KR101110989B1 - Control signal transmission for wireless communication systems - Google Patents

Abstract

Systems and methods are presented that facilitate the communication of reverse link control information over an OFDMA control channel (s) and a CDMA control channel (s). Dedicated OFDMA control channel resources may be allocated to the mobile device (s). Control information related to one or more logical control channels may be generated by the mobile device. In addition, the physical control channel type (eg, OFDMA control channel or CDMA control channel) may be selected for transmitting control information on the reverse link. For example, control information associated with periodic logical control channels may be multiplexed and transmitted on an OFDMA control channel (eg, using dedicated OFDMA control channel resources), while control information related to non-periodic logical control channels May be transmitted on the CDMA control channel.

Description

CONTROL SIGNAL TRANSMISSION FOR WIRELESS COMMUNICATION SYSTEMS}

This application is a partial consecutive application of US Patent Application Serial No. 11 / 944,123, entitled "CONTROL SIGNAL TRANSMISSION FOR WIRELESS COMMUNICATION SYSTEMS," filed November 21, 2007, which filed "December 1, 2006." Claims the advantages of US Provisional Patent Application Serial No. 60 / 868,270 entitled "CONTROL SIGNAL TRANSMISSION FOR WIRELESS COMMUNICATION SYSTEMS." All of the foregoing applications are incorporated herein by reference.

The following description relates generally to wireless communication, and more particularly to the use of OFDMA control channels and CDMA control channels for transmitting control information in a wireless communication system.

Wireless communication systems are widely deployed to provide various types of communication; For example, voice and / or data may be provided via such wireless communication systems. Typical wireless communication systems or networks may provide multiple user access to one or more shared resources (eg, bandwidth, transmit power,...). For example, a system may use various multiple access techniques such as frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM), orthogonal frequency division multiplexing (OFDM), and the like.

In general, wireless multiple-access communication systems can simultaneously support communication for multiple mobile devices. Each mobile device can communicate with one or more base stations via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the base stations to the mobile devices, and the reverse link (or uplink) refers to the communication link from the mobile devices to the base stations.

Wireless communication systems often use one or more base stations that provide a coverage area. A typical base station may transmit multiple data streams for broadcast, multicast and / or unicast services, which may be a stream of data that may be an independent reception interest for the mobile device. . A mobile device within the coverage area of such a base station can be used to receive one, more than one, or all data streams delivered in a composite stream. Likewise, a mobile device can transmit data to a base station or other mobile device.

OFDM based techniques effectively partition the overall system bandwidth into multiple orthogonal subcarriers. Such subcarriers may also be referred to as tones, bins, and frequency channels. Each subcarrier can be modulated with data. In time division based techniques, each subcarrier may comprise a portion of sequential time slices or time slots. One or more time slot and subcarrier combinations may be provided to each user for transmitting and receiving information in a defined burst period or frame. Hopping schemes may generally be symbol rate hopping or block hopping.

Code division based techniques typically transmit data over a number of frequencies available at any time in a range. In general, data is digitized and spread over available bandwidth, where multiple users can be overlayed on a channel and each user can be assigned a unique sequence code. Users can transmit in the same broadband chunk of spectrum, and each user's signal is spread over the entire bandwidth by its respective unique spreading code. This technique can provide sharing, and one or more users can transmit and receive simultaneously. Such sharing can be achieved through spread spectrum digital modulation, where the user's stream of bits is encoded and spread over a wide channel in a pseudo-random manner. The receiver is designed to recognize the associated unique sequence code and performs randomization to collect bits for a particular user in a coherent manner.

Typically, in conventional systems, the reverse link control channels tend to be CDMA control channels. However, when multiple periodic channels per user are used, the overhead associated with CDMA control channels can be quite large. Thus, these conventional techniques may receive limited capacity when multiple periodic channels per user are supported.

The following provides a simplified summary of such embodiments in order to provide a basic understanding of one or more embodiments. This summary is not an extensive overview of all contemplated embodiments and is not intended to identify key or critical components of all embodiments or to describe any or all categories of embodiments. Its sole purpose is to present some concepts of one or more embodiments in a simplified form as a prelude to the more detailed description that is presented later.

In accordance with one or more embodiments and the corresponding disclosure, various aspects are described in conjunction with facilitating communication of reverse link control information over an OFDMA control channel (s) and a CDMA control channel (s). Dedicated OFDMA control channel resources may be allocated to the mobile device (s). Control information related to one or more logical control channels may be generated by the mobile device. In addition, a physical control channel type (eg, an OFDMA control channel or a CDMA control channel) may be selected for transmitting control information over the reverse link. For example, control information associated with periodic logical control channels can be multiplexed and transmitted (eg, using dedicated OFDMA control channel resources) on an OFDMA control channel, while non-periodic Logical control channels may be transmitted on the CDMA control channel.

In accordance with related aspects, a method for facilitating control information transmission on a reverse link in a wireless communication system is described herein. The method may include generating control information to be communicated on a reverse link. The method may also include selecting a physical control channel type for transmitting control information as a function of control information. Moreover, the method may include transmitting control information on a selected type of physical control channel.

Another aspect relates to an apparatus operating in a wireless communication system. The apparatus includes at least one processor configured to generate control information to be transmitted on the reverse link, select a physical control channel type for transmitting the control information as a function of the control information, and transmit the control information on the selected type of physical control channel. It may include. In addition, the apparatus may include a memory coupled to at least one processor.

Another aspect relates to a wireless communication device that enables communication of control information on a reverse link in a wireless communication environment. The wireless communications apparatus can include means for generating a control message related to a reverse link logical control channel. The wireless communications apparatus can also include means for selecting a physical control channel type for transmitting the control message as a function of the control message. Moreover, the wireless communication device can include means for transmitting the control message on the selected physical control channel type.

Another aspect relates to a computer program product that may include a computer-readable medium, the computer-readable medium for causing at least one computer to generate a control message related to a reverse link logical control channel. code; Code for causing the at least one computer to select a physical control channel type for transmitting the control message as a function of the control message, wherein the physical control channel type is one of an OFDMA control channel or a CDMA control channel; And code for causing the at least one computer to transmit the control message over the selected physical control channel type.

In accordance with other aspects, a method is described herein that facilitates control data acquisition over a reverse link control channel. The method may include allocating OFDMA resources to a mobile device to communicate one or more periodic reverse link logical control channels. Moreover, the method can include regulating minimum average rates for the mobile device to transmit one or more periodic reverse link logical control channels in the allocated OFDMA resources. The method may also include receiving multiplexed data via allocated OFDMA resources, the multiplexed data comprising at least one subset of one or more periodic reverse link logical control channels.

Another aspect relates to an apparatus operating in a wireless communication system. The apparatus allocates OFDMA control channel resources to the mobile device for use in one or more periodic reverse link logical control channels, and obtains minimum average rates for the mobile device to communicate reports related to the one or more periodic reverse link logical control channels. And adjust at least one processor configured to obtain multiplexed data on the allocated OFDMA control channel resources, the multiplexed data comprising reports related to at least one subset of the one or more periodic reverse link control channels. In addition, the apparatus may include a memory coupled to at least one processor.

Another aspect relates to a wireless communication apparatus that enables allocation of reverse link OFDMA control channel resources in a wireless communication environment. The wireless communications apparatus can include means for assigning dedicated resources to a mobile device. The wireless communications apparatus can also include means for adjusting minimum average rates for reporting control information related to one or more reverse link logical control channels. Moreover, the wireless communication apparatus can include means for obtaining multiplexed data via allocated dedicated resources, the control information relating to at least one subset of one or more reverse link logical control channels.

Another aspect relates to a computer program product that may include a computer-readable medium, the computer-readable medium comprising code for causing at least one computer to allocate dedicated resources to a mobile device; Code for causing the at least one computer to adjust minimum average rates to report control information related to one or more reverse link logical control channels; And code for receiving multiplexed data on the allocated dedicated resources, the multiplexed data comprising control information related to at least one subset of the one or more reverse link logical control channels.

To the accomplishment of the foregoing and related ends, the one or more embodiments comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more embodiments. These aspects are indicative, however, of but a few of the various ways in which the principles of various embodiments may be employed and the embodiments presented are intended to include all such aspects and their equivalents.

1 illustrates a wireless communication system in accordance with various aspects set forth herein.
2 shows an example of a system that enables communication of control information on a reverse link over an OFDMA dedicated control channel (s) and a CDMA control channel (s).
3 shows an example of a forward link frame for a multiple access wireless communication system.
4 illustrates an example of a reverse link frame for a multiple access wireless communication system.
5 shows an example of an OFDM control channel.
6 shows an example of various pilot symbols used for OFDM control channels.
7 illustrates a binary channel tree used in conjunction with the various aspects described herein.
8 shows an example of a method for facilitating the assignment of control messages to an appropriate reverse link control channel.
9 illustrates an example of a method for facilitating transmission of control information on a reverse link in a wireless communication system.
10 illustrates an example of a method for facilitating acquisition of control data via an OFDMA control channel in a wireless communication system.
11 illustrates an example of a mobile device that facilitates the use of various types of physical control channels in a wireless communication system.
12 illustrates an example of a system that facilitates allocation of OFDMA control channel resources to mobile device (s) in a wireless communication environment.
13 illustrates an example of a wireless network environment that may be used in conjunction with the various systems and methods presented herein.
14 illustrates an example of a system that enables communication of control information over a reverse link in a wireless communication environment.
15 illustrates an example of a system that enables allocation of reverse link OFDMA control channel resources in a wireless communication environment.

Various embodiments are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment (s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

As used in this application, the terms “component”, “module”, “system” and the like are intended to refer to hardware, firmware, a combination of hardware and software, software, or executable software as a computer-related entity. . For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and / or thread of execution and a component can be distributed among two or more computers and / or localized on one computer. In addition, these components can execute from various computer readable media having various data structures stored thereon. Components from one component interacting with another component, for example in one or more data packets (e.g. in a local system, distributed system, and / or in a network such as the Internet interacting with other systems by signal) Data may be communicated by local and / or remote processes.

Moreover, various embodiments are described in the context of a mobile device. A mobile device may be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, access terminal, user terminal, terminal, wireless communication device, user agent, user device, or user equipment (UE). . Mobile devices include cellular telephones, cordless telephones, session initiation protocol (SIP) telephones, wireless local loop (WLL) stations, personal digital assistants (PDAs), portable devices with wireless connectivity, computing devices, or wireless modems. It may be another processing device connected to it. Moreover, various embodiments are described in conjunction with a base station. The base station may be used for communicating with the mobile device (s) and may be referred to as an access point, Node B, or some other terminology.

In addition, the various aspects or features presented herein may be embodied in a method, apparatus, or article of manufacture using standard programming and / or engineering techniques. The term “article of manufacture” is intended to include a computer program, carrier, or media accessible from any computer readable device. For example, computer readable media may include magnetic storage devices (eg, hard disks, floppy disks, magnetic strips, etc.), optical disks (eg, CDs, DVDs, etc.), smart cards, and flash memory devices. (Eg, EEPROM, card, stick, key drive, etc.), but is not limited to these. In addition, various storage media presented herein include one or more devices and / or other machine-readable media for storing information. The term “machine-readable medium” includes, but is not limited to, wireless channels and various other media capable of storing, holding, and / or delivering command (s) and / or data.

Referring to FIG. 1, a wireless communication system 100 in accordance with various embodiments presented herein is shown. System 100 includes a number of base stations 110 and a number of mobile devices 120. Base station 110 is a base station that communicates with one or more mobile devices 120. Base station 110 may also be referred to as an access point, Node B, and / or some other network entity, and may include some or all of their functionality. Each base station 110 provides communication coverage for a particular geographic area 102. The term "cell" may refer to base station 110 and / or its coverage area 102 depending on the context in which the term is used. In order to improve the capacity of the system 100, the base station coverage area 102 may be divided into a number of small areas (eg, three small areas 104a, 104b, 104c). Each small region 104 is served by a respective base transceiver subsystem (BTS). The term “sector” may refer to a BTS and / or its coverage area depending on the context in which the term is used. For a sectorized cell, the BTSs for all sectors of that cell are typically co-located within the base station for the cell. The signaling transmission techniques presented in the present invention can be used for a system of unsectored cells as well as a system of sectorized cells. For simplicity, in the following description, the term “base station” is used generically for base stations serving sectors as well as base stations serving cells.

Mobile devices 120 are typically distributed across system 100, with each mobile device 120 being stationary or mobile. Mobile device 120 may also be referred to as a mobile station, user equipment, and / or some other apparatus, and may include some or all of their functionality. Mobile device 120 may be a wireless device, a cellular phone, a personal digital assistant (PDA), a wireless modem card, or the like. Mobile device 120 may communicate with zero, one, or multiple base stations 110 on the forward and reverse links at any given time.

In a centralized architecture, system controller 130 is coupled to base station 110 and provides control and coordination to these base stations 110. System controller 130 may be a single network entity or a collection of network entities. In a distributed architecture, the base stations 110 may communicate with each other as needed.

The controller 130 is from and / or mobile devices 120 in communication with multiple networks (eg, the Internet, other packet based networks, base stations 110 of the multiple access wireless communication system 100). One or more connections to circuit switched voice networks providing information to 120. Controller 130 may include and / or be coupled with a scheduler that schedules transmissions from and / or to mobile devices 120. Additionally or alternatively, the scheduler may reside in each individual base station 110, sectors of cells, and the like.

In order to communicate control information from mobile devices 120 to base stations 110, one of two different types of physical layer channelization may be used. One type of physical layer channelization is CDMA channelization, where multiple mobile devices 120 have different orthogonalization codes, or codes, at the same or partially overlapping time and frequency resources for transmission. Use groups of Another type of physical layer channelization is OFDM orthogonalization, in which specific assignments of time and frequency subcarriers are assigned to the mobile device 120, and certain assignments of time and frequency subcarriers are performed in some time period (e.g., frame or slot). Is different from the time and frequency subcarriers assigned to any other mobile device 120. In some aspects, different types of control information are assigned to different physical layer channels and are thus scheduled on different physical layer channels.

1 shows physical sectors (eg, having different antenna groups for different sectors), it should be noted that other methods may be used. For example, the use of multiple fixed "beams" each covering different regions of a cell in frequency space may be used in place of or in combination with physical sectors.

In some aspects, the forward link transmission is divided into units of superframes. The superframe may include a series of frames after the superframe preamble. In an FDD system, reverse link and forward link transmissions may occupy different frequency bandwidths such that transmission on the links does not overlap or overlap most of the frequency subcarriers. In a TDD system, N forward link frames and M reverse link frames define the number of sequential forward link and reverse link frames that can be transmitted continuously before allowing the transmission of the opposite type of frame. It should be noted that the number of N and M may vary within a given superframe or may vary between superframes.

In FDD and TDD systems, each superframe may include a superframe preamble. In certain embodiments, the superframe preamble can include a pilot channel that includes pilots that can be used for channel estimation by mobile devices 120, and demodulate information that mobile devices 120 carry on a forward link. It contains a broadcast channel containing configuration information that can be used. In addition, additional acquisition information such as timing and other information sufficient for mobile device 120 to communicate and basic power control or offset information may be included in the superframe preamble. In other cases, only some of the above information and / or other information may be included in this superframe preamble.

In certain aspects, the broadcast information may include information or allocation of any OFDMA control channels. This information can be used to prevent transmission of reverse link data transmissions in those channels or locations that are allocated to OFDMA control channels, even if the same channel or location is assigned to mobile device 120 for reverse link data transmission. May be used by 120.

With reference to FIG. 2, illustrated is a system 200 capable of communicating control information on a reverse link via OFDMA dedicated control channel (s) and CDMA control channel (s). System 200 includes a base station 202 in communication with a mobile device 204. In addition, it is contemplated that base station 202 may communicate with any number of different mobile device (s) (not shown).

Base station 202 includes a resource reserver 206, a resource allocator 208, and a report regulator 210. The resource reserveer 206 can reserve resources across the system, so that in a wireless communication environment, the base station (s), mobile device (s), various network device (s), etc., have a common understanding of these resources being reserved. Can be. For example, the resource reserveer 206 may enable the reverse link dedicated OFDMA control channel (R-ODCCH) segments to be reserved. The R-ODCCH segments will then be used by the mobile device 204 and / or any different mobile devices to transmit various periodic feedback channels to the base station 202 (and / or any different base station (not shown)). Can be. Resource reservation 206 may enable R-ODCCH resources to be allocated to units of two R-DCH channels on any reverse link (RL) interlace. Accordingly, second order diversity may be provided for each R-ODCCH segment. In addition, a granularity of ~ 6.6% per interlace or -0.83% per system width can be calculated. Moreover, four R-ODCCH segments may be accommodate by using such allocation by resource reserveer 206. According to another example, the resource reserveer 206 may allocate R-ODCCH segments in units of 16 channels. According to another example, the resource reserveer 206 may use R-ODCCH puncturing R-DCH resources, thus assigning dedicated logical resources (eg, channel tree nodes) to the R-ODCCH. Instead, the R-ODCCH tiles may hop across R-DCH tiles corresponding to different traffic nodes. Thus, the total number of traffic channels need not be reduced by the introduction of the R-ODCCH (eg, VoIP capacity may not be affected). However, all channels can sometimes be punctured, which can lead to a rate reduction. According to another example, the resource reserveer 206 can reserve channel nodes to allocate R-ODCCH resources. Although shown as being included in base station 202, resource reserveer 206 may additionally or alternatively be a system controller (eg, system controller 130 of FIG. 1), different base station (s), one or more nodes of the network, and the like. May be included.

The resource allocator 208 may choose to assign specific reserved resource (s) (eg, dedicated R-ODCCH segments,…) to selected users (eg, mobile device 204, different mobile device (s),…). Can be. Moreover, the resource allocator 208 may individually allocate specific reserved resource (s) via higher layer signaling of allocation messages. The dedicated R-ODCCH segment may be assigned and / or deallocated to the mobile device 204 (or different mobile device) within the forward link serving sector (FLSS) associated with the base station 202, but the R-ODCCH segment (s) Takes into account that it may be allocated and / or deallocated by the reverse link serving sector (RLSS). For example, message-based allocation or deallocation per mobile device may be used by the resource allocator 208. Moreover, the resource allocator 208 may notify the sector-wide reservation of the R-ODCCH resources of the 16 segments of units on the broadcast channel. In addition, the resource allocator 208 may deliver allocation messages specifying information related to the R-ODCCH segment ID, interlace index, R-ODCCH periodicity and phase, and the like within the interface. According to an example, multiple mobile devices (eg, mobile device 204 and / or different mobile device (s)) are the same (segment ID, interlace) when each of these multiple mobile devices are assigned to different phases. It can be multiplexed in pairs. Moreover, R-ODCCH resources may be preallocated by any sector in the active set of the mobile device (eg, mobile device 204), which allows the mobile device to initiate feedback transmission upon handoff. You can enable it.

Mobile device 204 may be assigned reserved resources (eg, an R-ODCCH segment); Multiple logical channels may be multiplexed for reserved resources (eg, an allocated R-ODCCH segment may be used to multiplex different logical channels for it). Report coordinator 210 of base station 202 may provide a minimum average rate at which each periodic report may be provided for reserved resources. Thus, report adjuster 210 does not need to specify the particular reports that are combined in a particular control segment. Instead, report adjuster 210 may send information controlling the minimum average rate, where each of a number of different reports is communicated from mobile device 204 at the minimum average rate. Mobile device 204 can consider such information when selecting reports that are combined to meet minimum average rate requirements as described below. According to another example, report adjuster 210 may send information controlling the average rate for each report, where the average rate may be a fixed number of reports per particular time period.

The mobile device 204 can further include a report generator 212, a control channel selector 214, and a report multiplexer 216. The report generator 212 may use the minimum average rate information to select the reports that are calculated. The reports can provide feedback from the mobile device 204 to the base station 202. Moreover, reports can be communicated via a logical control channel. According to an example, a payload of an allocated reservation resource (eg, R-ODCCH) may carry multiplexed logical channel (s).

For example, the control channels are reverse link wideband channel quality indicator channel (r-cqich), reverse link subband feedback channel (r-sfch) capable of subband scheduling, reverse link for closed loop beamforming. Precoding feedback and SDMA channel (r-bfch), single codeword reverse link MIMO channel quality indicator channel (scw r-mqich), multi-codeword reverse link MIMO channel quality indicator channel (mcw r-mqich And / or a reverse link request channel (r-reqch) that may request RL resource allocation from the RL serving base station. Additional control channels include reverse link pilot channel (r-pich), r-pahch representing mobile device power headroom for r-pitch power, r-psdch representing relative channel strength to non-serving base stations Handoff r-cqich providing channel quality reports sent to the forward link server, handoff r-reqch providing reverse link resource requests sent to the targeted reverse link server, and access for random access and access based handoff It may include r-ach, which may be a channel.

The control channel selector 214 can select the type of control channel for communicating the report containing the control information. For example, control channel selector 214 can transmit a first subset of reports over an OFDM control channel and a second subset of reports over a CDMA control channel. Control channel selector 214 may use dedicated OFDMA control segments, for example, to transmit periodic feedback channels. Thus, if mobile device 204 has r-cqich, r-reqch, r-psdch and r-pahch feedback channels, such mobile device 204 need not have a dedicated OFDMA segment, and the CDMA control channel is controlled. May be selected and used by channel selector 214. However, the control channel selector 214 can choose to use an OFDM control channel for r-mqich, r-sfch, r-bfch, r-cqich, and r-reqch, whereby these channels are selected as control channel selector ( By using 214 can be transmitted on the OFDM control channel rather than the CDMA control channel. In addition, the control channel selector 214 may allow r-reqch to be sent in the CDMA control segment even when the OFDMA segment is available because the latency associated with the requests may be reduced. Moreover, control channel selector 214 can allow r-pich, r-ach as well as r-cqich and r-reqch transmitted to non-forward link serving sectors to be communicated on CDMA control segments.

Report multiplexer 216 may multiplex various logical channels in the allocated reservation resources (eg, R-ODCCH segment (s)). Report multiplexer 216 may combine multiple control channels into dedicated OFDMA segments for transmission to base station 202. Thus, individual payloads can be combined to minimize pilot overhead.

Report multiplexer 216 may use a maximum payload of 22 bits for various combinations of channels. A minimum header of 3 bits may also be used by the report multiplexer 216. The table below shows various combinations of channels and corresponding header values.

Control segment selector 214 and report multiplexer 216 may enable the request channels to be multiplexed on the OFDM control channels. R-reqch multiplexing on the R-ODCCH can alleviate CDMA control segment loading upon congestion and / or service delay caused by the reverse link serving sector. The mobile device 204 (eg, through the use of the control channel selector 214) can use the R-ODCCH segment available within a certain delay from the arrival of the request, where the delay is configured by the base station 202. It may be configurable. Moreover, mobile device 204 (eg, through the use of control channel selector 214) may use r-reqch for the CDMA control segment if the R-ODCCH is not available within the specified delay. As described above, the short wait time of the initial request may be enabled with a tradeoff between R-ODCCH and CDMA sub-segment congestion for r-reqch.

According to another example, the mobile device 204 forwards the r-cqich on the CDMA control channel when the segment for the R-ODCCH segment is received (eg, from the resource allocator 208 of the base station 202). Transmission can be terminated. When assigning the R-ODCCH segment to the mobile device 204, the base station 202 can continuously search for the r-cqich communicated on the assigned R-ODCCH and through the CDMA segments until the R-ODCCH is detected. have. Similar logic can also be applied for deallocation of the R-ODCCH.

Power control on the R-ODCCH may be similar to R-ACKCH power control. For example, r-pich may be used as a reference level when the forward link serving sector FLSS matches the reverse link serving sector RLSS. Thus, fast closed loop power control can be based on f-pcch commands. In addition, f-pqich reports from FLSS can be used when FLSS is different from RLSS. Thus, slow closed loop power control may be supported based on filtered pilot strength reports. Moreover, filtered f-iotch reports may be leveraged from FLSS to adjust the level of interference observed in the OFDMA segment. In addition, the user specific offset assigned via the active set update message may be applied to provide slow adjustments to user-specific channel conditions. Moreover, sector (FLSS) specific offsets can be notified on broadcast channels (e.g., ECI), and then applied to provide slow regulation based on sector-specific interference over Termal (IoT) tail behavior. Can be.

According to another example, the CDMA control sub-segment size may be 1.25 MHz, but the subject matter is not so limited. Moreover, the CDMA control channel can provide gains in the case of event-driven channels with slow average duty cycle and slow latency requirements. In addition, an OFDMA control channel can provide gains for periodic channels. OFDMA channelization of periodic channels may yield a non-negligible savings of overhead when the number and / or frequency of periodic channels is high (eg, when FLSS uses subband scheduling, precoding, MIMO,…, etc.). have. Thus, an OFDMA control channel design may provide an advantage of at least twice the capacity, for example, over CDMA for periodic channels. Moreover, efficient multiplexing of periodic channels in single-input single-output (SISO), SCW and MCW modes can be calculated.

3 and 4, frames for a multiple access wireless communication system are shown. 3 shows a forward link frame 302 and FIG. 4 shows a reverse link frame 402. Each frame 302, 402 may include the same or different number of OFDM symbols, which may constitute multiple subcarriers that may be used simultaneously for transmission for some defined period. In addition, each frame 302, 402 may operate according to a symbol rate hopping mode or a block hopping mode, in which one or more non-contiguous OFDM symbols are selected in a forward link or a symbol rate hopping mode. Assigned to a user on the reverse link, and in block hopping mode, users hop within a block of OFDM symbols. Actual blocks or OFDM symbols may or may not be hopped between frames.

One or more forward link frames 302 and / or reverse link frames 402 may each be part of one or more superframes. Each forward link frame 302 includes control channels 304-310. Each of the control channels 304-310 may be, for example, acquired; Acknowledgments; Forward link assignments for each mobile device, which may be different or the same for broadcast, multicast and unicast message types; Reverse link power control for each mobile device; And information about functions related to reverse link acknowledgments. It should be noted that more or less such functions may be supported for the control channels 304-310. In addition, the control channels 304-310 may hop in each frame according to hopping sequences that are the same as or different from the hopping sequences assigned to the data channels.

Further, each reverse link frame 402 can include one or more reverse link control channels 404 that can include feedback channels, pilot channels for reverse link channel estimation, and acknowledgment channels that can be included in reverse link transmission. -410). Each reverse link control channels 404-410 may comprise, for example, forward link and reverse link resource requests by each mobile device; Channel information (eg, channel quality information (CQI)) for different types of transmissions; And information about functions related to pilots from mobile devices that may be used by a base station for channel estimation purposes. It should be noted that more or less such functions may be provided in the control channels 404-410. In addition, reverse link control channels 404-410 may hop in each frame according to hopping sequences that are the same as or different from the hopping sequences assigned to the data channels.

In certain aspects, one or more orthogonal codes, scrambling sequences, and the like, are used to multiplex users on reverse link control channels 404-410 so that the reverse link control channels 404-410 may be used. Different types of information transmitted and / or each user may be separated. Such orthogonal codes may be assigned or user specified to each mobile device by a base station per communication session or per shorter period (eg, per superframe).

In other aspects, some reverse link control channels 404-410 may be orthogonal resources assigned one or more users in terms of subcarriers and OFDM symbols as OFDMA control channels, while other The control channels 404-410 are CDMA control channels, which are subcarriers and OFDM symbols of the same resources to which multiple users are allocated, but the users have different orthogonal codes, scrambling sequences, and the like.

Referring again to FIG. 3, aspects of a forward link frame 302 for a multiple access wireless communication system are shown. As shown, each forward link frame 302 is further divided into a number of segments. The first control channel, which may or may not include an adjacent group of subcarriers, has a variable number of subcarriers allocated according to the desired amount of control data and other considerations. The remaining portions 312 are generally available for data transmission. The control channel may include one or more pilot channels 304, 306. In symbol rate hopping mode, pilot channels 304 and 306 may be represented by all OFDM symbols in each forward link frame 302 and need not be included in the control channel in such examples. In both cases, signaling channel 308 and power control channel 310 may be included in the control channel. Signaling channel 308 may include adjustments to allocation, acknowledgment, and / or data and power references, control, and pilot transmissions on the reverse link.

The power control channel 310 can hold information regarding interference generated in other sectors due to transmissions from mobile devices in that sector. Also, in certain aspects, subcarriers 314 at the edges of the full bandwidth may function as quasi-guard subcarriers.

It should be noted that if multiple transmit antennas can be used to transmit for the sector, then the different transmit antennas must have the same superframe timing (including superframe index), OFDM symbol characteristics, and hop sequence. In addition, in some aspects, control channel 304-310 may include the same allocation as the data transmission (eg, if data transmissions are block hopped, blocks of the same or different sizes may be added to control channel 304-310). Can be assigned to

Referring again to FIG. 4, aspects of reverse link frame 402 for a multiple access wireless communication system are shown. Physical control channels 404-410 may include different logical control channels as their payload. Logical control channels include r-pahch that represents the power headroom of the mobile device (eg, with respect to the reverse link pilot channel). For example, feedback of such information may be limited based on the number of reports per particular number of slots and the minimum amount of change in value from a previous (in-band) report. Another logical channel may be r-psdch indicating power spectral density or similar information, based on interference control signaling by non-serving base stations and relative channel strength for non-serving base stations. For example, transmission of r-psdch may be limited based on the number of reports per particular number of slots and the minimum amount of change in value from previous (in-band) reports.

Other reverse link logical channels may include event driven channels that persist until feedback is provided from the base station. These include r-reqch requesting reverse link resource allocation and generally persist until resource allocation is provided through allocation. Another such logical channel is r-cqich, which may include a channel quality report sent to the desired forward link serving sector and generally lasts until handoff is allowed. Additionally, a handoff r-reqch may be included, which is a resource request sent to the targeted reverse link serving sector, which generally persists until handoff is allowed, in accordance with various aspects. In addition, the R-ACH may include an R-ACH that may be used as an access channel for random access and access based handoff.

According to further examples, a logical control channel may be included that includes reverse link pilot channels used by the base station along with potentially other information to provide power control criteria and quality measurements for commanded handoff at the base station. . For example, r-cqich can be a broadcast channel quality indicator; r-sfch may provide feedback or subband selection (eg, groups of subcarrier (s)) used to enable subband scheduling; r-bfch may provide precoding feedback for closed loop beamforming and / or spatial division multiple access (SDMA); r-mqich may provide MIMO channel quality feedback and allows for differentiation of channel quality between different streams transmitted to a single mobile device. Transmission of these channels may be limited based on the number of reports per particular number of slots.

The different logical channels may be periodic, event driven or some combination as discussed above that is required for reporting in a regular instance. Periodicity can affect different erasure rates at the base station of these channels. The remaining portions 412 are generally available for data transmission. Also, in certain aspects, subcarriers 414 at the edges of the full bandwidth can function as pseudo-protected subcarriers.

3 and 4 illustrate the different channels that make up the control channels multiplexed in time, but it is not necessary. The different channels that make up the control channels may be multiplexed using different orthogonal, pseudo-orthogonal, or scrambling codes, different frequencies, or any combination of time, code, and frequency. Also, as discussed herein, slots may be one or more OFDM symbols of a given frame that may or may not be contiguous in time.

In addition, the channels discussed in connection with FIGS. 3 and 4 may be messages and / or physical resources. In addition, the physical channel resources allocated for a given mobile device for feedback may be used for one or more different messages (eg, information channels,...).

Referring to FIG. 5, an OFDM control channel (eg, R-ODCCH) is shown. In FIG. 5, an OFDM control channel includes a number of tiles (which may include allocations of some number of subcarriers (eg, 16 tones) on some number of OFDM symbols (eg, 8 OFDM symbols). tiles). This type of allocation may be similar to that used for data channel resource allocation to allow easier resource scheduling, but the subject matter is not so limited and may vary for control channel resource (s) and data channel resource (s). Allocations may be supported.

Each OFDM control channel may have a payload that enables multiplexing of various logical channels or control information types. For example, the total payload of a 22 bit plus 3 bit header can be used to define one or more multiplexed logical channels that are part of a physical channel. The physical channel for a given mobile device may be one quarter of the resources of the tile. These messages may use a 9 bit periodic redundancy check (CRC) to ensure a low error rate that is not detected. In addition, the physical channel resources used by a given mobile device for reverse link control transmission may include sub-tiles (eg, portions) of at least two tiles to provide two order fading and interference diversity. May comprise; Each R-ODCCH segment may include two sub-tiles disposed in two R-DCH tiles. For example, each sub-tile may include 8 tones on 4 OFDM symbols, providing 32 modulation symbols per mobile device in the sub-tile. In addition, random hopping of sub-tiles (eg, by hopping tiles) over bandwidth can be provided to improve diversity.

Referring to FIG. 6, various pilot formats used for OFDM control channels are shown. Three sub-tiles (eg, R-ODCCH sub-tiles) are shown: sub-tile 602 comprising 8 pilots, sub-tile 604 comprising 12 pilots, and 16 pilots Sub-tile 606 including the elements. The formats shown in sub-tiles 602-606 can be optimized across various channel models. Moreover, quadrant phase shift keying (QPSK) with punctured 256 state convolutional code can be used to achieve the desired spectral efficiency.

7 illustrates one embodiment of a binary channel tree 700. In the embodiment shown in FIG. 7, S = 32 subcarrier sets are available for use. The set of traffic channels can be defined to have 32 subcarrier sets. Each channel is assigned a unique channel ID, and each channel is mapped to one or more subcarrier sets at each time interval. For example, a channel may be defined for each node of the channel tree 700. The channels may be numbered sequentially from left to right and top to bottom for each tier. The largest channel corresponding to the top node assigns a channel ID of zero and maps to all 32 subcarrier sets. The 32 traffic channels in the lowest layer 1 have channel IDs of 31 to 62 and are referred to as base traffic channels. Each base channel is mapped to one subcarrier set. The number of physical channels and nodes per node can vary based on system design and use. It can also be dynamic.

The tree structure shown in FIG. 7 places certain restrictions on the use of traffic channels for an orthogonal system. For each channel assigned, all channels for which the assigned channel is a subset and all channels that are subsets (or desiccants) of the assigned channel are limited. Since the restricted channels are not used simultaneously with the assigned channel, the two channels do not use the same set of subcarriers at the same time.

To enable efficient scheduling of control channels and data channels, channel IDs of control channels (eg, OFDM control channels) can be broadcast, and the allocation of data channels being multicast or uni- directional to mobile devices. It may be cast. Thus, such channel IDs that are part of data allocation to the mobile device are broadcast as control channel usage and are not used for data. Thus, higher logical nodes on the tree, including lower nodes allocated for control, can be used for data allocation to the mobile device, thereby saving allocation overhead and potentially leading to simplicity.

For example, the following information may be included in the superframe preamble: (i) a common pilot channel; (Ii) a broadcast channel containing system and configuration information; (Iii) an acquisition pilot channel used to obtain timing and other information; And (iii) indicators from sectors of interference measured in relation to other sectors. Also, in certain aspects, messages for channels in the superframe preamble may span a plurality of superframe preambles of different superframes. This can be used to improve decoding capacity by allocating more resources to specific high priority messages.

8-10, methods related to using OFDMA control channels and CDMA control channels for communicating control information in a wireless communication environment are shown. Although the methods are shown and described as a series of acts for simplicity of description, the methods are not limited to that order of acts and some acts in accordance with one or more embodiments may be in a different order and / or other act than shown and described herein. It should be understood and taken into account that they can be carried out simultaneously. For example, those skilled in the art will understand and appreciate that the method may alternatively be represented as a series of correlated states or events, such as in a state diagram. Moreover, not all illustrated acts may be required to implement a methodology in accordance with one or more embodiments.

Referring to Figure 8, a method 800 is shown that facilitates the assignment of control messages to the appropriate reverse link control channel. At 802, the periodicity of a reverse link control message (eg, logical control channel) can be determined. If the control message is determined to be periodic, the method 800 continues to 804. At 804, a control message can be assigned to an OFDMA control channel (eg, when the control message is periodic). The OFDMA control channel may be a physical control channel. At 806, the control message can be assigned to the appropriate OFDMA control channel segment. An OFDMA physical control channel may be one of two or more sub-tiles from two or more different tiles assigned to a mobile device, one or more subcarrier groups, one or more subcarriers by OFDMA symbol segments, and the like. Can be.

If the control message is determined to be non-periodic at 802, the method may continue to 808. At 808, a control message can be assigned to the CDMA control channel. The CDMA control channel can be a physical control channel. For example, event driven logical channels can be assigned to a CDMA control channel. The CDMA control channel can be any one or more tiles, one or more subcarrier groups, one or more subcarriers by OFDM symbol segments, where the multiple mobile devices have different orthogonal codes, scrambling codes, pseudo-orthogonal Codes and the like may be used to transmit on the same physical resources.

Periodicity may be based on commands received from a base station (eg, dynamically, broadcast or unicast transmission during communication session setup,…). In addition, the periodicity may be based on the type of control message (eg, type of logical channel) transmitted, which may be identified from commands from the base station as a function of the channel type or from known prior art.

The periodicity may be a factor for determining the type of control channel to use, but according to other examples, the identity of the base station to which the logical control channel is directed may be considered to select the type of control channel. For example, whether a logical control channel is transmitted to a serving sector or a non-serving sector can be evaluated to determine whether to use an OFDMA or CDMA control channel. According to another example, transmissions for non-serving sectors may be limited to either an OFDMA or CDMA control channel for all logical control channel types, but the subject matter is not so limited.

9, a method 900 of facilitating the transmission of control information on a reverse link of a wireless communication system is shown. At 902, control information may be generated to be communicated on the reverse link. The control information can be reports related to one or more logical control channels. Moreover, periodicity reports can be generated as a function of the corresponding minimum average rates described by the base station. At 904, a physical control channel type can be selected to transmit control information. For example, the physical control channel type can be selected as a function of control information. The physical control channel type may be, for example, an OFDMA control channel or a CDMA control channel. Moreover, an OFDMA control channel (eg, R-ODCCH segment (s)) can be allocated. The OFDMA control channel may be dedicated to the transmitter for transmitting control information, and / or the CDMA control channel may be shared by multiple transmitters, including the transmitter for transmitting control information. In addition, the selection may be made based on characteristics of the control information (eg, type of logical control channel report), commands received from the base station, time at which transmission is performed, and the like. At 906, control information may be transmitted on the selected type of physical control channel. For example, one or more logical control channel reports may be multiplexed on the OFDMA control channel.

According to an example, the control information can be a report related to a logical control channel. For example, the report can be generated according to a predetermined transmission schedule. In addition, the logical control channel may be transmitted periodically. Moreover, the OFDMA control channel can be selected as the physical control channel type for transmitting control information. According to another example, a report can be generated due to an event, where there is no predetermined schedule when the event occurs. Thus, the transmission of the logical control channel can be triggered by the occurrence of the event. In addition, the CDMA control channel may be selected as the physical control channel type for transmitting control information.

Referring to FIG. 10, a method 1000 of facilitating acquisition of control data via an OFDMA control channel in a wireless communication system is shown. At 1002, OFDMA resources may be allocated to a mobile device for communicating on one or more periodic reverse link logical control channels. For example, a dedicated R-ODCCH segment may be assigned (or deallocated) to the mobile device. In addition, the assignment may be sent to the mobile device specifying information related to the R-ODCCH segment ID, interlace index, R-ODCCH periodicity and phase, etc. in the interlace. Moreover, according to one example, one or more periodic reverse link logical control channels may include r-cqich, r-reqch, r-sfch, r-bfch, scw r-mqich, mcw r-mqich, and the like. At 1004, minimum average rates for a mobile device for transmitting one or more periodic reverse link logical control channels in the allocated OFDMA resources may be adjusted. At 1006, multiplexed data may be received via allocated OFDMA resources that include at least one subset of one or more periodic reverse link logical control channels. Moreover, event driven logical control channel (s) may be obtained via a CDMA control channel.

According to another example, OFDMA resources may include reverse link OFDMA control channel (R-ODCCH) segments. In addition, R-ODCCH puncturing of reverse link data channel (R-DCH) resources may be achieved. Moreover, the R-ODCCH may be allocated per base station with a specific granularity (eg 16 channels,...), And the amount of allocated resources may be signaled via overhead channels. In addition, R-ODCCH segments may be allocated based on layer 3 (L3) signaling. In addition, adjusting the minimum average rates controls the rates of the individual logical control channels through the minimum average rates, and allows the mobile device to determine multiplexing of different logical control channels and indicate the report composition through the header. It may further include allowing.

In accordance with one or more aspects described herein, it will be appreciated that inferences may be made in connection with using various types of physical control channels. As used herein, the term “infer” or “inference” is generally used to refer to a system from a set of observations as captured through events and / or data. It refers to a process of estimating or inferring states, environments, and / or users. Inference can be used, for example, to identify a specific context or action, or can generate a probability distribution over states. The estimation may be probabilistic, ie the calculation of the probability distribution for the states of interest based on consideration of the data and events. Estimation may also refer to techniques used to construct higher-level events from a set of events and / or data. Such an estimate may include a set of observed events and / or stored event data, whether the events are correlated in close temporal proximity, and whether the events and data originate from one or several events and data sources. To configure new events or actions.

According to one example, one or more of the methods presented above may include forming interferences related to selecting a type of physical control channel for use to send a logical control channel report. By way of further example, the estimation may be made in connection with determining which logical control channel report is included in the multiplexed signal transmitted over the OFDMA control channel. The foregoing examples are illustrative in nature, and it will be considered that they are not intended to limit the manner in which such estimates are made or the number of estimates that can be made in connection with the various embodiments and / or methods described herein.

11 illustrates a mobile device 1100 that facilitates the use of various types of physical control channels in a wireless communication system. Mobile device 1100 includes a receiver 1102, which receives a signal from a receive antenna (not shown), for example, and performs typical operations (eg, filtering, amplifying, down) on the received signal. Converting, etc.) and digitize the adjusted signal to obtain samples. Receiver 1102 may be, for example, an MMSE receiver and may include a demodulator 1104 that can demodulate received symbols and provide them to the processor 1106 for channel estimation. Processor 1106 is a processor dedicated to the generation of information for analysis of information received by receiver 1102 and / or for transmission by transmitter 1116, a processor that controls one or more components of mobile device 1100, And / or a processor that analyzes the information received by the receiver 1102, generates information for transmission by the transmitter 1116, and controls one or more components of the mobile device 1100.

The mobile device 1100 can additionally include a memory 1108 coupled to the processor 1106 that is operated, wherein the memory 1108 can transmit data, receive data, data associated with the analyzed pilots, and logical control. Any other suitable information for generating the channel report (s) can be stored. Memory 1108 may additionally store algorithms and / or protocols associated with identifying the type of physical control channel (eg, OFDMA, CDMA,…) for communicating the generated logical control channel report (s). .

It will be appreciated that the data store (eg, memory 1108) described herein can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. By way of example and not limitation, nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), which acts as external cache memory. By way of example and not limitation, RAM includes synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synclink DRAM (SLDRAM), and Many forms are available, such as Direct Rambus RAM (DRRAM). The memory 1108 of the subject systems and methods is intended to include, but is not limited to, these types and any other suitable types of memory.

Receiver 1102 is further operated in conjunction with report generator 1110 which can use the signals obtained by receiver 1102 to produce various logical control channel reports. For example, report generator 1110 may generate periodic reports and / or event driven reports. Moreover, periodicity reports may be calculated to have at least minimum average periodicity obtained by the receiver 1102 (eg, from a base station). Additionally, the control channel selector 1112 can identify the physical control channel type for communicating the report (s) produced by the report generator 1110. For example, reports can be sent over an OFDMA control channel or a CDMA control channel. The control channel selector 1112 may select the type of physical control channel as a function of the type of report (eg, characteristics of the logical control channel), the received command, the latency of the request, and the like. Mobile device 1100 further includes a transmitter 1116 and a modulator 1114 for transmitting signals to, for example, base stations, other mobile devices, and the like. While shown as being separate from the processor 1106, the report generator 1110, control channel selector 1112 and / or modulator 1114 may be multiple processors (not shown) or part of the processor 1106. Consider the point.

12 shows a system 1200 that facilitates allocation of OFDMA control channel resources to mobile device (s) in a wireless communication environment. System 1200 may include a receiver 1210 that receives signal (s) from one or more mobile devices 1204 with multiple receive antennas 1206, and one or more mobile devices 1204 via transmit antenna 1208. And a base station 1202 (eg, access point,...) With a transmitter 1222 to transmit. The receiver 1210 may receive information from the receiving antennas 1206 and operates in conjunction with a demodulator 1212 that demodulates the received information. The demodulated symbols are analyzed by processor 1214, which may be similar to the processor described above with respect to FIG. 11, where processor 1214 is coupled to memory 1216 and memory 1216 generates pilot (s). Information related to, data received or transmitted from mobile device (s) 1204 (or different base stations (not shown)), and / or any other suitable related to performing the various operations and functions described herein. Save the information. The processor 1214 is further coupled to a resource allocator 1218 that generates allocation messages that can be communicated to the mobile device (s) 1204. The resource allocator 1218 may allocate and / or deallocate reserved OFDMA control channel resources, as described herein, for example.

The resource allocator 1218 is coupled to a report coordinator 1220 that controls the minimum average rates at which various reports (eg, logical control channel reports) are communicated from the mobile device (s) 1204 to the base station 1202. Can be operated. Report coordinator 1220 may be further coupled to modulator 1222 (eg, resource allocations and / or minimum average rate related data may be provided to modulator 1222). The modulator 1222 can multiplex the allocation (s) and / or minimum average rate related data for transmission by the transmitter 1226 to the mobile device (s) 1204 via the antenna 1208. Although shown as separate from the processor 1214, the resource allocator 1218, report coordinator 1220 and / or modulator 1222 may be multiple processors (not shown) or part of processor 1214. Consider.

13 illustrates an example of a wireless communication system 1300. The wireless communication system 1300 shows one base station 1310 and one mobile device 1350 for simplicity. However, it should be taken into account that the system 1300 may include more than one base station and / or more than one mobile device, where additional base stations and / or mobile devices are described in the example base station 1310 described below. And substantially the same as or different from mobile device 1350. In addition, the base station 1310 and / or the mobile device 1350 may utilize these systems (FIGS. 1-2, 11-12 and 14-15) and / or methods (FIGS. 8-10) as described herein. It should be taken into account that the wireless communication between the two can be seamlessly enabled.

At base station 1310, traffic data for multiple data streams is provided from a data source 1312 to a transmit (TX) data processor 1314. According to one example, each data stream may be transmitted on each antenna. TX data processor 1314 formats, codes, and interleaves the traffic data stream based on a particular coding scheme selected for the data stream to provide coded data.

Coded data for each data stream may be multiplexed into pilot data using Orthogonal Frequency Division Multiplexing (OFDM) techniques. Additionally or alternatively, the pilot symbols may be frequency division multiplexing (FDM), time division multiplexing (TDM), or code division multiplexing (CDM). Pilot data is a known data pattern that is typically processed in a known manner and may be used at mobile device 1350 to estimate the channel response. The multiplexed pilot and coded data for each data stream is selected for a particular modulation scheme (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying) selected for that data stream to provide modulation symbols. (QPSK), M-phase-shift keying (M-PSK), M- quadrature amplitude modulation (M-QAM), and the like. Data rate, coding, and modulation for each data stream may be determined by instructions performed or provided by the processor 1330.

Modulation symbols for the data streams may be provided to a TX MIMO processor 1320 that may further process the modulation symbols (eg, for OFDM). At this point, the TX MIMO processor 1320 provides the N _T modulation symbol streams to the N _T transmitters (TMTR) 1322a through 1322t. In various embodiments, TX MIMO processor 1320 applies beamforming weights to the symbols of the antenna and data streams on which the symbol is transmitted.

Each transmitter 1322 receives and processes each symbol stream to provide one or more analog signals, and further adjusts (eg, amplifies, amplifies, etc.) the analog signals to provide a modulated signal suitable for transmission on a MIMO channel. Filtering, and upconverting). In addition, N _T modulated signals from transmitters 1322a through 1322t are transmitted to N _T antennas 1324a through 1324t, respectively.

At mobile device 1350, modulated signals transmitted are received by N _R antennas 1352a through 1352r, and the received signal from each antenna 1352 is received by each receiver (RCVR) 1354a through 1354r. Is provided. Each receiver 1354 adjusts (eg, filters, amplifies, and downconverts) each signal, digitizes the adjusted signal to provide samples, and further processes the samples to correspond to the corresponding "received" symbol stream. To provide.

RX data processor 1360 may receive and process N _R received symbol streams from N _R receivers 1354 based on a particular receiver processing technique to provide N _T “detected” symbol streams. The RX data processor 1360 may demodulate, deinterleave, and decode each detected symbol stream to recover traffic data for the data stream. Processing by the RX data processor 1360 is complementary to that performed by the TX MIMO processor 1320 and the TX data processor 1314 at the base station 1310.

The processor 1370 may periodically determine the techniques available for use as described above. In addition, the processor 1370 may formulate a reverse link message comprising a matrix index portion and a rank value portion.

The reverse link message may comprise various types of information regarding the received data stream and / or the communication link. The reverse link message is processed by the TX data processor 1338 that receives traffic data for multiple data streams from the data source 1336, modulated by the modulator 1380, and transmitted to the transmitters 1354a-1354r. May be adjusted and transmitted back to the base station 1310.

At base station 1310, modulated signals from mobile device 1350 are received by antennas 1324, adjusted by receivers 1322, demodulated by demodulator 1340, and an RX data processor ( Extract the reverse link message processed by 1342 and transmitted by mobile device 1350. In addition, the processor 1330 may process the extracted message to determine a precoding matrix for use to determine beamforming weights.

Processors 1330 and 1370 may direct (eg, control, coordinate, manage, etc.) operation at base station 1310 and mobile device 1350, respectively. Respective processors 1330 and 1370 may be associated with memories 1332 and 1372 that store program codes and data. Processors 1330 and 1370 may also perform calculations to derive frequency and impulse response estimates for the uplink and downlink, respectively.

It should be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. In a hardware implementation, the processing units may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, It may be implemented within a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof.

When embodiments are implemented in software, firmware, middleware or microcode, program code or code segments, they may be stored in a machine-readable medium such as a storage component. A code segment can represent a procedure, function, subprogram, program, routine, subroutine, module, software package, class, or any combination of instructions, data structures, or program statements. Code segments may be coupled to other code segments or hardware circuitry by passing and / or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, and the like may be communicated, forwarded or transmitted using any suitable means, including memory sharing, message delivery, token delivery, network transmission, and the like.

In a software implementation, the techniques presented herein may be implemented in modules (eg, procedures, functions, etc.) that perform the functions presented herein. Software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it may be coupled to and communicated with the processor through various means as is known in the art.

Referring to FIG. 14, shown is a system 1400 that enables communication of control information on a reverse link in a wireless communication environment. For example, system 1400 can reside at least partially within a mobile device. It should be considered that system 1400 is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, software, or combination thereof (eg, firmware). System 1400 includes a logical grouping 1402 of electrical components that can operate in conjunction. For example, logical grouping 1402 can include an electrical component 1404 for generating a control message related to the reverse link logical control channel. In addition, logical grouping 1402 may include an electrical component 1406 for selecting a physical control channel type for transmitting a control message. For example, the selection of the physical control channel type can be a function of the control message. Moreover, logical grouping 1402 can include an electrical component 1408 for transmitting control messages over the selected physical control channel type. For example, the information can be included in the PDR associated with each pilot. Additionally, system 1400 can include a memory 1410 that retains instructions for executing functions associated with electrical components 1404, 1406, 1408. While shown as being external to memory 1410, it is to be understood that one or more electrical components 1404, 1406, 1408 can exist within memory 1410.

Referring to FIG. 15, illustrated is a system 1500 that enables allocation of reverse link OFDMA control channel resources in a wireless communication environment. System 1500 may reside at least partially within a base station, for example. As shown, system 1500 includes functional blocks that can represent functions implemented by a processor, software, or a combination thereof (eg, firmware). System 1500 includes a logical grouping 1502 of electrical components that can act in conjunction. Logical grouping 1502 may include an electrical component 1504 for assigning dedicated resources to a mobile device. For example, the dedicated resources may be OFDMA control channel segment (s). Moreover, logical grouping 1502 can include an electrical component 1506 for adjusting minimum average rates to report control information related to one or more reverse link logical control channels. In addition, logical grouping 1502 may include an electrical component 1508 for obtaining multiplexed data over allocated dedicated resources including control information related to at least one subset of one or more reverse link logical control channels. have. Additionally, system 1500 may include a memory 1510 that retains instructions for executing functions associated with electrical components 1504, 1506, 1508. Although shown as being external to memory 1510, it is to be understood that electrical components 1504, 1506, and 1508 can exist within memory 1510.

The foregoing includes examples of one or more embodiments. Of course, not all conceivable combinations of components or methods for the purpose of describing the foregoing embodiments may be described, but one of ordinary skill in the art may recognize that many further combinations and modifications of the various embodiments may be possible. Accordingly, the described embodiments are intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Moreover, in the scope of the term "includes" as used in the description or claims, such terms are intended to be "comprising" as interpreted when "comprising" is used as an alternative term in the claims. Is intended to be inclusive in a manner similar to the term

Claims (38)

A method of facilitating acquisition of control data via a reverse link control channel, the method comprising:
Allocating OFDMA control channel resources to the mobile device to communicate one or more periodic reverse link logical control channels;
Adjusting minimum average rates for the mobile device to transmit the one or more periodic reverse link logical control channels on the allocated OFDMA control channel resources; And
Receiving multiplexed data on the allocated OFDMA control channel resources, the multiplexed data comprising at least one subset of the one or more periodic reverse link logical control channels
Including a method for facilitating acquisition of control data. The method of claim 1,
Receiving non-periodic reverse link logical control channels over a CDMA control channel. The method of claim 1,
Allocating the OFDMA control channel resources further comprises transmitting an assignment specifying information related to one or more of a segment ID, interlace index, periodicity, or phase in an interlace. Comprising a method for facilitating acquisition of control data. The method of claim 1,
De-assigning the OFDMA control channel resources associated with the mobile device. The method of claim 1,
Wherein the OFDMA control channel resources comprise reverse link OFDMA control channel (R-ODCCH) segments. The method of claim 5, wherein
R-ODCCH puncturing the reverse link data channel (R-DCH) resources. The method of claim 5, wherein
Allocating an R-ODCCH per base station with a specific granularity; And
Signaling the allocated resources on the overhead channels
Further comprising: acquiring control data. The method of claim 5, wherein
Allocating R-ODCCH segments based on L3 signaling. The method of claim 1,
Adjusting the minimum average rates includes controlling the rates of individual logical control channels through the minimum average rates, and the mobile device determines multiplexing of different logical control channels and sets a report composition through a header. Allowing to display, further comprising: acquiring control data. A device operating in a wireless communication system,
Allocate OFDMA control channel resources to the mobile device for use in one or more periodic reverse link logical control channels and obtain minimum average rates for the mobile device to communicate reports related to the one or more periodic reverse link logical control channels. At least one processor configured to coordinate and obtain multiplexed data via the allocated OFDMA control channel resources, the multiplexed data comprising reports related to at least one subset of the one or more periodic reverse link control channels; And
Memory coupled to the at least one processor
Apparatus operating in a wireless communication system comprising a. The method of claim 10,
And the at least one processor is further configured to obtain reports corresponding to event driven reverse link logical control channels over a CDMA control channel. The method of claim 10,
The at least one processor is further configured to transmit an allocation related to the OFDMA control channel resources, wherein the allocation comprises information related to at least one of a segment ID, interlace index, periodicity, or phase in an interlace. Devices that operate on the system. The method of claim 10,
And the at least one processor is further configured to deallocate the OFDMA control channel resources. The method of claim 10,
And the OFDMA control channel resources comprise reverse link OFDMA control channel (R-ODCCH) segments. The method of claim 14,
And the at least one processor is further configured to puncture reverse link data channel (R-DCH) resources. The method of claim 14,
Wherein the at least one processor is further configured to allocate an R-ODCCH per base station at a particular granularity and to signal the allocated resources on overhead channels. The method of claim 14,
And the at least one processor is further configured to allocate R-ODCCH segments based on L3 signaling. The method of claim 10,
The at least one processor is further configured to control the rates of individual logical control channels through the minimum average rates, such that the mobile device can determine multiplexing of different logical control channels and display a report component through a header. A device operating in a wireless communication system. A wireless communication apparatus for enabling allocation of reverse link OFDMA control channel resources in a wireless communication environment, comprising:
Means for assigning dedicated resources to the mobile device;
Means for adjusting minimum average rates to report control information related to one or more reverse link logical control channels; And
Means for obtaining, via the allocated dedicated resources, multiplexed data comprising control information related to at least one subset of the one or more reverse link logical control channels.
And enabling allocation of reverse link OFDMA control channel resources. The method of claim 19,
Wherein the dedicated resources are associated with an OFDMA control channel, enabling allocation of reverse link OFDMA control channel resources. The method of claim 19,
And means for obtaining event-driven reverse link logical control channels over a CDMA control channel. The method of claim 19,
And means for deallocating the dedicated resources associated with the mobile device. delete The method of claim 19,
And the dedicated resources include reverse link OFDMA control channel (R-ODCCH) segments. The method of claim 24,
Means for puncturing reverse link data channel (R-DCH) resources, the wireless communication device enabling allocation of reverse link OFDMA control channel resources. The method of claim 24,
Means for allocating an R-ODCCH per base station at a given granularity; And
Means for signaling allocated resources on overhead channels
Further comprising: allocating reverse link OFDMA control channel resources. The method of claim 24,
Means for allocating R-ODCCH segments based on L3 signaling, wherein the wireless communication apparatus enables allocation of reverse link OFDMA control channel resources. The method of claim 19,
Means for controlling the rates of individual logical control channels via the minimum average rates to enable the mobile device to determine the multiplexing of the logical control channels and to indicate a report component via a header. And, enabling the allocation of reverse link OFDMA control channel resources. 22. A computer-readable medium,
Code for causing at least one computer to allocate dedicated resources to the mobile device;
Code for causing the at least one computer to adjust minimum average rates to report control information related to one or more reverse link logical control channels; And
Code for causing the at least one computer to receive multiplexed data over the allocated dedicated resources including control information related to at least one subset of the one or more reverse link logical control channels.
Gt; computer-readable < / RTI > medium. The method of claim 29,
And the dedicated resources are related to an OFDMA control channel. The method of claim 29,
And code for causing the at least one computer to receive event driven reverse link logical control channels over a CDMA control channel. The method of claim 29,
And code for causing the at least one computer to deallocate the dedicated resources associated with the mobile device. delete The method of claim 29,
And the dedicated resources comprise reverse link OFDMA control channel (R-ODCCH) segments. 35. The method of claim 34,
And code for causing the at least one computer to puncture reverse link data channel (R-DCH) resources. 35. The method of claim 34,
Code for causing the at least one computer to allocate an R-ODCCH per base station at a granularity of 16 channels; And
Code for causing the at least one computer to signal allocated resources on overhead channels
Further comprising a computer-readable medium. 35. The method of claim 34,
And code for causing the at least one computer to allocate R-ODCCH segments based on L3 signaling. The method of claim 29,
Code for causing the at least one computer to control rates of individual logical control channels through the minimum average rates to allow the mobile device to determine multiplexing of different logical control channels and display a report component through a header. Further comprising a computer-readable medium.

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