤157及之后的处理,而如果已经经过了预定时间,则即使序列号不连续,也要将所保存的HXP PDU传递给上位层(步骤160)。 [0051] Further, at step 158, if no received sequence number consecutive RLC SDU (H) CP PDU), it monitors whether the predetermined time has elapsed (step 159), if not already predetermined time has elapsed, it repeats step 157 and after the treatment, whereas if the predetermined time has elapsed, even if the sequence numbers are not continuous, but also to transfer the stored HXP PDU to the upper layer (step 160).

[0052].课题 [0052]. Topics

[0053] 但是,当在LTE通信系统中执行伴有切换的分组转发时,存在如下课题。 [0053] However, when performing handover with the LTE communication system, packet transfer, there is a problem. S卩,当执行切换时,如上所述,在LTE通信系统中,执行遗留在移动源基站Ia中的移动站数据的交接,并产生伴随交接的分组转发(forwarding)。 S Jie, when handover is performed, as described above, in the LTE communication system, for performing a handover source base station left in the mobile station data Ia and produces a packet forwarding (Forwarding) accompanying the handover. 但是,在上述切换控制中,当移动目的地基站Ib的等待时间(Waiting Time)的值较小时,存在尽管尚未转发所有分组,移动目的地基站Ib就开始传输从上级站接收到的分组,从而丢弃尚未转发的分组的问题。 However, in the switching control, when the target base station Ib waiting time (Waiting Time) value is small, although the presence of all the packets has not been forwarded, the target base station starts transmission Ib packets received from the host station, so that discard problem has not been forwarded packet. 另一方面,在等待时间的值较大时,移动目的地基站Ib在经过等待时间之前不传输从上级站接收到的分组,从而存在发生传输延迟的问题。 On the other hand, large, Ib target base station does not transmit a packet received from the host station to the waiting time elapsed before the value of the waiting time, so that the presence of occurrence of the problem of transmission delay. 即,在以往的切换控制中,会发生通信延迟增加以及吞吐量恶化的问题,无法在切换前后确保高质量的通信。 That is, in the conventional switching control, the communication delay and increased throughput degradation problem occurs, we can not ensure high quality communication before and after handover.

[0054] 作为第I现有技术,存在从移动源基站向移动目的地基站通知所转发的最后的分组(Last Packet)的方法(参照非专利文献3)。 The method of the last packet (Last Packet) forwarded to the [0054] I, as a prior art, there is from the source base station notifies the target base station (refer to Non-Patent Document 3). 在转发出现延迟的情况下,被通知了最后的分组的移动目的地基站可以将从上级站接收到的分组的序列号设为最后的分组的序列号+ I并进行跳跃传输。 In the forward delay occurs, the target base station is notified of the last packet may be received from the upper station to the packet sequence number to the sequence number of the last packet + I and jump transmission. 此外,移动目的地基站可以将转发来的分组的序列号与最后的分组的序列号进行比较,由此来强制结束等待定时器(Waiting Timer),从而能够在最佳定时检测转发的结束。 In addition, the target base station may forward the packet to the serial number of the last packet sequence number comparison, thereby to force the end of the wait timer (Waiting Timer), it can be forwarded at the optimum timing detection end. 但是,在转发过程中丢弃了最后的分组的情况下,移动目的地基站无法可靠地检测到最后的分组。 However, the case of the last discarded packet during forwarding, the target base station can not reliably detect the last packet.

[0055] 此外,作为第2现有技术,存在这样的移动通信系统:该移动通信系统用于在正进行高速分组通信的基站之间进行切换时,实现不发生数据丢失的高速分组数据转发(参照专利文献I)。 [0055] Further, as the second prior art, there is a mobile communication system: the mobile communication system is being performed handover between base stations of high-speed packet communication, high-speed packet data forwarding data loss does not occur ( Referring to Patent Document I). 在该移动通信系统中,当发生切换时,切换源的基站向切换目的地基站转发(forwarding)分组数据。 In the mobile communication system, when the handover occurs, the handover source base station forwards the handover destination base station (Forwarding) data packet. 但是,这一技术并未改善由移动站的重排序造成的通信延迟增加以及吞吐量恶化。 However, this technique does not improve the communication caused by the reordering delay in the mobile station and increase the throughput deterioration.

[0056] 此外,作为第3现有技术,存在这样的方法:在移动目的地基站中,不等待所转发的分组的到达,而是跳跃地传输从上级站传输来的分组(参照专利文献2)。 [0056] Further, as a third prior art, there is a method: in the target base station, without waiting for the arrival of packets forwarded, but jumps to the transmitted packets transmitted from the superordinate station (refer to Patent Document 2 ). 在该方法中,通过区分从移动源基站接收到的分组和从上级站接收到的分组,能够实现分组的跳跃传输。 In this method, by distinguishing received from the source base station to the packet and the packet received from the host station, it is possible to realize jumping transport packet. 但是,在移动站中需要设置两个顺序控制的功能,导致其控制变得复杂。 However, in the mobile station requires two successive control function is provided, which leads to complicated control.

[0057] 由上,本发明的目的在于,要将从上级站(例如是与移动源基站不同的、向移动目的地基站发送数据(分组)的装置)传输给移动目的地基站的分组迅速传输到移动站。 [0057] from the above, an object of the present invention is to be from the superordinate station (e.g., source base station is different, and transmits data to the target base station (packet) means) to the target base station packet transmission is rapidly to the mobile station.

[0058] 本发明的另一目的在于,即使从移动源基站转发来的分组与从上级站传输来的分组混在一起,也能够通过从顺序控制的对象中排除该从上级站传输来的分组,由此仅利用一个顺序控制功能即可正确地对转发来的分组进行重排序。 [0058] Another object of the present invention, even when from the source base station and packets forwarded from the packet mixed superordinate station transmitted together, can be excluded from a target sequence by the control from the host station in the transmitted packet, thereby using only a sequential control function to correctly forward the packet to the reordering.

[0059] 另外,本发明的另一目的可以定位于,提供实施例等中记载的未由现有技术公开的事项。 [0059] Further, another object of the present invention may be positioned to provide other embodiments not disclosed by the matters described in the prior art. 优选的是,这样的事项是为了得到现有技术所无法获得的效果所必须的事项。 Preferably, this matter is to obtain the effect of matter obtained by the prior art can not necessary.

[0060]非专利文献 1:3GPP,“Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN), ” TR25.913V7.3.0,Release7, March2006. [0060] Patent Document 1: 3GPP, "Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN)," TR25.913V7.3.0, Release7, March2006.

[0061]非专利文献 2:3GPP,“Evolved Universal Terrestrial Rad1 Access (E-UTRA)and Evolved Universal Terrestrial Rad1 Access Network(E-UTRAN),”TS36.300,Release8, V8.0.0, April2007. [0061] Non-Patent Document 2: 3GPP, "Evolved Universal Terrestrial Rad1 Access (E-UTRA) and Evolved Universal Terrestrial Rad1 Access Network (E-UTRAN)," TS36.300, Release8, V8.0.0, April2007.

[0062]非专利文献3:Samsung,“Method to release resources at source ENB duringhandover, ” R3-061032,RAN3#53, September2006. [0062] Non-Patent Document 3: Samsung, "Method to release resources at source ENB duringhandover," R3-061032, RAN3 # 53, September2006.

[0063] 专利文献1:日本特开2004-282652号公报 [0063] Patent Document 1: Japanese Laid-Open Patent Publication No. 2004-282652

[0064] 专利文献2:日本特愿2006-086537号 [0064] Patent Document 2: Japanese Patent Application No. 2006-086537

发明内容 SUMMARY

[0065] 本发明的移动站的特征在于,该移动站从如下的移动目的地基站接收序列号,该移动目的地基站是将从移动源基站接收到的序列号用作从上级站接收到的分组的序列号的基站。 [0065] A mobile station according to the present invention, the mobile station receives the following from the sequence number of the target base station, the target base station from a source base station is received sequence number as received from the host station packet sequence number of the base station.

[0066] 本发明的无线通信系统的特征在于,该无线通信系统具有:移动源基站、移动目的地基站以及移动站,所述移动站从如下的移动目的地基站接收序列号,该移动目的地基站是将从移动源基站接收到的序列号用作从上级站接收到的分组的序列号的基站。 [0066] The wireless communication system according to the present invention, the wireless communication system comprising: a source base station, the target base station and a mobile station, the mobile station receives the following from the sequence number of the target base station, the handover target the base station is a base station from the serial number of the source base station the received sequence number as received from the host station to the packet.

[0067] 本发明的基站的特征在于,该基站将从移动源基站接收到的序列号用作移动目的地基站从上级站接收到的分组的序列号。 [0067] A base station according to the present invention is that the source base station from the mobile station the received sequence number as the sequence number received from the movement destination base station to the higher-level packets.

附图说明 BRIEF DESCRIPTION

[0068] 图1是第I实施例的说明图。 [0068] FIG. 1 is an explanatory view of Embodiment I of the embodiment.

[0069] 图2是I3DCPPDU分组的格式例。 [0069] FIG. 2 is an example of the format of the packet I3DCPPDU.

[0070] 图3是切换前的rocp层和RLC层的分组处理的说明图。 [0070] FIG. 3 is a diagram illustrating packet processing before the switching rocp layer and RLC layer.

[0071] 图4是切换后的rocp层和RLC层的分组处理的说明图。 [0071] FIG. 4 is a diagram illustrating packet processing after switching rocp layer and RLC layer.

[0072] 图5是基站的结构图。 [0072] FIG. 5 is a block diagram of a base station.

[0073] 图6是移动站的结构图。 [0073] FIG. 6 is a configuration diagram of a mobile station.

[0074] 图7是第I实施例的移动目的地基站的动作流程图。 [0074] FIG. 7 is a flowchart of Example I of the embodiment of the target base station.

[0075] 图8是第I实施例的移动源基站的流程图。 [0075] FIG 8 is a flowchart of a mobile source base station I embodiment.

[0076]图9是第I实施例的移动站的动作流程图。 [0076] FIG. 9 is a flowchart of the operation of station I of the Examples.

[0077] 图10是移动站的重排序处理流程。 [0077] FIG. 10 is a reordering process flow of the mobile station.

[0078] 图11是第2实施例的说明图。 [0078] FIG. 11 is an explanatory view of a second embodiment.

[0079] 图12是I3DCPPDU分组的格式例。 [0079] FIG. 12 is a format of a packet I3DCPPDU embodiment.

[0080] 图13是切换后的rocp层和RLC层的分组处理的说明图(之一)。 [0080] FIG. 13 is a packet after the switching process of the RLC layer and the layer rocp explanatory view (one).

[0081] 图14是切换后的rocp层和RLC层的分组处理的说明图(之二)。 [0081] FIG. 14 is an explanatory diagram (part 2) after switching the packet processing rocp layer and RLC layer.

[0082] 图15是第2实施例的移动目的地基站的动作流程图。 [0082] FIG. 15 is a flowchart of the operation target base station to a second embodiment.

[0083] 图16是第2实施例的移动站的动作流程图。 [0083] FIG. 16 is a flowchart showing the operation of the second embodiment of the mobile station.

[0084] 图17是将HXP PDU的序列号附随在相应的HXP SDU数据后并通过数据平面(U-Plane)进行通知的例子。 [0084] FIG. 17 is an example of the accompanying HXP PDU sequence number and the corresponding notification after HXP SDU data via the data plane (U-Plane).

[0085] 图18是将rocp PDU的序列号SN附随在相应的I3DCP SDU数据后并通过U-Plane进行通知,同时通过C-plane通知序列号的例子。 [0085] FIG. 18 is a rocp PDU sequence number SN and notified by the appended U-Plane I3DCP SDU after the corresponding data, while the example C-plane through the notification sequence number.

[0086] 图19是图18的切换顺序步骤。 [0086] FIG. 19 is a switching sequence of step 18 of FIG.

[0087] 图20是完全不存在要转发的HXP SDU数据的情况的例子。 [0087] FIG. 20 is completely the case to be forwarded HXP SDU data present example.

[0088] 图21是切换时的交接说明图。 [0088] FIG. 21 is an explanatory view when the transfer switch.

[0089] 图22是LTE通信系统的切换说明图。 [0089] FIG. 22 is an explanatory view of handover of an LTE communication system.

[0090] 图23是在LTE通信系统中目前所设想的切换步骤说明图。 [0090] FIG. 23 is a LTE communication system as currently envisaged handover procedure explained in FIG.

[0091] 图24是移动站的重排序处理的第I说明图。 [0091] FIG. 24 is a reordering process of the mobile station I of FIG.

[0092] 图25是移动站的重排序处理的第2说明图。 [0092] FIG. 25 is a second drawing explaining the reordering process of the mobile station.

[0093] 图26是移动站的重排序处理的第3说明图。 [0093] FIG. 26 is a third drawing explaining the reordering process by a mobile station.

[0094] 图27是移动站的重排序处理的第4说明图。 [0094] FIG. 27 is a fourth drawing explaining the reordering process of the mobile station.

[0095] 图28是表示移动站与网络之间的协议结构的说明图。 [0095] FIG. 28 is an explanatory diagram showing the protocol configuration between a mobile station and a network.

[0096] 图29是切换时的移动源基站装置的动作流程图。 [0096] FIG. 29 is a flowchart of the operation of the source base station device during handover.

[0097] 图30是切换时的移动目的地基站的动作流程图。 [0097] FIG. 30 is a flowchart of the operation target base station during handover.

[0098] 图31是切换时的移动站的流程图。 [0098] FIG. 31 is a flowchart of a mobile station during handover.

具体实施方式 Detailed ways

[0099] (A)本发明的原理 [0099] Principle (A) of the present invention

[0100] 在本发明中,通过使基站和移动站能够执行以下两个处理来解决其课题。 [0100] In the present invention, by the base station and the mobile station can perform the following two process to solve their problem.

[0101] 处理1:在切换后,由于来自移动源基站的数据转发发生了延迟,因此不等待该数据的接收而传输(跳跃传输)从上级站机接收完毕的数据,在该情况下,使得移动站能够识别出该数据是跳跃数据,并执行跳跃传输。 [0101] Processing 1: after the handover, since the data from the source base station forwards a delay occurs, and therefore does not wait to receive the data transmitted (jump transmission) data have been received from the upper station machine, in this case, such that the mobile station can recognize that the data is jump data, and executes jump transmission. 即,将用于识别是跳跃数据的识别信息包含在该数据中,或者将该识别信息附加到该数据中,或者使该识别信息与该数据对应起来,并例如利用控制信道进行发送。 I.e., is skipped for identifying data identifying information contained in the data, or the identification information to the additional data, so that the identification information or correspondence to the data, for example, using a control channel and transmitted.

[0102] 处理2:移动站在检测到发生了跳跃传输的情况下,不将该跳跃数据视为重排序对象,将其保存在缓存器中,等待从移动源基站转发来的数据的到达。 [0102] Processing 2: The mobile station detects the occurrence of a case where the jump transmission, not the objects of reordering data as a jump, which is stored in the buffer, waits for the arrival forwarded from the source base station data. 即,使用识别信息来区分从移动源基站转发来的数据和未经过移动源基站发送来的数据,并进行重排序。 That is, using the identification information to distinguish from the source base station and forwarded to the data are not transmitted via the source base station data and reordering.

[0103] 在现有方法中,在从移动源基站向移动目的地基站的数据转发(forwarding)发生了延迟的情况下,等待向移动站发送从上级站传输到移动目的地基站的数据。 [0103] In the conventional method, forwarding (Forwarding) data from the source base station to the target base station with a delay occurs, the transmission waiting data transfer from the host station to the target base station to the mobile station. 因此,由于要在经过规定时间(Waiting Time:等待时间)之前等待该数据的到达,从而存在发生通信延迟增加以及吞吐量下降的课题。 Thus, due to the lapse of a predetermined time (Waiting Time: waiting time) before waits for the arrival of the data, so that there occurs a communication delay problems and increase throughput degradation. 但是,如上所述,如果进行数据的跳跃传输,则即使在数据转发(forwarding)发生延迟的情况下,也能够将从上级站接收到的数据迅速传输给移动站,由此,减小了通信延迟。 However, as described above, if the jump transmission of data, forwarding the case (Forwarding) is delayed, the transmission can be rapidly received from the upper station to the mobile station even when data in the data, thereby reducing communication delay. 因此,与现有方法相比,能够高质量地确保切换前后的通信质量。 Thus, compared to the conventional methods, it is possible to ensure high quality communication quality before and after the handover.

[0104] (B)第I实施例 [0104] (B) of Example I

[0105]图1是第I实施例的说明图,其对以分组为单位来附加顺序信息的情况行了说明,不过也可以是规定大小的数据。 [0105] FIG. 1 is an explanatory view of Embodiment I of the embodiment, which is the case of packet units to the additional order information line has been described, but may be a predetermined data size.

[0106] 设为在切换前,在移动源基站Ila中存储有分组n-5〜n,这些分组中的分组n-5〜n-2已经被发送到移动站14,而分组n_l和η未被发送到移动站14。 [0106] is set before the handover, the source base station stores the packet Ila n-5~n, these packets in packets n-5~n-2 has been transmitted to mobile station 14, the packet is not n_l and η 14 is transmitted to the mobile station. 例如,是由于分组n-Ι和η是在切断移动源基站Ila与移动站14之间的无线线路之后才到达,因此这些分组n-Ι和η未被发送到移动站14。 For example, since the packet is n-Ι and η is the cut Ila source base station and the mobile station only after reaching the wireless line 14 between, so these packets n-Ι η and not sent to the mobile station 14. 此外,设为向移动站发送的分组中的分组η_5、η_3未被移动站14正确接收到(NACK),而分组η-4、η-2被正常接收到(ACK)。 Further, it is assumed packet η_5 packet transmitted to the mobile station, η_3 mobile station 14 has not been correctly received (NACK), the packet η-4, η-2 is normally received (ACK). 因此,移动站14保存分组n-4、n-2,而没有保存分组n_5、n_2。 Accordingly, the mobile station 14 saves packets n-4, n-2, but not saved packet n_5, n_2.

[0107] 在该状态下,当发生切换时,移动源基站Ila向移动目的地基站Ilb转发(forwarding)未被移动站14正常接收的分组n_5和n_3以及未发送的分组η_1、η。 [0107] In this state, when the handover occurs, the source base station to the target base station forwards Ila Ilb (forwarding) the mobile station 14 has not been normally received packets and a packet η_1 n_5 n_3 and unsent, η. 以下说明对分组进行转发的情况下,但不限于这样的例子。 The following description of the case where the packet is forwarded, but not limited to such an example.

[0108] 此外,上级站2在切换后向移动目的地基站Ilb发送要发给移动站的两个分组m〜m+1。 [0108] In addition, the host station 2 transmits to the target base station after the handover Ilb two packets to be sent to the mobile station m~m + 1. 另外,设分组n-5〜η的转发(forwarding)发生了延迟。 Further, it is assumed n-5~η forwarding packet (Forwarding) a delay occurs.

[0109] 移动目的地基站Ilb如果在从移动源基站Ila转发来分组n-5、n-3、n_l〜η之前从上级站2接收到分组m、m+1,则对该从上级站接收到的分组m、m + I附加跳跃识别码F,并先将它们发送(跳跃传输)给移动站14。 [0109] If the target base station Ilb Ila from a source base station to forward the packet n-5, n-3, n_l~η before receiving a packet from the host station 2 to m, m + 1, is received from the upper station packet m, m + I additional jump ID code F, and transmits (jump transmission) to the first mobile station 14 thereof.

[0110] 移动站14将从基站接收到的附加了跳跃识别码F的分组保存到缓存器BF2中,并将它们排出在重排序处理的对象之外。 [0110] The mobile station 14 receives from the base station is added to the buffer BF2 to the stored hop packet ID code F, and discharging them outside of the object of the reordering process. 图1的(A)表示移动站14在缓存器BF2中保存有分组m、m + 1,并且在切换前在缓存器BFl中保存有接收到的分组η — 4、η — 2的状态。 FIG 1 (A) indicates that the mobile station 14 is stored in the buffer BF2 has packets m, m + 1, and stores the packets before switching to [eta] received in the buffer BFl in - 4, η - State 2.

[0111] 然后,移动目的地基站Ilb向移动站发送从移动源基站Ila转发来的分组n-5、n-3、n-1〜η。 [0111] Then, the target base station to the mobile station transmits Ilb forwarded from the source base station to a packet Ila n-5, n-3, n-1~η. 移动站14将从移动目的地基站Ilb接收到的这些分组η-5、η-3、η_1〜η保存在缓存器BFl中,进行这些在切换后接收到的分组和在切换前接收到的分组n-4、n-2的重排序处理(参照图1 (B)),并按照连续编号顺序将分组传递给上位层。 14 from the target base station to the mobile station receives the packets Ilb η-5, η-3, η_1~η stored in the buffer BFl in these after switching the received packet and the packet received before the handover n-4, n-2 reordering process (see FIG. 1 (B)), and passes the packet to the upper layer in consecutive numerical order. 另外,当经过了规定时间仍未接收到连续编号的分组时,结束重排序处理,将至此为止接收并重新排列的分组传递给上位层。 Further, when a predetermined time has elapsed does not receive the packets consecutively numbered, ends the reordering process, and up until the received packets rearranged transmitted to the upper layer.

[0112]另外,在转发时,可以从移动源基站向移动目的地基站转发所有分组,也可以只转发分组中包含的一部分数据(用户数据部分)。 [0112] Further, when forwarding may forward all packets to the mobile target base station from the source base station may forward only part of the data (user data portion) contained in the packet. 优选的是,对转发数据附加顺序信息。 Preferably, the additional information data forwarding sequence.

[0113] 此外,在图1中,将序列号(顺序信息)m、m+1分配给进行了跳跃传输的分组,不过移动目的地基站Iib可以分配任意的序列号,还可以附加与对转发的分组附加的序列号重复的编号,此外,也可以采用不重复的编号。 [0113] Further, in FIG. 1, the sequence numbers (order information) m, m + 1 was assigned to packet hopping transmission, but the target base station may assign any Iib serial number, and can additionally forwarded additional packet sequence number unique ID, in addition, a unique ID may be employed.

[0114] •跳跃识别码 [0114] • jump ID code

[0115] 作为对分组附加跳跃识别码F的例子,使用了rocp PDU的报头中包含的3比特的“type”字段。 [0115] As additional packets jump ID code F of example, using the "type" field of the header of 3 bits rocp PDU contained. 即,在该“type”字段中将新的type编号定义为跳跃识别码F,并将该type编号附加给跳跃传输的分组。 That is, the new type number in the definition of the "type" field is the jump ID code F., And the number added to the packet transmission hopping type. 图2是HXP PDU的格式例,(A)是无报头的格式例,(B)是未BWroCP PDU的序列号的格式例,(C)和(D)是附加了rocprou的序列号的格式例。 FIG 2 is a format example HXP PDU is, (A) is an example of format without a header, (B) is an example of the format of the serial number is not BWroCP PDU's, (C) and (D) is added format example serial number rocprou of . 在(C)和(D)的格式中,在报头HD中定义了type字段和PID字段,用type字段表示HXP PDU的类别。 In (C) format and (D), the definition of the type field and the PID field in the header HD, the category represents HXP PDU with the type field. PID字段是表示针对Data部中包含的数据的压缩类别的字段。 PID field is a type of compression for the data contained in the Data section of the field. 在type字段中,已规定了“type = 000”和“type = 001”,而未规定且未使用“type = 010〜111”。 In the type field, has specified "type = 000" and "type = 001", and not without stipulating the use of "type = 010~111". 因此,例如利用“type = 010”,作为用于识别进行了跳跃传输的TOCP PDU的type编号(跳跃识别码)。 Thus, for example, using "type = 010", made TOCP PDU of type number (jump ID code) for identifying as hopping transmission.

[0116].切换前后的rocp层和RLC层的处理 [0116] The processing rocp layer and RLC layer before and after the handover

[0117] 图3是切换前的rocp层和RLC层的分组处理的说明图。 [0117] FIG. 3 is a diagram illustrating packet processing before the switching rocp layer and RLC layer. 移动源基站Ilb将TOCP层的分组n-5〜n-2存储在缓存器中(图3的(A)),如(B)所示,在RLC层中将分组分割成多个数据,针对各个分割数据附加RLC层的序列号1、I + 1、I + 2、…、I + 6,然后发送给移动站14。 The source base station Ilb TOCP layer packet n-5~n-2 stored in the buffer (Fig. 3 (A)), as (B), the packet in the RLC layer is divided into a plurality of data, for SEQ ID NO additional data each divided RLC layer 1, I + 1, I + 2, ..., I + 6, and then transmitted to the mobile station 14. 移动站14在切换前在RLC层中进行针对HXP层的顺序控制。 The mobile station 14 controls the order for HXP layer in the RLC layer before the handover. 在图3中,设为移动站14没有正常接收到分割数据1、I + 4、I + 5,S卩,分组n-5、n-3,但正常接收到了分组n_4、n~2。 In Figure 3, to the mobile station 14 is not received properly divided data 1, I + 4, I + 5, S Jie, packets n-5, n-3, but the normal reception of the packet n_4, n ~ 2.

[0118] 图4是切换后的rocp层和RLC层的分组处理的说明图,并具体示出了TOCP层和RLC层的处理状态。 [0118] FIG. 4 is a diagram illustrating packet processing after switching rocp layer and RLC layer, and specifically shows the processing state TOCP layer and the RLC layer. 另外,虽然移动站14是在切换前在RLC层中进行针对HXP层的顺序控制,但规定在切换后对RLC层进行初始化。 Further, although the mobile station 14 is performed in the RLC layer before the handover sequence for the HXP layer is controlled, but a predetermined initialized RLC layer after the handover. 因此,顺序控制的处理转移到rocp层,移动站14在rocp层中执行切换序列。 Thus, the sequence control process proceeds to rocp layer, the mobile station 14 performs handover sequence rocp layer.

[0119] 移动站14在重排序时起动定时器以判定重排序的结束。 [0119] The mobile station 14 starts a timer to determine when reordering ends reordering.

[0120] 由于从上级站2接收的分组m、m + I率先到达,因此移动目的地基站Ilb对该分组m、m + I附加跳跃识别码F,并先将其传输(跳跃传输)给移动站14。 [0120] Since the packet received by the host station 2 m, m + I the first to arrive, the target base station so Ilb the packets m, m + I jump ID code F. Additionally, its transmission and the first (jump transmission) to the mobile station 14. 移动站14将从基站接收到的附加了跳跃识别码F的分组保存在缓存器BF2中,并将它们排除在重排序处理的对象之外。 14 from the base station to the mobile station receives the packet added jump ID code F is saved in the buffer BF2, and excludes them beyond the object of the reordering process. 之后,移动站14对从移动目的地基站Ilb接收到的分组n-5、n-3、n-Ι〜η和在切换之前接收到的分组n-4、n-2进行重排序处理,并传递给上位层。 Thereafter, the mobile station 14 received from the target base station to Ilb packets n-5, n-3, n-Ι~η and before switching the received packet n-4, n-2 for the reordering process, and transmitted to the upper layer.

[0121] 另外,当定时器经过了规定时间Tm时,移动站14结束重排序处理,即使分组存在缺失,也仍然将接收到的分组发回给上位层。 [0121] Further, when a predetermined time has elapsed the timer Tm, the mobile station 14 ends the reordering process even if there is a missing packet, still received packet back to the upper layer.

[0122] •窗口控制 [0122] • Window Control

[0123] 防备于到来了所能允许的数据量以上的数据的情况,移动站14在内部生成缓存器大小的窗口,并在重排序处理时进行以下的窗口控制。 [0123] to prepare the arrival of more than the allowable amount of data can be data, the mobile station 14 generates a buffer size window in the inside, and performs the following window control during reordering process. 在图4的例子中,窗口的左端为初始时所期待到达的编号n-5,窗口的右端为由所能允许的数据量(窗口缓存器大小)确定的编号n-2。 In the example of FIG. 4, the left end of the window number n-5 expected arrival time of the initial, the right window is the amount allowed for the data (window buffer size) determined number n-2. 移动站不对附加了跳跃识别码F的分组应用窗口处理。 The mobile station does not use packet added identification code window F of skip processing.

[0124] 在初始状态(窗口状态(O))下,当移动站14接收到所期待的分组(n-5)并进行重排序处理时,窗口状态如(I)所示,因此,移动站向上位层转发所期待的分组(n-5)及与其连续的分组(n-4)。 [0124] In the initial state (window state (O)), when the mobile station 14 receives the expected packet (n-5) and the reordering process, the window state such as (I), therefore, the mobile station upper layer packet forwarding expected (n-5) and its successive packet (n-4). 接着,窗口状态变为(2)所示的状态,当移动站14在该状态下接收到所期待的分组(n-3)而进行重排序处理时,窗口状态变为(3)所示的状态。 Next, when the state is changed to the window (2) shows the state, when the mobile station 14 receives the expected packet (n-3) is performed in this state, the reordering process, the window state becomes as shown in (3) status. 因此,移动站向上位层转发所期待的分组(n-3)及与其连续的分组(n-2)。 Accordingly, the mobile station forwards the expected upper layer packet (n-3) and its successive packet (n-2). 然后,窗口状态变为(4)所示的状态,移动站14在该状态下等待分组(η — I)、η的接收,如果在设定时间Tm接收到分组(η—1)、η,则将它们转发给上位层。 Then, the window state becomes the state shown in (4), the mobile station 14 waits for a packet (η - I) in this state, [eta] is received, if the received packet (η-1), η at a set time Tm, they will be forwarded to the upper layer. 但是,如果在设定时间Tm的期间内未接收到分组(η - 1)、η,则移动站14将保存在缓存器BF2中的分组m及之后的分组转发给上位层,转移到切换前的通常控制。 However, if not received within a set time period Tm of the packet (η - 1), η, the mobile station of the packet m 14 stored in the buffer BF2, and the packet forwarding after the upper layer is transferred to the switch the normal control. 如上所述,通过将跳跃分组排除在外地执行上述窗口控制,能够执行针对分组n-5〜分组η的重排序处理。 As described above, by performing the above-described negative jumping window control packet in the field, capable of performing the reordering process for the packets n-5~ η of packets.

[0125] 另外,在窗口控制中,移动站14在接收到比窗口左端的序列号更小的序列号的分组的情况下,丢弃该分组。 [0125] Further, the window control, the mobile station 14 in a case where the received packet sequence numbers less than the sequence number of the left end of the window, the packet is discarded. 此外,移动站14在接收到比窗口右端的序列号更大的序列号的分组时,将该窗口右端的序列号设为该分组的序列号,将窗口左端的序列号变更为由窗口缓存器大小决定的编号,同时将从该窗口范围内弹出的已接收分组传递给上位层。 In addition, the mobile station 14 upon receiving the packet sequence number than the right end of the window of a larger sequence number, the sequence number is set to the window right end of the packet sequence number, the sequence number is changed by the left end of the window buffer window size determines the number, but from the pop-up window range received packet is transmitted to the upper layer.

[0126] 如果对跳跃分组也应用了窗口处理,则在接收到分组m的时刻,窗口状态例如变成窗口左端为n-2,窗口右端为m。 [0126] If the jump window processing packets also applied, at the time of packet m is received, the window state becomes, for example the left window is n-2, the right end of the window is m. 在该情况下,移动站放弃尚未接收到的分组n-5、n-3的接收,将已接收分组n-4、n-2转发给上位层。 In this case, the mobile station has not received the abandoned packet n-5, n-3 is received, the received packets n-4, n-2 forwarded to the upper layer. 然后,将窗口右端的序列号设定为m,将窗口左端的序列号设定为由窗口大小决定的编号n-1,之后等待分组n-1、分组n、分组n+1、…、分组m-Ι的到来。 Then, the right end of the window is set to the sequence number m, the sequence number set to the left end of the window by the window size determines the number of n-1, after waiting for packet n-1, packet n, packet n + 1, ..., packet m-Ι of arrival. 但是,在这之中,分组n+1〜分组m-1是实际上不存在的分组,因此,徒劳地等待了这些分组的接收,导致分组处理发生问题。 However, in these, the packet n + 1~ packet m-1 are packets that do not exist practically, therefore, futile waiting reception of these packets, resulting in the packet processing problems.

[0127] •基站的结构 [0127] Structure of a base station •

[0128] 图5是基站的结构图,示出了缓存部、调度部、收发部以及控制部。 [0128] FIG. 5 is a block diagram of a base station, a buffer unit illustrated, the scheduling unit, a transceiver unit and a control unit.

[0129] 缓存部21是用于存储从上级站进入的分组以及从相邻基站(移动源基站)转发来的分组的存储器。 [0129] The buffer unit 21 is a memory for storing incoming packets from the host station and forwarded from an adjacent base station (source base station) to the packet. 在该图中,在物理结构上设有两个缓存器21a、21b,但也可以采用在物理结构上只设置一个存储器,从软件上进行分割利用的装置结构。 In the drawing, the physical structure is provided with two buffers 21a, 21b, may also be employed provided only on the physical structure of a memory, means for using the structure divided from software.

[0130] 调度部22从正在通信的多个移动站中选择进行无线传输的移动站,取出存储在缓存器中的该基站的分组,发回给收发部。 [0130] The scheduling unit 22 is selected from a plurality of mobile stations communicating in the wireless transmission of the mobile station, the base station extracted packets stored in the buffer is sent back to the transceiver unit. 收发部23对从调度部传输来的分组进行编码、调制处理,并利用无线方式进行实际的数据传输。 A packet transceiver unit 23 transmitted from the scheduler unit performs encoding, modulation processing, and the actual use of wireless data transmission. 此外,接收从移动站发送来的控制信号和各种数据并对其进行解调。 Further, receiving a control signal and various data transmitted from the mobile station and demodulates.

[0131] 控制部24具有缓存器管理部24a、HO控制部24b和测定控制部24c。 [0131] The control unit 24 has a buffer management unit 24a, HO control unit 24b and measurement control unit 24c. 缓存器管理部24a对存储在缓存器21中的各种分组进行管理。 Buffer management unit 24a manages various stored in the packet buffer 21. 如果在切换时执行数据交接,则至少要将存储在缓存器21b中的未得到正常接收确认(ACK)的分组转发给移动目的地基站lib。 If data transference is executed during handover, at least to the not been stored in the buffer 21b in the normal reception acknowledgment (ACK) packet to the destination mobile station lib. 另一方面,在由于数据交接而导致从移动源基站Ila转发来的分组的到达发生了延迟,从而跳跃传输从上级站2接收到的分组的情况下,在该跳跃分组的报头的type字段中记入“type = 010”。 On the other hand, in the case where due to the arrival of data transfer resulting Ila forwarded from the source base station to the packet delay occurs, so that the jump transmission of packets received from the host station 2 is, in the type field of the header of the packet skip credited to "type = 010".

[0132] HO控制部24b执行利用图23说明的切换控制,测定控制部24c收集从移动站发送来的各种测定信息,例如移动站的无线质量CQI (Channel Quality Informat1n)等。 [0132] HO control unit 24b performs switching control described with reference to FIG 23, the measurement control unit 24c of various measurement information sent from the mobile station to collect, such as radio quality CQI of the mobile station (Channel Quality Informat1n) and the like.

[0133] •移动站的结构 [0133] The structure of the mobile station •

[0134] 图6是移动站的结构图,示出了收发部31、缓存部32、重排序部33以及控制部34。 [0134] FIG. 6 is a configuration diagram of a mobile station, a transceiver unit 31 is shown, buffer unit 32, reordering unit 33 and a control unit 34. 收发部31与基站的收发部进行分组和控制信息的收发。 A transceiver unit 31 transmits and receives information packets and control the transceiver unit of the base station. 缓存部32在不能根据接收到的下位层分组来构筑RLC PDU的情况下,保存到能够构筑该RLC PDU为止,当RLC PDU构筑成功时,去除报头,作为RLC SDU (PDCP I3DU)传递给重排序部33。 The buffer portion 32 in the case of not to create RLC PDU data according to lower layer packets received, saved to be able to build up to the RLC PDU, when the RLC PDU constructed successfully remove header is passed to the reordering as RLC SDU (PDCP I3DU) 33. 重排序部33具有用于按照序列号顺序对rocp PDU进行重新排列并将其传递给上位层的功能。 Reordering unit 33 has a pair of rearranged rocp PDU and passes to the upper layer function according to the sequence number order. 重排序部33在检测到PDCP PDU的序列号发生缺失时,将之后的rocp PDU保存在内置存储器中,直到接收到序列号连续的rocp pdu为止。 Reordering unit 33 detects the sequence number of the PDCP PDU deletion, after the rocp PDU stored in the internal memory, until receiving a continuous sequence number rocp pdu. 但是,在经过了规定时间该rocp pdu仍然未到达的情况下,重排序部停止重排序处理,将所存储的所有rocp PDU传递给上位层。 However, in a case where the predetermined time has elapsed rocp pdu still not arrived, the reordering unit stops the reordering processing, transmitting all of the stored rocp PDU to the upper layer. 此外,重排序部33在进行重排序时,进行窗口控制,使得所处理的数据量不超过允许量。 Further, when performing the reordering unit 33 reorders for window control, so that the amount of data being processed does not exceed the allowable amount.

[0135] 控制部34具有测定部34a、重排序管理部34b以及重新发送管理部34c。 [0135] The control unit 34 includes a measurement unit 34a, reordering management unit 34b and the re-transmission management unit 34c. 测定部34a测定发送给基站的各种测定信息。 Measuring portion 34a determine various measurement information sent to the base station. 例如,测定移动站的无线质量CQI(Channel QualityInformat1n)。 For example, the mobile station measures the radio quality CQI (Channel QualityInformat1n). 重排序管理部34b对重排序部33进行控制,在重排序部33所保存的HXPPDU发生了编号缺失的情况下,指示等待编号连续的HXP PDU的到达。 33 for a case where the reordering management unit 34b controls reordering unit, the number occurrence of missing in the reordering unit 33 HXPPDU stored, and waits for the arrival indicating consecutive numbers of HXP PDU. 此外,当该分组的到达等待时间经过了规定时间时,指示重排序部33停止重排序,并且指示去除所保存的所有PDCP PDU的报头,作为rocp SDU传递给上位层,从而处于可接收新rocp PDU的状态。 Further, when reaching the packet waiting time has elapsed the predetermined time, indicating the reordering unit 33 to stop reordering, and indicating remove all PDCP PDU header stored, transmitted to the upper layer as rocp SDU, so that in may receive new ROCP PDU status. 然后,重排序管理部34b将到此为止接收的最大序列号设定为窗口右端的序列号,并通过考虑窗口大小来决定并设定窗口左端的序列号。 Then, the reordering management unit 34b largest sequence number received so far is set to the serial number of the right end of the window, and determines and sets the sequence number of the left end of the window by considering the window size. 这里,如果存在序列号比窗口左端的序列号更小的已接收分组,则直接将该分组转发给上位层。 Here, if the sequence number smaller than the sequence number of the left end of the window has been received packet, the packet is forwarded directly to the upper layer. 重新发送管理部34c在重新发送控制时,按照虚线所表示的路径通过收发部向基站发送重新发送请求信号。 Re-transmission management unit 34c when the retransmission control, to the base station according to the path indicated by the broken line resending request signal receiving unit.

[0136].移动目的地基站的动作 [0136] The operation of the target base station

[0137]图7是第I实施例的移动目的地基站的动作流程图。 [0137] FIG. 7 is a flowchart of Example I of the embodiment of the target base station.

[0138] 移动目的地基站I Ib的切换控制部24b在从移动源基站I Ia接收到HO请求(包含移动站ID和QoS信息等)时(步骤201),根据这些信息进行呼叫接入控制,判断是否允许接入移动站(步骤202)。 [0138] I Ib target base station switching control unit 24b at the (step 201) received from the source base station I Ia HO request (including mobile station ID and QoS information, etc.), call admission control based on this information, determine whether to allow access to the mobile station (step 202). 如果不允许则进行后处理(步骤213),并结束切换控制。 If, after the processing is not allowed (step 213), and ends handover control.

[0139] 另一方面,切换控制部24b在允许接入移动站的情况下,向移动源基站Ila回复HO请求响应消息(步骤203)。 [0139] On the other hand, the switching control unit 24b in the case of unpermitted mobile station to the source base station replies Ila HO request response message (step 203). 然后,移动目的地基站Ilb等待从移动源基站Ila转发来的分组,之后,缓存部21在接收到从移动源基站Ila转发来的分组时将其存储起来(步骤204)。 Then, the target base station from the source base station waits Ilb Ila packets forwarded, after the buffer unit 21 upon receiving a packet to be forwarded from the source base station will be stored and Ila (step 204).

[0140] 在该状态下,切换控制部24b在从移动站14接收到HO完成的报告时(步骤205),向上级站12发送HO完成的报告(步骤206)。 [0140] In this state, the switching control unit 24b at the time of the report (step 205) received from the mobile station 14 to report the completion of HO, HO complete to the host station 12 transmits (step 206). 上级站在接收到切换完成的报告时,将分组的传输路径从移动源基站Ila切换到移动目的地基站11b,并向移动目的地基站Ilb回复HO完成响应。 When the upper stand of the handover completion report is received, the packet transmission path from the handover source base station to the target base station Ila 11b, and return the target base station HO completion response Ilb. 移动目的地基站Ilb的切换控制部24b在从上级站12接收到HO完成响应时(步骤207),向调度部22指示开始发送分组(步骤208)。 Ilb handover target base station when the control portion 24b (step 207) from the host station 12 receives the HO completion response, indicating the scheduling unit 22 to start transmitting packets (step 208).

[0141] 由此,调度部22检查是否需要进行分组跳跃传输(步骤209),如果不需要,则向移动站14优先发送从移动源基站Ila转发来的分组(步骤210)。 [0141] Accordingly, the scheduler unit 22 checks whether jump transmission of packets is required (step 209), if not, then transmitted from the source base station Ila packets forwarded (step 210) to the mobile station 14 preferentially. 但是,如果来自移动源基站Ila的分组的转发出现延迟从而需要进行分组跳跃传输,则调度部22执行从上级站12接收到的分组的跳跃传输。 However, if the forwarding packets from the source base station thereby requiring a delay of Ila group jump transmission, the scheduler unit 22 executes jump transmission received from the host station 12 to the packet.

[0142] 在执行跳跃传输时,将要进行跳跃传输的分组的type字段的类别号设定为010(type = 010),使移动站14能够识别出该分组是跳跃传输分组(步骤211),然后向移动站14传输该分组(步骤210)。 Category number set type field [0142] When performing jump transmission will be grouped hop transmission is 010 (type = 010), so that the mobile station 14 can recognize that the packets are jump transmission of packets (step 211), then the mobile station 14 to transmit the packet (step 210).

[0143] 与以上处理并行地,切换控制部24b向移动源基站Ila发送资源释放消息(步骤212 ),执行后处理(步骤213 ),结束切换控制。 [0143] In parallel with the above processing, the handover control unit 24b transmits to the movement origin base Ila resource release message (step 212), performs post processing (step 213) and ends handover control.

[0144].移动源基站的动作 [0144] The operation of a mobile source base station

[0145]图8是第I实施例的移动源基站的装置动作流程图。 [0145] FIG 8 is a flowchart of the operation of the source base station I of embodiment of the device.

[0146] 在图8中,移动源基站Ila的测定控制部24a在通过测定报告而从移动站14接收到接收状态信息时(步骤251),根据该接收状态信息判断是否需要进行切换(Hand Over:OH)(步骤252),如果不需要进行切换,则返回到始点。 (Step 251) [0146] In FIG. 8, the mobile source base station Ila measurement control unit 24a in the received from the mobile station 14 to the receiving state information measurement report, determining information based on the reception state whether a shift (Hand Over : OH) (step 252), if the switch is not required, the process returns to the start point.

[0147] 但是,当确定为需要进行切换HO时,切换控制部24b根据测定报告的内容来确定移动目的地基站11b,向该移动目的地基站Ilb发送切换请求(步骤253)。 [0147] However, when it is determined that handover HO is necessary, the handover control unit 24b determines the handover target base station 11b according to the contents of the measurement report, to the target base station transmits a handover request Ilb (step 253).

[0148] 然后,在接收到从移动目的地基站Ilb发送来的HO响应消息时(步骤254),HO控制部24b向移动站14发送HO指示消息(步骤255),指示缓存管理部24a向移动目的地基站Ilb转发(分组转发)剩余在缓存器21中的分组。 [0148] Then, at the time (step 254) receiving the HO Ilb transmitted from the target base station in response to the message, HO control unit 24b sends a HO instruction message the mobile station 14 (step 255), indicating the buffer management unit 24a to the mobile Ilb target base station forwards (packet forwarding) packets in the buffer 21 remains. 由此,缓存管理部24a通过虚线的路径向移动目的地基站Ilb转发(forwarding)缓存器21b中存在的未发送到移动站14的分组或未被正常接收的分组(NACK分组)(步骤256)。 Thus, the buffer management unit 24a forwards the dotted line path through the target base station Ilb (forwarding) in the presence of buffer 21b is not transmitted to the mobile station 14 or a packet not normally received packet (NACK packet) (step 256) . 之后,接收从移动目的地基站Ilb发送来的资源释放消息(步骤257),执行资源释放(步骤258)。 After receiving the transmission from the target base station resources to Ilb release message (step 257), performs a resource release (step 258).

[0149].移动站的动作 [0149] The operation of the mobile station

[0150] 图9是移动站的动作流程图。 [0150] FIG. 9 is a flowchart showing the operation of the mobile station.

[0151] 移动站14的测定部34a通过测定报告向移动源基站Ila通知接收状态等(步骤271)。 Determination unit [0151] 14 of the mobile station 34a notifies the reception status (step 271) by the source base station to the mobile measurement report Ila. 之后,控制部34等待从移动源基站Ila发送来的HO指示消息,当接收到HO指示消息时(步骤272),通过L1/L2信令来确保与移动目的地基站Ilb保持同步(步骤273),在确保了同步之后,向移动目的地基站Ilb发送切换完成的报告(步骤274)。 Thereafter, the control unit 34 waits for transmission from the source base station HO Ila to the indication message, when (step 272) receiving the HO instruction message, through the L1 / L2 signaling to the target base station Ilb ensure synchronized (step 273) , to ensure the synchronization, transmits the handover completion report (step 274) to the target base station Ilb. 然后,控制部34检查所接收到的分组是否为跳越分组,换言之,检查是否为type=010的分组(步骤275),如果是跳跃分组,则将其排除在重排序对象之外并将其保存在缓存器32中,在经过设定时间后,去除报头而设定成HXP SDU分组传递给上位层(步骤276)。 Then, the control unit 34 checks whether the received packet is a jump packet, in other words, checks whether the packet 010 (step 275) is type =, if the packet is skipped, and then it is excluded outside the object of reordering stored in the buffer 32, after a set time is set to remove the header HXP SDU packet is transmitted to the upper layer (step 276). 另一方面,如果不是跳跃分组,则执行重排序,按照顺序重新排列,然后作为HXP SDU传递给上位层(步骤277)。 On the other hand, if it is not a jump packet, the reordering performed, rearranged in order, and then passed to the upper layer (step 277) as HXP SDU.

[0152] 图10是移动站的重排序处理流程。 [0152] FIG. 10 is a reordering process flow of the mobile station.

[0153] 当移动站的收发部31从移动目的地基站Ilb接收到下位层分组时(步骤301),重排序管理部34b检查能否构筑RLC PDU (步骤302),在不能构筑时,检查是否经过了设定时间(步骤303),在尚未经过设定时间时,将该下位层分组保存在缓存器32中(步骤304),进行步骤301及其之后的处理。 [0153] When (step 301) the transceiver unit 31 of the mobile station from the target base station receives lower layer packets to Ilb, reordering management unit 34b checks whether the constructed RLC PDU (step 302), and can not be constructed, to check whether set time elapses (step 303), when the predetermined time has not elapsed, the lower layer packets stored in the buffer 32 (step 304), processing of and after step 301. 当在接收到下位层分组之后经过了设定时间仍然不能构筑RLC PDU时,从缓存器中删除下位层分组(步骤305)。 When receiving the lower layer after a set time elapses packet still can not build RLC PDU, the lower layer packet is deleted (step 305) from the buffer.

[0154] 另一方面,当在步骤302中能够使用接收到的下位层分组构筑RLC PDU时,将该RLC PDU作为RLC SDU (H)CP I3DU)而传递给重排序部33 (步骤306)。 [0154] On the other hand, it can be used when the lower layer received in step 302 to create RLC PDU data packet when the RLC PDU RLC SDU (H) CP I3DU) is transmitted to the reordering unit 33 (step 306) a. 重排序部33在接收到RLC SDU (PDCP I3DU)时,检查是否存在序列号缺失(步骤307),如果序列号不存在缺失而是连续的,则删除该RLC SDU (PDCP I3DU)的报头将其设定成TOCP SDU传递给上位层(步骤311)。 Reordering unit 33 upon receiving the RLC SDU (PDCP I3DU), checks whether there is a missing sequence number (step 307), if a missing sequence number is not present but continuously, then remove the RLC SDU (PDCP I3DU) header which It is set to be transmitted TOCP SDU to the upper layer (step 311). 但是,如果序列号存在缺失,则重排序管理部34b指示重排序部33使其保存HXPPDU (步骤308)。 However, if there is a missing sequence number, the reordering management unit 34b indicating the reordering unit 33 to save it HXPPDU (step 308). 由此,重排序部33保存HXP PDU,并检查是否接收到序列号连续的RLCSDU (PDCP PDU)(步骤309)。 Thereby, the reordering unit 33 to save HXP PDU, and checks whether the received RLCSDU consecutive sequence numbers (PDCP PDU) (step 309). 如果接收到序列号连续的RLC SDU (H)CP PDU),则将该RLCsdu (PDCP rou)作为rocp sdu传递给上位层,并将所保存的rocp pdu传递给上位层(步骤311)0 If a continuous sequence number is received RLC SDU (H) CP PDU), then transfers the RLCsdu (PDCP rou) transmitted to the upper layer as rocp sdu, and stored rocp pdu to the upper layer (step 311) 0

[0155] 此外,如果在步骤309中未接收到序列号连续的RLC SDU(PDCP PDU),则监视是否经过了预定时间Tm(步骤310),如果尚未经过预定时间Tm则重复步骤308及其之后的处理,而当经过了设定时间Tm时,即使序列号不连续,也将所保存的HXPPDU传递给上位层(步骤311)0 [0155] Further, if the sequence number is not received in step 309 consecutive RLC SDU (PDCP PDU), monitors whether the predetermined time Tm has elapsed (step 310), then step 308 is repeated if it is not a predetermined elapsed time Tm and processing, when the predetermined time has elapsed Tm, even if the sequence numbers are not continuous the saved HXPPDU transmitted to the upper layer (step 311) 0

[0156] 如上所述,根据第I实施方式,可以将从上级站12向移动目的地基站Ilb传输来的分组作为跳跃分组、在不进行等待的情况下将其传输给移动站14,从而能够消除数据的延迟时间,能够提高系统整体的吞吐量。 [0156] As described above, according to the embodiment I, it can be from the host station 12 to the target base station to transmit packets Ilb as jump packets, without waiting for its transmission to the mobile station 14, thereby elimination of delay time data, it is possible to improve the throughput of the entire system. 此外,移动站14从重排序控制(顺序控制)的对象中排除跳跃分组,对跳跃分组之外的分组进行顺序控制,按照序列号顺序将分组传递给上级装置。 Further, the target mobile station 14 from reordering control (order control) in the negative jump packets, packets other than jump packets of sequence control, passes the packet to the host device in accordance with the sequence numbers. 其结果,移动站即使只具有一个顺序控制功能,也能够进行分组的顺序控制。 As a result, even if the mobile station has only a sequence control function, it is possible to sequentially control group.

[0157] (C)第2实施例 [0157] (C) Example 2

[0158] 在第I实施例中,移动站14在设定时间Tm期间进行重排序处理,当经过了设定时间Tm时,结束重排序处理(图10中的步骤310)。 [0158] embodiment, the mobile station 14 performs the reordering process during a set time Tm I of embodiment, when the setting time Tm has elapsed, the reordering process ends (FIG. 10 step 310). 因此,移动站14在接收到从移动源基站Ila向移动目的地基站Ilb转发的所有分组之后,如果仍然未经过设定时间TM,则继续执行重排序处理。 Thus, the mobile station 14 after receiving all the packets forwarded from the source base station to a target base station Ila Ilb, if the predetermined time has not elapsed yet (TM), the reordering process continues. 在此,在第2实施例中,为了使移动站14能够识别出重排序处理对象中的最后的分组,移动目的地基站Ilb对规定分组(最后的分组)附加识别符并传输到移动站,移动站14在接收到该最后的分组时,即使尚未经过设定时间Tm也会立即结束重排序处理。 Here, in the second embodiment, in order that the mobile station 14 can recognize the last packet reordering process object, the target base station Ilb predetermined packet (last packet) and the additional identifier to the mobile station, the mobile station 14 upon receiving this last packet, even before the set time Tm will immediately ends the reordering process.

[0159]图11是第2实施例的说明图,设为在切换前,在移动源基站Ila中存储有分组n-5〜n,这些分组中的分组n-5〜n_2已经被发送到移动站14,但分组n_l和η未被发送到移动站14。 [0159] FIG. 11 is an explanatory view of a second embodiment, it is assumed before the handover, the source base station stores the packet Ila n-5~n, these packets n-5~n_2 packets has been transmitted to the mobile station 14, the packet n_l η and 14 are not transmitted to the mobile station. 例如,由于分组n-Ι和η是在切断移动源基站Ila与移动站14之间的无线线路之后才到达,因此这些分组n-Ι和η未被发送到移动站14。 For example, since the packet n-Ι and η is the cut Ila source base station and the mobile station only after reaching the wireless line 14 between, so these packets n-Ι η and not sent to the mobile station 14. 此外,设为向移动站发送的分组中的分组n-5、n-3未被移动站14正确接收到(NACK),而分组n_4、n-2被正常接收到(ACK)0因此,移动站14保存分组n-4、n-2,而没有保存分组n-5、n-3。 Moreover, packets n-5 to packet transmitted to the mobile station, n-3 has not been correctly received by mobile station 14 (NACK), and packets n_4, n-2 is normally received (ACK) 0 Thus, the mobile station 14 saves packets n-4, n-2, but not save packets n-5, n-3.

[0160] 在该状态下,当发生切换时,移动源基站Ila向移动目的地基站Ilb转发(forwarding)未被移动站14正常接收的分组n_5和n_3以及未发送到的分组η_1、η。 [0160] In this state, when the handover occurs, the source base station to the target base station forwards Ila Ilb (forwarding) the mobile station 14 has not been normally received packets and a packet n_5 n_3 and not sent to the η_1, η. 此外,上级站12在切换后向移动目的地基站I Ib发送两个分组m〜m+1。 In addition, the host station 12 transmits two packets m~m + 1 after a handover to the target base station I Ib. 其中,设分组n_5〜η的转发(forwarding)发生了延迟。 Wherein forwarding the provided packet n_5~η (Forwarding) a delay occurs.

[0161] 移动目的地基站Ilb如果在从移动源基站Ila转发来分组n_5、n_3、n_l〜η之前从上级站12接收到分组m、m+l,则对从该上级站接收到的分组m、m + I附加跳跃识别码F,并先将它们发送(跳跃传输)给移动站14。 [0161] If the target base station Ilb forwarded from the source base station to a packet Ila n_5, n_3, before n_l~η received from the host station 12 to the packet m, m + l, then the packet is received from the host station m , m + I additional jump ID code F, and transmits (jump transmission) to the first mobile station 14 thereof. 移动站14将从基站接收到的附加了跳跃识别码F的分组保存到缓存器BF2中,并将它们从重排序处理的对象中排除。 14 received from the base station to the mobile station added to the buffer BF2 stored in jump ID code F to the packet, and objects of the reordering process to exclude them. 图11的(A)表示移动站14在缓存器BF2中保存有分组m、m + 1,并且在切换前在缓存器BFl中保存有接收到的分组η — 4、η — 2的状态。 FIG. 11 (A) shows a mobile station 14 is stored in the buffer BF2 has packets m, m + 1, and stores the packets before switching to [eta] received in the buffer BFl in - 4, η - State 2.

[0162] 移动目的地基站Ilb在经过了预定时间Tw (称为Waiting Time (等待时间))为止将转发来的分组发送给移动站,而如果经过了等待时间,则即使接收到转发来的分组也会将其丢弃。 [0162] The target base station in a predetermined time elapses Ilb Tw (called the Waiting Time (waiting time)) until the packets will be forwarded to the mobile station, if the waiting time has elapsed, even if the received packets forwarded It will be discarded. 因此,移动基站Ilb在经过等待时间之前接收到从移动源基站Ila转发来的分组n-5、n-3、n_l,并保存在缓存器BF中并将其逐一传输给移动站。 Thus, the mobile station Ilb received before the waiting time elapsed from a source base station to the packets forwarded Ila n-5, n-3, n_l, and stored in the buffer BF and transmitting it to the mobile station one by one. 并且,设在从移动源基站Ila接收到分组η且在尚未传输给移动站的阶段中等待时间到时。 And, provided in the base station receives from the source to the packet η Ila and the waiting time to the mobile station has not been transferred to the stage. 在该情况下,移动目的地基站Ilb对分组η附加表示是转发来的最后的分组的识别符(L),并传输给移动站14。 In this case, the target base station Ilb additional representations of the packet is forwarded η last identifier (L) of the packet, and transmitted to mobile station 14.

[0163] 移动站14将从移动目的地基站I Ib接收到的分组η-5、η-3、η-1、η保存在缓存器BFl中,如图11 (B)所示,对这些分组和切换前接收到的分组η-4、η-2执行重排序处理,进行重新排列。 [0163] the mobile station from the target base station 14 receives the packet I Ib η-5, η-3, η-1, η stored in the buffer BFl in FIG. 11 (B), the packets of these and before switching the received packet η-4, η-2 performs the reordering process, rearranged. 此外,当检测到附加给分组η的识别符(L)时,判断为转发结束,即使重排序的设定时间Tm尚未到时,也将已经重排序的分组传递给上位层,结束重排序处理。 Further, when detecting the identifier added to the packet of η (L), is determined to forward end, even if the set time has not been reordered to Tm, also it has been reordered packet to the upper layer and ends the reordering process .

[0164] 上面是在发送分组η之前等待时间到时的情况,但还存在在将分组η传输到移动站之后的阶段中等待时间到时的情况。 [0164] The above is the case when the time to wait before sending the packet η, but there is also the case when the waiting time in the stage after the transmission of the packet to the mobile station [eta]. 在该情况下,移动目的地基站Ilb对从上级站12接收到的分组m+2附加表示是最后的分组的识别符(L),并传输给移动站14。 In this case, the target base station Ilb received from the host station 12 to the packet m + 2 represents the additional identifier is the last (L) packet, and transmitted to mobile station 14. 接收到附加了该识别符的最后的分组的移动站14判断为转发结束,即使重排序的设定时间Tm尚未到时也会立即结束重排序处理。 Receiving the last packet is added to the identifier of the mobile station 14 determines that the forward end, even when the setting time Tm has not been reordered to the reordering process will end immediately.

[0165] 此外,虽然通过转发接收到了分组n-3,不过还存在在未接收到分组nl、n的阶段等待时间到时的情况。 [0165] Further, although the received packet by forwarding the n-3, but there is also the case when the waiting time is not received packet nl, n stages. 在该情况下,移动目的地基站Ilb对分组n-3附加表示是最后分组的识别符(L),并传输给移动站14。 In this case, the target base station packet Ilb n-3 represents the additional identifier is (L) of the last packet, and transmitted to mobile station 14. 移动站14检测到附加了该识别符(L)的最后的分组而结束重排序处理。 The mobile station 14 detects that the additional identifier (L) of the last packet and ends the reordering process.

[0166].最后分组识别码L [0166] The last packet ID code L

[0167] 在对分组附加表示是最后的识别符(最后分组识别码)时,使用HXP PDU的报头中包含的3比特的“type”字段。 [0167] When the packet is the last represented additional identifier (last packet ID code), using the "type" field of the header of 3 bits HXP PDU contained. 即,在该“type”字段中将新的type编号定义为最后分组识别码L,并将该type编号分配给经过等待时间之后最先发送的分组。 That is, the new type number in the definition of the "type" field is the last packet ID code L, and that type number is assigned to the packet waiting time has elapsed after the first transmission. 图12是TOCP PDU的格式例,(A)是无报头的格式例,(B )是未附加I3DCP PDU的序列号的格式例,(C)和(D )是附加了HXP PDU的序列号的格式例。 FIG 12 is a format example TOCP PDU is, (A) is an example of format without a header, (B) is an example of the format of the serial number I3DCP PDU is not added, (C) and (D) is added HXP PDU sequence number format example. 在(C)和(D)的格式中,在报头HD中定义了type字段和PID字段,用type字段表示HXP PDU的类别。 In (C) format and (D), the definition of the type field and the PID field in the header HD, the category represents HXP PDU with the type field. 在type字段中,已规定了“type = 000”和“type = 001”,而未规定且未使用“type = 010〜111”。 In the type field, has specified "type = 000" and "type = 001", and not without stipulating the use of "type = 010~111". 因此,例如利用“type = 011”,作为用于识别在经过等待时间之后最先发送的HXPPDU分组(最后的分组)的type号。 Thus, for example, using "type = 011", as a number for identifying the type HXPPDU packet (last packet) after a waiting time after the first transmitted.

[0168].PDCP层和RLC层的处理 [0168] The processing layer and the RLC layer .PDCP

[0169] 图13、图14是切换后的HXP层和RLC层的分组处理的说明图。 [0169] FIG 13, FIG 14 is a view illustrating a packet processing after switching HXP layer and RLC layer.

[0170] 图13表示对向移动站传输的分组η附加了最后分组识别码L的情况。 [0170] FIG. 13 shows the mobile station of the packet transmission η added L is the last packet ID code. 移动站14在重排序时起动定时器以判定重排序的结束。 The mobile station 14 starts a timer to determine when reordering ends reordering. 这里,在将设定时间Tm设定成较大的值的情况下,与分组η是否是所转发的最后的分组无关地,继续进行重排序处理,在设定时间Tm到时之前不能将分组发回到上位层。 Here, when the setting time Tm is set to a larger value, and η is the last packet of packets forwarded regardless continues the reordering process, the packet can not be set until the time when Tm back to the upper layer. 但是,在第2实施例中,移动站14在接收到附加了最后分组识别码L的分组η (最后的分组)时,立即结束重排序,将所有的HXP PDU分组发回到上位层。 However, in the second embodiment, the mobile station 14 upon receiving the last packet ID code added L [eta] of the packet (last packet), the reordering ends immediately, all HXP PDU packet back to the upper layer.

[0171] 此外,防备于到来了所能允许的数据量以上的数据的情况,移动站14在重排序时进行窗口控制。 [0171] Further, preparedness, the mobile station 14 performs window control during reordering in the case where the arrival of more data amount of data can be tolerated. 窗口的左端为所期待到达的编号n-5,窗口的右端是作为所能允许的数据量的上限的值(图中为η)。 To the left of the window reaches the expected number n-5, the right end of the window as the amount of data allowed for the value of ([eta] in the figure) the upper limit. 但是,如实施例1所示,没有对“type = 010”的分组应用窗口处理。 However, the embodiment as shown in Example 1, no "type = 010" a packet processing application window. 通过这种处理,能够执行针对分组n-5〜分组η的重排序。 Through this process, the reordering can be performed for the packet grouping η n-5~.

[0172] 图14表示对分组m+2附加了最后分组识别码L的情况。 [0172] FIG. 14 shows the packet m + 2 L is added last packet identifier. 移动站14在接收到分组m+2 (最后的分组)的时刻,即使设定时间Tm尚未到时,也会立即结束重排序,将已接收的所有HXP PDU分组发回到上级层。 All HXP PDU mobile station 14 at the time of receiving the packet m + 2 (Last packet), even when the setting time Tm has not yet, will immediately ends reordering the received packets back to the upper layer. 此外,与图13同样地执行窗口控制。 Further, also perform window control 13 of FIG.

[0173].移动目的地基站的动作 [0173] The operation of the target base station

[0174]图15是第2实施例的移动目的地基站的动作流程图,对与第I实施例的图7中的步骤相同的步骤赋予相同的标号。 [0174] FIG. 15 is a flowchart showing the operation of the second embodiment of the embodiment of the target base station, in step 7 of Example I and the same steps are assigned the same reference numerals. 第2实施例中的基站、移动站具有图5、图6所示的结构。 The second embodiment of the base station, the mobile station having the configuration shown in FIG. 5, FIG. 6.

[0175] 移动目的地基站I Ib的切换控制部24b在从移动源基站I Ia接收到HO请求(包含移动站ID和QoS信息等)时,根据这些信息来进行呼叫接入控制,判断是否允许接入移动站。 [0175] I Ib target base station switching control unit 24b is received from the source base station I Ia HO request (including mobile station ID and QoS information, etc.), in accordance with the access information to call control, determine whether to allow access to the mobile station. 如果不允许,则执行后处理,然后结束切换控制(步骤201〜202、213)。 If not, then performs post-processing, and ends handover control (step 201~202,213).

[0176] 另一方面,在切换控制部24b允许接入移动站14的情况下,向移动源基站Ila回复HO请求响应消息,并开始对经过时间进行计时。 [0176] On the other hand, in the case where the handover control unit 24b allows access for the mobile station 14, the source base station to a HO request response message reply Ila, and starts counting elapsed time. 然后,移动目的地基站Ilb等待从移动源基站Ila转发来的分组,并将该分组存储在缓存部21中(步骤203〜204)。 Then, the target base station for forwarding Ilb Ila from a source base station to the packet and the packet is stored in the cache unit 21 (step 203~204).

[0177] 在该状态下,切换控制部24b在从移动站14接收到HO完成的报告时,将HO完成的报告发送给上级站12 (步骤205〜206)。 [0177] In this state, the switching control unit 24b upon receiving from the mobile station 14 to the HO completion report, and transmits the HO completion report to the host station 12 (step 205~206). 上级站12在接收到切换完成的报告时,将分组传输路径从移动源基站Ila切换到移动目的地基站11b,向移动目的地基站回复HO完成响应。 Superordinate station 12 upon receiving the handover complete report, the packet transmission path from the handover source base station to the target base station Ila 11b, replies HO completion response to the movement destination base station. 移动目的地基站Ilb的切换控制部24b在从上级站接收到HO完成响应时,指示调度部22开始发送分组(步骤207〜208)。 Ilb target base station switching control unit 24b upon receiving from the host station in the HO completion response, indicating the scheduling unit 22 starts transmitting the packet (step 207~208).

[0178] 接着,调度部22监视经过时间是否超过了设定时间Tw,即,等待时间是否到时(步骤501 ),如果等待时间尚未到时,则检查是否需要进行分组的跳跃传输(步骤209),如果不需要,则从移动目的地基站Ila所转发来的分组开始将其优先发送给移动站14(步骤210)。 [0178] Next, the scheduler unit 22 monitors the elapsed time exceeds the set time Tw, i.e., whether the time to wait (step 501), if the waiting time has not, it is checked whether jump transmission of packets (step 209 ), if not, the target base station from the packets forwarded Ila starts sending its priority to the mobile station 14 (step 210). 但是,当转发出现延迟从而需要进行分组的跳跃传输时,调度部22执行从上级站22接收到的分组的跳跃传输。 However, when forwarding delays requiring jump transmission of packets, the scheduler unit 22 executes jump transmission received from the host station 22 to the packet. 为了执行跳跃传输,将要跳跃传输的分组报头的type字段的类别号设定为010 Ctype=OlO),使得移动站14能够识别出该分组是跳跃分组,然后将该分组传输给移动站(步骤210)。 Category number is set in order to perform jump transmission will be a jump packet header transmission type field of 010 Ctype = OlO), such that the mobile station 14 can recognize that the packets are jump packets, then the packet is transmitted to the mobile station (step 210 ).

[0179] 与以上处理并行地,切换控制部24b向移动源基站Ila发送资源释放消息(步骤212),返回步骤501,检查等待时间是否已到时,如果尚未到时,则重复执行步骤209及之后的处理。 When [0179] the above processing in parallel, the handover control unit 24b transmits to the movement origin base Ila resource release message (step 212), returns to step 501, to check whether the wait time is reached, if not already to, repeat step 209 and after treatment.

[0180] 另一方面,如果在步骤501中等待时间到时,则在等待时间到时之后立刻将传输的分组的type号设定成“011”。 [0180] On the other hand, if the wait time in the step 501, when the waiting time is immediately after the transmission of the packet type number set to "011." S卩,在到时后立刻对所要传输的分组附加最后分组识别码L,并将该分组(最后的分组)传输给移动站(步骤502〜503),然后进行后处理,结束切换控制(212 〜213)。 S Jie, immediately the last packet of the packet identification code attached to be transmitted to the rear in L, and the packet (last packet) transmitted to the mobile station (step 502~503), and post-processing, and ends handover control (212 ~213).

[0181] 另外,在步骤502中,为了能够识别出附加了最后分组识别码L的最后的分组是从移动源基站Ila转发来的分组,还是从上级站12接收到的分组,在为前者的情况下将type号设定为“011”,在为后者的情况下将type号设定为“100”。 [0181] Further, in step 502, in order to identify the additional packet received from the host station 12 to the last packet last packet ID code L is for packet forwarding from the source base Ila, or, for the former the case where the type is set to number "011" in the case of the latter type is set to number "100." 这样就使后述的移动站14的重排序处理变得容易。 This allows reordering later the mobile station 14 is easy to handle.

[0182].移动站的动作 [0182] The operation of the mobile station

[0183] 图16是移动站的动作流程图,对与图8中的动作流程相同的步骤标注相同标号。 [0183] FIG. 16 is a flowchart showing the operation of the mobile station, the operation of FIG. 8 in the same process steps denoted by the same reference numerals. 移动站的测定部34a通过测定报告向移动源基站Ila通知接收状态等。 Measuring portion 34a of the mobile station reception status notification to the source base station through a measurement report Ila. 之后,控制部34等待从移动源基站发送来的HO指示消息,当接收到HO指示消息时,通过L1/L2信令来确保与移动目的地基站Ilb保持同步,在确保了同步之后,向移动目的地基站发送切换完成的报告(步骤271〜274)。 Then, after the control unit 34 waits transmitted from the source base station HO instruction message, when receiving the HO instruction message, through the L1 / L2 signaling to the target base station Ilb ensure synchronized, to ensure synchronization, the mobile report (step 271~274) the target base station sends the handover completion.

[0184] 然后,控制部34检查所接收到的分组是否为跳越分组,换言之,检查是否为type=010的分组(步骤600),如果是跳跃分组,则将该分组排除在重排序对象之外并将其保存在缓存器32中(步骤601)。 [0184] Then, the control unit 34 checks whether the received packet is a jump packet, in other words, check whether the packet type = (step 600) 010, if it is a jump packet, the packet is excluded from the objects of the reordering outer and stored in the buffer 32 (step 601).

[0185] 另一方面,如果不是跳跃分组,则检查所接收到的分组是否为最后的分组,换言之,检查是否为type=011的分组(步骤602)。 [0185] On the other hand, if it is not a jump packet, it is checked whether the received packet is the last packet, in other words, checks whether the packet 011 is type = (step 602). 如果不是最后的分组,则开始重排序,并按顺序对rocp pdu分组进行重新排列,生成rocp sdu传递给上位层(步骤603)。 If not the last packet, the reordering starts, according to the order of the packets are rearranged rocp pdu, generating rocp sdu passed to the upper layer (step 603).

[0186] 然后,检查预定时间Tm是否到时(步骤604),如果设定时间Tm尚未到时,则重复步骤600及之后的处理,而如果设定时间Tm到时,则结束重排序处理,然后从尚未传递给上位层的rocp PDU分组中删除报头而生成rocp sdu,并将其传递给上位层(步骤605)。 [0186] Then, (step 604) to check whether a predetermined time Tm, Tm if the time has not been set to repeat steps 600 and after the processing, whereas if the time Tm is set, then the reordering process ends, then remove the header from the packet rocp PDU not yet delivered to the upper layer to generate rocp sdu, and passes it to the upper layer (step 605). 接着,将重排序对象之外的分组传递给上位层而结束处理(步骤606 )。 Next, the packet transmitted outside the object of reordering to the upper layer and ends the processing (step 606).

[0187]另一方面,在步骤602中,如果所接收到的分组是最后的分组,则立刻停止重排序处理(步骤607)。 [0187] On the other hand, in step 602, if the received packet is the last packet, the reordering process is stopped immediately (step 607). 此时,如果最后的分组是转发来的分组,则通过该最后的分组生成rocpSDU分组并传递给上位层,停止重排序。 At this time, if the last packet is forwarded to the packet, the packet generated by the rocpSDU last packet and passed to the upper layer to stop reordering. 此外,如果最后的分组是从上级站12接收到的分组,则立刻停止重排序,将该最后的分组接在重排序对象之外的分组的最后。 Further, if the last packet was received from the host station 12 to the packet, then immediately stops reordering, then the last packet of the last packet in the object of reordering. 然后,将重排序对象之外的分组传递给上位层而结束处理(步骤606 )。 Then, the packet transmitted outside the object of reordering to the upper layer and ends the processing (step 606).

[0188] 如上所述,根据第2实施例,移动站是参照最后分组识别码来检测转发结束的情况,由此能够立即停止重排序。 [0188] As described above, according to the second embodiment, the mobile station is the last reference packet identification code detected forward end of the case, whereby the reordering can be stopped immediately. 因此,能够消除数据的延迟时间,提高系统整体的吞吐量。 Thus, the delay time data can be eliminated, improving overall system throughput.

[0189] (D)第3实施例 [0189] (D) of Example 3

[0190] 到此为止所示出的顺序信息(序列号n、m)是为了便于说明而利用的简单编号,而实际上顺序信息是由基站附加的。 [0190] Sequence information shown so far (SEQ ID n, m) is simply for convenience of description using the number, and order information by the base station actually attached.

[0191] 如前所示,在LTE通信系统中,转发是按照rocp SDU的数据单位来实施的。 [0191] As previously indicated, in a LTE communication system, forwarding is rocp SDU according to the embodiment of the data unit. 因此,在发生转发的情况下,无法从移动源基站Ila向移动目的地基站Ilb发送Sequence Number字段,从而需要某种方法来通知序列号(Sequence Number)。 Thus, in the case of forwarding occurs, Sequence Number field can not be sent to the movement destination base station from the source base station Ila Ilb, thus need some way to notify the sequence number (Sequence Number).

[0192] 在本实施例中,移动源基站Ila将序列号与HXP SDU数据一起通知给移动目的地基站,并且移动目的地基站基于该序列号将该序列号附加给转发来的rocp sdu数据(分组)。 [0192] In the present embodiment, the source base station notifies the sequence number Ila HXP SDU with the data to the movement destination base station and the target base station based on the serial number of the sequence number added to the data forwarded by rocp sdu ( grouping).

[0193] 图17是将rocp PDU的序列号附随在相应的HXP SDU数据(分组)中(在带内),并通过数据平面(U-Plane)进行通知的例子。 [0193] FIG. 17 is a rocp PDU sequence number appended examples corresponding HXP SDU data (packets) (in-band), and a notification via the data plane (U-Plane) of. 虽然在图17中仅仅示出了HXPSDU数据及附随于该数据的序列号SN,但是为了将该HXP SDU数据作为一组分组,还需要附加控制信息(报头信息)。 While only a HXPSDU accompanying data in FIG. 17 and the sequence number SN of the data, but to the HXP SDU data as a set of packets, but also additional control information (header information). 移动源基站Ila在每次转发HXP SDU数据时,都会按照图17的格式通知附随在该rocp SDU数据中的序列号SN,移动目的地基站I Ib基于该序列号将该序列号附加给转发来的rocp SDU数据(分组)。 Ila source base station at each forwarding HXP SDU data, the sequence number SN will notify the accompanying rocp SDU data in the format of FIG. 17, I Ib based on the serial number of the sequence number attached to the forwarding to the target base station the rocp SDU data (packets).

[0194] S卩,在图17的状况下,移动源基站I Ia首先通过数据平面U-plane转发序列号n_5和最初的HXP SDU数据。 [0194] S Jie, in the case of FIG. 17, the source base station forwards the first I Ia and SEQ ID NO n_5 initial HXP SDU data via the data plane U-plane. 然后,通过U-plane转发序列号n-3和下一个HXP SDU数据。 Then, the transfer sequence number n-3 and the next HXP SDU data via U-plane. 之后,在转发从上级站12接收到的HXP SDU数据nl、n时,同样地通过U-plane向移动目的地基站Ilb转发序列号HXP SDU数据及其序列号。 Thereafter, when the data forwarding nl HXP SDU received from the upper station 12, n, in the same manner forwarding HXP SDU sequence number and data sequence number to the target base station Ilb by U-plane. 在移动目的地基站Ilb中,由于接收到通过U-plane通知的序列号n_5、n_3、n_l、n,由此能够识别出所转发来的数据的序列号。 Ilb the target base station, since the received notification through the U-plane sequence number n_5, n_3, n_l, n, it is possible to identify the sequence number of the forwarded data.

[0195] 图18是将rocp PDU的序列号SN附随在相应的HXP SDU数据中(在带内)并通过U-Plane进行通知,同时移动源基站Ila将未能确认到由移动站正常接收的HXP SDU数据的序列号作为下一个SN通过控制平面(C-plane)进行通知的例子。 [0195] FIG. 18 is a rocp PDU sequence number SN corresponding accompanying HXP SDU data (in-band) and notified by U-Plane, while moving the source base station Ila not confirmed received by the mobile station to the normal HXP SDU sequence number data as the next example SN notified by a control plane (C-plane). 在图19的切换顺序图中,将通过该C-plane进行的序列号(下一个SN)通知表示为“SN交接”。 In the switching sequence of FIG. 19, the sequence number will be performed by the C-plane (Next SN) for the notification indicates "SN handover." SN交接可以与移动源基站Ila向移动目的地基站Ilb进行HO请求同时地进行。 SN handover HO request may be performed simultaneously to the movement destination base station and the mobile source base station Ilb Ila.

[0196] 在图18的状况中,移动源基站Ila首先通过U-plane转发序列号n-5和最初的PDCP SDU数据。 [0196] In the condition of FIG. 18, the source base station forwarding Ila first sequence number n-5 and the first PDCP SDU data via the U-plane. 接着,通过U-plane转发序列号n_3和下一个TOCP SDU数据。 Then, the transfer sequence number and the next n_3 TOCP SDU data via U-plane. 此外,移动源基站Ila同时仅将未能确认到由移动站正常接收的rocp SDU的序列号n-5作为下一个SN通过C-plane通知给移动目的地基站Ilb (SN交接)。 Further, the source base station while only Ila rocp SDU unable to be confirmed by the mobile station normally receives the sequence number n-5 as a next SN by C-plane Ilb notifies the target base station (handover SN). 之后,移动源基站Ila在转发从上级站12接收到的rocp SDU数据η-1、η时,同样地经由U-plane向移动目的地Ilb转发PDCP SDU数据及其序列号。 Thereafter, the source base station forwards the data Ila in rocp SDU received from the upper station 12 to the η-1, when [eta], in the same manner forward PDCP SDU data and the sequence number to the movement destination Ilb via U-plane. 移动目的地基站Ilb接收通过C-plane通知的序列号n_5和通过U-plane通知的序列号n_5、n_3、n_l、n,但是由于通过U-plane通知的序列号比通过C-plane通知的序列号大,因此基于该通过U-plane通知的序列号对此后的HXP SDU数据附加序列号,并传输到移动站。 Ilb by the target base station receives the sequence number notified n_5 C-plane and by sequence number notified n_5 U-plane, n_3, n_l, n, but since the ratio notified by the C-plane sequence number notified by the U-plane a large number, so that based on this sequence number by the U-plane data notified HXP SDU sequence numbers, and transmitted to the mobile station. 即,移动目的地基站Ilb忽略通过C-plane通知的序列号η-5 ο That is, the target base station Ilb ignored SEQ ID NO η-5 ο C-plane notified by

[0197] 图20是完全不存在要转发的rocp SDU数据的情况的例子。 [0197] FIG. 20 is a case to be forwarded rocp SDU data is completely absent example.

[0198] 作为下一个SN,移动源基站Ila经由C-plane向移动目的地基站Ilb通知未能确认到由移动站正常接收的序列号n+1。 [0198] As a next SN, the source base station via the C-plane Ilb Ila notifies the target base station could not be confirmed by the mobile station normally receives the sequence number n + 1. 如果在移动源基站Ila未接收到HXP SDU数据的情况下等待时间到时,则移动目的地基站Ilb基于通过C-plane通知的序列号对此后的HXPSDU数据附加序列号,并传输给移动站。 When the case where the waiting time is not received HXP SDU data in a mobile source base station Ila, Ilb the target base station based on the sequence number appended to this data HXPSDU the sequence number notified by the C-plane, and transmits to the mobile station. S卩,移动目的地基站Ilb将从上级站12接收到的分组m的序列号设为n+1而传输给移动站。 S Jie, Ilb from the target base station to the host station 12 receives the packet of the sequence number m is set to n + 1 are transmitted to the mobile station.

[0199] 以上,根据本发明,能够将从上级站向移动目的地基站传输来的分组作为跳跃分组而迅速地传输到移动站,能够消除数据的延迟时间,提高系统整体的吞吐量。 [0199] or more, according to the present invention, a packet from the upper station to the mobile station as the transmission destination of the jump packets to the mobile station quickly, the delay time data can be eliminated, improving overall system throughput. 此外,移动站从重排序控制(顺序控制)的对象中排除跳跃分组,对跳跃分组之外的分组进行顺序控制,按照序列号顺序将分组传递给上位装置。 In addition, the mobile station reordering object control (order control) in the negative jump packets, packets other than jump packets of sequence control, the packet transmitted to the host device in accordance with sequence numbers. 其结果,移动站即使只具有一个顺序控制功能,也能够正确地进行重排序对象分组的顺序控制。 As a result, even if the mobile station has only a sequence control function, it is possible to correctly order the objects of reordering control packet.

[0200] 此外,根据本发明,移动站是参照最后分组识别码来检测转发结束的情况,由此能够立即停止重排序。 [0200] Further, according to the present invention, with reference to the mobile station to detect the last packet identifier to forward end of the case, whereby the reordering can be stopped immediately. 因此,能够消除数据的延迟时间,提高系统整体的吞吐量。 Thus, the delay time data can be eliminated, improving overall system throughput.

Claims (3)

  1. 1.一种移动站,其特征在于, 该移动站具有接收部,该接收部从如下的移动目的地基站进行接收,该移动目的地基站是将从移动源基站接收到的序列号用作从上级站接收到的分组的序列号而附加给该分组的基站,该接收部接收到的是附加了该序列号的分组。 A mobile station, wherein the mobile station has a receiving unit, the receiving unit receives the following from the target base station, the target base station is received from a source base station from the serial number as superordinate station received sequence number of the packet and appended to the packet the base station, received by the receiving unit is attached to the packet sequence number.
  2. 2.一种无线通信系统,其特征在于, 该无线通信系统具有:移动源基站、移动目的地基站以及移动站, 所述移动目的地基站具有控制部和发送部,该控制部将从移动源基站接收到的序列号用作从上级站接收到的分组的序列号而附加给该分组,该发送部将附加了该序列号的分组发送给移动站, 所述移动站具有接收部,该接收部接收从所述移动目的地基站发送的附加了序列号的分组。 A radio communication system, wherein the wireless communication system comprising: a source base station, the target base station and a mobile station, the target base station includes a control unit and a transmission unit, the control unit from the movement source the base station the received sequence number as received from the host station to the packet sequence number and is added to a packet, the transmission portion of the additional packet sequence number to the mobile station, the mobile station has a receiver that receives receiving an additional portion of the packet sequence number transmitted from the target base station.
  3. 3.一种基站,其特征在于, 该基站具有: 控制部,其将从移动源基站接收到的序列号用作移动目的地基站从上级站接收到的分组的序列号而附加给该分组;以及发送部,其将附加了该序列号的分组发送给移动站。 3. A base station, characterized in that the base station comprising: a control unit that moves from a source base station receives the serial number as the serial number received from the movement destination base station to the upper station to the packet and additional packets; and a transmission unit, which is added to the packet sequence number to the mobile station.
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