CN113873672B - Access method and system - Google Patents
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- CN113873672B CN113873672B CN202110948780.2A CN202110948780A CN113873672B CN 113873672 B CN113873672 B CN 113873672B CN 202110948780 A CN202110948780 A CN 202110948780A CN 113873672 B CN113873672 B CN 113873672B
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- 230000007246 mechanism Effects 0.000 claims description 20
- 230000002618 waking effect Effects 0.000 claims description 9
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- 238000004891 communication Methods 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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Abstract
The invention discloses an access method and a system, wherein the method comprises the following steps: the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID; grouping the corresponding stations according to the newly allocated AIDs; each station in the station group of the round of wake-up selects an available random access resource unit for access; the invention is based on AID allocation and grouping of the new association site, and can effectively reduce the possibility of collision when the UORA process competes for the random access resource unit.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an access method and system.
Background
Ieee802.11ax introduces an orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) technology, divides a frequency domain resource into a plurality of Resource Units (RU), allows a plurality of users to access a channel and transmit simultaneously through different resource units, and improves the utilization rate of the channel. Wherein the access point provides a portion of uplink resource units (ULRUs) to allow users to perform uplink OFDMA random access (UL-OFDMA Random Access, UORA). The access point triggers a UORA procedure by sending a Trigger Frame (Trigger Frame), and an association identifier (association identifier, AID) of a User Info field in the Trigger Frame indicates a random access manner of each resource unit, and for an uplink resource unit indicated as aid=0, the resource unit is a random access resource unit (Random access resource unit, RARU) for a station allocated with AID, and the station allocated with AID randomly selects the RARU to perform access contention, which inevitably generates a collision.
Disclosure of Invention
In view of the foregoing, an object of the present invention is to provide an access method and system, which can effectively reduce the collision possibility when the UORA procedure contends for the random access resource unit.
In a first aspect, an embodiment of the present invention provides an access method, including:
the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID;
grouping the corresponding stations according to the newly allocated AIDs;
each station in the station group of the round of wake-up selects an available random access resource unit for access.
As an improvement of the above solution, each station in the station group of the wake-up round selects an available random access resource unit for access, including:
determining a number set of available resource units of each station of the station group of the wake-up round according to the random access identifier of each station of the station group of the wake-up round; wherein, the random access identifier of the station is calculated according to the AID;
each station of the station group awakened in the round selects one available random access resource unit from the intersection of the number set of the available resource units of the station and the number set of the random access resource unit, the access point of which indicates that the round can be used for random access of the allocated AID station, so as to access.
As an improvement of the above solution, after grouping the corresponding stations according to the newly allocated AID, the method further includes:
and carrying out timing wakeup on each station group in the corresponding timing wakeup mechanism service period.
As an improvement of the above solution, the configuration information includes a random access identifier of the station.
As an improvement of the above solution, the allocating, by the access point, the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID, includes:
the access point performs grouping statistics on the stations allocated with the AIDs to obtain corresponding first station numbers; wherein each group of stations assigned AID has the same random access identifier;
and the access point selects the random access identifier corresponding to the minimum first station number, and selects an AID which is not used by the station to which the AID is allocated to be allocated to the station to which the AID is allocated according to the random access identifier corresponding to the minimum first station number and the maximum number of resource units of the access point.
As an improvement of the above solution, the selecting an AID that is not used by the station to which the AID is allocated to the station to which the AID is to be allocated according to the random access identifier corresponding to the minimum number of first stations and the maximum number of resource units of the access point includes:
selecting an AID satisfying a preset allocation condition from among AIDs not used by the stations to which the AID has been allocated, and allocating the AID to the station to which the AID is to be allocated;
and the allocation condition is that the value of the random access identifier corresponding to the minimum first station number is equal to the remainder obtained by dividing the value of AID by the maximum number of resource units of the access point.
As an improvement of the above solution, the allocating, by the access point, the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID, includes:
the access point determines the random access identifier of the station to be allocated with the AID according to the random access identifier of the station allocated with the AID, the resource unit of the access point and a preset first mapping relation; wherein the first mapping relation is that the number of one resource unit corresponds to the value of one random access identifier;
the access point determines the AID of the station to be allocated with the AID according to the random access identifier of the station to be allocated with the AID and a preset second mapping relation; wherein the second mapping relationship is that a value of the random access identifier corresponds to a value of at least one AID.
As an improvement of the above solution, the grouping the corresponding stations according to the newly allocated AID includes:
the access point judges whether a new timing wake-up mechanism service period can be inserted into the vacant time period according to the existing site group and the timing wake-up mechanism service period;
if yes, a corresponding site group is newly established on the newly inserted timing wake-up mechanism service period according to the sites to be allocated with AIDs;
if not, the station to which the AID is to be allocated is allocated to the existing station group.
As an improvement of the above solution, the allocation of the station to which the AID is to be allocated to the existing station group includes:
counting the number of second stations with random access identifiers identical to the stations to be allocated with AIDs in each existing station group;
and distributing the stations to be distributed with the AIDs to the station group corresponding to the minimum second station number.
As an improvement of the above solution, the allocating the stations to be allocated with AID to the station group corresponding to the minimum second station number includes:
when the second site number of the plurality of existing site groups is equal to the minimum second site number, counting the total number of sites in each of the existing site groups corresponding to the minimum second site number;
and distributing the stations to be distributed with the AID to the station group corresponding to the minimum total number.
As an improvement of the above solution, the determining, according to the random access identifier of each station of the station group that wakes up in this round, a number set of resource units available for each station of the station group that wakes up in this round includes:
and obtaining a number set of available resource units of each station of the station group of the wake-up round according to the number of the resource unit corresponding to the value of the random access identifier of each station of the station group of the wake-up round.
As an improvement of the above solution, the method further includes:
when a number set of resource units available to a station and an access point indicate that no intersection exists in the number set of random access resource units available to the station for random access by the station with the AID allocated, the station expands the number set of the resource units available to the station according to the number of contention failures before waking up of the station until the number set of the resource units available to the station after expansion comprises at least one number in the number set of the random access resource units;
and randomly selecting a random access resource unit from the number set of the resource units available to the extended station for access.
As an improvement of the above solution, the expanding, by the station, the number set of available resource units of the station according to the number of contention failures before waking up in this round includes:
selecting N from the high-frequency direction and the low-frequency direction by taking the resource unit corresponding to the number of the random access resource unit as the center ext Resource units and N is selected ext The number of each resource unit is extended to the number set of the resource units available to the station;
wherein,N Re indicating the number of competition failures, f Re Representing a preset retransmission factor;
when the number set of the resource units available to the extended station does not have the number of the available random access resource units of the wake-up round, the competition failure times N Re Adding 1, and re-selecting resource units in the high-frequency direction and the low-frequency direction until a preset expansion condition is met;
wherein, the expansion condition is: the number set of the resource units available to the extended station has the number of the random access resource units available to the present round or the number of the resource units of the number set of the resource units available to the extended station reaches the maximum number of the resource units of the access point.
In a second aspect, an embodiment of the present invention provides an access system, including an access point and a station;
the access point is used for distributing the AID to the station to be distributed according to the station distributed with the AID;
the access point is used for grouping corresponding stations according to the newly allocated AIDs;
each station in the station group of the round of wake-up is used for selecting an available random access resource unit for access.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the access point allocates the AID to the station to be allocated with the AID according to the random access identifier of the station allocated with the AID; grouping the corresponding stations according to the newly allocated AIDs; each station in the station group of the round of wake-up selects an available random access resource unit for access. The invention is based on AID allocation and grouping of the new associated stations, and can effectively reduce the collision possibility when the UORA process competes for the random access resource unit.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an access method according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a site group provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of an access system according to a second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of this application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
For a better understanding of the scheme, the following is a brief description of the terms involved in the present invention:
an association identifier, association identifier, AID, indicating a random access manner of each resource unit;
resource unit, RU: in the communication access process, dividing frequency domain resources into a plurality of RUs, and allowing a plurality of users to access channels and transmit through different RUs simultaneously;
uplink resource units, UL resource units, ULRUs, the access point may provide a portion of the ULRU to allow users to perform uplink OFDMA random access (UL-OFDMA Random Access, UORA);
random access resource unit, random access resource unit, RARU: the access point triggers a UORA process by sending a trigger frame, wherein the trigger frame indicates the random access indication of each resource unit through an AID field, and for a ULRU indicated as aid=0, the trigger frame is the RARU of the user equipment station for which the AID is allocated;
a Wake-on-timing (TWT) mechanism: controlling the number of stations transmitted simultaneously, enabling different stations to access a network through TWT at different timing wake-up mechanism service periods (TWT Service Periods, TWT SP) for data interaction, and entering a sleep mode until the next TWT SP when the TWT SP is ended;
uplink OFDMA random access, UL-OFDMA Random Access, UORA;
referring to fig. 1, a flowchart of an access method according to a first embodiment of the present invention is shown, where the access method includes:
s11: an Access Point (AP) allocates an AID to a station to be allocated with the AID according to configuration information of the Station (STA) allocated with the AID;
s12: grouping the corresponding stations according to the newly allocated AIDs;
the number of sites with the same RAID in each site group after grouping is minimum, namely, the RAID of the sites in the same site group is ensured to be different as much as possible.
S13: each station in the station group of the round of wake-up selects an available random access resource unit for access.
The embodiment of the invention allocates AIDs to the new associated stations based on the configuration information of the allocated AIDs, and groups the AIDs, so that the conflict possibility when the UORA process competes for the random access resource units can be effectively reduced.
In an alternative embodiment, step S13: each station in the station group of the round of wake-up selects an available random access resource unit for access, and the method comprises the following steps:
determining a number set of available resource units of the station awakened in the round according to the random access identifier of the station awakened in the round; wherein, the random access identifier of the station is calculated according to the AID;
in the embodiment of the present invention, a random access identifier, random Access identifier, RAID is predefined. The random access identifier of any station has a specific mapping relation with its AID. For example, the random access identifier of any station is a bit value of some bits in its AID, or is calculated by performing a specific arithmetic operation rule on its AID, which is not necessarily limited herein.
The station awakening in the round selects one random access resource unit from the intersection of the number set of the resource units available to the station and the number set of the random access resource unit, the access point indicates that the round can be used for random access by the allocated AID station, and the random access resource unit is accessed.
It should be noted that, the resource units available to the station calculated by the station according to the random access identifier are called a number set of the resource units available to the station. And the present round of access point sends a trigger frame, wherein, the random access resource unit indicating aid=0 is called an access point indicating the number set of random access resource units that the present round of access point can use for the allocated AID station to perform random access.
Illustratively, after station association, the access point assigns a unique AID to the station. In the embodiment of the invention, when a station is newly associated or re-associated, a random access identifier is set for the newly associated or re-associated station based on the configuration information of the station allocated with the AID, a plurality of stations may have the same random access identifier value, and the AID is allocated to the newly associated or re-associated station based on the random access identifier. For the station group awakened in the round, each station determines the number set of the available resource units based on the random access identifier, and selects one available random access resource unit from the intersection of the number set of the available resource units of the station and the number set of the random access resource units of the access point indicating that the round can be used for random access by the allocated AID station for access. The invention carries out the allocation of AID and the selection of random access resource units based on the random access identifier, and can effectively reduce the collision possibility when the UORA process competes for the random access resource units.
In an alternative embodiment, the configuration information comprises a random access identifier of the station.
In an alternative embodiment, the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID, including:
the access point performs grouping statistics on the stations allocated with the AIDs to obtain corresponding first station numbers; wherein each group of stations assigned AID has the same random access identifier;
and the access point selects the random access identifier corresponding to the minimum first station number, and selects an AID which is not used by the station to which the AID is allocated to be allocated to the station to which the AID is allocated according to the random access identifier corresponding to the minimum first station number and the maximum number of resource units of the access point.
Wherein the maximum number of resource units of the access point is the maximum number of resource units supportable by the maximum bandwidth currently supported by the access point.
In an optional embodiment, the selecting an AID that is not used by the station to which the AID is allocated to the station to which the AID is to be allocated according to the random access identifier corresponding to the minimum first station number and the maximum number of resource units of the access point includes:
selecting an AID satisfying a preset allocation condition from among AIDs not used by sites to which the AID has been allocated; and the allocation condition is that the value of the random access identifier corresponding to the minimum first station number is equal to the remainder obtained by dividing the value of AID by the maximum number of resource units of the access point.
In the embodiment of the invention, the AID allocation process is specifically as follows:
1. for the followingEach station assigned with AID has a random access identifier, and multiple stations may have the same random access identifier value, and the number of stations under a random access identifier value is recorded as STACount RAID ；
2. For each newly associated or re-associated STA x Selecting the minimum STACount RAID A corresponding random access identifier value;
3. selecting an AID not used by the assigned AID site, wherein the selected AID satisfies RAID = AID%n RU,max Wherein RAID is the minimum STACount RAID Corresponding RAID,% represents remainder, N RU,max Represents the number of maximum resource units that the access point can support for the maximum bandwidth currently supported, N RU,max Can be determined by the number of RUs supported under different bandwidths specified by the protocol, wherein RUs size ＝26Tone。
In the embodiment of the invention, the maximum number of the resource units of the access point which can be supported in the maximum bandwidth currently supported by the access point is utilized to carry out remainder calculation on the AID, a random access identifier is obtained, the AID is allocated to the stations which are newly associated or are to be allocated with the AID again based on the calculated random access identifier, the selection of the random access resource units is carried out when the stations are indicated to carry out UORA by combining the random access identifier, and the possibility of collision when the UORA process competes for the random access resource units can be reduced.
In an alternative embodiment, the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID, including:
the access point determines the random access identifier of the station to be allocated with the AID according to the random access identifier of the station allocated with the AID, the resource unit and a preset first mapping relation; wherein the first mapping relation is that the number of one resource unit corresponds to the value of one random access identifier;
the access point determines the AID of the station to be allocated with the AID according to the random access identifier of the station to be allocated with the AID and a preset second mapping relation; wherein the second mapping relationship is that a value of the random access identifier corresponds to a value of at least one AID.
Illustratively, a specific mapping relationship is specified: one RU number corresponds to one RAID. For example, the number of corresponding RU of raid=101=1, the number of corresponding RU of raid=102=2, and the RU number of raid=x=x-100. And one RAID corresponds to at least one AID, for example, aid= [0, N) corresponds to raid=101, aid= [ N, 2N) corresponds to raid=102, and so on, N is a constant, for example, n=the number of maximum resource units may be selected. The access point ensures the serial numbers 0,1, …, N of RU when allocating AID to the newly associated or re-associated site RU, The RAID mapping corresponding to-1 is as average as possible on the AID and does not conflict. When UORA is carried out, the site calculates RAID according to the mapping relation between AID and RAID, and selects RU according to the mapping relation between RAID and RU number.
In an alternative embodiment, after grouping the corresponding stations according to the newly allocated AID, the method further includes:
and carrying out timing wakeup on each station group in the corresponding timing wakeup mechanism service period.
In an alternative embodiment, the grouping the corresponding stations according to the newly allocated AID includes:
the access point judges whether a new timing wake-up mechanism service period can be inserted into the vacant time period according to the existing site group and the timing wake-up mechanism service period;
if yes, a corresponding site group is newly established on the newly inserted timing wake-up mechanism service period according to the sites to be allocated with AIDs;
if not, the station to which the AID is to be allocated is allocated to the existing station group.
In an alternative embodiment, the allocating the station to which the AID is to be allocated to the existing station group includes:
counting the number of second stations with random access identifiers identical to the stations to be allocated with AIDs in each existing station group;
and distributing the stations to be distributed with the AIDs to the station group corresponding to the minimum second station number.
In an optional embodiment, the allocating the stations to be allocated with AID to the station group corresponding to the minimum second station number includes:
when the second site number of the plurality of existing site groups is equal to the minimum second site number, counting the total number of sites in each of the existing site groups corresponding to the minimum second site number;
and distributing the stations to be distributed with the AID to the station group corresponding to the minimum total number.
In the embodiment of the present invention, referring to fig. 2, based on the TWT mechanism, stations that request to establish a TWT are grouped for each new association or re-association, so that the number of stations in each TWT station group is substantially the same, and the values of random access identifiers of stations in the same station group are as different as possible. For each station in the group of stations that wakes up for the present round, a set of numbers of the respective available resource units is determined based on the random access identifier. The number of stations of each station group is balanced through the distribution of AIDs and the grouping of stations, and the probability of collision when the UORA process competes for the random access resource units can be effectively reduced by combining the selection of the random access resource units based on the random access identifiers.
In an optional embodiment, the determining the number set of the resource units available to the station that wakes up in this round according to the random access identifier of the station that wakes up in this round includes:
and obtaining a number set of the resource units available to the station of the round according to the number of the resource units corresponding to the value of the random access identifier of the station of the round of wakeup.
In an alternative embodiment, the method further comprises:
when a number set of resource units available to a station and an access point indicate that no intersection exists in the number set of random access resource units available to the station for random access by the station with the AID allocated, the station expands the number set of the resource units available to the station according to the number of contention failure times before waking up the station until the number set of the resource units available to the station after expansion comprises the number of the random access resource units;
and randomly selecting a random access resource unit from the number set of the resource units available to the extended station for access.
Illustratively, resource units RU are RU in order from low frequency to high frequency j ,j＝1,2,3,...,N RU,max The method comprises the steps of carrying out a first treatment on the surface of the Each site maintains its number of competing failures before the current round UORA individually as N Re The method comprises the steps of carrying out a first treatment on the surface of the If the competition is successful, N is selected Re And setting 0.STA (station) x The number set of the RU which can be selected is recorded as RUSet x The method comprises the steps of carrying out a first treatment on the surface of the When the access point sends the trigger frame, the random access resource unit (aid=0) which can be used for random access by the station allocated with AID is indicated, and the number set of the random access resource unit is denoted as RARUSet x The number of random access resource units is denoted as N RARU . RAID with mapping relation between random access identifier and AID x ＝AID x ％N RU,max For example, for the station group where the TWT SP wakes up for the present round, each STA x The random access resource unit selection procedure of (a) is as follows:
1、STA x RAID according to formula x ＝AID x ％N RU,max Calculating a random access identifier with the AID of the self, and obtaining the number of the corresponding resource unit as the STA according to the mapping relation between the random access identifier and the resource unit x Number set RUSet of selectable resource units x The method comprises the steps of carrying out a first treatment on the surface of the Wherein N is RU，max Representing the maximum number of supportable resource units in the maximum bandwidth currently supported by the access point;
2. if the number sets RUSet x The number of the random access resource unit which is used for wake-up of the TWT SP of the present wheel is contained, namely the number is RAID x Corresponding resource unitsRandom access resource unit available for this round +.>Then select RAID number x Corresponding resource unit->
3. If the number sets RUSet x The number of the random access resource unit which does not contain the wake-up available of the TWT SP of the present wheel is RAID x Corresponding resource unitsRandom access resource units not available for this round +.>Then based on STA x Number of contention failures before waking up of the present round N Re Extended STA x Number set RUSet of selectable resource units x Up to RUSet x The number of the random access resource unit available by the UORA of the round is included, namely RARUSet x ∩RUSet x ≠φ，/>Representing empty set, STA x And randomly selecting an available random access resource unit from the intersection of the number set of the resource unit and the number set of the random access resource unit of which the access point indicates that the round can be used for random access by the allocated AID station for access.
The embodiment of the invention carries out random access resource unit selection based on the random access identifier, adjusts the range of randomly selected random access resource units of each site by combining the UORA competition failure times of the sites, can limit the range of the randomly selected random access resource units of the sites, reduces the number of sites competing for the same random access resource unit at the same time, thereby reducing the probability that the same random access resource unit is preempted by other sites and increasing the probability of successful site competition of multiple competition failures.
In an optional embodiment, the expanding the number set of the resource units available to the station according to the number of contention failures before waking up in this round includes:
to correspond to the available random access resource unitsThe number of the resource unit is taken as the center, N is selected towards the high-frequency direction and the low-frequency direction respectively ext Resource units and N is selected ext The number of each resource unit is extended to the number set of the resource units available to the station;
wherein,N Re indicating the number of competition failures, f Re Representing a preset retransmission factor;
when the number set of the resource units available to the extended station does not have the number of the available random access resource units of the wake-up round, the competition failure times N Re Adding 1, and re-selecting resource units in the high-frequency direction and the low-frequency direction until a preset expansion condition is met;
wherein, the expansion condition is: the number set of the resource units available to the extended station has the number of the available random access resource units of the wake-up round or the number of the resource units of the number set of the resource units available to the extended station reaches the maximum number of the resource units of the access point.
For the number set RUSet x The embodiment of the invention is based on STA under the condition that the number of the random access resource unit available for wake-up of the TWT SP of the present wheel is not included x Number of contention failures before waking up of the present round N Re Extended STA x Selectable RU number set RUSet x The specific process is as follows:
1. to be used forFor the center, in the range from the preset low frequency limit to the preset high frequency limit, the +.>Each RU; if the low frequency limit/high frequency limit is exceeded, continuing to select from the high frequency/low frequency;
2. if the random access resource unit does not exist in the preset selection rangeThe random access resource unit available for the round will be N Re Updated to N Re +1 up to RUset x Including the number of RUs supported under access point bandwidth, i.eOr find out the available random access resource unit of the TWT SP wake-up of the present round.
Wherein f Re Defined as retransmission factors, used to assist in adjusting RU selectable ranges, not necessarily limited herein.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
1. by defining a random access identifier related to the AID and allocating the AID of the station based on the random access identifier, the random access identifier indicates the station to select a random access resource unit in the UORA process, and the collision possibility in the UORA process competing for the random access resource unit is reduced;
2. site grouping is carried out based on a TWT mechanism, the number of sites of each TWT site group is balanced, and the probability of collision when the UORA process competes for the random access resource unit can be effectively reduced by combining with the selection of the random access resource unit based on the random access identifier;
3. the random access resource unit selection is carried out based on the random access identifier, the range of randomly selected random access resource units of each site is adjusted by combining the UORA competition failure times of the sites, the range of the selected random access resource units of the sites can be limited, the number of sites competing for the same random access resource unit at the same time is reduced, the probability that the same random access resource unit is preempted by other sites is reduced, and the probability that the sites with multiple competition failures compete successfully is increased; meanwhile, when the random access resource units are more than the allocated AID sites which perform random access competition in the round, the probability of random access conflict of the allocated AID sites in the UORA process is reduced.
Referring to fig. 3, a second embodiment of the present invention provides an access system, including an access point and a station;
the access point is used for distributing the AID to the station to be distributed with the AID according to the configuration information of the station to be distributed with the AID;
the access point is used for grouping corresponding stations according to the newly allocated AIDs;
each station in the station group of the round of wake-up is used for selecting an available random access resource unit for access.
In an optional embodiment, each station in the station group of the wake-up round is configured to determine, according to the random access identifier of each station in the station group of the wake-up round, a number set of resource units available for each station in the station group of the wake-up round; wherein, the random access identifier of the station is calculated according to the AID;
each station in the station group of the wake-up round is used for selecting one available random access resource unit from the intersection of the number set of the resource units available to the station and the number set of the random access resource unit of the access point indication round which is used for the random access of the allocated AID station to access.
In an alternative embodiment, the access point is further configured to wake up each station group at a timing corresponding to a timing wake-up mechanism service period.
In an alternative embodiment, the configuration information comprises a random access identifier of the station.
In an optional embodiment, the access point is configured to perform grouping statistics on the stations allocated with the AID to obtain a corresponding first number of stations; wherein each group of stations assigned AID has the same random access identifier;
the access point is configured to select a random access identifier corresponding to the minimum number of first stations, and select an AID that is not used by the station to which the AID is allocated to allocate to the station to which the AID is to be allocated according to the random access identifier corresponding to the minimum number of first stations and the maximum number of resource units of the access point.
In an alternative embodiment, the access point is configured to select an AID that meets a preset allocation condition from among the AIDs that are not used by the station to which the AID has been allocated; and the allocation condition is that the value of the random access identifier corresponding to the minimum first station number is equal to the remainder obtained by dividing the value of AID by the maximum number of resource units of the access point.
In an optional embodiment, the access point is configured to determine, according to a random access identifier of a station to which the AID is allocated, a resource unit, and a preset first mapping relationship, a random access identifier of a station to which the AID is to be allocated; wherein the first mapping relation is that the number of one resource unit corresponds to the value of one random access identifier;
the access point is configured to determine an AID of a station to be allocated with the AID according to a random access identifier of the station to be allocated with the AID and a preset second mapping relationship; wherein the second mapping relationship is that a value of the random access identifier corresponds to a value of at least one AID.
In an optional embodiment, the access point is configured to determine, according to an existing station group and a timing wake-up mechanism service period thereof, whether a new timing wake-up mechanism service period can be inserted in the spare time period; if yes, a corresponding site group is newly established on the newly inserted timing wake-up mechanism service period according to the sites to be allocated with AIDs; if not, the station to which the AID is to be allocated is allocated to the existing station group.
In an alternative embodiment, the access point is configured to count a second number of stations in each existing station group that have the same random access identifier as the station to be assigned with the AID;
the access point is configured to allocate the stations to be allocated with the AID to a station group corresponding to the minimum second station number.
In an optional embodiment, the access point is configured to, when the second number of sites of the plurality of existing site groups is equal to the minimum second number of sites, count the total number of sites in the plurality of existing site groups corresponding to the minimum second number of sites;
the access point is configured to allocate the stations to be allocated with the AID to a station group corresponding to the minimum total number.
For each station in the group of stations that wake up for this round:
in an alternative embodiment, the station is configured to obtain a number set of resource units available to the station according to a number of a resource unit corresponding to a value of a random access identifier of the station.
In an optional embodiment, when the number set of the resource units available to the station and the number set of the random access resource units available to the station for random access by the station indicated by the access point do not have an intersection, the station is configured to expand the number set of the resource units available to the station according to the number of contention failures before waking up the station until the number set of the resource units available to the station after expansion includes the number of the random access resource units;
the station is used for randomly selecting a random access resource unit from the number set of the resource units available to the extended station for access.
In an alternative embodiment, the station is configured to select N in the high frequency direction and the low frequency direction with respect to the resource unit corresponding to the number of the available random access resource units as the center ext Resource units and N is selected ext The number of each resource unit is extended to the number set of the resource units available to the station;
wherein,N Re indicating the number of competition failures, f Re Representing a preset retransmission factor;
the station is configured to, when the number set of resource units available to the extended station does not have the number of random access resource units available for the wake-up of the round, determine the number N of contention failures Re Adding 1, and re-selecting resource units in the high-frequency direction and the low-frequency direction until a preset expansion condition is met;
wherein, the expansion condition is: the number set of the resource units available to the extended station has the number of the random access resource units available for the wake-up of the round or the number of the resource units of the number set of the resource units available to the extended station reaches the maximum number of the resource units of the access point.
It should be noted that the principles and technical effects related to the access system in the embodiment of the present invention are the same as those of the access method in the first embodiment, and are not repeated here.
It should be noted that the system embodiments described above are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the system embodiment of the present invention, the connection relationship between the modules represents that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (12)
1. An access method, comprising:
the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID; wherein the configuration information includes a random access identifier of a station;
grouping the corresponding stations according to the newly allocated AIDs;
each station in the station group of the round of wake-up selects an available random access resource unit for access;
the access point allocates the AID to the station to be allocated with the AID according to the configuration information of the station allocated with the AID, and the method comprises the following steps:
the access point performs grouping statistics on the stations allocated with the AIDs to obtain corresponding first station numbers; wherein each group of stations assigned AID has the same random access identifier;
and the access point selects the random access identifier corresponding to the minimum first station number, and selects an AID which is not used by the station to which the AID is allocated to be allocated to the station to which the AID is allocated according to the random access identifier corresponding to the minimum first station number and the maximum number of resource units of the access point.
2. The access method of claim 1, wherein each station in the group of stations that wake up in the round selects an available random access resource unit for access, comprising:
determining a number set of available resource units of each station in the station group of the wake-up round according to the random access identifier of each station in the station group of the wake-up round; wherein, the random access identifier of the station is calculated according to the AID;
stations in the station group of the wake-up round select one available random access resource unit from the intersection of the number set of the available resource units of the stations and the number set of the random access resource units of the access point indication round available for random access of the allocated AID stations for access.
3. The access method of claim 1, wherein after grouping the corresponding stations according to the newly allocated AID, further comprising:
and carrying out timing wakeup on each station group in the corresponding timing wakeup mechanism service period.
4. The access method of claim 1, wherein selecting an AID not used by the station to which the AID is allocated to the station to which the AID is to be allocated according to the random access identifier corresponding to the minimum number of first stations and the maximum number of resource units of the access point, comprises:
selecting an AID satisfying a preset allocation condition from among AIDs not used by the stations to which the AID has been allocated, and allocating the AID to the station to which the AID is to be allocated; and the allocation condition is that the value of the random access identifier corresponding to the minimum first station number is equal to the remainder obtained by dividing the value of AID by the maximum number of resource units of the access point.
5. The access method of claim 1, wherein the access point allocates the AID to the station to be allocated with the AID according to configuration information of the station to which the AID has been allocated, comprising:
the access point determines the random access identifier of the station to be allocated with the AID according to the random access identifier of the station allocated with the AID, the resource unit of the access point and a preset first mapping relation; wherein the first mapping relation is that the number of one resource unit corresponds to the value of one random access identifier;
the access point determines the AID of the station to be allocated with the AID according to the random access identifier of the station to be allocated with the AID and a preset second mapping relation; wherein the second mapping relationship is that a value of the random access identifier corresponds to a value of at least one AID.
6. The access method of claim 1, wherein grouping the respective stations according to the newly allocated AID comprises:
the access point judges whether a new timing wake-up mechanism service period can be inserted into the vacant time period according to the existing site group and the timing wake-up mechanism service period;
if yes, a corresponding site group is newly established on the newly inserted timing wake-up mechanism service period according to the sites to be allocated with AIDs;
if not, the station to which the AID is to be allocated is allocated to the existing station group.
7. The access method of claim 6, wherein the assigning stations to which AID is to be assigned to the existing station group comprises:
counting the number of second stations with random access identifiers identical to the stations to be allocated with AIDs in each existing station group;
and distributing the stations to be distributed with the AIDs to the station group corresponding to the minimum second station number.
8. The access method of claim 7, wherein the allocating the stations to be allocated with AID to the station group corresponding to the minimum second station number includes:
when the second site number of the plurality of existing site groups is equal to the minimum second site number, counting the total number of sites in each of the existing site groups corresponding to the minimum second site number;
and distributing the stations to be distributed with the AID to the station group corresponding to the minimum total number.
9. The access method of claim 2, wherein the determining the number set of resource units available to each station of the group of stations that wakes up in this round based on the random access identifiers of each station of the group of stations that wakes up in this round comprises:
and obtaining a number set of available resource units of each station of the station group of the wake-up round according to the number of the resource unit corresponding to the value of the random access identifier of each station of the station group of the wake-up round.
10. The access method of claim 8, wherein the method further comprises:
when a number set of resource units available to a station and an access point indicate that no intersection exists in the number set of random access resource units available to the station for random access by the station with the AID allocated, the station expands the number set of the resource units available to the station according to the number of contention failures before waking up of the station until the number set of the resource units available to the station after expansion comprises at least one number in the number set of the random access resource units;
and randomly selecting a random access resource unit from the number set of the resource units available to the extended station for access.
11. The access method of claim 9, wherein the expanding the number set of resource units available to the station according to the number of contention failures before waking up the station in this round comprises:
selecting a resource unit corresponding to the random access identifier value as a center in a high-frequency direction and a low-frequency directionResource units and to be selected +.>The number of each resource unit is extended to the number set of the resource units available to the station;
wherein,，/>indicates the number of competition failures, +.>Representing a preset retransmission factor;
when the number set of the resource units available to the extended station does not have the number of the random access resource units available in the round, the number of the competition failure times is increasedAdding 1, and re-selecting resource units in the high-frequency direction and the low-frequency direction until a preset expansion condition is met;
wherein, the expansion condition is: the number set of the resource units available to the extended station has the number of the random access resource units available for the wake-up of the round or the number set of the resource units available to the extended station has the number of the resource units available to the station up to the maximum number of the resource units of the access point.
12. An access system, comprising an access point and a station;
the access point is used for distributing the AID to the station to be distributed with the AID according to the configuration information of the station to be distributed with the AID; wherein the configuration information includes a random access identifier of a station;
the access point is used for grouping corresponding stations according to the newly allocated AIDs;
each station in the station group of the round of wake-up is used for selecting an available random access resource unit for access;
the access point is configured to allocate an AID to a station to be allocated with the AID according to configuration information of the station allocated with the AID, and includes:
the access point is used for grouping and counting the corresponding first station number of the stations allocated with the AID; wherein each group of stations assigned AID has the same random access identifier;
the access point is configured to select a random access identifier corresponding to the minimum number of first stations, and select an AID that is not used by the station to which the AID is allocated to allocate to the station to which the AID is to be allocated according to the random access identifier corresponding to the minimum number of first stations and the maximum number of resource units of the access point.
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| EP3414968B1 (en) * | 2016-03-08 | 2020-10-14 | Huawei Technologies Co., Ltd. | Random access mechanism for access point and station in a wireless communication network |
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| US10462816B2 (en) * | 2017-04-17 | 2019-10-29 | Qualcomm Incorporated | Trigger-based random access in a multiple BSSID network |
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