Tejas Networks Limited

Rohith Vijayakumar Hegde

Vinod Kumar

Vishwas Dubey

The invention provides for method, system and node for 'System Information' (SI) message communication in an LTE deployed wireless communication system comprising of mapping at least a System Information Block (SIB) message into a System Information (SI) message in which SIB messages of same periodicity are mapped to a single SI message. The method further comprising segmenting dynamically the SI message exceeding predefined threshold value of SI bits known a priori that can be transmitted in any one subframe and transmitting the segmented SI messages in the corresponding SI-window wherein, the transmitted segment is indicated as part of previously transmitted segment via one bit indication taken out from the maximum number of bits that can be transmitted in a subframe and wherein if the indication bit is set to '1' then the segment is part of previous frame that had non-zero indication bit and if indication bit is &#x2018;0&#x2019; then the segment is the last segment of the System Information message. The method further decodes the segment by de-scrambling SI-RNTI; buffering the received segments based on indication bit; and assembling the received segments to form a single SI message, upon receiving the last segment indicated by the indication bit.

System information message communication by dynamic segmenting of SI messages in a wireless communication system

The embodiments herein provide a method and system for preventing collisions in a contention based random access preambles in a communication network. The method comprises of dividing the contention based preambles into a plurality of sub-groups, categorizing a plurality of users into a plurality of sub-groups, scheduling the users within a preamble subgroup in one or more random access channel opportunities and transmitting information on the sub-groups of the preamble and the random access channel opportunities to one or more user equipments. The users within a sub-group are provided access to the set of contention based preambles dispersed in time thereby reducing the number of user equipments colliding on a single random access preamble channel.

Method and system for preventing collisions in contention based networks

The embodiments herein provide a method and system for acquiring modified system information messages in user equipment. The method comprises notifying a modification in system information to user equipment for acquiring the modified system information. The notification comprises adding an SI-Modified flag to a scheduling information element in a system information block type-1, storing the system information, in a network, acquiring and comparing a modified system information with the stored system information, identifying system information modification and transmitting the updated system information to user equipment. The user equipment receives the system information modification notification from the network; decodes the scheduling Info List in the SIB1; processes the system information message in the scheduling Info List; identities the modified system information messages, determines SI window information for the modified system information, acquires the modified system information and updates the stored system information.

Method and system for system information acquisition optimization

The various embodiments of the present invention provide a method and system for notifying, a system information modification in at least one of a MIB/SIB1. The method comprises of transmitting a system information in a first modification period by an eNodeB, verifying the system information at eNodeB to check if the system information is to be modified in a modification period succeeding the first modification period, checking at eNodeB if only the system information corresponding to the at least one of the MIB or the SIB1 is modified, fetching the modified system information without initiating a paging procedure if only the MIB/SIB1 is modified and transmitting the modified system information in a succeeding modification period to the system information transmission module. The UE acquires the MIB/SIB1 at a start of each modification period.

Method and system for notifying a system information modification

The embodiments herein provide a method of acquiring a plurality of system information messages in a radio communication network. The method comprises the steps of overlapping a plurality of system information windows and acquiring the plurality of system information messages for which the system information window overlaps in the user equipment. The method of overlapping the system information windows comprises of transmitting system information scheduling configuration containing scheduling information list, calculating start sub-frame and start radio frame of the system information window for the system information messages from the scheduling information, determining occurrence of system information window overlap of the system information messages and acquiring a plurality of system information messages in the overlapped system information windows. The system information acquisition is performed until the plurality of system information messages in the overlapped system information widow is acquired.

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Bengaluru, India

Rohith Vijayakumar Hegde