Cell reselection and handover with multimedia broadcast/multicast service

A wireless transmit/receive unit (WTRU) comprising a receiver, processor and a transmitter, wherein:

• the receiver is configured to receive, from a serving cell of an evolved Node-B (eNodeB), cell information associated with target cells of eNodeBs that neighbor the serving cell;
• the processor is configured to:
• evaluate cell reselection criteria including preference given to multimedia broadcast multicast services (MBMS) frequencies the WTRU is currently and/or interested in receiving via a MBMS single frequency network (MBSFN);
• and
• determine a neighboring target cell to reselect to based, at least in part, on the preference given to MBMS frequencies the WTRU is currently and/or interested in receiving;
• the receiver is configured to receive and read master information block (MIB) and system information messages of the neighboring target cell;
• the transmitter is the transmitter is configured to transmit, to the neighboring target cell eNodeB, a random access channel (RACH) preamble or RACH message;
• and
• the receiver is configured to:
• receive a RACH response from the neighboring target cell;
• and
• receive, from the neighboring target cell, MBMS including the MBMS previously being received from the serving cell.

A method of providing wireless communication services, the method comprising:

• receiving neighbor cell information and capability information for a multimedia broadcast multicast services (MBMS) single frequency network (MBSFN);
• transmitting, to a wireless transmit/receive unit (WTRU), cell information associated with target cells evolved Node-Bs (eNodeBs) that neighbor a serving cell of an eNodeB, the cell information including multimedia broadcast multicast services (MBMS) frequencies associated with the target cells so as to allow the WTRU to determine a neighboring target cell to reselect to;
• receiving, at a given target cell, a random access channel (RACH) preamble or RACH message;
• transmitting, to the WTRU, a RACH response from the given target cell;
• and
• transmitting, from the given target cell, MBMS including the MBMS previously being received from the serving cell.

A system for providing wireless communication services, wherein:

• the system comprises a serving cell of an evolved Node-B (eNodeB) and one or more target cells of eNodeBs;
• the serving cell eNodeB comprises:
• a receiver configured to receive cell information associated with the target cells for a multimedia broadcast multicast services (MBMS) single frequency network (MBSFN);
• and
• a transmitter configured to transmit, to a wireless transmit/receive unit (WTRU), the received cell information, the cell information including multimedia broadcast multicast services (MBMS) frequencies associated with the target cells so as to allow the WTRU to determine a neighboring target cell to reselect to;
• each of the neighboring target cell eNodeBs comprises:
• a receiver configured to receive, from the WTRU, a random access channel (RACH) preamble or RACH message;
• and
• a transmitter configured to (i) transmit, to the WTRU, a RACH response, and (ii) transmit MBMS including the MBMS previously being received from the serving cell.

A method of providing wireless communication services, the method comprising:

• detecting a plurality of target cells of evolved Node-Bs (eNodeBs) that neighbor a serving cell of an eNodeB;
• evaluating, at a wireless transmit and/or receive unit (WTRU), cell reselection criteria including preference given to multimedia broadcast multicast services (MBMS) frequencies the WTRU is currently and/or interested in receiving via a MBMS single frequency network (MBSFN);
• determining a neighboring target cell to reselect to based, at least in part, on the preference given to MBMS frequencies the WTRU is currently and/or interested in receiving;
• receiving and reading master information block (MIB) and system information messages of the neighboring target cell;
• transmitting to the neighboring target cell, a random access channel (RACH) preamble or RACH message;
• receiving a RACH response from the neighboring target cell;
• and
• receiving, from the neighboring target cell, MBMS including the MBMS previously being received from the serving cell eNodeB.

A wireless transmit/receive unit (WTRU) comprising:

• a receiver configured to detect a plurality of target cells of evolved Node-Bs (eNodeBs) that neighbor a serving cell of an eNodeB;
• a processor configured to:
• evaluate cell reselection criteria including preference given to multimedia broadcast multicast services (MBMS) frequencies the WTRU is currently and/or interested in receiving via a MBMS single frequency network (MBSFN), and
• determine a neighboring target cell to reselect to based, at least in part, on the preference given to MBMS frequencies the WTRU is currently and/or interested in receiving;
• the receiver further configured to receive master information block (MIB) and system information messages of the neighboring target cell;
• the processor being further configured to read MIB messages of the neighboring target cell;
• the transmitter further configured to transmit, to the neighboring target cell, a random access channel (RACH) preamble or RACH message;
• and
• the receiver further configured to:
• receive a RACH response from the neighboring target cell;
• and
• receive, from the neighboring target cell, MBMS including the MBMS previously being received from the serving cell.

A target cell of an evolved Node-B (eNodeB) for providing wireless communication services, the target-cell eNodeB comprising:

• a receiver configured to receive, from a serving cell of an eNodeB, a signal including the identity of a wireless transmit/receive unit (WTRU) and required services information;
• a processor configured to determine whether the target cell has the required services;
• and
• a transmitter configured to transmit master information block (MIB) and system information messages, and if when the target cell does not have the required services, the transmitter is further configured to transmit, prior to selection or reselection of the target cell by the WTRU, a first message requesting that the target cell be joined to a multicast distribution tree for providing the required services.

A method of providing service continuity for a wireless transmit and/or receive unit (WTRU), the method comprising:

• transmitting, to a serving cell of an evolved Node-B (eNodeB), measurement reports associated with target cells of eNodeBs that neighbor the serving cell;
• transmitting, to the serving cell, a radio resource control (RRC) message including an indication of multimedia broadcast multicast services (MBMS) frequencies the WTRU is currently and/or interested in receiving via a MBMS single frequency network (MBSFN);
• receiving, from the serving cell, a handover command to handover to a neighboring target cell, the neighboring target cell being selected based, at least in part, on the indication of MBMS the WTRU is currently and/or interested in receiving;
• transmitting, to the given target cell, a random access channel (RACH) preamble or RACH message;
• receiving a RACH response from the given target cell;
• and
• receiving, from the given target cell, MBMS including the MBMS previously being received from the serving cell.

A wireless transmit and/or receive unit (WTRU) adapted for service continuity, the WTRU comprising a transmitter and receiver, wherein:

• the transmitter is configured to:
• transmit, to a serving cell of an evolved Node-B (eNodeB), measurement reports associated with target cells of eNodeBs that neighbor the serving cell;
• and
• transmit, to the serving cell, a radio resource control (RRC) message including an indication of multimedia broadcast multicast services (MBMS) frequencies the WTRU is currently and/or interested in receiving via a MBMS single frequency network (MBSFN);
• the receiver is configured to receive, from the serving cell, a handover command to handover to a neighboring target cell, the neighboring target cell being selected based, at least in part, on the indication of MBMS the WTRU is currently and/or interested in receiving;
• the transmitter is configured to transmit, to the given target cell, a random access channel (RACH) preamble or RACH message;
• the receiver is configured to:
• receive a RACH response from the given target cell;
• and
• receive, from the given target cell, MBMS including the MBMS previously being received from the serving cell.