Method for transmission of MBMS control information in a radio access network
First Claim
1. A method in a radio network node for transmission of multimedia broadcast and multicast service (MBMS) control information, in connection with a MBMS service, in a radio access network comprising a radio base station serving a cell wherein variable transmission bandwidth is employed and the cell has a defined maximum transmission bandwidth, said defined maximum transmission bandwidth comprising a full bandwidth, and a defined minimum bandwidth portion of the full bandwidth, the method comprising:
- a) dynamically activating transmission of MBMS control information based on an amount and portion of a cell bandwidth that is used for a MBMS transmission;
b) modifying content of the MBMS control information based on the amount and the portion of the cell bandwidth that is used for the MBMS transmission; and
the method further comprising;
determining the bandwidth requirement for the MBMS transmission;
positioning the MBMS transmission in an available bandwidth;
determining if more or less than one minimum bandwidth portion is used for the MBMS service; and
if one minimum bandwidth portion or less is used for the MBMS service, the MBMS control information is sent in, and only in, the minimum bandwidth portion used for the MBMS service, and if more than one minimum bandwidth portion is used for the MBMS service, the MBMS control information is sent in more bandwidth portions than the minimum bandwidth portion carrying a major part of the MBMS service.
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Accused Products
Abstract
The present invention relates to multimedia broadcast and multicast services, MBMS, in a cell wherein variable transmission bandwidth is employed. In particular the invention relates to transmission of MBMS control information relating to broadcast and multicast services. According to the method and arrangement of the invention the manner in which the transmission of MBMS control information is performed and/or the content of the MBMS control information is determined based on the amount and the portion of the cell bandwidth that is used for MBMS transmission.
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Citations
20 Claims
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1. A method in a radio network node for transmission of multimedia broadcast and multicast service (MBMS) control information, in connection with a MBMS service, in a radio access network comprising a radio base station serving a cell wherein variable transmission bandwidth is employed and the cell has a defined maximum transmission bandwidth, said defined maximum transmission bandwidth comprising a full bandwidth, and a defined minimum bandwidth portion of the full bandwidth, the method comprising:
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a) dynamically activating transmission of MBMS control information based on an amount and portion of a cell bandwidth that is used for a MBMS transmission; b) modifying content of the MBMS control information based on the amount and the portion of the cell bandwidth that is used for the MBMS transmission; and the method further comprising; determining the bandwidth requirement for the MBMS transmission; positioning the MBMS transmission in an available bandwidth; determining if more or less than one minimum bandwidth portion is used for the MBMS service; and if one minimum bandwidth portion or less is used for the MBMS service, the MBMS control information is sent in, and only in, the minimum bandwidth portion used for the MBMS service, and if more than one minimum bandwidth portion is used for the MBMS service, the MBMS control information is sent in more bandwidth portions than the minimum bandwidth portion carrying a major part of the MBMS service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A radio network node adapted for performing multimedia broadcast and multicast service (MBMS) in a cell wherein variable transmission bandwidth is employed and the cell has a defined maximum transmission bandwidth, hereinafter referred to as the full bandwidth, and a defined minimum bandwidth portion of the full bandwidth, the multimedia broadcast and multicast service comprising transmission of MBMS control information, the radio network node comprising:
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a radio communication module adapted for communication with user equipment; an MBMS module for providing a MBMS service in the cell that the radio network node serves; a MBMS control information module for handling the MSMS control information associated with the MBMS service and dynamically activating the MBMS control information based on bandwidth and position information of a MBMS transmission; a MBMS bandwidth determining module in connection with the MBMS control information module, for determining a bandwidth needed for the MBMS transmission and the capabilities of the user equipment which are to receive the MBMS transmission and for positioning the MBMS transmission in an available bandwidth and for providing the MBMS control information module with a required bandwidth and position information; and the MBMS control information module is further for determining if more or less than one minimum bandwidth portion is used for the MBMS service, and if one minimum bandwidth portion or less is used for the MBMS service, arranging the MBMS control information to be sent in the minimum bandwidth portion used for the MBMS service, and if more than one minimum bandwidth portion is used for the MBMS service, arranging the MBMS control information to be sent in both minimum bandwidth portions. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification