Utilizing harq for uplink grants received in wireless communications

Cross-reference

0001This application is incorporated herein by reference in its entirety, and is filed on August 8, 2008, entitled "GRANT IN MESSAGE 2 FLIPS NDI", US Provisional Application No. 61 / 087,307. , And claims the interests of US Provisional Application No. 61 / 08,257 entitled "GRANT IN MESSAGE 2 FLIPS NDI" filed on August 12, 2008.

0002The present disclosure relates generally to wireless communications, and in particular to providing HARQ functionality to system access communications.

0003Wireless communication systems have been widely deployed to provide various types of communication content, such as voice and data. A typical wireless communication system is a multiple access system that can support communication with multiple users by sharing available system resources (eg, bandwidth, transmit power, etc.). Examples of such multiple access systems are code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and so on. Including the ones. In addition, the system has specifications such as 3GPP, 3GPP LTE (long term evolution), Ultra Mobile Broadband (UMB), and / or EV-DO (evolution data optimized), one of them. Comply with multi-carrier wireless specifications such as the above revised version.

0004In general, wireless multiple access communication systems support communication for multiple mobile devices at the same time. Each mobile device communicates with one or more base stations via transmission over forward and reverse links. A forward link (or downlink) refers to a communication link from a base station to a mobile device, and a reverse link (or uplink) refers to a communication link from a mobile device to a base station. In addition, communication between mobile devices and base stations includes single-input single-output (SISO) systems, multiple-input single-output (MISO) systems, multiple-input multiple-output (MIMO) systems, and the like. Established through. In addition, the mobile device can communicate with another mobile device (and / or a base station with another base station) in a peer-to-peer wireless network configuration.

0005Automatic repeat / request (HARQ) and other automatic repeat / request (HARQ) technologies can be used between mobile devices and base stations to facilitate successful communication. For example, a base station can transmit a signal to a mobile device, which returns control data to the base station indicating whether it has successfully received the data in the signal. If the reception is unsuccessful, the base station retransmits the signal. For this purpose, a device that utilizes HARQ receives data and determines whether it is a new transmission or a retransmission in the data (new data indicator: NDI). ) Has a HARQ entity that determines. However, NDI is not always present in transmissions between mobile devices and base stations, especially for system access communications.

0006The following presents a simplified overview of the various aspects of the subject matter required to provide a basic understanding of such aspects. This overview is not an extensive overview of all intended embodiments and is not intended to identify a key or essential element or to depict the scope of such embodiments. Its sole purpose is to present in a simplified form some concepts of the disclosed embodiments as a prelude to a more detailed description, which will be shown later.

0007According to one or more embodiments and their corresponding disclosures, various aspects are described in connection with facilitating hybrid automatic repeat request (HARQ) support for system access communications in wireless networks. In one example, if a resource grant is received in a system access response, the HARQ entity processing the HARQ communication determines that the received response is a new transmission. In another example, a resource grant is received through an established control channel and / or it is a temporary device. If address) is indicated, the HARQ entity determines that the grant is a retransmission because it is inferred that the previous transmission has not arrived at its destination. In yet another example, if a new data indicator is present in the resource grant, the HARQ entity will indicate the formal address in determining whether the indicator has been incremented or not, and the resource received on the established control channel. Grants can be ignored. It should be recognized that if the indicator is determined to be incremented by the HARQ entity, it can indicate that the grant is a new transmission. In this regard, HARQ functionality can be implemented for system access in wireless networks.

0008A method for interpreting HARQ functionality in system access procedures is provided according to relevant aspects. The method involves receiving a communication with a resource grant from an access point in a wireless network. The method also represents determining whether the communication is a new transmission or a retransmission, and based on that determination, a new transmission or retransmission, at least in part based on the type of communication. Includes providing that communication to the HARQ process along with the indication.

0009Another aspect relates to a wireless communication device. A wireless communication device includes at least one processor configured in a wireless network to receive a response to a system access request with a resource grant from one or more access points and determine the type of response. The processor is further configured to provide the response to the HARQ process, along with an indication representing a new transmission or retransmission, at least in part based on the type of response. The wireless communication device also includes memory coupled to at least one processor.

0010Yet another aspect relates to a wireless communication device that facilitates the use of HARQ communication in system access procedures. The wireless communication device includes means for receiving communication from an access point in response to a system access request. The radio communication device further includes means for providing the communication to the HARQ process, along with an indication representing a new transmission or retransmission determined based at least in part on the type of communication.

0011Yet another aspect relates to a computer program product, which in a wireless network has a computer-readable medium containing a code that causes at least one computer to receive communication with a resource grant from an access point. A computer-readable medium also comprises a code for causing at least one computer to determine whether the communication is a new transmission or a retransmission, based on at least a portion of the type of communication. In addition, the computer-readable medium comprises a code for causing at least one computer to provide communication to the HARQ process, with an indication representing a new transmission or retransmission, based on its determination.

0012To achieve the aforementioned and related objectives, one or more embodiments are fully described below and have the features specifically indicated in the claims. The following description and attached figures detail an exemplary embodiment of one or more embodiments. However, these embodiments use the principles of various embodiments and are only one of a variety of methods in which the embodiments described are intended to include all such embodiments and their equivalents. Shows the part.

0013<figref num="1">FIG. 1 is a block diagram of a system for communicating using a hybrid automatic repeat request (HARQ) according to various aspects.</figref><figref num="2">FIG. 2 is an example of an exemplary communication device for use in a wireless communication environment.</figref><figref num="3">Figure 3 shows an exemplary wireless communication network that implements the execution of system access procedures using HARQ.</figref><figref num="4">Figure 4 shows an exemplary wireless communication system for communicating system access messages using HARQ.</figref><figref num="5">FIG. 5 is a flow diagram of an exemplary methodology that facilitates the use of HARQ when communicating system access messages.</figref><figref num="6">FIG. 6 is a flow diagram of an exemplary methodology for performing HARQ on resource grants in a random access response.</figref><figref num="7">FIG. 7 is a flow diagram of an exemplary methodology for providing HARQ for resource grants through the control channel.</figref><figref num="8">FIG. 8 is a block diagram of an exemplary device that facilitates the provision of HARQ communication in system access procedures.</figref><figref num="9">FIG. 9 is a block diagram of an exemplary wireless communication device that can be used to implement various aspects of the functionality described herein.</figref><figref num="10">FIG. 10 shows an exemplary wireless multiple access communication system according to the various aspects presented herein.</figref><figref num="11">FIG. 11 is a block diagram illustrating an exemplary wireless communication system in which the various aspects described herein can function.</figref>

Detailed description of the invention

0014Various aspects of the required subject matter are described with reference to the figures. Similar reference numbers are used to refer to similar elements as a whole. In the following description, for the purposes of explanation, a number of specific details are provided to provide an overall understanding of one or more aspects. However, it is clear that such an embodiment can be implemented without these particular details. In another example, well-known structures and devices are shown in the form of block diagrams to facilitate the description of one or more embodiments.

0015As used in this application, the terms "component", "module", "system" and such may be hardware, firmware, a combination of hardware and software, software, or running software. Intended to refer to that computer-related entity. For example, components are, but are not limited to, processes, integrated circuits, objects, executables, threads of execution, programs, and / or computers running on a processor. As an example, both the application and the compute device running on the compute device can be components. One or more components reside within a process and / or execution thread, and one component is localized on one computer and / or distributed among two or more computers. In addition, these components can be run from a variety of computer-readable media with various data structures stored on it. A component is, for example, one or more data packets (eg, data from another component in a local system, a distributed system, and / or data from one component that interacts with another system over a signal over a network such as the Internet). It can communicate in local and / or remote processes according to the signal with.

0016In addition, various aspects are described herein in the context of wireless terminals and / or base stations. A wireless terminal refers to a device that provides users with voice and / or data connectivity. The wireless terminal is coupled to a computing device such as a laptop computer or desktop computer, or it is a self-contained device such as a personal digital assistant (PDA). device) can be. Wireless terminals are also referred to as systems, subscriber units, subscriber stations, mobile stations, mobiles, remote stations, access points, remote terminals, access terminals, user terminals, user agents, user devices, or user devices (UEs). .. Wireless terminals include subscriber stations, wireless devices, mobile phones, PCS phones, cordless phones, session start protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and handheld devices with wireless connection functions. , Or another processing device connected to a wireless modem. A base station (eg, an access point or advanced node B (eNB)) refers to a device in an access network that passes through one or more sectors and communicates with a wireless terminal via a wireless interface. The base station acts as a router between the wireless terminal and the rest of the access network, including the Internet Protocol (IP) network, by converting the received wireless interface frame into IP packets. The base station also coordinates the management of attributes for wireless interfaces.

0017In addition, the various functions described herein are performed in hardware, software, firmware, or any combination thereof. When implemented in software, its function is stored or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one location to another. The storage medium is any available medium that can be accessed by a computer. As an example not limited thereto, such computer readable media are accessed by RAM, ROM, EEPROM®, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or computer. It can be equipped with any alternative medium used to convey or store the desired program code in the form of instructions or data structures. Also, any connection is properly referred to as a computer readable medium. Software is transmitted from websites, servers, or other remote sources using, for example, coaxial cables, fiber optic cables, stranded pairs, digital subscriber lines (DSL), or wireless technologies such as infrared, wireless, and microwave. Wireless technologies such as coaxial cables, fiber optic cables, stranded pairs, DSL, or infrared, wireless, and microwave are then included in the definition of medium. Disc and disc are compact discs (CDs), laser discs (registered trademarks), optical discs, digital video discs (DVDs), floppy (registered trademarks) discs, as used herein. , Includes Blu-ray Disc (BD). A disc usually reproduces data by magnetic action, and a disc optically reproduces data with a laser. The above combinations should also be included within the scope of computer readable media.

0018The various techniques described herein include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and simplex. It is used for various wireless communication systems such as one-carrier FDMA (SC-FDMA) systems and other such systems. The terms "network" and "system" are often used interchangeably. The CDMA system implements wireless technologies such as Universal Terrestrial Radio Access (UTRA) and CDMA2000. UTRA includes wideband CDMA (W-CDMA®) and another variant of CDMA. In addition, CDMA2000 covers IS-2000, IS-95, and IS-856 standards. The TDMA system implements wireless technologies such as the Pan-European Digital Mobile Communication System (GSM®). OFDMA systems include advanced UTRA (E-UTRA), Ultra Mobile Broadband (UMB), and IEEE. Implements wireless technologies such as 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.11, and Flash OFDM (Flash-OFDM). UTRA and E-UTRA are part of the Universal Mobile Communication System (UMTS). 3GPP LTE (Long Term Evolution) is an upcoming release of UMTS that uses E-UTRA with OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). In addition, CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).

0019Various aspects will be presented in terms of systems that may include a large number of devices, components, modules and such. It is understood and recognized that various systems may include additional devices, components, modules, etc., and / or may not include all devices, components, modules, etc. discussed in connection with the diagram. Should be. A combination of these approaches can also be used.

0020With reference to the figure here, FIG. 1 illustrates a system 100 that facilitates hybrid automatic repeat request (HARQ) communication in a wireless network. In particular, the HARQ entity component 102 that manages a number of HARQ processes, such as the HARQ process 104, is provided. The HARQ process is used to simultaneously receive and transmit communications in unrelated wireless networks. A wireless node 106 capable of communicating with the HARQ entity component 102 over a wireless network is also depicted. In one example, the HARQ entity component 102 can send data from the HARQ process 104 to the radio node 106. Radio node 106 responds to HARQ entity component 102 with control data about information about the response, such as associated process identifiers, new data indicators (NDIs), and / or such. It can be communicated through the control channel. For example, HARQ Entity Component 102 forwards the response and associated control data to the appropriate HARQ process 104 (in one example, based on the process identifier received). A control channel relates to one or more parts of a frequency that spans one or more time periods that define the channel according to the wireless network. In one example, multiple parts of a frequency over a period of time can be multiple parts of a subcarrier in an OFDM configuration.

0021Based on the control data, the HARQ process 104 determines whether the data is a new transmission or a retransmission of the previous data. If the data is new, the HARQ process overwrites the associated buffer, allowing higher level applications to consume the data. If the data is retransmitted, the HARQ process combines that data with previously received data. In either case, the HARQ entity component 102 sends an acknowledgment (ACK) indicating that the data was successfully received or a negative response (NAK) indicating that the data reception was unsuccessful to the radio node 106. .. In one example, determining whether the reception of data was successful or unsuccessful involves an attempt to decode and / or demodulate the data from the received signal. For example, when a NAK is received, the radio node 106 identifies the same process identifier with data and a pseudo NDI (false). Resend NDI) to HARQ Entity Component 102. Thus, as indicated by the NDI, at least in part (eg, whether the NDI was incremented or not), the HARQ entity component 102 determines whether the given data is new or retransmitted. It notifies the appropriate HARQ process 104.

0022According to one example, the HARQ process 104 can receive system access requests for transmission over a wireless network. The HARQ entity component 102 can, for example, send its request to wireless node 106, which is the wireless node that provides access to the wireless network. The radio node 106 receives the request and, in one example, sends a system access request, including a resource grant, to the HARQ entity component 102. The HARQ entity component 102 receives the response and determines that it is a new transmission even if the NDI is not received because it is the response to the system access request. HARQ Entity Component 102, in one example, forwards a grant to the appropriate HARQ process 104 indicating that it is a new transmission that causes the HARQ process to overwrite the associated buffer with data. This happens at the Medium Access Control (MAC) layer. In another example, NDI is provided within the system access response as described herein.

0023In another example, radio node 106 sends a resource grant through the control channel established by HARQ Entity Component 102 for the associated device. If the control channel is associated with a temporary address of the device (eg, after resolving the conflict, until the device makes this address permanent), HARQ Entity Component 102 has not yet resolved the conflict (eg, radio). This indicates that the resource control (RRC) tier communication setup has not yet been completed), so the grant is considered to be retransmitted. Therefore, the HARQ entity component 102 distributes the resource grant to the appropriate HARQ process 104 and displays the grant as a retransmission. It should be recognized that after the conflict is resolved, a persistent or semi-persistent identifier will be assigned to the associated device.

0024In addition, the HARQ entity component 102 determines the NDI transmitted from the radio node 106 (eg, in the control data) to determine whether the data received from the radio node 106 is a new transmission or a retransmission. evaluate. Such an assessment, in one example, involves determining whether the NDI has been incremented since the previous transmission. When assessing the NDI as such, the HARQ entity component 102 determines that these grants are retransmissions and therefore, as described, in the grant received through the control channel associated with the device's tentative address. The indicated NDI can be ignored. In this regard, HARQ functionality is provided for system access communications in wireless networks.

0025Next, referring to FIG. 2, the communication device 200 involved in the wireless communication network is shown. The communication device 200 is a mobile device, a base station, a part thereof, or substantially any device capable of communicating in a wireless network. The communication device 200 acquires, as described, an access response receiving component 202 capable of receiving a system access response in the wireless network, control information and / or data transmitted in the wireless network. Can be a control and data receiving component Includes component) 204 and the HARQ entity component 102, which can manage a large number of HARQ processes to facilitate HARQ communication. As mentioned earlier, HARQ Entity Component 102 can manage the HARQ process to allow simultaneous independent communication, with iterations when it is necessary to facilitate the successful reception of data. it can. HARQ Entity Component 102 can receive communication from multiple devices in a wireless network and provide that communication to the appropriate HARQ process to indicate whether the communication is a new transmission or a retransmission, as described. ..

0026According to an example, the access response receiving component 202 receives a system access response from a radio node (not shown) in response to a system access request, in one example. This is received at the MAC layer in one example. The access response receiving component 202 forwards the system access response to the HARQ entity component 102, which can determine whether the response includes a resource grant, to facilitate subsequent communication. When including a resource grant, the HARQ entity component 102 determines that the system access response is a new transmission because the system access response is probably the first communication with the associated radio node. It should be recognized that a resource grant can be associated with, for example, one or more uplink data channel communication resources. In one example, the system access response is a random access channel (RACH) response, which is several handovers at specific times in the wireless network (eg, when switching from idle to active mode, when accessing the system after a radio failure). Received during the state (when the data arrives before the data channel is synchronized). In this regard, HARQ Entity Component 102, in one example, indicates that the response is a new transmission and sends the response to the appropriate HARQ process. Thus, the associated HARQ process of HARQ Entity Component 206 can overwrite the data in the HARQ process buffer with a system access response for upper layer consumption, as described.

0027In another example, the control / data reception component 204 can acquire control data and / or general data from one or more established control channels. For example, control channels are established using wireless devices to facilitate access to wireless networks. The control channel is established with a temporary address for the communication device 200 (eg, temporary cell radio network temporary identifier (T-CRNTI)), which is indicated in the system access response until the resource is scheduled. Control channels are also established with permanent and / or semi-permanent addresses (eg, once a resource is scheduled). In one example, the control / data reception component 204 receives one or more resource grants through one or more control channels. The control / data receiving component 204 provides one or more resource grants to the HARQ entity component 102. In one example, communication device 200 prioritizes grants received from system access requests. In this example, if the control / data receiving component 204 receives a resource grant through a control channel associated with a permanent or semi-permanent identifier (eg, established subsequent resource scheduling), the HARQ entity 102 is, for example, running. Indicates a new send to the associated HARQ process assigned to receive the resource grant when there is a random access procedure. This happens because the random access procedure has not been completed.

0028When the control / data receiving component 204 receives the resource grant through the control channel associated with the temporary address assigned to the communication device 200, the HARQ entity component 102 re-enters the HARQ process assigned to receive the resource grant. Indicates transmission. HARQ Entity Component 102 implies that receiving a grant through a temporary address implies that the conflict has not yet been resolved, thereby not receiving a system access request, or that it has not yet been processed. Therefore, it is displayed that it is a retransmission. In addition, when the access request is processed, the control / data reception component 204 can receive grants through the control channel associated with the permanent address, as described, which is associated with, for example, the temporary address control channel. Overwrite the buffer for the HARQ process that contains the grant. HARQ Entity Component 102 can perform the above behavior regardless of whether the new data indicator is included in the grant (and / or its value). In another example, the HARQ entity component 102 can determine for the received communication whether the NDI has been incremented compared to the previous transmission (eg, that communication is a new transmission). To conclude whether it is a retransmission or a retransmission). In this regard, the HARQ entity component 102 determines that these grants are retransmissions, as described, and therefore the NDI received for the grants through the control channel associated with the tentative address of communication device 200. Can be ignored.

0029As shown, the HARQ Entity Component 102, as described above, for example, when determining whether the transmission is a new transmission or a retransmission, the HARQ Entity Component 102 is the type of communication (eg,). Receives communication from the access response receiving component 202 and the control / data receiving component 204 based on the ability to determine (access response, control channel communication, etc.).

0030Here, with reference to FIG. 3, a wireless communication system 300 that facilitates the provision of HARQ functionality for initial communication related to system access requests is shown. Wireless devices 302 and / or 304 are mobile devices (eg, independent driven devices as well as modems), base stations, and / or parts thereof. In one example, the wireless devices 302 and 304 communicate using peer-to-peer or ad hoc technology when the devices 302 and 304 are of similar type. In addition, System 300 is a MIMO system and / or complies with one or more wireless network system specifications (eg EV-DO, 3GPP, 3GPP2, 3GPP LTE, WiMAX, etc.). Also, the components and functionality of the wireless device 302 presented and described below are present in the wireless device 304 in one example and vice versa. The composition depicted omits these components for brevity.

0031The wireless device 302 provides a RACH component 306, HARQ that provides a RACH through which different devices send requests (eg, RACH preambles) to establish data channel resources with the wireless device 302 to communicate over the wireless network. Includes a HARQ transmit component 308 that is used to send data to one or more different wireless devices, and a HARQ control data component 310 that generates and transmits HARQ control data related to HARQ transmission to one or more wireless devices. .. The wireless device 304 generates a system access request for transmission to or from one or more wireless devices, and / or a system access component 312 for receiving a system access response from it, a control channel with the wireless device. Includes a control channel receive component 314 that establishes and receives data transmitted through it, and a HARQ entity component 102 that facilitates HARQ communication with one or more wireless devices. In one example, the HARQ transmit component 310 further provides functionality similar to the HARQ entity component 102, as described below, and vice versa.

0032Following one example, the RACH component 306 provides a RACH that allows multiple wireless devices to send access requests to the wireless device 302. System access component 312, as described, RACH preamble, initial communication Generate a request for system access, such as request), or send message 1, and HARQ entity component 102 uses a HARQ process (not shown) to send the request through RACH. The request is, for example, when the wireless device 304 switches from idle mode to active mode, when recovering from a radio failure, when initiating a communication handover, when receiving data prior to data channel synchronization, and / or. Generated in similar cases. The RACH component 306 receives the request and decides whether to provide the set of data channel resources to the wireless device 304. The HARQ transmit component 308 sends a response to the system access request. In one example, it is transmitted as a RACH response, message 2 transmission, and / or as such. The HARQ control data component 310 transmits relevant control data where applicable (and / or if the radio devices 302 and 304 have previously established a HARQ control channel).

0033System access component 312 receives the system access response and provides it to HARQ entity component 102. The HARQ entity component 102 further includes a resource grant from wireless device 302 to determine if it is an access response (based on at least part of receiving it from system access component 312). Evaluate the response to determine if. HARQ Entity Component 102 provides the response to the HARQ process, along with an indication representing a new transmission, based on the displayed process identifier, as described earlier. This is irrelevant to any NDI that is sent or not sent with the response, as it indicates that the grant received in the system access response (random access response, message 2, etc.) is implicitly a new transmission. This is done, for example, at the MAC layer.

0034In another example, the random access response comprises an NDI that can be used by the HARQ entity component 102 to identify whether the response is a new transmission or a retransmission. In one example, the random access response resembles the following format:<tables num="1"><img id="000003" he="76" wi="169" file="JP2015216640A_D0001.tif" img-format="tif" img-content="drawing" /></tables>

0035Here, frequency hopping is a setting regarding whether or not to perform such hopping when communicating through a granted resource, resource block allocation indicates a granted resource, and MCS is a modulation and control scheme. Yes, TPC is terminal power control, uplink delay is the delay in transmitting through the resource, and CQI request is the channel quality indicator request. In this example, virtually any bit is borrowed to indicate NDI. For example, one bit is borrowed from the resource block allocation because typically only eight are used, and the TPC is reduced to, for example, 3 bits if the last bit is NDI and / or something like that. ..

0036In addition, the control channel is provided to facilitate the communication of channel quality information between the wireless device 302 and the wireless device 304. In one example, the control channel receive component 314 can acquire parameters for later use of the control channel. In addition, the HARQ transmit component 308 and / or the HARQ control data component 310 transmits control data to the wireless device 304 through a previously established channel. In one example, the control data is shared among multiple wireless devices, and the HARQ transmit component 308 and / or the HARQ control data component 310 includes an identifier associated with the wireless device in the control data. In one example, the identifier is a temporary identifier received in a system access response that does not include a resource grant, or more permanent or semi-permanent identifiers received in a resource grant. In addition, the wireless device 302 transmits a resource grant through the control channel. For example, after system access component 312 sends a system access request, RACH component 306 produces a response that does not include a resource grant. In this regard, the HARQ transmit component 308 and / or the HARQ control data component 310 provides resource grants through one or more control channels such as the physical downlink control channel (PDCCH) and / or such.

0037In this example, the control channel receive component 314 acquires a resource grant through the control channel and forwards the grant to the HARQ entity component 102. Thereby, the HARQ entity component 102 matches its grant to the HARQ process that sent the request. Also, the HARQ entity component 102 determines that it is a control channel transmit, at least in part based on receiving it from the control channel receive component 314. If the resource grant has a temporary identifier corresponding to the wireless device 304 (eg, an identifier received in a system access or RACH response), the HARQ entity component 102 sends the resource grant data to the HARQ process, along with an indication representing retransmission. provide. As described, the use of the temporary identifier implies that the wireless device 302 did not receive or process the system access request, as the conflict has not been resolved and the RACH procedure has not been completed. , Indicates a retransmission.

0038The resource grant has a permanent or semi-permanent identifier corresponding to the wireless device 304 (eg, an identifier received in response to the acquisition of a data control resource) and there is a running system access procedure (eg, system access component 312). Received a system access response and communicated a scheduled transmission, but did not receive a HARQ ACK for the scheduled transmission), as described, the HARQ entity component 102, along with an indication representing a new transmission, is a resource. Providing grant data to the HARQ process. In another example, the HARQ entity component 102 determines new data transmission from the indicated NDI as described. In determining whether NDI has been incremented, HARQ Entity Component 102 ignores resource grants sent through the control channel corresponding to the tentative address of wireless device 304, as described.

0039With reference to FIG. 4, FIG. 400 is provided showing exemplary communication for establishing access in a wireless network. The UE 402 and eNB 404 are provided to allow the eNB 404 to facilitate network communication with the UE 402. The UE 402 sends a random access preamble 406 to the eNB 404 to initiate communication with it. In one example, the UE 402, as described, when switching from idle mode to active mode, when recovering from a radio failure, when initiating a communication handover, when receiving data prior to data channel synchronization, And / or at such times, send a random access preamble. This is, for example, called message 1 transmission. The eNB 404 sends a random access response 408 to UE 402. This is, in one example, called message 2 transmission, random access preamble identifier, timing assignment information, UE. It may have a temporary address for 402 (which can be a permanent address after the RRC contention resolves), and / or something like that. As described, the random access response 408 includes, in one example, a resource grant. If included, the HARQ entity in UE 402 (not shown) indicates that the random access response 408 is a new transmission intended for HARQ, as described.

0040The UE 402 sends a first scheduled send 410, called a message 3 send, to the eNB 404. In one example, this transmission 410 is used to establish an RRC connection, RRC reestablishment, RRC handover, and / or such. In addition, the scheduled transmission 410 is transmitted using the resource grant or otherwise received in the random access response 408. The eNB 404 sends a conflict resolution 412 to the UE 402 in response to a scheduled transmission to resolve the RRC communication and assign a permanent or semi-permanent address to the UE 402 for later transmission. It should be recognized that the above is an example of a random access procedure utilizing the subject matter described herein to indicate that the random access response is a new transmission. In addition, another configuration, including, for example, a non-competitive-based random access procedure, is within the scope of the subject matter described herein.

0041Here, with reference to FIGS. 5-7, methodologies implemented according to the various aspects set forth herein are illustrated. For the sake of brevity, the methodology is presented and described as a series of actions, but the methodology is presented and / or presented herein in a different order, with some actions according to one or more embodiments. It should be understood and recognized that it is not limited by the order of actions, as it occurs at the same time as actions other than those described. For example, one of ordinary skill in the art will understand and recognize that the methodology is also represented as a series of correlated states or events, such as a phase diagram. Moreover, not all illustrated actions are required to implement the methodology according to one or more embodiments.

0042With reference to FIG. 5, Methodology 500 for providing HARQ support in system access and / or random access procedures is illustrated. At 502, a communication with a resource grant is received from the access point. As described, this is a random access response or another system access message, control channel transmission, and / or such. At 504, it is determined whether the communication is a new transmission or a retransmission of data, at least in part, based on the communication type. For example, if the communication is a random access response with a resource grant, as described, this indicates a new transmission. It should be recognized that the decision in 504 is also based on other factors such as temporary or permanent device addresses and / or such, as described. At 506, communication is provided to the HARQ process with indications representing new or retransmissions, based on the decision at 504. In addition, it should be recognized that the communication may include an identifier associated with the HARQ process to facilitate its association. In this regard, HARQ functionality is provided in the system access procedure.

0043With reference to FIG. 6, Methodology 600 for providing HARQ in a random access procedure is illustrated. At 602, a random access preamble is transmitted. In one example, the preamble is sent to one or more access points to facilitate the establishment of communication with it. For example, a preamble is described when switching from idle mode to active mode, recovering from a radio failure, initiating a communication handover, receiving data prior to data channel synchronization, and / or It is sent at such times. At 604, a random access response is received with the resource grant. In this regard, the response is the first response after the random access preamble, which is probably a new transmission. At 606, the random access response is eventually provided to the associated HARQ process along with a new send indicator. This happens regardless of the NDI, as described, for example, with or without a random access response.

0044FIG. 7 illustrates Methodology 700 for providing HARQ functionality in system access communications. At 702, the random access preamble is sent to one or more access points to facilitate system access, as described earlier. At 704, a control channel communication with an uplink grant directed to a temporary address is received. Since the conflict has not yet been resolved, this grant is determined to be a retransmission, which, in 706, provides a random access response to the HARQ process along with the retransmission indication.

0045Whether to indicate whether it is a new transmission or a retransmission for various system access messages regardless of the identified NDI and / or such, according to one or more aspects described herein. It will be recognized that inferences can be made in deciding whether or not. As used herein, the term "inference" or "inference" generally refers to a system, environment and / or user from a set of observations acquired through events and / or data. Or refers to the process of inferring that state. Inference can be used, for example, to identify a particular context or action, and can, for example, generate a possibility distribution across states. This reasoning can be probable. That is, the calculation of the probability distribution over the states of interest is based on the consideration of data and events. Inference also refers to the technique used to compose high-level events from a set of events and / or data. Such inference is whether the events correlate in close temporal approximations and whether the events and data are due to one or more events and data sources. It results in constructing a new event or behavior from the observed and / or stored set of event data.

0046Referencing FIG. 8 shows a system 800 that performs HARQ communication for system access procedures. For example, system 800 may be present in at least a portion of a base station, mobile device, and the like. It should be recognized that the system 800 is represented as containing a functional block, which is a functional block representing a function performed by a processor, software, or a combination thereof (eg, firmware). System 800 includes logical grouping 802 of electrical components that can work together. For example, the logical grouping 802 includes an electrical component 804 for receiving communications from the access point in response to system access requests. For example, this is a system access response (eg, RACH response), control channel communication, and / or such. In addition, the logical grouping 802 includes electrical components 806 for providing communications to the HARQ process, along with indications representing new or retransmissions that are determined at least in part based on the type of communication. As described, a random access response with a resource grant is a new transmission, and a control channel transmission with a grant is a retransmission directed to a pseudo address and / or such.

0047In addition, the logical grouping 802 includes an electrical component 808 for determining the address associated with the device identified in the communication. As such, the address is tentative or permanent and is used to further determine whether the communication should be presented as a new transmission or a retransmission, as previously described. In addition, system 800 includes memory 810 that stores instructions for performing functions associated with electrical components 804, 806, and 808. Although shown as being outside memory 810, it should be understood that one or more of the electrical components 804, 806, and 808 can be inside memory 810.

0048FIG. 9 is a block diagram of another system 900 that can be used to implement various aspects of the functionality described herein. In one example, system 900 includes mobile terminal 902. As shown, mobile terminal 902 receives signals from one or more base stations 904 through one or more antennas 908 and transmits them to one or more base stations 904. In addition, the mobile terminal 902 includes a receiver 910 that receives information from the antenna 908. In one example, the receiver 910 is operationally associated with a demodulator (Demod) 912 that demodulates the received information. The demodulated symbols are then analyzed by processor 914. Processor 914 is coupled to memory 916, which can store data and / or program code associated with mobile terminal 902. In addition, mobile terminal 902 uses processor 914 to perform methodologies 500, 600, 700 and / or another similar suitable methodology. The mobile terminal 902 also uses one or more of the components described in the previous figure to achieve the described functionality. For example, the component is implemented by processor 914. The mobile terminal 902 also includes a modulator 918 capable of multiplexing signals for transmission through antenna 908 by transmitter 920.

0049With reference to FIG. 10, illustrations of wireless multiple access communication systems are provided according to various aspects. In one example, the access point 1000 (AP) includes multiple antenna groups. As shown in FIG. 10, one antenna group contains antennas 1004 and 1006, another antenna group contains antennas 1008 and 1010, and another antenna group contains antennas 1012 and 1014. Although only two antennas are shown in FIG. 10 for each antenna group, it should be recognized that more or fewer antennas may be available for each antenna group. In another example, the access terminal 1016 communicates with the antennas 1012 and 1014. Here, the antennas 1012 and 1014 transmit information to the access terminal 1016 through the forward link 1020 and receive information from the access terminal 1016 through the reverse link 1018. In addition, and / or, access terminal 1022 communicates with antennas 1006 and 1008. Here, the antennas 1006 and 1008 transmit information to the access terminal 1022 through the forward link 1026 and receive information from the access terminal 1022 through the reverse link 1024. In frequency division multiplexing systems, communication links 1018, 1020, 1024, and 1026 use different frequencies for communication. For example, the forward link 1020 uses a different frequency than that used by the reverse link 1018.

0050Each group of antennas and / or areas designed to communicate with them are called access point sectors. According to one aspect, the antenna group is designed to communicate with the access terminal in one sector of the area covered by the access point 1000. In communication through forward links 1020 and 1026, the transmitting antenna of access point 1000 can utilize beamforming to improve the signal-to-noise ratio of forward links for different access terminals 1016 and 1022. Also, access points that use beamforming to send to randomly scattered access terminals during their coverage have less interference than adjacent cells that send to all of their access terminals through a single antenna. Cause to the access terminal inside.

0051An access point (eg, an access point 1000) is a fixed station used to communicate with multiple terminals, which is referred to as a base station, eNB, access network, and / or another appropriate term. In addition, access terminals (eg, access terminals 1016 or 1022) are also referred to as mobile terminals, user devices, wireless communication devices, terminals, wireless terminals, and / or in other appropriate terms.

0052With reference to FIG. 11, a block diagram showing an exemplary wireless communication system 1100 in which the various aspects described herein work is provided. In one example, system 1100 is a multiple input multiple output (MIMO) system that includes transmitter system 1110 and receiver system 1150. However, the transmitter system 1110 and / or the receiver system 1150 also has, for example, multiple transmitting antennas (eg, on a base station) with one or more symbol streams on a single antenna device (eg, on a mobile station). It should be recognized that it can be applied to multiple input single output systems that can be transmitted to. In addition, it should be recognized that aspects of the transmitter system 1110 and / or receiver system 1150 described herein may be utilized in connection with a single output single input antenna system.

0053According to one aspect, traffic data for a large number of data streams is provided from the data source 1112 to the transmit (TX) data processor 1114 in transmitter system 1110. In one example, each data stream is then transmitted via its respective transmit antenna 1124. In addition, the TX data processor 1114 formats and encodes the traffic data for each data stream based on the specific coding scheme selected for each of the respective data streams in order to provide the encoded data. Can be converted and interleaved. In one example, the encoded data for each data stream is then multiplexed with pilot data using OFDM technology. Pilot data is, for example, a known data pattern that is processed in a known way. In addition, the pilot data is used in receiver system 1150 to estimate the channel response. Returning to transmitter system 1110, the pilot and coded data multiplexed for each data stream will have a specific modulation scheme (eg, for example) selected for each of the respective data streams to provide modulation symbols. , BPSK, QSPK, M-PSK, or M-QAM) to be modulated (ie, symbol map). In one example, the data rate, encoding, and modulation for each data stream is performed on processor 1130 and / or is determined by instructions provided by processor 1130.

0054Modulation symbols for all data streams are then provided to the TX processor 1120, which further processes the modulation symbols (eg, for OFDM). The TX MIMO processor 1120 is then N_TN modulated symbol streams_TProvided to one transceiver 1122a ~ 1122t. In one example, each transceiver 1122 receives and processes its own symbol stream to provide one or more analog signals. Each transceiver 1122 then further tunes (eg, amplifies, filters, and upconverts) the analog signal to provide a modulated signal suitable for transmission over MIMO channels. Therefore, N from transceivers 1122a ~ 1122t_TThe modulated signals are then N_TIt is transmitted from each of the antennas 1124a to 1124t.

0055According to another aspect, the transmitted modulated signal is N_RIt is received by the receiver system 1150 by the antennas 1152a to 1152r. The received signal from each antenna 1152 is then provided to transceiver 1154, respectively. In one example, each transceiver 1154 tunes (eg, filters, amplifies, and downconverts) its received signal, digitizes the tuned signal to provide a sample, and then the corresponding "receive" symbol. Process the sample to serve the stream. RX MIMO / Data Processor 1160 then N_TBased on specific receiver processing techniques to provide an individual "detection" symbol stream, N_RN receive symbol streams_RReceive and process from one transceiver 1154. In one example, each of the detected symbol streams contains a symbol that is an estimate of the modulated symbol transmitted to the corresponding data stream. The RX processor 1160 then processes each symbol stream by demodulating, deinterleaving, and decoding each of the detected symbol streams in order to recover traffic data for the corresponding data stream. Thereby, the processing by the RX processor 1160 is complementary to the processing performed by the TX MIMO processor 1120 and the TX data processor 1116 in the transmitter system 1110. The RX processor 1160 also provides the processed symbol stream to the data sink 1164.

0056According to one aspect, the channel response estimation produced by the RX processor 1160 performs spatial / temporal processing at the receiver, adjusts the power level, modifies the modulation rate or scheme, and / or performs another appropriate operation. Used to do. In addition, the RX processor 1160 further estimates channel characteristics such as signal-to-noise / signal-to-noise ratio (SNR) of the detected symbol stream, for example. The RX processor 1160 then provides the estimated channel characteristics to processor 1170. In one example, RX processor 1160 and / or processor 1170 further derives an estimate of "operating" SNR for the system. Processor 1170 then provides channel estimation information (CSI) with information related to communication links and / or received data streams. This information includes, for example, the operating SNR. The CSI is then processed by the TX data processor 1118, modulated by the modulator 1180, tuned by transceivers 1154a to 1154r, and transmitted to transmitter system 1110. In addition, data source 1116 in receiver system 1150 can provide additional data to be processed by TX data processor 1118.

0057Returning to transmitter system 1110, the modulated signal from receiver system 1150 is then received by antenna 1124, tuned by transceiver 1122, demodulated by demodulator 1140, and further reported by receiver system 1150. Is processed by the RX data processor 1142 to recover. In one example, the reported CSI is then provided to processor 1130 and used to determine the data rate and coding and modulation scheme to be used for one or more data streams. The determined coding and modulation scheme is then provided to transceiver 1122 for quantization and / or for later transmission to receiver system 1150. In addition, and / or, the reported CSI is used by processor 1130 to generate various controls for TX data processor 1114 and TX MIMO processor 1120. In another example, the CSI and / or other information processed by the RX data processor 1142 is provided to the data sink 1144.

0058In one example, processor 1130 in transmitter system 1110 and processor 1170 in receiver system 1150 direct operations to their respective systems. In addition, memory 1132 in transmitter system 1110 and memory 1172 in receiver system 1150 provide storage for program code and data used by processors 1130 and 1170, respectively. In addition, in the transmitter system 1150, various processing techniques are N_RProcess N received signals_TUsed to discover a stream of transmitted symbols. These receiver processing technologies include space and space-time receiver processing technologies, also known as equalization technologies and / or "successive nulling / equalization and interference cancellation" receiver processing technologies. .. It is also referred to as "successive interference cancellation" or "successive cancellation" receiver processing technology.

0059It should be understood that the embodiments described herein are implemented by hardware, software, firmware, middleware, microcode, or any combination thereof. When the system and / or method is implemented in software, firmware, middleware or microphone code, program code or code segment, they are stored in machine readable media such as storage components. A code segment represents a procedure, function, subprogram, program, routine, subroutine, module, software package, class, or any combination of instructions, data structures, or program statements. A code segment can be coupled to another code segment or hardware circuit by transmitting and / or receiving information, data, arguments, parameters or memory content. Information, arguments, parameters, data, etc. may be transmitted, transferred, or transmitted using any suitable means, including memory sharing, message passing, token passing, network transmission, and the like.

0060For software implementation, the techniques described herein can be performed in modules (eg, procedures, functions, etc.) that perform the functions described herein. The software code is stored in the memory unit and executed by the processor. The memory unit is implemented inside or outside the processor, in which case it is communicatively coupled to the processor via various means well known in the art.

0061What has been described above includes examples of one or more embodiments. Of course, not all possible combinations of components or methodologies can be described for the purposes of describing the aforementioned embodiments, but those skilled in the art will appreciate that more combinations and replacements of the various embodiments are possible. Can be recognized. Accordingly, the described embodiments are intended to include all such alternatives, modifications, and changes contained within the spirit and scope of the appended claims. Further, as long as the term "contains" is used in either the detailed description of the invention or in the claims, such term is the term "preparing" ("preparing" is a transfer term when used in the claims. It is intended to be inclusive in the same way as (interpreted as). Further, the term "or" as used in the detailed description or claim of the invention means "non-exclusive or".