Source: http://www.google.com/patents/US7986949?dq=6985872
Timestamp: 2016-07-26 15:09:05
Document Index: 148526147

Matched Legal Cases: ['art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'art 16']

Patent US7986949 - Method for performing handover in broadband wireless access system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA method of entering sleep mode in a mobile subscriber station in performing handover from a first base station (BS) to a second BS is disclosed. More specifically, the method includes entering sleep mode in the first base station and transmitting from the first base station sleep mode information in...http://www.google.com/patents/US7986949?utm_source=gb-gplus-sharePatent US7986949 - Method for performing handover in broadband wireless access systemAdvanced Patent SearchPublication numberUS7986949 B2Publication typeGrantApplication numberUS 11/123,403Publication dateJul 26, 2011Filing dateMay 6, 2005Priority dateMay 7, 2004Fee statusPaidAlso published asCA2565196A1, CA2565196C, EP1762109A2, EP1762109B1, US20050288022, WO2005107377A2, WO2005107377A3Publication number11123403, 123403, US 7986949 B2, US 7986949B2, US-B2-7986949, US7986949 B2, US7986949B2InventorsKi Seon Ryu, Yong Won Kwak, Beum Joon Kim, Yong Ho Kim, Ki Hyoung ChoOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (49), Non-Patent Citations (16), Referenced by (15), Classifications (14), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetMethod for performing handover in broadband wireless access system
US 7986949 B2Abstract
4. The method of claim 3, wherein a size of the initial sleep window parameter does not exceed 28-1 frames if an initial sleep window field is set to “1111111.”
12. The mobile subscriber station of claim 11, wherein a size of the initial sleep window parameter does not exceed 28-1 frames if an initial sleep window field is set to “1111111.”
The broadband wireless access system includes three classes or categories of sleep mode based on the features of currently selected traffic. Sleep mode can also be expressed as power saving mode. There are three types of power saving class modes, further defined as power saving class parameters. A power saving class parameter 1 (“Class 1”) includes an initial sleep window, final window base, final window exponent, listening window, and start frame number of sleep window parameters. Moreover, the objective of Class 1 type is to incorporate features such as Best Effort (BE) which includes features from the existing internet traffic or Non-Real-Time Variable Rate (NRT-VR) with varying transmission rate.
A power saving class parameter 2 (“Class 2”) seeks to incorporate a feature of Real-Time Variable Rate (RT-VR) which varies Voice over Internet Protocol (VoIP) or transmission rate. Class 2 includes an initial sleep window, listening window, and start frame number of sleep window parameters.
A power saving class parameter 3 (“Class 3”) includes periodic transmission of a control message to the MSS in sleep mode along with Downlink Channel Description/Uplink Channel Description (DCD/UCD) and a MOB-NBR-ADV messages for receiving information of neighboring BS coverage areas for handover or transmitting data for multicast transmission. Class 3 includes a final window base, final window exponent, and start frame number of sleep window parameters.
If the MOB-SLP-REQ message is constructed as in Table 5, the initial sleep window size having more than 28-1 frames cannot be expressed. In such a case, the MSS may set the initial sleep window field, which shows the size of the initial sleep window, to “1111111” so that the initial sleep window after handover may have a sleep window size of more than 28-1 frames. Preferably, the initial sleep window size is same as the former sleep window size before handover.
set to ‘0000’
to ‘00000’
In order to transmit the initial sleep window information to the BS2, “initial sleep window base” field and “previous sleep count” field should be included in the MOB-SLP-REQ/RSP messages. In addition, the MSS and the BS can use Equation 2 to calculate the initial sleep window size in the BS2. Preferably, the initial sleep window size is same as the former sleep window size before handover.
In order to transmit the initial sleep window information to the BS2, “initial sleep window base” field, “maximum sleep count” field, and “previous sleep count” field should be included in the MOB-SLP-REQ/RSP messages. The MSS and the BS2 can use Equation 2 to calculate the initial sleep window size in the BS2. Preferably, the initial sleep window size is same as the former sleep window size before handover. In addition, the MSS and the BS can use Equation 4 to calculate the final sleep window size.
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