TWI651981B - Wireless communicating method and associated electronic device - Google Patents

Abstract

A wireless communication method and an electronic device, the wireless communication method includes: performing a resource unit allocation on a channel, and assigning a first resource unit and a second resource unit to a site in the primary resource unit allocation process, where The first resource unit is different from the second resource unit. Data throughput can be improved by using the wireless communication method.

Description

Wireless communication method and related electronic device

The present application relates to the field of wireless communications, and in particular, to a wireless communication method and related electronic devices.

IEEE 802.11 is a specification for media access control (MAC) and physical layer (PHY) for implementing wireless local area network (WLAN) communication over Wi-Fi bands (2.4 GHz, 3.6 GHz, 5 GHz, and 60 GHz). This standard provides the basis for wireless network products to use the Wi-Fi band. For example, IEEE 802.11ac is a wireless network standard in the 802.11 family of standards that provides high throughput WLAN over the 5 GHz band. In the IEEE 802.11 ac standard, significantly wider channel bandwidths (20 MHz, 40 MHz, 80 MHz, and 160 MHz) are proposed. The High Efficiency WLAN Research Group (HEWSG) is a research group within the IEEE 802.11 working group that studies spectral efficiency improvements to improve system throughput for wireless devices in high-density scenarios. TGax is formed in response to HEW SG. Its mission is to work on the IEEE 802.11ax standard, which is the successor to the IEEE 802.11ac standard.

The IEEE 802.11ax standard seeks to increase throughput in dense deployment environments. In particular, uplink (UL) and downlink (DL) user aggregation has been introduced to improve network efficiency. Transmission over UL Orthogonal Frequency Division Multiple Access (OFDMA) for non-access point (AP) stations can mitigate collisions and can also enhance performance such as throughput and latency. For single-user (SU) OFDMA applications, the modulation and coding scheme used by the single-user (station) to communicate with access points (APs) in the channel is mainly caused by the worst signal-to-noise ratio in the frequency domain (signal to noise ratio). , SNR) determines, and this will greatly affect the quality of communication. Therefore, new solutions are needed to enable stations to communicate with APs using different MCSs.

It is an object of the present invention to provide a wireless communication method and associated electronic device to solve the above problems.

According to an embodiment of the present invention, a wireless communication method is disclosed, including: performing resource unit allocation once on a channel; in the primary resource unit allocation, allocating a first resource unit and a second resource unit to a station, where The first resource unit is different from the second resource unit.

According to an embodiment of the invention, a wireless communication method is disclosed, comprising: using a first stream in a resource unit and a first modulation and coding scheme for causing a station to communicate in a channel; and using a second one of the resource units And a second modulation and coding scheme for causing the station to communicate in the channel, wherein the second stream is different from the first stream, and the second modulation and coding scheme is different from the first A modulation and coding scheme is different.

According to an embodiment of the invention, an electronic device is disclosed, comprising: a storage device for storing a code; and a processor for executing the code; wherein when the code is loaded by the processor When executed, the code indicates that the processor performs the following steps: performing resource unit allocation once on a channel; in the primary resource unit allocation, allocating a first resource unit and a second resource unit to a station, where The first resource unit is different from the second resource unit.

According to an embodiment of the invention, an electronic device is disclosed, comprising: a storage device for storing a code; and a processor for executing the code; wherein when the code is loaded by the processor And executing, the code instructing the processor to perform the steps of: using a first stream in the resource unit and a first modulation and coding scheme for causing the station to communicate in the channel; and using the resource unit a second stream and a second modulation and coding scheme for causing the station to communicate in the channel, wherein the second stream is different from the first stream, and the second modulation and coding scheme is The first modulation and coding scheme is different.

The present invention can allocate different resources to a site by performing resource unit allocation on a channel. Source unit. Therefore, the data throughput can be improved by using the wireless communication method of the present invention.

SNR‧‧‧ signal to noise ratio

QAM‧‧‧Quadrature amplitude modulation

RU1-RU11‧‧‧Resource Unit 1-11

RUX‧‧‧Resource Unit

STA, STA’‧‧‧ site

BW‧‧‧ Bandwidth

FREQ1-4‧‧‧Frequency 1-4

MCS‧‧‧ modulation and coding scheme

500‧‧‧Electronic equipment

501‧‧‧ processor

502‧‧‧Storage equipment

1 is a schematic diagram of a wireless communication method performed on a channel CH1 according to a first embodiment of the present invention.

2 is a schematic diagram of a wireless communication method performed on a channel CH2 in accordance with a second embodiment of the present invention.

Figure 3 is a diagram showing a wireless communication method performed on a channel CH3 in accordance with a third embodiment of the present invention.

Fig. 4 is a diagram showing a wireless communication method performed on a channel CH4 according to a fourth embodiment of the present invention.

Figure 5 is a schematic diagram of an electronic device 500 for performing the above described wireless communication method in accordance with an embodiment of the present invention.

Certain terms are used throughout the description and subsequent patent applications to refer to particular elements. One of ordinary skill in the art will appreciate that electronic device manufacturers may refer to the same component by different nouns. The present specification and the following claims do not use the difference of the names as the means for distinguishing the elements, but the difference in function of the elements as the basis for the distinction. The term "comprising" as used throughout the specification and subsequent claims is an open term and should be interpreted as "including but not limited to". In addition, the term "coupled" is used herein to include any direct and indirect electrical connection. Thus, if the first device is described as being electrically connected to the second device, it is meant that the first device can be directly connected to the second device, or indirectly connected to the second device by other means or connection means.

1 is a schematic diagram of a wireless communication method performed on a channel CH1 according to a first embodiment of the present invention. Channel CH1 occupies a frequency band ranging from frequency FREQ1 to frequency FREQ2. For site and access The point AP (not shown in FIG. 1) communicates, and the frequency band is equally divided into four sub-bands corresponding to resource units RU1, RU2, RU3, and RU4, respectively, which have the same bandwidth BW. In another embodiment, the bandwidth BW of the sub-band corresponding to the resource units RU1, RU2, RU3, and RU4 may also be different. It should be noted that the frequency bandwidth determined by the frequencies FREQ1 and FREQ2 is not a limitation of the present invention. The number of RUs included in the frequency band shown in Fig. 1 is for explanation and explanation purposes only, and can be adjusted according to the bandwidth of the actual application. According to the previous communication between the AP and the station, the AP can know the status of the channel CH1, and the upper part of the first figure shows the status of the channel CH1. As shown in Fig. 1, the state of the channel CH1, such as the signal-to-noise ratio (SNR), is poor in the lower frequency band and the higher frequency band (SNR is approximately 22 dB), and the state in the middle portion of the band is better (the SNR is approximately 38dB). In general, for single-user (SU) orthogonal frequency division multiple access (OFDMA) applications, the modulation and coding scheme (MCS) of the station STA is determined by the worst SNR of channel CH1; for example, the worst SNR of channel CH1 At approximately 22 dB, the MCS that the station STA communicates with the AP uses 64QAM (Quadrature Amplitude Modulation). The wireless communication method provided by the present invention performs resource unit allocation, thereby allocating RU1, RU2, RU3, and RU4 to the station STA, wherein the MCS used by each of RU1, RU2, RU3, and RU4 is based on the channel CH1. status. For example, resource unit RU1 uses 64QAM, resource unit RU2 uses 256QAM, resource unit RU3 uses 1024QAM, and resource unit RU4 uses 64QAM, as shown in FIG. The above examples are applicable to SU-OFDMA applications, but this is not a limitation of the present invention. For multi-user (MU) OFDMA applications, the wireless communication method provided by the present invention performs RU allocation, thereby allocating resource elements RU1, RU2, RU3, and RU4 to multiple sites. For example, resource elements RU1 and RU2 may be assigned to one communication site, resource unit RU3 is assigned to another communication site, and resource unit RU4 is assigned to yet another communication site, where RU1, RU2, RU3 and RU4 Each MCS used is based on the state of the channel CH.

2 is a schematic diagram of a wireless communication method performed on a channel CH2 in accordance with a second embodiment of the present invention. Channel CH2 occupies a frequency band ranging from frequency FREQ3 to frequency FREQ4. In order to make the station communicate with the access point AP (not shown in FIG. 2), the frequency band is equally divided into four sub-bands, respectively corresponding to the resources Source units RU5, RU6, RU7 and RU8. It should be noted that the frequency bandwidths including the frequencies FREQ3 and FREQ4 are not limitations of the present invention. The number of RUs in the frequency band shown in Fig. 2 is for explanation and explanation purposes only, and can be adjusted according to the width of the frequency band in practical use. According to the previous communication between the AP and the station, the AP can know the status of the channel CH2. The upper part of Fig. 2 depicts the state of the channel CH2. As shown in Fig. 2, the state of the channel CH2, such as the signal-to-noise ratio (SNR), is poor in the lower frequency band and the higher frequency band (SNR is approximately 22 dB), and the state in the middle portion of the band is better (the SNR is approximately 38dB). In order to improve communication quality, the AP may adjust the transmission power in response to the SNR of the sub-bands that communicate with the resource units RU5, RU6, RU7, and RU8. For example, the AP may use higher transmission power (eg, +3 dB as shown in FIG. 2) to communicate in resource units RU5 and RU8, while using lower transmission power (eg, + as shown in FIG. 2) 1dB) communicates with resource units RU6 and RU7. As shown in Fig. 2, all resource elements RU5, RU6, RU7 and RU8 are assigned to the station STA' for communicating with the AP, i.e. for the SU-OFDMA application. Similar to the description of the embodiment of Fig. 1, the wireless communication method of the embodiment of Fig. 2 can also be applied to the MU-OFDMA application. For example, resource elements RU5 and RU7 may be assigned to one site, resource unit RU6 may be assigned to another site, and resource unit RU8 may be assigned to yet another site. Similar to the embodiment described in FIG. 1, the MCS used by each resource unit RU5, RU6, RU7, and RU8 is based on the state according to the channel CH2. It should be noted that the transmission power for each of the resource elements RU5, RU6, RU7, and RU8 in this embodiment is for illustrative purposes only and should not be considered as a limitation of the present invention.

Figure 3 is a diagram showing a wireless communication method performed on a channel CH3 in accordance with a third embodiment of the present invention. Channel CH3 occupies a frequency band ranging from frequency FREQ5 to frequency FREQ6. In order for the station to communicate with the access point AP (not shown in FIG. 3), the frequency band is equally divided into three sub-bands corresponding to the resource units RU9, RU10 and RU11, respectively. It should be noted that the frequency bandwidth determined by the frequencies FREQ5 and FREQ6 is not a limitation of the present invention. The number of RUs in the frequency band shown in Fig. 3 is for explanation and explanation purposes only, and can be adjusted according to the width of the frequency band in practical use. As shown in Figure 3, for MU-OFDMA Application, resource elements RU9 and RU10 are assigned to station STA1, and RU11 is assigned to station STA2. Similar to the description of the embodiment of Fig. 1, the wireless communication method of the embodiment of Fig. 3 can also be applied to the SU-OFDMA application. For example, all resource elements RU9, RU10 and RU11 may be assigned to station STA1 or station STA2. Any of the resource elements RU9, RU10, and RU11 on the channel CH3 may include a different number of communication streams, however, this is not a limitation of the present invention. For example, as shown in FIG. 3, the resource unit RU9 includes six communication streams, the resource unit RU10 includes four communication streams, and the resource unit RU11 includes two communication streams. Through different flows, the AP can communicate with the station (ie, STA1 or STA2) using different transmission powers. More specifically, the AP communicates with the station STA1 in the resource unit RU9, wherein the six streams of the resource unit RU9 each use +1 dB of transmission power. The AP communicates with the station STA1 in the resource unit RU10, wherein the four streams of the resource unit RU10 each use a transmission power of +2 dB. The AP communicates with the station STA2 in the resource unit RU11, wherein the first stream of the resource unit RU11 uses +1 dB of transmission power, and the second stream of the resource unit RU11 uses +2 dB of transmission power. As described in the embodiments of Figures 1 and 2, the MCSs used by resource elements RU9, RU10, and RU11 are all based on the state of channel CH3. For example, the MCS of the resource unit RU9 uses 256QAM, the MCS of the resource unit RU10 uses 64QAM, and the MCS of the resource unit RU11 uses 1024QAM. The above description is for the purpose of explanation only and should not be considered as a limitation of the invention.

For the wireless communication method of the embodiments shown in FIG. 1, FIG. 2, and FIG. 3, each RU can use a different coding scheme, that is, a different low density parity check code (LDPC) or a binary convolutional code. (BBC). Also, each RU can communicate using a different cyclic redundancy check (CRC) or rate adaptation. Further, in the case where the station utilizes more than one RU to communicate with the AP, such as station STA1 in the embodiment of FIG. 3, the station STA1 may use the same or different coding rates for the resource units RU9 and RU10. For example, when resource elements RU9 and RU10 use different MCSs (ie, 64QAM and 256QAM as shown in FIG. 3), station STA1 can communicate with the AP using the same coding rate to reduce the complexity of the transmitter/receiver. . And when the resource units RU9 and RU10 use the same At the MCS, the station STA1 can also communicate with the AP using a different coding rate for each RU.

Fig. 4 is a diagram showing a wireless communication method performed on a channel CH4 according to a fourth embodiment of the present invention. As shown in FIG. 4, the frequency band occupied by the channel CH4 includes only one resource unit RUX, and the RUX includes four communication streams. It should be noted that the number of streams included in the resource unit RUX is for illustrative purposes only and is not a limitation of the present invention. When there is only one resource unit (ie, RUX) on the channel, the stream in the resource unit RUX can be assigned to multiple sites for communication. For example, the first stream and the second stream may be allocated to the station STA3, and the third stream and the fourth stream may be allocated to the station STA4. In general, streams assigned to the same site must use the same MCS. However, in this embodiment, streams assigned to the same site may also use different MCSs. For example, the first stream uses the modulation and coding scheme MCS1, while the second stream uses the modulation and coding scheme MCS2, and both the first stream and the second stream are allocated to the station STA3. As mentioned in the embodiment of Fig. 3, the APs can communicate with the stations (i.e., STA3 or STA4) through different transmission powers via different streams. For example, as shown in FIG. 4, the AP communicates with the station STA3 using different transmission powers (ie, POWER1 and POWER2) in the first stream and the second stream, respectively.

For the wireless communication method related to the embodiments in FIGS. 1 to 4, information for indicating resource unit allocation (or stream allocation) and transmission power may be carried in uplink (UL) or downlink. (DL) Trigger frame for OFDMA applications or High Efficiency (HE) Multi-User (MU) packets.

Figure 5 is a schematic diagram of an electronic device 500 for performing the above described wireless communication method in accordance with an embodiment of the present invention. The electronic device 500 can include a processor 501 and a storage device 502 that stores a program code PROG. When the processor 501 loads and executes the program code PROG, the wireless communication method as in the embodiments of Figs. 1 to 4 can be performed. Those skilled in the art can easily understand the working process of the processor 501 after reading the above paragraphs. Therefore, for the sake of brevity, the detailed description will not be repeated here. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

Claims (20)

A method of wireless communication, comprising: performing resource unit allocation once on a channel; in the primary resource unit allocation, allocating a first resource unit and a second resource unit to a station, wherein the first resource unit is different from the a second resource unit, in the first resource unit, communicating with the station using a first transmission power; and in the second resource unit, communicating with the station using a second transmission power, wherein The second transmission power is different from the first transmission power. The wireless communication method of claim 1, further comprising: using a first modulation and coding scheme (MCS) for the station to communicate in the first resource unit; and using a second modulation and coding The scheme is for the station to communicate in the second resource unit, wherein the second modulation and coding scheme is different from the first modulation and coding scheme. The wireless communication method of claim 2, further comprising: using the first cyclic redundancy code check for the station to communicate in the first resource unit; and using the second cyclic redundancy code Verifying that the station is in communication in the second resource unit, wherein the second cyclic redundancy code check is different from the first cyclic redundancy code check. The wireless communication method of claim 2, further comprising: encoding the first data according to a specific coding rate for communicating in the first resource unit; and applying the second to the specific coding rate Data encoding for communication in the second resource unit. The wireless communication method of claim 1, further comprising: encoding the first data according to the first coding rate for communication in the first resource unit; and pairing the second data rate according to the second coding rate Data encoding for communicating in the second resource unit, wherein the second coding rate is different from the first coding rate. The wireless communication method of claim 1, wherein the first resource unit comprises a plurality of streams, the second resource unit comprises a plurality of streams, and the method further comprises: using the first resource a first number of streams in the unit for causing the station to communicate; and a second number of streams in the second resource unit for communicating the station, wherein the second resource The second number of streams of cells is different from the first number of streams of the first resource unit. The wireless communication method of claim 1, further comprising: using a first rate adaptation for the station to communicate in the first resource unit; and using a second rate adaptation for the The station communicates in the second resource unit, wherein the second rate adaptation is different from the first rate adaptation. The wireless communication method of claim 1, wherein the information indicating that the primary resource unit is allocated is carried in a trigger frame or an efficient multi-user packet. A method of wireless communication, comprising: using a first stream in a resource unit and a first modulation and coding scheme for causing a station to communicate in a channel; and using a second stream in the resource unit and a second modulation and coding scheme For making the site in place Communication in a channel, wherein the second stream is different from the first stream, and the second modulation and coding scheme is different from the first modulation and coding scheme. The wireless communication method of claim 9, further comprising: communicating with the station using the first transmission power in the first stream; and using the second transmission power in the second stream Communicating with the station, wherein the second transmission power is different from the first transmission power. The wireless communication method of claim 9, further comprising: using the first cyclic redundancy code check for the station to communicate in the first stream; and using the second cyclic redundancy code check Used for the station to communicate in the second stream, wherein the second cyclic redundancy code check is different from the first cyclic redundancy code check. The wireless communication method of claim 9, further comprising: using a third stream in the resource unit and a third modulation and coding scheme for causing another station to communicate in the channel; The third stream is different from the first stream, and the third modulation and coding scheme is different from the first modulation and coding scheme. An electronic device comprising: a storage device for storing a code; and a processor for executing the code; wherein the code indicates when the code is loaded and executed by the processor The processor performs the following steps: Performing a resource unit allocation on the channel; in the primary resource unit allocation, allocating a first resource unit and a second resource unit to the station, wherein the first resource unit is different from the second resource unit; Transmitting, in the first resource unit, the first transmission power to the station; and, in the second resource unit, communicating with the station using a second transmission power, wherein the second transmission power is The first transmission power is different. The electronic device of claim 13, wherein the code indicates that the processor further performs the step of using a first modulation and coding scheme for the station in the first resource unit Communicating; and using the second modulation and coding scheme for the station to communicate in the second resource unit, wherein the second modulation and coding scheme is different than the first modulation and coding scheme. The electronic device of claim 14, wherein the code indicates that the processor further performs the step of encoding the first data at a specific coding rate for use in the first resource unit Communicating; and encoding the second data for the particular resource rate for communication in the second resource unit. The electronic device of claim 13, wherein the code indicates that the processor further performs the step of encoding the first data according to the first coding rate for use in the first resource unit And communicating the second data for communication in the second resource unit, wherein the second coding rate is different from the first coding rate. The electronic device of claim 13, wherein the first resource unit comprises a plurality of streams, and the second resource unit comprises a plurality of streams, the code indicating that the processor further performs the following Step: using a first number of streams in the first resource unit for communicating with the station; and using a second number of streams in the second resource unit for communicating the station And wherein the second number of streams of the second resource unit is different from the first number of streams of the first resource unit. An electronic device comprising: a storage device for storing a code; and a processor for executing the code; wherein the code indicates when the code is loaded and executed by the processor The processor performs the steps of: using a first stream in a resource unit and a first modulation and coding scheme for causing a station to communicate in a channel; and using a second stream in the resource unit and a second modulation and coding a scheme for causing the station to communicate in the channel, wherein the second stream is different from the first stream, and the second modulation and coding scheme is different from the first modulation and coding scheme. The electronic device of claim 18, wherein the code indicates that the processor further performs the step of: communicating with the station using the first transmission power in the first stream; In the second stream, the second transmission power is used to communicate with the station, wherein the second transmission power is different from the first transmission power. The electronic device of claim 18, wherein the code indicates that the processor further performs the step of using a third stream of the resource unit and a third modulation and coding scheme for enabling Another station communicates in the channel; wherein the third stream is different from the first stream, and the third modulation and coding scheme is different from the first modulation and coding scheme.