Selecting a coverage enhancement level based on signal strength measurement
First Claim
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1. A method, comprising:
- in a mobile device,receiving from a base station, information indicating support of a plurality of coverage enhancement levels for the mobile device, wherein a coverage enhancement level provides signal strength information and each coverage enhancement level corresponds to a different physical random access channel for the mobile device;
measuring downlink signal strength of the base station;
selecting a coverage enhancement level from the plurality of coverage enhancement levels based on the downlink signal strength measurement of the base station; and
transmitting a preamble signal, to the base station, using a physical random access channel corresponding to the selected coverage enhancement level, wherein the physical random access channel corresponding to the selected coverage enhancement level is an extended physical random access channel overlapping a physical random access channel.
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Abstract
Various communication systems may benefit from identification of and communication of coverage shortfall. For example, certain communication systems that employ machine type communication devices may benefit from having such shortfall communicated from the devices to a base station. For example, a method can include determining an amount of coverage shortfall of a device. The method can also include transmitting an indication of the amount of coverage shortfall.
11 Citations
16 Claims
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1. A method, comprising:
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in a mobile device, receiving from a base station, information indicating support of a plurality of coverage enhancement levels for the mobile device, wherein a coverage enhancement level provides signal strength information and each coverage enhancement level corresponds to a different physical random access channel for the mobile device; measuring downlink signal strength of the base station; selecting a coverage enhancement level from the plurality of coverage enhancement levels based on the downlink signal strength measurement of the base station; and transmitting a preamble signal, to the base station, using a physical random access channel corresponding to the selected coverage enhancement level, wherein the physical random access channel corresponding to the selected coverage enhancement level is an extended physical random access channel overlapping a physical random access channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to in a mobile device, receive from a base station, information indicating support of a plurality of coverage enhancement levels for the mobile device, wherein a coverage enhancement level provides signal strength information and each coverage enhancement level corresponds to a different physical random access channel for the mobile device; measure downlink signal strength of the base station; select a coverage enhancement level from the plurality of coverage enhancement levels based on the downlink signal strength measurement of the base station; and transmit a preamble signal, to the base station, using a physical random access channel corresponding to the selected coverage enhancement level, wherein the physical random access channel corresponding to the selected coverage enhancement level is an extended physical random access channel overlapping a physical random access channel. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer readable medium, encoded with instructions that, when executed in hardware, cause the hardware to perform a process, the process comprising:
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in a mobile device, receiving from a base station, information indicating support of a plurality of coverage enhancement levels for the mobile device, wherein a coverage enhancement level provides signal strength information and each coverage enhancement level corresponds to a different physical random access channel for the mobile device; measuring downlink signal strength of the base station; selecting a coverage enhancement level from the plurality of coverage enhancement levels based on the downlink signal strength measurement of the base station; and transmitting a preamble signal, to the base station, using a physical random access channel corresponding to the selected coverage enhancement level, wherein the physical random access channel corresponding to the selected coverage enhancement level is an extended physical random access channel overlapping a physical random access channel.
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Specification