CN106034343B

CN106034343B - Access method and device

Info

Publication number: CN106034343B
Application number: CN201510104629.5A
Authority: CN
Inventors: 贺媛; 刘佳敏
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-03-10
Filing date: 2015-03-10
Publication date: 2020-02-18
Anticipated expiration: 2035-03-10
Also published as: CN106034343A

Abstract

The invention relates to the technical field of communication, in particular to an access method and an access device, which are used for solving the problem that the access requirements of flexibly deployed small stations in a UDN (user data network) can not be met by pre-configuring a donor node for the small stations and configuring the donor node through OAM (operation administration and maintenance). The access method provided by the embodiment of the invention comprises the following steps: a first node sends an access request message to at least one selected second node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node; and the first node determines a node which can be used as a Donor Donor node of the first node in the at least one second node according to the received access response message of the second node. By adopting the embodiment of the invention, the donor node providing the backhaul service can be flexibly and conveniently selected for the plug-and-play access point, and the configuration and maintenance work of the network side is saved by configuring the donor cell list for the access point without OAM.

Description

Access method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an access method and an access device.

Background

In an existing enhanced Long Term Evolution-Advanced (LTE-a) system, a Relay (Relay) technology is introduced, and is mainly used for improving throughput at a cell edge, expanding network coverage, providing group mobile services, and the like.

The Relay Node (RN) is wirelessly connected to the donor Node and is connected to the core network via the donor Node. The radio link between the RN and the donor node is called a Backhaul link (Backhaul link), and the radio links between the donor node and its serving UEs and between the RN and its serving UEs are called Access links (Access links). In an LTE-a system, the donor node of the RN is a macro base station (DeNB). A single hop is arranged between the RN and the macro base station, and only one macro base station serving one RN at the same time can be provided.

Fig. 1 is a schematic diagram of a network architecture after the RN accesses the network. The radio interface between the UE and the RN is defined as a Uu port, and the radio interface between the RN and the DeNB is defined as a Un port. The RN has two roles of UE and base station, and the RN performs signaling and data interaction with the DeNB on a Un port and serves the UE on a Uu port. When the RN is powered on, a donor cell (i.e., a donor node) is selected, and since not all macro cells can serve the RN, the cell selection of the RN and the cell selection of the UE are usually different.

At present, a network side determines a donor node for an RN in a manner of pre-configuration or Operation Administration and Maintenance (OAM) entity configuration. In the pre-configuration mode, before the RN is started, an operator pre-configures accessible cell information for the RN, and the information is stored in the RN. When the RN is started up to search the cell, only performing cell selection in a pre-configured cell set, and selecting the cell with the best signal quality as a donor cell; in the OAM configuration mode, the RN is used as a user terminal to access the selected cell after being started, and after the network side identifies that the RN is the RN, donor cell information is configured for the RN through the OAM. And after obtaining the donor cell information, the RN accesses the selected donor cell, and the donor cell provides backhaul service for the selected donor cell.

In the future development of mobile communication systems, in order to better meet user requirements and improve network capacity and throughput, more low-power small-coverage access nodes (hereinafter referred to as small stations) must be introduced, that is, ultra-dense networking (UDN) in the future. In the UDN, networking is flexible and changeable, for example, in distributed networking or hybrid networking, Access Points (APs) are flexibly deployed, and are usually plug and play, and cannot be preconfigured by an operator; the number of nodes in UDN is large, and the donor cell list to be configured by OAM may be very large, which makes the configuration and maintenance work very difficult.

In summary, the current methods of pre-configuring a donor node for a cell and configuring the donor node through OAM cannot meet the access requirement of flexibly deployed cells in UDN.

Disclosure of Invention

The embodiment of the invention provides an access method and device, which are used for solving the problem that the access requirements of flexibly deployed small stations in a UDN (user data network) cannot be met by pre-configuring a donor node for the small stations and configuring the donor node through OAM (operation administration and maintenance).

An access method provided by an embodiment of the present invention includes:

a first node sends an access request message to at least one selected second node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node;

and the first node determines a node which can be used as a Donor Donor node of the first node in the at least one second node according to the received access response message of the second node.

Optionally, the first node selects the at least one second node according to the following steps:

carrying out neighbor cell measurement; selecting the at least one second node according to the neighbor cell measurement result; or,

receiving backhaul information sent by at least one neighboring node; selecting the at least one second node according to the received backhaul information; or,

carrying out neighbor cell measurement and receiving backhaul information sent by at least one neighbor cell node; and selecting the at least one second node according to the neighbor cell measurement result and the received backhaul information.

Optionally, the first node receives backhaul information sent by any neighboring node according to the following steps:

after accessing the neighboring node, receiving backhaul information sent by the neighboring node through a Radio Resource Control (RRC) message; or,

and receiving a broadcast message which is sent by the adjacent cell node and carries the backhaul information.

Optionally, after the first node determines a node capable of being a Donor node of the first node, the method further includes:

and the first node determines own backhaul information based on the determined access response message of the Donor node so as to provide backhaul links for other nodes.

Optionally, the backhaul information of any node includes one or more of the following information:

backhaul level information indicating a number of hops of a backhaul link experienced by data transmitted via the node;

backhaul level information indicating a composite characteristic of one or more of backhaul link attributes, latency, throughput; the return link attributes comprise a wired return link, a wireless return link and a return link with special microwave;

time delay information;

throughput information.

Optionally, the access request message includes one or more of the following information:

frequency points and/or bandwidths supported by the first node;

backhaul demand information of the first node; the backhaul demand information comprises demand information for latency and/or throughput;

a neighbor measurement result of the first node.

Optionally, the method further comprises:

if the first node determines that the second node sending the access response message rejects the Donor Donor node as the first node according to the received access response message of the second node, or the throughput of the backhaul service which can be provided by the second node which does not reject the Donor Donor node as the first node does not meet the requirement of the first node, the first node determines that the second node sending the access response message rejects the Donor Donor node as the first node, and then the first node determines that the throughput of the backhaul service which can be provided by the second node which does not reject the Donor Don

And after the first node passes through the preset time length, reselecting at least one second node, and sending an access request message to the reselected at least one second node.

Optionally, the determining, by the first node, a node that can serve as a Donor node of the first node in the at least one second node according to the received access response message of the second node, includes:

the first node judges whether a second node can meet the backhaul requirement of the first node according to the received access response message of the second node, wherein the backhaul requirement comprises the requirement on throughput; if so, selecting the second node as a Donor Donor node of the first node; otherwise, if a plurality of second nodes do not reject the Donor Donor node as the first node and the sum of the throughputs of the backhaul services that the plurality of second nodes can provide meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

Optionally, the sending, by the first node, the access request message to the selected at least one second node includes:

the first node sends an access request message to a plurality of selected second nodes; the sum of the throughputs of the backhaul services requested by the first node to the second nodes can meet the throughput requirement of the first node.

Optionally, after the first node determines a node that can be a Donor node of the first node in the at least one second node, the method further includes:

and the first node sends an access confirmation message to the determined Donor node, wherein the access confirmation message is used for indicating that the Donor node confirms that the first node provides backhaul service.

Another embodiment of the present invention provides an access method, including:

a second node receives an access request message sent by a first node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node;

and the second node judges whether the second node can be used as a Donor node of the first node or not, and sends an access response message to the first node based on the judgment result.

Optionally, before the second node receives the access request message sent by the first node, the method further includes:

notifying the first node of the backhaul information of the second node through a Radio Resource Control (RRC) message or a broadcast message; the backhaul information is used for the first node to select a node to send an access request message.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the determining, by the second node, whether the second node can serve as a Donor node of the first node includes:

the second node judges whether the second node can be used as a Donor node of the first node or not based on the access request message and one or more of the following information:

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

Optionally, if the second node can only provide a part of the throughput requested by the first node, the access response message includes information of the part of the throughput that the second node can provide.

Optionally, if the second node can only provide a part of the throughput requested by the first node, the method further includes:

and the second node sends a program capacity expansion request message back to at least one third node based on the throughput requested by the first node and the partial throughput which can be provided by the second node at present, and the program capacity expansion request message is used for requesting the third node to increase the throughput of the backhaul service.

Optionally, the sending, by the second node, a ranging request message back to the at least one third node includes:

the second node sends back a program expansion request message to a third node of a Donor node as the second node; and/or the presence of a gas in the gas,

the second node sends an access request message to a selected non-accessed third node, and the access request message is used for requesting the selected third node to serve as a Donor node of the second node and providing backhaul service for the second node; the access request message comprises the requirement information of the second node on the throughput of the backhaul service.

Optionally, after the second node sends the access response message to the first node, the method further includes:

and after receiving the access confirmation message sent by the first node, the second node confirms the Donor node which needs to be used as the first node, and provides backhaul service for the first node.

An embodiment of the present invention provides an access apparatus, including:

a transceiver module, configured to send an access request message to at least one selected second node, where the access request message is used to request the second node to serve as a Donor node of a first node, and provide backhaul service for the first node;

a determining module, configured to determine, according to the received access response message of the second node, a node that can serve as a Donor Donor node of the first node in the at least one second node.

Another embodiment of the present invention provides an access apparatus, including:

a receiving module, configured to receive an access request message sent by a first node, where the access request message is used to request a second node to serve as a Donor Donor node of the first node, and provide a backhaul service for the first node;

a judging module, configured to judge whether the second node can serve as a Donor node of the first node;

and the sending module is used for sending an access response message to the first node based on the judgment result of the judging module.

By adopting the embodiment of the invention, the first node can initiate the access request message to the at least one second node which is selected autonomously, and the donor node which provides the backhaul service for the donor node is determined finally based on the received access response message fed back by the at least one second node. By adopting the mode, the donor node providing the backhaul service can be flexibly and conveniently selected for the plug-and-play access point, and the OAM is not needed to configure the donor cell list for the access point, so that the configuration and maintenance work of the network side is saved.

Drawings

Fig. 1 is a schematic diagram of a network architecture after an RN accesses a network;

fig. 2 is a flowchart of an access method according to an embodiment of the present invention;

fig. 3 is a flowchart of an access method according to a second embodiment of the present invention;

fig. 4 is a schematic diagram of backhaul link access of a small station in a distributed networking;

fig. 5 is a schematic diagram of backhaul link access of a small station under a hybrid networking;

fig. 6 is a flowchart of an access method according to a third embodiment of the present invention;

fig. 7 is a flowchart of an access method according to a fourth embodiment of the present invention;

fig. 8 is a schematic structural diagram of an access device according to a fifth embodiment of the present invention;

fig. 9 is a schematic structural diagram of an access device according to a sixth embodiment of the present invention;

fig. 10 is a schematic structural diagram of an access device according to a seventh embodiment of the present invention;

fig. 11 is a schematic structural diagram of an access device according to an eighth embodiment of the present invention.

Detailed Description

In the embodiment of the present invention, the first node may initiate an access request message to the autonomously selected at least one second node, and determine, based on the received access response message fed back by the at least one second node, a donor node that finally provides backhaul service for the donor node. By adopting the mode, the donor node providing the backhaul service can be flexibly and conveniently selected for the plug-and-play access point, and the OAM is not needed to configure the donor cell list for the access point, so that the configuration and maintenance work of the network side is saved.

In the embodiment of the present invention, the donor node providing the backhaul service for the first node may be not only a macro base station, but also any other node that can meet the backhaul requirement of the first node, such as an adjacent Access Point (AP). In addition, in the embodiment of the present invention, there may be one or more donor nodes that provide backhaul services for the first node. The first node may be connected to a donor node via a wireless link, which may also have its own donor node, i.e. may form a multi-hop backhaul path.

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.

Example one

As shown in fig. 2, a flowchart of an access method provided in an embodiment of the present invention includes the following steps:

s201: the first node sends an access request message to the selected at least one second node, for requesting the second node to serve as a Donor (Donor) node of the first node, and providing backhaul service for the first node.

S202: and the second node judges whether the second node can be used as a Donor node of the first node or not based on the received access request message, and sends an access response message to the first node based on the judgment result.

S203: and the first node determines the nodes which can be served as the Donor nodes of the first node in the at least one second node according to the received access response message of the second node.

In S201, the first node may select a second node occupying a frequency point supported by the first node to send an access request message, and request the second node to serve as a Donor node of the first node to provide backhaul service for the first node. The first node may select the second node in the following ways:

the first method is as follows: selecting a second node according to the adjacent cell measurement result;

specifically, the first node performs neighbor measurement; and selecting the at least one second node according to the neighbor cell measurement result.

In a specific implementation process, after being powered on, the first node may perform neighbor cell signal search on a frequency point supported by the first node (where each node may send a reference signal for other nodes to find the first node, for example, to find the reference signal), measure a neighbor cell of the searched signal, and determine a signal measurement result of the neighbor cell occupying the frequency point supported by the first node. For example, the frequency points supported by the first node include 2.0GHz, 2.6GHz, and 3.4GHz-3.6GHz, the neighboring macro base station operates at 2.0GHz, and the neighboring small base station (hereinafter referred to as a small station) operates at 3.5GHz, and then the first node measures the macro base station and the small station to obtain one or more of measurement results of Reference Signal Receiving Power (RSRP), Reference Signal Quality (RSRQ), Signal to Interference noise ratio (SINR), and the like.

In a specific implementation, the first node may select to send the access request message to one second node with the best measurement result or select to send the access request message to several second nodes with better measurement results based on the neighbor measurement result. For example, the second node with the largest RSRP measurement value may be selected, or the second node with the RSRP measurement value larger than the preset RSRP threshold value may be selected.

And in the second mode, the second node is selected according to the backhaul information of the neighboring node.

Specifically, backhaul information sent by at least one neighboring node is received; selecting the at least one second node according to the received backhaul information.

In particular implementations, each node may broadcast its backhaul information to indicate its backhaul capabilities to other nodes. The backhaul information may include one or more of the following:

time delay information;

throughput information.

In the backhaul information, the backhaul level information indicates the number of hops of the backhaul link that the data transmitted via the node experiences, and the backhaul level information may be indicated in such a manner that the smaller the number of hops, the lower the level. Here, the hop count of the backhaul link experienced by the data transmitted via the node is also the number of backhaul links experienced by the data arriving from the node to the node having the wired backhaul link, arriving at the node having the dedicated microwave backhaul link, arriving at the IP network, or the like. For example, for a macro base station, since the macro base station has a wired backhaul link, the backhaul level of the macro base station is 0; for a small station with a wired backhaul link, the backhaul level is 0; for a small station with a dedicated microwave backhaul link, the backhaul level is also 0; for a small station with a wireless backhaul link, the backhaul level is the level of the previous hop node after adding 1.

The backhaul level information is used to indicate the comprehensive characteristics of one or more of the backhaul link attribute, the latency, and the throughput, for example, a backhaul link with smaller latency and larger throughput is referred to as an ideal backhaul link, and a backhaul link with larger latency and smaller throughput is referred to as a non-ideal backhaul link; the backhaul level of a node having a wired ideal backhaul link or an ideal backhaul link with dedicated wireless microwaves may be defined as a level a, the backhaul level of a node having a wired non-ideal backhaul link or a non-ideal backhaul link with dedicated wireless microwaves may be defined as a level B, the backhaul level of a node having a wireless backhaul link may be defined as a level C, and the backhaul levels may be A, B, C levels in sequence from high to low.

The backhaul information may also include specific latency and/or throughput information; specifically, the delay and throughput information may be indicated in a hierarchical manner, for example, when the delay (referred to herein as one-way delay) <2.5us and the throughput >10Gbps, corresponding to a level of L1, and when the delay is 2-5ms and the throughput is 50M-10Gbps, corresponding to a level of L2; when the time delay is 10-30ms and the throughput is 10M-10Gbps, or when the time delay is 15-60ms and the throughput is 10M-100Mbps, the level of L3 is corresponded; the time delay and throughput characteristics are time delay and throughput characteristics corresponding to a wired backhaul link, and for a wireless backhaul link, the time delay is generally 5-35ms, the throughput is generally 10M-100Mbps, and the level of Gbps can also be achieved.

Based on the backhaul information, the first node may select a second node with a lower backhaul level, a higher backhaul level, and a delay and throughput that satisfy backhaul requirements of the first node, and send an access request message to the selected second node. In particular implementations, the first node may determine its backhaul requirements based on the estimated traffic needs. For example, the maximum demand value for throughput is determined according to the coverage and traffic density demand of the device; determining an upper limit value of the time delay according to the service time delay requirement; determining a required value of throughput according to the bandwidth and the spectrum efficiency required by the service in the coverage range; the process of selecting the second node is semi-static, and compared with a mode of dynamically determining the second node in real time based on dynamically changed service data, the signaling overhead is low.

In particular implementations, a first node may send an access request message to a selected one or more second nodes. When a plurality of second nodes are selected, each second node may be a node that meets the backhaul requirements of the first node; or, any node of the plurality of second nodes cannot satisfy the backhaul requirement of the first node by itself, but the plurality of second nodes as a whole can satisfy the backhaul requirement of the first node, that is, the first node sends the access request message to the selected plurality of second nodes; the sum of the throughputs of the backhaul links requested by the first node to the second nodes can meet the throughput requirement of the first node on the backhaul links. In a specific implementation, the first node may rank the neighboring nodes in descending order from superior to inferior according to the backhaul characteristics, select a set number of second nodes according to the ranking order, and send an access request message to the set number of second nodes.

Optionally, in the second mode, the first node may receive backhaul information sent by any neighboring node according to the following modes:

after the first node is accessed to the neighboring node, the first node receives backhaul information sent by the neighboring node through a Radio Resource Control (RRC) message; or,

and the first node receives the broadcast message which is sent by the adjacent node and carries the backhaul information.

In a specific implementation process, a first node can randomly access a neighboring node by using the identity of a user terminal, and establishes Radio Resource Control (RRC) connection with the neighboring node, and the neighboring node notifies backhaul information of the first node through an RRC message; or, the first node reads the backhaul information notified by the neighboring node through a broadcast message, where the broadcast message is broadcast for the small station requiring the backhaul link service, and is not broadcast for the UE.

The third method comprises the following steps: the combination of the first and second modes.

In a specific implementation, the first and second manners may be combined to select the second node. Namely, carrying out neighbor cell measurement and receiving backhaul information sent by at least one neighbor cell node; and selecting at least one second node according to the neighbor cell measurement result and the received backhaul information.

For example, the second node may be selected based on RSRP measurements and backhaul level: specifically, a node with an RSRP measurement value greater than a preset threshold value and a lowest backhaul level is selected, and if a plurality of selected nodes exist, a second node with a largest RSRP measurement value may be selected from the selected nodes and an access request message may be sent to the second node.

As another example, the second node may be selected based on RSRP measurement, backhaul level, time delay, throughput information; specifically, first, a node is selected, the RSRP measurement value of which is smaller than a preset threshold value and the characteristics of delay and throughput of which meet the backhaul requirement of the first node, then a node with the lowest backhaul level is selected from the selected nodes, and if a plurality of nodes with the lowest backhaul level exist, then a second node with the largest RSRP measurement value is selected from the selected nodes, and an access request message is sent to the second node.

For another example, if one node cannot meet the throughput requirement of the first node, a plurality of second nodes may be selected to jointly meet the backhaul requirement of the first node. Specifically, a plurality of nodes with RSRP measurement values smaller than a preset threshold value may be selected first, the plurality of nodes are arranged in descending order from superior to inferior according to backhaul characteristics, and a plurality of second nodes capable of meeting backhaul requirements of a first node together are selected according to the arrangement order; in this process, if there are a plurality of nodes with the same backhaul characteristics and only part of the plurality of nodes with the same backhaul characteristics need to be selected, the node with the lowest backhaul level may be selected, and if the number of the nodes with the lowest backhaul level still exceeds the requirement, the second node with the largest RSRP measurement value among the nodes with the lowest backhaul level is selected again and the access request message is sent to the second node.

There are various embodiments of the third embodiment obtained by combining the first embodiment and the second embodiment, and the embodiments of the present invention are only described above by way of example, and any specific embodiment of the third embodiment obtained by combining the first embodiment and the second embodiment is within the scope of the present invention.

In S201, the second node selected by the first node may be a macro base station (DeNB) or a small station; the backhaul link of the macro base station is a wired backhaul, the corresponding backhaul level is 0, the macro base station operates at 2.0GHz, and the system bandwidth may be smaller, so that the bandwidth of the wireless link between the macro base station and the first node is smaller, and the backhaul requirement of the first node may not be met. The second node selected by the first node may be a small station, for example, an AP, and if the backhaul level of the AP is 0, the AP has a wired backhaul or a dedicated microwave backhaul, and a bandwidth of a wireless link between the AP and the first node may be small, and when a backhaul requirement of the first node is large, a requirement of the first node may not be met; if the backhaul level of the AP is greater than 0, the backhaul link of the AP is a wireless backhaul link, and when the backhaul requirement of the first node is large, the requirement of the first node may not be met. In the above situation, if one node cannot meet the backhaul requirement of the first node, a plurality of nodes may be selected together to provide backhaul service for the first node, so as to meet the backhaul requirement of the first node.

In S202, the second node determines whether it is capable of providing backhaul service to the first node based on the received access request message, and sends an access response message accepting or rejecting as a Donor node to the first node based on the determination result.

Optionally, the access request message sent by the first node to the second node may include one or more of the following information:

the frequency point and the bandwidth supported by the first node;

a neighbor measurement result of the first node.

Optionally, the second node determines whether itself can be a Donor node of the first node based on the access request message of the first node and one or more of the following information:

the frequency point and the bandwidth supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

Here, information indicating the access link characteristics of the second node, such as information of bandwidth, load, and the like of an access link under the second node; the backhaul link of the second node, that is, the backhaul link between the second node and the previous hop node thereof, and the information indicating the characteristics of the backhaul link of the second node may include information such as latency, throughput, and load of the backhaul link of the second node.

In a specific implementation process, the second node may consider a frequency point and a bandwidth supported by the second node, where the second node has one or more of information such as a delay, throughput, and load of a backhaul link, and a bandwidth and a load of a responsible access link, and determines, by combining information in the access request message, whether to provide a backhaul service for the first node, and whether to meet a backhaul requirement of the first node. Optionally, when determining the backhaul requirement of the first node that the second node can support, the second node may reserve a partial margin for itself to prevent the influence of traffic fluctuation, for example, if the throughput requested by the first node is Xbps, if the throughput that the second node can provide is not less than (X + delta1) bps, the second node confirms that the throughput requirement of the first node can be met, and delta1 is the throughput margin reserved for the second node. Similarly, if the delay requested by the first node is Y ms, and if the delay size that the second node can provide is not greater than (Y-delta2) ms, the second node confirms that the requirement of the first node on the delay can be met, and delta2 is the delay margin reserved by the second node.

For example, if the access request message sent by the first node includes a frequency point supported by the first node, the second node determines whether the second node can be a Donor node of the first node based on the frequency point supported by the second node and the frequency point included in the access request message of the first node. For example, if the frequency point supported by the second node is f1, and the indicated frequency points supported by the first node in the access request message of the first node are f1 and f2, the access response message sent by the second node to the first node is an indication of acceptance as a Donor node, where the access response message includes the frequency point f1 used by the backhaul link.

For another example, if the access request message sent by the first node includes the information about the demand for the throughput of the backhaul service, the second node determines whether the second node can serve as a Donor node of the first node based on the throughput of the existing backhaul link. For example, the throughput of the existing backhaul link of the second node is 100 Mbps; in the access request message of the first node, the requested throughput is 60Mbps, the second node determines that the throughput of the existing backhaul link is 100Mbps >60Mbps + delta1(delta1 is 10Mbps), and the requirement of the first node can be met, and then the access response message which indicates that the backhaul service can be provided is accepted is sent to the first node, wherein the access response message comprises the throughput of the backhaul service which can be provided, namely 60 Mbps. Here, after receiving the access request message of the first node, the second node may default that the frequency points occupied by the second node include the frequency points supported by the first node.

For another example, if the access request message sent by the first node includes the neighbor cell measurement result, the second node determines whether the second node can be used as a Donor node of the first node based on each frequency point supported by the second node and the neighbor cell measurement result corresponding to each frequency point included in the access request message of the first node. For example, the access request message of the first node includes measurement frequency points f1, f2, and f3, and interference conditions on each frequency point indicated by neighbor measurement results: interference on a f1 frequency point is greater than interference on a f2 frequency point and greater than interference on a f3 frequency point, frequency points supported by the second node are f1 and f2, the second node selects a frequency point f2 with smaller interference from f1 and f2 to provide backhaul service for the first node, and sends an access response message indicating acceptance as a Donor node to the first node, wherein the access response message comprises the frequency point f2 used by a backhaul link.

For another example, if the access request message sent by the first node includes the supported frequency point, the information about the throughput required by the first node, and the neighbor cell measurement result, the second node determines whether the second node can serve as a Donor node of the first node based on the throughput of the backhaul link of the second node and the information about the frequency point, the load, and the like of the responsible access link. For example, the frequency points supported by the second node are f1 and f2, the frequency point responsible for the access link is f1, the load is 40%, and the throughput of the existing backhaul link is 100 Mbps; in the access request message of the first node, the indicated supported frequency points are f1, f2 and f3, the requested throughput is 60Mbps, and the interference situation on each frequency point indicated by the neighbor measurement result is: interference on the f1 frequency point is greater than interference on the f2 frequency point is greater than interference on the f3 frequency point; the second node determines that the throughput of the existing backhaul link is 100Mbps >60Mbps + delta1(delta1 is 10Mbps), and since the f1 frequency point is the frequency point used by the access link, the load is high, and the interference is large, the frequency point f2 with low load (unused) is selected to provide the backhaul service for the first node, and then an access response message indicating acceptance as a Donor node is sent to the first node, wherein the access response message includes the frequency point f2 used by the backhaul link and the throughput of the backhaul service capable of being provided, namely 60 Mbps.

Optionally, in S202, if the second node determines that only part of the throughputs requested by the first node can be provided, the sent access response message may include information of the part of throughputs that the second node can provide.

For example, the frequency points supported by the second node are f1 and f2, the frequency point of the responsible access link is f1, the bandwidth is 20MHz, the load is 40%, and the throughput of the existing backhaul link is 50 Mbps; in the access request message of the first node, the supported frequency points are f1, f2 and f3, the requested throughput is 60Mbps, and the interference situation on each frequency point indicated by the neighbor measurement result is as follows: interference on the f1 frequency point is greater than interference on the f2 frequency point is greater than interference on the f3 frequency point; the second node determines that the throughput of the existing backhaul link is 50Mbps <60Mbps + delta1(delta1 is 10Mbps), only part of backhaul requirements are met, and since the f1 frequency point is the frequency point used by the access link, the load is high, and the interference is large, the frequency point f2 with low load (unused) is selected to provide backhaul service for the first node, and then an access response message indicating acceptance as a Donor node is sent to the first node, wherein the access response message comprises the supported frequency point f2 and the throughput of the backhaul service which can be provided, namely 50Mbps-delta1 is 40 Mbps.

and the second node sends back a program capacity expansion request message to at least one third node based on the throughput requested by the first node and the partial throughput which can be provided by the second node at present, and the program capacity expansion request message is used for requesting the third node to increase the throughput of the backhaul service.

Specifically, the sending back, by the second node, a range expansion request message to the at least one third node includes:

the second node sends back a program expansion request message to a third node of the Donor node as the second node; and/or the presence of a gas in the gas,

the second node sends an access request message to a selected non-accessed third node, and the access request message is used for requesting the selected third node to serve as a Donor node of the second node and providing backhaul service for the second node; the access request message includes information on the throughput demand of the second node for the backhaul service.

In a specific implementation, if the second node can only provide a part of the throughput requested by the first node, the second node may first request a capacity expansion backhaul service to at least one third node, and after the capacity expansion is successful, send an access response message to the first node, where the access response message at this time may include information of all throughputs requested by the first node.

In S202, if the second node determines that the backhaul service cannot be provided for the first node, an access response message indicating that the first node is rejected as a Donor node may be sent to the first node.

For example, the frequency points supported by the second node are f1 and f2, the frequency point of the responsible access link is f1, the bandwidth is 20MHz, the load is 80%, and the throughput of the existing backhaul link is 50 Mbps; in the access request message of the first node, the supported frequency points are f1 and f3, the throughput of the requested backhaul link is 60Mbps, and the interference situation on each frequency point indicated by the neighbor measurement result is: the interference on the f1 frequency point is larger than that on the f3 frequency point; the second node determines that the throughput of the existing backhaul link is 50Mbps <60Mbps + delta1(delta1 is 10Mbps), and meets the requirement of partial backhaul, but the f1 frequency point which can be supported by the second node and is the same as the f1 frequency point of the first node is the frequency point used by the access link, so that the second node has higher load and larger interference and cannot provide backhaul service, and therefore, the second node sends an access response message indicating that the second node rejects the access response message as a Donor node.

In S203, the first node determines, according to the received access response message of the second node, a node that can be a Donor node of the first node in the at least one second node, and accesses the determined node. For example, if the access response message of the second node indicates that the Donor node as the first node is accepted, the second node may be selected as the Donor node for access.

Specifically, a first node determines, according to a received access response message of a second node, whether there is a second node that can meet a backhaul requirement of the first node, where the backhaul requirement includes a requirement for throughput; if so, selecting the second node as a Donor node of the first node; otherwise, if a plurality of second nodes do not reject the Donor Donor node as the first node and the sum of the throughputs of the backhaul links that the plurality of second nodes can provide meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

After S203, the first node may send an access confirmation message to the determined Donor node for indicating confirmation of backhaul service provided by the Donor node for the first node.

Correspondingly, after receiving the access confirmation message sent by the first node, the second node confirms the Donor node which needs to be used as the first node, and provides backhaul service for the first node.

Here, after determining that the backhaul service needs to be provided for the first node, the second node may first make a preparation for providing the backhaul service for the first node, for example, open a frequency point used by a backhaul link between the second node and the first node, which is fed back in the access response message, and make a resource reservation for the backhaul service, for example, reserve a throughput for providing the backhaul service for the first node, and the like.

In S203, if the first node determines that the second nodes sending the access response message all reject the Donor node as the first node or that the throughput that can be provided by the second node that does not reject the Donor Donor node as the first node does not meet the requirement of the first node according to the received access response message of the second node, the first node may reselect at least one second node after a preset time length elapses, and send the access request message to the reselected at least one second node.

Optionally, after S203, the first node determines backhaul information of itself based on the determined access response message of the Donor node, so as to provide backhaul service for other nodes.

In a specific implementation process, after a first node determines a Donor node providing backhaul service for the first node, backhaul information of the first node itself, including information such as a backhaul level, a delay, and a throughput, may be determined based on characteristics of a backhaul link between the first node and the Donor node (including a frequency point and a bandwidth used by the backhaul link, and a backhaul requirement supported by the Donor node), so that the backhaul information is sent to other nodes in a broadcast or RRC message form to provide backhaul service for other nodes when needed. Here, regarding backhaul information such as a backhaul level, if backhaul levels of a plurality of Donor nodes providing a backhaul service to a first node do not match, a value obtained by adding 1 to a level of a node having a largest backhaul level among the plurality of Donor nodes may be selected as its own level.

The embodiment of the invention can be suitable for backhaul link access under various networking modes, including centralized networking, distributed networking and hybrid networking, and has remarkable advantages particularly when being applied to distributed networking and hybrid networking. The centralized networking refers to the steps that a centralized control node controls a plurality of base stations, and resource management and control and coordination/cooperation among the base stations are carried out; distributed networking refers to the situation that no centralized control node exists, and coordination/cooperation is carried out among all base stations through negotiation; hybrid networking is a combination of the two.

Because there is no centralized control node in the distributed networking mode, the base stations are all self-deployed or plug-and-play, and the Donor nodes can be flexibly and conveniently determined for each base station by adopting the embodiment of the invention. This is further illustrated by a specific example.

Example two

Fig. 3 is a flowchart of an access method provided in a second embodiment of the present invention, and fig. 4 is a schematic diagram of a scenario applied in the second embodiment, where backhaul link access is performed for a small station under distributed networking; in fig. 4, a and B are small stations with wired backhaul links, which reach a core network through optical fiber connections, and C to F are small stations for self-deployment or plug-and-play, and a macro base station or A, B with wired backhaul links can be selected as donor nodes.

This embodiment comprises the following steps:

s301: the first node (e.g., AP0) performs neighbor measurements after powering on.

Specifically, the frequency points supported by the AP0 include 2.0GHz, 3.4GHz-3.6 GHz. An evolved Node B (eNB) adjacent to the AP0 operates at 2.0GHz, and an AP adjacent to the AP0 operates at 3.5 GHz. The AP0 carries out neighbor cell measurement to obtain RSRP measurement values of the adjacent eNB and the adjacent AP, wherein the RSRP measurement value of the eNB is-100 dBm, the RSRP measurement value of the AP1 is-80 dBm, and the RSRP measurement value of the AP2 is-110 dBm.

S302: the first node selects one or more second nodes based on the neighbor cell measurement results and the backhaul information of the neighbor cell nodes.

For example, the AP0 selects a second node with RSRP measurement value less than a preset RSRP threshold value (-100dBm), where the RSRP measurement values of both eNB and AP1 satisfy the condition. The AP0 is accessed to the eNB in the form of a user terminal, obtains backhaul information of the eNB through an RRC message, wherein the backhaul level of the eNB is indicated to be 0, and the AP0 obtains backhaul information of the AP1 through a broadcast message reading the AP1, wherein the backhaul level of the AP1 is also indicated to be 0. Since the backhaul levels of eNB and AP1 are the same, and the RSRP measurement value of AP1 is greater than the RSRP measurement value of eNB, AP0 chooses to send an access request message to AP 1.

S303: and the first node sends an access request message to the selected second node, wherein the access request message comprises the frequency points supported by the first node, throughput information in backhaul requirements and interference conditions on each frequency point in neighbor cell measurement results.

S304: the second node judges whether the second node can be used as a Donor node of the first node or not based on the access request message of the first node, the frequency point supported by the second node, the existing backhaul link characteristic and the access link characteristic;

s305: and after determining the Donor node capable of being used as the first node, the second node sends an access response message to the first node, wherein the access response message indicates that the Donor node used as the first node is accepted.

For example, in an access request message sent by the AP0, the frequency points supported by the AP0 are indicated as f1, f2, and f3, the throughput of the required backhaul service is 60Mbps, and the interference on each frequency point indicated by the neighbor measurement result is that the interference on the f1 frequency point is greater than the interference on the f2 frequency point is greater than the interference on the f3 frequency point. The frequency points supported by the AP1 are f1 and f2, the throughput of the existing backhaul link of the AP1 is 100Mbps, the frequency point of the access link supported by the AP1 is f1, the bandwidth is 20MHz, and the load is 40%. The AP1 determines that the throughput of the existing backhaul link is 100Mbps >60Mbps + delta1(delta1 ═ 10Mbps), which can meet the backhaul requirements of the AP 0. Since f1 is a frequency point used by the access link of AP1, and has a high load and large interference, frequency point f2 having a low load (unused) and small interference is selected as the frequency point of the backhaul link of AP 0. In this way, the AP1 transmits an access request response message indicating acceptance as a Donor node to the AP0, including the frequency f2 used by the backhaul link.

S306: after receiving the access response message fed back by the second node, the first node determines that the second node provides backhaul service for the first node, sends an access confirmation message to the second node, and determines backhaul information of the first node so as to provide backhaul service for other nodes.

For example, after receiving the access response message fed back by the AP1, the AP0 determines that the AP1 can provide backhaul service for itself, and determines the characteristics of a backhaul link between the AP0 and the AP1, that is, a frequency point used by the backhaul link is f2, and the throughput is 60 Mbps; the AP0 sends an access acknowledgement message to the AP1 and determines its backhaul information, i.e., backhaul level is 1 and throughput is 60 Mbps.

S307: and after receiving the access confirmation message sent by the first node, the second node confirms the Donor node which needs to be used as the first node, and provides backhaul service for the first node.

For example, after determining that the backhaul service needs to be provided for the AP0, the AP1 may first make a preparation for providing the backhaul service for the AP0, for example, open a frequency point f2 used by a backhaul link with the AP0, and make a resource reservation for the backhaul service, for example, reserve a throughput of 60Mbps for providing the backhaul service for the AP 0.

Besides distributed networking, the embodiment of the invention also has great advantages in hybrid networking. Fig. 5 is a schematic diagram illustrating backhaul link access for a small station in a hybrid networking.

In the hybrid networking, a part of nodes are controlled by a centralized control node (local controller, LC), and another part of nodes are not controlled by the centralized control node. In fig. 5, AP1 and AP2 are controlled by a centralized control node, and a wired backhaul link exists between them and the centralized control node, so that data and signaling can be transmitted. A wired link (such as a link of an X2 interface) exists between the macro base station and the centralized control node, and interaction of data and signaling can be carried out. The AP3, the AP4 and the AP5 are plug-and-play APs, a wireless backhaul link is established between the AP3 and a macro base station, and the macro base station is a Donor node of the AP3 and provides backhaul service for the AP 3. A wireless backhaul link is established between the AP4 and the AP1, and the AP1 is a Donor node of the AP4 and provides backhaul service for the AP 4. Meanwhile, a wireless backhaul link is established between the AP4 and the AP5, the AP4 is a Donor node of the AP5, the backhaul level of the AP4 is 1, and the backhaul level of the AP5 is 2, so that a multi-hop distributed network is formed. In the hybrid networking, the centralized control node may perform signaling interaction with the AP3, the AP4, and the AP5 through the established multi-hop backhaul path, coordinate the work among the APs, perform mobility management on the APs, and the like, thereby better providing services for the user terminal.

In the above embodiment, the centralized control node may control a plurality of base stations, is a higher node, and may be a logical entity or an independent device. Such as may be a separate access network node: a Local Gateway (LG) or a Local Controller (LC), or may be a core network node or an OAM (Operation Administration and Maintenance) node; the base station can also be a super base station, and the base station can manage a plurality of base stations; or a baseband pool in the C-RAN architecture, and collectively processes baseband signals of multiple Remote Radio Heads (RRHs). The base station may be a macro station, such as an evolved Node B (eNB), a base station (Node B, NB), etc.; or a small station, such as various Low Power Nodes (LPNs): pico base stations (pico), home base stations (femto), Relay Nodes (RN), etc., such as Access Points (AP); or a Remote Radio Head (RRH); or a capability-enhanced user terminal, such as a relay-capable user terminal.

The third and fourth embodiments are based on the description of the first node side and the second node side, and the detailed description refers to the description of the above embodiments and is not repeated here.

EXAMPLE III

As shown in fig. 6, a flowchart of an access method provided in the third embodiment of the present invention includes:

s601: a first node sends an access request message to at least one selected second node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node;

s602: and the first node determines a node which can be used as a Donor Donor node of the first node in the at least one second node according to the received access response message of the second node.

Optionally, in S601, the first node selects the at least one second node according to the following steps:

carrying out neighbor cell measurement; and selecting the at least one second node according to the neighbor cell measurement result.

Or, selecting the at least one second node according to the following steps:

receiving backhaul information sent by at least one neighboring node; selecting the at least one second node according to the received backhaul information.

Or, selecting the at least one second node according to the following steps:

Optionally, the receiving, by the first node, the backhaul information sent by any neighboring node according to the following steps includes:

and the first node determines own backhaul information based on the determined access response message of the Donor node so as to provide backhaul service for other nodes.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the method further comprises:

if the first node determines that the second nodes sending the access response messages all refuse the Donor Donor node as the first node or the throughput which can be provided by the second nodes not refuse the Donor Donor node as the first node does not meet the requirement of the first node according to the received access response messages of the second nodes, the first node determines that the second nodes sending the access response messages all refuse the Donor Donor node as the first node or that the throughput which can be provided by the second nodes not refuse the Donor Donor node as the first node does not meet the requirement of the first

the first node sends an access request message to a plurality of selected second nodes; wherein the sum of the throughputs of the backhaul services requested by the first node from the second nodes can satisfy the throughput demand of the first node on the backhaul link.

In a specific implementation process, the first node, based on backhaul information of the second nodes, may send an access request message to at least one second node if it is determined that each of the at least one second node can meet backhaul requirements of the first node, where throughput requested by each of the at least one second node is all throughput required by the first node, and finally, the first node may select one of the second nodes as a final Donor node based on an access response message of the at least one second node. If there is no second node that can individually satisfy the backhaul requirement of the first node, it may be determined that the first node is provided with backhaul services by a plurality of second nodes in common, and at this time, the sum of the respective requested throughputs from the plurality of second nodes can satisfy the throughput requirement of the first node.

Example four

As shown in fig. 7, a flowchart of an access method provided in the fourth embodiment of the present invention includes:

s701: a second node receives an access request message sent by a first node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node;

s702: and the second node judges whether the second node can be used as a Donor node of the first node or not, and sends an access response message to the first node based on the judgment result.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

Based on the same inventive concept, the embodiment of the present invention further provides an access apparatus corresponding to the access method, and as the principle of the apparatus for solving the problem is similar to the access method of the embodiment of the present invention, the implementation of the apparatus can refer to the implementation of the method, and repeated details are not repeated.

EXAMPLE five

As shown in fig. 8, a schematic structural diagram of an access device provided in a fifth embodiment of the present invention includes:

a transceiver module 81, configured to send an access request message to the selected at least one second node, where the access request message is used to request the second node to serve as a Donor node of a first node, and provide a backhaul service for the first node;

a determining module 82, configured to determine, according to the received access response message of the second node, a node that can serve as a Donor node of the first node in the at least one second node.

Optionally, the transceiver module 81 is specifically configured to select the at least one second node according to the following steps:

Optionally, the transceiver module 81 is specifically configured to receive backhaul information sent by any neighboring node according to the following steps:

Optionally, the determining module 82 is further configured to, after determining a node capable of serving as a Donor node of the first node, determine backhaul information of the node based on the access response message of the determined Donor node, so as to provide a backhaul link for other nodes.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the transceiver module 81 is further configured to:

if the determining module 82 determines that, according to the received access response message of the second node, the second nodes that send the access response message all reject the Donor Donor node as the first node, or do not reject the throughput of the backhaul service that can be provided by the second node as the Donor Donor node of the first node, does not meet the requirement of the first node, after a preset time length elapses, reselecting at least one second node, and sending an access request message to the reselected at least one second node.

Optionally, the determining module 82 is specifically configured to:

judging whether a second node can meet the backhaul requirement of the first node according to the received access response message of the second node, wherein the backhaul requirement comprises the requirement on throughput; if so, selecting the second node as a Donor Donor node of the first node; otherwise, if a plurality of second nodes do not reject the Donor Donor node as the first node and the sum of the throughputs of the backhaul services that the plurality of second nodes can provide meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

Optionally, the transceiver module 81 is specifically configured to:

sending an access request message to the selected plurality of second nodes; the sum of the throughputs of the backhaul services requested by the first node to the second nodes can meet the throughput requirement of the first node.

Optionally, the transceiver module 81 is further configured to, after the determining module 82 determines that a node, which is a Donor node of the at least one second node and can be the first node, send an access confirmation message to the Donor node determined by the determining module 82, where the access confirmation message is used to indicate that the Donor node provides backhaul service for the first node.

EXAMPLE six

As shown in fig. 9, a schematic structural diagram of an access device provided in a sixth embodiment of the present invention includes:

a receiving module 91, configured to receive an access request message sent by a first node, where the access request message is used to request a second node to serve as a Donor Donor node of the first node, and provide a backhaul service for the first node;

a determining module 92, configured to determine whether the second node can serve as a Donor node of the first node;

a sending module 93, configured to send an access response message to the first node based on a determination result of the determining module.

Optionally, the sending module 93 is further configured to notify the first node of backhaul information of the second node through a radio resource control, RRC, message or a broadcast message before the receiving module 91 receives the access request message sent by the first node; the backhaul information is used for the first node to select a node to send an access request message.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the determining module 92 is specifically configured to:

determining whether the second node is capable of acting as a Donor node for the first node based on the access request message and one or more of the following information:

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

Optionally, if the second node can only provide a part of the throughput requested by the first node, the sending module 93 is further configured to:

and sending a ranging request message back to at least one third node based on the throughput requested by the first node and the partial throughput which can be provided by the first node at present, wherein the ranging request message is used for requesting the third node to increase the throughput of the backhaul service.

Optionally, the sending module 93 is specifically configured to:

sending a program expansion request message back to a third node of the Donor node as the second node; and/or the presence of a gas in the gas,

sending an access request message to a selected non-accessed third node, wherein the access request message is used for requesting the selected third node to serve as a Donor node of the second node and providing backhaul service for the second node; the access request message comprises the requirement information of the second node on the throughput of the backhaul service.

Optionally, the determining module 92 is further configured to, after the sending module 93 sends the access response message to the first node, if the receiving module 91 receives the access confirmation message sent by the first node, confirm that the second node needs to be the Donor node of the first node, and provide a backhaul service for the first node.

EXAMPLE seven

As shown in fig. 10, a schematic structural diagram of an access device provided in a seventh embodiment of the present invention includes:

a processor 1004 for reading the program in the memory 1005 and executing the following processes:

sending, by the transceiver 1001, an access request message to the selected at least one second node, for requesting the second node to serve as a Donor node of the first node, and providing a backhaul service to the first node; determining a node of the at least one second node that can act as a Donor Donor node of the first node, according to an access response message of the second node received through the transceiver 1001;

a transceiver 1001 for receiving and transmitting data under the control of the processor 1004.

Optionally, the processor 1004 is specifically configured to select the at least one second node according to the following steps:

carrying out neighbor cell measurement;

and selecting the at least one second node according to the neighbor cell measurement result.

receiving, by a transceiver 1001, backhaul information sent by at least one neighboring node;

the at least one second node is selected according to backhaul information received through the transceiver 1001.

performing neighbor cell measurement, and receiving backhaul information sent by at least one neighbor cell node through the transceiver 1001;

the at least one second node is selected based on the neighbor measurement result and the backhaul information received via the transceiver 1001.

Optionally, the processor 1004 is specifically configured to:

after accessing the neighboring node, instructing the transceiver 1001 to receive backhaul information sent by the neighboring node through a radio resource control RRC message; or,

the transceiver 1001 receives a broadcast message carrying backhaul information sent by the neighboring node.

Optionally, the processor 1004 is specifically configured to, after determining a node capable of serving as a Donor node of the first node, determine backhaul information of the node based on an access response message of the determined Donor node, so as to provide a backhaul link for another node.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the processor 1004 is further configured to:

determining that all second nodes sending the access response message reject the Donor Donor node as the first node or throughput of backhaul service that can be provided by the second nodes not rejecting the Donor Donor node as the first node does not meet the requirement of the first node according to the access response message of the second node received through the transceiver 1001, reselecting at least one second node after a preset time length elapses, and sending the access request message to the reselected at least one second node through the transceiver 1001.

Optionally, the processor 1004 is specifically configured to:

according to the access response message of the second node received by the transceiver 1001, determining whether there is a second node capable of meeting the backhaul requirement of the first node, where the backhaul requirement includes a requirement for throughput; if so, selecting the second node as a Donor Donor node of the first node; otherwise, if a plurality of second nodes do not reject the Donor Donor node as the first node and the sum of the throughputs of the backhaul services that the plurality of second nodes can provide meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

Optionally, the processor 1004 is specifically configured to:

transmitting, by the transceiver 1001, an access request message to the selected plurality of second nodes; the sum of the throughputs of the backhaul services requested by the first node to the second nodes can meet the throughput requirement of the first node.

Optionally, the processor 1004 is also configured to,

after determining a node of the at least one second node that is capable of serving as a Donor node of the first node, sending, by the transceiver 1001, an access confirmation message to the determined Donor node for indicating confirmation of backhaul service provided by the Donor node to the first node.

In fig. 10, a bus architecture (represented by bus 1000), bus 1000 may include any number of interconnected buses and bridges, bus 1000 linking together various circuits including one or more processors, represented by processor 1004, and memory, represented by memory 1005. The bus 1000 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1003 provides an interface between the bus 1000 and the transceiver 1001. The transceiver 1001 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 1004 is transmitted over a wireless medium via antenna 1002, and further, antenna 1002 receives data and transmits data to processor 1004.

The processor 1004 is responsible for managing the bus 1000 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 1005 may be used for storing data used by the processor 1004 in performing operations.

Alternatively, the processor 1004 may be a CPU (central processing unit), an ASIC (Application specific integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

Example eight

As shown in fig. 11, a schematic structural diagram of an access device provided in an eighth embodiment of the present invention includes:

a processor 1104 for reading the program in the memory 1105, and executing the following processes:

receiving, by a transceiver 1101, an access request message sent by a first node, where the access request message is used to request a second node to serve as a Donor Donor node of the first node, and provide a backhaul service for the first node; determining whether a second node can be a Donor node of the first node, and based on the determination result, transmitting an access response message to the first node through the transceiver 1101;

a transceiver 1101 for receiving and transmitting data under the control of the processor 1104.

Optionally, the processor 1104 is specifically configured to:

before receiving, by the transceiver 1101, an access request message sent by a first node, instructing the transceiver 1101 to notify the first node of backhaul information of the second node through a radio resource control, RRC, message or a broadcast message; the backhaul information is used for the first node to select a node to send an access request message.

time delay information;

throughput information.

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

Optionally, the processor 1104 is specifically configured to:

based on the access request message and one or more of the following information, determining whether a second node can be a Donor node of the first node:

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

Optionally, if the second node can only provide a part of the throughput requested by the first node, the processor 1104 is further configured to:

based on the requested throughput of the first node and the partial throughput that the second node is currently capable of providing, a request message for a request to the third node to increase the throughput of the backhaul service is sent back to the at least one third node via the transceiver 1101.

Optionally, the processor 1104 is specifically configured to:

sending back, by the transceiver 1101, a range expansion request message to a third node that is a Donor node of the second node; and/or the presence of a gas in the gas,

sending, by the transceiver 1101, an access request message to a selected non-accessed third node, for requesting the selected third node to serve as a Donor node of the second node, and providing a backhaul service to the second node; the access request message comprises the requirement information of the second node on the throughput of the backhaul service.

Optionally, the processor 1104 is further configured to, after sending the access response message to the first node through the transceiver 1101, if receiving an access confirmation message sent by the first node through the transceiver 1101, confirm that a second node needs to be a Donor node of the first node, and provide a backhaul service for the first node.

In fig. 11, a bus architecture (represented by bus 1100), bus 1100 may include any number of interconnected buses and bridges, bus 1100 linking together various circuits including one or more processors, represented by processor 1104, and memory, represented by memory 1105. The bus 1100 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1103 provides an interface between the bus 1100 and the transceiver 1101. The transceiver 1101 may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by the processor 1104 is transmitted over a wireless medium via the antenna 1102, and further, the antenna 1102 receives the data and transmits the data to the processor 1104.

The processor 1104 is responsible for managing the bus 1100 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 1105 may be used to store data used by processor 1104 in performing operations.

Alternatively, the processor 1104 may be a CPU (central processing unit), an ASIC (Application specific integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An access method, characterized in that the method comprises:

a first node sends an access request message to at least one selected second node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node; the at least one second node comprises M macro base stations and N small stations, wherein M and N are positive integers, and M + N is greater than or equal to 2;

the first node determines a node which can be used as a Donor Donor node of the first node in the at least one second node according to the received access response message of the second node;

the determining, by the first node, a node that can be a Donor node of the first node in the at least one second node according to the received access response message of the second node, includes:

the first node judges whether a second node can meet the backhaul requirement of the first node according to the received access response message of the second node, wherein the backhaul requirement comprises the requirement on throughput; and if one second node does not exist to meet the backhaul requirement of the first node, a plurality of second nodes do not reject the Donor node as the first node, and the sum of the throughputs of the backhaul services provided by the plurality of second nodes meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

2. The method of claim 1, wherein the first node selects the at least one second node according to the following steps:

3. The method of claim 2, wherein the first node receives backhaul information sent by any neighboring node according to the following steps:

4. The method of claim 1, wherein after the first node determines a node that can be a Donor node of the first node, further comprising:

5. A method as claimed in any one of claims 2 to 4, wherein the backhaul information for any node comprises one or more of:

time delay information;

throughput information.

6. The method of claim 1, wherein the access request message includes one or more of the following information:

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

7. The method of claim 1, wherein the method further comprises:

if the first node determines that the second nodes sending the access response messages all refuse the Donor nodes as the first node or the throughput of the backhaul service which can be provided by the second nodes not refuse the Donor nodes as the first node does not meet the requirement of the first node according to the received access response messages of the second nodes, the first node determines that the second nodes sending the access response messages all refuse the Donor nodes as the first node or that the throughput of the backhaul service which can be provided by the second nodes not refuse the Donor nodes as the first node does not meet the requirement

8. The method of claim 1, wherein the first node sending an access request message to the selected at least one second node, comprising:

9. The method of claim 1, wherein after the first node determines a node of the at least one second node that is capable of being a Donor node of the first node, further comprising:

10. An access method, characterized in that the method comprises:

a second node receives an access request message sent by a first node, wherein the access request message is used for requesting the second node to serve as a Donor Donor node of the first node and providing backhaul service for the first node; the second node is one of at least one node requested by the first node, the at least one node comprises M macro base stations and N small stations, M and N are positive integers, and M + N is greater than or equal to 2;

the second node judges whether the second node can be used as a Donor node of the first node or not, and sends an access response message to the first node based on a judgment result, wherein if the second node can only provide part of the throughput requested by the first node, the access response message comprises information of the part of the throughput which can be provided by the second node, so that the first node judges whether a second node can meet the backhaul requirement of the first node or not according to the received access response message of the second node, wherein the backhaul requirement comprises the requirement for the throughput; and if one second node does not exist to meet the backhaul requirement of the first node, a plurality of second nodes do not reject the Donor node as the first node, and the sum of the throughputs of the backhaul services provided by the plurality of second nodes meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

11. The method of claim 10, wherein before the second node receives the access request message sent by the first node, further comprising:

12. The method of claim 10, wherein the access request message includes one or more of the following information:

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

13. The method of claim 12, wherein the second node determining whether it can act as a Donor node for the first node comprises:

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

14. The method of claim 10, wherein if the second node can only provide a fraction of the throughput requested by the first node, the method further comprises:

15. The method of claim 14, wherein the second node sending back a range expansion request message to at least one third node, comprising:

16. The method of claim 10, wherein the second node, after sending the access response message to the first node, further comprises:

17. An access device, comprising:

a transceiver module, configured to send an access request message to at least one selected second node, where the access request message is used to request the second node to serve as a Donor node of a first node, and provide backhaul service for the first node; the at least one second node comprises M macro base stations and N small stations, wherein M and N are positive integers, and M + N is greater than or equal to 2;

a determining module, configured to determine, according to a received access response message of a second node, a node that can serve as a Donor Donor node of the first node in the at least one second node;

the determining module is specifically configured to:

judging whether a second node can meet the backhaul requirement of the first node according to the received access response message of the second node, wherein the backhaul requirement comprises the requirement on throughput; and if one second node does not exist to meet the backhaul requirement of the first node, a plurality of second nodes do not reject the Donor node as the first node, and the sum of the throughputs of the backhaul services provided by the plurality of second nodes meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

18. The apparatus as claimed in claim 17, wherein said transceiver module is specifically configured to select said at least one second node according to the following steps:

19. The apparatus as claimed in claim 18, wherein the transceiver module is specifically configured to receive backhaul information sent by any neighboring node according to the following steps:

20. The apparatus of claim 17, wherein the determining module is further configured to, after determining a node capable of being a Donor node of the first node, determine backhaul information of itself based on an access response message of the determined Donor node to provide backhaul links for other nodes.

21. The apparatus of claim 17, wherein the transceiver module is further configured to:

if the determining module determines that the second nodes sending the access response messages all refuse the Donor nodes as the first nodes or the throughput of the backhaul service which can be provided by the second nodes not refuse the Donor nodes as the first nodes does not meet the requirement of the first nodes according to the received access response messages of the second nodes, the determining module determines that the second nodes sending the access response messages all refuse the Donor nodes as the first nodes or the throughput of the backhaul service which can be provided by the second nodes not refuse the Donor nodes as the first nodes does not meet the requirement

And after the preset time length passes, reselecting at least one second node, and sending an access request message to the reselected at least one second node.

22. The apparatus as claimed in claim 17, wherein said transceiver module is specifically configured to:

23. The apparatus of claim 17, wherein the transceiver module is further configured to, after the determining module determines a node of the at least one second node that is capable of serving as a Donor node of the first node, send an access confirmation message to the Donor node determined by the determining module to indicate confirmation that the Donor node is providing backhaul service for the first node.

24. An access device, comprising:

a receiving module, configured to receive an access request message sent by a first node, where the access request message is used to request a second node to serve as a Donor Donor node of the first node, and provide a backhaul service for the first node; the second node is one of at least one node requested by the first node, the at least one node comprises M macro base stations and N small stations, M and N are positive numbers, and M + N is greater than or equal to 2;

a sending module, configured to send an access response message to the first node based on a determination result of the determining module; if the second node can only provide part of the throughput requested by the first node, the access response message includes information of the part of the throughput that the second node can provide, so that the first node determines whether a second node can meet the backhaul requirement of the first node according to the received access response message of the second node, where the backhaul requirement includes the requirement for the throughput; and if one second node does not exist to meet the backhaul requirement of the first node, a plurality of second nodes do not reject the Donor node as the first node, and the sum of the throughputs of the backhaul services provided by the plurality of second nodes meets the backhaul requirement of the first node, selecting the plurality of second nodes as the Donor node of the first node.

25. The apparatus of claim 24, wherein the sending module is further configured to notify the first node of backhaul information of the second node through a Radio Resource Control (RRC) message or a broadcast message before the receiving module receives the access request message sent by the first node; the backhaul information is used for the first node to select a node to send an access request message.

26. The apparatus of claim 24, wherein the access request message includes one or more of the following information:

frequency points and/or bandwidths supported by the first node;

a neighbor measurement result of the first node.

27. The apparatus of claim 26, wherein the determining module is specifically configured to:

frequency points and/or bandwidths supported by the second node;

information indicative of access link characteristics of the second node;

information indicative of backhaul link characteristics of the second node.

28. The apparatus of claim 24, wherein if the second node can only provide a fraction of the throughput requested by the first node, the sending module is further configured to:

29. The apparatus of claim 28, wherein the sending module is specifically configured to:

30. The apparatus of claim 24, wherein the determining module is further configured to, after the sending module sends the access response message to the first node, if the receiving module receives an access confirmation message sent by the first node, confirm that the second node needs to be a Donor node of the first node, and provide a backhaul service for the first node.