# US 2014/0153528 A1 · Method and device for sending and receiving acknowledgement

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- Number: US 2014/0153528 A1
- Document ID: US20140153528A1
- Status: Published application
- Kind: A1
- Application number: 14/177,515
- Filed: 2014-02-11
- Published: 2014-06-05
- Earliest claimed: 2011-08-15
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Xiaobo Chen; Lei Guan
- Web page: https://patentgrep.com/patent/US20140153528A1

## CPC

- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 1/1607: Details of the supervisory signal
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)}
- H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)}
- H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method for sending an acknowledgement includes: sending first subframe ratio information and second subframe ratio information to a UE; reserving a first PHICH resource set in a first acknowledgement subframe set; reserving a second PHICH resource set in an acknowledgement subframe, in which the first PHICH resource set does not exist, of a second acknowledgement subframe set; receiving uplink data sent by the UE; determining an acknowledgement subframe for the uplink data; and sending an acknowledgement to the UE by using a PHICH resource in the first PHICH resource set if the first PHICH resource set exists in the acknowledgement subframe, or sending an acknowledgement to the UE by using a PHICH resource in the second PHICH resource set if the first PHICH resource set does not exist in the acknowledgement subframe. PHICH resource overhead of a system is lowered and data transmission for the user equipment is ensured.

## Claims

### Claim 1

A method for sending an acknowledgement, comprising:
sending, by a network-side device, first subframe ratio information and second subframe ratio information to a user equipment, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
determining, by the network-side device, a first acknowledgement subframe set according to a first timing relation set for the first subframe ratio information, and reserving a first physical hybrid automatic repeat request indicator channel PHICH resource set in an acknowledgement subframe of the first acknowledgement subframe set;
determining, by the network-side device, a second acknowledgement subframe set according to a second timing relation set for the second subframe ratio information, and reserving a second PHICH resource set in an acknowledgement subframe, in which the first PHICH resource set does not exist, of the second acknowledgement subframe set;
receiving, by the network-side device, uplink data sent by the user equipment according to the second subframe ratio information;
determining, by the network-side device, an acknowledgement subframe for the uplink data according to the second timing relation and a subframe for receiving the uplink data; and
sending, by the network-side device by using a PHICH resource in the first PHICH resource set, an acknowledgement to the user equipment if the first PHICH resource set exists in the determined acknowledgement subframe for the uplink data, and sending, by the network-side device by using a PHICH resource in the second PHICH resource set, an acknowledgement to the user equipment if the first PHICH resource set does not exist in the acknowledgement subframe.

### Claim 2 (depends on 1)

The method according to claim 1, wherein:
the first subframe ratio information corresponds to a first serving cell that the user equipment accesses, and the second subframe ratio information corresponds to a second serving cell that the user equipment accesses; and the uplink data is received in the second serving cell by the network-side device; and the acknowledgement is sent in the first serving cell by the network-side device to the user equipment; or the first subframe ratio information and the second subframe ratio information correspond to a same serving cell that the user equipment accesses, wherein: neither the first subframe ratio information nor the second subframe ratio information comprises flexible subframe information; or the first subframe ratio information does not comprise flexible subframe information, and the second subframe ratio information comprises flexible subframe information.

### Claim 3 (depends on 1)

The method according to claim 1, after the sending, by a network-side device, first subframe ratio information and second subframe ratio information to a user equipment, further comprising:
sending, by the network-side device, signaling that carries an index of a CCE in which a PHICH resource in the second PHICH resource set is located and a PHICH resource group number to the user equipment, so that the user equipment determines a location of a PHICH resource group in the second PHICH resource set in the acknowledgement subframe according to the CCE index and the PHICH resource group number, wherein the signaling is radio resource control RRC signaling and/or medium access control MAC signaling.

### Claim 4 (depends on 3)

The method according to claim 3, before the receiving, by the network-side device, uplink data sent by the user equipment according to the second subframe ratio information, further comprising:
sending, by the network-side device, a scheduling command to the user equipment, wherein the scheduling command comprises an orthogonal sequence index in a PHICH resource group in the second PHICH resource set, so that the user equipment determines a location of a PHICH resource in the PHICH resource group according to the orthogonal sequence index.

### Claim 5 (depends on 4)

The method according to claim 4, before the sending, by the network-side device by using a PHICH resource in the second PHICH resource set, an acknowledgement to the user equipment, further comprising:
determining, by the network-side device according to the index of the CCE in which the PHICH resource in the second PHICH resource set is located, the PHICH resource group number, and the orthogonal sequence index, a PHICH resource, in the second PHICH resource set in the acknowledgement subframe, for sending the acknowledgement.

### Claim 6

A method for receiving an acknowledgement, comprising:
receiving, by a user equipment, first subframe ratio information and second subframe ratio information that are sent by a network-side device, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
sending, by the user equipment, uplink data to the network-side device according to the second subframe ratio information;
determining, by the user equipment, an acknowledgement subframe for the uplink data according to a second timing relation set for the second subframe ratio information and a subframe for sending the uplink data; and
if the acknowledgement subframe is a subframe in which a first physical hybrid automatic repeat request indicator channel PHICH resource set exists, receiving, by the user equipment by using a PHICH resource in the first PHICH resource set, an acknowledgement sent by the network-side device; if the acknowledgement subframe is a subframe in which the first PHICH resource set does not exist, receiving, by the user equipment by using a PHICH resource in a reserved second PHICH resource set, an acknowledgement sent by the network-side device, wherein the subframe in which the first PHICH resource set exists is determined by the user equipment according to a first timing relation set for the first subframe ratio.

### Claim 7 (depends on 6)

The method according to claim 6, wherein:
the first subframe ratio information corresponds to a first serving cell that the user equipment accesses, and the second subframe ratio information corresponds to a second serving cell that the user equipment accesses; and the uplink data is sent in the second serving cell by the user equipment to the network-side device; and the acknowledgement is received in the first serving cell by the user equipment; or
the first subframe ratio information and the second subframe ratio information correspond to a same serving cell that the user equipment accesses, wherein: neither the first subframe ratio information nor the second subframe ratio information comprises flexible subframe information; or the first subframe ratio information does not comprise flexible subframe information, and the second subframe ratio information comprises flexible subframe information.

### Claim 8 (depends on 6)

The method according to claim 6, after the receiving, by a user equipment, first subframe ratio information and second subframe ratio information that are sent by a network-side device, further comprising:
receiving, by the user equipment, signaling sent by the network-side device and carries an index of a CCE in which a PHICH resource in the second PHICH resource set is located and a PHICH resource group number, wherein the signaling is radio resource control RRC signaling and/or medium access control MAC signaling; and
determining, by the user equipment, a location of a PHICH resource group in the second PHICH resource set in the acknowledgement subframe according to the CCE index and the PHICH resource group number.

### Claim 9 (depends on 8)

The method according to claim 8, before the sending, by the user equipment, uplink data to the network-side device according to the second subframe ratio information, further comprising:
receiving, by the user equipment, a scheduling command sent by the network-side device, wherein the scheduling command comprises an orthogonal sequence index in a PHICH resource group in the second PHICH resource set; and
determining, by the user equipment, a location of a PHICH resource in the PHICH resource group according to the orthogonal sequence index.

### Claim 10

A network-side device, comprising:
a sender, configured to send first subframe ratio information and second subframe ratio information to a user equipment, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
a processor, configured to determine a first acknowledgement subframe set according to a first timing relation set for the first subframe ratio information sent by the sender and reserve a first physical hybrid automatic repeat request indicator channel PHICH resource set in an acknowledgement subframe of the first acknowledgement subframe set, or determine a second acknowledgement subframe set according to a second timing relation set for the second subframe ratio information sent by the sender and reserve a second PHICH resource set in an acknowledgement subframe, in which the first PHICH resource set does not exist, of the second acknowledgement subframe set; and
a receiver, configured to receive uplink data sent by the user equipment according to the second subframe ratio information sent by the sender; wherein:
the processor is further configured to determine, according to the second timing relation and a subframe for the uplink data received by the receiver, an acknowledgement subframe for the uplink data received by the receiver; and
the sender is further configured to, if the first PHICH resource set exists in the acknowledgement subframe determined by the processor, send an acknowledgement to the user equipment by using a PHICH resource in the first PHICH resource set reserved by the processor; if the first PHICH resource set does not exist in the acknowledgement subframe determined by the processor, send an acknowledgement to the user equipment by using a PHICH resource in the second PHICH resource set reserved by the processor.

### Claim 11 (depends on 10)

The network-side device according to claim 10, wherein:
the first subframe ratio information sent by the sender to the user equipment corresponds to a first serving cell that the user equipment accesses, and the second subframe ratio information sent by the sender to the user equipment corresponds to a second serving cell that the user equipment accesses; the receiver is specifically configured to receive the uplink data in the second serving cell; and the sender is specifically configured to send, in the first serving cell, the acknowledgement to the user equipment; or
the first subframe ratio information and the second subframe ratio information that are sent by the sender to the user equipment correspond to a same serving cell that the user equipment accesses, wherein: neither the first subframe ratio information nor the second subframe ratio information sent by the sender to the user equipment comprises flexible subframe information; or the first subframe ratio information sent by the sender to the user equipment does not comprise flexible subframe information, and the second subframe ratio information comprises flexible subframe information.

### Claim 12 (depends on 11)

The network-side device according to claim 11, wherein the sender is further configured to send signaling that carries an index of a CCE in which a PHICH resource in the second PHICH resource set is located and a PHICH resource group number to the user equipment, so that the user equipment determines a location of a PHICH resource group in the second PHICH resource set in the acknowledgement subframe according to the CCE index and the PHICH resource group number, wherein the signaling is radio resource control RRC signaling and/or medium access control MAC signaling.

### Claim 13 (depends on 12)

The network-side device according to claim 12, wherein the sender is further configured to send a scheduling command to the user equipment, wherein the scheduling command comprises an orthogonal sequence index in a PHICH resource group in the second PHICH resource set, so that the user equipment determines a location of a PHICH resource in the PHICH resource group according to the orthogonal sequence index.

### Claim 14 (depends on 13)

The network-side device according to claim 13, wherein the processor is further configured to determine, according to the index of the CCE in which the PHICH resource in the second PHICH resource set is located, the PHICH resource group number, and the orthogonal sequence index, a PHICH resource, in the second PHICH resource set in the acknowledgement subframe, for sending the acknowledgement.

### Claim 15

A user equipment, comprising:
a receiver, configured to receive first subframe ratio information and second subframe ratio information that are sent by a network-side device, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
a sender, configured to send uplink data to the network-side device according to the second subframe ratio information received by the receiver; and
a processor, configured to determine an acknowledgement subframe for the uplink data according to a second timing relation set for the second subframe ratio information received by the receiver and a subframe for sending the uplink data; wherein:
the receiver is further configured to, if the acknowledgement subframe determined by the processor is a subframe in which a first physical hybrid automatic repeat request indicator channel PHICH resource set exists, receive, by using a PHICH resource in the first PHICH resource set, an acknowledgement sent by the network-side device; if the acknowledgement subframe determined by the processor is a subframe in which the first PHICH resource set does not exist, receive, by using a PHICH resource in a reserved second PHICH resource set, an acknowledgement sent by the network-side device, wherein the subframe in which the first PHICH resource set exists is determined by the processor according to a first timing relation set for the first subframe ratio.

### Claim 16 (depends on 15)

The user equipment according to claim 15, wherein:
the first subframe ratio information received by the receiver corresponds to a first serving cell that the user equipment accesses, and the second subframe ratio information received by the receiver corresponds to a second serving cell that the user equipment accesses; the sender is specifically configured to send, in the second serving cell, the uplink data to the network-side device; and the receiver is specifically configured to receive, in the first serving cell, the acknowledgement sent by the network-side device; or
the first subframe ratio information and the second subframe ratio information that are received by the receiver correspond to a same serving cell that the user equipment accesses, wherein:
neither the first subframe ratio information nor the second subframe ratio information received by the receiver comprises flexible subframe information; or the first subframe ratio information received by the receiver does not comprise flexible subframe information, and the second subframe ratio information received by the receiver comprises flexible subframe information.

### Claim 17 (depends on 15)

The user equipment according to claim 15, wherein the receiver is further configured to receive signaling sent by the network-side device and carries an index of a CCE in which a PHICH resource in the second PHICH resource set is located and a PHICH resource group number, wherein the signaling is radio resource control RRC signaling and/or medium access control MAC signaling; and
the processor is further configured to determine a location of a PHICH resource group in the second PHICH resource set in the acknowledgement subframe according to the CCE index and the PHICH resource group number.

### Claim 18 (depends on 17)

The user equipment according to claim 17, wherein the receiver is further configured to receive a scheduling command sent by the network-side device, wherein the scheduling command comprises an orthogonal sequence index in a PHICH resource group in the second PHICH resource set; and
the processor is further configured to determine a location of a PHICH resource in the PHICH resource group according to the orthogonal sequence index.