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    • 21. 发明授权
    • 스큐최소화방법및장치
    • KR100419584B1
    • 2004-05-20
    • KR1019980705653
    • 1997-01-17
    • 텔레폰악티에볼라겟 엘엠 에릭슨(펍)
    • 린드스트롬벵트몰한스-크리스터스테이저오드
    • H04B1/74H04L1/22
    • H04L1/02
    • At a signal transmission rate of 1 Gb/s, the "bit time" is 1 ns. This corresponds to a bit length in an optical fibre of 0.2 m. In view of the fact that skew shall not exceed one-tenth of a bit length, this means that length differences between different conductors in a transmission line may not exceed 2 cm. With the intention of minimizing the skew that would thus otherwise occur in a transmission line, the transmission line (1) and its conductors (2) have been joined to form a ribbon cable or flat cable where the length difference (5) between different conductors (2) in the transmission line does not exceed 2 cm. By providing transmission lines, such as rolled-up flat ribbon cables for instance, which have been previously cut to precise and appropriate lengths, such as lengths of 10, 20, 30 m for instance, with a largest length deviation between different conductors of +/-1 cm, skew can be minimized when using the cables. By conductor is primarily meant an optical fiber, although other conductors such as coaxial conductors or twin wire conductors are conceivable. Since the three fibres are seated together along the major part of their lengths, they can be readily laid in an installation, which is an advantage in many types of installations, and the cable parts can be easily drawn apart and laid individually. With a guaranteed greatest length deviation of +/-1 cm of each fibre, skew can be controlled and more reliable signal transmission made possible with the aid of a majority decision.
    • 在1Gb / s的信号传输速率下,“比特时间” 是1纳秒。 这对应于光纤中0.2微米的位长。 鉴于歪斜不得超过一位长度的十分之一,这意味着传输线中不同导体之间的长度差异不得超过2厘米。 为了最大限度地减少因此会在传输线中发生的歪斜,传输线(1)及其导体(2)已经连接在一起形成带状电缆或扁平电缆,其中不同导体之间的长度差(5) (2)在传输线上不超过2厘米。 通过提供传输线,例如先前已被切割成精确和合适长度的例如卷起的扁平带状电缆,例如长度为10,20,30米,其中不同导体之间的最大长度偏差为+ / -1厘米,使用电缆时可以将偏斜减至最小。 导体主要是指光纤,尽管其他导体如同轴导体或双导线也是可以想到的。 由于三根光纤沿其长度的主要部分放置在一起,因此它们可以容易地铺设在设备中,这在许多类型的设备中是有利的,并且电缆部件可以容易地分开并单独放置。 在每根光纤+/- 1厘米的最大长度偏差保证下,通过多数决定,可以控制偏斜并实现更可靠的信号传输。
    • 24. 发明授权
    • 출력버퍼회로
    • KR100406246B1
    • 2004-04-03
    • KR1019980705490
    • 1996-12-23
    • 텔레폰악티에볼라겟 엘엠 에릭슨(펍)
    • 헤드버그맛드
    • H03K19/00
    • H03K19/017581H03K19/0008
    • An output buffer switching circuit for producing digital output signals comprises a buffer amplifier section (12) for driving a load, a low-impedance transmission line (9) and a power supply section (11) for delivering power to the buffer amplifier section (12). The power supply section (11) comprises a pair of input connections (1, 2) for connection to a voltage source and a pair of output connections (3, 4) connected to the amplifier section (12), reactance devices for temporary energy storage and switching devices adapted to provide a charge phase in which energy from the voltage source is stored in the reactance devices and a discharge phase in which at least some of the energy stored in the reactance devices is discharged to the output connections (3, 4).
    • 用于产生数字输出信号的输出缓冲器切换电路包括用于驱动负载的缓冲放大器部分(12),用于向缓冲放大器部分(12)输送功率的低阻抗传输线(9)和电源部分(11) )。 电源部分(11)包括用于连接到电压源的一对输入连接(1,2)和连接到放大器部分(12)的一对输出连接(3,4),用于临时储能的电抗装置 以及开关装置,其适于提供其中来自电压源的能量被存储在电抗装置中的充电阶段和其中存储在电抗装置中的至少一些能量被放电到输出连接(3,4)的放电阶段, 。
    • 25. 发明授权
    • 예약슬롯형알로하타입의프로토콜에서ARQ를위한임시프레임식별
    • KR100414510B1
    • 2004-02-18
    • KR1019970707325
    • 1996-04-10
    • 텔레폰악티에볼라겟 엘엠 에릭슨(펍)
    • 투리나,델리보
    • H04W74/08
    • H04L1/18H04L1/0083H04L1/1614H04L2012/565H04L2012/5652H04W28/26H04W74/0833
    • Automatic repeat request (ARQ) functionality in a cellular mobile packet data communication system using a reservation slotted-ALOHA protocol is provided by assigning a temporary frame identity (TFI) to each data frame transmitted to or from a mobile station. The assigned TFI is unique among concurrent frame transfer sequences in a cell, and may be assigned based on information in a data frame sent to the mobile station or based on information in a channel reservation message that precedes the data frame sent to the mobile station. The TFI may also be assigned based on information in a channel reservation message that precedes a data frame sent from the mobile station, and the TFI assigned is unique among concurrent frame transfer sequences in a cell. The TFI is included in every block belonging to a particular frame, a block being the unit of data on which ARQ is based. A partial data frame to be retransmitted in case of a transmission error contains only the blocks determined by the ARQ protocol type (e.g., selective or Go-back-N) used, whereby a primary block need not be added to identify the mobile station. Blocks belonging to frames destined for different mobile stations can be multiplexed on the downlink based on the TFI. The mobile station may include, in its random access request, an indication that a TFI is already assigned.
    • 通过为发往或来自移动台的每个数据帧分配临时帧标识(TFI)来提供使用预留时隙ALOHA协议的蜂窝移动分组数据通信系统中的自动重复请求(ARQ)功能。 所分配的TFI在小区中的并发帧转移序列中是唯一的,并且可以基于发送到移动台的数据帧中的信息或基于发送到移动台的数据帧之前的信道预留消息中的信息来分配TFI。 TFI也可以基于在从移动台发送的数据帧之前的信道预留消息中的信息来分配,并且所分配的TFI在小区中的并发帧传送序列中是唯一的。 TFI包含在属于特定帧的每个块中,块是ARQ所基于的数据单元。 在传输错误的情况下要重传的部分数据帧只包含由所使用的ARQ协议类型(例如,选择性或回退N)确定的块,由此不需要添加主块来识别移动台。 基于TFI,属于指定给不同移动台的帧的块可以在下行链路上被复用。 移动台可以在其随机接入请求中包括TFI已被分配的指示。
    • 29. 发明授权
    • 전기통신네트워크에서의가입자서비스
    • KR100384655B1
    • 2003-08-14
    • KR1019970703695
    • 1995-11-29
    • 텔레폰악티에볼라겟 엘엠 에릭슨(펍)
    • 수아레즈하세르루시아데루이다그마폰스요세바이니오메키한누버크햄마크리스티나
    • H04W40/04H04W4/00
    • H04W4/16H04W8/02
    • PCT No. PCT/SE95/01430 Sec. 371 Date May 30, 1997 Sec. 102(e) Date May 30, 1997 PCT Filed Nov. 29, 1995 PCT Pub. No. WO96/17488 PCT Pub. Date Jun. 6, 1996The invention relates to a subscriber service implemented in a telecommunications network (301). The subscriber service is used by a called B-subscriber (MS1), wherein the B-subscriber is able to control the call connection sequence by means of the subscriber service in the event of a call request from a calling A-subscriber (A1). Two separate connections are set-up when the call request is sent from the A-subscriber to the B-subscriber. If the B-subscriber accepts the call, the connections are interconnected in a service node (303). When the B-subscriber chooses to utilize the subscriber service, the subscriber number of the A-subscriber is stored in a memory (304) and the A-subscriber is informed that the B-subscriber will call back later, whereafter the call request is terminated and the two separate connections are released. The B-subscriber is then able to call the A-subscriber with the aid of the subscriber service, while using the A-number stored in the memory (304).
    • PCT No.PCT / SE95 / 01430 Sec。 371日期1997年5月30日 102(e)日期1997年5月30日PCT申请日1995年11月29日PCT公开。 WO 96/17488 PCT Pub。 日期1996年6月6日本发明涉及在电信网络(301)中实现的用户服务。 用户业务由被叫B用户(MS1)使用,其中B用户能够在来自主叫A用户(A1)的呼叫请求的情况下通过用户业务来控制呼叫连接顺序, 。 当呼叫请求从A用户发送到B用户时,建立两个独立的连接。 如果B用户接受呼叫,则连接在服务节点中互连(303)。 当B用户选择使用用户业务时,A用户的用户号码被存储在存储器(304)中,并且A用户被告知B用户稍后将回叫,此后该呼叫请求是 终止并且两个单独的连接被释放。 然后B用户能够借助用户服务呼叫A用户,同时使用存储在存储器(304)中的A号码。
    • 30. 发明授权
    • 적응이중필터에코제거방법
    • KR100382003B1
    • 2003-08-02
    • KR1019980702747
    • 1996-10-16
    • 텔레폰악티에볼라겟 엘엠 에릭슨(펍)
    • 칼센존니에릭슨앤더스
    • H04B3/23
    • H04B3/237
    • In a dual filter echo cancellation method, a new quality measure provides the basis for a new filter selection and transfer method. The quality measure represents the performance of a filter in the adaptive echo canceller. According to the method, a correlation measure between an echo containing signal and an echo estimation signal produced by the filter is estimated. A power measure of a residual signal, formed by the difference between the echo estimation signal and the echo containing signal, is estimated. The quality measure is calculated by dividing the estimated correlation measure by the estimated power measure. An adaptive filter and a programmable filter are used in the echo cancellation and the quality measures for both are calculated and compared. The best of the two filters, as determined by the quality measure, is used for modeling the echo path, and its filter coefficients are copied to the other filter.
    • 在双滤波器回声消除方法中,新的质量度量为新的滤波器选择和传输方法提供了基础。 质量测量表示自适应回声消除器中滤波器的性能。 根据该方法,估计包含回声的信号和由滤波器产生的回声估计信号之间的相关度量。 估计由回声估计信号和含回声信号之间的差异形成的残余信号的功率测量值。 质量度量通过将估计的相关度量除以估计的度量来计算。 自适应滤波器和可编程滤波器用于回声消除,并计算和比较两者的质量度量。 由质量测量确定的两个滤波器中最好的一个用于建模回波路径,其滤波器系数被复制到另一个滤波器。