公开(公告)号：US06507568B2

公开(公告)日：2003-01-14

申请号：US08918996

申请日：1997-08-27

Applicant: Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

Inventor： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

IPC: H04Q700

CPC classification number: H04B7/022 ,  H04B1/7115

Abstract: A mobile communications system employs extended channel assignment messaging during the call setup portion of a mobile call. As part of the call setup process, a mobile station sends an access request message to a primary base station that includes a list of alternate base stations. As call setup continues, the mobile station employs diversity reception in monitoring the paging channel of three base stations, each selected as a function of the strength of the signal-to-noise ratios of their respective pilot tones.

Abstract translation: 移动通信系统在移动呼叫的呼叫建立部分期间采用扩展信道分配消息。 作为呼叫建立过程的一部分，移动台向包括备用基站列表的主基站发送接入请求消息。 随着呼叫建立的继续，移动台在监视三个基站的寻呼信道时采用分集接收，每个基站作为它们各自的导频音的信噪比的强度的函数来选择。

公开(公告)号：US06434367B1

公开(公告)日：2002-08-13

申请号：US09330888

申请日：1999-06-11

Applicant: Sarath Kumar ,  Quinn Li ,  Xiao C. Wu

Inventor： Sarath Kumar ,  Quinn Li ,  Xiao C. Wu

IPC: H04B100

CPC classification number: H04W52/143 ,  H04W52/146 ,  H04W52/40 ,  H04W52/50 ,  H04W52/54

Abstract: In a wireless communications system, a base station transmits power control signals (e.g., the power control bits of a power control sub-channel) to a mobile using a forward-link channel that is decoupled from all other signals transmitted from that base station to that mobile. For example, the decoupled forward-link channel may be a common power control channel. The mobile then uses the power control signals received in the decoupled forward-link channel to control its power level for transmitting one or more reverse-link channels to the base station. The ability of base stations to use decoupled forward-link channels in order to transmit their power control signals to a mobile enables a mobile to operate with different active sets for the forward and reverse links. This enables forward-link data traffic to be implemented using a simplex mode, even when the mobile is operating in soft handoff in the reverse link. This in turn greatly reduces the reactivation time involved in transitioning a mobile from the suspended state to the active state, which is particularly desirable for bursty (i.e., intermittent) packet data flow, as opposed to continuous circuit-oriented voice messaging.

Abstract translation: 在无线通信系统中，基站将功率控制信号（例如，功率控制子信道的功率控制位）发送到移动站，使用前向链路信道，该前向链路信道与从该基站发送的所有其他信号分离到 那个手机。 例如，去耦合的前向链路信道可以是公共功率控制信道。 然后，移动台使用在解耦的前向链路信道中接收的功率控制信号来控制其功率电平，以将一个或多个反向链路信道发送到基站。 基站使用解耦前向链路信道以便将其功率控制信号发送到移动台的能力使得移动台能够利用用于前向链路和反向链路的不同的活动集进行操作。 这使得即使当移动台在反向链路中的软切换中操作时，也可以使用单工模式来实现前向链路数据业务。 这又大大减少了将移动站从暂停状态转换到活动状态所涉及的重新激活时间，这对于突发（即间歇性）分组数据流而言是特别需要的，而不是连续的面向电路的语音消息传递。

公开(公告)号：US6097954A

公开(公告)日：2000-08-01

申请号：US920779

申请日：1997-08-29

Applicant: Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

Inventor： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

IPC: H04W36/18 ,  H09K1/00

CPC classification number: H04W36/18

Abstract: The present invention increases the success rate of soft handoffs by enhancing the ability of a mobile-telephone to receive a handoff direction message that identifies the traffic channel being assigned to enable a candidate base station to communicate with the mobile-telephone. Specifically, the aforementioned ability of the mobile-telephone is enhanced by using the candidate base station to transmit the handoff direction message on a communication channel belonging to the candidate base station and being listened to by the mobile-telephone. In situations where signals transmitted from active set base stations have a low signal-to-noise ratio at the mobile-telephone, signals transmitted from the candidate base station may have a higher signal-to-noise ratio at the mobile-telephone. In these situations, the transmission of the HD messages from the candidate base station increases the likelihood that a copy of the handoff direction message will be successfully received by the mobile-telephone, thereby enhancing the success rate of soft handoffs.

Abstract translation: 本发明通过增强移动电话接收切换方向消息的能力来增加软切换的成功率，该切换方向消息标识被分配的业务信道，以使候选基站能够与移动电话进行通信。 具体地，通过使用候选基站在属于候选基站的通信信道上发送切换方向消息并由移动电话收听来提高移动电话的上述能力。 在从有源设置基站发送的信号在移动电话处具有低信噪比的情况下，从候选基站发送的信号可能在移动电话处具有较高的信噪比。 在这些情况下，来自候选基站的HD消息的传输增加了移动电话成功地接收到切换方向消息的副本的可能性，从而提高了软切换的成功率。

公开(公告)号：US1136791A

公开(公告)日：1915-04-20

申请号：US1914821488

申请日：1914-02-27

Applicant: GHOSH SARATH KUMAR

Inventor： GHOSH SARATH KUMAR

CPC classification number: B61L3/10