CN113014369B - Method for determining resource unit, method for transmitting related information of resource unit and corresponding device - Google Patents
Method for determining resource unit, method for transmitting related information of resource unit and corresponding device Download PDFInfo
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- 238000004891 communication Methods 0.000 description 13
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The embodiment of the invention provides a method for determining a resource unit, a method for transmitting related information of the resource unit and a corresponding device, wherein the method for determining the resource unit comprises the following steps: the station decodes an 8-bit resource unit configuration signal in the HE-SIG-B common field, wherein the 8-bit resource unit configuration signal conforms to a structured resource unit configuration rule; and determining a resource unit for the station according to the decoded 8-bit resource unit configuration signal and the position of the user-specific field for the station; wherein the structured resource unit configuration rule supports a maximum of 8 users on resource units greater than or equal to 106-tones. By using the technical scheme, the 8-bit resource unit configuration signal can support more than 4 MU-MIMO users.
Description
Technical Field
The present invention relates generally to wireless network communications, and more particularly to HE-SIG-B common field formats and indications.
Background
As the demand for wireless communications continues to increase, the world has benefited from the evolution of the IEEE 802.11 wireless network standard to accommodate the ever-increasing data usage by more and more users. The latest 802.11ax will enable high efficiency (HIGH EFFICIENCY, HE) networks. It aims to handle higher data rates and higher user loads. The system uses orthogonal frequency division Multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) and Multi-user Multiple-Input and Multiple-Output (MU-MIMO).
Moreover, different operating bandwidths may be supported and configured. The operating bandwidth is divided according to predefined criteria. In 11ax, an indication of resource configuration (Resource Allocation, RA) is required to support OFDMA and/or MU-MIMO. The resource configuration is transmitted in a common portion of the HE-SIG-B field. The ru_configuration flag (ru_ allocation signaling) in the common field of the resource unit (HE-SIG-B signal) is defined as 8 bits per 20Mhz PPDU bandwidth. The resource unit configuration indicator defines a number of resource unit arrangements and MU-MIMO configurations in the frequency domain. How to use these 8 bit resource unit configuration fields efficiently remains a challenge.
Disclosure of Invention
The embodiment of the invention provides a method and a device for structuring resource allocation marks. In one novel aspect, the structured resource configuration identifies an 8-bit resource unit configuration in the HE-SIG-B common field for each 20 MHz. The structured resource allocation indicator supports more than 4 MU-MIMO users. The structured resource unit configuration rules support resource unit configuration designations for 20Mhz,40Mhz,80Mhz, and 160Mhz operating bandwidths.
The embodiment of the invention provides a method for determining a resource unit, which comprises the following steps: the station decodes an 8-bit resource unit configuration signal in the HE-SIG-B common field, wherein the 8-bit resource unit configuration signal conforms to a structured resource unit configuration rule; and determining a resource unit for the station according to the decoded 8-bit resource unit configuration signal and the position of the user-specific field for the station; wherein the structured resource unit configuration rule supports a maximum of 8 users on resource units greater than or equal to 106-tones. The station is positioned in an orthogonal frequency division multiple access wireless network, and the HE-SIG-B public field has a fixed format; wherein resource allocation information is indicated in the HE-SIG-B common field and the user-specific field.
Optionally, 2 bits of the 8-bit resource unit configuration signal are used as a first category indicator to determine a first category of resource unit configuration. Wherein the first category comprises: a first size class indicating that there are large resource units greater than or equal to 242-tone resource units, at least one of a second size class indicating that there are 2 106-tone resource units, and a third size class indicating that the resource units present are resource units less than 242-tone and include at most one 106-tone resource unit. Wherein when the first class is a first size class, the 8-bit resource unit configuration signal comprises: 2 bits for indicating the size of the resource unit present, and 3 bits for indicating the number of stations scheduled on the resource unit. When the first class is the second size class, a first set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a first 106-tone resource unit and a second set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a second 106-tone resource unit.
Optionally, when the first class is the third size class, wherein a second class indicator having 3 bits in the 8-bit resource unit configuration signal indicates a configuration manner of non-large resource units of the third size class, the configuration manner includes: one 106-tone resource unit on a first portion of a channel, one 106-tone resource unit on a second portion of the channel and the channel having only small resource units that are less than 106-tones, wherein the second type indicator includes the 2 bits as the first type indicator. Optionally, a second bit in the second class indicator indicates whether there is a 106-tone resource unit on the first portion of the 20MHz channel and a third bit in the second class indicator indicates whether there is a 106-tone resource unit on the second portion of the 20MHz channel. Wherein if one of the second bit and the third bit indicates the presence of a 106-tone resource unit, the 8-bit resource unit configuration signal further comprises: 3 bit indicators and 2 bit indicators, wherein the 3 bit indicators represent the number of stations on the 106-tone resource unit; wherein the 2 bit indicator represents one of 4 resource unit configurations on a portion of the 20MHz channel where no 106-tone resource units are present, the 4 resource unit configurations comprising: representing a first configuration of 4 26-tone resource units, representing a second configuration of 1 52-tone resource unit and 2 26-tone resource units, representing a third configuration of 2 26-tone resource units and 1 52-tone resource unit, representing a fourth configuration of 2 52-tone resource units. Wherein, optionally, the frequency of the 52-tone resource units in the second configuration is less than the frequency of the 2 26-tone resource units; the frequency of the 2 26-tone resource units in the third configuration is less than the frequency of the 1 52-tone resource unit.
Wherein determining the resource unit for the station according to the decoded 8-bit resource unit configuration signal and the location of the user-specific field for the station comprises: determining a resource unit for the site based on a lookup table for resource unit configuration and a location of a user specific field for the site, wherein the lookup table is generated based on the structured resource unit configuration rule, wherein the lookup table is maintained in the site.
An embodiment of the present invention provides a method for transmitting information related to a resource unit, including: a network entity in an orthogonal frequency division multiple access wireless network allocates resource units for one or more stations; encoding 8-bit resource unit configuration signals into an HE-SIG-B common field for each 20MHz resource block according to a structured resource unit configuration rule, wherein the structured resource unit configuration rule supports at most 8 users on resource units greater than or equal to 106-tones; wherein the 8-bit resource unit configuration signal and user-specific field in the HE-SIG-B common field indicate information of resource units allocated by the network entity; and transmitting the HE-SIG-B common field and the user-specific field to one or more stations.
Wherein 2 bits of the 8-bit resource unit configuration signal are encoded for indicating a first class of resource unit configurations. The first bit in the 8-bit resource unit configuration signal is set to 1 if there are resource units of a size greater than 106-tones or 2 106-tone resource units, otherwise the first bit is set to 0. When there is a resource unit of a size greater than 106-tones, the second bit in the 8-bit resource unit configuration signal is set to 1, and the 8-bit resource unit configuration signal further comprises: 3 bits encoded to indicate the number of stations, 2 bits encoded to indicate the resource unit size. When there are 2 resource units of 106-tones, the second bit in the 8-bit resource unit configuration signal is set to 0, wherein the 8-bit resource unit configuration signal further comprises: a first set of bits representing a number of stations on a first 106-tone resource unit, the first set of bits having 3 bits; a second set of bits representing the number of stations on a second 106-tone resource unit, the second set of bits having 3 bits. Wherein the first bit and the second bit are different bits.
Optionally, the first bit is set to 0 and the second bit in the 8-bit resource unit configuration signal indicates whether a first half of the 20MHz channel is present for 106-tone resource units and the third bit in the 8-bit resource unit configuration signal indicates whether a second half of the 20MHz channel is present for 106-tone resource units. Wherein the first bit, the second bit and the third bit are different bits. If one of the second bit and the third bit indicates the presence of a 106-tone resource unit, the 8-bit resource unit configuration signal further includes: a 3 bit indicator representing the number of stations on a 106-tone resource unit, and a 2 bit indicator representing the presence of one of 4 resource unit configurations on a portion of a 20MHz channel without 106-tone resource units, the 4 resource unit configurations comprising: representing a first configuration of 4 26-tone resource units, representing a second configuration of 1 52-tone resource unit and 2 26-tone resource units, representing a third configuration of 2 26-tone resource units and 1 52-tone resource unit, representing a fourth configuration of 2 52-tone resource units.
Optionally, a network entity in the ofdma wireless network stores a lookup table for resource unit configuration, where the lookup table is generated according to the structured resource unit configuration rule, and the network entity in the ofdma wireless network encodes an 8-bit resource unit configuration signal into the HE-SIG-B common field for each 20MHz resource block according to the lookup table.
An embodiment of the present invention provides a station, comprising: a radio frequency transceiver for transmitting and receiving wireless signals in an orthogonal frequency division multiple access wireless network; a resource configuration decoder for decoding an 8-bit resource unit configuration signal in the HE-SIG-B common field in the received wireless signal according to the structured resource unit configuration rule; wherein the structured resource unit configuration rule supports a maximum of 8 users on resource units greater than or equal to 106-tones; and the resource unit management circuit is used for determining the resource unit for the station according to the decoded 8-bit resource unit configuration signal and the position of the user specific field for the station.
The embodiment of the invention provides an 8-bit resource unit configuration signal, which is obtained according to a structured resource unit configuration rule, wherein the structured resource unit configuration rule supports 8 users at most on a resource unit with 106-tone or more, so that the 8-bit resource unit configuration signal can support more than 4 MU-MIMO users.
Drawings
Further details, aspects and embodiments of the invention will be described by way of example only with reference to the accompanying drawings. Elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For ease of understanding, the same reference numerals are included in the various figures.
FIG. 1 is a schematic diagram of an exemplary wireless communication network 100 having 802.11ax enabled stations provided in accordance with an embodiment of the present invention;
Fig. 2 is a simplified block diagram of wireless station 101 and base station 102;
FIG. 3 is a schematic diagram of resource unit partitioning in an 802.11ax system according to an embodiment of the present invention;
FIG. 4 illustrates an exemplary schematic diagram of a structured 8-bit resource unit configuration provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of classifying 8-bit resource unit configuration flags with the first 2 bits according to an embodiment of the present invention;
fig. 6 illustrates an exemplary flow chart of a UE/transceiver decoding an 8-bit resource unit configuration indicator provided by an embodiment of the present invention;
Fig. 7 is a flowchart illustrating an exemplary procedure for a transmitter to encode an 8-bit resource unit configuration flag according to an embodiment of the present invention;
FIG. 8 illustrates an exemplary LUT provided by an embodiment of the invention, the LUT being built based on structured signal rules;
fig. 9 is an exemplary flowchart of a STA performing structured resource allocation indication according to an embodiment of the present invention;
fig. 10 is an exemplary flowchart of a network entity performing structured resource allocation labeling according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.
Fig. 1 illustrates an exemplary wireless communication network 100 having 802.11ax capable Stations (STAs) provided in accordance with an embodiment of the present invention. The wireless communication system 100 includes one or more wireless communication networks, and each wireless communication network has a fixed infrastructure element, such as wireless communication base stations 105 and 106. A base station may also be called an access point (access point), an access terminal, or a station operating in a software access point mode. Each of the wireless communication base stations 105 and 106 serves a geographic area. The geographical areas served by the wireless communication base stations 105 and 106 overlap.
Wireless mobile stations or Stations (STAs) 101 and 102 in wireless network 100 are served by base station 105. The STAs 101,102 and base station 105 support 802.11ax. Other wireless communication devices, such as wireless communication devices 103,107, and 108, are served by different base stations 106. Base station 106 may support different wireless standards (such as LTE) or may also support 802.11ax. The STAs 101 and 102 transmit uplink data to the base station 105 via uplink channels in the time and/or frequency domains. STAs 101 and 102 receive downlink data from the base station 105 via a downlink channel.
In one embodiment, the communication system uses Orthogonal Frequency Division Multiple Access (OFDMA). The wireless network 100 also supports MU-MIMO. The radio resources are divided into resource blocks for a plurality of users.
Fig. 2 further illustrates a simplified block diagram of a wireless station 101 and a base station 102 provided by the present invention.
The base station 105 has an antenna 126 that transmits and receives radio signals. An RF transceiver 123 coupled to the antenna receives RF signals from the antenna 126, converts the received RF signals to baseband signals, and sends them to the processor 122. Note that the antenna herein may refer to a single antenna or a group of antennas (i.e., multiple antennas). The RF transceiver 123 also converts the baseband signal received from the processor 122, converts the baseband signal into an RF signal, and transmits to the antenna 126. The processor 122 processes the received baseband signals and invokes different functional modules to perform functions in the base station 105. Memory 121 stores program instructions and data 124 for controlling the operation of base station 105. The base station 105 also includes a set of control modules, such as a HE-SIG-B processor 125, that perform functional tasks for the HE-SIG-B function and transmit the HE-SIG-B field to the STAs 101.
The STA 101 has an antenna 135 that transmits and receives radio signals. Note that an antenna herein may refer to a single antenna or a group of antennas, i.e., a plurality of antennas. An RF transceiver 134 coupled to the antenna receives RF signals from the antenna 135, converts the received RF signals to baseband signals, and sends them to the processor 132. The RF transceiver 134 also converts the baseband signal received from the processor 132 into an RF signal and transmits to the antenna 135. Processor 132 processes the received baseband signals and invokes various functional modules to perform functions in station 101 (e.g., a mobile station). Memory 131 stores program instructions and data 136 to control the operation of station 101, such as a mobile station. Site 101 also includes a set of control modules that perform functional tasks. The resource configuration (RA) decoder 192 decodes the 8-bit resource unit configuration signal in the HE-SIG-B common field following a structured resource unit configuration rule that supports more than 4 users over a larger resource unit of 106 tones using the 8-bit structured resource unit configuration signal. The resource unit management circuitry 193 determines a Resource Unit (RU) for a station from the decoded 8-bit resource unit configuration signal and a location of a user-specific field for the station, wherein Resource Allocation (RA) information for the station 101 is indicated in the HE-SIG-B common field and the user-specific field, and the HE-SIG-B common field has a fixed format.
Fig. 3 shows an exemplary schematic diagram of 20MHz resource unit division in an 802.11ax system provided by an embodiment of the present invention. In one embodiment, the resource configuration is based on the configured/defined operating bandwidth, as shown. The 20MHz block diagram 201 shows the resource unit configuration of 20MHz bandwidth. The 20MHz can be divided into 9 26-tone resource units, 4 52-tone resource units, 2 106-tone resource units and 26-tone midrange units, and one 242-tone unit. As shown in fig. 3, 1,2,3,4,5,6,7,8,9 are 26-tone resource units; 10,11,12,13 are 52-tone resource units; 14,15 are 106-tone resource units; 16 is a 204-tone resource unit; in one embodiment, a structured label allocates an 8-bit field for each 20MHz resource configuration. At the 20MHz block, 106-tones and 242-tones support MU-MIMO. Therefore, for each of the configured 106-tones and 242-tones, the number of users included on the configured 106-tone and 242-tone resource units is required in the 8 bits. Using a conventional 8-bit configuration design has a problem that only 2 bits are left to indicate the number of MU-MIMO users, thus supporting a maximum of 4 users, which limitation does not meet the demand. In one example, the first two bits in the 8-bit resource unit configuration field are used to define different categories of resource unit configurations, and 3 bit configurations are provided in the 8-bit resource unit configuration field to indicate the number of MU-MIMO users, up to 8 users may be provided.
Fig. 4 shows an exemplary diagram of a structured 8-bit resource unit configuration provided by an embodiment of the present invention. In one novel aspect, structured labeling is used. The 8 bits are designed according to predefined rules and the network encodes correspondingly while the UE decodes correspondingly. It reduces the complexity of the lookup table, saves memory space, and improves efficiency. In one example, BIT 1 (BIT-1) is designed to distinguish between a large Resource Unit (RU) and a small resource unit. In step 301, if BIT 1 (BIT-1) is set to 1, it indicates that there are 242-tones and a larger resource unit than 242-tones, or that there are two 106-tones. In step 302, if BIT 1 (BIT-1) is set to 0, it indicates that there is no large resource unit. For the case where there is a large resource unit, BIT 2 (e.g., BIT-2) is set to 1 in step 311 to indicate that there is a resource unit greater than or equal to 242-tones. In another case where there is a large resource unit, BIT 2 (e.g., BIT-2) is set to 0, indicating that two 106-tones are configured, at step 312. Once the first two bits are decoded indicating a large resource unit class, the decoding format of the two branches is determined. In step 331, in the case where the first two bits are "11", the 8-bit resource unit is denoted with the format "11, yyy, aa, b". In step 332, in the case where the first two bits are "10", the 8-bit resource unit indicator has the format "10, yyy, aa, b". In both cases yyy is a 3 bit field indicating the number of users. "aa" is a 2-bit field indicating the type of large resource unit. In one embodiment, a predefined rule is followed to encode "aa", wherein the predefined rule is 242-RU (00), 484-RU (10), 996-RU (01), or 2x 996-RU (11), e.g., aa=00, indicating that the large resource unit is a 242-tone resource unit; aa=10, indicating that the large resource unit is a 484-tone resource unit; aa=01, indicating that the large resource unit is a 996-tone resource unit; aa=11, indicating that the large resource unit is a 2x 996-tone resource unit. Or in step 332, in the case where the first two bits are "10", the 8-bit resource unit is denoted with the format "10, yyy", wherein the first 3 bits yyy indicate the number of MU-MIMO stations on the first 106 tone resource unit and the last 3 bits yyy indicate the number of MU-MIMO stations on the second 106 tone resource unit.
By looking at BIT 2 and BIT 3, the branches for small size resource units, i.e. BIT 1 (BIT-1) equals 0, are decoded. In step 313, BIT 2 (BIT-2) is set to "1" indicating that the first portion of the channel has resource elements of 106-tones.
In step 314, BIT 3 (BIT-3) is set to "1" indicating that the second portion of the channel has resource elements of 106-tones. Thus, in step 333 following step 313, the 8-bit resource unit designation format is determined to be "010, yyy, cc". In step 334 following step 314, the 8-bit resource unit designation format is determined to be "001, yyy, cc". "yyy" in step 333 indicates the number of users in the 106-tone resource unit of the first portion, and "cc" in step 333 indicates the type of resource unit less than 106-tone in the second portion; "yyy" in step 334 indicates the number of users in the 106-tone resource unit of the second portion, and "cc" in step 334 indicates the type of resource unit less than 106-tone in the first portion. In one example, "cc" is defined as follows: "11" two 52-tone resource units; "10": 52 26 26} tone resource units; "01" {26 26 52} tone resource unit; "00" of 4 26-tone resource units. Specifically, if BIT 2 (BIT-2) is set to "1" indicating that the first portion of the channel has resource units of 106-tones, BIT 3 (BIT-3) is set to "0" indicating that the second portion of the channel has resource units of less than 106-tones, "yyy" of step 333 indicates the number of users in the 106-tone resource units of the first portion of the channel, and "cc" of step 333 indicates the type of resource units of less than 106-tones that the second portion of the channel has;
If BIT 3 (BIT-3) is set to "1" indicating that the second portion of the channel has resource units of 106-tones, BIT 2 (BIT-2) is set to "0" indicating that the first portion of the channel has resource units of less than 106-tones, and "yyy" of step 334 indicates the number of users in the 106-tone resource units of the second portion of the channel; the "cc" of step 334 indicates the type of resource units having less than 106-tones in the first portion of the channel.
If BIT 2 (BIT-2) and BIT 3 (BIT-3) are both 0, then the format is defined in steps 335 and 336 as: "000, cccc,0". "cccc" indicates whether the two pairs are 52-tone or 26-tone. For example, in step 335, the format is "000,1111,0" for all 52-tone resource units. Similarly, the format is "000,0000,0" for all 26-tone resource units. In one novel aspect, a 3-bit field is used to support the number of MU-MIMO users exceeding 4 users. "011xxxxx", "000xxxx1" and "11xxxx 1" are reserved indices.
Table 1 (below) shows an example table of an 8-bit format using structured resource allocation designations provided by an embodiment of the present invention. The first column represents the first 2 or 3 bits of the 8-bit flag. The second column is a format of remaining bits, 6 bits remaining for the first 2 bits, or5 bits remaining for the first 3 bits. The third column describes the configuration type. There are 8 configuration types, "000,0cccc", "000,1rrrr", "001, cc, yyy", "010, cc, yyy", "011, rrrrr", "10, yyy", "11,0aa, yyy", and "111, rrrrrrr". The 3-bit "yyy" field indicates the number of STAs following the format. "cc" is a type field used by the network and the UE. "aa" is a type field for tones greater than 242. In one embodiment, the first 2 bits and the first 3 bits are used to indicate the type of format. The remaining bits are encoded accordingly. The tables and definitions shown herein are preferred configurations.
TABLE 1
Fig. 5 illustrates a classification of 8-bit resource unit configurations using the first 2 bits provided by an embodiment of the present invention. In one novel aspect, 2 bits are used to categorize an 8-bit resource unit configuration indicator field that enables the indicator to support up to 8 users for MU-MIMO rather than 4 users. If the first 2 bits are "11", the category of the resource unit configuration field is determined to be used to indicate the large resource unit 510, i.e., if the first 2 bits are "11", the channel exists for the large resource unit 510. If the first 2 bits are "10", the category of the resource unit configuration field is determined to be used to indicate 2 106-tones 520, i.e., if the first 2 bits are "10", there are 2 106-tones 520 of the channel. If the first 2 bits are "0x", including "01" and "00", the category of the resource unit configuration field is determined to be used to indicate the non-large resource unit 530, i.e., if the first 2 bits are "0x" the channel exists for the non-large resource unit 530. Following these 3 class specifications, an 8-bit resource unit configuration field is defined accordingly. In one example, the categories 530 are further divided to obtain a second set of categories. A second category indicator of 3 bits is used. The second category indicator includes two bits and an additional bit for the first category. Category 591 is denoted "010" indicating that the 106-tone resource element is in the first half of the channel. Category 592 is denoted as "001" indicating that the 106-tone resource unit is in the second half of the channel. Category 593 is denoted "000" and represents only small resource elements, 52-tone resource elements and 26-tone resource elements. Bit "111" represents a reserved bit.
For class 510, a3 bit field 511 indicating the number of stations, a2 bit field 512 indicating the type of resource unit, and a reserved bit 513 are included. For category 520, a 3-bit field is included that indicates the number of stations on the 106-tone of the first portion and a 3-bit field is included that indicates the number of stations on the 106-tone of the second portion.
For category 530, the "010" configuration remaining field includes a 3-bit field 531 representing the number of stations on the 106-tone of the first portion, and a 2-bit field 532 representing 26-tone and/or 52-tone types. The "001" configuration of the remaining fields to include a 2 bit type field 541,2 bit type field 541 indicating whether it is 106-tones or true small resource units (items) may indicate the type of small resource units, such as 2 26 tones and 1 52 tones, 4 26 tones, etc., and a 3 bit field 542 indicating the number of stations on the 106-tones of the second portion. The "000" configures 4 bit fields 551, the 4 bit fields 551 indicating whether the resource unit is of 26-tone type or 52-tone type. Reference numeral 552 indicates that the corresponding bit is 0; "111" indicates that the last 5 bits 561 are reserved.
Fig. 6 is an exemplary flow chart of a UE/receiver decoding an 8-bit resource unit configuration indicator provided by an embodiment of the present invention. In one example, the receiver of the 8-bit resource unit configuration index decodes the meaning of the 8-bit resource unit configuration index according to predefined rules without using a LUT to determine the resource configuration. The receiver, typically at the UE side, detects each bit according to predefined rules and determines the latter meaning from the setting of the preceding bit. The receiver starts at bit 1 (denoted b 1) and moves forward. In one novel aspect, the first 2 bits (b 1b 2) of the 8-bit resource unit configuration indicator are grouped to classify the resource unit configuration signals.
In step 601, the receiver detects whether b1b2 is equal to "11". If step 601 determines yes, the receiver performs step 611 and determines that b3b4b5 represents the number of stations, b6b7 represents the type of resource unit size, and b8 is reserved. If step 601 is determined to be negative, the receiver performs step 602. In step 602, the receiver determines whether b1b2 is equal to "10". If step 602 determines yes, the receiver performs step 612 and determines b3b4b5 as the number of stations on the first portion of the channel and b6b7b8 as the number of stations on the second portion of the channel. If the result of the determination in step 602 is negative, the receiver performs step 603.
In step 603, the receiver determines whether b1 is equal to 0. If the result of the determination of step 603 is negative, the receiver performs step 641 and takes the remaining bits as reserved bits. If step 603 determines yes, the receiver performs step 621. In step 621, the receiver determines whether b2b3 is equal to "10". If step 621 determines that b2b3 is equal to "10", the receiver performs step 631 and determines that b4b5b6 represents the number of stations on the 106-tone and determines that b7b8 represents the resource element pattern of the second portion of the channel. In one example, b7b8 is defined as follows: "11" two 52-tone resource units; "10": 52,2626} tone resource units; "01" {26 26 52} tone resource unit; "00" of 426 tone resource units. If the determination at step 621 is negative, the receiver performs step 622.
In step 622, the receiver determines whether b2b3 is equal to "01". If step 622 determines that it is, the receiver performs step 632 and determines that b4b5 represents a resource element pattern (which may also be referred to as a channel pattern CHANNEL PATTERN) for the first portion of the channel and determines that b6b7b8 indicates the number of stations on the 106-tone. In one embodiment, b4b5 is defined as follows: "11" two 52-tone resource units; "10": 52 26 26} tone resource units; "01" {26 26 52} tone resource unit; "00" of 4 26-tone resource units. If the result of the determination at step 622 is negative, the receiver performs step 623.
In step 623, the receiver determines whether b2b3 is equal to "00". If step 623 determines yes, the receiver performs step 633 and determines that b4b5 indicates a resource unit pattern on a first portion of the channel and that b6b7 indicates a resource unit pattern on a second portion of the channel. In one example, b4b5 and b6b7 are defined as follows: "11" two 52-tone resource units; "10" {52,26 } tone resource units; "01" {26 26 52} tone resource unit; "00" of 4 26-tone resource units. If the determination at step 623 is negative, the receiver performs step 641 and takes the remaining bits as reserved bits.
Fig. 7 is a flowchart illustrating the behavior of a transmitter for encoding an 8-bit resource unit configuration flag according to an embodiment of the present invention. In one embodiment, a transmitter (e.g., an eNB or network entity) encodes an 8-bit resource unit configuration indication field based on the size of the resource unit according to predefined rules. In step 701, the transmitter determines whether there are 242-tone resource units greater than or equal to. If step 701 determines that it is true, the transmitter performs step 711 and sets b1=1, b2=1, b3b4b5 indicates that the number of stations on the 242-tone resource unit is greater than or equal to, b6b7 indicates that the size type of the 242-tone resource unit is greater than or equal to, and b8=0. In one example, b6b7 is defined as follows: 242-RU (00), 484-RU (10), 996-RU (01), or 2 x 996-RU (11). If the determination of step 701 is negative, the transmitter performs step 702.
At step 702, the transmitter determines whether there are 2 106-tones. If step 702 determines yes, the transmitter performs step 712 and sets b1=1, b2=0, b3b4b5 indicates the number of stations for 106-tones in the first portion, and b6b7b8 indicates the number of stations for 106-tones in the second portion. If the result of the determination of step 702 is negative, the transmitter performs step 703 and sets b1=0. After setting b1=0 in step 703, the transmitter performs step 721.
In step 721, the transmitter determines whether 106-tones are present in the first portion. If step 721 determines that it is, the transmitter performs step 731 and sets b2b3= "10", sets b4b5b6 to indicate the number of stations for 106-tones, sets b7b8 to indicate the resource unit pattern of the second part of the channel, e.g., b7b8 is the pattern index of the second part of the channel. In one example, b7b8 is defined as follows: "11" of 2 52-tone resource units; "10": 52 26 26} tone resource units; "01" {26 26 52} tone resource unit; "00" of 4 26 tone resource units. If step 721 determines no, the transmitter performs step 722. In step 722, the transmitter determines whether 106-tones are present in the second portion.
If the determination at step 722 is yes, the transmitter performs step 732 and sets b2b3= "01", sets b4b5 to indicate the resource unit pattern on the first part of the channel, e.g. to indicate the pattern index on the first part of the channel, and sets b6b7b8 to indicate the number of stations of 106-tones. In one example, b4b5 is defined as follows: "11":2 52-tone resource units; "10": 52 26 26} tone resource units; "01" {26 26 52} tone resource unit; "00" of 4 26-tone resource units. If the result of the determination of step 722 is negative, the transmitter determines that there is no resource unit greater than 106-tone in step 741, and performs step 733. In step 733, the transmitter sets b2b3= "00" and sets b4b5 to indicate the resource unit pattern on the first part of the channel, e.g. the pattern index of the first part of the channel, and sets b6b7 to indicate the resource unit pattern on the second part of the channel, e.g. the pattern index of the second part of the channel. In one example, b4b5 and b6b7 are defined as follows: "11":2 52-tone resource units; "10": {52 26 26} tone resource units; "01": {26 26 52} tone resource units; "00":4 26-tone resource units.
It will be appreciated by those skilled in the art that the labels of, for example, bit-1, b1b2, b4b5b6 are relative positions of the 8-bit fields. Other common identifiers, such as an identifier of an 8-bit field representing b7b6b5b4b3b2b1b0, can be substituted for the identifiers in the previous figures. Also, in other embodiments, bit-1 may be encoded at the position of b7 in b7b6b5b4b3b2b1b 0. Similarly, b8 or bit-8 may be encoded at the position b0 in b7b6b5b4b3b2b1b 0.
In one novel aspect, a resource unit RU configuration lookup table is established according to the above-described structural rules. The look-up table LUT can be built up according to rules, stored statically or generated dynamically. The UE can determine the resource configuration based on the structured signal rules or by searching the LUT established based on the rules. In the alternative, the UE can use a combination of LUT and structured signal rules to obtain RU configuration information.
Fig. 8 shows an example of an LUT established according to structural signal rules provided by an embodiment of the present invention. The first column shows an 8-bit layout. The bit order is b7b6b5b4b3b2b1b0. The next 9 columns show the corresponding Resource Units (RUs) in the corresponding positions. The last column shows the number of users supported for each 8-bit pattern. MU-MIMO supports Resource Units (RUs) with sizes greater than or equal to 106-tones. 0001rrrr, 01drrr, and 111rrr are reserved and used to carry other information. And classifying the LUT according to the structured marking rule. Row 801 includes configurations that only support OFDMA. Row 802 supports OFDMA and MU-MIMO, with one resource unit RU supporting MU-MIMO. Row 803 supports OFDMA and MU-MIMO, where an RU with 2 resource units supports MU-MIMO. Row 804 is a large RU. In an alternative embodiment, the LUT is established according to a structured resource unit configuration rule, the LUT is stored in the network entity and the site, the network entity encodes and transmits an 8-bit resource unit configuration signal using the LUT, and the site decodes the 8-bit resource unit configuration signal according to the LUT after receiving the 8-bit resource unit configuration signal.
Fig. 9 shows an exemplary flow of STA decoding structured resource allocation indication provided by an embodiment of the present invention. In step 901, the sta receives at least one wireless signal;
In step 902, the sta decodes an 8-bit resource unit configuration signal in a HE-SIG-B common field in a wireless signal according to a structured Resource Unit (RU) configuration rule, wherein the structured resource unit configuration rule supports a maximum of 8 users on resource units greater than or equal to 106-tones.
In step 903, a Resource Unit (RU) for the STA is determined according to the decoded 8-bit resource unit configuration signal and a location of a user-specific field for the STA among a plurality of user-specific fields corresponding to the 8-bit resource unit configuration signal in the wireless signal. The 8-bit resource unit configuration signal and the plurality of user specific fields may be transmitted in one radio signal (e.g., one packet) or may be transmitted in two separate radio signals (e.g., 2 packets).
The wireless signal includes an 8-bit resource unit configuration signal and a plurality of user-specific fields, each of which has a user ID indicating which STA the user-specific field corresponds to. Wherein the order of the user specific fields in the radio signal corresponds to the order of the indicated resource units in the 8-bit resource unit configuration signal.
For example, the 8-bit resource unit configuration signal b1b2b3b4b5b6b7b8 is 10010001, i.e., the STA can determine from the first 2 bits 10 that the channel includes 2 106 tone resource units and 26 tone resource units located between the 2 106 tone resource units, b4b5b6 being the number of STAs on the first 106 tone resource unit, in this example assumed to be 2, b6b7b8 being the number of STAs on the second 106 tone resource unit, in this example assumed to be 1. The 8-bit resource unit configuration signal 10010001 indicates that the operation bandwidth of the channel includes 2 106 tone resource units and 26 tone resource units located between the 2 106 tone resource units, the STA number of the first 106 tone resource units being 2 and the STA number of the second 106 tone resource units being 1. At this time, the wireless signal carries 4 user-specific fields. If the user specific field containing the user ID of the STA is either 1 st or 2 nd, the STA is allocated to the first 106 tone resource unit; if the user specific field containing the user ID of the STA is 3 rd, the STA is allocated to a 26 tone resource unit located between the first 106 tone resource unit and the second 106 tone resource unit; if the user specific field containing the user ID of the STA is the 4 th, the STA is allocated to the second 106 tone resource unit.
Fig. 10 is an exemplary flowchart of a network entity performing structured resource allocation labeling according to an embodiment of the present invention. In step 1001, a network entity configures resource element allocation for one or more STAs in an OFDMA wireless network, wherein information of the resource allocation is indicated in a HE-SIG-B common field and a user-specific field, the HE-SIG-B common field for the resource element information having a fixed format. In step 1002, the network entity encodes an 8-bit resource unit configuration signal in the HE-SIG-B common field for each 20MHz resource block according to a structured resource unit configuration rule, wherein the structured resource unit configuration rule supports a maximum of 8 users on resource units greater than or equal to 106-tones. In step 1003, the network entity sends an 8-bit resource unit configuration signal to one or more STAs.
Although the invention has been described in connection with certain specific embodiments, the invention is not limited thereto. For example, although the present invention is described by taking an LTE-advanced (LTE-advanced) mobile communication system as an example, the present invention can be similarly applied to other mobile communication systems such as a time division synchronous code division multiple access (Time Division Synchronous Code Division Multiple Access, TD-SCDMA) system. Accordingly, it is intended that the appended claims be interpreted as covering and including all alterations and modifications as fall within the true spirit and scope of the invention.
Claims (19)
1. A method for determining resource units, characterized in that,
The station decodes an 8-bit resource unit configuration signal in the HE-SIG-B common field, wherein the 8-bit resource unit configuration signal conforms to a structured resource unit configuration rule; and
Determining a resource unit for the station according to the decoded 8-bit resource unit configuration signal and the position of a user specific field for the station;
Wherein 2 bits of the 8-bit resource unit configuration signal are used as a first class indicator to determine a specific size class in a first class of resource unit configurations, and when the specific size class in the first class is a third size class, a second class indicator of 3 bits in the 8-bit resource unit configuration signal is used to indicate a class in a second group of classes into which the third size class is divided, wherein the second group of classes includes one 106-tone resource unit on a first half of a channel and one 106-tone resource unit on a second half of the channel, wherein the second class indicator includes the 2 bits as the first class indicator.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
Wherein the first category comprises: a first size class indicating that there are large resource units greater than or equal to 242-tone resource units, a second size class indicating that there are 2 106-tone resource units, and the third size class, wherein the third size class indicates that the resource units present are resource units less than 242-tone and include at most one 106-tone resource unit.
3. The method of claim 2, wherein when the specific size class in the first class is a first size class, the 8-bit resource unit configuration signal comprises: 2 bits for indicating the size of the resource unit present, and 3 bits for indicating the number of stations scheduled on the resource unit.
4. The method of claim 1, wherein a first set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a first 106-tone resource unit and a second set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a second 106-tone resource unit when the particular size class in the first class is a second size class.
5. A method according to claim 1 or 3, wherein the second set of categories further comprises: the channel does not have 106-tone resource units and has small resource units that are smaller than 106-tones.
6. The method of claim 5, wherein a second bit in the second class indicator indicates whether there is a 106-tone resource unit on a first half of a 20MHz channel and a third bit in the second class indicator indicates whether there is a 106-tone resource unit on a second half of the 20MHz channel.
7. The method of claim 6, wherein if one of the second bit and the third bit indicates the presence of a 106-tone resource unit, the 8-bit resource unit configuration signal further comprises: 3 bit indicators and 2 bit indicators, wherein the 3 bit indicators represent the number of stations on the 106-tone resource unit; wherein the 2 bit indicator represents one of 4 resource unit configurations on a half portion of the 20MHz channel where no 106-tone resource units are present, the 4 resource unit configurations comprising: representing a first configuration of 4 26-tone resource units, representing a second configuration of 1 52-tone resource unit and 2 26-tone resource units, representing a third configuration of 2 26-tone resource units and 1 52-tone resource unit, representing a fourth configuration of 2 52-tone resource units.
8. The method of claim 1, wherein the step of determining the position of the substrate comprises,
Determining the resource unit for the station based on the decoded 8-bit resource unit configuration signal and the location of the user-specific field for the station comprises:
A resource unit for the station is determined based on a lookup table for resource unit configuration and a location of a user specific field for the station, wherein the lookup table is generated based on the structured resource unit configuration rule.
9. A method for transmitting information related to a resource unit, comprising:
a network entity in an orthogonal frequency division multiple access wireless network allocates resource units for one or more stations;
Encoding an 8-bit resource unit configuration signal into the HE-SIG-B common field for a 20MHz resource block, wherein the 8-bit resource unit configuration signal follows a structured resource unit configuration rule; wherein the 8-bit resource unit configuration signal and user-specific field in the HE-SIG-B common field indicate information of resource units allocated by the network entity; and
Transmitting the HE-SIG-B common field and the user-specific field to one or more stations;
Wherein 2 bits of the 8-bit resource unit configuration signal are used as a first class indicator to determine a specific size class in a first class of resource unit configurations, and when the specific size class in the first class is a third size class, a second class indicator of 3 bits in the 8-bit resource unit configuration signal is used to indicate a class in a second group of classes into which the third size class is divided, wherein the second group of classes includes one 106-tone resource unit on a first half of a channel and one 106-tone resource unit on a second half of the channel, wherein the second class indicator includes the 2 bits as the first class indicator.
10. The method of claim 9, wherein a first bit in the 8-bit resource unit configuration signal is set to 1 if there are resource units of a size greater than 106-tones or 2 106-tone resource units, and wherein the first bit is set to 0 otherwise.
11. The method of claim 10, wherein a second bit in the 8-bit resource unit configuration signal is set to 1 when there is a resource unit of size greater than 106-tones, and the 8-bit resource unit configuration signal further comprises: 3 bits encoded to indicate the number of stations, 2 bits encoded to indicate the resource unit size, the second bit being located in the 2 bits as the first class indicator.
12. The method of claim 11, wherein a second bit in the 8-bit resource unit configuration signal is set to 0 when there are 2 106-tone resource units, wherein the 8-bit resource unit configuration signal further comprises: a first set of bits representing a number of stations on a first 106-tone resource unit, the first set of bits having 3 bits; a second set of bits representing the number of stations on a second 106-tone resource unit, the second set of bits having 3 bits.
13. The method of claim 10, wherein the first bit is set to 0 and the second bit in the 8-bit resource unit configuration signal indicates whether a first half of a 20MHz channel has 106-tone resource units present and the third bit in the 8-bit resource unit configuration signal indicates whether a second half of the 20MHz channel has 106-tone resource units present.
14. The method of claim 13, wherein if one of the second bit and the third bit indicates the presence of a 106-tone resource unit, further comprising in the 8-bit resource unit configuration signal: a 3-bit indicator representing the number of stations on a 106-tone resource unit, and a 2-bit indicator representing the presence of one of 4 resource unit configurations on a half of a 20MHz channel without 106-tone resource units, the 4 resource unit configurations comprising: representing a first configuration of 4 26-tone resource units, representing a second configuration of 1 52-tone resource unit and 2 26-tone resource units, representing a third configuration of 2 26-tone resource units and 1 52-tone resource unit, representing a fourth configuration of 2 52-tone resource units.
15. The method as recited in claim 9, further comprising:
a network entity in an orthogonal frequency division multiple access wireless network maintains a look-up table for resource unit configuration, wherein the look-up table is generated according to the structured resource unit configuration rules.
16. The method of claim 15, wherein the step of determining the position of the probe is performed,
Encoding the 8-bit resource unit configuration signal into the HE-SIG-B common field for the 20MHz resource block includes:
according to the lookup table, an 8-bit resource unit configuration signal is encoded into the HE-SIG-B common field for each 20MHz resource block.
17. A station, comprising:
A radio frequency transceiver for transmitting and receiving wireless signals in an orthogonal frequency division multiple access wireless network; a resource configuration decoder for decoding an 8-bit resource unit configuration signal in the HE-SIG-B common field in the received wireless signal according to the structured resource unit configuration rule;
A resource unit management circuit for determining a resource unit for the station according to the decoded 8-bit resource unit configuration signal and a location of a user specific field for the station;
Wherein 2 bits of the 8-bit resource unit configuration signal are used as a first class indicator to determine a specific size class in a first class of resource unit configurations, and when the specific size class in the first class is a third size class, a second class indicator of 3 bits in the 8-bit resource unit configuration signal is used to indicate a class in a second group of classes into which the third size class is divided, wherein the second group of classes includes one 106-tone resource unit on a first half of a channel and one 106-tone resource unit on a second half of the channel, wherein the second class indicator includes the 2 bits as the first class indicator.
18. The station of claim 17, wherein the means for transmitting comprises a transmitter,
Wherein the first category comprises: a first size class indicating that there are large resource units greater than or equal to 242-tone resource units, a second size class indicating that there are 2 106-tone resource units, and the third size class indicating that the resource units present are resource units less than 242-tone and include at most one 106-tone resource unit.
19. The station of claim 18, wherein the station comprises a plurality of stations,
When the first class indicator indicates the first size class, the 8-bit resource unit configuration signal includes: 2 bits for indicating the size of the large resource unit, and 3 bits for indicating the number of stations scheduled on the large resource unit;
Or when the first class indicator indicates the second size class, a first set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a first 106-tone resource unit and a second set of 3 bits in the 8-bit resource unit configuration signal represents a number of stations on a second 106-tone resource unit;
Or alternatively
When the first class indicator indicates the third size class, the second group of classes includes: one 106-tone resource unit on the first half of the channel, one 106-tone resource unit on the second half of the channel and the channel has no 106-tone resource units and has small resource units less than 106-tones.
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| CN201710900545.1A CN107872307B (en) | 2015-09-28 | 2017-09-28 | Method for determining resource unit, method for transmitting resource unit related information and corresponding device |
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