CN110945932A

CN110945932A - Techniques for utilizing uplink control channel resources

Info

Publication number: CN110945932A
Application number: CN201780093432.3A
Authority: CN
Inventors: 韩祥辉; 夏树强; 梁春丽; 苟伟; 石靖; 张雯
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2020-03-31
Anticipated expiration: 2037-08-11
Also published as: CN110945932B; WO2019028835A1

Abstract

A Physical Uplink Control Channel (PUCCH) can be efficiently managed and utilized by a base station and a mobile station. In an exemplary embodiment, a mobile station receives an allocation of channel resources from a base station. The base station assigns at least one of the allocated channel resources to the mobile station. The mobile station uses the channel resources to transmit messages to the base station.

Description

Techniques for utilizing uplink control channel resources

Technical Field

The present disclosure relates generally to digital wireless communications.

Background

Mobile telecommunications technology is driving the world towards an increasingly interconnected and networked society. Next generation systems and wireless communication technologies will need to support a wider range of use case features and provide a more complex and refined range of access requirements and flexibility than existing wireless networks.

Long Term Evolution (LTE) is a wireless communication standard for mobile devices and data terminals developed by the third generation partnership project (3 GPP). LTE-advanced (LTE-a) is a wireless communication standard that enhances the LTE standard. Fifth generation wireless systems (referred to as 5G) advance the LTE and LTE-a wireless standards and are dedicated to support higher data rates, large numbers of connections, ultra-low latency, high reliability, and other emerging traffic needs.

Disclosure of Invention

The present disclosure relates to methods, systems, and devices for managing Physical Uplink Control Channel (PUCCH) resources.

The exemplary embodiments disclose a wireless communication method for a mobile station. The method includes receiving, by a mobile station, a first indication indicating a first plurality of channel resources allocated for the mobile station, receiving, by the mobile station, a second indication indicating at least one channel resource within the first plurality of channel resources and assigned to the mobile station, and transmitting, by the mobile station, one or more messages using a second plurality of channel resources, the second plurality of channel resources including the at least one channel resource assigned to the mobile station.

In some embodiments, the mobile station is operated to determine the second plurality of channel resources. In some embodiments, the one or more messages are transmitted on one or more physical resource blocks. In some embodiments, operating the mobile station to use the one or more physical resource blocks further comprises dividing a channel resource value of the second plurality of channel resources by the uplink sequence length to obtain a value, and rounding down the value to the nearest integer value.

In some embodiments, receiving the first indication includes receiving a Radio Resource Control (RRC) message that allocates a first plurality of channel resources to the mobile station. In some embodiments, receiving the second indication includes receiving Downlink Control Information (DCI) that assigns at least one of a first plurality of channel resources allocated to the mobile station.

In an exemplary embodiment, at least a subset of the first plurality of channel resources is divided into a plurality of groups, each group comprising at least two channel resources. In some embodiments, the plurality of groups includes a first group and a second group, transmitting the one or more messages includes transmitting any one or more of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message, a first cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of a first channel resource of the second group is greater than a first threshold value for transmitting the Acknowledgement (ACK) message, a second cyclic shift difference between the first cyclic shift value of the first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is less than a second threshold value for transmitting the Negative Acknowledgement (NACK) message, and the first threshold value is greater than or equal to the second threshold value.

In some embodiments, the plurality of groups includes a first group and a second group, and a cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is greater than a threshold. In some embodiments, the plurality of groups includes a first group and a second group, and a cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is less than a threshold.

In some embodiments, the plurality of groups are identified to the mobile station by any one of a Radio Resource Control (RRC) message and Downlink Control Information (DCI). In an exemplary embodiment, the first and second plurality of channel resources are a plurality of physical uplink control channel resources.

In some embodiments, the one or more messages include any one or more of: an Acknowledgement (ACK) message, a Negative Acknowledgement (NACK) message, and a Scheduling Request (SR) message. In some embodiments, the example method also includes determining, by the mobile station, one or more cyclic shift values for transmission of the one or more messages.

In some embodiments, the mobile station transmits a Cyclic Shift (CS) value to represent an Acknowledgement (ACK) message, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

In some embodiments, the mobile station transmits a last cyclic shift value to represent a Negative Acknowledgement (NACK) message, wherein the last cyclic shift value is associated with a last channel resource of the second plurality of channel resources.

In some embodiments, a mobile station transmits one or more Cyclic Shift (CS) values to represent a Scheduling Request (SR) message, wherein the one or more cyclic shift values are not equal to cyclic shift values associated with transmission of Acknowledgement (ACK) messages and Negative Acknowledgement (NACK) messages.

In some embodiments, a mobile station transmits a Cyclic Shift (CS) value to represent any of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of a Scheduling Request (SR) message.

In some embodiments, a mobile station transmits a Cyclic Shift (CS) value to represent a combination of a Scheduling Request (SR) message and any of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

In some embodiments, the mobile station transmits a message by multiplying data from a Negative Acknowledgement (NACK) message by a phase offset factor e^jθThe resulting value, where θ is any one of: cell-specific configuration parameters, group-specific configuration parameters, and mobile station-specific configuration parameters.

In some embodiments, the mobile station transmits a Scheduling Request (SR) message using scheduling request channel resources allocated to the mobile station.

In some embodiments, the mobile station transmits a Cyclic Shift (CS) value to represent a combination of a Scheduling Request (SR) message and an Acknowledgement (ACK) message, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

In some embodiments, the mobile station transmits a combination of a Scheduling Request (SR) message or a Negative Acknowledgement (NACK) message using scheduling request channel resources allocated to the mobile station.

Another exemplary embodiment discloses a wireless communication method performed at a base station. The example method includes transmitting a first indication indicating a first plurality of channel resources allocated for each of a plurality of mobile stations, transmitting a second indication indicating at least one channel resource assigned to each of the plurality of mobile stations, and receiving one or more messages on a second plurality of channel resources from at least one of the plurality of mobile stations.

In some embodiments, the one or more messages include a message indicating an Acknowledgement (ACK), a Negative Acknowledgement (NACK) message, and a Scheduling Request (SR) message.

In some embodiments, the base station receives a Cyclic Shift (CS) value representing an Acknowledgement (ACK) message from the at least one mobile station, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

In some embodiments, the base station receives a last cyclic shift value representing a Negative Acknowledgement (NACK) message from the at least one mobile station, wherein the last cyclic shift value is associated with a last channel resource of the second plurality of channel resources.

In some embodiments, a base station receives one or more Cyclic Shift (CS) values representing a Scheduling Request (SR) message from at least one mobile station, wherein the one or more cyclic shift values are not equal to cyclic shift values associated with transmission of Acknowledgement (ACK) messages and Negative Acknowledgement (NACK) messages.

In some embodiments, a base station receives a Cyclic Shift (CS) value representing any one of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message from at least one mobile station, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of a Scheduling Request (SR) message.

In some embodiments, a base station receives a Cyclic Shift (CS) value representing a combination of a Scheduling Request (SR) message and any one of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message from at least one mobile station, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

In some embodiments, a base station receives data from at least one mobile station by multiplying data from a Negative Acknowledgement (NACK) message by a phase offset factor e^jθThe resulting value, where θ is any one of: cell-specific configuration parameters, group-specific configuration parameters, and mobile station-specific configuration parameters.

In some embodiments, a base station receives a Scheduling Request (SR) message from at least one mobile station on a scheduling request channel resource allocated to the mobile station.

In some embodiments, the base station receives a Cyclic Shift (CS) value representing a combination of a Scheduling Request (SR) message and an Acknowledgement (ACK) message from the at least one mobile station, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

In some embodiments, a base station receives a combination of a Scheduling Request (SR) message or a Negative Acknowledgement (NACK) message on a scheduling request channel resource allocated to at least one mobile station from the at least one mobile station.

In some embodiments, the first plurality of channel resources are allocated using Radio Resource Control (RRC) messages transmitted to a plurality of mobile stations. In some embodiments, the at least one channel resource is within a first plurality of channel resources and is assigned to each of a plurality of mobile stations using downlink control channel information (DCI) transmitted to the plurality of mobile stations.

In some embodiments, at least a subset of the first plurality of channel resources is divided into a plurality of groups, each group comprising at least two channel resources. In some embodiments, the plurality of groups includes a first group and a second group, receiving the one or more messages includes receiving any one or more of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message, a first cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of a first channel resource of the second group is greater than a first threshold value for receiving the Acknowledgement (ACK) message, a second cyclic shift difference between the first cyclic shift value of the first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is less than a second threshold value for receiving the Negative Acknowledgement (NACK) message, and the first threshold value is greater than or equal to the second threshold value.

In some embodiments, the plurality of groups includes a first group and a second group, and a cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is greater than a threshold.

In some embodiments, the plurality of groups includes a first group and a second group, and a cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of the first channel resource of the second group is less than a threshold.

In some embodiments, the base station identifies the plurality of groups to the mobile station by transmitting any one of a Radio Resource Control (RRC) message and Downlink Control Information (DCI). In some embodiments, the first and second plurality of channel resources are a plurality of physical uplink control channel resources. In some embodiments, the plurality of mobile stations is three mobile stations.

In another exemplary aspect, the above-described method is embodied in the form of processor-executable code stored in a computer-readable program medium.

In yet another exemplary aspect, an apparatus configured or operable to perform the above-described method is disclosed.

The above-described and other aspects and their implementations are described in more detail in the accompanying drawings, the description and the claims.

Drawings

Fig. 1 illustrates an exemplary base station and mobile station that manage and utilize PUCCH channel resources.

Fig. 2 illustrates an exemplary flow chart for a mobile station determining channel resources for transmitting one or more messages.

Fig. 3 illustrates an exemplary flow diagram of a base station allocating channel resources for a plurality of mobile stations.

Fig. 4 illustrates an exemplary block diagram of a mobile station utilizing channel resources.

Fig. 5 illustrates an exemplary block diagram of a base station managing channel resources.

Fig. 6 shows an exemplary PUCCH multiplexed with different TTI lengths.

Fig. 7 illustrates an exemplary PUCCH resource mapping.

Fig. 8 shows another exemplary PUCCH resource mapping.

Detailed Description

In some wireless systems, the Transmission Time Interval (TTI) length (e.g., 1ms) is relatively long, and the delay caused by the TTI, while acceptable for some existing applications, will not meet the future requirements for ultra-low delay in wireless communications. One solution in 5G systems or other future wireless networks is to reduce the length of the transmission time for shortened physical channels, such as the Physical Uplink Control Channel (PUCCH). The PUCCH is a wireless channel for transmitting information from the mobile station to the base station. For example, the mobile station may transmit information such as Acknowledgement (ACK), Negative Acknowledgement (NACK), and Scheduling Request (SR) using the PUCCH. The mobile station transmits an ACK/NACK to the base station to inform the base station whether the mobile station has correctly decoded the data transmitted by the base station. A Scheduling Request (SR) is used by a mobile station to request uplink resources to transmit data.

In LTE, LTE-a, and 5G systems, the sequence selection transmission scheme allows transmission of 1 to 2-bit Acknowledgement (ACK) messages or Negative Acknowledgement (NACK) messages on a shortened PUCCH scheme. Thus, the sequence of channel resources is used to carry information. However, carrying information on the sequence of channel resources also consumes more resources. For example, a one-bit transmission requires two channel resources, while a two-bit transmission requires four channel resources. Therefore, there is a need to reduce the use of channel resources and improve system reuse efficiency.

Furthermore, in existing systems, each UE uses only one PUCCH channel resource for PUCCH transmission format on each antenna. In some implementations, the sequence selection scheme requires multiple PUCCH channel resources. In some existing systems, there is no efficient allocation method to manage and utilize multiple PUCCH channel resources. Accordingly, it may be advantageous to redesign PUCCH channel resources for the base station and the mobile station to efficiently manage and utilize the PUCCH channel resources. In some embodiments, a channel resource allocation method is disclosed. In some other embodiments, resource usage for transmitting ACKs, NACKs, and Scheduling Resources (SRs) is reduced.

Fig. 1 illustrates an exemplary base station and mobile station that manage and utilize PUCCH channel resources. The base station (120) transmits channel resources (140a-140c) allocated to a plurality of mobile stations (110a-110 c). The mobile stations (110a-110c) transmit information to the base station (120) using the PUCCH channel resources (130a-130 c). In some embodiments, the base station (120) manages channel resources for three mobile stations (110a-110 c). For PUCCH formats in which 1 to 2 bits of information are transmitted based on sequence selection, each mobile station or User Equipment (UE) acquires a plurality of PUCCH channel resources. The present embodiment provides a plurality of channel resource allocation schemes.

Channelization of channel resources

Configuration example 1

Fig. 1 shows that the base station (120) transmits, for example, four PUCCH channel resources allocated to one of the mobile stations (110a) using upper layer Radio Resource Control (RRC). The mobile station (110a) receives a first indication (140a) indicating a first plurality of channel resources allocated for the mobile station. The base station (120) transmits a first indication to the mobile station (110 a).

The base station (120) assigns or instructs one of the channel resources to the mobile station (110a) through a downlink control channel (DCI). This one channel resource assigned to the mobile station (110a) is called

Where p is the antenna port index. Assignment

Allows the mobile station (110a) to identify a first channel resource assigned to the mobile station. The mobile station (110a) receives a second indication (150a) indicating at least one channel resource assigned to the mobile station (110a) (e.g.,

) Wherein the first plurality of channel resources includes the at least one channel resource.

The mobile station then determines a second plurality of channel resources, wherein the second plurality of channel resources includes at least one channel resource assigned to the mobile station. The mobile station (110a) obtains its value and identifies other remaining channel resources by calculating the following equation

Where the maximum value of i is equal to the number of PUCCH channel resources required by the mobile station minus one. Thus, in some embodiments, i may be the number of second plurality of channel resources minus one. In the examples disclosed above, i is 1,2, 3.

Is the cyclic shift difference between two adjacent PUCCH channel resources.

Can be a semi-statically configured value obtained from an RRC transmitted by the base station (120), or

May be obtained by a DCI dynamic indication transmitted by the base station (120). C is a constant and the default value of C is 1.

The channelization for the PUCCH channel resources may be determined by the following equation:

wherein L is the sequence length, n_sIs the slot index, is the symbol index,

is a constant configured by a high level semi-static configuration, such as RRC.

Is a randomization parameter for inter-cell. Channelization is further based on the obtained channel resources to further obtain frequency domain phase rotation factors for specific Resource Block (RB) locations and sequences needed to transmit information

Cyclic shift

Is the phase of the channel resource. Applying phase rotation in the frequency domain is equivalent to applying cyclic shift in the time domain. Thus, the frequency domain phase rotation value is equal to the cyclic shift value in the time domain.

The following example assumes

And L is 12. Assuming first channel resources dynamically obtained through DCI

Equal to 0, wherein,

and n _PRB0. In configuration example 1, the first plurality of channel resources allocated by the base station are 0,1,2, and 3, and the second plurality of channel resources determined by the mobile station are 0,3,6, and 9. Accordingly, the PUCCH channel resource determined by the mobile station may be different from the PUCCH channel resource allocated by the base station and configured by RRC. Further, n is_PRBBy assigning a channel resource value (e.g.,

) Divided by the sequence length (e.g., L-12). The result of the division is a value rounded down to the nearest integer value. Thus, in configuration example 1, n_PRB＝0。

For

And

frequency domain phase rotation factor of

0,3,6,9 respectively. That is, the resource finally obtained by the mobile station (110a) for transmitting uplink control information will be used for transmitting four sequences having frequency-domain phase rotation factors of 0,3,6, and 9, respectively, in resource block 0, RB # 0.

In another example, wherein

L-12, it is assumed that the channel resource obtained through, for example, DCI is

The mobile station calculates the following values:

n

_PRB0 and

n

_PRB1. For the

And

the frequency domain phase rotation factor is 0, and for

And

the frequency domain phase rotation factor is 6. That is, the resource for transmitting uplink control information acquired by the mobile station (110a) is a sequence using frequency domain twiddle factors 0 and 6 in both RB #0 and RB # 1.

In some embodiments, the calculations disclosed in this document may be used to allow a mobile station to configure two channel resources to send one bit of ACK/NACK information.

Fig. 2 illustrates an exemplary flow chart for a mobile station determining channel resources for transmitting one or more messages. At receive first indication operation 202, the mobile station receives a first indication indicating a first plurality of channel resources allocated for the mobile station. At receive second indication operation 204, the mobile station receives a second indication indicating at least one channel resource assigned to the mobile station. The first plurality of channel resources includes the at least one channel resource. At a transmitting operation 206, the mobile station transmits one or more messages using the second plurality of channel resources. The second plurality of channel resources includes at least one channel resource assigned to the mobile station.

Fig. 3 illustrates an exemplary flow diagram of a base station allocating channel resources for a plurality of mobile stations. At transmit first indication operation 302, the base station transmits a first indication indicating a first plurality of channel resources allocated for each mobile station of a plurality of mobile stations. At transmit second indication operation 304, the base station transmits a second indication indicating at least one channel resource assigned to each mobile station of the plurality of mobile stations. In some embodiments, the first plurality of channel resources includes the at least one channel resource. At receiving operation 306, the base station receives one or more messages on a second plurality of channel resources from the mobile station.

Configuration example 2

In another example, the mobile station (110b) may transmit two bits of ACK/NACK information using, for example, four PUCCH channel resources. The base station (120) configures four channel resource groups to the mobile station (110b) through an upper RRC layer. Each group has four channel resources. The base station (120) indicates to the mobile station (110b) one grouping of the four channel resource groups by two bits in the DCI. Thus, in some embodiments, the first plurality of channel resources comprises four groups of channel resources, and the second plurality of channel resources may be one of the four groups of channel resources. Thus, the second plurality of channel resources may be a subset of the first plurality of channel resources allocated to the mobile station.

After obtaining the four channel resources, the mobile station (110b) may obtain the specific RB location and sequence frequency domain twiddle factor using the exemplary channelization method mentioned in this patent document (e.g., in configuration example 1). The mobile station then transmits one or more messages, such as any one or more of ACK, NACK, and SR, using the channel resources described for configuration example 1.

In some other embodiments, the base station (120) configures four channel resource groups to the mobile station (110b) through an upper layer RRC. Each group has, for example, three channel resources. The base station (120) indicates one of the four groups of channel resources to the mobile station (110b) by two bits in the DCI. Three channel resources in the indicated group may be used for ACK transmission. The base station (120) configures another channel resource to the mobile station (110b) through an upper layer RRC. This channel resource configured by RRC is only used for NACK transmission. Thus, in some embodiments, the configuration methods for ACK transmission and NACK transmission are different. Further, the configuration of the ACK channel resources and the configuration of the NACK channel resources are performed separately.

Configuration example 3

In yet another example, the mobile station (110c) may transmit two bits of ACK/NACK information using, for example, four PUCCH channel resources. The base station (120) configures four channel resource groups to the mobile station (110c) through upper RRC layers (e.g., a first packet, a second packet, a third packet, and a fourth packet). Each of the four groups of channel resources has at least two channel resources. The base station (120) indicates to the mobile station (110c) the group of channel resources within the first packet destined for the mobile station (110c) by the first two bits in the DCI. The base station (120) indicates to the mobile station (110c) the group of channel resources within a second packet destined for the mobile station (110c) by a second two bits in the DCI. The base station (120) indicates to the mobile station (110c) the group of channel resources within a third packet destined for the mobile station (110c) by a third two bits in the DCI. And, the base station (120) indicates to the mobile station (110c) the channel resource group within a fourth packet destined for the mobile station (110c) by a fourth two bits in the DCI. Thus, the first plurality of channel resources is divided into a plurality of groups, each group comprising at least two channel resources. After obtaining these four channel resources, the mobile station (110c) may use the exemplary channelization methods mentioned in this patent document to obtain the specific RB location and sequence frequency domain twiddle factor. Therefore, configuration example 3 is more flexible than configuration example 2.

In another example, the mobile station may transmit one bit of ACK/NACK information using, for example, two PUCCH channel resources. The base station configures four channel resource groups to the mobile station through upper RRC, which are a first packet and a second packet, each having four channel resources. The base station indicates the group of channel resources within the first packet to the mobile station over two bits within the DCI. The base station indicates the group of channel resources in the second packet to the mobile station by the other two bits in the DCI. After obtaining the two channel resources, the mobile station may use the exemplary channelization method mentioned in this patent document to obtain the specific RB location and sequence frequency domain twiddle factor. The mobile station then transmits one or more messages, such as any one or more of an ACK, a NACK, and an SR, using the group of channel resources.

In some embodiments, a cyclic shift difference value X between a first cyclic shift value of a first channel resource of a first group and a second cyclic shift value of a first channel resource of another group is given by the following formula:

X＝min(|α_i-α_j|modL，(12-|α_i-α_j|)modL)

α therein_iIs a first cyclic shift value associated with a first channel resource of a first group, and α_jIs a second cyclic shift value associated with the first channel resource of the second group.

In some embodiments, a cyclic shift difference between a first cyclic shift of a first channel resource of a first group and a second cyclic shift of a first channel resource of another group is greater than a first threshold for transmission of an Acknowledgement (ACK) message. A difference in cyclic shifts between a first cyclic shift of a first channel resource of a first group and a second cyclic shift of a first channel resource of another group is less than a second threshold for transmission of a negative Acknowledgement (ACK) message. The first threshold is greater than or equal to the second threshold.

Accordingly, in some embodiments, the mobile station may transmit an Acknowledgement (ACK) message using a first cyclic shift value of the first channel resource of the first group or a second cyclic shift value of the first channel resource of the second group. The cyclic shift difference between the first cyclic shift value and the second cyclic shift value is greater than a threshold.

In some embodiments, the mobile station may transmit a Negative Acknowledgement (NACK) message using a first cyclic shift value of the first channel resource of the first group or a second cyclic shift value of the first channel resource of the second group. The cyclic shift difference between the first cyclic shift value and the second cyclic shift value is less than a threshold.

In another embodiment, a difference in cyclic shifts between a first cyclic shift of a first channel resource of a first group and a second cyclic shift of a first channel resource of another group is less than a first threshold for transmission of an Acknowledgement (ACK) message. A difference in cyclic shifts between a first cyclic shift of a first channel resource of a first group and a second cyclic shift of a first channel resource of another group is greater than a second threshold for transmission of a negative Acknowledgement (ACK) message. The first threshold is less than or equal to the second threshold.

Transmission of NACK

In an exemplary embodiment, for a PUCCH format in which 1 to two bits of information are transmitted based on sequence selection, a plurality of mobile stations share a resource for transmitting NACK.

NACK transmission example 1

When the mobile station sends a one-bit ACK/NACK message, the mobile station may require, for example, two sequences to characterize. One sequence or cyclic shift represents an ACK and the other sequence or cyclic shift represents a NACK. Table 1 shows sequence resources required for three mobile stations UE1, UE2, and UE3 to transmit one-bit ACK/NACK messages. In this example, the sequences used by UE1, UE2, and UE3 are CS _1, CS _2, and CS _3, respectively. In table 1, the sequence of NACKs is the same for all UEs. Therefore, all UEs use the sequence CS _ N for transmitting NACKs. From the perspective of channel resources, the different channel resources used to characterize ACKs are different, while the channel resources used to characterize NACKs are the same.

The CS is a cyclic shift value that may be determined based on a formula described for an exemplary channelization method. In this example, each UE only needs two channel resources, which belong to the second plurality of channel resources. Thus, CS _1 refers to a cyclic shift value associated with the first channel resource of UE 1. CS _2 refers to a cyclic shift value associated with the first channel resource of UE2, and so on. CS _ N refers to the last cyclic shift value associated with the last channel resource allocated to the mobile device.

TABLE 1 one-bit ACK/NACK transmission for sequence-based selection PUCCH

At the detection end, when the base station receives the ACK or NACK message, the base station processes the message. For example, if the base station detects that the ACK sequence of the mobile station is greater than or equal to a predetermined threshold, the base station determines that the mobile station transmitted an ACK message. The predetermined threshold may be a false alarm value. In another example, if the base station detects that the NACK sequence is greater than or equal to a predetermined threshold and when the ACK sequence is less than or equal to the predetermined threshold, the base station determines that the mobile station transmitted a NACK, otherwise the base station determines that the message is a Discontinuous Transmission (DTX). The base station detecting the ACK or NACK sequence means that the base station obtains a peak associated with a signal received on a predetermined resource using a local ACK or NACK sequence. The channel resources for the UE to transmit the ACK are indicated independently of the channel resources for transmitting the NACK. The channel resource allocation scheme for a certain UE to transmit an ACK is different from the channel resource allocation scheme for transmitting a NACK. The channelization of the channel resources used by the UE to transmit the ACK is different from the channelization of the channel resources used to transmit the NACK.

NACK Transmission example 2

In another example, when the mobile station transmits a two-bit ACK/NACK message, it is represented by "11", "10", "01", and "00" as shown in table 2. Each of these two bits represents an ACK or NACK message for each of the two transport blocks received by the mobile station. The mobile station may be characterized using, for example, four channel resources. Table 2 shows sequence resources required for two mobile stations to transmit two-bit ACK/NACK messages. In this example, the sequences used to characterize the packets containing ACK information are different, but only the sequence of NACK information is the same. Thus, all UEs use the same sequence NN. From the perspective of channel resources, different mobile stations use different channel resources for ACK messages, but different mobile stations use the same channel resources for NACKs.

TABLE 2 two-bit ACK/NACK Transmission on sequence-based selection PUCCH

When transmitting NACK information, the UE multiplies the transmission sequence by a phase offset factor e^jθWhere θ is any of: a cell-specific configuration parameter, a group-specific configuration parameter, or a mobile station-specific configuration parameter. Different users may have different theta parameters.

NACK transmission example 3

In another example, when a partial UE transmits a one-bit ACK/NACK message and a partial UE transmits a two-bit ACK/NACK message, two channel resources are allocated to the UE transmitting the one bit and four channel resources are allocated to the UE transmitting the two bits. Table 3 shows a resource configuration table for two UEs transmitting one-bit and two-bit ACK/NACK messages, respectively. The channel resources used to transmit one bit for transmitting NACK are the same as the channel resources used to transmit two bits for transmitting NACK information only.

TABLE 3 one-bit ACK/NACK transmission for sequence-based selection PUCCH

Transmission of ACK, NACK and SR

In some embodiments, the mobile station transmits an ACK/NACK message and a Scheduling Request (SR) message simultaneously. In such an embodiment, the mobile station transmits the ACK/NACK message using the channel resource of the SR message, thereby achieving efficient reuse of both. Since the ACK/NACK requires multiple channel resources, the SR also requires multiple channel resources. Thus, the exemplary method achieves reduced SR channel resource consumption.

ACK, NACK, and SR Transmission example 1

In one example, the base station allocates four PUCCH channel resources to the mobile station. The mobile station transmits a two-bit ACK/NACK message using the four channel resources without an SR transmission opportunity, as shown in table 4. CS1 through CS4 may be four cyclic shift values associated with four different channel resources. Thus, CS1 through CS4 are four channel resources allocated to the mobile station.

TABLE 4-two bit ACK/NACK transmission in slots without SR transmission opportunity

As shown in table 5, in a slot having an SR transmission opportunity, if only an SR is transmitted, the mobile station uses 2 of four resources, such as the following two channel resources CS3 and CS4, for transmitting the SR, which may characterize two SR types, such as two SR types triggering eMBB or triggering URLLC. When the mobile station transmits only ACK/NACK, these two bits of information may first be combined or bundled into one bit by an AND operation, AND then the two channel resources CS1 AND CS2 may be used to represent or refer to ACK/NACK as discussed in this patent document. If the UE transmits both the ACK and the SR, or transmits both the NACK and the SR, two channel resources, e.g., CS3 and CS4, are transmitted.

TABLE 5 two-bit ACK/NACK transmission in a slot with SR Transmit opportunity

In another example, as shown in table 6, when the mobile station has only an SR to transmit, the mobile station may use a default resource of four resources. For example, the mobile station may use the resources for the bundled NACK + SR (CS4) for transmission.

TABLE 6-two bit ACK/NACK transmission in a slot with SR transmission opportunity

In another example, as shown in table 7, when a mobile station or User Equipment (UE) transmits a one-bit ACK/NACK message with an SR transmission opportunity, three different channel resources are allocated to each mobile station. It is assumed that the three different channel resources correspond to three different sequences. Table 7 shows a resource allocation table for 2 UEs transmitting one-bit ACK/NACK and/or SR. For example, when the UE1 and the UE2 only transmit SRs, the two UEs may use different scheduling request channel resources, e.g., SR _1 and SR _ 2. When two UEs send NACKs, the two UEs may use channel resource CS _ N for transmitting NACKs. Table 7 also shows that when UE1 and UE2 simultaneously transmit NACK and SR, UE1 and UE2 use SR _1 and SR _2, respectively. When UE1 and UE2 simultaneously transmit ACK and SR, UE1 and UE2 use CS _1 and CS _2, respectively. The scheduling request channel resources are allocated to the UE by the base station. The UE may also send the ACK and SR simultaneously using the sequence request channel resources allocated to the UE by the base station.

TABLE 7 Transmission of one-bit ACK/NACK and/or SR

Channel resource sharing

In an exemplary embodiment, the first exemplary embodiment for channelization is combined with the second exemplary embodiment for NACK transmission to solve the resource allocation problem when considering channel resource sharing.

Example 1

In one example, the mobile station may transmit two bits of ACK/NACK information using, for example, four PUCCH channel resources. The base station configures or allocates four channel resources to the UE through an upper RRC. The base station transmits an indication to the UE using, for example, a DCI message to identify one of the channel resources allocated to the UE. The UE deduces two channel resources according to the channel resource identified by the base station to the UE. The three channel resources obtained by the UE may be used by the UE to send information, such as a two-bit ACK message, or a message that includes one bit for ACK and another bit for NACK.

The base station configures or allocates another UE-specific channel resource of the UE through an upper layer semi-statically (e.g., RRC). The allocated channel resources may be used by the UE to transmit information containing only NACK messages, including, for example, when both bits are NACK. In the above example, for the UE, the channel resources used to transmit the packet containing the ACK are indicated independently of the channel resources used to transmit the NACK. Also, for a certain UE, the channel resource allocation scheme for transmitting a packet containing an ACK is different from the channel resource allocation scheme for transmitting a NACK.

Alternatively, after the base station instructs or assigns one of the channel resources to the UE through DCI, the UE uses the channel resource to derive the remaining three channel resources. In this example, the channel resource allocation pattern for transmitting ACK is the same for a certain UE as for transmitting NACK, but when the channel resources are channelizedDifferent channels are used. For example, as mentioned in configuration example 1

May be different.

Example 2

In another example, the mobile station may transmit two bits/NACK information using, for example, four PUCCH channel resources. The base station configures four channel resource groups to the UE through an upper RRC. Each group has three channel resources. The base station indicates one of the channel resource groups to the UE through two bits in the DCI. The UE transmits information including the ACK message using the three channel resources obtained in this manner. The base station configures another group of specific channel resources by sending a semi-static configuration, such as RRC, to the UE for the UE to transmit information containing only NACK messages using the group assigned to the UE.

Fig. 4 illustrates an exemplary block diagram of a mobile station 400 utilizing channel resources. Mobile station 400 includes at least one processor 410 and memory 405 having instructions stored thereon. The instructions, when executed by the processor 410, configure the mobile station 400 to perform several operations using various modules. The receiver 420 receives a first indication indicating a first plurality of channel resources allocated for the mobile station 400. The allocated channel resources module 425 processes the first indication to identify a first plurality of channel resources allocated for the mobile station 400.

Receiver 420 also receives a second indication indicating at least one channel resource assigned to mobile station 400. The first plurality of channel resources includes the at least one channel resource assigned to the mobile station 400. Assigned channel resource module 430 processes the second indication to identify the at least one channel resource assigned to mobile station 400.

In some embodiments, mobile station 400 also includes a determine channel resources module 435. Determine channel resources module 435 determines a second plurality of channel resources as further described in this patent document. The second plurality of channel resources includes the at least one channel resource assigned to the mobile station. The transmitter 415 transmits the one or more messages using the second plurality of channel resources. The one or more messages include an Acknowledgement (ACK) message, a Negative Acknowledgement (NACK) message, and a Scheduling Request (SR) message.

Fig. 5 illustrates an exemplary block diagram of a base station 500 managing channel resources. The base station 500 includes at least one processor 510 and memory 505 having instructions stored thereon. The instructions, when executed by the processor 510, configure the base station 500 to perform several operations using various modules.

The allocate channel resources module 525 determines channel resources to allocate to a plurality of mobile stations. As described in this patent document, a base station uses a first indication to communicate to a mobile station a first plurality of channel resources allocated to the mobile station. The base station 500 transmits, using the transmitter 515, a first indication indicating a first plurality of channel resources allocated for each of a plurality of mobile stations.

The assign channel resources module 530 determines an identity or value of at least one channel resource to assign to the mobile station. As described in this patent document, the base station uses the second indication to communicate to the mobile station at least one channel resource assigned to the mobile station. The base station uses the transmitter 515 to transmit a second indication indicating at least one channel resource assigned for each of the plurality of mobile stations. The first plurality of channel resources includes the at least one channel resource.

Receiver 520 receives one or more messages on a second plurality of channel resources from at least one of the plurality of mobile stations. The one or more messages include an Acknowledgement (ACK) message, a Negative Acknowledgement (NACK)

A (NACK) message and a Scheduling Request (SR) message.

The features described above are further described in the following three sections.

Section 1-shortened PUCCH (sPUCCH) resource management

Cyclic shift randomization of the sequence-based sPUCCH is repeated from 1ms operation to support multiplexing with the legacy PUCCH. The legacy PUCCH referred to herein refers to legacy PUCCH format 1/1a/1b, rather than PUCCH format 2/2a/2 b. Since the sTTI design is not optimal for N _ PRB < ═ 10. However, multiplexing the legacy PUCCH format 1/1a/1b and the PUCCH format 2/2a/2b in the hybrid RB is generally limited in the case of a small system bandwidth.

To support multiplexing between sequence-based sPUCCH and legacy PUCCH formats 1/1a/1b, the disclosed example embodiments consider sPUCCH resource indications and mapping rules from sPUCCH resources to PRB indices and cyclic shift indices.

Section A-sUCCH resource indication

In LTE, only one PUCCH resource is needed for PUCCH formats 1/1a/1b on each antenna. For a sequence-based sPUCCH, two or four sPUCCH resources may be required for 1/2-bit ACK/NACK transmissions. The following are three embodiments that may be considered for sPUCCH resource indication.

In the first exemplary embodiment, the UE may use the resources

It may depend on the lowest CCE index and the resource offset of the higher layer configuration. For antenna port p, one of sPUCCH resources passes

To determine that the rest can be passed

To implicitly indicate.

In the second exemplary embodiment, an additional HARQ-ACK Resource Offset (ARO) in DCI may be used in addition to the CCE index and the resource offset of the higher layer configuration. For example, possible values of ARO may be 0, -1, -2, and 2 for a 2-bit ARO. For the antenna port p it is possible to,

other resources may pass through

Either implicitly or explicitly by a different ARO.

In a third exemplary embodiment, a fixed number of resource values may be configured first by higher layers. And the one or more specific resource values are further determined by HARQ-ACK Resource Indication (ARI) in the DCI. For example, a 2-bit ARI may be used to select one group from four RRC-configured sPUCCH resource groups. For two antenna ports, the ARI maps to two groups of sPUCCH resources, with a first group for antenna port p0 and a second group for antenna port p 1.

Fig. 6 shows an exemplary PUCCH multiplexed with different TTI lengths. As depicted, HARQ-ACKs corresponding to the 1ms PDSCH transmitted in subframe # n, the 7-symbol sPDSCH in subframe (n +2), and the 2-symbol sPDSCH in subframe (n +3) need to be fed back in UL subframe (n + 4).

To allow multiplexing of different TTI lengths from different UEs in the same PRB, the later sPUCCH should avoid collision with the earlier PUCCH. The first exemplary embodiment using semi-dynamic indication is not always valid. For the second exemplary embodiment, the indication method may also be less flexible if only one sPUCCH resource is indicated by an ARO, or would result in high DCI overhead if all resources are indicated by AROs. However, the third exemplary embodiment provides a flexible way to indicate all sPUCCH resources together to the UE by defining several sPUCCH resource groups. Each sPUCCH resource group may contain two or four sPUCCH resources. Thus, for a sequence-based sPUCCH, the eNB may use 2 bits in the DCI to indicate one of four sPUCCH resource groups configured by RRC.

Mapping of node B-sPCH resources to ACK/NACK

For the 2/3-OS sequence-based sPUCCH format 1a (1 bit), two sUCCH resources

May be assigned to the UE for antenna port p. For the 2/3-OS sPUCCH format 1b (2 bits), four sUCCH resources

And allocating to the UE.

Regarding the mapping rule from the sPUCCH resource to ACK/NACK transmission, there may be two ways here.

In a first option, the first option is,the ACK/NACK information may be mapped to different PUCCH resources. An example for explaining the mapping process for the 2-OS sPUCCH format 1a is shown in FIG. 7. In fig. 7, if a 1-bit ACK is to be transmitted, the UE may use a cyclic shift on symbol/

And cyclic shift is used on symbol l +1

And

all are passed through

To derive. If a 1-bit NACK is to be transmitted, the UE may use a cyclic shift on symbol l

And cyclic shift is used on symbol l +1

And

all are passed through

To derive.

In the second option, the ACK/NACK information is mapped to different combinations of PUCCH resources. An example for the 3-OS sPUCCH format 1a is shown in FIG. 8. In fig. 8, if a 1-bit ACK is to be transmitted, the UE may use a cyclic shift on symbol/

Use on the symbol l +1

And cyclic shift is used on symbol l +2

By passing

To derive, but

And

by passing

Use on the symbol l +1

And cyclic shift is used on symbol l +2

And

all are passed through

To derive, but

By passing

To derive.

For both the first and second options, the ACK/NACK information is ultimately mapped to different cyclic shifts. And the first option and the second option are expected to have similar performance. However, in most cases, the first option uses only one PUCCH resource, e.g., the resource for ACK, since the UE is most likely to send an ACK. This may be detrimental to interference randomization. Therefore, the second option may be preferred for PUCCH resource to ACK/NACK mapping. Thus, for sequence-based sPUCCH, the ACK/NACK information may be mapped to different combinations of PUCCH resources.

Based on the allocated sPUCCH resources, the UE may further determine the srb index and cyclic shift used on each symbol. In the following section, the formulas used are derived from the legacy PUCCH operation.

Section 2 enhanced sequence selection PUCCH

Sequence-based design without RS for only small (1-2) payload size cases is referred to as sequence-based or sequence-selective PUCCH. The following sections further discuss the sequence selection PUCCH, and also disclose exemplary embodiments.

With respect to the sequence selection PUCCH in sTTI and New Radio (NR) specifications, we generally assume that all sequences allocated to a UE are distributed in one PRB. In an exemplary embodiment, to extend the distance of cyclic shifts for ACKs and NACKs, it is assumed that cyclic shifts { # i, # i +6} are used for 1-bit ACK/NACK {0,1} respectively, and cyclic shifts { # j, # j +3, # j +6, # j +9} are used for 2-bit ACK/NACK {00,01,11,10} respectively, where i ═ 0,1, ·,5 and j ═ 0,1, 2. Another advantage is that there are 6 or 3 tones in common to support coherent detection on the receive side.

However, when four sequences {0,3,6,9} are all mapped to one PRB, with SCS 60kHz and DS 1000ns, error floor occurs for 2-bit ACK/NACK transmission.

Each cyclic shift in a particular PRB may correspond to one unique PUCCH resource in a higher layer. From a higher layer perspective, it seems more accurate to use resource selection as a term for sequence selection PUCCH. I.e., the ACK/NACK information is mapped to different PUCCH resources, and each PUCCH resource corresponds to a specific cyclic shift in a specific PRB. The cyclic shift depends on the PUCCH resource assigned to the UE in one or more PRBs. For example, a case should be allowed in which the eNB allocates four PUCCH resources for 2-bit ACK/NACK transmission to the UE and they correspond to two cyclic shifts { #0, #6} in PRB # m and two cyclic shifts { #0, #6} in PRB # n. Since the distance of cyclic shift in each PRB is extended to 6, the error floor problem can be solved. Therefore, it may not be necessary to restrict the sequence allocated to the UE from being mapped to one PRB. Thus, the ACK/NACK information may be mapped to different PUCCH resources in a higher layer, and each PUCCH resource corresponds to a particular cyclic shift in a particular PRB.

For sequence-selective PUCCH, two or four PUCCH resources may be required for 1-bit or 2-bit ACK/NACK transmission per antenna. The multiplexing capacity is lower than DMRS based methods, similar to that in LTE. However, we find that the resources used for NACK transmission between different UEs may be the same in some cases. In table 8, two UEs share the same NACK resource in the higher layer, and the cyclic shift corresponding to this NACK resource is CS # 8. In this case, PUCCH resource overhead is saved by 25%. Theoretically, a maximum of 11 UEs with 1-bit ACK/NACK can be multiplexed in some PRBs.

TABLE 8-sharing NACK resources for 1-bit ACK/NACK transmission among 2 UEs

With a judicious detector no ambiguity is created at the eNB side. The eNB will detect NACK if one of the sharing UEs misses its PDCCH, if the other UE sends NACK, or DTX if the other UE sends ACK.

Section 3-PUCCH resource allocation for sequence selection PUCCH

Regarding NR PUCCH resource allocation for HARQ-ACK transmission, a PUCCH resource set is configured through higher layer signaling and PUCCH resources within the configured set are indicated through DCI. However, more than one PUCCH resource may be required for the exemplary sequence selection PUCCH. There are two possible ways to deal with this problem.

In the first exemplary embodiment, only one PUCCH resource is explicitly indicated by DCI.

One PUCCH resource within the configured set, definingIs n_PUCCH,0Indicated by DCI. Other PUCCH resources can be through n_PUCCH,0To implicitly indicate. For example,

wherein i ═ 1,2.. N-1. N is the total number of PUCCH resources required.

In a second exemplary embodiment, all PUCCH resources are explicitly indicated by DCI. One way is to indicate each PUCCH resource in the resource set separately through DCI. But this will increase DCI overhead. Another alternative is to define four PUCCH resource groups and each group contains N PUCCH resources. Two bits in the DCI may be used to indicate one group to the UE.

The first and second exemplary embodiments indicate that PUCCH resource allocation for sequence selection PUCCH should be considered in depth. If the NACK resource sharing mechanism proposed in section 2 is selected, in some embodiments, the PUCCH resource for NACK may be directly configured by RRC. Thus, in some embodiments, the resources used only for ACK transmission are configured by the two alternatives mentioned above.

In the New Radio (NR) discussion, a mobile station feeds back ACK/NACK information based on a Transport Block (TB) or a Code Block Group (CBG). The first plurality of channel resources allocated for the mobile station includes two types of channel resources. The first type of channel resources is used for TB-based feedback. The second type of channel resources is used for CBG-based feedback. When the base station indicates one or more first type channel resources to the mobile station, the mobile station will transmit ACK/NACK information based on TBs. If the base station indicates one or more second type channel resources to the mobile station, the mobile station transmits ACK/NACK information based on the CBG.

The term "exemplary" is used to mean an "… example," which does not imply an ideal or preferred embodiment unless otherwise stated.

Some embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, comprising computer-executable instructions (such as program code) for execution by computers in networked environments. Computer-readable media may include removable and non-removable storage devices, including but not limited to Read Only Memory (ROM), Random Access Memory (RAM), Compact Disks (CDs), Digital Versatile Disks (DVDs), and the like. Thus, a computer-readable medium may include a non-transitory storage medium. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

Portions of the disclosed embodiments may be implemented as a device or module using hardware circuitry, software, or a combination thereof. For example, a hardware circuit implementation may include separate analog and/or digital components, e.g., integrated as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as Application Specific Integrated Circuit (ASIC) and/or Field Programmable Gate Array (FPGA) devices. Some implementations may additionally or alternatively include a Digital Signal Processor (DSP), which is a specialized microprocessor whose architecture is optimized to meet the operational requirements of the digital signal processing associated with the functionality disclosed herein. Similarly, various components or sub-components within each module may be implemented in software, hardware, or firmware. Connections between modules and/or components within modules may be provided using any of the connection methods and media known in the art, including but not limited to communications over the internet, wired or wireless networks using suitable protocols.

Although this document contains many specifics, these should not be construed as limitations on the scope of the invention as claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple separate embodiments or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. Similarly, while operations depicted in the figures are performed in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.

Only a few implementations and examples are described and other implementations, enhancements and variations can be derived based on what is described and illustrated in this disclosure.

Claims

1.A method of wireless communication, comprising:

receiving, by a mobile station, a first indication indicating a first plurality of channel resources allocated for the mobile station;

receiving, by the mobile station, a second indication indicating at least one channel resource within the first plurality of channel resources and assigned to the mobile station; and

transmitting, by the mobile station, one or more messages using a second plurality of channel resources, the second plurality of channel resources comprising at least one channel resource assigned to the mobile station.

2. The method of claim 1, wherein the mobile station is operated to determine the second plurality of channel resources.

3. The method of claim 1, wherein the one or more messages are transmitted on one or more physical resource blocks.

4. The method of claim 3, further comprising:

dividing a channel resource value of the second plurality of channel resources by an uplink sequence length to obtain a value, an

Rounding the value down to the nearest integer value.

5. The method of claim 1, wherein receiving the first indication comprises receiving a Radio Resource Control (RRC) message that allocates the first plurality of channel resources to the mobile station.

6. The method of claim 1, wherein receiving the second indication comprises receiving Downlink Control Information (DCI) for assigning at least one of a first plurality of channel resources allocated to the mobile station.

7. The method of claim 1, wherein at least a subset of the first plurality of channel resources is divided into a plurality of groups, each group comprising at least two channel resources.

8. The method of claim 7, wherein

The plurality of groups includes a first group and a second group,

transmitting the one or more messages includes transmitting any one or more of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message,

a first cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is greater than a first threshold for transmitting the Acknowledgement (ACK) message,

a second cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is less than a second threshold for transmitting the Negative Acknowledgement (NACK) message, and

the first threshold is greater than or equal to the second threshold.

9. The method of claim 7, wherein

The plurality of groups includes a first group and a second group, and

a cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is greater than a threshold.

10. The method of claim 7, wherein

The plurality of groups includes a first group and a second group, and

a cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is less than a threshold.

11. The method of claim 7, wherein the plurality of groups are identified to the mobile station by any one of a Radio Resource Control (RRC) message and Downlink Control Information (DCI).

12. The method of claim 1, wherein the first plurality of channel resources and the second plurality of channel resources are a plurality of physical uplink control channel resources.

13. The method of claim 1, wherein the one or more messages comprise any one or more of: an Acknowledgement (ACK) message, a Negative Acknowledgement (NACK) message, and a Scheduling Request (SR) message.

14. The method of claim 13, further comprising:

determining, by the mobile station, one or more cyclic shift values for transmission of one or more messages.

15. The method of claim 14, wherein the mobile station transmits a Cyclic Shift (CS) value to represent an Acknowledgement (ACK) message, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

16. The method of claim 14, wherein the mobile station transmits a last cyclic shift value to represent a Negative Acknowledgement (NACK) message, wherein the last cyclic shift value is associated with a last channel resource of the second plurality of channel resources.

17. The method of claim 14, wherein the mobile station transmits one or more Cyclic Shift (CS) values to represent a Scheduling Request (SR) message, wherein the one or more cyclic shift values are not equal to cyclic shift values associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

18. The method of claim 14, wherein the mobile station transmits a Cyclic Shift (CS) value to represent either of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Scheduling Request (SR) message.

19. The method of claim 14, wherein the mobile station transmits a Cyclic Shift (CS) value to represent a combination of the Scheduling Request (SR) message and either of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

20. The method of claim 13 wherein the mobile station transmission is by multiplying data from the Negative Acknowledgement (NACK) message by a phase offset factor e^jθThe resulting value, where θ is any one of: cell-specific configuration parameters, group-specific configuration parameters, and mobile station-specific configuration parameters.

21. The method of claim 13, wherein the mobile station transmits the Scheduling Request (SR) message using a scheduling request channel resource allocated to the mobile station.

22. The method of claim 14, wherein the mobile station transmits a Cyclic Shift (CS) value to represent a combination of the Scheduling Request (SR) message and the Acknowledgement (ACK) message, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

23. The method of claim 13 wherein the mobile station transmits the combination of the Scheduling Request (SR) message and the Negative Acknowledgement (NACK) message using scheduling request channel resources allocated to the mobile station.

24. A method of wireless communication performed at a base station, the method comprising:

transmitting a first indication indicating a first plurality of channel resources allocated for each of a plurality of mobile stations;

transmitting a second indication indicating at least one channel resource assigned to each of the plurality of mobile stations; and

one or more messages on a second plurality of channel resources are received from at least one of the plurality of mobile stations.

25. The method of claim 24, wherein the one or more messages comprise a message indicating an Acknowledgement (ACK), a Negative Acknowledgement (NACK), and a Scheduling Request (SR) message.

26. The method of claim 25, wherein the base station receives a Cyclic Shift (CS) value representing the Acknowledgement (ACK) message from the at least one mobile station, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

27. The method of claim 25, wherein the base station receives a last cyclic shift value representing the Negative Acknowledgement (NACK) message from the at least one mobile station, wherein the last cyclic shift value is associated with a last channel resource of the second plurality of channel resources.

28. The method of claim 25, wherein the base station receives one or more Cyclic Shift (CS) values representing the Scheduling Request (SR) message from the at least one mobile station, wherein the one or more cyclic shift values are not equal to cyclic shift values associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

29. The method of claim 25, wherein the base station receives a Cyclic Shift (CS) value from the at least one mobile station representing either one of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Scheduling Request (SR) message.

30. The method of claim 25, wherein the base station receives a Cyclic Shift (CS) value from the at least one mobile station representing a combination of the Scheduling Request (SR) message and any of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message, wherein the cyclic shift value is not equal to a cyclic shift value associated with transmission of the Acknowledgement (ACK) message and the Negative Acknowledgement (NACK) message.

31. The method of claim 25, wherein the base station receives from the at least one mobile station data from the at least one mobile station by multiplying data from the Negative Acknowledgement (NACK) message by a phase offset factor e^jθThe resulting value, where θ is any one of: cell-specific configuration parameters, group-specific configuration parameters, and mobile station-specific configuration parameters.

32. The method of claim 25, wherein the base station receives a Scheduling Request (SR) message from the at least one mobile station on a scheduling request channel resource allocated to the mobile station.

33. The method of claim 25, wherein the base station receives a Cyclic Shift (CS) value from the at least one mobile station representing a combination of the Scheduling Request (SR) message and the Acknowledgement (ACK) message, wherein the cyclic shift value is not equal to a last cyclic shift value associated with a last channel resource of the second plurality of channel resources.

34. The method of claim 25, wherein the base station receives a combination of a Scheduling Request (SR) message or a Negative Acknowledgement (NACK) message on scheduling request channel resources allocated to the at least one mobile station from the at least one mobile station.

35. The method of claim 24, wherein the first plurality of channel resources are allocated using a Radio Resource Control (RRC) message transmitted to the plurality of mobile stations.

36. The method of claim 24, wherein the at least one channel resource is within the first plurality of channel resources and is assigned to each of the plurality of mobile stations by using downlink control channel information (DCI) transmitted to the plurality of mobile stations.

37. The method of claim 24, wherein at least a subset of the first plurality of channel resources is divided into a plurality of groups, each group comprising at least two channel resources.

38. The method of claim 37, wherein

The plurality of groups includes a first group and a second group,

receiving the one or more messages includes receiving any one or more of an Acknowledgement (ACK) message and a Negative Acknowledgement (NACK) message,

a first cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is greater than a first threshold for receiving the Acknowledgement (ACK) message,

a second cyclic shift difference between a first cyclic shift value of the first group of first channel resources and a second cyclic shift value of the second group of first channel resources is less than a second threshold for receiving the Negative Acknowledgement (NACK) message, and

the first threshold is greater than or equal to the second threshold.

39. The method of claim 37, wherein

The plurality of groups includes a first group and a second group, and

a cyclic shift difference between a first cyclic shift value of a first channel resource of the first group and a second cyclic shift value of a first channel resource of a second group is greater than a threshold.

40. The method of claim 37, wherein

The plurality of groups includes a first group and a second group, and

41. The method of claim 37, wherein the base station identifies the plurality of groups to the mobile station by transmitting any one of a Radio Resource Control (RRC) message and Downlink Control Information (DCI).

42. The method of claim 24, wherein the first plurality of channel resources and the second plurality of channel resources are a plurality of physical uplink control channel resources.

43. The method of claim 24, wherein the plurality of mobile stations is three mobile stations.

44. An apparatus for wireless communication, comprising a memory and a processor, wherein the processor reads code from the memory and implements the method of any of claims 1-23.

45. An apparatus for wireless communication comprising a memory and a processor, wherein the processor reads code from the memory and implements the method of any of claims 24-43.

46. A computer readable program storage medium having code stored thereon, which when executed by a processor causes the processor to implement the method of any one of claims 1 to 23.

47. A computer readable program storage medium having code stored thereon, which when executed by a processor, causes the processor to implement the method of any one of claims 24 to 43.