Dynamic link adaptation
AssigneeSprint Spectrum L.P.
InventorsHemanth Pawar, Krishna Sitaram, Chunmei Liu, Pratik Kothari
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Abstract
Link adaptation for an uplink channel is dynamically performed based on changes in uplink resources in the wireless network, the changes based on frame configuration. If the ratio of uplink to downlink subframes in the new frame configuration is smaller, the throughput is increased by increasing a modulation and coding scheme of the uplink channel, and transmit power of wireless devices. If the ratio of uplink to downlink subframes is increased in the new frame configuration, the throughput is decreased, and the wireless device is instructed to transmit using reduced transmit power.
Claims13
A method for performing dynamic link adaptation, comprising:
- determining a change in a wireless air interface deployed by an access node from a first frame configuration to a second frame configuration, wherein the first frame configuration comprises a first ratio of uplink subframes to downlink subframes within a time period, the second frame configuration comprises a second ratio of uplink subframes to downlink subframes within the time period, and the second ratio is different from the first ratio, wherein the second ratio is smaller than the first ratio;
- adjusting a throughput for uplink data transmitted over the wireless air interface based on the change, wherein the uplink data is transmitted from a wireless device in communication with the access node, and wherein adjusting the throughput further comprises increasing a modulation and coding scheme (MCS) and a transmit power of the wireless device incrementally until a threshold error rate is met, wherein the MCS comprises Quadrature Phase Shift Keying (QPSK), 16-bit Quadrature Amplitude Modulation (16QAM), or 16-bit Quadrature Amplitude Modulation (16QAM);
- and
- instructing the wireless device to transmit the data at the adjusted throughput.
A system for performing dynamic link adaptation, the system comprising:
- a processing node;
- and
- a processor coupled to the processing node, the processor for enabling the processing node to perform operations comprising:
- changing a frame configuration of an air interface from a first frame configuration to a second frame configuration, wherein the first frame configuration comprises a higher amount of uplink resources deployed by an access node[[ ]] than the second frame configuration;
- determining that one or more wireless devices in communication with the access node are configured to transmit uplink data at a first throughput;
- and
- instructing the one or more wireless devices to transmit the uplink data at a second throughput that is different from the first throughput,
- wherein instructing the one or more wireless devices to transmit the uplink data at the second throughput comprises increasing a modulation and coding scheme (MCS) and a transmit power of the one or more wireless devices incrementally until a threshold error rate is met, wherein the MCS comprises Quadrature Phase Shift Keying (QPSK), 16-bit Quadrature Amplitude Modulation (16QAM), or 16-bit Quadrature Amplitude Modulation (16QAM).
A processing node for performing dynamic link adaptation in a wireless network, the processing node comprising a processor that is configured to perform operations comprising:
- determining that an air interface deployed by an access node in the wireless network is switched from using a first frame configuration to using a second frame configuration, wherein the second frame configuration comprises fewer uplink resources than the first frame configuration;
- incrementally increasing a modulation and coding scheme (MCS) and a transmit power level of uplink data transmitted from a wireless device communicatively coupled to the access node until a threshold error rate is reached, wherein the MCS comprises Quadrature Phase Shift Keying (QPSK), 16-bit Quadrature Amplitude Modulation (16QAM), or 16-bit Quadrature Amplitude Modulation (16QAM);
- determining that the air interface is switched from using the second frame configuration to using the first frame configuration;
- and
- incrementally decreasing the MCS and the transmit power level of the uplink data until a minimum requirement is met.
Dependencies are inferred from the claim text.