TW201731231A - Robustness enhancements of efficient HARQ feedback - Google Patents

Abstract

Systems and methods are disclosed for providing efficient downlink Hybrid Automatic Request (HARQ) feedback. In some embodiments, a method of operation of a wireless device in a cellular communications system comprises receiving a downlink control information message comprising a HARQ feedback buffer index and storing a downlink HARQ feedback flag in a position within a HARQ feedback buffer that corresponds to the HARQ feedback buffer index. In this manner, multiple downlink HARQ feedback flags can be stored in the HARQ feedback buffer and subsequently transmitted to a network node in an efficient manner.

Description

Enhanced reliability of efficient hybrid automatic repeat request (HARQ) feedback

The present invention relates to downlink hybrid automatic repeat request (HARQ) feedback in a cellular communication network.

The Advanced Antenna System (AAS) is one of the areas in which technology has progressed significantly in recent years and one of the areas of rapid technological development in the next few years is foreseen. Therefore, it is assumed that AAS and, in particular, a large number of multiple-input multiple-output (MIMO) transmissions and receptions will be one of the cornerstones of a future fifth-generation (5G) cellular communication system. Beamforming has become increasingly popular and capable, and therefore not only beamforming is used for the transmission of data but also for the transmission of control information. This is referred to as an incentive to enhance the (relative) new control channel in Long Term Evolution (LTE) of the Entity Downlink Control Channel (ePDCCH). When beamforming is used to control the channel, the cost of transmitting additional item control information can be reduced due to the increased link budget provided by the additional antenna gain. This is also a good property that 5G expects, and may be even greater than one of the current LTE standards. For today's downlink Hybrid Automatic Repeat Request (HARQ) transmission in LTE, depending on whether the User Equipment Equipment (UE) schedules uplink PUSCH transmission, on the Physical Uplink Control Channel (PUCCH) or The HARQ feedback is sent from the UE to the network on the Physical Uplink Shared Channel (PUSCH). Subsequently, the network can derive whether the last HARQ reception for the procedure is successful (ACK/NACK) or even downlink assignment reception on a basis of a different HARQ procedure (discontinuous transmission (DTX)) ) Conclusion. The timing of the transmitted HARQ feedback in LTE is such that for frequency division duplexing (FDD), feedback from a HARQ receiving procedure is received in the subframe n+4 in the uplink, provided that the HARQ reception is for the HARQ reception The corresponding downlink transmission of the procedure is in subframe n. Therefore, the delay between the downlink transmission and the corresponding HARQ feedback is a total of 4 milliseconds (ms). For Time Division Duplex (TDD), the delay from downlink data transmission to uplink feedback reception can be greater than 4 ms (or equivalently 4 subframes) to accommodate half-duplex downlink-uplink Separation. For 5G, the HARQ feedback is transmitted on the xPUCCH as part of the Uplink Control Information (UCI). As used herein, "xPUCCH" is used to refer to a physical uplink control channel in a next generation cellular communication network (e.g., 5G). The uplink control channel (xPUCCH) can be transmitted on one orthogonal frequency division multiplexing (OFDM) symbol. This channel will provide a limited number of bits (ie, for example, 1 to 4 information bits) by either: having several fixed formats (similar to LTE PUCCH format 1/1a/1b) or having a single The format still allows for a flexible number of information bits. With regard to the use of a single format for a flexible number of information bits, it may be possible to use less useful information bits to improve performance, since this allows unused information bits to be used as a short training sequence. Furthermore, it is assumed that there will be an implicit mapping from the Downlink Control Information (DCI) Control Channel Element (CCE) to the UCI CCE (similar to for LTE). The existing HARQ technology is not 100% reliable, inflexible and consumes a lot of resources. Thus, there is a need for improved HARQ technology, particularly for HARQ technology in next generation cellular communication networks such as, for example, a 5G cellular communication network.

Systems and methods for providing efficient downlink hybrid automatic request (HARQ) feedback are disclosed. In some embodiments, a method of operating a wireless device in a cellular communication system includes receiving a downlink control information (DCI) message including a HARQ feedback buffer index and returning a downlink HARQ back The flag is stored in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. In this manner, multiple downlink HARQ feedback flags can be stored in the HARQ feedback buffer and then transmitted to a network node in an efficient manner. In some embodiments, the HARQ feedback solution is reliable for control channel errors in the downlink as well as in the uplink. Moreover, in some embodiments, the HARQ feedback solution ensures that costly errors are mitigated at the expense of some additional HARQ retransmissions. Still further, in some embodiments, the HARQ feedback solution interprets the lack of HARQ feedback as quickly as possible, thus providing the shortest possible HARQ round trip time (RTT). In some embodiments, the method further includes receiving one or more additional DCI messages including respective HARQ feedback buffer indices. The method further includes storing, for each additional DCI message of the one or more additional DCI messages, a respective downlink HARQ feedback flag in the HARQ feedback buffer corresponding to the HARQ included in the respective DCI message The feedback buffer is indexed in one of the locations. In some embodiments, the method further includes receiving a polling request from a network node and transmitting a downlink HARQ feedback to the network node after receiving the polling request. The downlink HARQ feedback is based on the downlink HARQ feedback flags stored in the HARQ feedback buffer. In some embodiments, the method further includes generating an uplink control message including one of the information indicative of the downlink HARQ feedback flags stored in the downlink HARQ feedback buffer. Transmitting the downlink HARQ feedback includes transmitting the uplink control message. Moreover, in some embodiments, generating the uplink control message includes jointly encoding the downlink HARQ feedback flags as one of the code words for the uplink control message. In other embodiments, generating the uplink control message includes mapping each downlink HARQ feedback flag in the HARQ feedback buffer to a respective one of an uplink control channel. In some embodiments, transmitting the downlink HARQ feedback includes transmitting the downlink HARQ feedback in a subframe T+K, wherein the subframe T is the subframe in which the polling request is received And K is a HARQ timing offset. In some embodiments, receiving the polling request includes receiving a DCI in the subframe T, wherein the DCI includes the polling request and one of the HARQ timing offsets K. In some embodiments, the indication of the HARQ timing offset K is one of the values of the HARQ timing offset K. In other embodiments, the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, where N is a predefined value. In other embodiments, the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, where N is a pre-configured value. In other embodiments, the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, where N is one of the predetermined minimum HARQ timing offsets for the wireless device. In other embodiments, the indication of the HARQ timing offset K is a value X, wherein the HARQ timing offset K is based on the value X. In some embodiments, each of the downlink HARQ feedback flags in the HARQ feedback buffer includes a first bit sequence representing an acknowledgement (ACK) and one of a negative acknowledgement (NACK). A bit sequence and one of a plurality of code points in a code space representing one of the third bit sequences of a DCI failure. In some embodiments, storing the downlink HARQ feedback flag includes storing an indication of an ACK in the HARQ feedback buffer corresponding to the HARQ back if the wireless device successfully receives the corresponding downlink data. In the location of the buffer index, and if the wireless device does not successfully receive the corresponding downlink data, storing one of the NACK indications in the HARQ feedback buffer corresponding to the HARQ feedback buffer index In the location. In addition, in some embodiments, before storing the downlink HARQ feedback flag, a preset value is stored in the location in the HARQ feedback buffer, where the preset value is a DCI error. An indication. In some other embodiments, before storing the downlink HARQ feedback flag, a preset value is stored in the location in the HARQ feedback buffer, wherein the preset value is one of a NACK indication. . In some embodiments, storing the downlink HARQ feedback flag includes determining whether the receipt of data for a current subframe is successful, wherein the current subframe is the subframe in which the DCI message is received. Storing the downlink HARQ feedback flag further includes determining whether a NACK flag is stored at the location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. The storing the downlink HARQ feedback flag further includes determining that the receiving of the data for the current subframe is successful and determining that a NACK flag is stored in the HARQ feedback buffer corresponding to the HARQ feedback buffer index After the location, even if the reception of the data for the current subframe is successful, a NACK flag is maintained at the location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. In addition, in some embodiments, storing the downlink HARQ feedback flag further includes determining that the receiving of the data for the current subframe is successful and determining that a NACK flag is not stored in the HARQ feedback buffer. After the location of the HARQ feedback buffer index, an ACK flag is stored at the location corresponding to the HARQ feedback buffer index in the HARQ feedback buffer. In some embodiments, storing the downlink HARQ feedback flag further includes, after determining that the reception of the data for the current subframe is unsuccessful, corresponding to the HARQ feedback buffer in the HARQ feedback buffer A NACK flag is stored at this location of the index. In some embodiments, the method further comprises determining whether a DCI error occurs in one or more of the previous subframes, the one or more previous subframes being one or more of the sub-messages prior to the current subframe frame. The method further includes, after determining that a DCI error occurs in the one or more previous subframes, storing one or more flags indicating one or more DCI errors in the HARQ feedback buffer corresponding to immediately following One or more locations of one or more HARQ feedback buffer indices before the HARQ feedback buffer index included in the DCI message. An embodiment of a wireless device for a cellular communication system is also disclosed. In some embodiments, a wireless device is adapted to: receive a DCI message including a HARQ feedback buffer index and store a downlink HARQ feedback flag in a HARQ feedback buffer corresponding to the HARQ The feedback buffer is indexed in one of the locations. Moreover, in some embodiments, the wireless device is further adapted to operate in accordance with a method of operation of a wireless device in accordance with any of the embodiments described herein. In some embodiments, a wireless device for a cellular communication system includes a transceiver, at least one processor, and memory for storing instructions, the instructions being executable by the at least one processor, whereby the wireless device can Operation to receive, via the transceiver, a DCI message including a HARQ feedback buffer index and store a downlink HARQ feedback flag in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices In the location. In some embodiments, by the at least one processor executing the instructions, the wireless device is further operative to receive, via the transceiver, one or more additional DCI messages including respective HARQ feedback buffer indices, and for Each additional DCI message of one or more additional DCI messages, storing a respective downlink HARQ feedback flag in the HARQ feedback buffer corresponding to the HARQ feedback buffer index included in the respective DCI message In a position. In some embodiments, by the at least one processor executing the instructions, the wireless device is further operative to receive a polling request from a network node via the transceiver and receive the polling via the transceiver The HARQ feedback is transmitted to a network node after the request, wherein the HARQ feedback is based on the downlink HARQ feedback flags stored in the HARQ feedback buffer. In some embodiments, to store the downlink HARQ feedback flag, the wireless device is further operable to: determine whether the reception of data for a current subframe is successful, wherein the current subframe is receiving the The subframe of the DCI message; determining whether a NACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index; and determining the receipt of the data for the current subframe After successfully determining that a NACK flag is stored in the HARQ feedback buffer corresponding to the location of the HARQ feedback buffer index, even if the reception of the data for the current subframe is successful, a NACK flag will be The flag is maintained at the location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. In some embodiments, to store the downlink HARQ feedback flag, the wireless device is further operative to determine that the receipt of the data for the current subframe is successful and to determine that a NACK flag is not stored in the HARQ back After the location of the buffer corresponding to the HARQ feedback buffer index, an ACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index. In some embodiments, to store the downlink HARQ feedback flag, the wireless device is further operative to store a NACK flag in the HARQ after determining that the reception of the data for the current subframe is unsuccessful. The feedback buffer corresponds to the location of the HARQ feedback buffer index. In some embodiments, by executing the instructions by the at least one processor, the wireless device is further operative to: determine whether a DCI error occurs in one or more previous subframes, the one or more previous pairs The frame is in one or more subframes before the current subframe; and after determining a DCI error in the one or more previous subframes, one or more DCI errors are indicated. The flags are stored in the HARQ feedback buffer at one or more locations corresponding to one or more of the HARQ feedback buffer indices immediately preceding the HARQ feedback buffer index included in the DCI message. In some embodiments, a wireless device enabled to operate in a cellular communication system includes means for receiving a DCI message including a HARQ feedback buffer index and for returning a downlink HARQ feedback The flag is stored in a HARQ feedback buffer corresponding to a component in one of the HARQ feedback buffer indices. In some embodiments, a wireless device enabled to operate in a cellular communication system includes: a receiving module operative to receive a DCI message including a HARQ feedback buffer index; and a storage module A group operable to store a downlink HARQ feedback flag in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. An embodiment of a method of operating a network node of a cellular communication system is also disclosed. In some embodiments, a method of operating a network node includes determining whether to schedule a wireless device in a subframe. The method further includes, after determining that the wireless device is scheduled in the subframe, causing a HARQ program transmitted to the wireless device in the subframe to be associated with a buffer index. The method further includes including the buffer index in a DCI transmitted to the wireless device in the subframe. In some embodiments, the method further includes setting the buffer index (BI) to an initial value prior to determining whether to schedule the wireless device in the subframe. In some embodiments, the method further includes determining if the BI is equal to a predefined maximum. The method further includes incrementing the BI after determining that the BI is not equal to the predefined maximum. The method further includes, after determining that the BI is equal to the predefined maximum value, setting a polling flag in the DCI transmitted to the wireless device in the subframe. Moreover, in some embodiments, the method further comprises receiving a downlink HARQ feedback from the wireless device in response to setting the polling flag in the DCI transmitted to the wireless device in the subframe. In some embodiments, the method further comprises determining whether a signal-to-interference plus noise ratio (SINR) of one of the uplink control channels on which the downlink HARQ feedback is received is greater than or equal to a first predefined Threshold. The method further includes determining that the downlink HARQ feedback should be trusted and processing the downlink HARQ feedback if the SINR of the uplink control channel is greater than or equal to the first predefined threshold. In some embodiments, the method further comprises determining whether the SINR of the uplink control channel is less than the first predefined threshold but greater than or equal to a second predefined threshold. The method further includes determining that the downlink HARQ feedback should not be trusted if the SINR of the uplink control channel is less than the first predefined threshold but greater than or equal to the second predefined threshold The downlink HARQ feedback is set to all NACKs and the NACKs are processed. An embodiment of a network node for a cellular communication system is also disclosed. In some embodiments, a network node is adapted to determine whether to schedule a wireless device in a secondary frame. The network node is further adapted to associate a HARQ program transmitted to the wireless device in the secondary frame with a BI after determining to schedule the wireless device in the secondary frame. The wireless device is further adapted to include the BI in a DCI transmitted to the wireless device in the subframe. In some embodiments, the network node is further adapted to operate in accordance with an operational method of a network node in accordance with any of the embodiments described herein. In some embodiments, a network node for a cellular communication system includes at least one processor and memory for storing instructions, the instructions being executable by the at least one processor, whereby the network node is operable to Determining whether to schedule a wireless device in a subframe; after determining to schedule the wireless device in the subframe, causing the HARQ program to be transmitted to the wireless device in the subframe BI is associated; and the BI is included in the DCI transmitted to the wireless device in the subframe. In some embodiments, the network node is further operative to set the BI to one before deciding whether to schedule the wireless device in the subframe by executing the instructions by the at least one processor. Initial value. In some embodiments, the network node is further operable to determine whether the BI is equal to a predefined maximum value by executing the instructions by the at least one processor; determining that the BI is not equal to the predefined maximum value Thereafter, the BI is incremented; and after determining that the BI is equal to the predefined maximum value, a polling flag is set in the DCI transmitted to the wireless device in the subframe. In some embodiments, the network node is further operable to set a polling flag in the DCI transmitted to the wireless device in the subframe by executing the instructions by the at least one processor. A downlink HARQ feedback is received from the wireless device. In some embodiments, via the at least one processor executing the instructions, the network node is further operable to: determine one of the uplink control channels on which the downlink HARQ feedback is received, SINR Whether it is greater than or equal to a first predefined threshold, and if the SINR of the uplink control channel is greater than or equal to the first predefined threshold, determining that the downlink HARQ feedback should be trusted and processing the Downlink HARQ feedback. Moreover, in some embodiments, the network node is further operable to determine whether the SINR of the uplink control channel is less than the first predefined threshold by executing the instructions by the at least one processor But greater than or equal to a second predefined threshold, and if the SINR of the uplink control channel is less than the first predefined threshold but greater than or equal to the second predefined threshold, then the decision should not The downlink HARQ feedback is trusted, the downlink HARQ feedback is set to all NACKs, and the NACKs are processed. In some embodiments, a network node enabled to operate in a cellular communication system includes: means for determining whether to schedule a wireless device in a secondary frame; for determining at the secondary After the frame is scheduled for the wireless device, the HARQ program transmitted to the wireless device in the subframe is associated with a BI; and is used for transmission to the wireless device in the subframe The components of the BI are included in the DCI. In some embodiments, a network node enabled to operate in a cellular communication system includes: a decision module operable to determine whether to schedule a wireless device in a subframe; an association a module operable to cause a HARQ program transmitted to the wireless device in the subframe to be associated with a BI after the determining module determines to schedule the wireless device in the subframe; and A transmission module operable to include the BI in a DCI transmitted to the wireless device in the subframe. Those skilled in the art will understand the scope of the present invention and recognize additional aspects thereof after reading the following detailed description of the embodiments of the invention.

Related application The present application claims the benefit of the Provisional Patent Application No. 62/293, 148, filed on Feb. 9, 2016, and the Provisional Patent Application No. 62/295,722, filed on Feb. 16, 2016. The manner of reference is incorporated herein. The embodiments set forth below represent information that enables those skilled in the art to practice the embodiments and the best mode of the embodiments. Those skilled in the art will understand the concept of the present invention and will appreciate the application of such concepts not specifically discussed herein. It should be understood that these concepts and applications fall within the scope of the invention and the scope of the appended claims. Radio Node: As used herein, a "radio node" is a radio access node or a wireless device. Radio Access Node: As used herein, a "radio access node" is any node in a radio access network operating in one of the cellular communication networks that wirelessly transmits and/or receives signals. Some examples of a radio access node include, but are not limited to: a base station, such as, for example, one of a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) network, enhanced or evolved Node B (eNB) a high power or large base station; a low power base station such as, for example, a small base station, a micro base station, a home eNB or the like; and a relay node. Wireless device: As used herein, a "wireless device" accesses a cellular communication network by wirelessly transmitting and/or receiving signals to and from one (several) of the radio access nodes (ie, by a cellular communication) Any type of device for network servoing. Some examples of a wireless device include, but are not limited to, a User Equipment Device (UE) and a Machine Type Communication (MTC) device in a 3GPP LTE network. Network Node: As used herein, a "network node" is any node that is part of a cellular access network/system radio access network or core network. It should be noted that the description given herein focuses on a 3GPP cellular communication system and thus, generally uses 3GPP LTE terminology or terms similar to 3GPP LTE terminology. However, the concepts disclosed herein are not limited to a 3GPP system. It should be noted that in the description herein, the term "cell" may be mentioned, however, especially with respect to the fifth generation (5G) concept, a beam may be used instead of a cell and thus, important systems should note that the concepts described herein It can be equally applied to both the cell and the beam. Prior to discussing embodiments of the present invention, one of the issues associated with existing hybrid automatic repeat request (HARQ) solutions is discussed. The current HARQ protocol for LTE is not 100% reliable, so LTE also uses higher layer Radio Link Control (RLC) Answer Mode (AM) to ensure reliability. Also, current HARQ protocols are based on a number of strict timing relationships, such as, for example, per-synchronous HARQ timing operations, which are very inflexible and cause several, for example, when using dynamic time division duplex (TDD) operations that are expected to be very common for 5G. problem. Furthermore, it is expected that the HARQ feedback protocol for 5G is very fast and especially far faster than both LTE, but the x-physical uplink control channel (xPUCCH) resources are still not overused. Therefore, what is desired is a HARQ feedback mechanism that can adapt the xPUCCH resource consumption in feedback latency in a fairly dynamic manner depending on, for example, the reliability and/or latency requirements of the user plane data service. The present invention provides systems and methods related to uplink HARQ feedback that is particularly suitable for, but not limited to, next generation cellular communication networks (e.g., 5G networks). In some embodiments, the feedback flag from several downlink HARQ transmissions is bundled into a single HARQ feedback transmission. In some embodiments, the network uses Downlink Control Information (DCI) to indicate which feedback flags the UE should combine into a HARQ feedback transmission and when and how it should be transmitted. The present invention proposes a fast and efficient downlink HARQ feedback mechanism for, for example, 5G x PUCCH. In some embodiments, the mechanism allows for a variable number of HARQ feedback flags (ACK/NACK) to be included in one HARQ feedback transmission. Two different variations are presented: Ÿ Direct scheduling, where each DCI will directly schedule an uplink of ACK/NACK on the xPUCCH. By polling, the received result reported after the request by the network is stored in a feedback buffer. The reception result is, for example, an ACK, a NACK or, in some embodiments, a discontinuous transmission (DTX). Two variations further allow DTX detection, ie, when DCI is not heard, as discussed below. Embodiments of the present invention provide a fast and efficient downlink HARQ feedback mechanism for, for example, 5G x PUCCH. It regulates the amount of xPUCCH resources used by each UE, allowing for a very fast feedback. Moreover, embodiments of the downlink HARQ feedback mechanism disclosed herein may be fully scheduled by the network such that resource consumption may be dynamically adapted to feedback delays depending on user plane service requirements. Embodiments of the downlink HARQ feedback mechanism disclosed herein allow for DTX detection. Embodiments of the invention are implemented in a cellular communication system or network. One non-limiting example of a cellular communication system 10 is illustrated in FIG. As illustrated, cellular communication system 10 includes a radio access network (RAN) 12 that includes a number of radio access nodes as base station 14 in the illustrated example. Base station 14 is sometimes referred to more generally herein as radio access node 14. In 3GPP, base station 14 can be, for example, an eNB or a low power base station (e.g., a mini, small, subminiature, or home base station). The base station 14 provides radio access to wireless devices 18 (such as, for example, UEs) in the corresponding cells 16 of the base station 14. It should be noted that although cell 16 is shown in the example of FIG. 1, in other embodiments, base station 14 can transmit over multiple beams. In this example, base station 14 communicates via an X2 connection or, more generally, a base station to base station connection. In addition, base station 14 is coupled to a core network 20 that includes various core network nodes, such as, for example, one or more mobility management entities (MMEs) 22, one or more servo gateways. (S-GW) 24 and one or more packet data network gateways (P-GW) 26.Direct scheduling HARQ Feedback In some embodiments, each DCI is directed to a feedback schedule to be transmitted at a subsequent time, in view of the inclusion of the subframe offset K. Next, one of the scheduled DCIs at the sub-frame T will present a feedback at the sub-frame T+K. In some related embodiments, the configuration of K may be provided, for example, in part by, for example, via one of a higher level communication transmission lookup table and/or hard coded in the specification. For example, assuming the smallest possible K-series N (which is the response time of the wireless device 18), instead of transmitting K=N, K=N+1, K=N+2, etc., the network may alternatively be in the DCI. The communication S = 0, S = 1, S = 2, etc. and then separately signals the value N, after which the wireless device 18 calculates K as K = S + N. It should be noted that, in at least some embodiments, the value of N can only be communicated once, for example, by higher layer messaging or can be one of the properties of the wireless device 18, the network has been, for example, from a previously executed RRC connection procedure. Understand this nature. The value of S can be changed. For example, the value of S can be varied by including the value of S in each respective DCI message, wherein the value of S can vary from one DCI message to another DCI message. 2 illustrates the operation of one of the wireless devices 18 and a radio access node 14 or other network node in accordance with, for example, the above embodiments. As illustrated, the radio access node 14 or some other network node optionally configures, at least in part, an offset K to be used to determine that the wireless device 18 transmits the HARQ feedback after receiving a DCI message. Time (T+K) (step 100). Again, the T-system subframe or more generally the time at which the DCI message is received, and the T+K subframe or more generally the time at which the HARQ feedback is transmitted. Therefore, T is sometimes referred to herein as the current subframe, and K is referred to herein as HARQ timing offset K or simply offset K. As stated above, this configuration of the offset K can include, for example, a communication to be used by the wireless device 18 to, for example, look up a lookup table from one of the values of one of the indexed decisions K in a corresponding DCI message. As a further example of the above discussion, this configuration may be configured for, for example, configured according to one of K = N + S decision offset K one of the values S, where S is included in the corresponding DCI message and the N system A predetermined value (such as, for example, a predetermined reaction time of one of the wireless devices 18). At some point, the wireless device 18 receives a DCI message from the cordless access node 14, wherein the DCI message includes an indication of the offset K (step 102). The indication of offset K may be a value of K or, for example, may be used by wireless device 18 to determine a value of K (i.e., K may convey a value X according to the indication). For example, the indication of the offset K can be a value S, where the offset K = N + S, where N can be predefined, for example, by standard or configured by the network (eg, in the configuration of step 100) provide). In some embodiments, the wireless device 18 receives a single DCI message and causes a HARQ feedback containing a single HARQ flag to be transmitted in step 106 below. However, in other embodiments, the wireless device 18 receives a plurality of DCI messages including the DCI message of step 102 and potentially additional DCI messages in the previous subframe. Thus, if there are multiple DCI messages, then these DCI messages may have respective HARQ timing offsets K that result in respective HARQ feedbacks transmitted in the same subframe. Thus, in some embodiments, the wireless device 18 combines multiple HARQ feedback flags to provide HARQ feedback to be transmitted by the wireless device at the subframe T+K (step 104). However, it should be noted that step 104 is optional. As discussed below, the manner in which the wireless device 18 combines multiple feedback flags may vary depending on the particular embodiment/embodiment. For example, the wireless device 18 may concatenate the bit patterns representing the plurality of HARQ feedback flags or jointly encode the plurality of HARQ feedback flags into a single code word. As an illustrative alternative to a combined HARQ feedback flag, wireless device 18 may transmit a HARQ feedback flag in a separate uplink control information (UCI) message. The wireless device 18 transmits a downlink HARQ feedback at the subframe T+K (step 106). As described herein, in some embodiments, the HARQ feedback is directed to one of the downlink HARQ flags for one of the single downlink data transmissions scheduled in the subframe T by the DCI message. In this case, if the downlink data under the DCI message schedule is successfully received by the wireless device 18 in the subframe T, the downlink HARQ flag is an ACK or if the downlink is scheduled by the DCI message. The data is not successfully received by the wireless device 18 in the subframe T, and the downlink HARQ flag is a NACK. In some other embodiments, HARQ feedback includes downlink HARQ feedback for multiple downlink transmissions. For example, multiple downlink transmissions may be in the subframe T₁ , T₂ ,...,T_M The respective DCI message schedules received, in which the respective HARQ timing offsets K₁ , K₂ ,...,K_M So that HARQ feedback for all such downlink transmissions occurs in the same subframe (ie, T₁ +K₁ =T₂ +K₂ =...=T_M +K_M ). The HARQ feedback may then include, for example, a plurality of downlink HARQ flags mapped to separate physical resources (eg, resource elements (REs)) in the xPUCCH (eg, in a separate UCI message). Alternatively, HARQ feedback may include a plurality of downlink HARQ flags represented by the joint provided by step 104 (ie, as a result of jointly encoding multiple downlink HARQ flags into a single codeword or concatenated to represent multiple One of the results of the multiple bit patterns of the HARQ flag) is a single combined feedback. In some embodiments, the downlink HARQ flag includes ACK and NACK depending on whether the wireless device 18 successfully receives the respective downlink data transmission (eg, data transmission on the Physical Downlink Shared Channel (PDSCH)). Additionally, in some embodiments, if the respective DCI message is not successfully received by the wireless device 18, the downlink HARQ flag includes DTX (i.e., a flag indicating that the DCI received one of the errors or failures). The radio access node 14 receives the HARQ feedback and processes the HARQ feedback in accordance with any desired HARQ feedback processing scheme (step 108). For example, if a NACK is received, the radio access node 14 retransmits the downlink data. In some embodiments, the radio access node 14 is capable of detecting DCI errors or failures based on HARQ feedback. This is referred to herein as DTX or a DCI failure/error. In some embodiments, DTX detection (ie, a DCI failure) can be achieved by: Ÿ having each received DCI to xPUCCH a group of given entity resources/RE different (clear) Mapping. In other words, different resources are used but several separate UCI messages are sent simultaneously. If the network does not receive any message at a particular resource/resource element, then this can be interpreted as the wireless device 18 failing to decode the corresponding DCI.明确 The DTX is explicitly coded as one of the individual code points in the feedback, for example, so that 00=ACK, 01=DTX, 11=NACK, . Ÿ Jointly encode multiple HARQ feedbacks. In this case, when the wireless device 18 is ready for xPUCCH transmission, the wireless device 18 combines the feedback flags to be transmitted into a single code point that is mapped to transmit one of the codewords on the xPUCCH. For example, if up to four feedback flags can be included in a HARQ feedback transmission, the code point can be calculated as f₁ +3f₂ +9f₃ +27f₄ , where f1...f4 are coded as feedback flags of ACK=1, NACK=2, and DTX=0. DTX means that no transmission is detected for this flag. It should be noted that multiple HARQ feedbacks may be combined in a similar manner without joint coding, for example, each feedback is sent by a number of bits in a HARQ transmission (eg, as in the example of the previous bullet point) One bit). An illustration of one of the procedures of Figure 2 is shown in Figures 3A and 3B. In the first example illustrated in FIG. 3A, both the DCI message and the downlink data are successfully decoded for the subframes T, T+1, T+2, and T+3, and transmitted in the subframe P, respectively. It is a HARQ feedback flag of ACK, ACK, ACK and ACK. The four feedback flags may be jointly encoded or otherwise combined into a single feedback/bit pattern or may be transmitted in separate entity resources (eg, in separate UCI messages). In the second example illustrated in FIG. 3A, the DCI messages for the subframes T, T+1, T+2, and T+3 are successfully decoded, and the decoding is successfully performed for the subframes T, T+2, and T+3. The downlink data is not successfully decoded for the downlink data of the sub-frame T+1 (ie, there is a PDSCH error). The appropriate HARQ feedback flag (ACK, NACK, ACK, ACK) is transmitted by the wireless device 18 in the subframe P. Again, the four feedback flags can be jointly encoded or otherwise combined into a single feedback/bit pattern or can be transmitted in a separate entity resource (eg, in a separate UCI message). In the third example illustrated in FIG. 3B, the DCI messages for the subframes T, T+2, and T+3 are successfully decoded, and the DCI message for the subframe T+1 is not successfully decoded (ie, the secondary message There is a DCI error in block T+1), and the downlink data for the sub-frames T, T+2 and T+3 is successfully decoded. The appropriate HARQ feedback flag (ACK, DTX, ACK, ACK) is transmitted by the wireless device 18 in the subframe P. Again, the four feedback flags can be jointly encoded or otherwise combined into a single feedback/bit pattern or can be transmitted in a separate entity resource (eg, in a separate UCI message). Finally, in the fourth example illustrated in FIG. 3B, the case is the same as in Example 1, except that the wireless device 18 is not scheduled in the subframe T+1. In this example, the appropriate HARQ feedback flag (ACK, DTX, ACK, ACK) is transmitted by the UE in the subframe P. Again, the four flags may be jointly encoded or otherwise combined into a single feedback/bit pattern or may be transmitted in a separate entity resource (eg, in a separate UCI message).By polling HARQ Feedback In some embodiments, each DCI message contains an index to one of the HARQ feedback buffers in which the reception status of the index reception (ACK (A) / NACK (N) or at least some implementations is stored. In the example, DTX or DCI error (D)). In some related embodiments, the network will explicitly poll the status report of the HARQ feedback buffer, which will also clear the state of the HARQ feedback buffer. Assuming that one of the HARQ feedback delays of the wireless device 18 is d subframes, one of the polls received at the subframe T will present a feedback at the subframe T+d. In some embodiments, the HARQ feedback delay d can be a static delay (eg, four subframes). In other embodiments, the HARQ feedback delay d can be a configurable delay. In particular, in some embodiments, the polling mentioned above may also contain explicit details as to when to transmit feedback in a manner similar to the configuration description for the HARQ timing offset K described above. That is, in some embodiments, d = K, where K is the HARQ timing offset K described above. In some further related embodiments, DTX detection (ie, a DCI failure) can be achieved by: Ÿ having each HARQ feedback buffer item to one of a given set of physical resource/resource elements Different mapping. If the network does not receive any message at a particular resource/resource element, then this can be interpreted as the wireless device 18 failing to decode the corresponding DCI.明确 The DTX is explicitly coded as one of the individual code points in the feedback. o Example 1: 00=ACK, 01=DTX, 11=NACK... ○ Example 2: Joint coding of all blocks. DTX only needs to be included in the first three projects, because if DTX is on the last project, no report will be sent. Therefore, this would require 3*3*3*2=54 code points, which can be encoded, for example, by an appropriate block code of at least 6 bits (ie, 2^6=64>54) . An example of the polling procedure described above is illustrated in FIG. As shown, in a subframe T₁ In the downlink control channel (herein referred to as the x-sub-subordinate control channel (xPDCCH)), a radio access node 14 transmits a first DCI message and the wireless device 18 receives the first DCI message (step 200). The first DCI message contains an indication in the subframe T₁ The downlink data is transmitted to one of the wireless devices 18 for downlink grant. Additionally, the first DCI message includes an index into one of the HARQ feedback buffers to store one of the respective downlink HARQ flags (eg, ACK, NACK, or DTX). The radio access node 14 also includes the downlink grant in the subframe 12 according to the first DCI message.₁ The first downlink data is transmitted to the wireless device 18 (step 202). The wireless device 18 stores a downlink HARQ flag (also referred to herein as a reception state) at a location defined by the index contained in the first DCI message in the HARQ feedback buffer (step 204). In some embodiments, if in the subframe T₁ If the wireless device 18 successfully receives/decodes the downlink data, it stores an ACK of the downlink HARQ flag or if it is in the subframe T.₁ If the medium wireless device 18 does not successfully receive/decode the downlink data, then the downlink HARQ flag is stored as a NACK. However, in some embodiments, this storage scheme can be modified as described below. In some embodiments, the HARQ feedback buffer is initialized to DTX at all locations. Thus, if the wireless device 18 fails to receive the first DCI message, then a DTX flag is maintained in its respective location in the HARQ feedback buffer. In the same way, in a subframe T₂ In the downlink control channel (herein referred to as xPDCCH), the radio access node 14 transmits a second DCI message and the wireless device 18 receives the second DCI message (step 206). The second DCI message contains an indication in the subframe T₂ The downlink data is transmitted to one of the wireless devices 18 for downlink grant. Additionally, the second DCI message includes an index into one of the locations of the HARQ feedback buffer to be stored for a respective downlink HARQ flag (eg, ACK, NACK, or DTX). The radio access node 14 also includes the downlink grant in the secondary frame T according to the second DCI message.₂ The second downlink data is transmitted to the wireless device 18 (step 208). The wireless device 18 stores the downlink HARQ flag (also referred to herein as a reception state) in the HARQ feedback buffer at the location defined by the index contained in the second DCI message (step 210). In some embodiments, if the wireless device 18 is in the subframe T₂ If the downlink data is successfully received/decoded, the downlink HARQ flag is stored as an ACK or if the wireless device 18 is not in the subframe T₂ If the downlink data is successfully received/decoded, the downlink HARQ flag is stored as a NACK. However, in some embodiments, this storage scheme can be modified as described below. In some embodiments, the HARQ feedback buffer is initialized to DTX at all locations. Thus, if the wireless device 18 fails to receive the second DCI message, then a DTX flag is maintained in its respective location in the HARQ feedback buffer. The program continues in this manner until the radio access node 14 is in the subframe T_M Medium transmission and wireless device 18 in subframe T_M A DCI message containing one of the polling indicators is received (step 212). In this example, the DCI message also includes a subframe T._M One of the downlink grants and one of the HARQ buffer indices for the corresponding downlink HARQ flag. Thus, the radio access node 14 is based on the sub-frame T_M The DCI message transmitted in the middle contains the downlink authorization in the subframe T_M The downlink data is transmitted to the wireless device 18 (step 214). The wireless device 18 stores the downlink HARQ flag (also referred to herein as a reception state) in the HARQ feedback buffer by the subframe T._M The location of the index definition included in the transmitted DCI message (step 216). In some embodiments, if the wireless device 18 is in the subframe T_M If the downlink data is successfully received/decoded, the downlink HARQ flag is stored as an ACK or if the wireless device 18 is not in the subframe T_M If the downlink data is successfully received/decoded, the downlink HARQ flag is stored as a NACK. However, in some embodiments, this storage scheme can be modified as described below. In some embodiments, the HARQ feedback buffer is initialized to DTX at all locations. Thus, if the wireless device 18 fails to be in the subframe T_M In the case of receiving the DCI message, a DTX flag is maintained in the respective positions in the HARQ feedback buffer. After receiving the polling indicator, the wireless device 18 transmits, for example, a HARQ feedback indicating the HARQ feedback flag stored in the HARQ feedback buffer on the xPUCCH (step 218). In the sub-frame T_M The HARQ feedback is transmitted in +d, where the delay d can be a static delay or a configurable delay, for example, in some embodiments a configurable HARQ timing offset K. In some embodiments, multiple HARQ feedback flags in the HARQ feedback buffer may be transmitted in separate physical resources (eg, in separate UCI messages). In other embodiments, multiple HARQ feedback flags are combined to provide a combined HARQ feedback for transmission. The combined HARQ feedback may be one of a series of bit patterns representing a plurality of HARQ flags. For example, if the HARQ flag is ACK=00 and NACK=01 and there are four locations in the HARQ feedback buffer, the combined HARQ feedback may be 00000001. As another example, the combined HARQ feedback may be derived from jointly coding one of a plurality of HARQ flags. The radio access node 14 detects the HARQ feedback (step 220) and interprets the HARQ feedback (222). Once the HARQ feedback is detected and interpreted, the radio access node 14 takes one (several) appropriate action (e.g., retransmits the data). An illustration of one such procedure is shown in Figures 5A and 5B, one of which corresponds to the operation of the wireless device 18 of Figure 6. It should be noted that in FIGS. 5A and 5B, the index and polling in the DCI are separately encoded. Of course, they can be jointly coded as (for example): Ÿ 00 = store the feedback with index 0 Ÿ 01 = store the feedback with index 1 Ÿ 10 = store the feedback with index 2 Ÿ 11 = store with index 3 The feedback and clearing of the feedback/empty buffer after N subframes is shown in Figure 5A. In the first example, the wireless device 18 receives a DCI message with a buffer index of 00 and thus, the respective HARQ back The flag is stored in the HARQ feedback buffer at the buffer location corresponding to index 00. In the next subframe, the wireless device 18 receives the DCI message with one of the polling buffer indices 01 and thus stores the respective HARQ feedback flag in the buffer location corresponding to index 01 in the HARQ feedback buffer. Subsequently, the wireless device 18 receives another DCI message having the polling buffer indices 02 and 13 in the subframe, and thus stores the respective HARQ feedback flags in the HARQ feedback buffer corresponding to the indexes 02 and 13 At the buffer location. The network (e.g., radio access node 14) polls the wireless device 18 for HARQ feedback. In response to the network polling, the wireless device 18 transmits the HARQ feedback stored in the HARQ feedback buffer in the subframe T+d, in this example, where, for example, the subframe T is polled. The wireless device 18 and the value d can be a static value or a configurable value (e.g., HARQ timing offset K) configured by the network, as described above. Examples 2 and 3 of Figures 5A and 5B are similar to the first example but with a PDSCH error in the second subframe (Example 2) and a DCI error in the second subframe (Example 3). 6 is a flow chart showing the operation of a wireless device 18 in accordance with some embodiments of the present invention. It should be noted that in some embodiments, the HARQ feedback buffer is initialized such that all locations are set to some predetermined value (DTX in the exemplary embodiment described herein). It should be noted that the dashed box indicates the selection step. As depicted, the wireless device 18 first waits to receive a DCI message (steps 300 and 302). After receiving a DCI message, the wireless device 18 stores the appropriate HARQ flag (ACK or NACK) in the HARQ feedback buffer for a given index, where the index is, for example, provided in the DCI message (step 304). The process returns to step 300 and may be repeated until the wireless device 18 is polled by the network (step 306, YES). It should be noted that in some embodiments, step 306 is optional, wherein, for example, wireless device 18 may automatically send a feedback after reaching the last location in the HARQ feedback buffer. Think of this as an implicit poll. After polling, the wireless device 18 generates an xPUCCH message based on the status of the HARQ feedback buffer (step 308). For example, in some embodiments, wireless device 18 combines the downlink HARQ flag stored in the HARQ feedback buffer to provide a combined HARQ feedback (ie, a combined downlink HARQ feedback message). The combined HARQ feedback may be, for example, concatenated for one of the bit pattern/sequences of each downlink HARQ flag or as another example, derived from the HARQ flag stored in the HARQ feedback buffer by the joint encoding. One of the single codewords. The xPUCCH message contains, for example, a HARQ feedback flag stored in an HARQ feedback buffer in an encoded form. The wireless device 18 clears the HARQ feedback buffer (e.g., sets all items to DTX) (step 310). The wireless device 18 waits for d subframes (step 312) and then transmits the generated xPUCCH message on the xPUCCH (step 314). It should be noted that the value d (ie, the HARQ feedback delay) may be a predefined value (eg, one of the static values defined by a standard) or configured by the network (for example) to be similar to the HARQ timing offset K. One way to configure one of the configured values. In some embodiments, the HARQ feedback delay d is, for example, one of the wireless devices 18 processing one of the delay definition device specific values. In this case, different wireless devices 18 may have different device-specific delays from the time the wireless device 18 receives a DCI message until the wireless device 18 transmits a UCI (or more generally, HARQ feedback), more than one wireless device. 18 can transmit UCI messages simultaneously (ie, in the same subframe). This presents one of the problems of simultaneous transmission of UCI messages. This problem can be resolved by any of the following: 明确 Use explicit messaging to indicate UCI resources for wireless device 18 rather than implicit DCI to UCI mapping. This explicit communication may be subject to a communication (e.g., a communication HARQ offset timing K) indicated by one of the values of d used by the wireless device 18, as described above. Wireless devices 18 with different processing delays are assigned to different frequency resources.排 Scheduling wireless devices 18 with different processing delays on different DCI Control Channel Elements (CCEs). A new wireless device 18 scheduling is avoided for one of the UCIs that will transmit one of the UCI collisions that will be transmitted by another wireless device 18 that has already scheduled.advanced HARQ Feedback The HARQ feedback solution for xPUCCH in 5G as described above is not received, for example, in the form of a HARQ feedback report due to DCI errors on the downlink and/or due to xPUCCH errors on the uplink. The HARQ feedback can go through problems. As depicted in Figures 7A and 7B and Figure 8, in such cases, the network is unable to draw any conclusions regarding the success and/or unsuccessful reception of PUSCH transmissions to be covered by the unreceived report. In addition, the network can even draw erroneous conclusions based on ACKs (e.g., NACK ACK errors) that believe that unreceived transmissions will result in expensive higher layer retransmissions. Specifically, FIGS. 7A and 7B illustrate two problems called problem A and question B. In question A, a DCI error causes wireless device 18 not to receive a polling request/indicator in subframe SF#(J). Since the polling indicator is not received, the HARQ feedback buffer is not cleared, ie, all locations in the HARQ feedback buffer are not reset to DTX, and the wireless device 18 is not in the subframe SF #(J+2) The lieutenant transmits the HARQ feedback to the network. Thus, in this example, in the subframe SF #(J+1), a NACK is stored in the first location in the HARQ feedback buffer, where the NACK overwrites/hides the HARQ feedback buffer due to The DCI error in the sub-frame SF #(J) is not transmitted to the ACK of the network. In the subframe SF #(J+2), a NACK is stored in the second position in the HARQ feedback buffer, wherein the NACK overwrites/hides the HARQ feedback buffer due to the subframe SF #(J The DCI error in the transmission is not transmitted to the ACK of the network. In the subframe SF #(J+3), an ACK is stored in the third position in the HARQ feedback buffer, wherein the ACK overwrites/hides the HARQ feedback buffer due to the subframe SF #(J The DCI error in the ) is not transmitted to one of the NACKs of the network. In the subframe SF #(J+4), an ACK is stored in the fourth position in the HARQ feedback buffer, wherein the ACK overwrites/hides the HARQ feedback buffer due to the subframe SF #(J The DCI error in the ) is not transmitted to one of the networks DTX. In question B, the xPUCCH feedback is lost in the uplink such that the xPUCCH is not received in the subframe SF #(J+2). It should be noted that the network does not know how to distinguish between problem A and question B. In both questions A and B, at the sub-frame SF #(J+2), the network will not be in the sub-frames SF #(J-3), SF #(J-2), SF #(J- 1) and SF #(J) does not receive any HARQ feedback for downlink transmissions, and the network is unable to draw any conclusions about such downlink transmissions. At the sub-frame SF #(J+7), the network will retransmit all NACK-enabled HARQ programs (ie, HARQ programs with buffer indices 0 and 1), which correspond to the sub-frame SF #( J+1) and SF #(J+2) downlink transmission. The network will similarly assume that the downlink transmissions of the sub-frames SF #(J+3) and SF #(J+4) are ACKed. This is all correct, but the network does not know the receiving status of the sub-frames SF #(J-3), SF #(J-2), SF #(J-1), and SF #(J), because the corresponding status The flag has been overwritten by the new status flag. Figure 8 illustrates one of the cases (question C) that led to one of a number of consecutive DCI errors. In addition to the problem of problem A of FIG. 7A, for problem C, the DCI error at the sub-frame SF #(J+1) will cause the item having an index 0 in the HARQ feedback buffer not to be updated. This in turn will cause the network to erroneously assume that the corresponding downlink transmission has been ACKed at the subframe SF #(J+7), and in fact, should indicate it as DTX. Embodiments of the present invention reinforce the HARQ feedback solution for xPUCCH in 5G as described above. It should be noted that the term xPUCCH is used herein to refer to (especially) an uplink control channel in a 5G network. However, the name xPUCCH is used only for clarity and ease of discussion and the actual line control channel in 5G can be given a different name. An overview of the invention is outlined in Figure 9 described below. Most importantly, embodiments of the present invention: Ÿ ensure that the wireless device 18 does not simply use the new state but replaces a previously received old state (ACK/NACK/DTX) using a more complex procedure (see Figure 11 and corresponding description below). And ensure that the network correctly interprets the lack of feedback (DCI error or xPUCCH error) and responds accordingly to take appropriate action (see Figure 12 and the corresponding description below). Using the enhancements disclosed herein, the HARQ feedback solution described above is more reliable for control channel errors (i.e., DCI errors) in the downlink and control channel errors (i.e., xPUCCH errors) in the uplink. It ensures that the expensive DTX/NACK ACK errors that would trigger higher layer retransmissions are mitigated at the expense of some additional HARQ retransmissions that are not expensive. As an additional bonus, it implicitly interprets the lack of HARQ feedback as quickly as possible, thus providing the shortest possible HARQ round trip time (RTT). The details of an embodiment of the enhanced HARQ feedback solution are provided to a large extent by the flow charts of Figures 9-13. The following sections of this paragraph provide some more detailed explanations and possible embodiments of these figures. Further, an illustration of the present invention in use is shown in the examples of FIGS. 14A-14C, 15A-15C, 16A and 16B, 17A and 17B, and 18A and 18B. It should be noted that the following discussion focuses on polling HARQ feedback solutions, as this is the most complex; however, enhancements can also be applied to direct scheduling HARQ feedback solutions, as mentioned below. Figure 9 depicts a summary/algorithm analysis for one of the overall HARQ feedback procedures. In particular, FIG. 9 illustrates how the individual programs of FIGS. 10-13, 14A-14C, 15A-15C, and 16A and 16B work together. As depicted, the network (e.g., radio access node 14) transmits DCI messages on a control channel (referred to as xPDCCH) and also transmits downlink data on a downlink shared channel (referred to as xPDSCH). At the UE/wireless device 18, the wireless device 18 performs one of the UE side feedback procedures that causes the HARQ feedback to the network. On the network side, each HARQ program performs a network side HARQ feedback interpretation procedure to interpret HARQ feedback from the wireless device 18 and take (several) appropriate actions. 10 is a flow chart showing one of the network side polling procedures in accordance with some embodiments of the present invention. In some embodiments, the network side polling procedure is performed by the radio access node 14. The network will ensure that for each xPDSCH transmission, the scheduled HARQ procedure is associated with one of the locally unique buffer indices (BI) also indicated in the DCI. The BI is directed to the index of the HARQ feedback buffer at the wireless device 18, which defines the location of the corresponding HARQ flag to be stored in the HARQ feedback buffer. Executing BI_MAX After these transfers, the polling bits are set in the DCI. Here, BI_MAX Corresponds to the size of the HARQ feedback buffer at the wireless device 18. It should be noted that xPDSCH is used herein as the name of the PDSCH in a 5G network for clarity and ease of discussion. However, the actual name of the downlink shared channel in a 5G network may be given another name. In some embodiments, BI_MAX A predetermined value is given by, for example, a related specification, while in other embodiments it can be statically or semi-statically configured by, for example, higher layers. In still other embodiments, it can be dynamically set in the DCI. It should be noted that for the "direct scheduling" case described above, it is obvious that the polling portion can be omitted. Specifically, as depicted, the program begins at step 400 and sets BI to zero (step 402). The radio access node 14 determines whether for the current subframe, the downlink data transmission is scheduled for the wireless device 18 (referred to as the user) (step 404). If not scheduled, the radio access node 14 waits until the next subframe (step 406) and then the program returns to step 404. If the downlink data transmission is scheduled for the wireless device 18 (step 404; YES), the radio access node 14 associates the respective HARQ program to be transmitted with the current BI (step 408) and includes the BI in the use downlink. The way authorization is transmitted to the respective DCI messages of the wireless device 18 (step 410). The radio access node 14 determines whether BI is equal to BI_MAX (Step 412). If not, the BI is incremented (step 414) and the process proceeds to step 406. Once BI reaches BI_MAX (Step 412; YES), the radio access node 14 sets the polling flag/indicator in the DCI message to be transmitted to the wireless device 18 (step 416) and the process then returns to step 402. 11 illustrates a UE side or wireless device side feedback procedure in accordance with some embodiments of the present invention. This procedure is the same as the procedure of Figure 6, but provides an enhancement of the storage step 304. In general, the feedback procedure is about when the wireless device 18 successfully decodes at least the DCI message indicating the xPDSCH transmission (and possibly also the xPDSCH transmission itself). As mentioned previously, the DCI message includes a BI and a polling indicator (which may be in the form of, for example, a polling bit). The wireless device 18 maintains one of the HARQ feedback buffers in which the reception status (ACK/NACK/DTX) is stored. The HARQ feedback buffer is typically cleared, ie, all items are reset to DTX after each poll. Each item in the HARQ feedback buffer is indexed using the previously described BI. In this embodiment, instead of simply replacing the previously received old receive state (also referred to herein as a HARQ flag) in one of the HARQ feedback buffers using the currently received receive state, the wireless device 18 instead uses the allowable network. The road is enhanced by a better and more instructive interpretation of HARQ feedback when receiving HARQ feedback. This is important in the case of DCI errors where the HARQ feedback buffer is not flushed from polling because the polling indicator is not received. In some embodiments, one of the items of the HARQ feedback buffer has stored a NACK even if the current reception corresponding to the buffer entry (ie, the same BI) is successful and thus will indicate an ACK. . However, for the sake of reliability, a stored ACK will always be overwritten by a NACK if the current reception corresponding to this buffer entry (ie, the same BI) is unsuccessful. An example of use is given in Example 8 of Figure 16B. In some other embodiments, the stored value of the previous buffer item (the buffer index thereof is represented by an expression (BI-1 )%(BI _MAX +1 ) given) replaced by DTX in the case where the buffer index is not indicated in the previous DCI. This can occur when there is a DCI error for one of the transmissions. This implicit DTX flag will, for example, prevent error propagation of the (most importantly) NACK ACK error. An example of use is given in Example 9 of Figures 17A and 17BB. Again, it should be noted that for the directly scheduled HARQ feedback solution described above, it is obvious that the polling portion may be omitted, otherwise the remainder should be applied. As shown in Figure 11, the enhanced storage procedure is as follows. After receiving a DCI message (step 302, YES), the wireless device 18 determines whether the respective downlink data has been successfully received (step 500). If successful, the wireless device 18 determines whether the entry in the HARQ feedback buffer for the BI included in the DCI message is a NACK (step 502). If not NACK, the wireless device 18 stores an ACK in the location/item of the BI indication contained in the received DCI message in the HARQ feedback buffer (step 504). Conversely, if the HARQ feedback buffer is a NACK for the item of BI included in the received DCI message, the wireless device 18 stores or otherwise maintains a NACK in the HARQ feedback buffer for Included in the BI of the received DCI message (step 506). In this way, the previous NACK is not hidden or overwritten by an ACK. Returning to step 500, if the downlink data is not successfully received by the wireless device 18, the wireless device 18 stores a NACK in the HARQ feedback buffer at the location/item of the BI indication included in the DCI message (step 506). ). Depending on the situation, the program can continue to detect a previous DCI error. In this regard, the wireless device 18 sets BI either from step 504 or step 506._PREV =BI (step 508) and then set BI_PREV =(BI_PREV –1)%(BI_MAX +1) (step 510). Step 510 will index BI_PREV Set to a sequence of possible BI values {0, 1, ..., BI_MAX Previous index in }. Again, it should be noted that the equation given in step 510 assumes that BI is an unsigned integer. If you use a signed integer, the equation becomes BI_PREV =(BI_PREV +BI_MAX )%(BI_MAX +1). Wireless device 18 then compares BI_PREV And BI_LAST , where BI_LAST Contains the BI in the latest previously successfully received DCI message. So if BI_PREV Not equal to BI_LAST This means that there is a previous DCI error. So if BI_PREV Not equal to BI_LAST The wireless device 18 stores the DTX in the HARQ feedback buffer by BI._PREV At the defined location (step 514) and the program returns to step 510. It should be noted that if there are multiple consecutive DCI errors, the program will detect the DCI errors and store the DTX in the respective HARQ feedback buffer locations. Once BI_PREV =BI_LAST (meaning that there is no longer a DCI error), the wireless device 18 will BI_LAST Set to BI (step 516). Next, the program proceeds to step 306 as described above with respect to FIG. 12 is a flow chart showing one of network side xPUCCH detection procedures in accordance with some embodiments of the present invention. This procedure is performed by a network node (e.g., radio access node 14). Here, the network (e.g., radio access node 14) expects HARQ feedback on xPUCCH during a given subframe period (step 600). For BI=0,...,BI_MAX The HARQ feedback is expressed as {FB(BI)} (step 602). In some embodiments, if the signal-to-interference plus noise ratio (SINR) received for the xPUCCH is above a given threshold T_HIGH (It may be set by, for example, one of the higher layer settings) (step 604, YES), then the HARQ feedback is considered trustworthy (step 606). For the sake of illustration, any of the examples of FIGS. 14A-14C, 15A-15C, 16A and 16B, 17A and 17B, and 18A and 18B are shown. In some embodiments, when the SINR received for the xPUCCH is below the threshold T_HIGH But higher than another threshold T_LOW (When it is also possible to set one of the parameters, for example, by a higher layer) (step 608, YES), the received HARQ feedback is considered untrustworthy (step 610). In this case, all of the considered transmissions are NACKed (step 612), i.e., the HARQ feedback for all BIs in this report is set to NACK. This would actually consume some additional HARQ retransmissions, but would avoid the more expensive higher layer retransmissions originating from the premature release of one of the considered HARQ procedures due to a NACK/DTX ACK error. For purposes of this illustration, see Example 10 in Figure 18A and Example 11 in Figure 18B, respectively. For both of the above embodiments, the network sets BI=0 (step 614), and the network will then target each BI covered by the report (ie, BI=0...BI)_MAX The HARQ feedback of the BI continues to be processed for each HARQ procedure associated with the particular BI (steps 616-630). In particular, {HP(BI} is the full HARQ program associated with BI (step 616). HP (BI) is the first element of {HP(BI)} and is removed from {HP(BI)} This element (step 618). The network removes the association between the HARQ program HP (BI) and BI (step 620). Next, the network processes the HARQ program HP (BI) HARQ feedback FB (BI) (step 622). This HARQ feedback process is detailed in Figure 12. The network determines if {HP(BI)} is empty (step 624). If not, the program returns to step 618. Once {HP(BI)} is empty , then incrementing BI (step 626). At this moment, if BI is greater than BI_MAX (Step 628), the program ends (step 630); otherwise, the program returns to step 616 and repeats for this new BI. Returning to step 608, in still other embodiments, when the SINR received for the xPUCCH is below the threshold T_LOW (Step 608, No), the network will conclude that the wireless device 18 has not attempted to transmit any xPUCCH feedback and therefore there is a DCI error in the corresponding poll (step 632). The network will then implicitly assume that the HARQ feedback for the associated xPDSCH transmission is DTX (where BI=BI_MAX This is because this cannot be received by the wireless device 18 (step 634). Next, the network settings BI=BI_MAX (Step 636) and the process proceeds to step 616 to immediately process the implicit DTX feedback. For the sake of illustration, see Figure 7 in Figure 16A, Figure 8 in Figure 16B, and Figure 9 in Figure 17A and Figure 17B. FIG. 13 is a flow chart showing one of network side HARQ feedback interpretation procedures according to some embodiments of the present invention. This procedure is performed by a network node such as, for example, the radio access node 14. Here, a specific BI HARQ feedback is given for the relevant HARQ program. Depending on the indicated feedback (ACK/NACK/DTX), the redundancy version (RV) to be used by the HARQ program will be updated (NACK) or not (DTX) accordingly. The particular HARQ procedure will then be indicated (towards the scheduler) as being eligible for retransmission (NACK or DTX) or free (ACK). In the case of ACK, the HARQ program will be cleared and a new data indicator (NDI) will be switched. In particular, as illustrated in Figure 13, the program begins (e.g., in step 622 of Figure 12) when a HARQ feedback FB (BI) for a HARQ program HP is to be processed (step 700). If the HARQ feedback (FB) is DTX (step 702; YES), the network marks the HARQ program HP flag/required to be retransmitted (step 704). Otherwise, if the HARQ feedback (FB) is NACK (step 706; YES), the network updates the RV of the HARQ program HP (step 708) and marks the HARQ program HP flag/repeated as requiring retransmission (step 704). Otherwise, if the HARQ feedback (FB) is ACK (step 710; YES), the network clears the HARQ program HP and switches its new data indicator (NDI), which is one of the existing indicators in LTE, thereby The HARQ program is instructed to clear the HARQ buffer (this is because the transmission is unrelated to a previous transmission and is a new transmission) (step 712) and the HARQ program HP flag/mark is marked as free/prepared for new material (step 714). It should be noted that step 710 is not necessary because if the HARQ feedback is non-DTX and non-NACK, then in this example it must be ACK. Therefore, the program can proceed directly to step 712 from the "NO" branch of step 706. 14A to 14C, 15A to 15C, 16A and 16B, 17A and 17B, and 18A and 18B illustrate several examples, which illustrate the enhanced HARQ feedback solution described above. Various aspects of particular embodiments. These examples are referred to as Examples 1 through 11. Example 1 illustrates an example in which all DCI messages and downlink data are successfully received by the wireless device 18 and the uplink transmission of the HARQ feedback is successfully received by the network. Example 2 illustrates an example of a PDSCH error that results in one of the NACKs of one of the sub-frames SF #(J-1). In response to the NACK, the network will retransmit the HARQ program from the secondary frame SF #(J-1) using a new RV. Example 3 illustrates one of the cases with multiple PDSCH errors. In response to the NACK of the sub-frames SF #(J-2) and SF #(J-1), the network will retransmit from the sub-frames SF #(J-2) and SF #(J-1) using the new RV. HARQ program. Example 4 illustrates a case with one of the DCI errors for a non-polled DCI message. Here, the network will retransmit the HARQ program from the subframe SF #(J-1) without updating the RV. Example 5 illustrates one of a number of DCI errors on a non-polled DCI message. Here, the network will retransmit the HARQ program from the subframes SF #(J-2) and SF #(J-1) without updating the RV. Example 6 illustrates one example of a mixed DCI error on a non-polled DCI message. Here, the network will retransmit the HARQ program from the sub-frames SF #(J-3), SF #(J-2), and SF #(J-1), where the first HARQ program is retransmitted using a new RV but The latter two HARQ programs are retransmitted without updating the RV. Example 7 illustrates a case of one of the DCI errors on a polled DCI message. At the sub-frame SF #(J+2) (ie, the sub-frame where the network expects the transmission of the HARQ feedback), the network will notice the lack of HARQ feedback and be aware of the sub-frame SF #( There is a DCI error at J), and the subframe SF #(J) will be retransmitted using the same RV. At the sub-frame SF #(J+7), the network will not perform any operation because the HARQ feedback contains all ACKs. Example 8 illustrates one of the cases of DCI error plus one additional PDSCH error on a polled DCI message. It should be noted that comparing this example to Problem A of Figure 7A would be useful. At the sub-frame SF #(J+2), the network will notice the lack of HARQ feedback and realize that there is a DCI error at the sub-frame SF #(J). This will implicitly DTX the HARQ program transmitted at the sub-frame SF #(J) and then retransmit the sub-frame SF #(J) using the same RV. At the sub-frame SF #(J+7), the network will retransmit all NACK-completed HARQ procedures. Ÿ For BI=0: Retransmit the HARQ program of the sub-frames SF #(J-3) and SF #(J+1)Ÿ for BI=1: Retransmit the sub-frame SF #(J-2) and SF # (J+2) HARQ program Ÿ for BI=1: Retransmission of the HARQ program of the sub-frames SF #(J-1) and SF #(J+3) can be noted, the sub-frame SF #(J-3 ), SF #(J-2) and SF #(J+3) retransmission "unnecessary", because all of these have been successfully received. Given the low error rate of DCI (~1%), the impact of such "unnecessary" retransmissions will be small compared to the amount of PDSCH error. Example 9A illustrates one of the cases in which multiple DCI errors exist. Comparing this example to Problem C of Figure 8 would be advantageous. At the sub-frame SF #(J+2), the network will notice the lack of HARQ feedback and realize that there is a DCI error at the sub-frame SF #(J). This will implicitly DTX the HARQ program transmitted at the sub-frame SF #(J), and therefore, the HARQ program of the sub-frame SF #(J) will be retransmitted. The network also detects one of the BI sequences "jumping" (ie, BI = 2 before BI = 1 instead of BI = 0), and therefore concludes that BI = 0 may be lost. In other words, the network detects a DCI error in a DCI error corresponding to one of the subframes missing BI=0. Therefore, the item in the HARQ feedback buffer is set to DTX. In addition, at the sub-frame SF #(J+7), the network will receive the "new" transmission from the sub-frame SF #(J+1) and the "old" from the sub-frame SF #(J-3). The transmission is marked as DTX and thus both will be retransmitted. The other "new" transmissions at the ACK subframes SF #(J+2), SF #(J+3) and SF #(J+4) are also ACKed from the sub-frame SF #(J -2) and old transmission of SF #(J-1). Example 9B illustrates another case with multiple DCI errors. At the sub-frame SF #(J+2), the network will notice the lack of HARQ feedback and realize that there is a DCI error at the sub-frame SF #(J). This will implicitly DTX the HARQ program transmitted at the sub-frame SF #(J), and therefore, the HARQ program of the sub-frame SF #(J) will be retransmitted. The network also detects one of the BI sequences "jumping" (ie, BI = 2 and BI = 0 before BI = 1 and BI = 2), and therefore concludes that BI = 0 and BI = 1 may be lost. In other words, the network detection is for one of the DCI errors corresponding to one of the DCI errors of the subframes with missing BI=0 and BI=1. Therefore, the items in the HARQ feedback buffer are set to DTX. In addition, at the sub-frame SF #(J+7), the network will receive "new" transmissions from the sub-frames SF #(J+1) and SF #(J+2) and from the sub-frame SF #( The "old" transmissions of J-3) and SF #(J-2) are marked as DTX and, therefore, both will be retransmitted. The other "new" transmissions at the ACK subframes SF #(J+3) and SF #(J+4) will also be ACKed to the old transmission from the subframe SF #(J-1). Example 10 illustrates one example of a successful reception of all downlink data but the presence of an x PUCCH error (ie, xPUCCH transmission lost or, in other words, not received by the network). At the sub-frame SF #(J+2), the network will notice the lack of HARQ feedback and realize that there is an xPUCCH error. This will implicitly NACK all of the HARQ procedures that are expected to be reported (ie, from the sub-frames SF #(J-3), SF #(J-2), SF #(J-1), and SF #(J) HARQ program). At the sub-frame SF #(J+7), the network will not perform any operation because all downlink transmissions are ACKed. Example 11 illustrates one of the cases in which xPUCCH feedback is lost plus the presence of additional PDSCH errors. Comparing this example to Problem B of Figure 7B would be advantageous. At the sub-frame SF #(J+2), the network will notice the lack of HARQ feedback and realize that there is an xPUCCH error. This will implicitly NACK all of the HARQ procedures that are expected to be reported (ie, from the sub-frames SF #(J-3), SF #(J-2), SF #(J-1), and SF #(J) HARQ program). It may be noted that the retransmission of the subframes SF #(J-3) and SF #(J-2) is "unnecessary" because these downlink transmissions are successfully received. Therefore, it is important to keep the xPUCCH error to be relatively low. In addition, at the sub-frame SF #(J+7), the network will retransmit all NACK-completed HARQ procedures. Ÿ For BI=0: Retransmit the HARQ program of the sub-frame SF #(J+1) (the sub-frame SF #(J-3) has been NACKed). Ÿ For BI=1: Retransmit the HARQ program of the sub-frame SF #(J+2) (the sub-frame SF #(J-2) has been NACKed).Exemplary wireless device and radio access node implementation 19 is a schematic block diagram of a wireless device 18 (e.g., a UE) in accordance with some embodiments of the present invention. As illustrated, the wireless device 18 includes one or more processors 28 (eg, a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), and/or the like) The memory 30 is coupled to one or more transceivers 32 of one or more antennas 38, each of which includes one or more transmitters 34 and one or more receivers 36. In some embodiments, the functionality of the wireless device 18 described above may be implemented in whole or in part in software that is stored, for example, in memory 30 and executed by processor(s) 18. In some embodiments, a computer program is provided that includes instructions that, when executed by at least one processor, cause at least one processor to perform the functionality of the wireless device 18 in accordance with any of the embodiments described herein. In some embodiments, a carrier containing one of the aforementioned computer program products is provided. The carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (eg, a non-transitory computer readable medium, such as a memory). 20 is a schematic block diagram of a wireless device 18 in accordance with some other embodiments of the present invention. The wireless device 18 includes one or more modules 40, each of which is implemented in a software. The module(s) 40 provide the functionality of the wireless device 18 described herein. For example, the module(s) 40 can include a receiving module 40-1 operable to receive DCI messages from the network, wherein the DCI message can include an indication of one of the HARQ timing offsets K, depending on the embodiment, A HARQ feedback buffer index and/or a polling indicator is as described above with respect to various embodiments of the present invention. As another example, the module(s) 40 can include a transmission module 40-2 that is operable to transmit HARQ feedback in accordance with any of the embodiments described herein. As yet another example, the module(s) 40 can include a storage module 40-3 operable to store HARQ feedback in a HARQ feedback buffer, as described above with respect to some embodiments of the present invention. 21 is a schematic block diagram of a base station 14 (or more generally, a radio access node 14) in accordance with some embodiments of the present invention. This discussion can be equally applied to other types of radio access nodes. In addition, other types of network nodes may have similar architectures (especially with respect to including (several) processors, memory, and a network interface). As shown, the base station 14 includes: a baseband unit 42 that includes one or more processors 44 (eg, CPU, ASIC, FPGA, and/or the like), memory 46, and a network interface 48; And coupled to one or more of the one or more antennas 56, the one or more radio units 50 each include a transmitter 52 and one or more receivers 54. In some embodiments, the functionality of the base station 14 described above (or more generally, the functionality of a radio access node or, more generally, the functionality of a network node) may be wholly or partially in software. Implemented, the software is stored, for example, in memory 46 and executed by processor(s) 44. 22 is a schematic block diagram of a virtualization embodiment of a base station 14 in accordance with some embodiments of the present invention. This discussion can be equally applied to other types of radio access nodes. In addition, other types of network nodes may have similar virtualization architectures. As used herein, a "virtualized" network node (eg, a virtualized base station or a virtualized radio access node) is, for example, one (several) of entities in one (several) network The execution of one (several) of the virtual machines on the processing node implements at least a portion of the functionality of the network as one of the network nodes of a virtual component. As shown, in this example, base station 14 includes a baseband unit 42 that includes one or more processors 48 (eg, CPU, ASIC, FPGA, and/or the like), memory 46, and network Interface 48; and one or more radio units 50 coupled to one or more antennas 56, each of the one or more radio units 50 including one or more transmitters 52 and one or more receivers 54 as described above . The baseband unit 42 is connected to the radio unit(s) 50 via, for example, an optical cable or the like. Baseband unit 42 is coupled to one or more processing nodes 58 via network interface 48, which is coupled to one or more network(s) 60 or is included as part of one (several) network 60. Each processing node 58 includes one or more processors 62 (e.g., CPU, ASIC, FPGA, and/or the like), memory 64, and a network interface 66. In this example, the functionality 68 of the base station 14 described herein is implemented at one or more processing nodes 58 or distributed across the baseband unit 42 and one or more processing nodes 58 in any desired manner. In some particular embodiments, some or all of the functions 68 of the base station 14 described herein are implemented to be implemented by one or more virtual machines implemented in one (several) virtual environments hosted by the (s) processing node 58 The virtual component. As will be appreciated by those of ordinary skill, additional communication or communication between processing node 58 and baseband unit 42 is used to perform at least some of the desired functions 68. It will be apparent that in some embodiments, the baseband unit 42 may not be included, in which case the radio unit(s) 50 are in direct communication with the processing node(s) 58 via one (several) suitable network interface. Thus, with respect to the direct scheduling embodiment, in some embodiments, the program node(s) 58 are operable to indicate or otherwise cause the DCI including the indication of the HARQ feedback timing offset K to be via the radio unit(s) 50 to Transmission by the wireless device 18. As another example, some or all of the network side polling procedures of FIG. 10 may be performed by (several) processing nodes 58 and/or some or all of the network side xPUCCH detection procedures of FIG. 12 may be based on (s) processing node 58 via (several The radio unit 50 receives downlink HARQ feedback execution from the wireless device 18. In some embodiments, a computer program is provided that includes instructions that, when executed by at least one processor, cause the at least one processor to perform a network (eg, as a network node in accordance with any of the embodiments described herein) The functionality of a form or a radio access node. In some embodiments, a carrier containing one of the aforementioned computer program products is provided. The carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (eg, a non-transitory computer readable medium, such as a memory). 23 is a schematic block diagram of a base station 14 (or more generally, a radio access node 14) in accordance with some other embodiments of the present invention. The base station 14 includes one or more modules 70, each of which is implemented in a software. The module(s) 70 provide the functionality of the base station 14 described herein. The (several) module 70 can include, for example, a transmission module 70-1 operable to transmit DCI messages and downlink data in accordance with any of the embodiments described herein and operative to operate in accordance with any of the embodiments described herein One of the HARQ feedback receiving modules 70-2 is received and processed. It should be noted that other types of radio access nodes may be similar architectures as shown for base station 14 in FIG.Illustrative embodiment Although not limited to any particular embodiment, some illustrative embodiments of the invention are described below. Embodiment 1: A method of operating a wireless device (18) in a cellular communication system (10), comprising: ○ receiving (102) downlink control information in a first subframe T, wherein The downlink control information includes an indication of a hybrid automatic repeat request HARQ timing offset K; and ○ transmitting (106) HARQ feedback in a subframe T+K. Embodiment 2: The method of Embodiment 1, wherein transmitting (106) the HARQ feedback comprises: o combining a plurality of downlink HARQ feedback flags into a single downlink HARQ transmission; and ○ at the secondary The single downlink HARQ transmission is transmitted in frame T+K. The method of embodiment 2, wherein combining the plurality of HARQ feedback flags comprises jointly encoding the plurality of HARQ feedback flags into one codeword for the single downlink HARQ transmission. The method of embodiment 2 or embodiment 3, wherein the downlink control information further comprises information indicating which of the feedback flags are combined into the single downlink HARQ transmission. The method of any one of embodiments 1 to 4, wherein the indication of the HARQ timing offset K is one of the HARQ timing offsets K. The method of any one of embodiments 1 to 4, wherein the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, wherein the N is a pre- Define or pre-configure values. The method of any one of embodiments 1 to 6, further comprising detecting a link control information failure. Ÿ Embodiment 8: A wireless device (18) adapted to operate in accordance with any of embodiments 1-7. Embodiment 9: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a transceiver (32); ○ at least one processor (28) And a memory (30) storing instructions executable by the at least one processor (28) whereby the wireless device (18) is operable to: § via the transceiver (32) Receiving downlink control information in the first subframe T, wherein the downlink control information includes an indication of a hybrid automatic repeat request HARQ timing offset K; and § via the transceiver in a subframe T Transfer HARQ feedback in +K. Embodiment 10: The wireless device (18) of Embodiment 9, in order to transmit the HARQ feedback, the wireless device (18) is further operable to: ○ combine a plurality of downlink HARQ feedback flags into a single Downlink HARQ transmission; and ○ transmitting the single downlink HARQ transmission in the subframe T+K. Embodiment 11: The wireless device (18) of embodiment 10, wherein, in order to combine the plurality of HARQ feedback flags, the wireless device (18) is further operative to jointly encode the plurality of HARQ feedback flags as One codeword for this single downlink HARQ transmission. Embodiment 12: The wireless device (18) of Embodiment 10 or Embodiment 11, wherein the downlink control information further comprises information indicating which of the feedback flags are combined into the single downlink HARQ transmission. The wireless device (18) of any one of embodiments 9 to 12, wherein the indication of the HARQ timing offset K is a value of the HARQ timing offset K. The wireless device (18) of any one of embodiments 9 to 12, wherein the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, wherein N is a predefined or pre-configured value. Embodiment 15: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: ○ for receiving a downlink in a first subframe T And a component of the road control information, wherein the downlink control information includes an indication of a hybrid automatic repeat request HARQ timing offset K; and ○ a component for transmitting the HARQ feedback in a subframe T+K. Embodiment 16: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a receiving module (40-1) operable Receiving downlink control information in a first subframe T, wherein the downlink control information includes an indication of a hybrid automatic repeat request HARQ timing offset K; and a transmission module (40-2) ), it is operable to transmit HARQ feedback in a sub-frame T+K. Embodiment 17: A method of operating a wireless device (18) in a cellular communication system (10), comprising: ○ receiving (302) including a hybrid automatic repeat request under one of HARQ feedback buffer indices The downlink control information message is stored; and ○ the downlink HARQ feedback flag is stored (304) in a location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. Embodiment 18: The method of embodiment 17, further comprising the step of repeatedly receiving (302) and storing (304) for one or more additional downlink control information messages. The method of embodiment 18, further comprising: ○ receiving (306, YES) a polling request from a network node; and ○ after receiving the polling request: § generating (308) including storing One of the downlink HARQ feedback flags in the downlink HARQ feedback buffer is an uplink control message; and § transmits (314) the uplink control message. The method of embodiment 19, wherein the generating the uplink control message comprises jointly encoding the downlink HARQ feedback flags into one of the code words for the uplink control message. The method of embodiment 19 or 20, wherein transmitting the uplink control message comprises transmitting the uplink control message in a subframe T+N, wherein the subframe T receives the round The sub-frame of the request is requested and N is a HARQ feedback offset. Embodiment 22: The method of Embodiment 21, wherein the HARQ feedback offset N is predefined or pre-configured. Embodiment 23: The method of Embodiment 21, wherein the HARQ feedback offset N is received according to one of the polling request received in the subframe T or the downlink control information message. The method of any one of embodiments 17 to 23, further comprising detecting a link control information failure. Embodiment 25: A wireless device (18) adapted to operate in accordance with any of embodiments 17-24. Embodiment 26: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a transceiver (32); ○ at least one processor (28) And a memory (30) storing instructions executable by the at least one processor (28) whereby the wireless device (18) is operable to: s receive via the transceiver (32) including a hybrid automatic repeat request HARQ feedback buffer index one downlink control information message; and § storing a downlink HARQ feedback flag in the HARQ feedback buffer corresponding to the HARQ feedback buffer In the position of the index. Embodiment 27. The wireless device (18) of embodiment 26, wherein the wireless device (18) is further operative to repeatedly receive and store the one or more additional downlink control information messages. Embodiment 28: The wireless device (18) of Embodiment 27, wherein the wireless device (18) is further operable to: ○ receive, via the transceiver (32), a polling request from a network node; and ○ After receiving the polling request: § generating an uplink control message including one of the downlink HARQ feedback flags stored in the downlink HARQ feedback buffer; and § transmitting the uplink control message . Embodiment 29: The wireless device (18) of embodiment 28, wherein, in order to generate the uplink control message, the wireless device (18) is further operative to jointly encode the downlink HARQ feedback flag as A codeword for one of the uplink control messages. Embodiment 30: The wireless device (18) of embodiment 28 or 29, wherein the wireless device (18) is further operative to transmit the uplink control message in the subframe T+N, wherein the subframe T The subframe in which the polling request is received and the N is a HARQ feedback offset. Embodiment 31: The wireless device (18) of Embodiment 30, wherein the HARQ feedback offset N is pre-defined or pre-configured. Embodiment 31: The wireless device (18) of Embodiment 30, wherein the HARQ feedback offset N is received according to the polling request received in the subframe T or an index received in the downlink control information message . The wireless device (18) of any one of embodiments 26 to 31, wherein the wireless device (18) is further operative to detect a downlink control information failure. Embodiment 33: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: ○ for receiving a hybrid automatic repeat request HARQ feedback One of a buffer index is a component of a downlink control information message; and ○ is configured to store a downlink HARQ feedback flag in a location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index member. Embodiment 34: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a receiving module (40-1) operable Receiving a downlink control information message including a hybrid automatic repeat request HARQ feedback buffer index; and a storage module (40-3) operable to return a downlink HARQ feedback flag Stored in the HARQ feedback buffer in a location corresponding to the HARQ feedback buffer index. Embodiment 35a: A method of operating a wireless device (18) in a cellular communication system (10), comprising: ○ receiving a message including a hybrid automatic repeat request HARQ feedback buffer index; Determining that the data for a current subframe is successfully received, wherein the current subframe is the subframe in which the message is received; ○ determining that a negative acknowledgement NACK flag is stored in one of the wireless devices (18) HARQ back Retrieving a buffer corresponding to one of the HARQ feedback buffer indices included in the message; and ○ determining that a NACK flag is stored in the HARQ feedback buffer of the wireless device (18) After the buffer location of the HARQ feedback buffer index included in the message, even if the receiving of the data of the current subframe is successful, a NACK flag is maintained on the wireless device (18). The feedback buffer corresponds to the buffer location of the HARQ feedback buffer index included in the message. Embodiment 35: A method of operating a wireless device (18) in a cellular communication system (10), comprising: o receiving a downlink including a hybrid automatic repeat request HARQ feedback buffer index Controlling the information DCI message; ○ determining the success of receiving the data for a current subframe, wherein the current subframe is the subframe in which the DCI message is received; ○ determining that a negative acknowledgement NACK flag is stored in the wireless device (18) one of the HARQ feedback buffers corresponding to one of the HARQ feedback buffer indices included in the DCI message; and ○ determining that a NACK flag is stored in the wireless device (18) After the buffer location corresponding to the HARQ feedback buffer index included in the DCI message in the HARQ feedback buffer, even if the reception of the data for the current subframe is successful, a NACK flag is still used. The buffer location maintained in the feedback buffer of the wireless device (18) corresponds to the HARQ feedback buffer index included in the DCI message. The method of embodiment 35, further comprising transmitting the HARQ feedback stored in the HARQ feedback buffer to a network node. The method of embodiment 35, further comprising determining, for the current subframe, whether a plurality of DCI errors have occurred in a plurality of consecutive subframes preceding the current subframe. The method of embodiment 37, further comprising: after determining that a plurality of DCI errors have occurred in the plurality of consecutive sub-frames, storing a discontinuous transmission DTX flag in the HARQ feedback buffer Corresponding to one of the HARQ feedback buffer indexes immediately before the HARQ feedback buffer index included in the DCI message. Embodiment 39: A computer program product comprising instructions that, when executed on at least one processor, cause the at least one processor to perform the method of any one of embodiments 35 to 39. Embodiment 40: A carrier comprising the computer program of embodiment 39, wherein the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium. Embodiment 41: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a transceiver (32); ○ at least one processor (28) And a memory (30) storing instructions executable by the at least one processor (28) whereby the wireless device (18) is operable to: s receive via the transceiver (32) including a hybrid automatic repeat request HARQ feedback buffer index one downlink control information DCI message; § determining success of receiving data for a current subframe, wherein the current subframe is receiving the DCI message The sub-frame; determining a negative acknowledgement NACK flag stored in one of the HARQ feedback buffers of the wireless device (18) corresponding to one of the HARQ feedback buffer indices included in the DCI message And § after determining that a NACK flag is stored in the HARQ feedback buffer of the wireless device (18) corresponding to the buffer location of the HARQ feedback buffer index included in the DCI message, even if The receipt of the information of the current sub-frame will be successful. A NACK flag is maintained at the buffer location of the feedback buffer of the wireless device (18) corresponding to the HARQ feedback buffer index included in the DCI message. Embodiment 42: The wireless device (18) of Embodiment 41, wherein the wireless device (18) is further operative to transmit the HARQ feedback stored in the HARQ feedback buffer to a network node. Embodiment 43: The wireless device (18) of Embodiment 41, wherein the wireless device (18) is further operable to determine, for the current subframe, whether the plurality of consecutive sub-messages before the current sub-frame Multiple DCI errors appear in the box. Embodiment 44: The wireless device (18) of Embodiment 41, wherein the wireless device (18) is further operative to transmit a discontinuous transmission after determining that a plurality of DCI errors have occurred in the plurality of consecutive subframes The DTX flag is stored in the HARQ feedback buffer at a position corresponding to one of the HARQ feedback buffer indices immediately before the HARQ feedback buffer index included in the DCI message. Embodiment 45: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: ○ for receiving a hybrid automatic repeat request HARQ feedback One of the buffer indexes is a component of the downlink control information DCI message; ○ a means for determining success of receiving data for a current subframe, wherein the current subframe is the subframe in which the DCI message is received o for determining that a negative acknowledgement NACK flag is stored in a HARQ feedback buffer of one of the wireless devices (18) corresponding to a buffer location of the HARQ feedback buffer index included in the DCI message. And ○ after determining that a NACK flag is stored in the HARQ feedback buffer of the wireless device (18) corresponding to the buffer location of the HARQ feedback buffer index included in the DCI message, Even if the receiving of the data of the current subframe is successful, maintaining a NACK flag in the feedback buffer of the wireless device (18) corresponds to the HARQ feedback buffer index included in the DCI message. The location of the buffer . Embodiment 46: A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a receiving module (40-1) operable Receiving a downlink control information DCI message including a hybrid automatic repeat request HARQ feedback buffer index; and a first decision module (40) operable to determine data for a current subframe Receiving success, wherein the current subframe is the subframe in which the DCI message is received; ○ a second decision module (40) operable to determine that a negative acknowledgement NACK flag is stored in the wireless device ( 18) one of the HARQ feedback buffers corresponding to one of the HARQ feedback buffer indices included in the DCI message; and a flag storage module (40-3) operable After determining that a NACK flag is stored in the HARQ feedback buffer of the wireless device (18) corresponding to the buffer location of the HARQ feedback buffer index included in the DCI message, even for the current secondary The receipt of the information of the frame is successful, and a NACK flag is still maintained in the wireless device. (18) of the feedback buffer corresponding to the DCI message includes feedback of the HARQ buffer position at which the buffer index. Embodiment 47a: A method of operating a radio access node (14) in a cellular communication system (10), comprising: ○ determining from a wireless device (18) to the radio access node (14) Whether the quality of one of the uplink control channels is less than the upper threshold but greater than the lower threshold; and ○ after determining that the quality of the uplink control channel is less than the upper threshold but greater than the lower threshold, Each of the plurality of flags is set to a negative acknowledgement NACK flag, wherein the flags have been received from the wireless device (18). Embodiment 47: A method of operating a radio access node (14) in a cellular communication system (10), comprising: ○ determining from a wireless device (18) to the radio access node (14) Whether the quality of one of the uplink control channels is less than a predefined upper threshold but greater than a predefined lower threshold; and ○ determining that the quality of the uplink control channel is less than the predefined upper threshold but After being greater than the predefined lower threshold, each of the plurality of bundled HARQ feedback flags that have been received by the uplink control channel from the wireless device (18) is set to a negative acknowledgement NACK flag. The method of embodiment 47, wherein the plurality of bundled HARQ feedback flags have corresponding indexes BI={1, ..., BI_MAX }, where BI_MAX Is greater than one of the predefined values, and the method further comprises: o determining whether the quality of the uplink control channel from the wireless device (18) to the radio access node (14) is less than the predefined a limit value; and ○ after determining that the quality of the uplink control channel is less than the predefined lower threshold, is to be received from the wireless device (18) via the uplink control channel and corresponds to the index BI_MAX One of the plurality of bundled HARQ feedback flags is set to indicate that one of the DCI errors is discontinuously transmitted by the DTX flag. [Embodiment 49] A computer program product comprising instructions which, when executed on at least one processor, cause the at least one processor to perform the method of any one of embodiments 47 to 48. Embodiment 50: A carrier comprising the computer program of embodiment 49, wherein the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium. Ÿ Embodiment 51: A radio access node (14) for a cellular communication system (10), the radio access node (14) comprising: ○ a radio unit (50); ○ at least one processor (44) And a memory (46) storing instructions executable by the at least one processor (44) whereby the radio access node (14) is operable to: § determine from a wireless device (18) Whether the quality of one of the uplink control channels to one of the radio access nodes (14) is less than a predefined upper threshold but greater than a predefined lower threshold; and § in determining the uplink control channel The bundled hybrid automatic repeat request HARQ back that has been received by the uplink control channel from the wireless device (18) after the quality is less than the predefined upper threshold but greater than the predefined lower threshold Each of the flags is set to a negative acknowledgement NACK flag. Embodiment 52: The radio access node (14) of Embodiment 51, wherein the plurality of bundled HARQ feedback flags have corresponding indexes BI={1, ..., BI_MAX }, where BI_MAX Is greater than one of the predefined values, and the radio access node (14) is further operable to: ○ determine the uplink control channel from the wireless device (18) to the radio access node (14) Whether the quality is less than the predefined lower threshold; and ○ after determining that the quality of the uplink control channel is less than the predefined lower threshold, the channel is to be controlled from the wireless device via the uplink (18) Receive and correspond to index BI_MAX One of the plurality of bundled HARQ feedback flags is set to indicate that one of the DCI errors is discontinuously transmitted by the DTX flag. Ÿ Embodiment 53: A radio access node (14) for a cellular communication system (10), the radio access node (14) comprising: ○ for determining from a wireless device (18) to the radio storage Taking a component of one of the uplink control channels of one of the nodes (14) for less than a predefined upper threshold but greater than a predefined lower threshold; and ○ for determining the uplink control channel After the quality is less than the predefined upper threshold but greater than the predefined lower threshold, the plurality of bundled hybrid automatic repeat request HARQ feedbacks that have been received by the uplink control channel from the wireless device (18) Each of the flags is set as a component of a negative acknowledgement NACK flag. Embodiment 54: A radio access node (14) for a cellular communication system (10), the radio access node (14) comprising: a decision module operable to determine from a wireless device (18) whether the quality of one of the uplink control channels of one of the radio access nodes (14) is less than a predefined upper threshold but greater than a predefined lower threshold; and ○ a flag setting module, It is operable to, after determining that the quality of the uplink control channel is less than the predefined upper threshold but greater than the predefined lower threshold, the channel has been controlled by the uplink from the wireless device (18) Each of the plurality of bundled hybrid automatic repeat request HARQ feedback flags received is set to a negative acknowledgement NACK flag. The following abbreviations are used throughout the invention. Ÿ 3GPP 3rd Generation Partnership Project Ÿ 5G 5th Generation Ÿ AAS Advanced Antenna System Ÿ ACK Response Ÿ AM Response Mode Ÿ ASIC Application-Specific Integrated Circuit Ÿ BI Buffer Index Ÿ CCE Control Channel Element Ÿ CPU Central Processing Unit Ÿ DCI Down Link Control Information Ÿ DTX Discontinuous Transmission Ÿ eNB Enhanced or Evolved Node B Ÿ ePDCCH Enhanced Entity Downlink Control Channel Ÿ FDD Divided Duplex Ÿ FPGA Field Programmable Gate Array Ÿ HARQ Hybrid Automatic Repeat Request Ÿ LTE Long Evolution Ÿ MIMO Multiple Input Multiple Output MME Mobility Management Entity Ÿ ms millisecond Ÿ MTC Machine Type Communication Ÿ NACK Negative Response Ÿ NDI New Data Indicator Ÿ OFDM Orthogonal Multiplex Ÿ PDCCH Physical Downlink Control Channel Ÿ PDSCH Physical Downlink Shared Channel Ÿ P-GW Packet Data Network Gateway Ÿ PUCCH Physical Uplink Control Channel Ÿ PUSCH Physical Uplink Shared Channel Ÿ RAN Radio Access Network Roller RLC Radio Link Control ŸRTT Round Trip Time ŸRV Redundancy VersionŸS-GW Servo GatewayŸSINR Signal to Interference plus Noise Ratio ŸTB Test Bench ŸTDD Time Division Duplex ŸUCI Uplink Control InformationŸ Improvements and Modifications to Embodiments of the Invention will be apparent to those skilled in the art. All such improvements and modifications are considered to be within the scope of the concepts disclosed herein and the scope of the following claims.

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The accompanying drawings, which are incorporated in FIG 1 illustrates a cellular communication system in accordance with an embodiment of the present invention; FIG. 2 illustrates a wireless device (e.g., a user equipment device (UE)) and a radio in accordance with an embodiment of the present invention. FIG. 3A and FIG. 3B are diagrams showing an embodiment of the present invention; FIG. 4 is a diagram showing a wireless device and a radio access according to another embodiment of the present invention; 5A and 5B illustrate an example of some other embodiments of the present invention; FIG. 6 illustrates a flow of operation of a wireless device in accordance with some embodiments of the present invention. FIG. 7A and FIG. 7B and FIG. 8 illustrate a problem associated with bundled hybrid automatic repeat request (HARQ) feedback in a cellular communication system; FIG. 9 illustrates one embodiment of the present invention. Operation of a wireless device and a network node; FIG. 10 is a flow chart showing one of the polling procedures performed by a network node in accordance with some embodiments of the present invention; FIG. 11 is a diagram illustrating some embodiments in accordance with the present invention. One of the flow charts of one of the UE side feedback procedures; 12 is a flow chart showing one of the network side x entity uplink control channel (xPUCCH) detection procedures according to some embodiments of the present invention; FIG. 13 is a diagram showing a network side HARQ according to some embodiments of the present invention. FIG. 14A to FIG. 14C, FIGS. 15A to 15C, FIGS. 16A and 16B, FIGS. 17A and 17B, and FIGS. 18A and 18B illustrate various embodiments of the present invention. 19 and FIG. 20 are block diagrams of an exemplary embodiment of a wireless device in accordance with some embodiments of the present invention; and FIGS. 21-23 are exemplary implementations of a base station in accordance with some embodiments of the present invention. Example block diagram.

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Claims (48)

A method of operating a wireless device (18) in a cellular communication system (10), comprising: receiving (302) a downlink control information message including a hybrid automatic repeat request HARQ feedback buffer index And storing the downlink HARQ feedback flag (304) in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. The method of claim 1, further comprising: receiving (302) one or more additional downlink control information messages including respective HARQ feedback buffer indices; and controlling the one or more additional downlink control information messages Each additional downlink control information message stores (304) a respective downlink HARQ feedback flag in the HARQ feedback buffer corresponding to the HARQ feedback included in the respective downlink control information message. The buffer index is in one of the locations. The method of claim 1 or 2, further comprising: receiving (306; yes) a polling request from a network node (14); and transmitting a downlink HARQ feedback transmission after receiving the polling request (314 To the network node (14), the downlink HARQ feedback is based on the downlink HARQ feedback flags stored in the HARQ feedback buffer. The method of claim 3, further comprising: generating (308) an uplink control message including one of the information indicating the downlink HARQ feedback flags stored in the downlink HARQ feedback buffer; Transmitting (314) the downlink HARQ feedback includes transmitting (314) the uplink control message. The method of claim 4, wherein generating (308) the uplink control message comprises jointly encoding (308) the downlink HARQ feedback flag as one of the code words for the uplink control message. The method of claim 4, wherein generating (308) the uplink control message comprises mapping (308) each downlink HARQ feedback flag in the HARQ feedback buffer to an uplink control channel A separate entity resource. The method of claim 4, wherein transmitting (314) the downlink HARQ feedback comprises transmitting the downlink HARQ feedback in a subframe T+K, wherein the subframe T receives the polling request therein The sub-frame and K are a HARQ timing offset. The method of claim 7, wherein receiving (306; yes) the polling request comprises receiving (306; YES) downlink control information in the subframe T, wherein the downlink control information includes the polling request And one of the HARQ timing offsets K is indicated. The method of claim 8, wherein the indication of the HARQ timing offset K is one of the HARQ timing offsets K. The method of claim 8, wherein the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, where N is a predefined value. The method of claim 8, wherein the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, where N is a pre-configured value. The method of claim 8, wherein the indication of the HARQ timing offset K is a value S, wherein the HARQ timing offset is K=N+S, wherein N is a predetermined minimum HARQ timing offset of one of the wireless devices (18) shift. The method of claim 8, wherein the indication of the HARQ timing offset K is a value X, wherein the HARQ timing offset K is based on the value X. The method of claim 1 or 2, wherein each of the downlink HARQ feedback flags in the HARQ feedback buffer includes a first bit sequence indicating a response ACK, and a second representation indicating a negative acknowledgement NACK The bit sequence and one of a plurality of code points in one code space representing one of the third bit sequence of the downlink control information failure. The method of claim 1 or 2, wherein storing (304) the downlink HARQ feedback flag comprises: if the wireless device (18) successfully receives the corresponding downlink data, storing an indication of an ACK in the The HARQ feedback buffer corresponds to the location of the HARQ feedback buffer index; and if the wireless device (18) fails to receive the corresponding downlink data, storing one of the NACK indications in the HARQ feedback The buffer corresponds to the location of the HARQ feedback buffer index. The method of claim 15, wherein before storing (304) the downlink HARQ feedback flag, a preset value is stored in the location in the HARQ feedback buffer, wherein the preset value is One of the line link control information errors is indicated. The method of claim 15, wherein before storing (304) the downlink HARQ feedback flag, a preset value is stored in the location in the HARQ feedback buffer, wherein the preset value is one One of the NACK indications. The method of claim 1 or 2, wherein storing (304) the downlink HARQ feedback flag comprises: determining (500) whether the reception of data for a current subframe is successful, wherein the current subframe is Receiving the subframe of the downlink control information message; determining (502) whether a NACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index; After the receiving of the data of the current subframe is successful and determining that a NACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index, even if the data is for the current subframe The reception is successful, and a NACK flag is still maintained (506) at the location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. The method of claim 18, wherein storing (304) the downlink HARQ feedback flag further comprises determining that the receiving of the data for the current subframe is successful and determining that a NACK flag is not stored in the HARQ feedback buffer After the location in the device corresponding to the HARQ feedback buffer index, an ACK flag is stored (504) at the location in the HARQ feedback buffer corresponding to the HARQ feedback buffer index. The method of claim 18, wherein storing (304) the downlink HARQ feedback flag further comprises storing (506) a NACK flag after determining that the receiving of the data for the current subframe is unsuccessful The HARQ feedback buffer corresponds to the location of the HARQ feedback buffer index. The method of claim 18, further comprising: determining (508 to 512) whether a downlink control information error occurs in one or more previous subframes, the one or more previous subframes being in the current pair One or more subframes before the frame; and after determining that the downlink control information error occurs in the one or more previous subframes, one or more downlink control information errors are indicated or The plurality of flags are stored (514) in the HARQ feedback buffer corresponding to one or more HARQ feedback buffer indexes immediately before the HARQ feedback buffer index included in the downlink control information message One or more locations. A wireless device (18) for a cellular communication system (10), the wireless device (18) adapted to: receive one of a hybrid automatic repeat request HARQ feedback buffer index downlink control information And storing the downlink HARQ feedback flag in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. The wireless device (18) of claim 22, which is further adapted to operate according to the method of any one of claims 2 to 21. A wireless device (18) for a cellular communication system (10), comprising: a transceiver (32); at least one processor (28); and a memory (30) storing instructions, the instructions Executable by the at least one processor (28), whereby the wireless device (18) is operable to: receive, via the transceiver (32), one of a downlink including a hybrid automatic repeat request HARQ feedback buffer index Controlling the information message; and storing the downlink HARQ feedback flag in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. The wireless device (18) of claim 24, wherein the wireless device (18) is further operable to: receive, via the transceiver (32), a respective HARQ, by the at least one processor (28) executing the instructions Retrieving one or more additional downlink control information messages of the buffer index; and for each additional downlink control information message of the one or more additional downlink control information messages, a respective downlink HARQ back The flag is stored in the HARQ feedback buffer in a location corresponding to one of the HARQ feedback buffer indices included in the respective downlink control information message. The wireless device (18) of claim 25, wherein the wireless device (18) is further operable to: receive via the transceiver (32) by executing the instructions by the at least one processor (28) (306; Yes) a polling request from one of the network nodes (14); transmitting, via the transceiver (32), the HARQ feedback to a network node (14) after receiving the polling request, the HARQ feedback system is based on storage The downlink HARQ feedback flags in the HARQ feedback buffer. The wireless device (18) of any one of claims 24 to 26, wherein the wireless device (18) is further operable to: determine data for a current subframe for storing the downlink HARQ feedback flag Whether the receiving is successful, wherein the current subframe is the subframe in which the downlink control information message is received; determining whether a negative acknowledgement NACK flag is stored in the HARQ feedback buffer corresponds to the HARQ feedback At the location of the buffer index; and determining that the receipt of the data for the current subframe is successful and determining that a NACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index Thereafter, even if the reception of the data for the current subframe is successful, a NACK flag is maintained at the location of the HARQ feedback buffer corresponding to the HARQ feedback buffer index. The wireless device (18) of claim 27, wherein in order to store the downlink HARQ feedback flag, the wireless device (18) is further operative to determine that the reception of the data for the current subframe is successful and determine a After the NACK flag is not stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index, storing a response ACK flag in the HARQ feedback buffer corresponding to the HARQ feedback buffer At this position of the index. The wireless device (18) of claim 27, wherein the wireless device (18) is further operative to determine that the receipt of the data for the current subframe is unsuccessful in order to store the downlink HARQ feedback flag, A NACK flag is stored in the HARQ feedback buffer at the location corresponding to the HARQ feedback buffer index. The wireless device (18) of claim 27, wherein the wireless device (18) is further operable to: determine whether one or more of the previous subframes are present by executing the instructions by the at least one processor (28) A downlink control information error occurs, the one or more previous sub-frames being in one or more sub-frames before the current sub-frame; and determining that the one or more previous sub-frames appear After the link control information error, indicating that one or more of the one or more downlink control information errors are stored in the HARQ feedback buffer corresponds to being included in the downlink control information message The HARQ feedback buffer is indexed at one or more of the one or more HARQ feedback buffer indices. A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: for receiving a downlink including a hybrid automatic repeat request HARQ feedback buffer index a component of the link control information message; and means for storing the downlink HARQ feedback flag in a HARQ feedback buffer corresponding to one of the HARQ feedback buffer indices. A wireless device (18) enabled to operate in a cellular communication system (10), the wireless device (18) comprising: a receiving module (40-1) operable to receive a hybrid automatic Retransmitting a downlink control information message requesting one of the HARQ feedback buffer indexes; and a storage module (40-3) operable to store the downlink HARQ feedback flag in a HARQ feedback buffer The device corresponds to one of the locations of the HARQ feedback buffer index. A method of operating a network node (14) of a cellular communication system (10), comprising: determining (404) whether to schedule a wireless device (18) in a subframe; determining at the secondary After the frame is scheduled for the wireless device (18), the hybrid automatic repeat request HARQ program transmitted to the wireless device (18) in the subframe is associated with a buffer index (408); And the buffer index is included (410) in the downlink control information transmitted to the wireless device (18) in the subframe. The method of claim 33, further comprising setting (402) the buffer index to an initial value prior to determining (404) whether to schedule the wireless device (18) in the subframe. The method of claim 34, further comprising: determining (412) whether the buffer index is equal to a predefined maximum value; incrementing the buffer index after determining that the buffer index is not equal to the predefined maximum value (414) After determining that the buffer index is equal to the predefined maximum value, a polling flag is set (416) in the downlink control information transmitted to the wireless device (18) in the subframe. The method of claim 35, further comprising: setting (416) the polling flag from the wireless device in response to the downlink control information transmitted to the wireless device (18) in the subframe 18) Receive downlink HARQ feedback. The method of claim 36, further comprising: determining (604) whether the signal to interference plus noise ratio SINR of one of the uplink control channels on which the downlink HARQ feedback is received is greater than or equal to a first a predefined threshold; and if the SINR of the uplink control channel is greater than or equal to the first predefined threshold, then: determining (606) that the downlink HARQ feedback should be trusted; and processing (614 to 628) The downlink HARQ feedback. The method of claim 37, further comprising: determining (608) whether the SINR of the uplink control channel is less than the first predefined threshold but greater than or equal to a second predefined threshold; and if If the SINR of the uplink control channel is less than the first predefined threshold but greater than or equal to the second predefined threshold, then: determining (610) that the downlink HARQ feedback should not be trusted; The link HARQ feedback settings (612) are all NACKs; and the NACKs are processed (614 to 628). A network node (14) for a cellular communication system (10), the network node (14) being adapted to: determine whether to schedule a wireless device (18) in a subframe; After scheduling the wireless device (18) in the subframe, causing a hybrid automatic repeat request HARQ program transmitted to the wireless device (18) in the subframe to be associated with a buffer index; And the buffer index is included in the downlink control information transmitted to the wireless device (18) in the subframe. The network node (14) of claim 39, which is further adapted to operate according to the method of any one of claims 34 to 38. A network node (14, 58) for a cellular communication system (10), comprising: at least one processor (44, 62); and a memory (46, 64) storing instructions, the instructions Executable by the at least one processor (44, 62), whereby the network node (14, 58) is operable to: determine whether to schedule a wireless device (18) in a subframe; After the secondary device schedules the wireless device (18), the hybrid automatic repeat request HARQ program transmitted to the wireless device (18) in the secondary frame is associated with a buffer index; The buffer index is included in the downlink control information transmitted to the wireless device (18) in the subframe. The network node (14, 58) of claim 41, wherein the network node (14, 58) is further operative to determine whether it is at least by executing the instructions by the at least one processor (44, 62) The buffer index is set to an initial value before the subframe is scheduled for the wireless device (18). As the network node (14, 58) of claim 42, wherein the network node (14, 58) is further operable to: determine the buffer via the at least one processor (44, 62) executing the instructions Whether the index is equal to a predefined maximum value; after determining that the buffer index is not equal to the predefined maximum value, incrementing the buffer index; and after determining that the buffer index is equal to the predefined maximum value, A polling flag is set in the downlink control information transmitted to the wireless device (18) in the frame. The network node (14, 58) of claim 43, wherein the network node (14, 58) is further operable to: responsive to the execution of the instructions by the at least one processor (44, 62) The downlink control information transmitted to the wireless device (18) in the secondary frame sets (416) the polling flag and receives downlink HARQ feedback from the wireless device (18). As the network node (14, 58) of claim 44, wherein the network node (14, 58) is further operable to: execute the instructions via the at least one processor (44, 62) to: And receiving, on the downlink HARQ feedback, one of the uplink control channels, the signal-to-interference plus noise ratio SINR is greater than or equal to a first predefined threshold; and if the SINR of the uplink control channel Greater than or equal to the first predefined threshold, then: determining that the downlink HARQ feedback should be trusted; and processing the downlink HARQ feedback. The network node (14, 58) of claim 45, wherein the network node (14, 58) is further operable to: determine the uplink by executing the instructions by the at least one processor (44, 62) Whether the SINR of the link control channel is less than the first predefined threshold but greater than or equal to a second predefined threshold; and if the SINR of the uplink control channel is less than the first predefined threshold But greater than or equal to the second predefined threshold, then: determining that the downlink HARQ feedback should not be trusted; setting the downlink HARQ feedback to all NACKs; and processing the NACKs. A network node (14, 58) enabled to operate in a cellular communication system (10), the network node (14, 58) comprising: for determining whether a wireless device is in a subframe (18) a component of the schedule; configured to, after determining to schedule the wireless device (18) in the subframe, to transmit the hybrid automatic weight to the wireless device (18) in the subframe And means for transmitting a request for the HARQ program to be associated with a buffer index; and means for transmitting the buffer index in the downlink control information transmitted to the wireless device (18) in the subframe. A network node (14, 58) enabled to operate in a cellular communication system (10), the network node (14, 58) comprising: a decision module (70) operable to determine whether Arranging a wireless device (18) in a subframe; an association module (70) operable to determine, in the subframe, the wireless device (18) in the subframe After scheduling, a hybrid automatic repeat request HARQ program transmitted to the wireless device (18) in the subframe is associated with a buffer index; and a transmission module (70-1) The operation is such that the buffer index is included in the downlink control information transmitted to the wireless device (18) in the subframe.