CN104640229A - UE accessing method, UE and base station - Google Patents
UE accessing method, UE and base station Download PDFInfo
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- CN104640229A CN104640229A CN201310545572.3A CN201310545572A CN104640229A CN 104640229 A CN104640229 A CN 104640229A CN 201310545572 A CN201310545572 A CN 201310545572A CN 104640229 A CN104640229 A CN 104640229A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
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Abstract
The present invention discloses a user equipment (UE) accessing method comprising: receiving access mode auxiliary information (AMAI) sent from a base station; receiving a competition-based resource informed by the base station; determining an access mode of data in a cache of the UE according to the AMAI; and if it is determined that a competition-based access mode is used, sending the data in the cache of the UE by using the competition-based resource informed by the base station. Corresponding to the aforementioned method, the present invention further discloses UE and an internal structure of the base station.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a User Equipment (UE) access method, a UE, and a base station in a cellular network.
Background
A conventional cellular network is a schedule-based system. In a conventional cellular network, when a UE has data to transmit, the UE needs to first transmit a scheduling request to a base station (eNB); after receiving the scheduling request, the eNB allocates uplink transmission resources to the UE and notifies the UE of the allocated resources through a dedicated control channel (PDCCH). The UE can transmit data after being notified of the resource allocation. The above-mentioned interactive procedure of sending scheduling request-allocating resource-notifying resource allocation result results in that the access delay of the UE in the scheduling-based system needs at least 11 ms and cannot be further reduced. Such a long access delay is desirable in conventional cellular networks. However, with the continuous emergence of new services, the problem that the access delay of the scheduling-based access mechanism is long and cannot be reduced will become more and more obvious. For example, from the service perspective, a cloud service in the future will be developed in large quantities, and the processing delay caused by the extra processing of the cloud and the increase of the transmission delay of data will cause the user to be more sensitive to the end-to-end delay. In this case, if the access delay of the UE in the cellular network can be reduced, the processing delay of the device and the transmission delay of the data can be compensated to a large extent. Therefore, how to reduce the access delay of the UE in the cellular network has become an important research topic at present.
Disclosure of Invention
The embodiment of the invention discloses a UE access method, UE and a base station, which aim to reduce the access time delay of the UE and improve the access performance of the UE.
The access method of the UE comprises the following steps: receiving access mode auxiliary information AMAI sent by a base station; receiving contention-based resources notified by a base station; and determining an access mode of the data in the self cache according to the AMAI, and if the access mode based on the competition is determined, transmitting the data in the self cache by using the resource based on the competition notified by the base station.
The above method further comprises: and the base station evaluates the performance of the current access mode configuration according to the quality of the received data, updates the contention-based resource and AMAI according to the evaluation result, and informs the UE of the updated contention-based resource and AMAI.
The AMAI comprises: the type of application and the conditions for selecting a contention-based access mode for this type of application. At this time, the contention based resources notified by the receiving base station include: receiving the type of the application informed by the base station and the contention-based resource allocated to the application.
Or the AMAI comprises: the type of application, the identity of the UE, and the access mode for a particular application type and a particular UE. At this time, the contention based resources notified by the receiving base station include: and receiving the type of the application, the UE identification and the contention-based resource allocated to the application type and the UE, which are notified by the base station.
The receiving of the access mode assistance information AMAI sent by the base station includes: and receiving the AMAI sent by the base station through a physical downlink control channel or a system message.
The access method of the UE according to another embodiment of the present invention includes: receiving an access mode of a local cell determined by a base station according to content information of UE in the cell; and determining the self access mode according to the access mode of the cell, and sending the data in the self cache according to the self access mode.
The above method further comprises: and the base station evaluates the performance of the access mode of the cell according to the quality of the received data, updates the access mode of the cell according to the evaluation result and informs the UE.
The access mode of the cell determined by the base station according to the content information of the UE in the cell comprises the following steps: when discovering that a new APP is accessed or receiving a new uplink data packet, the base station counts the instant content information of each UE to obtain the statistical information of the content information of each UE; the base station obtains the statistical information of the cell content information according to the statistical information of the content information of each UE; and the base station determines the access mode of the cell according to the statistical information of the cell content information.
Wherein, the base station determines the access mode of the cell according to the statistical information of the cell content information, and the method comprises the following steps:
calculating the quotient of the UE number N _ SB suitable for scheduling-based access and the UE number N _ CB suitable for contention-based access;
the quotient of the number of UEs N SB based on scheduled access and the number of UEs N CB adapted for contention based access is compared to a predetermined ratio threshold,
if the quotient of the UE number N _ SB based on scheduling access and the UE number N _ CB suitable for contention-based access is greater than or equal to a predetermined proportional threshold, determining that the access mode of the cell is the scheduling-based access mode;
otherwise, if the quotient of the UE number N _ SB based on the scheduling access and the UE number N _ CB suitable for the competition-based access is less than the predetermined ratio threshold, further judging whether delay sensitive service exists according to the service characteristic distribution of each UE,
if delay sensitive service exists, comparing the access delay when adopting the access mode based on scheduling and the access delay when adopting the access mode based on competition, if the access delay when adopting the access mode based on scheduling is smaller, adopting the access mode based on scheduling; if the access time delay is smaller when the access mode based on the competition is adopted, the access mode based on the competition is adopted;
if no delay sensitive service exists, comparing the expenses of adopting the access mode based on scheduling and adopting the access mode based on competition, if the expenses of adopting the access mode based on scheduling are smaller, adopting the access mode based on scheduling; if the overhead is small when the contention-based access mode is used, the contention-based access mode is used.
The UE described in the embodiment of the present invention includes:
the first receiving module is used for receiving the access mode auxiliary information AMAI sent by the base station;
a second receiving module for receiving contention-based resources notified by the base station; and
and the access mode confirmation module is used for determining the access mode of the data in the self cache according to the AMAI, and if the access mode based on the competition is determined to be adopted, the access mode confirmation module is used for sending the data in the self cache by utilizing the resources based on the competition notified by the base station.
The AMAI comprises: the type of application and the conditions for selecting a contention-based access mode for this type of application. At this time, the second receiving module is configured to receive the type of the application notified by the base station and the contention-based resource allocated to the application.
Or the AMAI comprises: the type of application, the identity of the UE, and the access mode for a particular application type and a particular UE. At this time, the second receiving module is configured to receive the type of the application, the UE identity, and contention-based resources allocated to the application type and the UE, which are notified by the base station.
The first receiving module receives the AMAI sent by the base station through a physical downlink control channel or a system message.
The UE according to another embodiment of the present invention includes:
a third receiving module, configured to receive an access mode of the cell, where the access mode is determined by the base station according to content information of the UE in the cell; and
and the second access mode confirmation module is used for determining the access mode of the cell according to the access mode of the cell and sending the data in the cache of the cell according to the access mode of the cell.
The base station according to an embodiment of the present invention includes:
a generation module for generating access mode assistance information AMAI;
a sending module for sending the generated AMAI to the UE in the cell; and
and a notification module for notifying the UE in the cell of the contention based resource.
Another embodiment of the present invention provides a base station, including:
an access mode determining module for determining the access mode of the cell according to the content information of the UE in the cell; and
and the second notification module is used for notifying the UE in the cell of the access mode of the cell.
It can be seen from the above-mentioned flows of the UE access method, the UE and the internal structure of the base station that, in the embodiment of the present invention, the base station may determine an access mode of a service according to the CI statistical information of the cell, the type of APP and the condition of the UE, so that the most suitable access mode may be selected according to the condition of the accessed service, and the advantages of the contention-based access mode and the scheduling-based access mode are effectively exerted at the same time.
Drawings
Fig. 1 is a flowchart of a UE access method according to an embodiment of the present invention;
fig. 2 is a flowchart of an access method of a UE when contention-based resources are CB resources reserved for a specific APP;
fig. 3 is a flowchart of an access method of a UE when contention based resources are CB resources reserved for a specific UE;
fig. 4 is a flowchart of an access method of a UE when contention-based resources are CB resources for a specific entire cell;
FIG. 5 is a method for a base station to determine an access mode of a cell according to CI information of UE in the cell;
fig. 6 is a schematic diagram of an internal structure of a UE according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an internal structure of a UE according to another embodiment of the present invention;
fig. 8 is a schematic internal structure diagram of a base station according to an embodiment of the present invention; and
fig. 9 is a schematic internal structure diagram of a base station according to another embodiment of the present invention.
Detailed Description
As mentioned above, with the emergence of new services, the end-to-end delay of the user for the new services will be more sensitive, so if the access delay of the UE can be reduced, the processing delay of the device and the transmission delay of data can be compensated to a great extent.
In addition, from the topology of the network, in the future, in order to expand the system capacity, more and more small cells (small cells) are added under the original macro base station. Under the topology, the number of UEs under the micro base station corresponding to each small cell is far smaller than that of the original macro base station. If a Contention Based (CB) UE access scheme is introduced at the micro base station side, the contention conflict problem is not obvious and the access delay of the UE is greatly reduced in many times. However, at certain times, such as when the number of UEs in a cell is large or the total traffic in a cell is large, the performance of the contention-based UE access scheme is not necessarily better than the scheduling-based UE access scheme. Generally, from the perspective of network environment, if the coverage area of a cell is small and the number of UEs in the cell is small, it is more suitable to adopt a contention-based UE access scheme; and if the coverage area of the cell is large and the number of UEs in the cell is large, it is more suitable to adopt the UE access scheme based on scheduling. From the perspective of service types, if the service of the UE is mostly a variable service, it is more suitable to adopt a contention-based UE access scheme; and if the service of the UE is mostly fixed service, the UE access scheme based on scheduling is more suitable to be adopted.
Based on the above considerations, the present invention proposes to introduce a contention-based UE access method in a small cell. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a flowchart of a UE access method according to an embodiment of the present invention. As shown in fig. 1, the access method for the UE in this embodiment mainly includes:
step 101: the UE receives Access Mode Assistance Information (AMAI) sent by the base station.
The AMAI is an implicit or explicit indication information to help the UE determine the transmission mode of the data in its own buffer, i.e. whether to transmit in a contention-based mode or to transmit after waiting for scheduling.
Step 102: the UE receives the contention-based resource notified by the base station.
Wherein the contention-based resource is a contention-based resource (CRSG) having a specific granularity. For example, the CRSG may be a CB resource reserved for a specific Application (APP), or may be a CB resource reserved for a specific UE.
In addition, in this step, the base station may explicitly or implicitly notify the UE of the determined contention based resource.
Step 103: and the UE determines the access mode of the data in the self cache according to the access mode auxiliary information, and if the access mode is determined to be the contention-based access mode, the data in the self cache is sent by using the reserved contention-based resources notified by the base station.
Still further the above method may further comprise: and the base station evaluates the performance of the current access mode configuration according to the quality of the received data, updates the contention-based resource and AMAI according to the evaluation result, and informs the UE of the updated contention-based resource and AMAI.
As mentioned above, the contention based resources may be CB resources reserved for a specific APP or CB resources reserved for a specific UE. The access method of the UE in different situations will be described in detail with reference to the drawings.
Fig. 2 is a flowchart of an access method of a UE when contention-based resources are CB resources reserved for a specific APP. As shown in fig. 2, the method mainly includes:
step 201: the base station generates AMAI and broadcasts to inform the UE; and the UE receives the AMAI sent by the base station.
Specifically, in this step, the AMAI may be generated by:
method 1, explicitly indicated AMAI:
for a specific APP, the base station determines which mode generates a smaller access delay (or system control overhead) under two different access modes. Specifically, the access delay (or system control overhead) when the scheduling-based access mode is adopted and the contention-based access mode is adopted is compared for a specific APP, and if the access delay (or system control overhead) when the scheduling-based access mode is adopted is smaller, the scheduling-based access mode is adopted; the contention-based access mode is employed if the access delay (or system control overhead) is small when the contention-based access mode is employed. The base station may then inform the UE of the determined access mode.
It should be noted that, in the above method, it is necessary to estimate the access delay when the scheduling-based access mode and the contention-based access mode are used.
Wherein, the access time delay when adopting the access mode based on scheduling is about 50ms in the idle state, and is about 10ms if no data packet exists in the buffer in the connection state; if there are packets in the buffer, it is about 5 ms.
The access delay in the contention-based access mode can be calculated by the following formula (1) or (2):
wherein d isiRepresents the access delay when a contention-based access mode is employed; p represents the size of the Maximum Transmission Unit (MTU); c represents a service rate (serving rate); omegaiAn average value representing a packet size distribution of an ith user equipment UEi;a second order distance value representing a packet size distribution of the UEi; ρ represents the utilization; lambda [ alpha ]lThe arrival rate of the data packets at the buffer representing the UEi, and N represents the number of UEs.
The overhead when using the scheduling-based access mode can be calculated by the following equation (3):
wherein,CWmaxis the maximum value of the contention window; data _ slots is the time required to transmit a packet, and once the size of the packet and the rate at which the packet is transmitted (determined by the code modulation scheme) are known, the time to transmit the packet is known.
The overhead when using the contention-based access mode can be calculated by the following equation (4):
the PDCCH for uplink grant represents a resource occupied by sending an uplink grant (uplink grant) in the PDCCH. If we assume that the uplink and downlink traffic in a cell is 1:1, we can consider that the resource occupied by the PDCCH uplink grant is half of the resource occupied by the whole PDCCH. The resources occupied by PDCCH depend on the Control Format Index (CFI), and once the CFI is determined, the resources occupied by it are determined. The PUCCH for SR represents a resource occupied by transmission of a scheduling request in the PUCCH channel. The PUSCH represents a data channel resource occupied by transmission data.
The above-mentioned explicit notification has the advantages of simple indication and relatively low signaling overhead, and is suitable for the service with relatively small traffic. Because when the traffic is small, di(i =1, 2.. N) outperforms the scheduling-based access delay with a high probability. However, for the traffic with large traffic volume, such general explicit indication does not allow all users in the system to obtain the optimal performance. Because d may be caused as the number of users adopting the CB mechanism increasesi(i =1, 2.. N) performance lags behind scheduling-based access latency.
Method 2, implicitly indicated AMAI:
the implicit indication may be the probability P that the UE will adopt a contention-based access mode when sending a particular APPCBOther indicators are also possible. In the following, the probability that the UE adopts the contention-based access mode is taken as an example.
Obtaining PCBThe direct method of (2) is obtained by exhaustive search. I.e. the number of users N using the contention-based access mode is increased stepwiseCBThen with NCBInstead of N in the above formula (1), a specific N is calculatedCBD at the bottomi. When d is foundiAlready greater than the schedule-based access-time delay, the increase is stopped. Then P is obtained by the following formula (5)CB。
Wherein N is the total number of users.
In this embodiment, the base station may notify the UE of the AMAI through a Physical Downlink Control Channel (PDCCH) or a new channel, or the base station may broadcast the AMAI in a system message (SIB) form.
In this embodiment, the AMAI will include at least the following two pieces of information: the type of application (e.g., classification of the application, QoS class identification, QCI, etc.) and the conditions under which the contention-based access mode is selected for this application type (e.g., probability of selecting contention-based access).
For example, in one embodiment of the invention, AMAI may select a probability of 1/16 based on the contention access mode for application class a as shown in table 1 below.
| Type of application | Selecting probability based on contention access mode |
| Application classification A (e.g., instant messaging and M2M services) | { 0001 } (probability based on contention transmission 1/16) |
TABLE 1
In table 1 above, the probability of selecting the contention-based access mode may be represented by a binary value represented by 4 bits, e.g., { 0001 } for 1/16, { 0010 } for 1/8, { 0011 } for 3/16, … …, { 1111 } for 1. In this example, after determining that the probability of selecting a contention-based access mode for application class a (e.g., instant messaging and M2M traffic) is 1/16, the base station will transmit AMAI information as shown in table 1 to the UE through a PDCCH, SIB or a new channel. Thus, after receiving the AMAI information, the UE can know that 1/16 probability is used for the service classified as a for the application to transmit in the contention-based access mode.
It is noted that a specific APP, as referred to herein, is generally referred to as Variable Bit Rate (VBR) traffic. Because fixed bit rate (CBR) services may employ semi-persistent scheduling (SPS) with negligible access latency under their scheduling, such services do not necessarily employ contention-based access mode access.
Step 202: the base station reserves contention-based resources for applications suitable for adopting a contention-based access mode and notifies the UE; the UE receives the contention-based resource notified by the base station.
In this step, the content of the notification will contain at least the following two pieces of information: the type of application (e.g., class of application, QoS class identification, QCI, etc.) and the contention-based resources, i.e., CB resources, allocated for the application type. For example, the base station may inform the UE of the CB resources reserved for the application type suitable for employing contention based transmission through a first message as shown in table 2 below. As shown in table 2, for application class a, reserved CB resources are allocated in units of Resource Blocks (RBs).
TABLE 2
Specifically, in table 2 above, the RB allocation period refers to a period obtained when RB is allocated, for example, n4, n8, n16, n32. Wherein, when the RB allocation period is n4, it means that every 4 RBs are one allocation period; when the RB allocation period is n8, it means that every 8 RBs is one allocation period; when the RB allocation period is n16, it means that every 16 RBs is one allocation period; when the RB allocation period is n32, it means that every 32 RBs is one allocation period; … … are provided. The RB allocation indication identifies which RBs are reserved CB resources and which RBs are scheduling-based resources, i.e., SB resources, in one RB allocation period, for example, the corresponding RB with identification bit 1 is reserved CB resources, and the corresponding RB with identification bit 0 is SB resources. Taking 20M bandwidth (100 RB) as an example, when the RB allocation period is n8, it means that each 8 RBs is one allocation period. In one allocation period, an RB reserved for contention resources is indicated by an RB allocation indication (bitmap) of 8 bits. If bitmap indicates 01101100, it means that 2 nd, 3 rd, 5 th and 6 th RBs are reserved CB resources.
Step 203: the UE determines whether the data in the cache of the UE adopts a competition-based access mode according to the AMAI, and if so, the UE sends the data in the cache of the UE on a competition-based resource reserved for the application corresponding to the data; otherwise, sending the data in the self buffer memory by adopting an access mode based on scheduling.
Further, the base station evaluates the performance of such access mode configuration according to the quality of the received data, updates the settings and the reserved resources suitable for employing the contention-based access mode according to the evaluation result, and notifies the UE.
In the above embodiment, after the base station notifies the UE of the AMAI and the resources reserved for the APP that is suitable for using the contention based access mode, the UE may determine the access mode of the data in its own cache according to the AMAI, that is, if the contention based access mode is used, the data is sent on the CB resources reserved for the application corresponding to the data, otherwise, the data is sent using the scheduling based access mode, thereby realizing the selection of the access mode based on the APP.
Fig. 3 shows a flowchart of an access method of a UE when contention based resources are CB resources reserved for a specific UE. As shown in fig. 3, the method mainly includes:
step 301: the base station generates AMAI and informs the UE; and the UE receives the AMAI sent by the base station.
Specifically, in this step, the AMAI may be generated by the following method.
Explicit indication is a better approach because it is based on the AMAI of a particular UE. This is because AMAI is a special indication for a particular UE by the base station, and is already very flexible in itself; another aspect is because explicit indication signaling is simpler.
Taking the access delay determination criterion as an example, it is first determined which mode generates a small overall access delay under two different access modes. And informing the mode with small overall access delay as the finally adopted mode. The overall access delay here needs to consider the access delay d of all APPs operated by a specific UEAPPi. For example, one user runs two CBR services and one VBR service, because the CBR service may employ SPS, whose scheduling-based access delay is negligible. Even if the CB-based access delay (obtained from the above equation (1) or (2)) is smaller than the scheduling-based access delay, the VBR service can still notify the UE to adopt the scheduling-based mode. How to take overall consideration into consideration depends on the operator's own policy, such as minimum average delay of each APP, minimum weighted average, minimum priority service access delay, and so on. Are not listed individually here.
As described above, the base station may notify the UE of the AMAI through the PDCCH or a new channel, and the base station may also broadcast the AMAI in the form of an SIB.
In this embodiment, the AMAI will include at least the following three pieces of information: the type of application (e.g., class of application, QoS class identification, QCI, etc.), the identity of the UE, and the access mode for a particular application type and a particular UE.
For example, in one embodiment of the invention, the AMAI may be as shown in Table 3 below.
TABLE 3
In this example, access mode 0 indicates that for application class a (e.g., instant messaging and M2M traffic) and a certain UE identity, a contention-based access mode may be employed; access mode 1 indicates that for application class a (e.g. instant messaging and M2M traffic) and a certain UE identity, a scheduling based access mode may be employed.
Step 302: the base station reserves contention-based resources for the UE suitable for adopting the contention-based access mode and informs the UE; the UE receives the contention-based resource notified by the base station.
In this step, the content of the notification will contain at least the following three pieces of information: the type of application (e.g., class of application, QoS class identification, QCI, etc.), UE identification, and the allocated contention-based resources, i.e., CB resources. For example, the base station may inform the UE of the CB resources reserved for the UE adapted to employ the contention based access mode through a fourth message as shown in table 4 below. In table 4, the allocated resources are in units of RBs.
TABLE 4
As previously described, the RB allocation period may be, for example, n4, n8, n16, n32. Also taking 20M bandwidth (100 RB) as an example, when the RB allocation period is n8, it means that every 8 RBs is one allocation period. In one allocation period, an RB reserved for contention resources is indicated by an RB allocation indication (bitmap) of 8 bits. If bitmap indicates 01101100, it means that 2 nd, 3 rd, 5 th and 6 th RBs are reserved CB resources.
Step 303: the UE determines whether the data in the cache of the UE adopts a competition-based access mode according to the AMAI, and if so, the data in the cache of the UE is sent on a competition-based resource reserved for the UE; otherwise, sending the data in the self buffer memory through the access mode based on the scheduling.
Further, the base station evaluates the performance of such access mode settings according to the received data quality, updates the settings and the reserved resources appropriate for the application type using the contention-based access mechanism according to the evaluation result, and notifies the UE.
In the above embodiment, after the base station notifies each UE AMAI and the resource reserved for the APP based on the contention access mode to the UE, the UE may determine the access mode of the data in its own cache according to the AMAI, that is, if the contention-based access mode is adopted, the data is sent on the CB resource reserved for the application corresponding to the data, otherwise, the data is sent by the scheduling-based access mode, thereby realizing the selection of the access mode based on the APP and the UE.
The above embodiments describe in detail the access method of the UE when the contention based resource is a CB resource reserved for a specific APP or a CB resource reserved for a specific UE. In practical applications, the base station may also determine the access modes of all UEs in the whole cell according to the Content Information (CI) of the UEs in the cell. At this time, the contention based resource is a CB resource for a specific entire cell.
Fig. 4 is a flowchart of an access method of a UE when contention based resources are CB resources for a specific entire cell. As shown in fig. 4, the method mainly includes:
step 401: the base station determines the access mode of the cell according to the CI information of the UE in the cell and informs the UE; and the UE receives the access mode of the cell sent by the base station.
As described above, the base station may inform the UE of the access mode of the own cell through a main system information block (MIB), SIB (system information block), or a new channel on a Physical Broadcast Control Channel (PBCCH).
Step 402: and the UE determines the self access mode according to the access mode of the cell and sends the data in the self cache according to the self access mode.
The access mode of the UE is the same as that of the cell in which the UE is located, for example, if the access mode of the cell in which the UE is located is a contention-based access mode, the UE also adopts the contention-based access mode; if the access mode of the cell in which the UE is located is the scheduling-based access mode, the UE will also adopt the scheduling-based access mode.
Furthermore, the base station updates the access mode of the cell according to the received service quality and the transmission performance of the service and the evaluation result, and informs the UE.
The method for determining the access mode of the cell by the base station according to the CI information of the UEs in the cell will be described in detail below with reference to the accompanying drawings. As shown in fig. 5, the method for the base station to determine the access mode of the cell according to the CI information of the UE in the cell includes the following steps:
step 501: when discovering that a new APP is accessed or receiving a new uplink data packet, the base station counts the instant content information of each UE to obtain the statistical information of the content information of each UE.
The instant content information of the UE may include: source IP address, APP type, APP related information, packet interval, packet size, etc. The statistical information of the UE content information includes: a source IP address, service characteristic distribution of each APP of the UE, cache clearing time and the like.
Step 502: and obtaining the statistical information of the cell content information according to the statistical information of the content information of each UE.
The statistical information of the cell content information includes: total number of UEs, total traffic, traffic characteristics distribution per UE, number of UEs suitable for contention-based access, number of UEs suitable for scheduling-based access, and the like.
Specifically, in this step, the number of UEs suitable for contention-based access and the number of UEs suitable for scheduling-based access may be determined by:
firstly, initializing the number N _ CB of UE suitable for contention-based access and the number N _ SB of UE suitable for scheduling-based access, namely setting the initial values of two variables N _ CB and N _ SB to be 0;
the following determination may be performed for each UE: if Var _ Interval of a UE is greater than Interval _ threshold or Var _ Size is greater than Size _ threshold, adding 1 to the number of UEs N _ CB suitable for contention based access; otherwise, the number of UEs eligible for scheduling-based access N _ SB is increased by 1. Where, Var _ Interval is a variance value of packet arrival Interval, and Var _ size is a variance value of packet size; the Interval _ threshold and the Size _ threshold are respectively a preset packet arrival Interval threshold and a data packet Size threshold, and are used for determining whether the arrival Interval of the data packet and the Size of the data packet are stable.
Step 503: and determining the access mode of the cell according to the statistical information of the cell content information.
Specifically, in this step, the access mode of the cell may be determined by the following method:
firstly, calculating the quotient of the UE number N _ SB suitable for scheduling access and the UE number N _ CB suitable for contention access;
the quotient of the number of UEs N SB based on scheduled access and the number of UEs N CB adapted for contention based access is compared to a predetermined ratio threshold,
if the quotient of the UE number N _ SB based on scheduling access and the UE number N _ CB suitable for contention-based access is greater than or equal to a predetermined proportional threshold, determining that the access mode of the cell is the scheduling-based access mode;
otherwise, if the quotient of the UE number N _ SB based on the scheduling access and the UE number N _ CB suitable for the competition-based access is less than the predetermined ratio threshold, further judging whether delay sensitive service exists according to the service characteristic distribution of each UE,
if delay sensitive service exists, judging which mode generates small average access delay under two different access modes, and taking the mode with small average access delay as a final cell access mode. Specifically, in this step, the access delays when the scheduling-based access mode is adopted and the contention-based access mode is adopted are compared, and if the access delay when the scheduling-based access mode is adopted is smaller, the scheduling-based access mode is adopted; and if the access time delay is smaller when the access mode based on the competition is adopted, adopting the access mode based on the competition.
If no delay sensitive service exists, comparing the expenses of adopting the access mode based on scheduling and adopting the access mode based on competition, if the expenses of adopting the access mode based on scheduling are smaller, adopting the access mode based on scheduling; if the overhead is small when the contention-based access mode is used, the contention-based access mode is used.
In the above method, it is necessary to estimate the access delay when the scheduling-based access mode and the contention-based access mode are used, and to estimate the overhead when the scheduling-based access mode and the contention-based access mode are used.
As described above, the access delay in the scheduling-based access mode is about 50ms in the idle state, and about 10ms if there is no data packet in the buffer in the connection state; if there are packets in the buffer, it is about 5 ms.
The access delay when the contention based access mode is adopted can be calculated by the above formula (1) or (2).
The overhead when using the scheduling-based access mode can be calculated by the following equation (3).
The overhead when using the contention-based access mode can be calculated by the following equation (4).
In the above embodiment, the base station may determine the access mode of the cell according to the CI statistical information of the cell, that is, the base station may select the most suitable access mode according to its own condition while determining the access mode of the cell, considering the number of UEs, the traffic volume, the traffic characteristics on the UEs, and other factors, and effectively and simultaneously exert the advantages of the contention-based access mode and the scheduling-based access mode.
Corresponding to the UE access method, the embodiment of the invention also discloses the internal structure of the UE.
According to an embodiment of the present invention, the internal structure of the UE is shown in fig. 6, and may include:
the first receiving module is used for receiving the access mode auxiliary information AMAI sent by the base station;
a second receiving module for receiving contention-based resources notified by the base station; and
and the access mode confirmation module is used for determining the access mode of the data in the self cache according to the AMAI, and if the access mode based on the competition is determined to be adopted, the access mode confirmation module is used for sending the data in the self cache by utilizing the resources based on the competition notified by the base station.
As described above, the AMAI includes: the type of application and the conditions for selecting a contention-based access mode for this type of application. At this time, the second receiving module is configured to receive the type of the application notified by the base station and the contention-based resource allocated to the application.
Or the AMAI comprises: the type of application, the identity of the UE, and the access mode for a particular application type and a particular UE. At this time, the second receiving module is configured to receive the type of the application, the UE identity, and contention-based resources allocated to the application type and the UE, which are notified by the base station.
The first receiving module receives the AMAI sent by the base station through a physical downlink control channel or a system message.
According to another embodiment of the present invention, the internal structure of the UE is shown in fig. 7, and may include:
a third receiving module, configured to receive an access mode of the cell, where the access mode is determined by the base station according to content information of the UE in the cell; and
and the second access mode confirmation module is used for determining the access mode of the cell according to the access mode of the cell and sending the data in the cache of the cell according to the access mode of the cell.
In addition, the embodiment of the present invention also discloses an internal structure of a base station, as shown in fig. 8, including:
a generation module for generating access mode assistance information AMAI;
a sending module for sending the generated AMAI to the UE in the cell; and
and a notification module for notifying the UE in the cell of the contention based resource.
Wherein the generation module may generate the AMAI through the AMAI generation method as described above.
According to another embodiment of the present invention, as shown in fig. 9, the internal structure of the base station may include:
an access mode determining module for determining the access mode of the cell according to the content information of the UE in the cell; and
and the second notification module is used for notifying the UE in the cell of the access mode of the cell.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (18)
1. An access method of a User Equipment (UE), comprising:
receiving access mode auxiliary information AMAI sent by a base station;
receiving contention-based resources notified by a base station;
and determining an access mode of the data in the self cache according to the AMAI, and if the access mode based on the competition is determined, transmitting the data in the self cache by using the resource based on the competition notified by the base station.
2. The method of claim 1, further comprising: and the base station evaluates the performance of the current access mode configuration according to the quality of the received data, updates the contention-based resource and AMAI according to the evaluation result, and informs the UE of the updated contention-based resource and AMAI.
3. The method of claim 1, wherein the AMAI comprises: the type of application and the conditions for selecting a contention-based access mode for this type of application.
4. The method of claim 1, wherein receiving contention-based resources advertised by a base station comprises: receiving the type of the application informed by the base station and the contention-based resource allocated to the application.
5. The method of claim 1, wherein the AMAI comprises: the type of application, the identity of the UE, and the access mode for a particular application type and a particular UE.
6. The method of claim 1, wherein receiving contention-based resources advertised by a base station comprises: and receiving the type of the application, the UE identification and the contention-based resource allocated to the application type and the UE, which are notified by the base station.
7. The method of claim 1, wherein receiving the Access Mode Assistance Information (AMAI) transmitted by the base station comprises: and receiving the AMAI sent by the base station through a physical downlink control channel or a system message.
8. An access method of a User Equipment (UE), comprising:
receiving an access mode of a local cell determined by a base station according to content information of UE in the cell;
and determining the self access mode according to the access mode of the cell, and sending the data in the self cache according to the self access mode.
9. The method of claim 8, further comprising: and the base station evaluates the performance of the access mode of the cell according to the quality of the received data, updates the access mode of the cell according to the evaluation result and informs the UE.
10. The method of claim 8, wherein the access mode of the local cell determined by the base station according to the content information of the UEs in the cell comprises:
when discovering that a new APP is accessed or receiving a new uplink data packet, the base station counts the instant content information of each UE to obtain the statistical information of the content information of each UE;
the base station obtains the statistical information of the cell content information according to the statistical information of the content information of each UE; and
and the base station determines the access mode of the cell according to the statistical information of the cell content information.
11. The method of claim 10, wherein the base station determining the access mode of the cell according to the statistical information of the cell content information comprises:
calculating the quotient of the UE number N _ SB suitable for scheduling-based access and the UE number N _ CB suitable for contention-based access;
the quotient of the number of UEs N SB based on scheduled access and the number of UEs N CB adapted for contention based access is compared to a predetermined ratio threshold,
if the quotient of the UE number N _ SB based on scheduling access and the UE number N _ CB suitable for contention-based access is greater than or equal to a predetermined proportional threshold, determining that the access mode of the cell is the scheduling-based access mode;
otherwise, if the quotient of the UE number N _ SB based on the scheduling access and the UE number N _ CB suitable for the competition-based access is less than the predetermined ratio threshold, further judging whether delay sensitive service exists according to the service characteristic distribution of each UE,
if delay sensitive service exists, comparing the access delay when adopting the access mode based on scheduling and the access delay when adopting the access mode based on competition, if the access delay when adopting the access mode based on scheduling is smaller, adopting the access mode based on scheduling; if the access time delay is smaller when the access mode based on the competition is adopted, the access mode based on the competition is adopted;
if no delay sensitive service exists, comparing the expenses of adopting the access mode based on scheduling and adopting the access mode based on competition, if the expenses of adopting the access mode based on scheduling are smaller, adopting the access mode based on scheduling; if the overhead is small when the contention-based access mode is used, the contention-based access mode is used.
12. A User Equipment (UE), comprising:
the first receiving module is used for receiving the access mode auxiliary information AMAI sent by the base station;
a second receiving module for receiving contention-based resources notified by the base station; and
and the access mode confirmation module is used for determining the access mode of the data in the self cache according to the AMAI, and if the access mode based on the competition is determined to be adopted, the access mode confirmation module is used for sending the data in the self cache by utilizing the resources based on the competition notified by the base station.
13. The UE of claim 12, wherein the AMAI comprises: the type of application and the conditions for selecting a contention-based access mode for this application type;
the second receiving module is used for receiving the type of the application notified by the base station and the contention-based resource allocated to the application.
14. The UE of claim 12, wherein the AMAI comprises: the type of application, the identity of the UE, and the access mode for a particular application type and a particular UE;
the second receiving module is used for receiving the type of the application, the UE identification and the contention-based resource distributed to the application type and the UE, which are notified by the base station.
15. The UE of claim 12, wherein the first receiving module receives the AMAI transmitted by the base station through a physical downlink control channel or a system message.
16. A User Equipment (UE), comprising:
a third receiving module, configured to receive an access mode of the cell, where the access mode is determined by the base station according to content information of the UE in the cell; and
and the second access mode confirmation module is used for determining the access mode of the cell according to the access mode of the cell and sending the data in the cache of the cell according to the access mode of the cell.
17. A base station, comprising:
a generation module for generating access mode assistance information AMAI;
a sending module for sending the generated AMAI to the UE in the cell; and
and a notification module for notifying the UE in the cell of the contention based resource.
18. A base station, comprising:
an access mode determining module for determining the access mode of the cell according to the content information of the UE in the cell; and
and the second notification module is used for notifying the UE in the cell of the access mode of the cell.
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| CN201310545572.3A CN104640229A (en) | 2013-11-06 | 2013-11-06 | UE accessing method, UE and base station |
| JP2014223100A JP2015091133A (en) | 2013-11-06 | 2014-10-31 | Access method for user equipment, user equipment, and base station |
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| CN201310545572.3A CN104640229A (en) | 2013-11-06 | 2013-11-06 | UE accessing method, UE and base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016206601A1 (en) * | 2015-06-23 | 2016-12-29 | 中兴通讯股份有限公司 | Method and device for competitive transmission |
| CN110062477A (en) * | 2015-12-25 | 2019-07-26 | 华为技术有限公司 | A kind of cut-in method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3139679A1 (en) * | 2015-09-03 | 2017-03-08 | Alcatel Lucent | Method to operate a user equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101500306A (en) * | 2008-01-28 | 2009-08-05 | 大唐移动通信设备有限公司 | Paging method, system, kernel network, base station and user equipment |
| CN102088775A (en) * | 2009-12-08 | 2011-06-08 | 大唐移动通信设备有限公司 | Method, system and device for distributing contention resources |
| CN201869369U (en) * | 2009-04-23 | 2011-06-15 | 交互数字专利控股公司 | Base station and wireless transmitting/receiving unit |
| CN102217345A (en) * | 2011-05-09 | 2011-10-12 | 华为技术有限公司 | Method and apparatus for network access |
| US9807795B2 (en) * | 2010-04-06 | 2017-10-31 | Samsung Electronics Co., Ltd. | Method and device for reverse transmission in a mobile communication system |
-
2013
- 2013-11-06 CN CN201310545572.3A patent/CN104640229A/en active Pending
-
2014
- 2014-10-31 JP JP2014223100A patent/JP2015091133A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101500306A (en) * | 2008-01-28 | 2009-08-05 | 大唐移动通信设备有限公司 | Paging method, system, kernel network, base station and user equipment |
| CN201869369U (en) * | 2009-04-23 | 2011-06-15 | 交互数字专利控股公司 | Base station and wireless transmitting/receiving unit |
| CN102088775A (en) * | 2009-12-08 | 2011-06-08 | 大唐移动通信设备有限公司 | Method, system and device for distributing contention resources |
| US9807795B2 (en) * | 2010-04-06 | 2017-10-31 | Samsung Electronics Co., Ltd. | Method and device for reverse transmission in a mobile communication system |
| CN102217345A (en) * | 2011-05-09 | 2011-10-12 | 华为技术有限公司 | Method and apparatus for network access |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016206601A1 (en) * | 2015-06-23 | 2016-12-29 | 中兴通讯股份有限公司 | Method and device for competitive transmission |
| US10674538B2 (en) | 2015-06-23 | 2020-06-02 | Zte Corporation | Method and device for competitive transmission |
| CN110062477A (en) * | 2015-12-25 | 2019-07-26 | 华为技术有限公司 | A kind of cut-in method and device |
| US11317439B2 (en) | 2015-12-25 | 2022-04-26 | Huawei Technologies Co., Ltd. | Access method and apparatus |
| US11324044B2 (en) | 2015-12-25 | 2022-05-03 | Huawei Technologies Co., Ltd. | Access method and apparatus |
| US11711850B2 (en) | 2015-12-25 | 2023-07-25 | Huawei Technologies Co., Ltd. | Access method and apparatus |
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