CN1192513C - Method for controlling downward special physical channel power under compressed mode - Google Patents

Method for controlling downward special physical channel power under compressed mode Download PDF

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CN1192513C
CN1192513C CNB011402830A CN01140283A CN1192513C CN 1192513 C CN1192513 C CN 1192513C CN B011402830 A CNB011402830 A CN B011402830A CN 01140283 A CN01140283 A CN 01140283A CN 1192513 C CN1192513 C CN 1192513C
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transmission
channel
power control
downlink
uplink
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CN1426172A (en
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陈磊
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华为技术有限公司
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Abstract

本发明公开了一种压缩模式下对下行专用物理信道功率控制的方法,该方法关键在于:当上行专用物理信道采用压缩模式时,在每个传输间隔后第一个时隙的导频比特发送之前,发送发射功率控制比特;基站在收到上行专用物理信道发来的导频比特及导频比特之前的发射功率控制比特后,立即对下行专用物理信道的信道功率进行调整。 The present invention discloses a mode of compressing the downlink dedicated physical channel power control method, the method comprising the key: When the uplink DPCH compressed mode, after each transmission interval of a pilot bit transmission frequency slot before transmitting the transmission power control bit; base station before receipt of an uplink dedicated physical channel is sent to the pilot bit and pilot bit transmit power control bits immediately adjust the downlink dedicated physical channel, the channel power. 采用该方法使得基站能在间隔时隙后尽快恢复对发射功率的控制,从而减少实际SIR值接近目标SIR值所需花费的时间,进而提高信号的传输质量。 Using this method enables the base station can be restored as soon as possible after an interval of time slot control transmit power, thereby reducing the actual value close to the target SIR SIR value required to spend time, thus improving signal transmission quality.

Description

一种压缩模式下对下行专用物理信道功率控制的方法 Compression mode the downlink dedicated physical channel power control method of

技术领域 FIELD

本发明涉及信道功率控制技术,尤指一种在压缩模式下通过改变上行专用物理信道(DPCH)的时隙结构,实现对下行DPCH信道功率进行控制的方法。 The present invention relates to a power control channel, especially a slot structure of an uplink dedicated physical channel (DPCH) is in a compressed mode by changing the implementation method for controlling power of a downlink DPCH channel.

发明背景一般,DPCH信道包括专用物理数据信道(DPDCH)和专用物理控制信道(DPCCH),DPCH信道有两种传输格式:正常模式和压缩模式,以正常模式传输时信道是连续的,而以压缩模式传输时信道要中断一段时间,即存在间隔(gap)时隙,原来在gap时隙位置传输的数据分别与gap前或gap后的原有数据经过压缩后一起传送。 Background of the Invention Usually, the DPCH channel comprises a dedicated physical data channel (DPDCH) and a dedicated physical control channel (DPCCH), DPCH channel based on the transmission format: normal mode and compressed mode channel transmission in normal mode is continuous, and to compress when the interrupt mode transmission channel for a period of time, i.e. there is a space (gap) time slots, the original data in each transmission gap slot position with the original data before transmission gap or the gap together after compression. 通常,压缩模式下的上行DPCH信道时隙结构如图1所示,其中DPCCH信道的每个时隙包括:导频(pilot)域、传输格式合并指示(TFCI)域、反馈信息(FBI)域以及发射功率控制(TPC)域。 Typically, an uplink DPCH channel slot in the compressed mode configuration shown in Figure 1, wherein each slot of the DPCCH channel comprising: a pilot (Pilot) domain, combined transport format indication (the TFCI) field, a feedback information (FBI) field and a transmission power control (TPC) field. 压缩模式下的下行DPCH信道有两种时隙结构:第一种如图2所示,每个时隙依次包括数据1(Data1)域、TPC域、TFCI域、数据2(Data2)域以及导频(PL,pilot)域,在数据时隙之间存在传输间隔(transmission gap)时隙。 Downlink DPCH compressed mode channel in time slot structure, there are two: the first 2, each slot includes data sequence 1 (Data1) field, the TPC field, the TFCI field, the data 2 (the Data2) field and conducting frequency (PL, pilot) domain, present transmission interval (transmission gap) between the time slot data slot. 第二种如图3所示,该下行DPCH信道的整体时隙结构分布及每个时隙的组成与第一种下行DPCH信道的基本相同,只是在第一个gap时隙中DPCCH信道的TPC域增加了TPC比特,用于控制上行信道中gap后第一个时隙的发射功率。 3 a second, substantially the same composition as the overall downlink DPCH channel timeslot structure and distribution of each slot with the first downlink DPCH channel, only TPC DPCCH channel in the first time slot gap domain increased TPC bit transmit power controlling the first slot of the uplink channel gap.

为了保证数据的传输质量,通常需要通过功率控制来调整下行链路的发射功率。 In order to ensure data transmission quality generally required to adjust the transmit power by the downlink power control. 根据协议规定,下行链路内环功率控制的具体过程是这样的:首先,用户设备(UE)对下行DPCCH中当前时隙内的pilot比特进行信干比(SIR)测量,并将测量结果和事先设定的外环目标SIR值进行比较;然后,UE根据比较的结果产生出控制下行功率的TPC命令,同时决定TPC值,并在随后的一个上行DPCCH信道的时隙中将该TPC命令及TPC值传递给基站;基站NodeB接收到该上行时隙后,根据其中的TPC命令,来调整最近一个时隙DPCH信道的发射功率。 According to the agreement, particularly the downlink inner loop power control procedure is such that: First, the user equipment (UE) on the downlink DPCCH pilot bits in the current time slot in the signal to interference ratio (SIR) measurement, and the measurement result outer loop target SIR set in advance are compared; then, the UE according to the comparison result of the downlink power control TPC commands, while the decision value TPC, and a subsequent uplink time slot in the DPCCH channel and a TPC command TPC values ​​transmitted to the base station; base station NodeB, after receiving the uplink time slot, according to which the TPC command to adjust the transmit power of a latest timeslot of the DPCH. 更进一步地说就是:基站NodeB在接收到上行DPCCH信道发来的TPC命令后,将根据该TPC命令中所传递的TPC值及相关信息,从距离当前时刻最近的还未发送的下行DPCH信道的pilot比特开始对下行发射功率进行调整。 Still further said that: the base station NodeB, after receiving the uplink DPCCH channel sent to the TPC command, according to the TPC value and the information about the TPC command is transmitted, the distance from the current time downlink DPCH channel nearest yet sent pilot bit begins to adjust downlink transmit power. 对于下行DPCH信道功率的调整,不是从一个时隙的开始时刻,即图2所示的data1比特进行的,而是从前一个时隙的pilot比特开始进行的。 For the adjustment of the DPCH downlink power, not from the start time of a time slot, i.e. the bit data1 shown in FIG. 2, but the pilot bits of the previous time slot is started.

在上述内环功率控制过程中,当上行DPCH信道的时隙结构处于压缩模式时,如图1所示,由于传输gap时隙的存在将导致TPC命令无法传递,这时基站NodeB将停止内环功率控制过程,直到有新的上行TPC命令传递给基站NodeB为止。 In the inner-loop power control process, when the time slot structure of an uplink DPCH channel in the compressed mode, as shown in FIG. 1, due to the presence of a transmission gap slots will cause TPC command can not be delivered, then the base station NodeB inner stop power control process until new uplink TPC command is transmitted to the far base station NodeB.

配合图4所示,可以更详细地说明TPC无法传递的原因。 As shown in FIG. 4 with, TPC reasons can not be delivered may be described in more detail. 图4为UE天线侧处于压缩模式下的上、下行DPCH信道时隙对应关系图,在图4中,以斜线填充的时隙为数据时隙;空白的时隙为gap时隙;以网格填充的部分为最后一个gap时隙中的pilot比特;所示的A和B区域表示上行信道和下行信道中gap不重叠的区域。 FIG 4 is a UE is on the lower side of the antenna in the compressed mode, the downlink DPCH channel slot correspondence relationship diagram in FIG. 4, the hatched slots are data slots filled; empty slot is the slot gap; to network partially filled cell is a pilot bit of the last slot of the gap; areas a and B shown in FIG uplink channel and a downlink channel do not overlap with gap area.

按照正常情况,即在正常传输模式下,图4所示上行时隙1中的TPC比特用于控制下行时隙3(或下行时隙4,当内环功率控制的延迟为两个时隙时)的功率。 When under normal circumstances, i.e. in the normal transmission mode, the uplink time slot 1 shown in FIG. 4 of the TPC bit for controlling downlink slot 3 (or downlink slot 4, when the inner loop power control delay of two slots ) of power. 而当上行信道和下行信道同时使用压缩模式时,由于下行DPCH信道时隙4中pilot比特的存在,UE可以对该时隙的pilot比特进行SIR测量,并产生出控制基站功率调整的TPC命令,但是由于上行时隙4处于gap,因此UE产生的这个TPC命令无法通过上行信道进行传输,如此,就导致下行时隙6(或下行时隙7)没能进行功率调整。 When the uplink channel and downlink channel use compressed mode, since the downlink DPCH channel slots presence of 4 pilot bits, the UE can perform SIR measurement of the pilot bit slot, and generates the control base station power adjustment TPC command, However, since the uplink slot 4 in the GAP, the UE generates a TPC command that can not be transmitted through the uplink channel, thus, leads to a downlink timeslot 6 (or downlink time slot 7) failed power adjustment. 当上行信道使用压缩模式而下行信道使用非压缩模式时,同样,下行DPCH信道正常产生的TPC命令,由于上行DPCH信道当前时隙为gap时隙而无法传送新的TPC命令给基站。 When the uplink channel using the downlink channel and the compressed mode using a non-compressed mode, the same, a downlink DPCH channel normally generated TPC commands, since the uplink DPCH channel current slot is slot gap can not send a new TPC command to the base station. gap之后恢复期的目的就是:为了尽快减小由于gap期间功率控制中断而造成的实际SIR值和目标SIR值之间的偏差,但是由于上面所述的原因,使得基站直到gap后第3个(或第4个)时隙时才能开始进行功率控制。 After recovery gap purpose is: to reduce the deviation between the actual value and the target SIR value SIR due to power interruption during the gap caused by the control as soon as possible, but due to the reasons stated above, that the base station until the third gap ( before starting the power control or the fourth) slot.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供一种压缩模式下对下行专用物理信道功率控制的方法,使得基站能在gap后尽快恢复对发射功率的控制,从而减少实际SIR值接近目标SIR值所需花费的时间,进而提高信号的传输质量。 In view of this, the main object of the present invention is to provide a method for the compressed mode downlink dedicated physical channel power control, so that the base station can regain control of the transmission power as soon as GAP, thereby reducing the actual value close to the target SIR SIR value it takes time, thereby improving signal transmission quality.

本发明的另一目的在于:当上行信道处于压缩模式,而下行信道处于非压缩模式时,能够进一步优化下行功率控制。 Another object of the present invention is that: when the uplink channel is in compressed mode, the downlink channel in the non-compressed mode, the downlink power control can be further optimized.

为达到上述目的,本发明的技术方案具体是这样实现的:一种压缩模式下对下行专用物理信道功率控制的方法,该方法至少包括以下步骤:当上行专用物理信道采用压缩模式时,在每个传输间隔后第一个时隙的导频比特发送之前,发送发射功率控制比特;基站在收到上行专用物理信道发来的导频比特及导频比特之前的发射功率控制比特后,立即对下行专用物理信道的信道功率进行调整。 To achieve the above object, the technical solution of the present invention is specifically implemented as follows: a compression-mode method for a downlink dedicated physical channel power control, the method comprising at least the steps of: when the uplink DPCH compressed mode, each after a first transmission interval of the guide slot before the bit transmission frequency, transmission power control bits transmission; base station after receiving the uplink dedicated physical channel pilot bits sent and before the pilot bit transmission power control bits, immediately downlink dedicated physical channel channel power adjustment. 其中,所述发射功率控制比特的发射功率根据上行专用物理信道每个传输间隔后第一个时隙的发射功率确定方法来确定。 Wherein said transmission power control bit transmission power of the transmission power of the first slot interval determination method according to the uplink dedicated physical channel for each transmission is determined.

该方法进一步包括:当下行专用物理信道采用压缩模式时,在第一个传输间隔中的发射功率控制域位置上发送发射功率控制比特。 The method further comprising: when downlink dedicated physical channel using the compressed mode, transmission power in a first transmission interval of the transmission power control controls the transmission bit field position.

由上述方案可以看出,本发明的关键在于:在上行DPCCH信道的最后一个gap时隙中增加TPC比特,以提前一个时隙进行下行闭环功率控制,改善链路性能。 As can be seen from the above embodiment, the present invention is critical: TPC bit to increase a gap in the last slot of the uplink DPCCH channel in order to advance a slot for downlink closed loop power control, the link performance.

可见,本发明所提供的压缩模式下对下行专用物理信道功率控制的方法,当上、下行DPCH信道同时使用压缩模式时,在上行DPCCH信道的最后一个gap时隙中增加TPC比特,可使基站在恢复期中提前一个时隙进行下行闭环功率控制,从而加快实际SIR值逼近目标SIR值的过程,改善链路性能,提高信号传输质量。 Be seen, the compressed mode according to the present invention provides a method for a downlink dedicated physical channel power control, when the uplink and downlink DPCH channels simultaneously compressed mode, increasing the TPC bit in the last gap slot of an uplink DPCCH channel, the can base advance a time slot in the downlink closed loop power control in the recovery period, to accelerate the process actual value approaches the target SIR SIR value, improve link performance, improve signal transmission quality.

即使只有上行DPCH信道使用压缩模式时,在上行DPCCH信道的最后一个gap时隙中增加TPC比特,同样由于提前一个时隙进行闭环功率控制,可实现下行功率控制的优化,进一步改善链路性能。 Even when there is only uplink DPCH channel use the compressed mode, increasing the last TPC bit in a time slot gap in the uplink DPCCH channel, a time slot in advance also due to closed loop power control, downlink power control can be optimized to further improve the link performance.

附图说明 BRIEF DESCRIPTION

图1为现有技术中压缩模式下上行DPCH信道时隙结构示意图;图2为现有技术中压缩模式下下行DPCH信道一种时隙结构示意图;图3为现有技术中压缩模式下下行DPCH信道另一种时隙结构示意图;图4为现有技术中上、下行压缩模式对应关系图;图5为本发明中压缩模式下上行DPCH信道时隙结构示意图。 1 is a schematic structure of an uplink DPCH channel slot compressed mode under the prior art; FIG. 2 is a downlink slot structure of the DPCH channel one kind of the prior art schematic compressed mode; FIG. 3 is a prior art under downlink DPCH compressed mode another schematic structure of a channel time slot; Figure 4 is a prior art, FIG downlink compressed mode correspondence relationship; a schematic diagram of an uplink DPCH channel time slot structure of FIG. 5 of the present invention the compressed mode.

具体实施方式 Detailed ways

下面结合附图及具体实施例对本发明再作进一步详细的说明。 Specific embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings and.

当上行DPCH信道使用压缩模式时,要想缩短实际SIR值逼近目标SIR值的过程,想尽快恢复对下行DPCH信道的功率控制,就需要上行DPCCH信道能在gap结束前传送当前下行DPCH信道产生的新TPC命令给基站,那么,如图5所示,在上行DPCCH信道Transmission gap的最后一个gap时隙中增加TPC比特,即可使基站提前一个时隙进行闭环功率控制。 When the uplink DPCH channel use compressed mode, in order to shorten the actual SIR value of the approximation process target SIR value, to restore the power control of the downlink DPCH channel as soon as possible, it is necessary the uplink DPCCH channel can be transmitted current downlink DPCH channel before the end of the gap produced the new TPC command to the base station, then, as shown in FIG. 5, the TPC bit to increase a gap in the last slot of the uplink DPCCH Transmission channel gap, the base station can make in advance a time slot closed loop power control.

本发明对上行DPCCH信道时隙结构的改动,并不会减少gap中实际用于异频测量的有效时间。 Changes to the uplink DPCCH channel slot structure of the present invention, the effective time does not reduce the gap to the actual inter-frequency measurements. 所谓异频测量就是指:当UE准备进行硬切换,即切换到和当前频率不同的其它频率时,要事先对所要切换到的频率进行测量。 The so-called inter-frequency measurement refers to: when the UE is ready to perform a hard handover, i.e., switching to the other frequency different from the current frequency to be switched in advance to the frequency measured. 由于压缩模式的相关参数对上行链路和下行链路都是一致的,因此,当系统在上行链路和下行链路中一起使用压缩模式时,可以得出UE端的上行发射信道和下行接收信道的对应关系如图4所示。 Since the compression mode parameters for the uplink and downlink are the same, therefore, when the system is used together with the compressed mode in the uplink and downlink, the uplink transmission channel can be derived at the UE and the downlink reception channel the correspondence relationship shown in FIG. 在图中可以看出实际有效的频率切换区,即可以用于异频测量的时间段,要小于gap的实际长度。 As can be seen in FIG practical and effective switching frequency region, i.e., the time period may be used for inter-frequency measurement, the gap is less than the actual length. 如果从下行信道看,在第一个gap时隙的大约前半个时隙和最后一个gap时隙的最后几比特处,实际上天线的接收或发送频率仍停留在当前小区。 When viewed from the downstream channel, the last few bits of the first half and the last time slot at about the gap in the first slot of the slot gap, in fact, receiving antenna or the transmission frequency remains in the current cell. 下行信道gap中第一个gap时隙的前半个时隙不进行频率切换的目的是要等上行信道当前时隙的信号发送完毕,由于图4中的A区实际上仍停留在当前小区中,因此可用来发送一些数据,这种情况下,下行DPCH信道就可以采用图3所示的第二种时隙结构,即在第一个gap时隙中DPCCH信道的TPC域增加TPC比特,用这个时间段来传输TPC比特,以控制上行信道中gap后第一个时隙的功率。 Objective downlink channel gap a gap in the first half slot before the slot of the frequency switching is not performed to wait for an uplink channel signal of the current slot has been sent, since the area A in FIG. 4 in fact remains in the current cell, thus it is used to send some data, in this case, on the second downlink channel DPCH slot structure shown in FIG. 3 may be employed, i.e., a gap in the first slot of the DPCCH channel fields TPC TPC bit to increase, with this period of time to transmit the TPC bit to control the power of the first time slot after a gap in the upstream channel. 同样,由于在上行信道最后一个gap时隙的后面几比特处,如图4所示的B区,UE的天线实际上已经切换回了本小区,因此可以在上行信道gap的最后一个时隙,即图4中上行时隙4处加一段TPC比特,这样就可以将根据下行信道时隙4中pilot比特的SIR测量结果所得到的TPC比特在相应的上行时隙中上传,从而多调整一个下行链路时隙的发射功率。 Also, since the gap behind the slot several bits of the last uplink channel, B area shown in FIG. 4, the UE has been switched back to the antenna actually present cell, it can be the last slot of the gap in the uplink channel, i.e., FIG. 4 uplink slot TPC bit adding section 4 so that it can be obtained according to the SIR measurement result of pilot bit downlink TPC bit channel time slot 4 in the corresponding uplink slot uploaded, thereby adjusting a plurality of downlink transmit power link time slots.

本发明可以应用于WCDMA通信系统中的压缩模式功率控制,具体的实施过程如下:当上行信道和下行信道都采用压缩模式时,则上行DPCH信道采用本发明的时隙格式,即:在最后一个gaP时隙中增加TPC比特。 The present invention may be applied to the compressed mode power control WCDMA communication system, the specific implementation process is as follows: when the uplink channel and a downlink channel are compressed mode, the upside of the DPCH using the slot format of the present invention, namely: in the last gaP increase TPC bit slots. 这时UE对下行DPCH信道中最后一个gap时隙中的pilot比特进行SIR测量,并与目标SIR值进行比较,然后将比较结果用上行DPCH信道最后一个gap时隙中增加的TPC比特发送出去,如此,便可提前一个时隙开始内环功率控制,减小由于gap存在对内环功率控制的影响。 In this case the UE a downlink DPCH channel gap slot last bits of pilot SIR measured and compared with the target SIR value, then the comparison result of the last slot gap increase uplink channel DPCH TPC bit sent, so, you can start ahead of a slot inner loop power control, to reduce the influence of the inner loop power control exist gap.

当只有上行信道使用压缩模式,而下行信道采用正常模式时,由于数据传输暂时中断所空出的空白部分长度就是测量时间长度,空白部分越长,可用于测量的时间就越长,那么,额外加入TPC比特将导致测量时间减少。 When there is only uplink channel use compressed mode, the downlink channel in normal mode, since the data transfer is temporarily interrupted vacated blank portion of the length is to measure the length of time, the longer the blank portion, the longer the time available for measurement, then additional Add TPC bits will cause the measurement time is reduced. 因此,根据实际应用情况,如果对内环功率控制的要求大于对有效测量时间长度的要求,则上行DPCH信道也采用本发明的时隙格式。 Thus, depending on the application, if the requirement is greater than the inner loop power control requirements for a valid measurement of the length of time of the uplink DPCH channel also uses the slot format of the present invention.

其中,所增加的TPC比特的发射功率,可根据3GPP TS 25.214协议中规定的上行DPCH信道gap后第一个时隙的发射功率确定方法来确定。 Wherein the TPC bit to increase the transmission power, the transmission power may be determined according to the method of the first slot of the channel after a predetermined gap 3GPP TS 25.214 protocol determined uplink DPCH.

Claims (3)

1.一种压缩模式下对下行专用物理信道功率控制的方法,其特征在于该方法至少包括以下步骤:当上行专用物理信道采用压缩模式时,在每个传输间隔后第一个时隙的导频比特发送之前,发送发射功率控制比特;基站在收到上行专用物理信道发来的导频比特及导频比特之前的发射功率控制比特后,立即对下行专用物理信道的信道功率进行调整。 A compressed mode of the method of the downlink dedicated physical channel power control, characterized in that the method comprises at least the steps of: when the uplink DPCH compressed mode, a first guide slot after each transmission interval before the pilot bit transmission, transmitting transmission power control bit; base station receives an uplink dedicated physical channels sent by the pilot prior to the bit and pilot bit transmit power control bits immediately adjust the downlink dedicated physical channel, the channel power.
2.根据权利要求1所述的方法,其特征在于,该方法进一步包括:当下行专用物理信道采用压缩模式时,在第一个传输间隔中的发射功率控制域位置上发送发射功率控制比特。 2. The method according to claim 1, wherein the method further comprises: when the downlink DPCH compressed mode, transmission power in a first transmission interval of the transmission power control controls the transmission bit field position.
3.根据权利要求1所述的方法,其特征在于,所述发射功率控制比特的发射功率根据上行专用物理信道每个传输间隔后第一个时隙的发射功率确定方法来确定。 3. The method according to claim 1, wherein said transmission power control bit transmission power of the transmission power of a time slot determination method to determine the interval after each transmission according to the uplink dedicated physical channel.
CNB011402830A 2001-12-12 2001-12-12 Method for controlling downward special physical channel power under compressed mode CN1192513C (en)

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CN100413222C (en) * 2003-07-11 2008-08-20 Ut斯达康(中国)有限公司 Method and system for determining target signal interference ratio of down link public channel power control
KR100932486B1 (en) 2004-05-04 2009-12-17 엘지전자 주식회사 Method channelization code allocation in a wireless mobile communication system
UA88026C2 (en) 2004-09-24 2009-09-10 Квелкомм Инкорпорейтед Method and apparatus for data transmission in a system employing differing transmission protocols
CN101383658B (en) 2008-09-24 2012-12-05 中兴通讯股份有限公司 Processing method for downlink physical channel compression schema
CN102045824A (en) * 2009-10-22 2011-05-04 中兴通讯股份有限公司 Method for controlling power of downlink channel of trunking communication system, base station and mobile station
EP2597784A4 (en) 2010-07-20 2017-01-04 ZTE Corporation Method and system for controlling compression mode in macro-diversity state
CN104125627B (en) * 2013-04-23 2019-08-06 中兴通讯股份有限公司 A kind of method and apparatus of downward special physical channel transmitting

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