CN104039015B

CN104039015B - Distribution method and device, the system of random access resource

Info

Publication number: CN104039015B
Application number: CN201310068985.7A
Authority: CN
Inventors: 常俊仁; 曾清海; 黄曲芳; 陈玉华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2013-03-05
Filing date: 2013-03-05
Publication date: 2017-12-05
Anticipated expiration: 2033-03-05
Also published as: CN104039015A

Abstract

The embodiment of the invention discloses a kind of distribution method of random access resource and device, system, the present embodiment determines the Stochastic accessing configuration information that cell uses by the network equipment, and the Stochastic accessing configuration information used of the cell is not present with the Stochastic accessing configuration information that neighbours' cell of the cell uses and conflicted, the Stochastic accessing configuration information includes preamble information and Physical Random Access Channel information；The network equipment sends the Stochastic accessing configuration information of the determination to the user equipment of the cell, so that user equipment cell according to the Stochastic accessing configuration information Stochastic accessing of the determination.Solves the problems, such as the collision probability of the random access lead code present in existing cell random access procedure, between increase cell and between cell and macrocell.

Description

Method, device and system for distributing random access resources

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method, a device and a system for allocating random access resources.

Background

In an existing Long Term Evolution (LTE) system, when a ue accesses a cell to operate, a random access procedure needs to be performed first to obtain uplink synchronization and establish Radio Resource Control (RRC) connection with the cell, before normal communication can be performed.

However, in order to increase the transmission rate of the wireless network and enhance the user experience, a high-band carrier with rich resources is required to be used gradually to provide services, and since the high-band carrier has a characteristic of small coverage, a base station using the high-band carrier for small coverage is called a small base station (or a small base station), and the coverage area of the small base station is called a small cell. In such a small cell network, a large number of small cells will be operating simultaneously under the coverage of one macro network. In general, small cells are deployed by users themselves, without good network planning, each small cell uses random access preamble codes (preambles) used by the existing LTE system out of order, and thus, the collision probability of the random access preamble codes between the small cells and the macro cell is increased. With the introduction of small cell technology, how to reduce random access preamble collisions between different cells becomes a problem.

Disclosure of Invention

Embodiments of the present invention provide a method, an apparatus, and a system for allocating random access resources, so as to reduce collision probabilities of random access preambles between small cells and between a small cell and a macro cell in a random access process of the small cells.

In a first aspect, the present invention provides a method for allocating random access resources, which is applied in a small cell network, and includes:

the network equipment determines random access configuration information used by the small cell, wherein the random access configuration information comprises preamble code information and physical random access channel information or configuration information used for generating the preamble code;

the network equipment transmits the random access configuration information to user equipment of the small cell so as to enable the user equipment to perform random access to the small cell according to the preamble code information and physical random access channel information, or generates a preamble code according to the configuration information for generating the preamble code, and performs random access to the small cell by using the generated preamble code.

In a first possible implementation manner, based on the first aspect, the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, the root sequence for generating the preamble, and the number N of allowed preambles or a pair of configuration parameters for generating the preamble.

Based on the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the determining, by the network device, random access configuration information used by a small cell specifically includes:

the network equipment receives an initialization message sent by the small cell to request random access configuration information, and determines the random access configuration information used by the small cell in response to the initialization message;

the sending, by the network device, the determined random access configuration information to the user equipment of the small cell specifically includes:

the network equipment sends a random access resource configuration message to user equipment of the small cell, wherein the random access resource configuration message comprises random access configuration information allocated to the small cell for use.

Based on the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner, the determining, by the network device, random access configuration information used by a small cell specifically includes:

the network equipment receives a random access resource configuration updating request message sent by the small cell, wherein the random access resource configuration updating request message comprises the coverage area or load change information of the small cell;

updating the random access configuration information used by the small cell in response to the random access resource configuration update request message;

and the network equipment sends a random access resource configuration updating message to the user equipment of the small cell, wherein the random access resource configuration updating message comprises the updated random access configuration information used by the small cell.

Based on the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the random access resource configuration update request message includes change information of a coverage area or a load of the small cell; or,

the random access resource configuration update request message includes a request to increase or decrease a random access resource configured to the small cell.

Based on the first aspect or the first possible implementation manner of the first aspect, in a fifth possible implementation manner, the determining, by the network device, random access configuration information used by a small cell specifically includes:

the network device sends a measurement configuration message to the user equipment of the small cell or the user equipment served by the network device, wherein the measurement configuration message is used for indicating the user equipment to carry out neighbor cell measurement and acquiring random access configuration information used by a neighbor small cell of the small cell;

receiving random access configuration information used by a neighbor small cell measured by the user equipment and sent by the user equipment;

if the fact that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighbor small cell is determined, the random access configuration information used by the small cell is adjusted;

and the network equipment sends a random access configuration information adjustment message to the user equipment of the small cell, wherein the random access configuration information adjustment message comprises the adjusted random access configuration information used by the small cell.

Based on the first aspect or the first possible implementation manner of the first aspect, in a sixth possible implementation manner, the determining, by the network device, random access configuration information used by a small cell specifically includes:

the network equipment sends a request message to a neighbor small cell of the small cell, wherein the request message is used for requesting to acquire random access configuration information used by the neighbor small cell;

respectively receiving random access configuration information used by the corresponding neighbor small cells and sent by the neighbor small cells according to the request message;

determining random access configuration information used by the small cell, the random access configuration information used by the small cell being different from the random access configuration information used by the neighbor small cell.

Based on the first aspect or the first possible implementation manner of the first aspect, in a seventh possible implementation manner, after the network device sends the determined random access configuration information to the user equipment of the small cell, the method includes:

if the network device determines that the user equipment does not need to perform uplink synchronization or random access during access, the network device configures the determined random access configuration information as an empty set, and/or configures the number of usable preambles in the random access configuration information to be 0, and/or configures the size of a usable preamble group a in the random access configuration information to be 0, and configures a usable preamble group B in the random access configuration information to be an empty set, and transmits the random access configuration information configured as an empty set and/or the random access configuration information with the number of usable preambles configured as 0 and/or the random access configuration information with the size of a usable preamble group a to be 0 and the random access configuration information with the usable preamble group B as an empty set to the user equipment, so that the user equipment configures the random access configuration information configured as an empty set and/or the number of usable preambles configured as 0 according to the user equipment And random access configuration information and/or random access configuration information that the size of the usable preamble group A is 0 and the usable preamble group B is a null set, ignoring random access, and accessing the small cell by using a timing advance TA equal to 0 or using a TA value currently used by the user equipment.

Based on the first aspect and any one of the first to sixth possible implementation manners of the first aspect, in an eighth possible implementation manner, the network device includes a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

In a second aspect, the present invention provides a method for allocating random access resources, which is applied in a small cell network, and includes:

the user equipment of the small cell receives random access configuration information sent by network equipment, wherein the random access configuration information comprises preamble code information and physical random access channel information, or comprises configuration information used for generating a preamble code;

the user equipment performs random access to the small cell according to the preamble information and the physical random access channel information, or generates a preamble according to the configuration information for generating the preamble, and performs random access to the small cell using the generated preamble.

In a first possible implementation manner, based on the second aspect, the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, the root sequence for generating the preamble, and the number N of allowed preambles or a pair of configuration parameters for generating the preamble.

Based on the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the random access configuration information determines, for the network device, random access configuration information used by the small cell;

the receiving, by the user equipment of the small cell, the random access configuration information sent by the network equipment specifically includes:

the user equipment of the small cell receives a random access resource configuration message sent by the network equipment, wherein the random access resource configuration message comprises random access configuration information which is allocated to the small cell by the network equipment for use;

or

And the user equipment of the small cell receives a random access resource configuration updating message sent by the network equipment, wherein the random access resource configuration updating message comprises the updated random access configuration information used by the small cell.

Based on the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner, before the receiving, by the user equipment of the small cell, the random access configuration information sent by the network equipment, the method includes:

the user equipment receives a measurement configuration message sent by the network equipment, wherein the measurement configuration message is used for indicating the user equipment to carry out neighbor cell measurement;

responding to the measurement configuration message to carry out neighbor cell measurement, and acquiring random access configuration information used by a neighbor small cell of the small cell;

sending, to the network device, random access configuration information used by the neighbor small cell.

Based on the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the receiving, by the user equipment of the small cell, the random access configuration information sent by the network equipment specifically includes:

and the user equipment of the small cell receives a random access configuration information adjustment message sent by the network equipment, wherein the random access configuration information adjustment message comprises the adjusted random access configuration information used by the small cell.

In a fifth possible implementation manner, based on the second aspect or the first possible implementation manner of the second aspect, after the receiving, by the user equipment of the small cell, the random access configuration information sent by the network equipment, the method includes:

if the user equipment determines that the random access configuration information sent by the network equipment is a null set and/or the number of the lead codes N is equal to 0 and/or the size of the usable lead code group A is 0 and the usable lead code group B is a null set, the user equipment determines that uplink synchronization or random access does not need to be executed during access, and uses the timing advance TA equal to 0 or uses the TA value currently used by the user equipment to access the small cell.

Based on the second aspect and any one of possible implementation manners of the first to fifth aspects of the second aspect, in a sixth possible implementation manner, the network device includes a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

In a third aspect, the present invention provides an apparatus for allocating random access resources, located on a network device side, for application in a small cell network, including:

a determining module, configured to determine random access configuration information used by a small cell, where the random access configuration information includes preamble information and physical random access channel information, or includes configuration information used to generate a preamble;

a sending module, configured to send the random access configuration information determined by the determining module to a user equipment of the small cell, so that the user equipment performs random access to the small cell according to the preamble information and physical random access channel information, or generates a preamble according to the configuration information for generating a preamble, and performs random access to the small cell using the generated preamble.

Based on the third aspect, in a first possible implementation manner, the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, the root sequence for generating the preamble, and the number N of allowed preambles or a pair of configuration parameters for generating the preamble.

Based on the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the determining module is specifically configured to receive an initialization message sent by the small cell to request random access configuration information, and determine, in response to the initialization message, random access configuration information used by the small cell;

the sending module is specifically configured to send a random access resource configuration message to the user equipment of the small cell, where the random access resource configuration message includes random access configuration information allocated to the small cell for use.

Based on the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner, the determining module is specifically configured to receive a random access resource configuration update request message sent by the small cell, where the random access resource configuration update request message includes change information of a coverage area or a load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell;

the sending module is specifically configured to send a random access resource configuration update message to the user equipment of the small cell, where the random access resource configuration update message includes updated random access configuration information used by the small cell.

Based on the third aspect or the first possible implementation manner of the third aspect, in a fourth possible implementation manner, the sending module is further configured to send a measurement configuration message to a user equipment of the small cell or a user equipment served by the network equipment, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement and acquire random access configuration information used by a neighbor small cell of the small cell;

the device further comprises:

a receiving module, configured to receive random access configuration information used by a neighboring small cell, where the random access configuration information is obtained by measurement of the user equipment and is sent by the user equipment;

the determining module is further configured to adjust the random access configuration information used by the small cell if it is determined that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighboring small cell;

the sending module is further configured to send a random access configuration information adjustment message to the user equipment of the small cell, where the random access configuration information adjustment message includes the adjusted random access configuration information used by the small cell.

Based on the third aspect or the first possible implementation manner of the third aspect, in a fifth possible implementation manner, the sending module is further configured to send a request message to a neighboring small cell of the small cell, where the request message is used to request to acquire random access configuration information used by the neighboring small cell;

the receiving module is further configured to receive, according to the request message, random access configuration information used by the corresponding neighbor small cells and sent by the neighbor small cells respectively;

the determining module is further configured to determine random access configuration information used by the small cell, where the random access configuration information used by the small cell is different from the random access configuration information used by the neighboring small cell.

Based on the third aspect or the first possible implementation manner of the third aspect, in a sixth possible implementation manner, the determining module is further configured to configure the determined random access configuration information as an empty set, and/or configure the number of usable preambles in the random access configuration information as 0, and/or configure the size of the usable preamble group a in the random access configuration information as 0, and configure the usable preamble group B in the random access configuration information as an empty set, and send the random access configuration information configured as an empty set and/or the random access configuration information configured with the number of usable preambles as 0 and/or the random access configuration information configured with the size of the usable preamble group a as 0 and the random access configuration information with the usable preamble group B as an empty set to the user equipment, if it is determined that the user equipment does not need to perform uplink synchronization or perform random access during access, and enabling the user equipment to access the small cell by using the TA value currently used by the user equipment or by using the TA value currently used by the user equipment, wherein the TA configuration information configured as a null set and/or the random access configuration information configured as 0 by the number of the usable lead codes and/or the random access configuration information configured as 0 by the size of the usable lead code group A and the random access configuration information configured as a null set by the usable lead code group B ignore the random access and are equal to 0.

Based on the third aspect and any one of possible implementation manners of the first to sixth aspects, in a second possible implementation manner, the network device includes a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

In a fourth aspect, the present invention provides an apparatus for allocating random access resources, located on a user equipment side, for application in a small cell network, including:

a receiving module, configured to receive random access configuration information sent by a network device, where the random access configuration information includes preamble information and physical random access channel information, or includes configuration information used to generate a preamble;

an access module, configured to perform random access to the small cell according to the preamble information and the physical random access channel information, or generate a preamble according to the configuration information for generating a preamble, and perform random access to the small cell using the generated preamble.

In a first possible implementation manner, the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, a root sequence for generating the preamble, and a number N of allowed preambles, or a pair of configuration parameters for generating the preamble.

Based on the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the random access configuration information determines, for the network device, random access configuration information used by the small cell;

the receiving module is specifically configured to receive a random access resource configuration message sent by the network device, where the random access resource configuration message includes random access configuration information allocated to the small cell for use;

or

The receiving module is specifically configured to receive a random access resource configuration update message sent by the network device, where the random access resource configuration update message includes updated random access configuration information used by the small cell.

Based on the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner, the receiving module is further configured to receive a measurement configuration message sent by the network device, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement;

the device further comprises:

an obtaining module, configured to perform neighboring cell measurement in response to the measurement configuration message received by the receiving module, and obtain random access configuration information used by a neighboring small cell of the small cell;

a sending module, configured to send, to the network device, the random access configuration information used by the neighboring small cell acquired by the acquiring module.

Based on the fourth aspect or the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the receiving module is specifically configured to receive a random access configuration information adjustment message sent by the network device, where the random access configuration information adjustment message includes adjusted random access configuration information used by the small cell.

Based on the fourth aspect, in a fifth possible implementation manner, the apparatus further includes:

a determining module, configured to determine that uplink synchronization is not required to be performed or random access is not required to be performed during access if it is determined that the random access configuration information sent by the network device is a null set and/or the number N of preambles is equal to 0 and/or the size of the available preamble group a is 0 and the available preamble group B is a null set;

the access module is configured to access the small cell using a timing advance TA equal to 0 or using a TA value currently used by the ue.

In a fifth aspect, the present invention provides a system for allocating random access resources, which is applied in a small cell network, and includes: a network device and a user equipment, the user equipment being located in the small cell network;

the network device includes the apparatus for allocating random access resources according to the third aspect, and specifically includes a macro base station, an access network device, a core network device, or a mobility management entity;

the user equipment includes the allocation apparatus of random access resources according to the fourth aspect.

Based on the fifth aspect, in a first possible implementation manner, the small cell is configured to send an initialization message to the network device, so that the network device determines, according to the initialization message, random access configuration information used by the small cell;

the small cell is further configured to send a random access resource configuration update request message to the network device, where the random access resource configuration update request message includes a coverage area or a load change condition of the small cell; and the network equipment updates the random access configuration information used by the small cell according to the random access resource configuration updating request message.

In a second possible implementation manner, based on the fifth aspect or the first possible implementation manner of the fifth aspect, the random access configuration information includes preamble information and physical random access channel information, or includes configuration information used to generate a preamble; the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, a root sequence for generating the preamble, and a number N of allowed preambles or a pair of configuration parameters for generating the preamble.

The embodiment of the invention determines the random access configuration information used by the small cell through the network equipment, so that the random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighbor small cell of the small cell, and the user equipment of the small cell can randomly access the small cell according to the determined random access configuration information. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart illustrating a method for allocating random access resources according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for allocating random access resources according to another embodiment of the present invention;

fig. 3 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention;

fig. 4 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention;

fig. 5 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention;

fig. 6 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a system for allocating random access resources according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the embodiment of the invention is applied to a small cell network, in particular to a scene of densely deploying small cells. The small cell corresponds to a small base station, and a macro base station corresponding to the macro cell may collectively serve the user equipment. The macro cell and the small cell provide services to the user equipment, respectively, for example, the macro cell may provide signaling and data services for the user equipment, and the small cell may provide data services for the user equipment.

The network equipment in the embodiment of the invention comprises a macro base station, a small base station of the small cell, access network equipment, core network equipment or a mobile management entity.

Fig. 1 is a flowchart illustrating a method for allocating random access resources according to an embodiment of the present invention, as shown in fig. 1, the method for allocating random access resources according to the embodiment may include:

101. the network equipment determines random access configuration information used by the small cell.

Since each small cell network is deployed by the user in the existing small cell network, there is no good network planning, and each small cell uses random access preamble (preamble) used by the existing LTE system out of order, the collision probability of the random access preamble between the small cells and between the small cell and the macro cell may be increased.

In order to solve the problem of the increased collision probability of the random access preamble between the small cells and between the small cell and the macro cell, the present embodiment employs the network device to control the random access configuration information used by the small cell, so that there is no collision between the random access configuration information used by the small cell and the random access configuration information used by the neighbor small cell or the macro cell of the small cell.

The random Access configuration information includes preamble information and Physical Random Access Channel (PRACH) information, or the random Access configuration information includes configuration information for generating a preamble;

the configuration information for generating the preamble comprises a root sequence for generating the preamble and a cyclic shift value, or comprises the root sequence for generating the preamble and the number N of the preambles allowed to be generated or used, wherein N is less than 64, or comprises a configuration parameter pair for generating the preamble; the configuration parameter pair for generating the preamble may specifically be a { root sequence, start cyclic shift, end cyclic shift } pair for generating the preamble.

102. And the network equipment transmits the determined random access configuration information to the user equipment of the small cell so as to enable the user equipment to perform random access to the small cell according to the preamble code information and the physical random access channel information, or generates a preamble code according to the configuration information for generating the preamble code, and performs random access to the small cell by using the generated preamble code.

Steps 101 and 102, when implemented in detail:

in an optional implementation manner of the present invention, the network device receives an initialization message sent by the small cell, and determines, according to the initialization message, random access configuration information used by the small cell;

the network equipment sends a random access resource configuration message to the small cell, wherein the random access resource configuration message comprises random access configuration information allocated to the small cell for use. The information transmitted by the small cell is also information transmitted by a base station corresponding to the small cell, i.e., a small base station.

In an optional implementation manner of the present invention, the network device receives a random access resource configuration update request message sent by the small cell, where the random access resource configuration update request message includes change information of a coverage area or a load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell;

the network equipment updates the random access configuration information used by the small cell according to the random access resource configuration updating request message;

and the network equipment sends a random access resource configuration updating message to the small cell, wherein the random access resource configuration updating message comprises the updated random access configuration information used by the small cell.

In an optional implementation manner of the present invention, the network device sends a measurement configuration message to the user equipment of the small cell or the user equipment served by the network device, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement, and acquire random access configuration information used by a neighbor small cell of the small cell;

according to the random access configuration information used by the neighbor small cell, if the fact that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighbor small cell is determined, the random access configuration information used by the small cell is adjusted;

and the network equipment sends a random access configuration information adjustment message to the small cell, wherein the random access configuration information adjustment message comprises the adjusted random access configuration information used by the small cell.

In an optional embodiment of the present invention, the network device may send a request message to a neighbor small cell of the small cell, where the request message is used to request to acquire random access configuration information used by the neighbor small cell;

receiving random access configuration information used by the neighbor small cell and sent by the neighbor small cell;

determining random access configuration information used by the small cell such that the random access configuration information used by the small cell is different from the random access configuration information used by the neighbor small cell.

In this embodiment, the network device may determine the configuration information used by the small cell to generate the preamble, so that the preamble generated by the user equipment of the small cell according to the configuration information sent by the network device to generate the preamble does not collide with the preamble used by the neighboring small cell or the macro cell, and therefore, the user equipment of the small cell may perform random access to the small cell according to the preamble generated by the configuration information sent by the network device to generate the preamble.

Further, in the existing small cell network, each small cell still occupies 64 preambles specified by the LTE system, while in practical application, the number of preambles used by the user equipment of the small cell in the random access process does not need 64 preambles, which causes waste of preamble resources and low utilization rate. In this embodiment, the number of preambles generated by the user equipment of the small cell according to the configuration information sent by the network equipment to generate the preambles is less than 64, so that the utilization rate of the preamble resources can be improved.

Specifically, the network device may configure a root sequence used by the small cell to generate the preamble and a cyclic shift value, so that the user equipment of the small cell generates N preambles according to the root sequence and the cyclic shift value, and N is less than 64; or

The network equipment can configure a root sequence for generating the preamble codes and the number N of the allowed preamble codes used by the small cell, wherein N is less than 64, so that the user equipment of the small cell generates N preamble codes according to the root sequence for generating the preamble codes and the number N of the allowed preamble codes; or

The network device may configure a { root sequence, start cyclic shift, end cyclic shift } pair used by the small cell to generate preambles, such that the user equipment of the small cell generates N preambles from the { root sequence, start cyclic shift, end cyclic shift } pair, and N is less than 64.

In an optional embodiment of the present invention, after step 102, if it is determined that the ue does not need to perform uplink synchronization or perform random access during access, the network device may configure the determined random access configuration information as an empty set, or configure the number N of usable preambles to be equal to 0, and send the random access configuration information configured as the empty set or the random access configuration information configuring the number N of usable preambles to be 0 to the ue of the small cell, so that the ue ignores random access according to the random access configuration information configured as the empty set or the random access configuration information configuring the number N of usable preambles to be 0, and uses a Timing Advance (TA) to be equal to 0 or uses a TA value currently used by the ue to access the small cell.

In the LTE protocol, currently, 64 random access preambles used by each cell are divided into a random access preamble group a and a random access preamble group B, and in an optional embodiment of the present invention, the network device may set the size (size) of the group random access preamble group a to 0 and set the random access preamble group B to an empty set, so that the user equipment directly accesses the small cell with TA equal to 0 according to the configuration information that the size of the preamble group a is 0 and the preamble group B is an empty set. The meaning of the preamble group a and the preamble group B can refer to the existing LTE wireless communication standard protocol, which is not described in this embodiment.

In the present invention, the empty set means that there is no corresponding configuration.

The method and the device determine the random access configuration information used by the small cell through the network equipment, so that the used random access configuration information of the small cell does not conflict with the random access configuration information used by a neighbor small cell or a macro cell of the small cell, and therefore user equipment of the small cell can randomly access the small cell according to the determined random access configuration information, or generate a lead code according to the determined random access configuration information, and use the generated lead code to execute random access to the small cell. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Further, according to the embodiment of the present invention, the random access configuration information determined by the network device enables the preamble generated by the small cell according to the random access configuration information to be smaller than 64 preambles specified in the existing LTE system, so that the utilization of the preamble is improved, and the problems of the waste of preamble resources and the low utilization rate in the existing small cell network are solved.

Fig. 2 is a flowchart illustrating a method for allocating random access resources according to an embodiment of the present invention, and as shown in fig. 2, the method for allocating random access resources according to the embodiment may include:

201. and the user equipment of the small cell receives the random access configuration information sent by the network equipment.

In order to solve the problem of the increased collision probability of the random access preamble codes between the small cells and between the small cell and the macro cell, the present embodiment employs the network device to control the random access configuration information used by the small cell, so that there is no collision between the random access configuration information used by the small cell and the random access configuration information used by the neighboring small cells of the small cell.

In an optional implementation manner of the present invention, the random access configuration information is random access configuration information used by the small cell, which is determined by the network device according to an initialization message sent by the small cell;

the user equipment of the small cell receives a random access resource configuration message sent by the network equipment, wherein the random access resource configuration message comprises random access configuration information allocated to the small cell for use;

in an optional implementation manner of the present invention, the random access configuration information is random access configuration information used by the small cell to be updated by the network device according to a random access resource configuration update request message sent by the small cell, where the random access resource configuration update request message includes change information of a coverage area or a load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell;

In an optional embodiment of the present invention, before the user equipment of the small cell receives the random access configuration information sent by the network equipment, the method includes:

measuring adjacent cells according to the measurement configuration message, and acquiring random access configuration information used by the neighbor small cells of the small cells;

sending random access configuration information used by the neighbor small cell to the network equipment; enabling the network equipment to adjust the random access configuration information used by the small cell if the fact that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighbor small cell is determined according to the random access configuration information used by the neighbor small cell;

202. And the user equipment performs random access to the small cell according to the preamble information and the physical random access channel information, or generates a preamble according to the configuration information for generating the preamble, and performs random access to the small cell by using the generated preamble.

In an optional embodiment of the present invention, after receiving the random access configuration information sent by the network device, the method includes:

The method comprises the steps that the network equipment determines the random access configuration information used by the small cell, so that the random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighbor small cell of the small cell, and the user equipment of the small cell can randomly access the small cell according to the determined random access configuration information, or generates a lead code according to the determined random access configuration information, and uses the generated lead code to execute random access to the small cell. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Fig. 3 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention; in this embodiment, the network device that determines the configuration information used by the small cell and used for generating the preamble is specifically a macro base station, as shown in fig. 3, the specific process includes:

301. and the small base station sends an initialization message to the macro base station.

The small base station is a base station that uses a high-frequency band carrier to perform a certain small coverage, and the coverage area of the small base station is generally referred to as a small cell.

302. And the macro base station allocates the configuration information for generating the lead code for the small base station according to the initialization message.

The configuration information for generating the preamble may include a root sequence for generating the preamble and a plurality of cyclic shift values; or generating a preamble root sequence and the number N of allowed preambles, wherein N is less than 64; or a { root sequence, start cyclic shift, end cyclic shift } pair that produces a preamble.

The configuration information allocated by the macro base station for the small base station to generate the preamble does not conflict with the configuration information used by the neighbor small cell of the small base station to generate the preamble.

303. The macro base station sends the allocated configuration information for generating the preamble to the small base station.

304. And the macro base station or the small base station sends configuration information used for generating the preamble to the user equipment.

Specifically, the macro base station or the small cell transmits configuration information for generating the preamble to the user equipment through a broadcast message or a dedicated message.

305. And the user equipment generates M lead codes according to the configuration information for generating the lead codes and carries out random access.

Wherein M is equal to the number of configured cyclic shift values or M is equal to the number N of configured random access preamble codes.

First, before accessing a small cell, a user equipment generates M preambles based on configuration information used to generate preambles and transmitted by a small base station, and then performs random access according to the M preambles.

It should be noted that, if the small cell determines that the ue does not need to perform uplink synchronization or perform random access when accessing, the ue may configure the cyclic shift value as an empty set, that is, not configure the cyclic shift value, and when determining that the small cell does not configure the cyclic shift value, the ue ignores the random access and accesses the small cell using TA =0 or using the TA value currently used by the ue.

It should be noted that, if the small cell determines that the ue does not need to perform uplink synchronization or perform random access when accessing, the number of preambles N =0 may be configured, and the ue ignores the random access according to the number of preambles N =0 and accesses the small cell using TA =0 or using the TA value currently used by the ue.

It should be noted that, before accessing the small cell, if it is determined that the starting cyclic shift included in the { root sequence, starting cyclic shift, ending cyclic shift } pair generating the preamble is greater than or equal to the ending cyclic shift value, the user equipment may ignore the random access and access the small cell using TA =0 or the currently used TA value.

It should be noted that, when the coverage area or the load of the small cell changes, the small base station may send an information update message to the macro base station, and request the macro base station to update the number of the preambles allowed to be used by the small base station; and the macro base station updates the number of the lead codes which can be used by the small base station according to the information updating message sent by the small base station. Specifically, the macro base station may send the updated configuration information to generate the preamble to the small cell. Correspondingly, the small cell informs the updated configuration information for generating the preamble to the user equipment by means of a broadcast message or a dedicated message. Alternatively, the macro base station may directly send the updated configuration information for generating the preamble to the user equipment through a broadcast message or a dedicated message.

It should be noted that, assuming that the macro base station can directly know that the coverage area or the load of the small cell changes, the macro base station can directly update the number of the preambles that can be used by the small cell according to the change in the coverage area or the load of the small cell, that is, update the configuration information that can be used by the small base station and used for generating the preambles.

It should be noted that, based on the existing LTE protocol, the macro base station may set the size of group a of the preamble of the small cell to be 0, and does not configure group B, so that if the user equipment determines that the size of group a of the preamble is 0 and does not configure group B, the user equipment directly accesses the small cell by using TA = 0.

The method and the device for the small cell access determination comprise the step that the macro base station determines the configuration information used by the small cell and used for generating the lead codes, so that the lead codes generated by the small cell according to the configuration information used for generating the lead codes do not collide with the lead codes used by the neighbor small cells of the small cell, and the user equipment of the small cell can randomly access the small cell according to the generated lead codes. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Further, the macro base station determines the configuration information used by the small cell to generate the preamble, so that the preamble generated by the small cell according to the configuration information used to generate the preamble is smaller than 64 preambles specified by the existing LTE system, the utilization of the preamble is improved, and the problems of waste of preamble resources and low utilization rate in the existing small cell network are solved.

Fig. 4 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention; in this embodiment, the network device that determines the random access configuration information used by the small cell is specifically a macro base station, and as shown in fig. 4, the specific process includes:

401. and the small base station sends an initialization message to the macro base station.

Specifically, after the small cell is powered on or initialized, an initialization message is sent to the macro base station, where the initialization message is used to request the macro base station to allocate random access configuration information to the small cell.

402. And the macro base station distributes random access configuration information for the small base station according to the initialization message.

The random access configuration information includes a preamble and PRACH information.

The assigned preamble may be the same as or different from the preamble used by the macro base station.

The distributed PRACH information does not conflict with PRACH information used by the macro base station and PRACH information used by a neighbor small cell of the small base station.

403. And the macro base station sends the random access configuration information to the small base station.

Alternatively, the macro base station may directly send the random access configuration information to the user equipment of the small cell.

404. And the small base station sends the random access configuration information allocated by the macro base station to the user equipment.

Specifically, the small cell may notify the user equipment of the random access configuration information available to the user equipment through a broadcast message or a dedicated message.

405. And the user equipment randomly accesses the small cell according to the random access configuration information.

It should be noted that, if the random access configuration information is an empty set, the user equipment ignores the random access, and accesses the small cell using TA =0 or the currently used TA value.

It should be noted that, when the coverage area or the load of the small cell changes, the small base station may send an information update message to the macro base station to request the macro base station to update the random access configuration information for the small base station. The macro base station updates the random access configuration information which can be used by the small base station according to the information updating message, and sends the updated random access configuration information to the small base station; optionally, the macro base station may send the updated random access configuration information to the user equipment of the small cell directly through a broadcast message or a dedicated message.

In the embodiment of the invention, the macro base station determines the random access configuration information used by the small cell, so that the random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighbor small cell of the small cell, and the user equipment of the small cell can randomly access the small cell according to the determined random access configuration information. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Fig. 5 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention; in this embodiment, the network device that determines the random access configuration information used by the small cell is specifically a macro base station, and as shown in fig. 5, the specific process includes:

501. and the user equipment of the small cell receives the measurement configuration message sent by the macro base station.

Wherein the measurement configuration message indicates the ue to assist in acquiring the random access configuration information.

502. And the user equipment carries out neighbor cell measurement according to the measurement configuration message and acquires the random access configuration information used by the neighbor small cell.

503. And the user equipment sends the acquired random access configuration information used by the neighbor small cell to the macro base station.

Specifically, the user equipment may simultaneously send the random access configuration information used by the neighbor small cell to the macro base station when performing measurement report reporting.

504. And the macro base station determines that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighbor small cell according to the random access configuration information used by the neighbor small cell.

505. And the macro base station adjusts the random access configuration information used by the small cell, so that the adjusted random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighbor small cell.

506. And the macro base station sends the adjusted random access configuration information used by the small cell to the user equipment of the small cell.

The macro base station may further send the adjusted random access configuration information used by the small cell to the small base station of the small cell, and the small base station sends the adjusted random access configuration information used by the small cell to the user equipment of the small cell.

507. And the user equipment randomly accesses the small cell by using the adjusted random access configuration information.

Optionally, after step 504, the macro base station may further adjust the random access configuration information used by the neighbor small cell, so that there is no collision between the random access configuration information used by the neighbor small cell and the random access configuration information used by the small cell.

The embodiment of the invention assists the macro base station to acquire the random access configuration information used by the neighbor small cell of the small cell through the user equipment of the small cell, the macro base station determines whether the random access configuration information used by the small cell is not in conflict with the random access configuration information used by the neighbor small cell of the small cell according to the random access configuration information used by the neighbor small cell, and if the random access configuration information used by the small cell is in conflict, the random access configuration information used by the small cell after being adjusted is not in conflict with the random access configuration information used by the neighbor small cell of the small cell. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Fig. 6 is a signaling diagram of a method for allocating random access resources according to another embodiment of the present invention; in this embodiment, the network device that determines the random access configuration information used by the small cell is specifically a small base station, and as shown in fig. 6, the specific flow includes:

601. the small cell base station acquires the random access configuration information used by the neighbor small cells of the small cell.

Specifically, for example, when the small cell is initialized, the small cell may perform discovery or detection on neighbor cells through a frequency sweep signal, so as to acquire random access configuration information used by neighboring neighbor small cells, where the random access configuration information includes a preamble and PRACH information.

For another example, when the small cell base station of the small cell is initialized, it requests to acquire the random access configuration information used by the neighboring small cell by broadcasting a message to the neighboring small cell, and the small cell base stations corresponding to the neighboring small cells respectively transmit the random access configuration information used by the neighboring small cells to the small cell base stations of the small cells according to the broadcast message.

602. And the small base station determines the random access configuration information used by the small cell according to the random access configuration information used by the neighbor small cell.

Wherein the determined random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighboring small cell.

603. And the small base station transmits the determined random access configuration information used by the small cell to the user equipment of the small cell.

For example, the small cell base station may broadcast the information of the determined random access configuration information used by the small cell to the user equipment of the small cell through a broadcast message or a dedicated message.

604. And the user equipment randomly accesses the small cell according to the random access configuration information sent by the small base station.

In the embodiment of the invention, the random access configuration information used by the neighbor small cell of the small cell is obtained by the small base station of the small cell, and the random access configuration information used by the small cell is determined according to the random access configuration information used by the neighbor small cell, so that the random access configuration information used by the small cell does not conflict with the random access configuration information used by the neighbor small cell. Therefore, it is possible to solve a problem that each small cell increases the collision probability of random access preambles between small cells and between the small cell and the macro cell because random access preambles (preambles) used by the existing LTE system are used out of order.

Fig. 7 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention; the method is located on a network device side, and is applied to a small cell network, as shown in fig. 7, and includes:

a determining module 71, configured to determine random access configuration information used by the small cell, where the random access configuration information includes preamble information and physical random access channel information, or includes configuration information used to generate a preamble;

a sending module 72, configured to send the random access configuration information determined by the determining module to a user equipment of the small cell, so that the user equipment performs random access to the small cell according to the preamble information and the physical random access channel information, or generates a preamble according to the configuration information for generating a preamble, and performs random access to the small cell using the generated preamble.

For example, the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, a root sequence for generating the preamble, and a number N of allowed preambles or a pair of configuration parameters for generating the preamble.

For example, the determining module 71 is specifically configured to receive an initialization message sent by the small cell to request random access configuration information, and determine, in response to the initialization message, random access configuration information used by the small cell;

the sending module 72 is specifically configured to send a random access resource configuration message to the user equipment of the small cell, where the random access resource configuration message includes random access configuration information allocated to the small cell for use.

For example, the determining module 71 is specifically configured to receive a random access resource configuration update request message sent by the small cell, where the random access resource configuration update request message includes information of a change in coverage or load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell; updating the random access configuration information used by the small cell according to the random access resource configuration updating request message;

the sending module 72 is specifically configured to send a random access resource configuration update message to the user equipment of the small cell, where the random access resource configuration update message includes updated random access configuration information used by the small cell.

For example, the sending module 72 is further configured to send a measurement configuration message to the user equipment of the small cell or the user equipment served by the network equipment, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement and acquire random access configuration information used by a neighbor small cell of the small cell;

the device further comprises:

a receiving module 73, configured to receive random access configuration information used by a neighboring small cell, where the random access configuration information is obtained by measurement of the user equipment and sent by the user equipment;

the determining module 71 is further configured to adjust the random access configuration information used by the small cell if it is determined that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighboring small cell;

the sending module 72 is further configured to send a random access configuration information adjustment message to the user equipment of the small cell, where the random access configuration information adjustment message includes the adjusted random access configuration information used by the small cell.

For example, the sending module 72 is further configured to send a request message to a neighboring small cell of the small cell, where the request message is used to request to acquire the random access configuration information used by the neighboring small cell;

the receiving module 73 is further configured to receive, according to the request message, random access configuration information that the neighboring small cell transmits to a corresponding neighboring small cell;

the determining module 71 is further configured to determine the random access configuration information used by the small cell, so that the random access configuration information used by the small cell is different from the random access configuration information used by the neighboring small cell.

For example, the determining module 71 is further configured to configure the determined random access configuration information as an empty set, and/or configure the number of usable preambles in the random access configuration information as 0, and/or configure the size of the usable preamble group a in the random access configuration information as 0, and configure the usable preamble group B in the random access configuration information as an empty set, and send the random access configuration information configured as an empty set and/or the random access configuration information whose number of usable preambles is configured as 0, and/or the random access configuration information whose size of the usable preamble group a is 0 and whose usable preamble group B is an empty set to the user equipment, so that the user equipment sends the user equipment to the user equipment according to the random access configuration information configured as an empty set and/or the random access configuration information configured as a usable preamble set Random access configuration information with code number configured as 0 and/or random access configuration information with usable preamble group A of size 0 and usable preamble group B as a null set, ignoring random access, and accessing the small cell using timing advance TA equal to 0 or using TA value currently used by the user equipment.

Fig. 8 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention; the method is located on a user equipment side, and is applied to a small cell network, as shown in fig. 8, and includes:

a receiving module 81, configured to receive random access configuration information sent by a network device, where the random access configuration information includes preamble information and physical random access channel information, or includes configuration information used to generate a preamble;

an access module 82, configured to perform random access to the small cell according to the preamble information and the physical random access channel information, or generate a preamble according to the configuration information for generating a preamble, and perform random access to the small cell using the generated preamble.

For example, the random access configuration information determines, for the network device, random access configuration information used by the small cell;

the receiving module 81 is specifically configured to receive a random access resource configuration message sent by the network device, where the random access resource configuration message includes random access configuration information allocated to the small cell for use;

or

The receiving module 81 is specifically configured to receive a random access resource configuration update message sent by the network device, where the random access resource configuration update message includes updated random access configuration information used by the small cell.

For example, the receiving module 81 is further configured to receive a measurement configuration message sent by the network device, where the measurement configuration message is used to instruct the ue to perform neighbor cell measurement;

the device further comprises:

an obtaining module 83, configured to perform neighboring cell measurement in response to the measurement configuration message received by the receiving module 81, and obtain random access configuration information used by a neighboring small cell of the small cell;

a sending module 84, configured to send, to the network device, the random access configuration information used by the neighboring small cell acquired by the acquiring module 83.

For example, the receiving module 81 is specifically configured to receive a random access configuration information adjustment message sent by the network device, where the random access configuration information adjustment message includes the adjusted random access configuration information used by the small cell.

For example, the device also includes:

a determining module 85, configured to determine that uplink synchronization is not required to be performed or random access is not required to be performed during access if it is determined that the random access configuration information sent by the network device is a null set and/or the number N of preambles is equal to 0 and/or the size of the available preamble group a is 0 and the available preamble group B is a null set;

the access module 82 is configured to access the small cell using a timing advance TA equal to 0 or using a TA value currently used by the ue.

Fig. 9 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention; specifically, a network device is applied to a small cell network, as shown in fig. 9, and includes: the processor is connected with the memory through the communication bus, and the memory stores instructions for realizing the allocation method of the random access resources; further, the communication system also comprises a communication interface, and the communication interface is used for being in communication connection with other network element equipment (such as user equipment).

When the processor calls the instructions in the memory, the following steps may be performed:

determining random access configuration information used by a small cell, wherein the random access configuration information comprises preamble code information and physical random access channel information or configuration information used for generating a preamble code;

transmitting the determined random access configuration information to user equipment of the small cell to enable the user equipment to perform random access to the small cell according to the preamble code information and physical random access channel information, or generating a preamble code according to the configuration information for generating the preamble code, and performing random access to the small cell by using the generated preamble code.

For example, the determining the random access configuration information used by the small cell specifically includes:

receiving an initialization message sent by the small cell to request random access configuration information, and determining the random access configuration information used by the small cell in response to the initialization message;

sending the determined random access configuration information to the user equipment of the small cell, specifically including:

sending a random access resource configuration message to user equipment of the small cell, the random access resource configuration message comprising random access configuration information allocated for use by the small cell.

For example, determining the random access configuration information used by the small cell specifically includes:

receiving a random access resource configuration update request message sent by the small cell, wherein the random access resource configuration update request message contains the change information of the coverage area or the load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell;

updating the random access configuration information used by the small cell according to the random access resource configuration updating request message;

sending a random access resource configuration update message to user equipment of the small cell, where the random access resource configuration update message includes updated random access configuration information used by the small cell.

sending a measurement configuration message to the user equipment of the small cell or the user equipment served by the network equipment, wherein the measurement configuration message is used for indicating the user equipment to carry out neighbor cell measurement and acquiring random access configuration information used by a neighbor small cell of the small cell;

and sending a random access configuration information adjustment message to the user equipment of the small cell, wherein the random access configuration information adjustment message comprises the adjusted random access configuration information used by the small cell.

sending a request message to a neighbor small cell of the small cell, wherein the request message is used for requesting to acquire random access configuration information used by the neighbor small cell;

For example, after sending the determined random access configuration information to the user equipment of the small cell, the method includes:

if it is determined that the ue does not need to perform uplink synchronization or perform random access during access, configuring the determined random access configuration information as an empty set, and/or configuring the number of usable preambles in the random access configuration information as 0, and/or configuring the size of a usable preamble group a in the random access configuration information as 0, and configuring a usable preamble group B in the random access configuration information as an empty set, and transmitting the random access configuration information configured as an empty set and/or the random access configuration information whose number of usable preambles is configured as 0 and/or the random access configuration information whose size of a usable preamble group a is 0 and whose usable preamble group B is an empty set to the ue, so that the ue configures the random access configuration information configured as an empty set and/or the random access configuration information whose number of usable preambles is configured as 0 according to the ue Information and/or random access configuration information that the size of the usable preamble group a is 0 and the usable preamble group B is a null set, ignoring random access, and accessing the small cell using a timing advance TA equal to 0 or using a TA value currently used by the user equipment.

Fig. 10 is a schematic structural diagram of an apparatus for allocating random access resources according to another embodiment of the present invention, specifically, a user equipment, located in a small cell network, as shown in fig. 10, including: the processor is connected with the memory through the communication bus, and the memory stores instructions for realizing the allocation method of the random access resources; further, the network device also comprises a communication interface, and the communication interface is used for being in communication connection with other network element devices (such as network devices).

receiving random access configuration information sent by network equipment, wherein the random access configuration information comprises lead code information and physical random access channel information, or comprises configuration information used for generating the lead code;

performing random access to the small cell according to the preamble information and physical random access channel information, or generating a preamble according to the configuration information to generate a preamble, and performing random access to the small cell using the generated preamble.

receiving random access configuration information sent by a network device, specifically including:

receiving a random access resource configuration message sent by the network equipment, wherein the random access resource configuration message comprises random access configuration information which is allocated to the small cell by the network equipment for use;

or

And receiving a random access resource configuration update message sent by the network equipment, wherein the random access resource configuration update message comprises the updated random access configuration information used by the small cell.

For example, before receiving the random access configuration information sent by the network device, the method includes:

receiving a measurement configuration message sent by the network device, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement;

For example, receiving the random access configuration information sent by the network device specifically includes:

and receiving a random access configuration information adjustment message sent by the network equipment, wherein the random access configuration information adjustment message comprises the adjusted random access configuration information used by the small cell.

For example, after receiving the random access configuration information sent by the network device, the method includes:

if it is determined that the random access configuration information sent by the network device is a null set and/or the number N of preambles is equal to 0 and/or the size of the available preamble group a is 0 and the available preamble group B is a null set, it is determined that uplink synchronization or random access does not need to be performed during access, and a timing advance TA is equal to 0 or a TA value currently used by the user equipment is used to access the small cell.

Fig. 11 is a schematic structural diagram of a system for allocating random access resources according to another embodiment of the present invention, which is applied to a small cell network, and as shown in fig. 11, the system includes: a network device 10 and a user equipment 11, the user equipment 11 being located in a small cell 12;

the network device 10 includes the allocation apparatus for random access resources according to the embodiment shown in fig. 7, and specifically includes a macro base station, an access network device, a core network device, or a mobility management entity;

the user equipment 11 includes an allocation apparatus of random access resources according to the embodiment shown in fig. 8.

For example, the small cell 12 is configured to send an initialization message to the network device, so that the network device determines, according to the initialization message, random access configuration information used by the small cell;

the small cell 12 is further configured to send a random access resource configuration update request message to the network device, where the random access resource configuration update request message includes a coverage area or a load change condition of the small cell; and the network equipment updates the random access configuration information used by the small cell according to the random access resource configuration updating request message.

For example, the random access configuration information includes preamble information and physical random access channel information, or includes configuration information for generating a preamble; the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, a root sequence for generating the preamble, and a number N of allowed preambles or a pair of configuration parameters for generating the preamble.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium in the form of a code. The code is stored in a computer readable storage medium and includes instructions for causing a processor or hardware circuitry to perform some or all of the steps of the methods described in the various embodiments of the invention. And the aforementioned storage medium includes: a micro high-capacity removable Memory disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, which do not need a physical drive, and the like, of the usb interface.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for allocating random access resources, applied to a small cell network, is characterized by comprising:

the network equipment transmits the random access configuration information to user equipment of the small cell, so that the user equipment performs random access to the small cell according to the preamble code information and physical random access channel information, or generates a preamble code according to the configuration information for generating the preamble code, and performs random access to the small cell by using the generated preamble code;

the determining, by the network device, the random access configuration information used by the small cell specifically includes:

the network device sends a measurement configuration message to the user equipment of the small cell or the user equipment served by the network device, wherein the measurement configuration message is used for indicating the user equipment to carry out neighbor cell measurement and acquiring random access configuration information used by a neighbor small cell of the small cell; receiving random access configuration information used by a neighbor small cell measured by the user equipment and sent by the user equipment; if the fact that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighbor small cell is determined, the random access configuration information used by the small cell is adjusted; or,

the network equipment sends a request message to a neighbor small cell of the small cell, wherein the request message is used for requesting to acquire random access configuration information used by the neighbor small cell; receiving random access configuration information used by the neighbor small cell and sent by the neighbor small cell; determining random access configuration information used by the small cell, the random access configuration information used by the small cell being different from the random access configuration information used by the neighbor small cell.

2. The method of claim 1, wherein the configuration information for generating the preamble comprises a root sequence and a cyclic shift value of the generated preamble, the root sequence and the number N of allowed preambles, or a pair of configuration parameters for generating the preamble.

3. The method according to claim 1 or 2, wherein the determining, by the network device, the random access configuration information used by the small cell specifically comprises:

the network equipment sends a random access resource configuration message to user equipment of the small cell, wherein the random access resource configuration message comprises random access configuration information used by the small cell.

4. The method according to claim 1 or 2, wherein the determining, by the network device, the random access configuration information used by the small cell specifically comprises:

the network equipment receives a random access resource configuration updating request message sent by the small cell;

5. The method of claim 4, comprising:

the random access resource configuration update request message contains the change information of the coverage or load of the small cell; or,

6. The method according to claim 1 or 2, wherein when the network device determines that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighboring small cell and adjusts the random access configuration information used by the small cell, the network device sends the determined random access configuration information to the user equipment of the small cell, specifically comprising:

7. The method according to claim 1 or 2, wherein the network device sends the determined random access configuration information to the user equipment of the small cell, and comprises:

8. The method of claim 1 or 2, wherein the network device comprises a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

9. A method for allocating random access resources, applied to a small cell network, is characterized by comprising:

the user equipment performs random access to the small cell according to the preamble information and physical random access channel information, or generates a preamble according to the configuration information for generating the preamble, and performs random access to the small cell using the generated preamble;

before the user equipment of the small cell receives the random access configuration information sent by the network equipment, the method includes:

10. The method of claim 9, wherein the configuration information for generating the preamble comprises a root sequence and a cyclic shift value for generating the preamble, a root sequence and a number N of allowed preambles for generating the preamble, or a pair of configuration parameters for generating the preamble.

11. The method according to claim 9 or 10, wherein the random access configuration information determines, for the network device, random access configuration information used by the small cell;

or

12. The method according to claim 9, wherein the receiving, by the user equipment of the small cell, the random access configuration information sent by the network equipment specifically includes:

13. The method according to claim 9 or 10, wherein after the user equipment of the small cell receives the random access configuration information sent by the network equipment, the method comprises:

14. The method of claim 9 or 10, wherein the network device comprises a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

15. An apparatus for allocating random access resources, located on a network device side, for use in a small cell network, comprising:

a transmission module, configured to transmit the random access configuration information determined by the determination module to a user equipment of the small cell, so that the user equipment performs random access to the small cell according to the preamble information and physical random access channel information, or generates a preamble according to the configuration information for generating a preamble, and performs random access to the small cell using the generated preamble;

the sending module is further configured to send a measurement configuration message to the user equipment of the small cell or the user equipment served by the network equipment, where the measurement configuration message is used to instruct the user equipment to perform neighboring cell measurement and acquire random access configuration information used by a neighboring small cell of the small cell; a receiving module, configured to receive random access configuration information used by a neighboring small cell, where the random access configuration information is obtained by measurement of the user equipment and is sent by the user equipment; the determining module is further configured to adjust the random access configuration information used by the small cell if it is determined that the random access configuration information used by the small cell conflicts with the random access configuration information used by the neighboring small cell;

or,

the sending module is further configured to send a request message to a neighboring small cell of the small cell, where the request message is used to request to acquire random access configuration information used by the neighboring small cell; the receiving module is further configured to receive, according to the request message, random access configuration information used by the corresponding neighbor small cells and sent by the neighbor small cells respectively; the determining module is further configured to determine random access configuration information used by the small cell, where the random access configuration information used by the small cell is different from the random access configuration information used by the neighboring small cell.

16. The apparatus of claim 15, wherein the configuration information for generating the preamble comprises a root sequence and a cyclic shift value for generating the preamble, a root sequence and a number N of allowed preambles for generating the preamble, or a pair of configuration parameters for generating the preamble.

17. The apparatus according to claim 15 or 16, wherein the determining module is specifically configured to receive an initialization message sent by the small cell to request random access configuration information, and determine, in response to the initialization message, random access configuration information used by the small cell;

18. The apparatus according to claim 15 or 16, wherein the determining module is specifically configured to receive a random access resource configuration update request message sent by the small cell, where the random access resource configuration update request message includes information about a coverage area or a load of the small cell; or, the random access resource configuration update request message includes a request for increasing or decreasing the random access resource configured to the small cell;

19. The apparatus according to claim 15 or 16, wherein when the determining module adjusts the random access configuration information used by the small cell, the transmitting module is further configured to transmit a random access configuration information adjustment message to the user equipment of the small cell, where the random access configuration information adjustment message includes the adjusted random access configuration information used by the small cell.

20. The apparatus of claim 15 or 16, wherein the determining module is further configured to configure the determined random access configuration information as an empty set, and/or configure the number of usable preambles in the random access configuration information as 0, and/or configure the size of the usable preamble group a in the random access configuration information as 0, and configure the usable preamble group B in the random access configuration information as an empty set, and send the random access configuration information configured as an empty set and/or the random access configuration information configured with the number of usable preambles as 0 and/or the random access configuration information configured with the usable preamble group a as 0 and the random access configuration information configured with the usable preamble group B as an empty set to the user equipment, if it is determined that the user equipment does not need to perform uplink synchronization or perform random access during access, and enabling the user equipment to access the small cell by using the TA value currently used by the user equipment or by using the TA value currently used by the user equipment, wherein the TA configuration information configured as a null set and/or the random access configuration information configured as 0 by the number of the usable lead codes and/or the random access configuration information configured as 0 by the size of the usable lead code group A and the random access configuration information configured as a null set by the usable lead code group B ignore the random access and are equal to 0.

21. The apparatus of claim 15 or 16, wherein the network device comprises a macro base station, a small base station of the small cell, an access network device, a core network device, or a mobility management entity.

22. An apparatus for allocating random access resources, located on a user equipment side, for use in a small cell network, comprising:

an access module for performing random access to the small cell according to the preamble information and physical random access channel information, or generating a preamble according to the configuration information for generating a preamble, and performing random access to the small cell using the generated preamble;

the receiving module is further configured to receive a measurement configuration message sent by the network device, where the measurement configuration message is used to instruct the user equipment to perform neighbor cell measurement;

23. The apparatus of claim 22, wherein the configuration information for generating the preamble comprises a root sequence and a cyclic shift value for generating the preamble, a root sequence and a number N of allowed preambles for generating the preamble, or a pair of configuration parameters for generating the preamble.

24. The apparatus according to claim 22 or 23, wherein the random access configuration information determines, for the network device, random access configuration information used by the small cell;

or

25. The apparatus of claim 22, wherein the receiving module is specifically configured to receive a random access configuration information adjustment message sent by the network device, where the random access configuration information adjustment message includes the adjusted random access configuration information used by the small cell.

26. The apparatus of claim 22, further comprising:

27. A system for allocating random access resources, applied to a small cell network, includes: a network device and a user equipment, the user equipment being located in the small cell network;

the network device comprises the apparatus for allocating random access resources according to any of claims 15 to 21, specifically comprising a macro base station, an access network device, a core network device, or a mobility management entity;

the user equipment comprises an allocation apparatus of random access resources according to any of claims 22-26.

28. The system of claim 27, wherein the small cell is configured to send an initialization message to the network device, so that the network device determines, according to the initialization message, random access configuration information used by the small cell;

29. The system according to claim 27 or 28, wherein the random access configuration information comprises preamble information and physical random access channel information, or comprises configuration information for generating a preamble; the configuration information for generating the preamble includes a root sequence and a cyclic shift value for generating the preamble, a root sequence for generating the preamble, and a number N of allowed preambles or a pair of configuration parameters for generating the preamble.