Handover signaling in a wireless network
First Claim
Patent Images
1. A method comprising:
- transmitting, by a first base station, to a second base station and in response to the first base station making a handover decision for a wireless device, a first message comprising a parameter indicating whether the wireless device supports an enhanced physical downlink control channel (ePDCCH);
receiving, from the second base station, a second message comprising configuration parameters of one or more carriers for the wireless device, the configuration parameters comprising one or more parameters indicating;
a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and
a starting orthogonal frequency division multiplexing (OFDM) symbol of the first ePDCCH in the subset of subframes; and
transmitting a third message to the wireless device, the third message comprising the one or more parameters.
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Abstract
A serving base station transmits to a target base station a first message comprising a parameter indicating whether a wireless device supports an enhanced physical downlink control channel (ePDCCH). The serving base station receives from the target base station a second message comprising parameters indicating: a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and a starting OFDM symbol of the first ePDCCH in the subset of subframes. The serving base station transmits a third message to the wireless device comprising the configuration information of the first ePDCCH.
181 Citations
20 Claims
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1. A method comprising:
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transmitting, by a first base station, to a second base station and in response to the first base station making a handover decision for a wireless device, a first message comprising a parameter indicating whether the wireless device supports an enhanced physical downlink control channel (ePDCCH); receiving, from the second base station, a second message comprising configuration parameters of one or more carriers for the wireless device, the configuration parameters comprising one or more parameters indicating; a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and a starting orthogonal frequency division multiplexing (OFDM) symbol of the first ePDCCH in the subset of subframes; and transmitting a third message to the wireless device, the third message comprising the one or more parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A first base station comprising:
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one or more communication interfaces; one or more processors; and memory storing instructions that, when executed, cause the first base station to; transmit, to a second base station and in response to the first base station making a handover decision for a wireless device, a first message comprising a parameter indicating whether the wireless device supports an enhanced physical downlink control channel (ePDCCH); receive, from the second base station, a second message comprising configuration parameters of one or more carriers for the wireless device, the second message comprising one or more parameters indicating; a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and a starting orthogonal frequency division multiplexing (OFDM) symbol of the first ePDCCH in the subset of subframes; and iii) transmit a third message to the wireless device, the third message comprising the one or more parameters. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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transmitting, by a first base station to a second base station and in response to serving first base station making a handover decision for a wireless device, a first message comprising a parameter indicating whether the wireless device supports an enhanced physical downlink control channel (ePDCCH); transmitting, by the second base station to the first base station, a second message comprising configuration parameters of one or more carriers for the wireless device, the second message comprising one or more parameters indicating; a configuration of a subset of subframes in which first radio resources of a first ePDCCH are configured; and a starting orthogonal frequency division multiplexing (OFDM) symbol of the first ePDCCH in the subset of subframes; and transmitting, by the first base station, a third message to the wireless device, the third message comprising the one or more parameters. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification