# US 10,455,482 B2 · Flexible adjustment of uplink and downlink ratio configuration

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- Number: US 10,455,482 B2
- Document ID: US10455482B2
- Status: Granted
- Kind: B2
- Application number: 15/699,684
- Filed: 2017-09-08
- Published: 2018-05-17
- Granted: 2019-10-22
- Earliest claimed: 2011-04-01
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Ping Wang; Jong-Kae Fwu; Huaning Niu
- Web page: https://patentgrep.com/patent/US10455482B2

## CPC

- H04W 48/10: using broadcasted information
- H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]}
- H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection}
- H04L 5/003: {Arrangements for allocating sub-channels of the transmission path}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0082: {at predetermined intervals}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 5/0096: {Indication of changes in allocation}
- H04L 5/1469: {using time-sharing}
- H04L 25/0204: {of multiple channels}
- H04L 25/0226: {sounding signals per se}
- H04L 25/03343: {Arrangements at the transmitter end}
- H04L 43/50: Testing arrangements
- H04L 45/70: {Routing based on monitoring results}
- H04L 65/65: Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 24/00: Supervisory, monitoring or testing arrangements
- H04W 24/02: Arrangements for optimising operational condition
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 48/12: using downlink control channel
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 48/20: Selecting an access point
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 52/0219: {where the power saving management affects multiple terminals}
- H04W 52/146: {Uplink power control}
- H04W 52/18: TPC being performed according to specific parameters
- H04W 56/001: {Synchronization between nodes}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04L 5/0087: {when data requirements change}
- H04L 25/0328: {with interference cancellation circuitry (adaptations for interference cancellation within a sequence estimator H04L25/03305; interference related aspects of direct sequence spread spectrum H04B1/7097; interference related aspects of frequency hopping spread spectrum H04B1/715; see also H04B1/10)}
- H04L 2025/03426: {transmission using multiple-input and multiple-output channels}
- H04L 2025/03802: {Signalling on the reverse channel}
- H04W 28/04: Error control
- H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)}
- H04W 72/00: Local resource management
- H04W 88/02: Terminal devices
- H04W 88/08: Access point devices
- H04W 92/20: between access points
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

An apparatus and method for flexible adjustment of the uplink-downlink ratio configuration for each enhanced node B (eNodeB) within a wireless communications network is disclosed herein. In one embodiment, a given eNodeB is configured to determine a current or subsequent uplink-downlink ratio configuration for a pre-determined time period. The determined current or subsequent uplink-downlink ratio configuration is encoded into a special physical downlink control channel (PDCCH), the special PDCCH included in at least one radio frame according to the pre-determined time period. The radio frame including the special PDCCH is transmitted to user equipment served by the given eNodeB.

## Claims

### Claim 1

An apparatus of an enhanced Node B (eNB), the apparatus comprising:
a memory; and
processing circuitry configured to:
decode an overload indication and a first uplink/downlink (UL/DL) configuration received from a neighboring eNB;
adapt a second UL/DL configuration for at least one user equipment (UE) responsive to the received overload indication and first UL/DL configuration;
encode the adapted second UL/DL configuration in downlink control information (DCI) of a physical downlink control channel (PDCCH);
scramble a cyclic redundancy check (CRC) for the PDCCH with a radio network temporary identifier (RNTI) reserved for signaling UL/DL configurations; and
encode the PDCCH for transmission to the at least one UE,
wherein the memory is configured to store the adapted second UL/DL configuration.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the processing circuitry is further configured to signal, via a radio resource control (RRC) information element (IE), a number of radio frames for which the adapted second UL/DL configuration applies.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the adapted second UL/DL configuration includes respective indicators for UL subframes, DL subframes and at least one special subframe and the processing circuitry is further configured to:
further adapt the adapted second UL/DL configuration to change at least one of the UL subframe indicators and the at least one special subframe indicator of the adapted second UL/DL configuration to a DL subframe indicator in the further adapted second UL/DL configuration;
encode the further adapted second UL/DL configuration in a further DCI of a further PDCCH;
scramble a further CRC of the further PDCCH with the RNTI reserved for signaling the UL/DL configurations; and
encode the further PDCCH for transmission to the at least one UE, wherein the memory is configured to store the further adapted second UL/DL configuration.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein the at least one UE includes a first UE and a second UE and the processing circuitry is configured to encode the PDCCH for transmission to the first UE and to encode the further PDCCH for transmission to the second UE.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the processing circuitry is configured to exchange information relating to a user traffic pattern with the neighboring eNB.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the information relating to the user traffic pattern includes at least one of uplink transmission power, downlink transmission power, or load information.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein the processing circuitry is further configured to signal, via a radio resource control (RRC) information element (IE) an amount of time between successive PDCCH transmissions containing respective adapted UL/DL configurations.

### Claim 8 (depends on 1)

The apparatus of claim 1, wherein the at least one UE includes one UE and wherein the eNB and the one UE are configured as a primary cell and a secondary cell and the processing circuitry is further configured to encode the PDCCH for transmission to the one UE via the primary cell when the primary cell schedules physical uplink shared channel (PUSCH) transmissions from the one UE for the secondary cell.

### Claim 9 (depends on 1)

The apparatus of claim 1, wherein the at least one UE includes one UE and wherein the eNB and the one UE are configured as a primary cell and a secondary cell and the processing circuitry is further configured to cause the eNB to transmit the PDCCH to the one UE via the secondary cell when the secondary cell schedules physical uplink shared channel (PUSCH) transmissions from the one UE to the eNB.

### Claim 10 (depends on 1)

The apparatus of claim 1, wherein the at least one UE includes a plurality of UEs and the processing circuitry is further configured to encode the PDCCH for transmission to the plurality of UEs.

### Claim 11

A non-transitory computer-readable medium including instructions for execution by processing circuitry of an enhanced Node B (eNB), the instructions, when executed by the processing circuitry, cause the processing circuitry to:
decode an overload indication and a first uplink/downlink (UL/DL) configuration received from a neighboring eNB;
adapt a second UL/DL configuration for at least one user equipment (UE) responsive to the received overload indication and the received first UL/DL configuration;
encode the adapted second UL/DL configuration in downlink control information (DCI) of a physical downlink control channel (PDCCH);
scramble a cyclic redundancy check (CRC) for the PDCCH with a radio network temporary identifier (RNTI) reserved for signaling UL/DL configurations; and
encode the PDCCH for transmission to the at least one UE.

### Claim 12 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the instructions further cause the processing circuitry to exchange information relating to a user traffic pattern with the neighboring eNB.

### Claim 13 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the instructions further cause the processing circuitry to exchange information relating to at least one of uplink transmission power, downlink transmission power, or load information with the neighboring eNB.

### Claim 14 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the instructions further cause the processing circuitry to signal, via a radio resource control (RRC) information element (IE), a number of radio frames for which the determined UL/DL configuration applies.

### Claim 15 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the instructions further cause the processing circuitry to signal, via a radio resource control (RRC) information element (IE), an amount of time between successive PDCCH transmissions containing respective UL/DL configurations.

### Claim 16 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the adapted second UL/DL configuration includes respective indicators for UL subframes, DL subframes and at least one special subframe and the instructions further cause the processing circuitry to:
further adapt the second adapted UL/DL configuration to change at least one of the UL subframe indicator and the at least one special subframe indicator of the adapted second UL/DL configuration to a DL subframe indicator in the further adapted second UL/DL configuration;
encode the further UL/DL configuration in further DCI of a further PDCCH;
scramble a further CRC for the further PDCCH with the RNTI reserved for signaling UL/DL configurations; and
encode the further PDCCH for transmission to the at least one UE.

### Claim 17 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the at least one UE includes a first UE and a second UE and the instructions further cause the processing circuitry to encode the PDCCH for transmission to the first UE and to encode the further PDCCH for transmission to the second UE.

### Claim 18 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the at least one UE includes one UE and wherein the eNB and the one UE are configured as a primary cell and a secondary cell and the instructions further cause the processing circuitry to cause the eNB to transmit the PDCCH to the one UE via the primary cell when the primary cell schedules physical uplink shared channel (PUSCH) transmissions for the secondary cell.

### Claim 19 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the at least one UE includes one UE and wherein the eNB and the one UE are configured as a primary cell and a secondary cell and the instructions further cause the processing circuitry to cause the eNB to transmit the PDCCH to the one UE via the secondary cell when the secondary cell schedules physical uplink shared channel (PUSCH) transmissions.

### Claim 20 (depends on 11)

The non-transitory computer-readable medium of claim 11, wherein the at least one UE includes a plurality of UEs and the instructions further cause the processing circuitry to encode the PDCCH for transmission to the plurality of UEs.

### Claim 21

An apparatus of an enhanced Node B (eNB), the apparatus comprising:
a memory; and
processing circuitry configured to:
adapt a second UL/DL configuration for at least one user equipment (UE) responsive to a received overload indication and a first UL/DL configuration;
encode the adapted second UL/DL configuration in downlink control information (DCI) of a physical downlink control channel (PDCCH);
scramble a cyclic redundancy check (CRC) for the PDCCH with a radio network temporary identifier (RNTI) reserved for signaling UL/DL configurations; and
encode the PDCCH for transmission to the at least one UE,
signal, via a radio resource control (RRC) information element (IE), a number of radio frames for which the adapted second UL/DL configuration applies,
wherein the memory is configured to store the adapted second UL/DL configuration.

### Claim 22 (depends on 21)

The apparatus of claim 21, wherein the adapted second UL/DL configuration includes respective indicators for UL subframes, DL subframes and at least one special subframe and the processing circuitry is further configured to:
further adapt the adapted second UL/DL configuration to change at least one of the UL subframe indicators and the at least one special subframe indicator of the adapted second UL/DL configuration to a DL subframe indicator in the further adapted second UL/DL configuration;
encode the further adapted second UL/DL configuration in a further DCI of a further PDCCH;
scramble a further CRC of the further PDCCH with the RNTI reserved for signaling the UL/DL configurations; and
encode the further PDCCH for transmission to the at least one UE, wherein the memory is configured to store the further adapted second UL/DL configuration.