RU2433538C2 - Synchronising partitioned resources among multiple sectors of ofdm wireless communication system - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: invention enables to partition resources so that they can work in different modes, as well as synchronise these partitioned resources among different sectors so that they can employ mutually cooperative power allocation settings. The resources can be partitioned into one of two modes, namely, block mode or distributed mode. A user can be synchronised according to the mode and a zone, which can be partly based on that mode. Synchronisation can be based on bit reversal order or quasi-uniform spacing of tones.

EFFECT: facilitating resource partitioning for wireless communication systems.

34 cl, 11 dwg

Description

Cross reference

This application claims priority to provisional application US No. 60/828027, entitled "SYSTEM AND METHOD FOR RESOURCE PARTITIONING FOR WIRELESS COMMUNICATION SYSTEMS", filed March 10, 06 and provisional application US No. 60/849292, entitled "DRCH / BRCH Multiplexing", filed March 10, .06, as well as provisional application US No. 60/828265, entitled "SYSTEM AND METHOD FOR RESOURCE PARTITIONING FOR WIRELESS COMMUNICATION SYSTEMS", filed May 10, 06. The contents of these applications are hereby incorporated by reference in their entirety.

FIELD OF THE INVENTION

The following description relates generally to wireless communication systems and relates, inter alia, to resource sharing for wireless communication systems.

State of the art

Wireless communication systems have become the predominant means by which most people around the world communicate. Wireless devices have become smaller and more powerful to meet consumer needs and improve portability and usability. The increase in processing performance in mobile devices such as cell phones has led to increased demands on wireless network transmission systems. Such systems, as a rule, are not updated as easily as cellular devices that communicate through them. When expanding the capabilities of mobile devices, it may be difficult to support an older wireless network system so that the new and improved capabilities of wireless devices are fully utilized.

Wireless communication systems typically use different approaches to create transmission resources in the form of channels. Such systems may be code division multiplexing (CDM) systems, frequency division multiplexing (FDM) systems and time division multiplexing (TDM) systems. One well-known FDM option is orthogonal frequency division multiplexing (OFDM), which effectively splits the entire system bandwidth into multiple orthogonal subcarriers. These subcarriers are also called tones, bins, and frequency channels. Each subcarrier may be modulated with data. When using technology based on time division of channels, each subcarrier may contain a section of consecutive time intervals or time slots. Each user can be provided with one or more time slots and subcarrier combinations for transmitting and receiving information during a particular packet period or frame. As switching schemes, a symbol rate switching scheme or a block switching scheme can usually be used.

Methods based on code division of channels, as a rule, transmit data at several frequencies available at any time in a certain range. Typically, data is digitized and expanded over an available frequency band, and many users can overlap in this channel, and a unique sequence code can be assigned to the corresponding users. Users can transmit in the same broadband section of the spectrum, and the signal of each user is expanded over the entire frequency band with a corresponding unique spreading code. This technology can provide collaboration when one or more users can simultaneously transmit and receive. This collaboration can be achieved by spread spectrum digital modulation, when the user bitstream is encoded and distributed over a very wide channel in a pseudo-random manner. The receiver is designed to recognize the corresponding unique sequential code and eliminate randomization in order to collect the bits for a particular user in an understandable way.

A typical wireless communication network (for example, using frequency, time and / or code division multiplexing techniques) includes one or more base stations that provide a coverage area, and one or more mobile (eg, wireless) terminals that can transmit and receive data in the service area. A typical base station may simultaneously transmit multiple data streams for broadcast, multicast, and / or unidirectional services, where the data stream may be of interest to the mobile terminal in terms of the possibility of its independent reception. A mobile terminal in the coverage area of this base station may be interested in receiving one, several or all data streams transmitted by the base station. Similarly, a mobile terminal can transmit data to a base station or other mobile terminal.

Disclosure of invention

The following is a simplified summary of the invention to provide a common understanding of some aspects of the disclosed embodiments. This section does not provide an extended description and does not purport to identify key or critical elements, as well as to determine the scope of these embodiments of the invention. The purpose of the section is to present in a simplified form a number of concepts of the embodiments described herein as a prelude to the more detailed description presented below.

According to one or more embodiments and their corresponding description, various aspects of the invention are described in connection with sharing resources so that they can operate in different modes and in connection with synchronizing this separation among different sectors so that they can share common distribution settings power.

One aspect relates to a method for sharing resources. This method includes sharing resources for operating in different modes and synchronizing shared resources among multiple sectors. The method further includes communicating with the user according to the indicated modes and synchronization. Modes include block mode or distributed mode.

According to another aspect, a wireless communication device is provided that includes a processor and memory. The processor executes instructions for dividing resources for operating in one of two modes, synchronizing shared resources among multiple sectors, and communicating with a user according to the indicated modes and synchronization. Information related to instructions created by the processor is stored in memory.

Another aspect relates to a wireless communications apparatus that provides resource sharing. The device includes means for sharing resources for operating in two modes and means for synchronizing shared resources among multiple sectors. The device also includes means for communicating with the user according to the indicated modes and synchronization.

A further aspect relates to a machine-readable medium with machine-stored instructions stored thereon for sharing resources for operating in block mode or distributed mode. These commands also include synchronizing shared resources among multiple sectors and communicating with the user according to the indicated modes and synchronization.

Another relevant aspect is a device capable of operating in a wireless communication system. The device includes a processor configured to distribute a first group of subcarriers to operate in a symbol rate control mode and assign a second group of subcarriers to operate in block mode. According to one or another mode, a zone can be defined. A processor may also be configured to divide said zone into a plurality of subbands and distribute the subbands using the reverse bit order or quasi-uniform tone distribution.

To the accomplishment of the foregoing and related ends, one or more embodiments of the invention comprise the features fully described and partially indicated in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects, and they show only a few different ways of possible use of the principles embodied in these embodiments of the invention. Other advantages and new features will become apparent from the following detailed description along with the drawings; it is contemplated that the disclosed embodiments include all of these aspects and their equivalents.

Brief Description of the Drawings

FIG. 1 is an illustration of a multiple access wireless communication system that can be used to share resources;

FIG. 2 is an illustration of a multiple access wireless communication system according to various resource sharing options;

FIG. 3 is an exemplary system providing the ability to share resources;

FIG. 4 illustrates aspects of superframe structures for a multiple access and frequency division multiple access (FDD) wireless communication system;

FIG. 5 illustrates aspects of superframe structures for a time division multiple access (TDD) duplex wireless communication system;

FIG. 6 is an illustration of frame aspects for a multiple access wireless communication system;

FIG. 7 is an illustration of aspects of a resource sharing scheme for a multiple access wireless communication system;

FIG. 8 is an exemplary system enabling resource sharing and synchronization for a wireless communication network;

FIG. 9 is an illustration of a method that enables the sharing of resources;

FIG. 10 is an illustration of aspects of a transmitter and a receiver in a multiple access wireless communication system;

FIG. 11 is an exemplary system for sharing and synchronizing resources.

The implementation of the invention

Next, various embodiments of the invention are described with reference to the drawings. In the following description, numerous specific details are set forth in order to explain the invention in order to provide a thorough understanding of one or more aspects of the invention. However, it is obvious that the indicated embodiment (s) of implementation can be practically implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing embodiments of the invention.

It is understood that the terms “component”, “module”, “system”, etc., used in this application. refer to an object related to a computer, any hardware, firmware, combination of hardware and software, software, or executable software. For example, a component can be, but is not limited to: a process running on a processor; CPU; an object; executable file; thread of execution; program and / or computer. A component may, for example, be both an application running in a computing device and the computing device itself. One or more components may reside within a process and / or thread of execution, wherein the component may be localized on one computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. These components can communicate with each other through local and / or remote processes, for example, in accordance with a signal containing one or more data packets (for example, data from one component interacting with another component in a local system, distributed system, and / or over a network such as the Internet, with other systems using the signal mentioned).

In addition, various embodiments related to a wireless terminal are described herein. A wireless terminal is also called a system, subscriber unit, subscriber station, mobile station, mobile device, remote station, remote terminal, access terminal, user terminal, terminal, wireless device, user agent, user device, or user equipment (UE). A wireless terminal may be a cell phone, a cordless telephone, a Session Initiation Protocol (SIP) telephone, a wireless subscriber loop station (WLL), a personal digital assistant (PDA), a handheld device with wireless capabilities, a computing device or other processing device connected to the wireless modem. In addition, various embodiments related to a base station are described herein. A base station may be used to communicate with a wireless terminal (s) and may also be called an access point, a Node B, or some other terminology.

Various aspects or features will be presented based on systems, which may include a number of devices, components, modules, and the like. It should be clear that various systems may include additional devices, components, modules and / or may not include all of the mentioned devices, components and modules discussed in connection with these drawings. A combination of these approaches may also be used.

Turning now to the drawings, where in FIG. 1 shows a multiple access wireless communication system 100 that can be used to share resources. Resources can be divided into distributed zones and localized zones. The purpose of distributed zones is to provide large diversity, which is applicable in situations where channel conditions cannot be predicted. Diversity is desirable because when assigned without diversity, you can be in those parts of the channels or parts of the frequency band that cannot provide adequate signal quality (for example, a channel with fading). On the other hand, if there is a user with a slowly changing channel quality (for example, a practically stationary user) that can be predicted by the scheduler, the system can realize the benefits of localized assignments by scheduling the user’s work in that part of the localized zone where the user channel provides high signal quality .

System 100 comprises an access point (AP) 102, which may include a plurality of antenna groups, one of which contains antennas 104 and 106, the other comprises antennas 108 and 110, and an additional group includes antennas 112 and 114. FIG. 1 for each antenna group, only two antennas are shown; however, for each antenna group, more or fewer antennas can be used. Access terminal 116 (AT) is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to access terminal 116 via forward link 118 and receive information from access terminal 116 via reverse link 120. Access terminal (AT) 122 is in communication with antennas 106 and 108, with antennas 106 and 108 transmit information to access terminal 122 on forward link 124 and receive information from access terminal 122 on reverse link 126. In a frequency division duplex (FDD) system, lines 118, 120, 124, and 126 may use different frequencies for communication. For example, forward link 118 may use a frequency different from that used by return line 120. In some aspects, a single frequency network (SFN) may be used.

Each group of antennas and / or the area in which they are intended to communicate is often called the sector of the access point. As shown in FIG. 1, antenna groups may be designed to communicate with an access terminal in a sector of areas served by access point 102.

When transmitting on the straight lines 118 and 124, the transmitting antennas of the access point 102 use beamforming for various access terminals 116 and 122 to improve the signal-to-noise ratio of the straight lines. Also, an access point using beamforming for transmission to access terminals randomly scattered throughout the coverage area causes less interference at access terminals in neighboring cells than an access point transmitting through one antenna to all access terminals.

The access point used here may be a fixed station used to communicate with the terminals, and may also be referred to as a base station, a Node B, or some other term, and it may include some or all of their functionality. An access terminal may also be called a user equipment, a wireless communication device, a terminal, a wireless terminal, a mobile station, or some other term and include some or all of their functionality.

In FIG. 2 shows a multiple access wireless communication system 200 according to various resource sharing options. System 200 may provide the ability to split resources so that they can operate in different modes, as well as synchronize the results of this separation among different sectors, so that they can share common power distribution settings.

In more detail, the multiple access wireless communication system 200 includes multiple cells, for example, cells 202, 204, and 206. In the embodiment of FIG. 2, each cell 202, 204, and 206 may include an access point 208, 210, 212 that contains multiple sectors. This set of sectors is formed by groups of antennas, each of which is responsible for communication with access terminals in one part of the cell. In cell 202, each of antenna groups 214, 216, and 218 corresponds to a separate sector. In cell 204, each of antenna groups 221, 222, and 224 corresponds to a separate sector. In cell 206, each of antenna groups 226, 228, and 230 corresponds to a separate sector.

Each cell includes several access terminals that are in communication with one or more sectors of each access point. For example, terminals 232, 234, 236, and 238 are in communication with base station 208, terminals 240, 242, and 244 are in communication with access point 210, and access terminals 246, 248, and 250 are in communication with access point 212.

As shown, for example, in the cell 204, each access terminal 240, 242, and 244 is located in a portion of a corresponding cell other than a portion of any other access terminal in the same cell. In addition, each access terminal 240, 242, and 244 may be located at a different distance from the corresponding antenna group with which it communicates. Both of these factors, as well as environmental conditions and other conditions in the cell, lead to situations when different channel conditions arise between each access terminal and the corresponding antenna group with which it communicates.

According to some aspects, access terminals in a particular cell may be in communication with an access point associated with that cell, and in fact at the same time in communication with an access point associated with another cell. For example, access terminal 232 may be in communication with access points 208 and 210; moreover, the access terminal 248 may be in communication with access points 210 and 212, and the access terminal 250 may be in communication with access points 208 and 212.

An access terminal in communication with two or more access points can receive a signal in a straight line from each access point, which is actually the same signal (for example, an access point plays the role of another access point explicitly for the terminal). However, the access terminal may not know or not be interested in which access point is in communication with it, since the access terminal receives a signal that looks like a signal from the master sector. Thus, another sector plays the role of a master sector. The access terminal can transmit on the return line, and both sectors (for example, access points) can “listen”, and the access point having the best channel can play the role of the access terminal. Additional information related to this issue is presented below in the following figures.

A controller 252 is connected to each of the cells 202, 204, and 206. The controller 252 may have one or more connections to multiple networks, such as the Internet, other packet-based networks, or circuit switched networks that transmit and receive information from terminals access in communication with cells of a multiple access wireless communication system 200. The controller 252 comprises a scheduler or connected to a scheduler that schedules transmission from and to access terminals. In some embodiments, the scheduler may reside in each individual cell, each sector of a cell, or a combination thereof.

Each of the sectors can function using one or more of the multiple carriers. Each carrier is part of a wider frequency band in which the system can operate, or which is available for communication. A single sector using one or more carriers may have multiple access terminals scheduled on each of the different carriers during any given time interval (eg, frame or superframe). In addition, one or more access terminals can be scheduled for communication on multiple carriers at virtually the same time.

An access terminal may be scheduled to operate on a single carrier or multiple carriers in accordance with some capabilities. These capabilities may form part of the session information that is created when the access terminal is trying to get a connection, or that has been agreed in advance; and these capabilities may form part of the identification information that is transmitted by the access terminal, or may be established according to another approach. In some aspects, the session information may include a session identification token that is created upon request of the access terminal, or as a result of determining capabilities through appropriate transmissions.

It should be noted that, although in FIG. 2 shows physical sectors (for example, having different antenna groups for different sectors), other approaches can be used. For example, instead of physical sectors or in combination with them, you can use many fixed "rays", each of which covers different areas of the cell in the frequency domain.

In FIG. 3 shows an exemplary system 300 that enables resource sharing. System 300 may be configured to share resources so that these resources can operate in different modes. There are at least two modes of operation, namely switching the symbol rate and switching the block rate. In addition, system 300 may be configured to synchronize partitioning among different sectors so that different sectors can use common power distribution settings.

In more detail, system 300 includes a transmitter 302 that is in wireless communication with receiver 304. Transmitter 302 may be a base station, and receiver 304 may be a communication device. It should be understood that the system 300 may include one or more transmitters 302 and one or more receivers 304. However, for simplicity, only one receiver and only one transmitter are shown here.

The transmitter 302 includes a splitter 306, which may be configured to assign a mode. A part or a subset of resources may be assigned a symbol rate control mode (or distributed resource channels), and another part or a subset of resources may be assigned a block rate control mode (or block resource channels). The mode (distributed or block) can be determined using various means, including analysis of channel conditions that could have been reported previously (for example, indicators of channel quality from users), or based on other criteria, including quality of service and other factors that can be consider when assigning a mode. In addition, the mode assignment could be performed earlier, and it can be constant, depending on the parameters of the user and the system.

The transmitter 302 includes a scheduler 306, which can be configured to determine the area (which is a collection of resources) of the receiver 304 based on the assigned mode. To create a zone, a subset of carriers can be selected randomly or in a reordered order. The first subset of zones may be assigned to symbol rate switching zones (DRCH zones), and the remaining subcarriers may be assigned to block transmission rate switching zones (BRCH zones).

For example, when using OFDM, a zone is a combination of symbol tones, and the set of symbol tones can be fixed. Two types of zones can be created, namely a symbol rate switching zone and a block rate switching zone. A symbol rate switching zone is also called a distributed resource channel zone (DRCH zone). The block rate switching zone is also called the block resource channel zone (BRCH zone). Symbol rate switching indicates that a particular channel (DRCH) includes tones and symbols scattered throughout the available frequency and time band. When switching the symbol rate, a group of subcarriers or tones in a channel changes each symbol, so that for each OFDM symbol a particular channel may occupy a different set of subcarriers. When switching the symbol rate, a distributed channel is used, where each channel contains dispersed tones or subcarriers.

In the block rate switching zone, a separate channel (BRCH) includes adjacent groups of subcarriers and symbols. When switching the block transfer rate, the set of subcarriers in the channel is adjusted to fit a frame that includes several characters. When crossing a frame boundary, when this boundary contains several characters, switching to another set of subcarriers takes place. Thus, the tone that the channel occupies remains the same for a given number of characters, after which it changes. It should be noted that the terms “subcarriers” and “tones” used herein are used interchangeably. In addition, the number of characters (for example, 8 characters) can be divided into several tones. Thus, for the entire resource block (for example, a superframe), the first subset uses the symbol rate switching zone, and the second subset uses the block rate switching zone.

Also included in the transmitter 302 is a subzone generator 312 that can be configured to split one or more zones into multiple subzones. Channels can be created in each subzone, with each channel switching in the corresponding subzone. For example, channels in two DRCH subzones behave identically, but they do not overlap in other subzones. Thus, two subzones of the same zone carry the same channels, but they do not switch to each other. When the subzones do not intersect, partial frequency reuse (FFR) is possible, as a result of which different power values can be allocated to different subzones by neighboring sectors. FFR can be performed so that it is consistent with what neighboring sectors do. Thus, resources can be divided so that on some of them a particular sector transmits with high power, but neighboring sectors do not transmit high power in these subzones. In other subzones, neighboring sectors transmit with high power, while other sectors (for example, the particular sector referred to in the previous sentence) do not transmit with high power.

To ensure the above-described mode of operation, the subzone is synchronized, and the switching is not synchronized. In each subzone, different channels are switched randomly in multiple sectors, so that the same channel does not always conflict with the same channel in other sectors. Switching is not synchronized, but the subzones are synchronized.

System 300 may include a processor 314 operably coupled to a transmitter 302 (and / or memory 316) for executing instructions related to assigning modes, assigning zones (partially based on assigned modes), and breaking down the zones into multiple subzones. A memory 316 may store information related to instructions executed by the processor 314 and other suitable information related to resource sharing in the communication network.

The processor 314 may be a specialized processor for analyzing and / or generating information received by the transmitter 302. The processor 314 may also control one or more components of the system 300 and / or be a processor that analyzes and creates information received by the transmitter 302, as well as controls one or several system components 300.

Memory 316 may store protocols related to resource separation, zone assignment, zone division into subzones, and actions to control communication between transmitter 302 and receiver 304, so that system 300 can use stored protocols and / or algorithms for resource separation and synchronization in wireless network as described here.

It should be understood that the components for storing data described herein (eg, storage devices) may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. By way of example, but not limitation, non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which acts as an external cache. As an example, but not as a limitation, RAM is available in many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), advanced SDRAM (ESDRAM) , Synchlink DRAM (SLDRAM) and Rambus RAM (DRRAM) direct access. It is intended that the memory 316 of the options disclosed herein include, but are not limited to, these and other suitable types of memory.

Distributed zones provide maximum spacing. In a situation where resolution is desired because channel conditions cannot be predicted (for example, a fast moving channel or a fast moving user), you can use DRCH. On the other hand, if other users are to be processed, multi-user diversity may be beneficial to the system (for example, evaluate conditions and select a user who has good conditions in a certain part of the frequency band), and then BRCH can be used.

Thus, in any particular system, both DRCH and BRCH can be used. The reason for this is that in any system there may be several fast-moving users and several slow-moving users. In addition, there are data channels and control channels. In the case of control channels, the system may not be able to apply multi-user diversity, so that fast-moving users can be scheduled in distributed zones, and slow-moving users can be scheduled in block zones, and a control channel can be planned, for example, in a block zone.

For a comprehensive assessment of the features disclosed herein, refer to FIG. 4 and 5, aspects of superframe structures for a multiple access wireless communication system are shown. In FIG. 4 shows aspects of superframe structures 400 for a multiple access and frequency division duplex wireless communication system, and FIG. 5 shows superframe structures 500 for a time division multiple access (TDD) wireless duplex system.

In both FIGS. 4 and 5, the forward link transmission is divided into superframes 402 and 502. The superframe may include a preamble 404 and 504 of a superframe, followed by a series of frames, some of which are shown at 406 and 506. In the FDD system, reverse and forward transmission lines may occupy different frequency bands, so that the transmission on these lines for the most part does not overlap on any subcarriers. In a TDD system, the number of consecutive forward link and reverse link frames that can be continuously transmitted until the transmission of the opposite type of frame is permitted is determined by N forward link frames and M reverse link frames. It should be noted that the numbers N and M can vary in a given superframe or between superframes.

In both the FDD system and the TDD system, each superframe may comprise a preamble 404 and 504 of a superframe. In some embodiments, the superframe preamble includes a pilot channel containing pilot signals that can be used to estimate the channel by access terminals, and synchronization information, such as time characteristics, and other information sufficient for the access terminal to communication (for example, reception and transmission). The superframe preamble may also include a broadcast channel containing configuration information that the access terminal can use to demodulate the information contained in the forward link frame on one of the carriers, as well as information for adjusting or offsetting the base power. In other cases, only part of the above and / or other information may be in this preamble of the superframe.

As shown in FIG. 4 and 5, the preamble 404 and 504 of the superframe is followed by a sequence of frames, some of which are shown under reference numerals 406 and 506. Each frame may include the same or different number of OFDM symbols, which can form multiple subcarriers that can be used simultaneously for transmission for a certain period.

In addition, each frame may be divided such that it will have one or more subzones operating according to a symbol rate mode when one or more non-adjacent OFDM symbols, subcarriers, or combinations thereof are assigned to a user device on the forward or reverse links, and one or more subbands operating according to the block mode, when adjacent OFDM symbols, subcarriers, or combinations thereof are assigned to user devices. The subcarriers assigned to user devices associated with switching the symbol rate do not have to be contiguous throughout the frame, and they can be distributed among block users.

According to some aspects, a common frequency band can be divided into several carriers, which are subsets of a common frequency band. These carriers may contain 5 MHz from the 20 MHz band, and the carrier contains 512 subcarriers. However, other values may be used for the band, subcarriers, and carriers. In addition, the number of subcarriers allocated for each carrier may vary, so that the number of subcarriers in each carrier may differ from carrier to carrier, or one carrier may have more subcarriers than other carriers. In addition, it should be noted that one or more carriers may be asynchronous with respect to each other (for example, have different start and end times for its forward link frame and / or reverse link frame). In these cases, signaling or assignment messages may transmit timing information in a control channel or superframe preamble for a particular carrier.

According to other aspects, a carrier may comprise a band of 1.25 MHz (i.e., have 128 subcarriers) or 2.5 MHz (e.g., have 256 subcarriers). It should be noted that the number of subcarriers may vary from carrier to carrier. In addition, the size of the frequency band is limited by the corresponding frequency bands and their boundaries established by the relevant state regulatory bodies.

The actual size of the superframe preamble in OFDM symbols, depending on the number of frames and OFDM symbols per frame, may vary depending on the system deployment option to provide sufficient opportunities for demodulation of the information supported in the superframe preamble while maintaining sufficiently low overhead.

Turning to FIG. 6, aspects of a frame 600 for a multiple access wireless communication system are shown. Each frame 600 forward link can be divided into many segments. One of them, the control channel, containing sections 602, 604, 606 and 608, which may, but not necessarily, contain an adjacent group of subcarriers, has a variable number of subcarriers assigned depending on the required amount of control data and other considerations. The remaining sections are usually available for data transfer. These sections may contain subcarriers assigned either to users associated with the symbol rate switching mode or block users, both of which may occupy one frame together or be dispersed across multiple frames. That is, for data transmission, adjacent sub-carriers, in the case of block users, or adjacent sub-carriers and / or non-adjacent sub-carriers, in the case of users associated with a symbol rate switching mode, can be assigned. This can be done dynamically for each frame based on the signaling in the control channel.

According to some aspects, the dynamic separation indicated by the signaling (for example, in a frame control channel) shows how many subcarriers are allocated for operation in the symbol rate control mode, and it can be assumed that the remaining subcarriers are block mode subcarriers. According to other aspects, some global (throughout the use case) permutation of subcarriers is possible, for example, P (1) ... P (B), where B is the total number of subcarriers in the system. An indication of K subcarriers as subcarriers for use in symbol rate mode will mean that subcarriers P (1), P (2), ..., P (K) will be used in symbol rate control mode, while the rest subcarriers will be used in block mode. For each OFDM symbol, the same or different permutation P (.) Can be used to divide the subcarriers of this symbol into a symbol rate control mode (distributed resource channel area) and block transmission rate control mode (block resource channel zone).

According to additional aspects, scheduling using subbands can be applied so that adjacent groups of subcarriers or groups consisting of both non-adjacent and adjacent subcarriers can be distributed as a group for communication in a symbol rate control mode or block mode. When applying scheduling using subbands, it is possible to provide better scheduling of frequency selective channels for users. When applying scheduling using subbands, those subbands that are used for the symbol rate switching mode have common pilots used by all users that are scheduled in that subband, that is, in the symbol rate control mode. Those users who are scheduled in subbands for block mode do not use common pilot signals, but can use pilot symbols in blocks, so users planned in blocks use only pilot signals from this block, and users in other blocks do not the need to use these pilot signals.

According to other aspects, quasistatic separation may be used. In these aspects, the number of subbands in the symbol rate control mode is an overhead parameter specified in a superframe preamble (for example, a broadcast channel). According to another aspect, whenever more than one subband is allocated for a symbol rate switching mode, a mode may be set for scheduling users for all subbands related to symbol rate switching (e.g., subbands or subband groups allocated for the symbol rate switching mode) characters), resulting in a higher degree of diversity. The implementation of the above can be achieved by determining the switching sequence as a function of the number (set) of subbands in the symbol rate control mode. Another mode can be achieved by localizing switching to a given subband (for example, an adjacent group or a distributed subcarrier band).

The control channel may include one or more pilot channels 302 and 304. In the symbol rate control mode, pilot channels may be present in all OFDM symbols in each forward link frame or only in subbands that are allocated for transmission in the symbol rate control mode. In both cases, there may be a signaling channel 306 and a power control channel 308 in the control channel. Signaling channel 306 may include assignment, acknowledgment, and / or reference values and power settings for transmitting data, control, and pilot on the reverse link. Channel 308 power control can carry information related to interference created in other sectors due to transmissions from access terminals in this sector.

It should be noted that when multiple transmit antennas can be used to transmit from a sector, different transmit antennas must have the same temporal characteristics of the superframe (including the superframe index), the characteristics of the OFDM symbols and the switching sequence.

In some aspects, channel 302, 304, 306, and 308 may have the same distribution in the form of data transmission (for example, if the data transfer is in block mode, then blocks of the same or different sizes may be allocated to the control channel).

Turning to FIG. 7, aspects of a resource sharing scheme for a multiple access wireless communication system are shown.

In FIG. 7, the wireless communication system is divided into several interlaces (for example, interleaving, consisting of frames X ₁ , X ₂ and X ₃ , and interleaving, consisting of frames Y ₁ , Y ₂ and Y ₃ ). The number of interlaces and frames per interlace can vary depending on the deployment option of the system. In addition, the number of frames per interlace may be different for different interlaces, and may also change over time due to the scheduler or due to system changes.

In FIG. 7, each frame contains block mode zones 700 and distributed mode zones 705. Block mode zones 700 comprise users having adjacent OFDM symbol assignments, subcarriers, or combinations thereof. Distributed zones 705 contain users that have non-contiguous assignments of OFDM symbols, subcarriers, or combinations thereof.

As discussed above, assignments in distributed mode zones may contain distributed symbol-subcarrier combinations in a zone, while assignments in block zone 700 contain adjacent symbol-subcarrier combinations in a zone. In some aspects, zones 700 and 705 may comprise a subband (e.g., a predetermined number of subcarriers). In addition, the number of subcarriers per zone 700 and 705 may vary from frame to frame. In addition, the location of the zones may vary from frame to frame.

According to alternative aspects, the location of zones 700 and 705 may be planned through the network. For example, sectors and / or cells adjacent to each other can have fixed locations in the frequency band for zones 700 and 705, so that users associated with the symbol rate switching mode will only interfere with other users associated with character switching mode, but not for users associated with block mode.

According to yet another aspect, in interleaving X, the first L (physical) groups of subcarriers 710 (e.g., groups of 16 subcarriers) are grouped together to form a block zone 700, while groups of the same size are typically used to form distributed zones (not shown). According to one aspect, the grouping of groups of subcarriers 710 forming a zone can be based on the inverse bit order of location in the spectrum of groups of subcarriers 710. That is, each group of subcarriers 710 can be assigned a number expressed in bits (for example, if there are 8 zones, then each zone will have a 3-bit index). Therefore, for block mode users, frequency diversity can be achieved by reversing the order of the bits in the index. Frequency spacing can be further improved by hopping frequencies assigned to users in block mode between different zones 700 on a frame-by-frame basis, on an interleaving basis, or on some other basis. According to another aspect, groups 710 for each zone can be distributed over the entire frequency band (for example, at regular intervals).

In addition, according to some aspects, zones 700 and 705 may form subzones, which may be groups of adjacent subcarriers having their own resources, which are assigned to one of the modes: block or distributed. According to other aspects, a plurality of subcarrier groups 710 may comprise a subband (e.g., one subband may include N groups). In one aspect, a user may plan to communicate in a particular subband based on channel conditions or selected preferences. According to additional aspects, when using channel trees, each subband can have its own channel tree for planning, which allows one or more users to “jump” through this tree for a given subband, regardless of users working on other subbands.

At another interlace Y (eg, interleaving after X), the block zone 700 may cyclically shift by j subbands or blocks relative to the interlace X. The cyclic shift may vary with each interlace frame, be constant for each interlace frame, or may contain one cyclic shift for all frames interleaving. If there are more interlaces, then one cyclic shift may occur.

It should be noted that zones 700 and 705 can be synchronized across sectors. This may be provided in order to be able to estimate interference and implement partial frequency reuse (FFR).

According to one aspect, at each interleaving, each zone 700 or 705 can be further divided into one or more subzones that form a plurality of groups 710. In the subzone used in the block mode zone, each subzone includes adjacent groups 710 in this zone. You can number in the natural order of the spectral arrangement of groups 710 in the zone. According to some aspects, the subzone may form a subband, with each zone forming a plurality of subbands.

According to a further aspect, the subzone of the distributed zone 705 includes consecutive groups in that zone, numbered in the reverse bit order of their spectral location or in the natural order of their spectral location. According to another aspect, groups 710 for each subzone can be distributed in a strip (e.g., with a uniform arrangement).

In one aspect, a distributed channel may include 16 tones per OFDM symbol. According to a further aspect, each channel may be switched in a distributed subzone (in symbol rate), with each OFDM symbol, or in some other way. According to other aspects, a block channel may include a 16-tone fragment of 8 OFDM symbols. According to a further aspect, each channel may be switched in a block subzone with a slot frequency (e.g., each slot), which may contain some or all OFDM symbols of a given frame.

According to some aspects, channel switching in a subzone is performed independently by sector. In addition, when using the channel tree, each block and distributed subzone can be represented as a sub-tree (for example, a group of subsequent base nodes and their parent nodes) of the channel tree, which can be assigned to the subzone. The mapping of channel nodes to channel resources in a subzone can be performed independently by sector.

It should be noted that the zones may include two-dimensional combinations of OFDM symbols and subcarriers. In these cases, for block mode, the zone or subzone may not include all OFDM frame symbols and a number of subcarriers. According to one exemplary aspect, a subzone may include 16 subcarriers of 8 OFDM symbols and may be equivalent to one block. According to some aspects, when finding a zone or subzone in one frame, the channel tree can be used to assign resources, and in this case each node can correspond to a two-dimensional combination of OFDM symbols and subcarriers, which can correspond to a zone, subzone, or a smaller block of a two-dimensional combination.

In one aspect, as discussed above, zones can be used to support FFR. In these cases, a set of FFR ports (for example, a resource shared for an FFR operation) may include a set of pairs (subzone, interleaving). A sector can sense a certain power on each set of ports. On some sets of ports, high power is transmitted, while on others, low power is transmitted. The goal is for these port sets to be partially or fully synchronized between neighboring sectors. In one aspect, to support increased diversity of BRCH distributed and block subzones, they must belong to different sets of ports. According to additional aspects, the sets of ports can be defined so as to provide a sweep of the entire frequency band across multiple interlaces. In addition, in some cases, different sectors use different power profiles on different port sets (PBPs) to provide additional diversity.

In one aspect, access terminals report channel quality information, which may differ from one set of ports to another. In addition, channel quality information can be based on long-term interference observation on a given set of ports. According to a further aspect, in order to enable long-term interference measurements, one or more zero pilot signals may be used in each subzone or block. Although it is possible that this will not be required.

In FIG. 8 illustrates an example system 800 that enables resource sharing and synchronization for a wireless communication system. System 800 includes one or more transmitters 802 that are in wireless communication with one or more receivers. Transmitter 802 is similar to transmitter 302 of FIG. 3 and includes a splitter 806 that assigns a mode to the user (such as receiver 804). The mode can be block or distributed. The determination of the mode can be performed based on the control of the type of channel that the user is using, the type of traffic that is currently being provided to the user, as well as other factors.

In addition, the transmitter 802 has a scheduler 808, which can be configured to determine the user area. Zone determination can be performed in part based on user mode compliance. Each zone may include at least one subband. A subzone generator 810 can divide a zone into multiple subzones. As used herein, the term “zones” refers to a type of switching (symbol rate switching or block rate switching), each zone may include multiple subzones. Resource switching refers to specific subzones that need to be synchronized across multiple sectors.

There are at least two ways of dividing resources into BRCH and DRCH subzones. The first way is to arbitrarily select subcarriers based on the permutation. Another approach is to select groups of subcarrier blocks that belong to the same zone. In this case, the subcarriers are divided into a small number of subbands. Each subband includes a number of Q subcarriers. Then, in some order, each of these subbands is selected, creating a permutation by subzones rather than by individual subcarriers. Based on this permutation, the first few subbands are identified, and for these subbands, a switching or permutation and switching mode is declared, for example, a DRCH switching or permutation and switching mode. The remaining subbands may be identified and claimed to use other types of permutation and switching.

To synchronize each user in accordance with this mode and zone, a synchronizer 812 can be configured. The permutation that can be used for the specified subcarriers or zones is the reverse bit order. For example, but not as a limitation, the number of elements to be divided may be a power of two. If there are 16 subcarriers or 16 subbands that need to be divided, these subcarriers or subbands can be labeled in binary. After they are marked in binary, the order of the bits can be replaced or reversed to provide permutation. To obtain a uniform selection of resources from a common set of resources, the first few subcarriers or subbands may be selected in the indicated reverse bit order. In some aspects, the set of subcarriers that are selected to switch the symbol rate, or BRCH, is evenly distributed, so that the subcarriers are selected at regular intervals from a common set of subcarriers.

Reverse bit ordering is a way to allocate subzones, with a reverse two-bit order usually being used; however, the number of zones may not be equal to degree 2. The reverse order of bits is determined for the case when the number of entries in the table required for permutation is equal to two. When the number of records N is equal to a power of two, each index can be represented by one bit, and the records can be easily rearranged using the inverse bit version of the index. For example, if the size of the table is 8, then the number 4 of the record can be represented as 100. After reversing the bits, this record will look like 001, which is “1”. In other words, in this example, 4 is rearranged to 1, and so on. The rotation of the bits leads to the achievement of the distribution of elements (for example, subbands) in a more or less uniform order. For example, to perform a bit reversal in a table from 0 to 8, the first record “0” is a bit “0”, and therefore remains in its original position. Then the second record “1”, which follows “0”, will move to 4 (for example, 001 goes to 100) and will now be in the middle of the table. The next entry 2 (representing 010) will go to the middle, etc. Thus, when the bit is reversed, continuous elements are taken, in this case a frequency band, and they are trying to distribute them throughout the strip as evenly as possible. It should be recalled that this is not a switch. In another example, the total number of control bandwidth sizes corresponds to 8 subbands. However, there should be only 3 subbands, for example, belonging to specific zones, and it is desirable that they be distributed and not appear together in a particular part of the spectrum. One way to distribute them is to evenly distribute when the total available frequency band is divided into several zones, and the carrier is determined. When reversing bits, this is done in a slightly different way, but the same goal is achieved, consisting in the distribution of elements over the entire frequency band.

When the bit is accessed, elements are taken that are adjacent, and they are placed away from each other. The advantage is that different sectors take different numbers of subzones for DRCH. For example, for one sector, 4 subbands of 8 subbands are selected for DRCH, and 2 subbands of 8 subbands are selected for BRCH. When using a bit reversal based permutation to perform mapping, the first two subzones will be synchronized across both sectors. Perhaps this will not be a sample at regular intervals.

However, there may be many situations where records are not degree 2. In this situation, bits are inverted and the number of indices is tied to the nearest (or maximum) degree 2. Thus, the number of zones or subbands need not be equal to degree 2, and the algorithm can implement a function similar to bit reversal or truncated bit reversal. Methods associated with an interleaver performing truncated bit reversal are described in US Patent Application No. 11/022485, PRUNED BIT-REVERSAL INTERLEAVER, filed on December 22, 2004.

Two sectors may occupy different amounts of resources for BRCH or DRCH. For example, if the first sector takes 5 subbands and the other sector takes 2 subbands, all these subbands will not be synchronized, because their number is different. However, at least two selected subbands are synchronized. If the number of indicated subbands is the same, then full synchronization will be ensured, but if different, then the best synchronization option will be used in this situation, taking into account the fact that each of the sectors has additional bands.

According to some aspects, a synchronizer 814 may be configured to synchronize each user according to a mode and a zone in accordance with quasi-uniform intervals between tones in a distributed mode. The goal is to ensure that distributed mode tones (DRCH) are evenly distributed across the entire set of available tones. Thus, for example, when there is a certain number of tones available (other than guard tones), a certain number of tones belonging to the DRCH or distributed zone can be distributed within the available tones. The goal is to ensure uniform distribution, but the problem is that in some cases, depending on how many tones are allocated for DRCH compared to the number of tones available (also defined as guard tones), a strict distribution may not be achieved. The reason for this is that the ratio of the number of tones available to the number of tones belonging to the zone may not be an integer.

Thus, in distributed mode, a quasi-uniform arrangement of tones or subcarriers is possible. For example, if the total number of tones available is M * n, and the total number of distributed tones is M * m (M tones per channel, M = 16 in Ultra Mobile Broadband (UMB)), then p and q are as follows:

n = p * m + q (0 <= q <m)

The first m tones of the distributed zone are located in the first block of n available tones, so there are q options for the interval (p + 1) and (m-q) options for the interval p. The second m tones of the distributed zone are located in the second block of n available tones with the same positions of m tones as in the first block, on n available tones. To select subcarriers for a DRCH zone or to select groups of subcarriers / subbands / subbands included in a zone, permutation-based methods and quasi-regular arrangement methods can be used. These schemes can also be used to select the subcarriers included in each DRCH subzone (as opposed to the zone).

It should also be noted that the requirement for partial synchronization at base stations can be used to implement FFR. In other words, if the first base station uses M subcarriers in its DRCH zone, and the second (neighboring) base station uses N subcarriers in its DRCH zone, then the DRCH zone of two base stations must have overlaps of min (M, N) subcarriers. Similar reasoning can be applied to DRCH subzones. Similarly, if neighboring base stations use the M and N DRCH subbands (of the same size), respectively, then the separation of the resources of the two base stations must coincide with each other on the min (M, N) DRCH subbands. These partial synchronization requirements can be met using the permutation based methods discussed above. However, it should be noted that the quasiregular arrangement method discussed above does not satisfy the partial synchronization criterion, although it does satisfy the full synchronization requirement (a special case of synchronization requirements when M = N).

As an example, but not as a limitation, since the channels are distributed in blocks of 16, the total number of available tones from which the distributed zone is selected will also be a multiple of 16. Thus, the space of all available tones is divided into 16 groups. In each of these 16 groups, the middle channel will have one tone, since each channel includes 16 tones. First, distributed tones in the first group, which are the leading tones for each channel in the first group, are determined. Then, the remaining 15 tones are calculated for each channel at the same position in the corresponding 15 groups.

In another example, if there are five channels to be allocated, then first the frequency band (which may be 11 * 16) is divided into 16 adjacent groups. Each distributed channel will have 16 channel signals, with each distributed channel will have one tone in each group. Any given channel, consisting of 16 tones, should have evenly distributed tones. Therefore, there will be 5 distributed channels, and each group in each channel will contain 16 tones. If in this place there is 1 tone in the first channel, then the remaining 15 tones of the same channel will be in the remaining 15 groups in the same place. For the next channel, once the location of channel 1 is determined, it will be the same for the remaining 15 groups. Thus, instead of distributing all 5 * 16 tones, all you need to do is decide how to distribute 5 tones for 5 channels (set 1 tone per channel) in the first subset of the group consisting of 11 tones. After determining the location for the first tone of each channel in the first group, the remaining 15 tones are duplicated in the remaining groups.

If in the above example the group size is a multiple of the number of channels (for example, the group size is 10 and the number of channels is 5), then they are placed in step 2. If there is no multiplicity (for example, the group size is 11 and the number of channels is 5), there will be three an interval of size 2 and one interval of size 3 (quasi-uniform arrangement).

In some aspects, the offset or position of all tones changes as you move from one OFDM symbol to another. Therefore, the distributed mode is sometimes called switching symbol rates (for example, switching occurs when switching from one character to another). Thus, situations may arise when for a particular channel all its modulation symbols will be grouped in pairs, and in each pair the channel conditions for the modulation symbol will be as uniform as possible. To achieve this, instead of switching with each character, switching occurs every two characters. For example, symbol 0 will have a certain tone, and the exact same one is used for symbol 1. When you go to symbol 2, the tone “jumps” to a new place, and symbol 3 remains in the same place. Then the tone changes in symbol 4, etc. Thus, instead of simply switching the transmission speed (for each symbol), switching is performed every 2 symbols, and each pair of adjacent (even and odd) OFDM symbols will have the same tone.

In some aspects, different channels have different switching frequencies. So, some channels switch with each character, while other channels switch every two characters, etc.

Turning now to FIG. 9, which shows a method that enables the separation of resources. Although for simplicity of explanation this method is shown and described as a sequence of blocks, it should be clear that the claimed subject matter is not limited by the number or order of blocks, and some blocks may appear in a different order or in parallel with other blocks, unlike what is shown here and described. In addition, not all of the blocks shown may be required to implement the method described herein. It is valuable that the functionality associated with these blocks can be implemented by software, hardware, a combination of them or any other suitable means (for example, using a device, system, process, component). In addition, it should be emphasized that the methods disclosed herein and their detailed description can be stored in an industrial product, which makes it possible to transport and transfer these techniques to various devices. It will be apparent to those skilled in the art that a technique can alternatively be represented as a sequence of interrelated states or events, for example, as a state diagram.

At 902, the users (or a series of users) that are scheduled for the subframe are determined. This operation may be performed on the forward or reverse link and may be based on queries, pre-existing definitions, or combinations thereof. In addition, the period in question may be a superframe, one frame, or some other period or time interval.

After determining the number of users in step 904, a separation of resources is performed. Resources can be divided into one of at least two modes, which include switching the symbol rate (also called “distributed resource channels”) and switching the block rate (which is also called “block resource channel”). The mode (distributed or block) can be determined according to channel conditions that were previously reported (for example, channel quality indicators (CQI) from users) or based on other criteria, including quality of service and other factors that can be taken into account when assigning a mode . In addition, the mode assignment could be determined earlier, and it may remain constant depending on the parameters of the user and the system.

The mode can be determined based on how much of the resources are needed to operate in the symbol rate control mode or the block rate control mode. For example, subcarrier separation can be determined, and the first part of the permutation results can be declared as part of the symbol rate switching subzone, and the remaining results will become part of the block rate switching subzone. Thus, a rule is determined by which the first part of the permutation results is allocated to the same zone. A similar process can be used to further divide the zones into multiple subzones. Individual carriers can be processed independently, or groups of subcarriers can be processed in a block form, which makes it possible to ensure that a group of subcarriers belongs to the same subzone. In a number of aspects, subcarrier groups are not divided into separate subcarriers, but into several carriers. A group may contain individual carriers that are arbitrarily selected.

Thus, to create a zone, a subset of carriers can be selected in some random order or by rearrangement. Then, for example, the first eight zones are selected, for example, so that they belong to the DRCH zone or the symbol rate switching zone, and the remaining subcarriers belong to the block transmission rate switching zone. Block channels or distributed channels are created in these zones.

Distributed zones provide maximum spacing. The idea of block switching and symbol switching (DRCH \ BRCH) refers to a situation where diversity is desired due to the impossibility of predicting channel conditions (for example, a fast moving channel or a fast moving user), and then you can use DRCH. On the other hand, to obtain the benefits of multi-user diversity (for example, viewing channel conditions and selecting a user who has a good channel condition in a certain part of the frequency band), you can use BRCH.

Thus, in any particular system, both DRCH and BRCH can be used. The reason for this is that in any system there can be several users moving fast and several users moving slowly. There are data channels and control channels. For control channels, multi-user diversity may not be applicable, so that fast moving users can be scheduled in a distributed zone, slow moving users can be scheduled in a block zone, and a control channel is planned, for example, in a block zone.

At 906, the shared resources are synchronized among multiple sectors, so that in a particular set of resources, all sectors in the same area (e.g., geographic area) use the same means of functioning (switching symbol rates or switching block rates), which can provide some stability. Synchronization may include a zone definition, and resources can be switched in a given zone. For example, if the zones in different sectors are identical, then in these zones you can use the partial frequency reuse method. Partial frequency reuse may result in some sectors in certain areas transmitting at a low power level, and neighboring sectors in these zones will transmit at a high power level. Thus, in sectors it will be possible to avoid the use of high power in those areas that are currently used by other sectors. At step 908, the user is scheduled to work according to this mode and zone, for example, using a switching algorithm or other approach.

In FIG. 10 is a block diagram of an embodiment of a transmitter system 1010 (also known as an access point) and a receiver system 1050 (also known as an access terminal) in a MIMO system 100. In transmitting system 1010, traffic data for multiple data streams comes from a data source 1012 to a transmit (TX) data processor 1014.

In some aspects, each data stream is transmitted through a respective transmit antenna. TX data processor 1014 formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to obtain encoded data.

The encoded data for each data stream may be multiplexed with pilot data using OFDM technologies. The pilot data is typically a known data pattern that is processed in a known manner and can be used in a receiving system to estimate channel performance. Then, the multiplexed pilot data and encoded data for each data stream are modulated (e.g., by symbol mapping) based on a particular modulation scheme (e.g., BPSK (binary phase shift keying), QSPK (phase shift keying with quaternary signals), M-PSK (M positional phase shift keying) or M-QAM (M-position quadrature amplitude modulation)) selected for this data stream to obtain modulation symbols. The data rate, coding, and modulation for each data stream may be determined by instructions executed by processor 1030.

The modulation symbols for all data streams are then fed to a TX MIMO processor 1020, which can further process modulation symbols (for example, for OFDM). Next, the TX MIMO processor 1020 provides N _T modulation symbol streams to N _T transmitters (TMTRs) 1022a through 1022t. In some embodiments, the TX MIMO processor 1020 uses weighting symbols for beamforming data stream symbols, and also indicates the antenna with which the symbol is currently being transmitted.

Each transmitter 1022 receives and processes a corresponding symbol stream to provide one or more analog signals and further normalizes (e.g., amplifies, filters, and upconverts) these analog signals to obtain a modulated signal suitable for transmission over the MIMO channel. Then, N _T modulated signals from transmitters 1022 a through 1022 t are transmitted from N _T antennas 1024 a through 1024 t, respectively.

In the receiving system 1050, the transmitted modulated signals are received by N _R antennas 1052a through 1052r, and the signal received from each antenna 1052 is sent to a respective receiver (RCVR) 1054a through 1054r. Each receiver 1054 normalizes (for example, filters, amplifies, and downconverts) the corresponding received signal, digitizes the normalized signal to obtain samples, and further processes these samples to create a corresponding “received” symbol stream.

Then, the RX data processor 1060 receives and processes the N _R received symbol streams from N _R receivers 1054 based on a particular reception processing method to create N _T “detected” symbol streams. Next, the RX data processor 1060 demodulates, deinterleaves, and decodes each detected symbol stream to recover traffic data for the data stream. The processing performed by the RX data processor 1060 is complementary to the processing performed by the TX MIMO processor 1020 and TX data processor 1014 of the transmitting system 1010.

The processor 1070 periodically determines which precoding matrix should be used (discussed below). The processor 1070 generates a reverse link message comprising a matrix index portion and a rank value portion.

The reverse link message may contain various types of information related to the communication link and / or the received data stream. The reverse link message is then processed by TX data processor 1038, which also receives traffic data for multiple data streams from data source 1036, is modulated by modulator 1080, normalized by transmitters 1054a through 1054r, and transmitted back to transmitting system 1010.

In transmitter system 1010, modulated signals from receiver system 1050 are received by antennas 1024, normalized by receivers 1022, demodulated by demodulator 1040, and processed by RX data processor 1042 to extract the reverse link message transmitted by receiver system 1050. Then, processor 1030 determines which precoding matrix to use to determine the weights for the formation of the rays, and then processes the selected message.

Turning to FIG. 11, an example system 1100 for sharing and synchronizing resources is shown. System 1100 may be at least partially located, for example, at a base station. It is valuable that the system 1100 is presented in the form of functional blocks included therein, which may represent functions implemented by a processor, software, or a combination thereof (e.g., hardware and software).

System 1100 includes a logical grouping 1102, the electrical components of which can act independently or together. For example, logical grouping 1102 may include an electrical component for dividing resources into one of two modes 1104. These modes may be block mode or distributed mode. In addition, logical grouping 1102 may include an electrical component for synchronizing shared resources among multiple sectors 1106. Also, an electrical component for communicating with a user according to said mode and synchronization 1108 may also be included in this group. This communication may include transmitting signals to the user or receiving signals from the user.

According to some aspects, an electrical component for dividing resources into one of two modes 1104 further allocates a first group of subcarriers to operate in a data rate control mode and assigns a second group of subcarriers to operate in block mode. In addition, or alternatively, an electrical component for synchronizing shared resources among a plurality of sectors 1106 also defines a zone, in part based on said mode. According to some aspects, the zone may be determined in accordance with a cyclic shift relative to the previous interleaving. An electrical component for synchronizing shared resources among a plurality of sectors 1106 can further partition a zone into a plurality of subzones and distribute these subzones using a reverse bit order or quasi-uniform tone distribution. Each subzone may contain a subband of subcarriers.

In addition, system 1100 may include a memory 1110 that stores instructions for performing functions associated with electrical components 1104, 1106, and 1108 or other components. Although the memory 1110 is shown here as external, it should be understood that one or more electrical components 1104, 1106, and 1108 may be located in the memory 1110.

It is clear that the specific order or hierarchy of steps in the processes disclosed here is only an example illustrating some possible approaches. It is clear that the specific order or hierarchy of steps in these processes can be changed based on the preferences of the developer, without going beyond the scope of the present invention. The claims that accompany the disclosed method represent the elements of the various steps in an exemplary order and do not mean that it comes down to the presented specific order or hierarchy.

Those skilled in the art will appreciate that information and signals can be represented using any of a variety of diverse technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any of them a combination.

In addition, those skilled in the art should understand that the various illustrative logical blocks, modules, circuits, and algorithmic steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations thereof. To more clearly illustrate this interchangeability of software and hardware, various illustrative components, blocks, modules, circuits, and steps have been described above, proceeding, as a rule, from their functional purpose. Which means (hardware and / or software) the specified functionality will be implemented depends on the particular application and design restrictions imposed on the system as a whole. Specialists in the art can implement the described functionality in various ways, based on each specific application. But these technical solutions should not be interpreted as a possible departure from the scope of the present invention.

The various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented or implemented using a general-purpose processor, digital signal processor (DSP), application-specific specialized integrated circuit (ASIC), a user-programmable gate array ( FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform is described functions here. A general-purpose processor may be a microprocessor, and in an alternative embodiment, the processor may be any standard processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other specified configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, a software module executed by a processor, or a combination thereof. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a compact disc (CD-ROM), or any other form of media known in the art technicians. A medium is associated with the processor, so that the processor can read information from it and write information to that medium. In an alternative embodiment, said medium may be an integral part of the processor. The processor and media may reside in an ASIC. An ASIC may reside in a user terminal. In an alternative embodiment, the processor and the medium may reside as discrete components in a user terminal.

The previous description of the disclosed embodiments is provided to enable those skilled in the art to make or use the present invention. Various modifications to these embodiments should be readily apparent to those skilled in the art, and the fundamental principles defined herein may be applied to other embodiments without departing from the spirit and scope of the invention. Thus, it is not intended here that the present invention be reduced to the embodiments shown here, but it should correspond to the broadest possible scope consistent with the principles and new features disclosed herein.

When implemented by software, the methods described here can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described here. Program codes can be stored in memory blocks and executed by processors. The memory unit can be implemented in the processor or be external to the processor, in which case it can be connected by a communication line to the processor using various means known in the art.

In addition, the various aspects or features described herein may be implemented as a method, device, or industrial product using standard programming and / or engineering design methods. The term “industrial product” as used herein is intended to encompass a computer program accessible from any computer-readable device, medium, or medium. For example, a computer-readable medium may include, but not limited to: magnetic storage devices (eg, hard disk, floppy disk, magnetic strips, etc.); optical disks (e.g., compact disc (CD), digital versatile disk (DVD), etc.), smart cards and flash memory devices (e.g. EPROM, card, flash memory card, key drive, etc.) d.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term “machine-readable medium” may include, but not limited to: wireless channels and other various media capable of storing, storing and / or carrying command (s) and / or data.

All that has been described above includes examples of one or more embodiments of the invention. Of course, it is not possible to describe every reasonable combination of components or techniques to disclose the above embodiments, but those skilled in the art should recognize that many additional combinations and combinations of various embodiments are possible. Accordingly, it is intended that the described embodiments cover all of these alternatives, modifications, and variations that are within the scope of the appended claims. Since the term “includes” is used in the detailed description or in the claims, it is intended here that the term is encompassing in nature similar to the term “comprising” and is interpreted as “comprising” when used as a transition word in the claims. In addition, as used in the detailed description of the claims, the term "or" means "not exclusive" or "".

Claims (34)

1. A method for sharing network resources in a wireless communication system, comprising the steps of:
share resources in different operating modes;
synchronize shared resources among multiple sectors; and communicating with the user according to said modes and synchronization. 2. The method according to claim 1, in which the separation of resources into modes comprises the steps of
allocating a first group of subcarriers to operate in a symbol rate control mode; and
assign a second group of subcarriers to operate in block mode. 3. The method according to claim 2, in which the dynamic separation indicated by signaling indicates the first group of subcarriers, and the remaining subcarriers are assigned as the second group of subcarriers. 4. The method according to claim 2, in which there is a quasi-uniform arrangement of subcarriers. 5. The method of claim 1, wherein the modes include block mode or distributed mode. 6. The method according to claim 1, wherein the step of synchronizing shared resources among a plurality of sectors comprises the steps of determining a zone partially based on the modes;
break a zone into many subzones; and
subbands are allocated using the reverse bit order or quasi-uniform tone distribution. 7. The method of claim 6, wherein the bit inversion is a truncated bit inversion. 8. The method according to claim 6, in which each subzone contains a subband of subcarriers. 9. The method according to claim 6, in which the zones are determined according to a cyclic shift relative to the previous interleaving. 10. The method according to claim 1, wherein the step of communicating with the user comprises the step of transmitting signals to the user or receiving signals from the user. 11. A device for dividing network resources in a wireless communication system, comprising
a processor that executes instructions for dividing resources into one of two operational modes, synchronizing shared resources among multiple sectors, and communicating with a user according to the modes and synchronization; and
a memory that stores information related to instructions generated by the processor. 12. The wireless communications apparatus of claim 11, wherein the processor further executes instructions for allocating a first group of subcarriers to operate in a symbol rate control mode and assigning a second group of subcarriers to operate in block mode. 13. The wireless communications apparatus of claim 12, wherein the dynamic separation indicated by signaling indicates a first group of subcarriers, and the remaining subcarriers are assigned as a second group of subcarriers. 14. The wireless communication device according to item 12, in which there is a quasi-uniform arrangement of subcarriers. 15. The wireless communications apparatus of claim 11, wherein the modes include block mode or distributed mode. 16. The wireless communications apparatus of claim 11, wherein the processor further executes instructions for determining the zone in part based on a mode, dividing the zone into a plurality of subzones, and allocating subzones using reverse bit order or quasi-uniform tone distribution. 17. The wireless communications apparatus of claim 16, wherein the bit reversal is a truncated bit reversal. 18. The wireless communications apparatus of claim 16, wherein each subzone comprises a subcarrier subband. 19. The wireless communications apparatus of claim 17, wherein the zones are determined according to a cyclic shift with respect to the previous interleaving. 20. The wireless communications apparatus of claim 11, wherein communicating with the user comprises transmitting signals to the user or receiving signals from the user. 21. A device for wireless communication in a wireless communication system, comprising
means for dividing resources into one of two operating modes;
means for synchronizing shared resources among multiple sectors; and
means for communicating with a user according to said modes and synchronization. 22. The wireless communications apparatus of claim 21, wherein the means for dividing resources into modes further allocates a first group of subcarriers to operate in a symbol rate control mode and assigns a second group of subcarriers to operate in block mode. 23. The wireless communications apparatus of claim 22, wherein the dynamic separation indicated by the signaling indicates a first group of subcarriers, and the remaining subcarriers are assigned as a second group of subcarriers. 24. The wireless communications apparatus of claim 22, wherein the quasi-uniform arrangement of subcarriers occurs. 25. The wireless communications apparatus of claim 21, wherein the modes include block mode or distributed mode. 26. The wireless communications apparatus of claim 21, wherein the means for synchronizing the divided resources among the plurality of sectors further determines the zones in part based on the indicated modes, splits the zone into multiple subzones, and distributes the subzones using the reverse bit order or quasi-uniform tone distribution. 27. The wireless communications apparatus of claim 26, wherein the bit inversion is a truncated bit inversion. 28. The wireless communications apparatus of claim 26, wherein each subzone comprises a subcarrier subband. 29. The wireless communications apparatus of claim 26, wherein the zones are determined according to a cyclic shift with respect to the previous interleaving. 30. The wireless communications apparatus of claim 21, wherein communicating with the user comprises transmitting signals to the user or receiving signals from the user. 31. A computer-readable medium having computer-executable instructions stored on it that, when executed by a processor, causes the processor to implement a method for sharing network resources in a wireless communication system, the method comprising the steps
separation of resources into block mode or distributed mode;
synchronization of shared resources among multiple sectors; and
communication with the user according to the specified modes and synchronization. 32. The computer-readable medium of claim 31, wherein the instructions further provide
distribution of a first group of subcarriers for operating in a symbol rate control mode; and
assignment of a second group of subcarriers for operation in block mode. 33. The computer-readable medium of claim 31, wherein the instructions further provide
zone definition according to the specified mode;
breakdown of the zone into many subzones; and
subband distribution using reverse bit order or quasi-uniform tone distribution. 34. An access point capable of operating in a wireless communication system, the access point comprising a processor configured to
allocating a first group of subcarriers to operate in a symbol rate control mode;
assigning a second group of subcarriers to operate in block mode;
zone definition according to the specified operating mode;
partitioning a zone into multiple subzones; and
subband distribution using reverse bit order or quasi-uniform tone distribution.

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