JP2014140176A - Apparatus, method and article of manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide more advanced control channel design solutions to support ACK/NAK bundling on a PUCCH.SOLUTION: A method includes: performing 1301 frequency domain acknowledgement/negative acknowledgement (ACK/NAK) bundling across component carriers within a user equipment reception bandwidth; generating 1302 a bundled ACK/NAK value corresponding to at least one code word on the basis of the performed ACK/NAK bundling; and including 1303 information relating to the generated bundled ACK/NAK value and the number of detected downlink grants within the user equipment reception bandwidth in an ACK/NAK resource to be transmitted on an uplink control channel.

Description

  The present invention relates to control channel design for mobile communication networks. More particularly, the invention relates to articles of manufacture including methods, apparatus, and computer readable media.

  In the continuous evolution of advanced wireless systems, carrier aggregation has been considered as one possibility to meet the backward compatibility requirements in one implementation of, for example, Long Term Evolution Advanced (LTE-A). LTE-A is the next step of LTE and meets the requirements for the fourth generation (4G) communication network defined by the International Telecommunication Union (ITU). LTE is also the next step of the Universal Mobile Telecommunications System (UMTS).

  As some of the main requirements for backward compatibility, for example, a Release 8E-UTRA (Enhanced UMTS Terrestrial Radio Access) terminal must be able to function with an Advanced E-UTRAN (Enhanced UMTS Terrestrial Radio Access Network), and Advanced E -The UTRA terminal must be able to function with Release 8E-UTRAN.

  LTE-A transmits control signals such as acknowledgment (ACK) / negative acknowledgment (NAK), channel quality indicator (CQI) and scheduling request (SR) indicator from the user equipment (UE) to the evolved Node B (eNB). In order to do so, a physical uplink control channel (PUCCH) is applied. There are two methods for transmitting an uplink control signal in LTE-A: (1) PUCCH and (2) PUSCH (physical uplink shared channel) that are time-divided with uplink data. The present application is mainly concerned with uplink control signals in PUCCH. From the uplink / downlink control signaling perspective, one solution is to copy the existing release 8 control plane (PDCCH, PUCCH, etc.) to the individual component carriers (CC). Hereinafter, this concept is shown as an NxPDCCH structure in LTE-Advanced. Due to the backward compatibility requirement, it is also assumed that Release 8 type PUCCH resources are reserved for each downlink component carrier that transmits the PDCCH. These resources reside on the corresponding uplink component carrier.

  One basic premise of LTE-Advanced was to support one transport block and HARQ (Hybrid Automatic Repeat Request) entity per component carrier. In general, it is understood that having one separate PDCCH per component carrier (NxPDCCH) seems to be a downlink control signaling scheme suitable for such system operation. From the perspective of uplink control signaling, there are several aspects that require special attention when using the NxPDCCH scheme. One aspect is cubic metric (CM) characteristics. When uplink / downlink resources are allocated to different component carriers, multicarrier transmission is always realized in the uplink. From an uplink perspective, single carrier transmission should always be targeted whenever CM can be minimized, i.e., simultaneous transmission of parallel PUCCHs (NxPUCCH) should be avoided. Another aspect is the range of control channels in the uplink. When more than one downlink component carrier is allocated, multi-ACK / NAK transmission (ACK / NAK multiplexing) is always realized. The uplink range is a problem related to multi-bit ACK / NAK. Therefore, ACK / NAK bundling, ie the presence of one common ACK / NAK in all downlink transport blocks and allocated component carriers, always ensures an optimized uplink range. Must be one option. Therefore, more advanced control channel design solutions are needed to support ACK / NAK bundling in PUCCH.

  The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key / critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented later.

  Various aspects of the invention include articles of manufacture including methods, apparatus, and computer readable media as defined in the independent claims. Further embodiments of the invention are disclosed in the dependent claims.

  According to an aspect of the present invention there is provided an apparatus as specified in claims 1, 10, 24 and 25.

  According to an aspect of the present invention there is provided a method as specified in claims 13 and 19.

  According to an aspect of the present invention there is provided an article of manufacture comprising a computer readable medium as specified in claim 21.

  Although various aspects, embodiments and features of the present invention are listed individually, all combinations of these various aspects, embodiments and features of the present invention are possible and these are the claimed inventions. Included in the range.

  Hereinafter, the present invention will be described in more detail by way of exemplary embodiments and with reference to the accompanying drawings.

1 is a simplified block diagram illustrating an example system architecture. FIG. FIG. 2 is a simplified block diagram illustrating an example of an apparatus suitable for use in the implementation of an exemplary embodiment of the invention. FIG. 3 is an example diagram illustrating a method according to an embodiment of the present invention. It is an example figure which shows the implementation structure of the method regarding FIG. FIG. 4 is an example diagram illustrating another implementation of the method relating to FIG. 3. FIG. 4 is an example diagram illustrating another implementation of the method relating to FIG. 3. FIG. 4 is an example diagram illustrating another implementation of the method relating to FIG. 3. FIG. 3 is an example diagram illustrating a method according to an embodiment of the present invention. It is an example figure which shows the implementation structure of the method regarding FIG. It is an example figure which shows another implementation structure of the method regarding FIG. It is an example figure which shows another implementation structure of the method regarding FIG. It is an example figure which shows another implementation structure of the method regarding FIG. FIG. 6 shows an example of a method according to an embodiment of the invention.

  DETAILED DESCRIPTION Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings that illustrate some but not all of the invention. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are applicable with this disclosure. It is provided to ensure that legal requirements are met. This specification refers to “an”, “one”, or “some” embodiments in several places, although this is not necessarily the case for each such It does not mean that the reference is to the same embodiment or that the feature applies only to a single embodiment. Other embodiments may be implemented by combining single features of different embodiments. Throughout, the same reference numerals indicate the same elements.

  The present invention is applicable to any user terminal, server, corresponding component, and / or any communication system, or any combination of different communication systems. The communication system may be a fixed communication system, a mobile communication system, or a communication system using both a fixed network and a mobile network. Particularly in wireless communication, specifications of protocols to be used, communication systems, servers, and user terminals are rapidly developing. Such development may require further changes to the embodiments. Accordingly, all words and expressions are to be interpreted broadly and are intended to be exemplary rather than limiting embodiments.

  In the following, various embodiments will be described using an architecture based on LTE / SAE (Long Term Evolution / System Architecture Evolution) network elements as examples of system architectures to which these embodiments may be applied. The form is not limited to such an architecture. Furthermore, in the following embodiment, an example in which HARQ is defined for a codeword / transport block will be described. However, any other HARQ entity / granularity can be used instead, i.e., HARQ-ACK can be associated with a codeword (physical layer entity) or transport block (MAC layer entity).

  An example of a wireless system to which the embodiment of the present invention can be applied will be considered with reference to FIG. In this example, the wireless system is based on LTE / SAE (Long Term Evolution / System Architecture Evolution) network elements. However, the invention described in these examples is not limited to LTE / SAE radio systems, but in other radio systems such as WIMAX (Worldwide Interoperability for Microwave Access) or other suitable radio It can also be realized in the system.

  The general architecture of a wireless system is shown in FIG. FIG. 1 is a simplified system architecture showing only some elements and functional entities, all of which are logical units and implementations may differ from those shown. The connections shown in FIG. 1 are logical connections, and actual physical connections may be different. It will be apparent to those skilled in the art that the system includes other functions and structures. Note that the functions, structures, elements, and protocols used in or for group communication are irrelevant to the actual invention. Therefore, they need not be described in more detail herein.

  The example wireless system of FIG. 1 includes an operator service core that includes elements such as an MME (Mobility Management Entity) 106 and an SAE GW (SAE Gateway) 108.

  The base station of the radio system, which can also be called eNB (extended node B), hosts functions for radio resource management such as radio bearer control, radio admission control, connection mobility control, and dynamic resource allocation (scheduling) To do. The MME 106 plays a role of delivering a paging message to the eNB 104.

  A user equipment (UE) 102, which may also be referred to as a mobile terminal, may communicate with the base station 104 using a signal 118. Signal 118 between UE 102 and base station 104 carries digital information such as traffic data or control data.

  Calls / services may be “long distance” where user traffic passes through the SAE GW 108. For example, a connection from the UE 102 to an external IP network such as the Internet 110 can be guided via the SAE GW 108. However, local calls / services are also possible in the exemplary wireless system.

  Each base station 104 in the wireless system broadcasts a signal 118, which can be a pilot signal, allowing the UE 102 to observe potential base stations for serving the UE 102. Based on this pilot signal, the mobile terminal selects a base station with which to start communication when the switch is turned on or a base station that performs handoff during normal operation.

  In the ACK / NAK bundling mode, both the UE 102 and the eNB 104 send how many resource allocation grants and corresponding data packets in the downlink, eNB 104 is receiving, and what these are received in the uplink. Only need to know if you need to ACK / NAK at the same time. Otherwise, the UE 102 can send a bundled ACK, but some downlink grants are lost and this type of error is indicated as a “DTX vs. ACK” error.

  To deal with this DTX vs. ACK error (or limit the probability of DTX vs. ACK to an acceptable level), for example in LTE Release 8 TDD (Time Division Duplex), the downlink grant in the “bundle window” The DAI (Downlink Distribution Index) field was included in the downlink and uplink grants to indicate information regarding the number of nodes.

  In LTE-Advanced FDD (Frequency Division Duplex) using NxPDCCH structure, one method to support ACK / NAK bundling is to reuse the method in LTE Release 8 TDD (ie, ACK / From the perspective of NAK signaling, consider the component carrier as a TDD subframe and include the DAI field in the downlink grant to handle DTX vs. ACK errors), which is a new DAI field in the existing DCI format. Means it should be added. Alternatively, the design of only the LTE-Advanced DCI format can be considered. However, both of these methods basically mean that the blind DCI decoding load of the LTE-Advanced terminal is increased. Another issue is that this DAI bit introduces additional system overhead compared to LTE Release 8 FDD (if there are two DAI bits in the UL / DL grant, the dynamically scheduled UE Additional control signal overhead of 2 kb / s per hit, per link (UL / DL) and per CC).

  From the viewpoint of UE power saving and system overhead, embodiments of the present invention show examples of non-DAI based solutions to support ACK / NAK bundling in LTE-Advanced FDD systems, for example.

  In one embodiment, a solution is proposed to support ACK / NAK bundling in LTE-Advanced PUCCH when using existing PDCCH design (NxPDCCH) without including DAI bit in downlink grant. . Note that no special configuration is required to support ACK / NAK multiplexing (small CM) when using existing PDCCH design and mapping table from Release 8 TDD [TS36.213, column 10.1] ].

In LTE-Advanced FDD using the NxPDCCH structure, the following method is easy to support ACK / NAK bundling in PUCCH without using DAI (M component carriers within the reception bandwidth of the UE). Is assigned semi-statically).
The eNB schedules PDCCH / PDSCH among all M CCs, or
ENB schedules the first N (consecutive) CCs (N <M). In such a method, the bundled ACK / NAK / DTX transmission is based on the last correctly received PDCCH and requires a predetermined CC numbering scheme.

  One advantage of these solutions is that there are no additional overhead requirements for DAI bits. However, strict scheduling constraints are still needed to maintain the DTX versus ACK probability at an acceptable level.

Accordingly, embodiments of the present invention describe a more advanced non-DAI based solution to support ACK / NAK bundling, such as in LTE-Advanced FDD.
Any number of CC allocations and full scheduling flexibility is supported,
The probability of DTX vs. ACK is limited to an acceptable level (ie 1E-4 or less),
Can be guaranteed.

  Before further describing an exemplary embodiment of the present invention, reference is made to FIG. 2, which is a simplified block diagram illustrating an example of an apparatus suitable for use in the implementation of the exemplary embodiment of the present invention.

  In FIG. 2, the wireless network is adapted to communicate with the UE 102 via at least one eNB 104. Although the devices 102, 104 are shown as a single entity, different modules and memories may be implemented in one or more physical or logical entities. At the same time, the UE 102 is configured to perform frequency (and / or spatial) domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across the component carriers within the reception bandwidth of the user equipment (UE reception bandwidth May be related to the following characteristics: UE specific or cell specific, may also be related to UE category, if UE specific, dynamically configured by UE specific higher layer signaling etc. For this purpose, the UE 102 sends and receives various outputs, information and messages to and from the processor 202. The reception bandwidth consists of component carriers from which the UE (such as PDSCH) can receive DL data. And a communication unit 200. The UE 102 may also include a memory for storing control information at least temporarily. The UE 102 is configured to generate a bundled ACK / NAK value corresponding to at least one codeword based on the ACK / NAK bundling performed (such as as part of the processor 202 and / or memory). ) Further includes a generator. The processor 202 then sends information about the generated bundled ACK / NAK value and the number of detected downlink grants within the received bandwidth of the user equipment to the ACK / NAK transmitted on the uplink control channel 210. Configured to be included in the resource. For example, the memory may contain computer program code, information, data, content, etc., such as a software application (for a detection device, etc.) or an operating system for the processor 202 to perform the steps associated with the operation of the device according to embodiments. Can be remembered. In the illustrated embodiment, the method in which the memory performs frequency and / or spatial domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across component carriers of the received bandwidth of the user equipment, performed ACK / NAK bundling. A method for generating a bundled ACK / NAK value corresponding to at least one codeword based on and a generated bundled ACK / NAK value and a detected downlink grant within a received bandwidth of the user equipment Instructions on how to include information about the number in ACK / NAK resources transmitted on the uplink control channel are stored. The memory may be, for example, random access memory (RAM), a hard drive, or other fixed data memory or storage device. Further, the memory or part thereof may be a removable memory detachably connected to the device.

  The communication unit 200 is configured to communicate with a device 104 that can be part of one or more base stations of a public mobile communication network. The user equipment 102 may be a user terminal that is part of a facility or apparatus that is configured to tie or tie a user terminal and its user to a subscription and allow the user to interact with the communication system. The user terminal shows information to the user so that the user can input the information. In other words, the user terminal may be any terminal that can receive and / or transmit information to and from the network and can be connected to the network wirelessly or via a fixed connection. Examples of user terminals include personal computers, game consoles, laptops (notebooks), personal digital assistants, mobile stations (mobile phones), and line phones. Typically, processing unit 202 is implemented with a microprocessor, signal processor or separate components, and associated software.

  Hereinafter, the function of the processor 202 will be described in more detail with reference to FIGS. It should be noted that the device can also include other different units. However, these are irrelevant to the present invention and therefore need not be described in more detail herein.

  The device 104 may be any network node or host that can provide at least some necessary functionality of the embodiments. Device 104 may be a network entity of a wireless system, such as an entity that is part of a base station. There can also be different modules of the device in different network entities of the system.

  In general, the device 104 may include a processor 224, a controller, a control unit, etc. connected to the device's memory and various interfaces 222. Generally, the processor 224 is a central processing unit, but may be an additional arithmetic processor. The processor includes a computer processor, application specific integrated circuit (ASIC), field programmable gate array (FPGA), and / or other hardware components programmed to perform one or more functions of the embodiments. be able to.

  Device 104 may include memory, including volatile and / or nonvolatile memory, and typically stores content, data, and the like. For example, the memory may be computer program code, such as a software application (for a detection device, etc.), or an operating system, information, data, content for the processor 224 to perform steps related to the operation of the device according to embodiments. Etc. can be stored. In the exemplary embodiment, memory is detected within the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource on the uplink control channel and the received bandwidth of the user equipment. A method of receiving information on the number of downlink grants, a method of performing ACK / NAK / DTX (intermittent transmission) detection based on the received information, and determining whether the state is correct based on ACK / NAK / DTX detection Store instructions on the method. The memory may be, for example, random access memory (RAM), a hard drive, or other fixed data memory or storage device. Further, the memory or part thereof may be a removable memory detachably connected to the device.

  By implementing the techniques described herein by various means, an apparatus that implements one or more functions described with the embodiments is not only a means of the prior art but also a corresponding apparatus described with the embodiments. Including means for performing one or more of the functions, and can include separate means for each distinct function, or these means perform two or more functions It can be configured as follows. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or a combination thereof. In the case of firmware or software, it can be implemented via modules (procedures, functions, etc.) that perform the functions described herein. The software code may be stored on any suitable processor / computer-readable data storage medium or memory unit (s) or manufactured article (s), and may be one or more processors / computers. Can be executed by. The data storage medium or memory unit may be implemented within the processor / computer or external to the processor / computer, in which case it is communicatively coupled to the processor / computer via various means as is known in the art. be able to.

  The memory can store executable code or programs (such as software or firmware), electronic data, databases, or other digital information, and can include processor-usable media. The processor-usable medium may include, store, or retain programs, data, or digital information for use by or in connection with the instruction execution system including the processors 202, 224 in the exemplary embodiment. It can be embodied in the form of any computer program product or article of manufacture. For example, exemplary processor usable media may include any one of electronic, magnetic, optical, electromagnetic, and physical media such as infrared or semiconductor media. Some specific examples of processor usable media include, but are not limited to, portable magnetic computer diskettes such as floppy diskettes, zip disks, hard drives, random access memory, read only memory, Examples include flash memory, cache memory, or other configurations that can store programs, data, or other digital information.

  At least some embodiments or aspects described herein may be stored in a suitable memory as described above or communicated via a network or other transmission medium and configured to control a suitable processor. Can be realized using. For example, the program may be a data signal communicated via a suitable transmission medium, such as embodied in an article of manufacture, a communication network (such as the Internet or a private network), a wired electrical connection, an optical connection, or electromagnetic energy. Can be provided via a suitable medium, including those embodied within (modulated carrier, data packet, digital display, etc.), eg, via a communications interface, or using another suitable communications structure or medium Can be provided. An exemplary program that includes processor-usable code can communicate as a data signal embodied in a carrier wave, but this is only an example.

  In certain embodiments, the processor 202 is further configured to perform spatial domain bundling across two ACK / NAK bits corresponding to at least two spatial codewords.

  In an embodiment, the generator generates one bundled ACK / NAK bit for all transmitted downlink transport blocks in all component carriers and corresponding to at least two spatial codewords. Is further configured to generate a bundled ACK / NAK value.

In an embodiment, the processor is configured to perform ACK / NAK bundling on the physical uplink shared channel by using N bits representing the N ² state.

  In an embodiment, the generator is further configured to select an available state from the set of orthogonal states based on the generated bundled ACK / NAK value and the number of detected grants. Possible orthogonal states are states that can be used by arrangement of modulations (BPSK (Binary Phase Shift Keying) / QPSK (Quadrature Phase Modulation), etc., states that can be used by no transmission (ie, DTX), and multiple Information transmitted on the uplink control channel, including one or more states available by occupying the resources, is conveyed by the selection of the orthogonal state. A predetermined number of orthogonal states are available, two of the four states are available per resource due to the BPSK / QPSK arrangement, one state being a DTX (and corresponding to a state without transmission) DTX + NAK). There may also be an additional state (Nx) available when using multiple resources, such as by ensuring multiple (Nx) CCEs (control channel elements). Thus, the UE can select one state based on information about the generated bundled ACK / NAK value and the number of detected downlink grants.

  In an embodiment, the information transmitted on the uplink control channel includes one or more information bits, and the values of the two information bits are the value of the bundled ACK / NAK bit and the detected downlink grant. Depends on the number. In an embodiment, the value of one of the two information bits is equal to the number of received / detected downlink grants within the user equipment's receive bandwidth. In some embodiments, the value of one of the two information bits is equal to the bundled ACK / NAK value.

  In some embodiments, the processor performs a predetermined mapping to map two information bits into at least four states, each defined as an ACK or NAK, each spanning two spatial codewords and one or more downlink grants. Further configured to.

  In one embodiment, state 0 is NAK over two spatial codewords and all downlink grants, state 0, two spatial codewords and ACK over one or four downlink grants, one, two spaces Predetermined to map two information bits into four states: state 2 which is ACK over codeword and 2 or 5 downlink grants, state 3 which is ACK over 2 spatial codewords and 3 downlink grants Further configured to perform the mapping. In one embodiment, four states are mapped to QPSK constellation points (or piSK rotated QPSK constellation points).

  In some embodiments, the processor is further configured to cause the NAK and DTX to share the same state if the bundled ACK / NAK value is NAK. In some embodiments, if the result of the bundling is ACK, the state 0, 2 spatial codewords and 2 downlink grants are ACK over 2 spatial codewords and 1 or 5 downlink grants. Two information in four states: state 1 that is ACK over 1, state 2 that is ACK over 3 spatial grants and 3 downlink grants, state 2 that is ACK over 2 spatial codewords and 4 downlink grants It is further configured to perform a predetermined mapping to map the bits. In one embodiment, four states are mapped to QPSK constellation points (or piSK rotated QPSK constellation points).

  In an embodiment, the processor 202 performs a predetermined mapping to map one or two information bits to QPSK modulation symbols and corresponds to a bundled ACK over an odd number of downlink grants in the constellation map; , Further configured to ensure a maximum Euclidean distance between states corresponding to bundled ACKs over an even number of downlink grants.

  In some embodiments, the information transmitted on the uplink control channel includes one or two information bits, and the ACK / NAK resource is one of the ACK / NAK channels selected based on a predetermined downlink grant. . In one embodiment, the value of this one or two information bits is equal to the bundled ACK / NAK value. In an embodiment, the processor is configured to determine the first or second ACK / NAK channel based on the number of received / detected downlink grants within the received bandwidth of the user equipment.

  In some embodiments, when using one codeword transmission, processor 202 may be NAK over all downlink grants or state 0, 1 or 4 down with ACK over one or five downlink grants. State ACK over link grant or ACK over two downlink grants State 1, ACK over two downlink grants or State ACK over three downlink grants State 2, over three downlink grants It is further configured to perform a predetermined mapping to map one information bit value and ACK / NAK channel selection to four states, state 3 being ACK or ACK over 4 downlink grants.

  In one embodiment, when using one codeword transmission, if the result of bundling is NAK, the processor will share the same state with NAK and DTX, and this state has the value of one information bit and State 0, which is ACK over two spatial codewords and one or five downlink grants, if a predetermined mapping is performed to map the selection of ACK / NAK channels and the result of the bundling is ACK State ACK over 2 spatial codewords and 2 downlink grants, State 2 ACK over 2 spatial codewords and 3 downlink grants, ACK over 2 spatial codewords and 4 downlink grants Perform a predetermined mapping to map two information bits to four states, state 3 Configured.

  In one embodiment, when two codeword transmissions are used, the processor sets information bits in eight orthogonal states, each indicating information about the bundled ACK / NAK result value and the number of detected downlink grants. A predetermined mapping is performed to map the value and ACK / NAK channel selection.

  In certain embodiments, at least one downlink grant within the user device's receive bandwidth includes more than one control channel element (CCE) and more than one ACK / NAK channel.

  In an embodiment, if the information includes two information bits, the processor is configured to determine the value of the two information bits based on the number of detected downlink grants and the bundled ACK / NAK value. The

  In an embodiment, the processor indicates the number of received or detected downlink grants within the reception bandwidth of the user equipment having two information bits, and is based on the bundled ACK / NAK value of the ACK / NAK channel. It is configured to select one.

  In an embodiment, the processor sends an ACK / NAK value by using one bit to indicate the number of received or detected downlink grants within the user equipment's receive bandwidth using channel selection. Configured as follows.

  In an embodiment, the processor determines a combination of two information bit values and selects one of the ACK / NAK channels based on information about the bundled ACK / NAK result and the number of detected downlink grants. Configured to do.

  In an embodiment, the interface 222 is detected within the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource on the uplink control channel and the received bandwidth of the user equipment. Configured to receive information regarding the number of downlink grants, processor 224 performs ACK / NAK / DTX (intermittent transmission) detection based on the received information and based on the ACK / NAK / DTX detection Is configured to determine whether the detected ACK / NAK status represents a correct ACK / NAK.

  In certain embodiments, the processor 224 is configured to allocate resources to one or more component carriers based on the results of ACK / NAK / DTX detection.

  In an embodiment, the processor 224 is configured to make a scheduling decision based on the detected ACK / NAK / DTX.

  In an embodiment, based on processing means for performing frequency domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across the component carriers of the user equipment reception bandwidth and based on the performed ACK / NAK bundling Generating means for generating a bundled ACK / NAK value corresponding to at least one codeword and information regarding the generated bundled ACK / NAK value and the number of detected downlink grants; And a processing means for inclusion in an ACK / NAK resource transmitted on the control channel.

  In an embodiment, the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource in the uplink control channel and the detected downlink grant within the user device's received bandwidth. Receiving means for receiving information about the number, processing means for performing ACK / NAK / DTX (intermittent transmission) detection based on the received information, and status is correct based on ACK / NAK / DTX detection And processing means for determining whether or not.

  The following example describes an embodiment of a non-DAI based method for supporting ACK / NAK bundling on PUCCH in LTE-Advanced FDD with NxPDCCH structure. One common method that can be specified is that for bundled ACK / NAK messages and / or ACK / NAK resources transmitted on the PUCCH, the number of received / detected DL grants within the UE's reception bandwidth. It is that the predetermined information regarding is included.

Example Embodiment 1 rules:
Perform spatial domain bundling across two ACK / NACK bits corresponding to two spatial codewords. However, this step is not necessary in the case of a single codeword transmission.
Perform frequency domain bundling across all CCs in the UE's receive bandwidth and transmit to all DL transport blocks corresponding to at least two spatial codewords transmitted on all CCs in the UE's receive bandwidth In contrast, one bundled ACK / NAK bit is generated.
-The UE transmits two information bits on the ACK / NAK resource.
On the eNB side, the eNB performs ACK / NAK / DTX detection on the expected ACK / NAK channel and checks whether the state is correct.

  In one embodiment, the value of these two bits depends on the number of bundled ACK / NAK bit values and the detected DL grant within the UE's receive bandwidth. In some embodiments, the ACK / NAK resource to use may be predetermined (as in the A / N resource obtained from the DL grant last received / detected in the frequency domain). In one embodiment, a predetermined mapping is used to map two information bits to a QPSK modulation symbol, which ensures that the neighboring state should have the maximum Euclidean distance in the placement map. It is.

  Embodiment 1 provides, for example, a non-DAI-based solution without additional control overhead, can support any number of component carrier assignments and full scheduling flexibility, and the probability of DTX vs. ACK error Provides several advantages, such as being able to limit to an acceptable level.

Example Embodiment 2 rules:
Perform frequency domain ACK / NAK bundling over CC of UE's reception bandwidth per spatial codeword.
UE sends one or two information bits (such as {b (0)} or {b (0), b (1)}) on one of the ACK / NAK channels obtained from DL grant #i .

In an embodiment, the value of the information bits and the selection of the ACK / NAK channel depend on the bundled ACK / NAK value and the number of detected DL grants in the UE's reception bandwidth. In some embodiments, the value of i is predetermined (such as a DL grant that includes more than one CCE detected first or last).
• At least one DL grant within the UE's receive bandwidth includes more than one CCE (Note: this DL grant can be present on any CC within the UE's receive bandwidth).
On the eNB side, the eNB performs ACK / NAK / DTX detection on the expected ACK / NAK channel and checks whether the state is correct.

  Embodiment 2 provides, for example, a non-DAI-based solution without additional control overhead, can support any number of component carrier allocations without the need for spatial bundling, and DTX vs. ACK error Provides several advantages such as being able to limit the probability of

Example Embodiment 3 rules combining Embodiments 1 and 2 above:
For MIMO, perform spatial domain bundling across two ACK / NACK bits corresponding to two spatial codewords.
Perform frequency domain bundling across the UE's reception bandwidth and generate one bundled ACK / NAK bit per UE within the UE's reception bandwidth.
-The UE transmits two information bits (such as {b (0), b (1)}) on an ACK / NAK resource that is one of the ACK / NAK channels obtained from a given DL grant.

In an embodiment, the value of the two bits and the channel selection depend on the number of DL grants received / detected and the bundled ACK / NAK values. The combinations can be as follows:
Indicates the number of DL grants received / detected within the UE's receive bandwidth using two bits, channel selection depends on the value of the bundled ACK / NAK, or
The number of DL grants received / detected within the reception bandwidth of the UE using one bit to send the bundled ACK / NAK value and another bit and channel selection combination Or
The combination of the value of the two information bits and the channel selection depends on the information about the bundled ACK / NAK result and the number of detected DL grants.
• At least one DL grant within the UE's receive bandwidth includes more than one CCE (Note: this DL grant can be present on any CC within the UE's receive bandwidth).

  Embodiment 3 provides, for example, a non-DAI based solution without additional control overhead, can support any number of component carrier allocations, and has more state to deal with DTX vs. ACK errors. It offers several advantages that can be utilized, i.e., improved error case handling capabilities.

  FIG. 3 shows an example diagram of a method according to an embodiment of the present invention as in the first embodiment. Codeword # 1 and codeword # 2 are made up of M component carriers 301, 302,. . . , 304 and 311, 312,. . . 314. First, spatial domain bundling is performed over two ACK / NAK bits corresponding to two spatial codewords (codeword # 1 and codeword # 2). This is indicated by broken lines surrounding component carrier bits 301 and 311, 302 and 312, and 304 and 314. Next, perform frequency domain bundling across the component carriers of the UE's receive bandwidth (indicated by dashed circle 320), and on all component carriers that are within the UE's receive bandwidth and correspond to two spatial codewords One bundled ACK / NAK bit 316 is generated for every downlink transport block transmitted.

  Next, the UE transmits two information bits (such as {b (0), b (1)}) with ACK / NAK resources, and (1) the value of one bit is within the reception bandwidth of the UE. Equal to the number of downlink grants received / detected MOD2 (ie Number_of_RX_DL_Grant Mod2), (2) the value of the other bit is equal to the value of the bundled ACK / NAK, and (3) the ACK / NAK resources are predetermined (such as ACK / NAK resources obtained from the last received downlink grant in the frequency domain).

Next, examples of different options that can be used to implement the method according to embodiment 1 of FIG. 3 will be described.
Option 1-1
Name the value of one bit as a “checking bit” (eg b (0) in the example below), which is equal to the number MOD2 for the received / detected downlink grant within the UE's receive bandwidth ( That is, Number_of_RX_DL_Grant MOD2),
The value of the other bit (eg b (1) in the following example) is equal to the value of the bundled ACK / NAK value.
Option 1-2:
Map two bits to the following four states using a given mapping:
State 0: NAK over two spatial codewords and all DL grants,
O State 1: ACK over two spatial codewords and one or four DL grants,
O State 2: ACK over 2 spatial codewords and 2 or 5 DL grants,
O State 3: ACK over 2 spatial codewords and 3 DL grants.
Option 1-3:
If the result of bundling is NAK, let NAK and DTX share the same state.
When the result of bundling is ACK, two bits are mapped to the following four states using a predetermined mapping.
O State 0: ACK over 2 spatial codewords and 1 / or 5 DL grants o State 1: ACK over 2 spatial codewords and 2 DL grants,
O State 2: ACK over 2 spatial codewords and 3 DL grants,
O State 3: ACK over 2 spatial codewords and 4 DL grants.

  In some embodiments, the ACK / NAK resource to use may be predetermined (such as the A / N resource obtained from the last received / detected DL grant in the frequency domain in the example below).

  In one embodiment, a predetermined mapping is used to map two information bits to a QPSK modulation symbol, which ensures that the state of the neighborhood should have the maximum Euclidean distance in the placement map. Should.

  On the eNB side, the eNB performs ACK / NAK / DTX detection on the expected ACK / NAK channel and checks whether the state is correct.

  4 to 7 show examples of handling error cases related to the above-described first embodiment. Assume that there are 4 chunks in the UE's receive bandwidth and that 3 downlink grants have been allocated (using double codewords).

  FIG. 4 is an example diagram of an implementation configuration of the method relating to FIG. In the example of FIG. 4, it is assumed that all downlink grants have been correctly received / detected. The codeword # 1 and codeword # 2 shown in FIG. 4 include M component carriers 401, 402,. . . , 404, and 411, 412,. . . 414. First, spatial domain bundling is performed over two ACK / NAK bits corresponding to two spatial codewords (codeword # 1 and codeword # 2). This is indicated by broken lines surrounding component carrier bits 401 and 411, 402 and 412, and 404 and 414. Next, perform frequency domain bundling across the component carriers of the UE's receive bandwidth (indicated by dashed circle 420) and on all component carriers that are within the UE's receive bandwidth and correspond to two spatial codewords One bundled ACK / NAK bit 416 is generated for every downlink transport block transmitted.

  Next, the UE sends two information bits with ACK / NAK resources, (1) the value of one bit is equal to Number_of_RX_DL_Grant MOD2, where Number_of_RX_DL_Grant = 3, and therefore b (0) = 3 MOD 2 = 1, and (2) the value of the other bit is equal to the value of the bundled ACK / NAK, here Bundled_AN_Value = 1, so b (1) = 1. The UE transmits {1, 1} on the ACK / NAK resource corresponding to the CC # 4 downlink grant. eNB: (1) b (0) is equal to 1, (2) ACK / NAK channel to be used is obtained from CC # 4 downlink grant and there is no DTX vs. ACK error The check process is performed.

  FIG. 5 is an example diagram of another implementation of the method relating to FIG. In the example of FIG. 5, the CC # 2 downlink grant is lost (no DTX vs. ACK error). Code word # 1 and code word # 2 shown in FIG. 5 are M component carriers 501, 502,. . . , 504, and 511, 512,. . . 514. First, spatial domain bundling is performed over two ACK / NAK bits corresponding to two spatial codewords (codeword # 1 and codeword # 2). This is indicated by two dashed lines surrounding component carrier bits 501 and 511 and 504 and 514. Next, perform frequency domain bundling across the component carriers of the UE's receive bandwidth (indicated by dashed circle 520), and on all component carriers that are within the UE's receive bandwidth and that correspond to two spatial codewords One bundled ACK / NAK bit 516 is generated for every downlink transport block transmitted.

  The UE then sends two information bits on the ACK / NAK resource: (1) The value of one bit is equal to Number_of_RX_DL_Grant, where Number_of_RX_DL_Grant = 2, so b (0) = 2 MOD 2 = 0, and (2) the value of the other bit is equal to the value of the bundled ACK / NAK, here Bundled_AN_Value = 1, so b (1) = 1. The UE transmits {0, 1} using the ACK / NAK resource corresponding to the CC # 4 downlink grant. The eNB can detect an error due to an incorrect b (0) value. Therefore, no DTX vs. ACK error occurs.

  FIG. 6 is an example diagram of another implementation of the method relating to FIG. In the example of FIG. 6, the CC # 2 and CC # 4 downlink grants are missing (there is no DTX vs. ACK error). The codeword # 1 and codeword # 2 shown in FIG. 6 have M component carriers 601, 602,. . . , 604, and 611, 612,. . . , 614. First, spatial domain bundling is performed over two ACK / NAK bits corresponding to two spatial codewords (codeword # 1 and codeword # 2). This is indicated by a broken line surrounding component carrier bits 601 and 611. Next, perform frequency domain bundling across the component carriers of the UE's receive bandwidth (indicated by dashed circle 620), and on all component carriers that are within the UE's receive bandwidth and correspond to two spatial codewords One bundled ACK / NAK bit 616 is generated for every downlink transport block transmitted.

  Next, the UE sends two information bits with ACK / NAK resources, (1) the value of one bit is equal to Number_of_RX_DL_Grant = 1, so b (0) = 1 MOD 2 = 1, (2 ) The value of the other bit is equal to the value of the bundled ACK / NAK, where Bundled_AN_Value = 1, so b (1) = 1. The UE transmits {1, 1} on the ACK / NAK resource corresponding to the CC # 1 downlink grant. The eNB can detect an error due to an incorrect ACK / NA resource. Therefore, no DTX vs. ACK error occurs.

  FIG. 7 is an example diagram of another implementation of the method relating to FIG. In the example of FIG. 7, the downlink grants in CC # 1 and CC # 2 are lost and there is a DTX vs. ACK error. However, assuming that the probability of one downlink grant failing is less than 1E-2, the error probability is less than 1E-4. In addition, no error case occurs when option 1-2 or 1-3 of this method is used. The codeword # 1 and codeword # 2 shown in FIG. 7 include M component carriers 701, 702,. . . , 704, and 711, 712,. . . , 714. First, spatial domain bundling is performed over two ACK / NAK bits corresponding to two spatial codewords (codeword # 1 and codeword # 2). This is indicated by the dashed lines surrounding component carrier bits 704 and 714. Next, perform frequency domain bundling across the component carriers of the UE's receive bandwidth (indicated by dashed circle 720), and on all component carriers that are within the UE's receive bandwidth and correspond to two spatial codewords One bundled ACK / NAK bit 716 is generated for every downlink transport block transmitted.

  Next, the UE sends two information bits with ACK / NAK resources, (1) the value of one bit is equal to Number_of_RX_DL_Grant = 1, so b (0) = 1 MOD 2 = 1, (2 ) The value of the other bit is equal to the value of the bundled ACK / NAK, where Bundled_AN_Value = 1, so b (1) = 1. The UE transmits {1, 1} on the ACK / NAK resource corresponding to the CC # 4 downlink grant. The eNB cannot detect a DTX vs. ACK error. However, the error probability is about 1E-4. In some embodiments, lost cases across different chunks can be considered independent.

  FIG. 8 is an example of another method according to the embodiment of the present invention, that is, the second embodiment. Codeword # 1 and codeword # 2 are made up of M component carriers 801, 802,. . . , 804, and 811, 812,. . . 814. First, for each spatial codeword, perform a frequency domain ACK / NAK bundling across CCs within the UE's reception bandwidth (indicated by dashed circles 820 and 822) and within the UE's reception bandwidth Bundled ACK / NAK bits 816 and 818 are generated for all downlink transport blocks transmitted on all component carriers corresponding to two spatial codewords.

Next, the UE can either take one (such as {b (0)} or {b (0), b (1)}) on the first or second ACK / NAK channel obtained from downlink grant #i or Send two information bits. The value of the information bit (s) and the selection of the ACK / NAK channel can be determined based on the following options:
Option 2-1
The value of the information bit (s) is equal to the bundled ACK / NAK result.
-The UE uses the first or second ACK / NAK channel depending on the number of received / detected downlink grants within the UE's receive bandwidth. In the following example:
O Number_of_RX_DL_Grant If MOD2 is equal to 0, the UE uses the first channel;
O Number_of_RX_DL_Grant If MOD2 is equal to 1, the UE uses the second channel.
Option 2-2:
For a single codeword, a predetermined mapping can be used to map information bit values and ACK / NAK channel selection into the following four states (option 2-2-1):
State 0: NAK over all DL grants or ACK, over 1 or 5 DL grants,
O State 1: ACK over one or four DL grants, or ACK, over two DL grants,
State 2: ACK over 2 or 5 DL grants, or ACK over 3 DL grants,
O State 3: ACK over 3 DL grants or ACK over 4 DL grants.
For one codeword, another possibility is to map the value of information bits and ACK / NAK channel selection to the following states using a predetermined mapping (option 2-2-2) .
If the result of bundling is NAK, make NAK and DTX share the same state.
When the result of bundling is ACK, two bits are mapped to the following four states using a predetermined mapping.
State 0: ACK over 2 spatial codewords and 1 or 5 DL grants State 1: ACK over 2 spatial codewords and 2 DL grants,
State 2: ACK over 2 spatial codewords and 3 DL grants,
State 3: ACK over 2 spatial codewords and 4 DL grants.
For two codewords, map the value of information bits and ACK / NAK channel selection to 8 orthogonal states using a predetermined mapping.
Use each state to indicate information about the value of the bundled ACK / NAK result and the number of detected downlink grants.

  The value of i is predetermined (as in the example below, such as the last detected DL grant that contains more than one CCE).

  Further, assume that at least one downlink grant within the UE's receive bandwidth includes more than one CCE (Note: this DL grant must be present in any CC within the UE's receive bandwidth. Can do).

  On the eNB side, the eNB performs ACK / NAK / DTX detection on the expected ACK / NAK channel and checks whether the state is correct.

  9 to 12 show examples of handling error cases related to the second embodiment described above. Assume that there are 4 chunks in the UE's receive bandwidth and that 3 downlink grants are allocated (a double codeword is used).

  FIG. 9 is an example of an implementation configuration of the method related to FIG. In the example of FIG. 9, it is assumed that all downlink grants have been received / detected. The codeword # 1 and codeword # 2 shown in FIG. 9 include M component carriers 901, 902,. . . , 904, and 911, 912,. . . 914. First, a frequency domain ACK / NAK bundling across the component carriers of the UE's reception bandwidth is performed (indicated by dashed circles 920 and 922) and is within the UE's reception bandwidth and corresponds to two spatial codewords Bundled ACK / NAK bits 916 and 918 are generated for all downlink transport blocks transmitted on all component carriers.

  Next, the UE transmits the information bit (s) on the ACK / NAK resource, (1) the value of the information bit is equal to the bundled ACK / NAK result, where Number_of_RX_DL_Grant = 3 Yes, so the UE sends the bundled ACK / NAK on the second channel obtained from CC # 4 downlink grant. The eNB checks that the ACK / NAK channel to be used is the second channel obtained from the CC # 4 downlink grant. Therefore, no DTX vs. ACK error occurs.

  FIG. 10 is an example diagram of another implementation of the method relating to FIG. In the example of FIG. 10, it is assumed that the downlink grant of CC # 2 is lost (there is no DTX vs. ACK error). Code word # 1 and code word # 2 shown in FIG. 10 are M component carriers 1001, 1002,. . . , 1004, and 1011, 1012,. . . 1014. First, frequency domain ACK / NAK bundling across the entire component carrier of the UE's reception bandwidth is performed (indicated by dashed circles 1020 and 1022) and is within the UE's reception bandwidth and corresponds to two spatial codewords. Bundled ACK / NAK bits 1016 and 1018 are generated for all downlink transport blocks transmitted on all component carriers.

  The UE then sends the information bit (s) on the ACK / NAK resource, and (1) the value of the information bit is equal to the bundled ACK / NAK result, where Number_of_RX_DL_Grant = 2 Yes, so the UE sends the bundled ACK / NAK on the first channel obtained from CC # 4 downlink grant. The UE uses an incorrect ACK / NAK channel. Therefore, no DTX vs. ACK error occurs.

  FIG. 11 is an example diagram of another implementation of the method of FIG. In the example of FIG. 11, it is assumed that the CC # 2 and CC # 4 downlink grants are missing (there is no DTX vs. ACK error). The codeword # 1 and the codeword # 2 illustrated in FIG. 11 include M component carriers 1101, 1102,. . . , 1104, and 1111, 1112,. . . 1114. First, frequency domain ACK / NAK bundling across the component carriers of the UE's receive bandwidth is performed (indicated by dashed circles 1120 and 1122) and is within the UE's receive bandwidth and corresponds to two spatial codewords. Bundled ACK / NAK bits 1116 and 1118 are generated for all downlink transport blocks transmitted on all component carriers.

  Next, the UE transmits the information bit (s) on the ACK / NAK resource, (1) the value of the information bit is equal to the bundled ACK / NAK result, where Number_of_RX_DL_Grant = 1 Yes, so the UE sends the bundled ACK / NAK on the second channel obtained from CC # 1 downlink grant. The UE uses an incorrect ACK / NAK channel. Therefore, no DTX vs. ACK error occurs.

  FIG. 12 is an example diagram of another implementation of the method relating to FIG. In the example of FIG. 12, it is assumed that the CC # 1 and CC # 2 downlink grants are lost and there is a DTX vs. ACK error. However, assuming that the probability of one downlink grant failing is less than 1E-2, the error probability is less than 1E-4. Furthermore, no error case occurs when option 2-2 of this method is used. The codeword # 1 and codeword # 2 shown in FIG. 12 include M component carriers 1201, 1202,. . . 1204 and 1211, 1212,. . . , 1214. First, a frequency domain ACK / NAK bundling across the component carriers of the UE's reception bandwidth is performed (indicated by dashed circles 1220 and 1222) and is within the UE's reception bandwidth and corresponds to two spatial codewords. Bundled ACK / NAK bits 1216 and 1218 are generated for all downlink transport blocks transmitted on all component carriers.

  Next, the UE transmits the information bit (s) on the ACK / NAK resource, (1) the value of the information bit is equal to the bundled ACK / NAK result, where Number_of_RX_DL_Grant = 1 Yes, so the UE sends the bundled ACK / NAK on the second channel obtained from CC # 4 downlink grant. The UE cannot detect errors. Therefore, there is a DTX vs. ACK error with a probability of about 1E-4.

The implementation configuration of the third embodiment (that is, the combination of the first and second embodiments) can include the following.
Perform spatial domain bundling across two spatial codewords.
-Next, perform frequency domain bundling across the UE's receive bandwidth to generate one bundled ACK / NAK bit within the UE's receive bandwidth for two spatial codewords.
-The UE sends two information bits (such as {b (0), b (1)}) on one of the ACK / NAK channels obtained from a given DL grant.
○ Option 3-1
Use 2 bits (such as {b (0), b (1)}) to indicate Number_of_RX_DL_Grant MOD4.
A given DL grant may be the first or last detected DL grant that contains more than one CCE.
-The UE transmits {b (0), b (1)} on the first or second ACK / NAK channel according to the bundled ACK / NAK value.
○ Option 3-2:
1 bit (such as b (0)) is equal to the bundled ACK / NAK value.
A given DL grant may be the first or last detected DL grant that contains more than one CCE.
Use a combination of the value of another bit (such as b (1)) and ACK / NAK channel selection between the first and second ACK / NAK channels to indicate Number_of_RX_DL_GrantMOD4.
○ Option 3-3:
A given DL grant may be the first or last detected DL grant that contains more than one CCE.
The combination of 2-bit value and channel selection depends on the value of the bundled ACK / NAK result (s) and the number of detected DL grants.

  A general advantage of different embodiments of the present invention is that it provides several methods for supporting ACK / NAK bundling, such as in LTE-Advanced systems based on the use of existing PDCCH designs (NxPDCCH). is there. ACK / NAK bundling is necessary to optimize the uplink range in LTE-Advanced systems. Bundling can be supported without using the DAI bit in the UL / DL grant. This means that the existing DCI format can be used in LTE-Advanced with channel aggregation (no additional DCI format is required). Furthermore, a complete uplink control solution can be realized without causing downlink control overhead with the DAI bit (since it can support ACK / NAK multiplexing without the need for the DAI bit).

  FIG. 13 illustrates an example method according to an embodiment. The method starts at 1300. At 1301, a device such as a UE performs frequency domain ACK / NAK bundling across component carriers of the reception bandwidth of the user equipment. At 1302, a bundled ACK / NAK value corresponding to at least one codeword is generated based on the executed ACK / NAK bundling. At 1303, information about the generated bundled ACK / NAK value and the number of detected downlink grants within the received bandwidth of the user equipment is included in the ACK / NAK resource transmitted on the uplink control channel. The method ends at 1304.

  It will be apparent to those skilled in the art that the concepts of the present invention can be implemented in a variety of ways as technology advances. The invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.

102 UE
104 eNB
106 MME
108 SAE GW
110 Internet

Claims (25)

A processor configured to perform frequency domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across component carriers within the received bandwidth of the user equipment;
A generator configured to generate a bundled ACK / NAK value corresponding to at least one codeword based on the performed ACK / NAK bundling;
Information about the generated bundled ACK / NAK value and the number of detected downlink grants within the reception bandwidth of the user equipment is included in the ACK / NAK resource transmitted on the uplink control channel. Processor,
A device comprising: Further comprising a processor configured to perform spatial domain bundling across two ACK / NAK bits corresponding to at least two spatial codewords;
The apparatus according to claim 1. DAI bit cannot be used in uplink / downlink grant,
The apparatus according to claim 1. The processor is configured to perform ACK / NAK bundling on a physical uplink shared channel by using N bits representing the N ² state;
The apparatus according to claim 1. The processor is configured to select an available state from a set of orthogonal states based on the generated bundled ACK / NAK value and the number of detected downlink grants; The state includes one or more of the states available by modulation arrangement, available by no transmission, and available by occupying multiple resources, and transmitted on the uplink control channel. The information is transmitted by selection of the orthogonal state,
The apparatus according to claim 1. Perform predetermined mapping to map one or two information bits to QPSK modulation symbols, and the state (s) corresponding to bundled ACKs across the odd number of downlink grants in the placement map, and the downlink Further comprising a processor configured to ensure that there is a maximum Euclidean distance between the state (s) corresponding to the bundled ACKs across the even number of grants;
The apparatus according to claim 5. The information transmitted on the uplink control channel includes one or more information bits, and the ACK / NAK resource is one of the ACK / NAK channels selected based on a predetermined downlink grant;
The apparatus according to claim 1. At least one downlink grant within the reception bandwidth of the user equipment includes more than one control channel element and more than one ACK / NAK channel;
The apparatus according to claim 1. Configured to perform the function of claim 1,
The user apparatus characterized by the above-mentioned. Receive information on the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource on the uplink control channel and the number of detected downlink grants within the user device's receive bandwidth An interface configured to
ACK / NAK / DTX (intermittent transmission) detection is performed based on the received information, and based on the ACK / NAK / DTX detection, whether the detected ACK / NAK state represents a correct ACK / NAK A processor configured to determine;
A device comprising: The processor is further configured to make a scheduling decision based on the detected ACK / NAK / DTX;
The apparatus according to claim 10. The processor is further configured to allocate resources to one or more component carriers based on the result of the ACK / NAK / DTX detection;
The apparatus according to claim 10. Performing frequency domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across component carriers within the reception bandwidth of the user equipment;
Generating a bundled ACK / NAK value corresponding to at least one codeword based on the performed ACK / NAK bundling;
Including information on the generated bundled ACK / NAK value and the number of detected downlink grants within the received bandwidth of the user equipment in an ACK / NAK resource transmitted on an uplink control channel;
A method comprising the steps of: Further comprising performing spatial domain bundling across two ACK / NAK bits corresponding to at least two spatial codewords;
The method according to claim 13. Further comprising selecting an available state from a set of orthogonal states based on the generated bundled ACK / NAK value and the number of detected downlink grants, wherein the available orthogonal state is modulated The information transmitted on the uplink control channel includes one or more of a state that can be used due to the arrangement of the state, a state that can be used when there is no transmission, and a state that can be used by occupying multiple resources. , Communicated by selection of orthogonal state,
The method according to claim 13. Further comprising performing a predetermined mapping to map the two information bits into at least four states, each defined as ACK or NAK over two spatial codewords and one or more downlink grants;
The method according to claim 15. If the bundled ACK / NACK value is NAK, the method further includes causing NAK and DTX to share the same state.
The method according to claim 15. One or two information bits are mapped to QPSK modulation symbols, and in the constellation map the state (s) corresponding to the bundled ACK over the odd number of downlink grants and the bundle over the even number of downlink grants Further comprising performing a predetermined mapping to ensure that there is a maximum Euclidean distance between the state (s) corresponding to the normalized ACK.
16. The method of claim 15, further comprising: Receive information on the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource on the uplink control channel and the number of detected downlink grants within the user device's receive bandwidth And steps to
Performing ACK / NAK / DTX (intermittent transmission) detection based on the received information;
Determining whether the detected ACK / NAK state represents a correct ACK / NAK based on the ACK / NAK / DTX detection;
A method comprising the steps of: Further comprising allocating resources to one or more component carriers based on the result of the ACK / NAK / DTX detection;
20. A method according to claim 19, wherein: An article of manufacture embodying computer-executable program instructions, including a computer-readable medium and operably coupled to a memory, wherein the program instructions are executed by the computer,
The ability to perform frequency domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across component carriers within the reception bandwidth of the user equipment;
A function of generating a bundled ACK / NAK value corresponding to at least one codeword based on the performed ACK / NAK bundling;
A function of including information about the generated bundled ACK / NAK value and the number of detected downlink grants within the reception bandwidth of the user equipment in an ACK / NAK resource transmitted on an uplink control channel;
Run the
Articles of manufacture characterized by that. The computer readable medium comprises at least one of a computer readable medium, a program storage medium, a recording medium, a computer readable memory, a computer readable software distribution package, a computer readable signal, a computer readable telecommunication signal, and a computer readable compressed software package. Including,
22. An article of manufacture as claimed in claim 21. Based on the generated bundled ACK / NAK value and the number of detected downlink grants, further performs a function of selecting an available state from a set of orthogonal states, wherein the available orthogonal state is: The information transmitted on the uplink control channel, including one or more of a state that can be used by arrangement of modulation, a state that can be used by absence of transmission, and a state that can be used by occupying multiple resources Is communicated by selection of the orthogonal state,
22. An article of manufacture as claimed in claim 21. Processing means for performing frequency domain acknowledgment / negative acknowledgment (ACK / NAK) bundling across component carriers within the reception bandwidth of the user equipment;
Generating means for generating a bundled ACK / NAK value corresponding to at least one codeword based on the executed ACK / NAK bundling;
Process for including information on the generated bundled ACK / NAK value and the number of detected downlink grants within the reception bandwidth of the user equipment in ACK / NAK resources transmitted on an uplink control channel Means,
A device comprising: Receive information on the generated bundled ACK / NAK value included in the Acknowledge / Negative Acknowledgment (ACK / NAK) resource on the uplink control channel and the number of detected downlink grants within the user device's receive bandwidth Receiving means for
Processing means for performing ACK / NAK / DTX (intermittent transmission) detection based on the received information;
Processing means for determining whether the detected ACK / NAK status represents a correct ACK / NAK based on the ACK / NAK / DTX detection;
A device comprising:

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