# US 2017/0289964 A1 · System and method for partitioning resources for joint decoding in the downlink

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- Number: US 2017/0289964 A1
- Document ID: US20170289964A1
- Status: Published application
- Kind: A1
- Application number: 15/182,032
- Filed: 2016-06-14
- Published: 2017-10-05
- Earliest claimed: 2016-04-01
- Assignees: Huawei Technologies Co., Ltd.
- Inventors: YICHENG LIN; USA VILAIPORNSAWAI; MOHAMMADHADI BALIGH
- Web page: https://patentgrep.com/patent/US20170289964A1

## CPC

- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
- H04B 7/0452: Multi-user MIMO systems
- H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information}
- H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)}
- H04L 1/1896: {ARQ related signaling}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04L 5/0078: {Timing of allocation}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 5/0096: {Indication of changes in allocation}
- H04L 27/2601: {Multicarrier modulation systems}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/046: {the resource being in the space domain, e.g. beams}
- H04W 72/0466: {the resource being a scrambling code}
- H04W 72/0473: {the resource being transmission power}
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/542: using measured or perceived quality
- H04L 1/0003: {by switching between different modulation schemes}
- H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)}
- H04L 5/0014: {Three-dimensional division}
- H04L 5/0026: {Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]}
- H04L 5/0057: {Physical resource allocation for CQI}
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- 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)

## Abstract

Systems and methods are disclosed for partitioning resources into resource partitions, and informing user equipments (UEs) of the resource partitions. Knowledge of the resource partitions may assist the UEs in performing joint decoding. In one embodiment, a method performed by a UE includes receiving at least one message from each base station. The at least one message provides information indicating how resources are partitioned by the base station into a respective plurality of resource partitions. The information is used to identify respective resources for each of at least two downlink transmissions. Respective data that was transmitted on each of the at least two downlink transmissions using the respective resources is jointly decoded.

## Claims

### Claim 1

A method performed at a base station, the method comprising:
transmitting at least one message for at least one user equipment (UE), wherein the at least one UE is to jointly decode respective data in each of at least two downlink transmissions, the at least one message providing information indicating how resources are partitioned by the base station into a plurality of resource partitions;
for each resource partition of the plurality of resource partitions: transmitting data for a UE using a plurality of resources of the resource partition.

### Claim 2 (depends on 1)

The method of claim 1, wherein how the resources are partitioned by the base station into the plurality of resource partitions changes over time, the method further comprising:
transmitting at least one subsequent message indicating how subsequent resources are partitioned by the base station into a subsequent respective plurality of resource partitions.

### Claim 3 (depends on 1)

The method of claim 1, wherein how the resources are partitioned by the base station into the plurality of resource partitions does not change over time, and the at least one message is transmitted to a particular UE when the particular UE enters into a coverage area of the base station.

### Claim 4 (depends on 1)

The method of claim 1, wherein a resource partition set including at least one of the resource partitions is coterminous with a resource partition set of another base station.

### Claim 5 (depends on 1)

The method of claim 1, wherein a first tier is used to transmit data using the plurality of resource partitions, the method further comprising:
when using resources in at least one resource partition to transmit data in the first tier, also using the same resources in the at least one resource partition to transmit other data in a second tier.

### Claim 6 (depends on 5)

The method of claim 5, further comprising:
transmitting an indication of how coded bits are mapped to the resources of the resource partitions, wherein the indication of how coded bits are mapped to the resources of the resource partitions comprises an indication of a redundancy version (RV) used for the coded bits for each resource partition.

### Claim 7 (depends on 6)

The method of claim 6, further comprising:
broadcasting an indication of a HARQ retransmission sent on the first tier for a particular UE.

### Claim 8

A base station comprising:
a joint decoding facilitator configured to generate at least one message for at least one user equipment (UE), wherein the at least one UE is to jointly decode respective data in each of at least two downlink transmissions, the at least one message providing information indicating how resources are partitioned by the base station into a plurality of resource partitions;
the base station configured to:
transmit the at least one message; and
for each resource partition of the plurality of resource partitions: transmit data for a UE using a plurality of resources of the resource partition.

### Claim 9 (depends on 8)

The base station of claim 8, wherein how the resources are partitioned by the base station into the plurality of resource partitions changes over time, and the base station is further configured to transmit at least one subsequent message indicating how subsequent resources are partitioned by the base station into a subsequent respective plurality of resource partitions.

### Claim 10 (depends on 8)

The base station of claim 8, wherein how the resources are partitioned by the base station into the plurality of resource partitions does not change over time, and the base station is configured to transmit the at least one message a particular UE when the particular UE enters into a coverage area of the base station.

### Claim 11 (depends on 8)

The base station of claim 8, wherein a resource partition set including at least one of the resource partitions is coterminous with a resource partition set of another base station.

### Claim 12 (depends on 8)

The base station of claim 8, wherein a first tier is used to transmit data using the plurality of resource partitions, and the base station is further configured to:
when using resources in at least one resource partition to transmit data in the first tier, also use the same resources in the at least one resource partition to transmit other data in a second tier.

### Claim 13 (depends on 12)

The base station of claim 12, wherein the base station is further configured to broadcast an indication of a HARQ retransmission sent on the first tier for a particular UE.

### Claim 14

A method performed by a user equipment (UE), the method comprising:
receiving at least one message from each base station of at least one base station, the at least one message from each base station providing information indicating how resources are partitioned by the base station into a respective plurality of resource partitions;
utilizing the information to identify respective resources for each of at least two downlink transmissions;
jointly decoding respective data that was transmitted on each of the at least two downlink transmissions using the respective resources, to obtain jointly decoded data.

### Claim 15 (depends on 14)

The method of claim 14, wherein each of the downlink transmissions is from a respective base station of a plurality of base stations, and the identified respective resources are coterminous.

### Claim 16 (depends on 15)

The method of claim 15, wherein for each base station of the plurality of base stations, the respective resources comprise a respective resource partition set including at least one resource partition of the respective plurality of resource partitions.

### Claim 17 (depends on 15)

The method of claim 15, wherein the respective data from each of the plurality of base stations is transmitted on a first tier, and wherein other data from a particular base station of the plurality of base stations is transmitted on a second tier using the same resources as the respective resources of the particular base station.

### Claim 18 (depends on 17)

The method of claim 17, wherein the at least one message from each base station further indicates how coded bits are mapped by the base station to resources of each resource partition of the respective plurality of resource partitions.

### Claim 19 (depends on 18)

The method of claim 18, wherein the indication of how the coded bits are mapped by the base station comprises an indication of a redundancy version (RV) used for the coded bits, and wherein for each base station, the RV associated with each resource partition of the respective plurality of resource partitions is the same for each resource partition of the respective plurality of resource partitions.

### Claim 20 (depends on 17)

The method of claim 17, further comprising:
receiving from one base station an indication of a HARQ retransmission sent on the first tier for another UE; and
jointly decoding data for the another UE and additional data on the first tier by using the HARQ retransmission sent for the another UE.

### Claim 21

A user equipment (UE) comprising:
at least one antenna configured to receive at least one message from each base station of at least one base station, the at least one message from each base station providing information indicating how resources are partitioned by the base station into a respective plurality of resource partitions;
a joint decoder configured to obtain jointly decoded data by:
utilizing the information to identify respective resources for each of at least two downlink transmissions; and
jointly decoding respective data that was transmitted on each of the at least two downlink transmissions using the respective resources.

### Claim 22 (depends on 21)

The UE of claim 21, configured to receive each of the downlink transmissions from a respective base station of a plurality of base stations, wherein the identified respective resources are coterminous.

### Claim 23 (depends on 22)

The UE of claim 22, wherein for each base station of the plurality of base stations, the respective resources comprise a respective resource partition set including at least one resource partition of the respective plurality of resource partitions.

### Claim 24 (depends on 22)

The UE of claim 22, configured to receive: the respective data from each of the plurality of base stations transmitted on a first tier; and other data from a particular base station of the plurality of base stations transmitted on a second tier using the same resources as the respective resources of the particular base station.

### Claim 25 (depends on 24)

The UE of claim 24, wherein the at least one message from each base station further indicates how coded bits are mapped by the base station to resources of each resource partition of the respective plurality of resource partitions.

### Claim 26 (depends on 24)

The UE of claim 24, wherein the UE is further configured to:
receive from one base station an indication of a HARQ retransmission sent on the first tier for another UE; and
jointly decode data for the another UE and additional data on the first tier by using the HARQ retransmission sent for the another UE.