WO2014008845A1

WO2014008845A1 - Method, system and device for accessing cell

Info

Publication number: WO2014008845A1
Application number: PCT/CN2013/079026
Authority: WO
Inventors: 赵亚利; 鲍炜; 梁靖
Original assignee: 电信科学技术研究院
Priority date: 2012-07-13
Filing date: 2013-07-09
Publication date: 2014-01-16
Also published as: CN103546980B; CN103546980A

Abstract

The embodiments of the present application relate to the technical field of wireless communications, and in particular, to a method, system and device for accessing a cell, which are used for solving the problem of relatively long time delay brought about by random access when a micro-cell is accessed in the prior art. The method for accessing a cell provided in the embodiments of the present application includes: a network-side device determining the cell type of a cell which user equipment needs to access; and the network-side device notifying the cell type of the cell which the user equipment needs to access, for notifying the user equipment to judge whether a random access process needs to be executed according to the cell type. Since a network-side device notifies the type of a cell which user equipment accesses, the embodiments of the present application allow that the user equipment does not need uplink synchronization when accessing a micro-cell, shortening the time delay brought about by random access.

Description

Method, system and device for accessing a cell This application claims to be submitted to the Chinese Patent Office on July 13, 2012, the application number is 201210243781.8, and the Chinese patent entitled "Method, System and Equipment for Cell Access" Priority of the application, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for cell access. Background technique

As shown in Figure 1, in the network architecture diagram of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system of Long Term Evolution (LTE) evolution, the mobility management entity (Mobility Management Entity) The MME and the evolved base station (e B ) are connected by the S 1-MME interface, and the eNBs are connected through the X2 port, and the base station and the UE communicate through the air interface. For each User Equipment (UE) attached to the network, there is one MME serving it, and the MME is called the serving MME of the UE.

The reasons for random access in the LTE system are as follows:

1. Access from Radio Resource Control (RRC) idle (RRC_IDLE) state (also known as initial access);

2. The radio link fails to initiate RRC connection reestablishment (also a type of initial access);

3. The handover process requires random access;

4. When the UE is in the RRC connection (RRC_CO NECTED), downlink data arrives;

5. The uplink data arrives when the UE is in RRC_CO NECTED;

For the case of downlink data arrival and handover, if there is a dedicated preamble code, non-contention random access can be used, and random access can be used for random access caused by all other random access reasons. .

In the X2 handover process, the source eNB determines to perform an X2 handover operation according to the measurement result, and the source eNB sends a handover request message to the target eNB, where the message includes the access layer key Ke B* that needs to be changed after the handover, and all bearer related information of the UE. Parameters, etc., then the target eNB configures new bearers according to these parameters, including Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB) Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) / Radio Link Control (RLC) I Media Access Control (MAC) entity. The target eNB performs an admission decision, and if the decision is acceptable, the target eNB returns a handover response message to the source eNB. After receiving the handover response message, the source eNB sends an RRC reconfiguration message to the UE, and the source eNB stops receiving and transmitting data and control planes. Received by the UE After the RRC reconfiguration message, the reception and transmission of the data and control planes of the source eNB are stopped, and the target eNB is synchronized.

The above synchronization operations include downlink synchronization and uplink synchronization. The following is as follows: The UE first performs the downlink synchronization with the target base station through the physical layer process, and then according to the downlink timing relationship of the target base station, and the preamble and physical random access channel (PRACH) indication carried in the RRC reconfiguration signaling. Initiating non-contention random access or contention random access (ra-Preamblelndex is 000000) to establish uplink synchronization with the target base station. Note that: For handover, the RRC reconfiguration signaling carries the Cell Radio Network Temporary Identifier (C-RNTI) and the random access dedicated configuration (preamble and PRACH) allocated by the target base station to the UE. The dedicated configuration allows the default, once default, the protocol specifies that the UE needs to initiate a contention random access.

In the existing heterogeneous network, as shown in FIG. 2, the macro evolved base station (Macro eNB) provides basic coverage and works in the existing LTE cellular frequency band, while the local evolved base station (Local eNB) provides hotspot coverage and can work in the frequency band above 3 GHz. . The Local eNB is connected to the Macro eNB using a high speed link (wired/wireless). The UE working in the common coverage area of the Marco eNB and the Local eNB can simultaneously use the resources of the Marco eNB and the local eNB, that is, inter-base station aggregation (inter-e B aggregation). In the case of inter-e B aggregation, some radio bearers (RBs) of the UE are carried by the Marco cell, and some RBs are carried by the local cell.

Currently, for IDLE UE access, handover, and bearer separation in the case of inter-eNB aggregation, the UE accesses the target cell to perform contention or non-contention random access. However, with the introduction of micro cells, such as home coverage, if the cell coverage is small, such as less than the timing adjustment (Time Advance, TA), the minimum adjustment granularity (corresponding cell radius is about 78 m), how does the UE use the current The access method increases the delay caused by random access.

In summary, the delay caused by random access is relatively long when accessing a cell. The present invention provides a method, a system, and a device for accessing a cell, which are used to solve the problem of long delay caused by random access when accessing a micro cell in the prior art.

A method for accessing a cell according to an embodiment of the present invention includes:

The network side device determines a cell type of a cell that the user equipment needs to access;

The network side device notifies the user equipment that the cell type of the cell that the device needs to access, and is used to notify the user equipment whether to perform a random access procedure according to the cell type.

Another method for cell access provided by the embodiment of the present invention includes:

The user equipment determines, according to the received notification from the network side device, the cell type of the cell that needs to be accessed; and the user equipment determines, according to the cell type, whether a random access procedure needs to be performed.

A network side device accessed by a cell according to an embodiment of the present invention includes: a first type determining module, configured to determine a cell type of a cell that the user equipment needs to access;

The first processing module is configured to notify the user that the cell type of the cell that the device needs to access, and is used to notify the user equipment whether to perform a random access procedure according to the cell type.

A user equipment accessed by a cell according to an embodiment of the present invention includes:

a second type determining module, configured to determine, according to the received notification from the network side device, a cell type of a cell that needs to be accessed;

And a second processing module, configured to determine, according to the cell type, whether a random access procedure needs to be performed.

A system for accessing a cell according to an embodiment of the present invention includes:

a network side device, configured to determine a cell type of a cell that the user equipment needs to access, and notify a cell type of a cell that the user equipment needs to access;

The user equipment is configured to determine, according to the received notification from the network side device, a cell type of the cell that needs to be accessed, and determine, according to the cell type, whether a random access procedure needs to be performed.

In the embodiment of the present invention, the network side device notifies the type of the cell that the user equipment accesses, so that the user equipment does not need uplink synchronization when accessing the micro cell, and the delay caused by the random access is shortened. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a network architecture of an E-UTRAN in the prior art;

2 is a schematic diagram of an E-UTRAN network architecture including a Local eNB in the prior art;

3 is a schematic structural diagram of a system for accessing a cell according to an embodiment of the present invention;

4A is a schematic structural diagram of a network side device in a system for accessing a cell according to an embodiment of the present invention;

4B is a schematic structural diagram of an entity of a network side device in a system accessed by a cell according to an embodiment of the present invention;

5A is a schematic structural diagram of a function of a user equipment in a system for accessing a cell according to an embodiment of the present invention;

5B is a schematic diagram of an entity structure of a user equipment in a system for accessing a cell according to an embodiment of the present invention;

6 is a schematic flowchart of a method for a cell side device to perform cell access according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a method for a user equipment to perform cell access according to an embodiment of the present invention;

8 is an X2 handover process in which random access is not performed according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a method for establishing an RRC connection in which an idle device user equipment does not use random access according to an embodiment of the present invention. DETAILED DESCRIPTION With the introduction of micro cells, such as home coverage, if the cell coverage is small, such as less than the minimum adjustment granularity of the TA (the corresponding cell radius is about 78 m), uplink synchronization is not required to access these cells. The network side device of the embodiment of the present invention notifies the type of the cell that the user equipment accesses, so that the user equipment does not need to uplink when accessing the micro cell. Synchronization, which reduces the delay caused by random access.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

As shown in FIG. 3, the system for accessing a cell in the embodiment of the present invention includes: a network side device 10 and a user equipment 20. The network side device 10 is configured to determine a cell type of a cell that the user equipment 20 needs to access, and notify a cell type of a cell that the user equipment needs to access;

The user equipment 20 is configured to determine, according to the received notification from the network side device 10, a cell type of a cell that needs to be accessed, and determine, according to the cell type, whether a random access procedure needs to be performed.

If the cell type of the cell that needs to be accessed is 4 cells, the user equipment 20 determines that the random access procedure is not performed.

Preferably, the network side device 10 notifies the cell type of the cell that the user equipment needs to access through broadcast or dedicated signaling.

Correspondingly, the user equipment 20 determines the cell type of the cell that needs to be accessed through broadcast or dedicated signaling.

In the implementation, there are many ways for the network side device 10 to notify the user of the cell type of the cell that the user equipment needs to access by broadcasting, and several types are listed below:

Method 1, explicit indication.

The network side device 10 includes a cell type indication in a broadcast (Master Information Block) or SIB (System Information Block) 1 or SIB2;

Correspondingly, the user equipment 20 determines the cell type of the cell to be accessed according to the cell type indication information included in the MIB or SIB1 or SIB2.

For example, the cell type indication information is 1 bit, and the value 1 indicates a micro cell (or requires random access); the value is 0, indicating a non-micro cell (or does not require random access).

Method 2, implicit indication.

The network side device 10 notifies the cell type of the cell to be accessed in accordance with whether or not the RACH (Random Access Channel) common configuration information is configured in the broadcast information.

Specifically, if the cell type of the cell to be accessed is a micro cell, the network side device 10 does not include the RACH common configuration information in the broadcast information, and if the cell type of the cell to be accessed is a non-micro cell, the network side device broadcasts The information includes RACH public configuration information;

Correspondingly, after the received broadcast information does not include the RACH common configuration information, the user equipment 20 determines that the cell type of the cell to be accessed is a micro cell, and otherwise determines that the cell type of the cell that needs to be accessed is a non-micro cell. It should be noted that the embodiment of the present invention is not limited to the above two modes of using the broadcast notification, and the other embodiments of the present invention can also be applied by means of the broadcast notification.

In the implementation, there are many ways for the network side device 10 to notify the cell type of the cell that the user equipment needs to access through dedicated signaling, and several types are listed below:

Method 1, explicit indication.

The network side device 10 transmits RRC signaling including cell type indication information;

Correspondingly, the user equipment 20 determines the cell type of the cell to be accessed by using the cell type indication information included in the RRC signaling.

For example, for handover, a cell type indication is added in the RRC reconfiguration signaling, and for inter-e B aggregation, a cell type indication is added in the RB reconfiguration signaling.

Preferably, if an explicit indication is used and the indication type is that no random access is required, the RACH public and private parameters may not be configured in the RRC signaling.

Method 2, implicit indication.

The network side device 10 notifies the cell type of the cell to be accessed according to the TA and/or TAT timing advance timer in the signaling.

Specifically, if the cell type of the cell to be accessed is 4 cells, the network side device 10 adds a TA indication in the RRC signaling and sets the TA to a special value and/or adds a TAT indication and sets the TAT to a special value;

Correspondingly, after the user equipment 20 includes the TA indication in the received RRC signaling and the TA is a special value and/or contains a TAT indication and the TAT is a special value, determining that the cell type of the cell that needs to be accessed is a micro cell, otherwise determining The cell type of the cell that needs to be accessed is a non-micro cell.

For example, add a TA indication in the RRC signaling and take a value of 0 and / or add a TAT indication and set the TAT to infinity. Method 3, implicit indication.

If the cell type of the cell to be accessed is a micro cell, the network side device 10 does not include the RACH public configuration information in the RRC signaling, and if the cell type of the cell to be accessed is a non-4 cell, the network side device is in the RRC signaling. Contains RACH public configuration information;

Correspondingly, after the received RRC signaling does not include the RACH common configuration information, the user equipment 20 determines that the cell type of the cell to be accessed is a micro cell, and otherwise determines that the cell type of the cell to be accessed is a non-micro cell.

Preferably, the foregoing RRC signaling is RRC reconfiguration signaling or RB separation signaling.

It should be noted that the embodiments of the present invention are not limited to the foregoing three types of dedicated signaling notification manners, and other embodiments that can be notified by dedicated signaling also apply to the embodiments of the present invention.

In the implementation, if the network side device 10 is the target base station, the network side device 10 acquires the cell type of the cell that the user equipment needs to access through the Operations and Maintenance (OAM) entity; or according to its own transmit power and frequency. The point information determines the cell type of the cell that the user equipment needs to access (such as its own transmit power is small or The frequency point information belongs to the micro cell, and is determined to be a micro cell.

If the network side device 10 is the source base station, the network side device 10 determines the cell type of the cell that the user equipment needs to access by receiving the cell type indication from the target base station through the inter-base station interface.

In an implementation, if the cell that the user equipment 20 needs to access is a micro cell, and the network side device 10 is the cell to which the cell to be accessed belongs, the network side device 10 notifies the cell type of the cell that the user equipment needs to access. After the user equipment accesses the cell, the uplink synchronization of the user equipment 20 is not maintained.

In the implementation, after the random access procedure is not performed, the user equipment sends uplink data according to the downlink timing of the access cell after performing downlink synchronization with the base station to which the access cell belongs.

For the handover scenario, the base station to which the target cell belongs, after the user equipment accesses the cell, notifies the user equipment 20 of an uplink scheduling grant (UL grant), where the resource corresponding to the UL grant is a non-contention time-frequency resource or a competitive time-frequency resource; Or

After the specific time delay, the base station to which the target cell belongs is notified to the user equipment 20 that the resource is a non-contention time-frequency resource or a competitive time-frequency resource, and the specific delay is that the user equipment processes the reconfiguration message and The sum of the delays of the downlink synchronization performed by the base station to which the target cell belongs.

For the idle state, the RRC connection setup process does not need to be accessed immediately. Preferably, if the cell that the user equipment 20 needs to access is a micro cell, and the network side device 10 is the cell to which the cell to be accessed belongs;

After the network side device 10 notifies the cell type of the cell that the user equipment needs to access, the user equipment is notified by broadcast to the resource location of the uplink and downlink contention transmission and/or the modulation and coding mode corresponding to the uplink and downlink contention resources (Modulation and coding). Scheme, MCS); after receiving the RRC connection setup request from the user equipment 20, allocate a C-RNTI to the user equipment 20, and connect the Common Control Channel (CCCH) service data unit of the RRC connection request (Service) The media access layer control unit (MAC) and the UL grant of the C-RNTI transmit the corresponding resources through the downlink, and send the corresponding MCS to the user equipment 20; After confirming the information of the C-RNTI, the user equipment 20 transmits an RRC connection setup message to the user equipment 20.

Correspondingly, after the user equipment 20 determines whether the random access procedure needs to be performed according to the cell type, if the random access procedure does not need to be performed, the user equipment 20 uses the contention resource to send an RRC connection establishment request for requesting allocation of the C-RNTL.

After the user equipment 20 sends the RRC connection establishment request by using the contention resource, the contention resolution timer is started. After the timer expires, if the network side feedback is not received, a random number is generated in the predetermined range value, and the random number is obtained. The RRC connection establishment request is initiated again after the corresponding time arrives.

For example, if the predetermined range is [0, 10] ms, then a random number is randomly generated in this range, and the random number is 5, and the user equipment initiates the RRC connection establishment request again after 5 ms.

For the uplink transmission process initiated by the connected state user equipment without DSR, preferably, if the user equipment 20 needs The accessed cell is a micro cell, and the network side device 10 is a subordinate cell to which the cell to be accessed belongs;

After the network side device 10 notifies the cell type of the cell that the user equipment 20 needs to access, the user equipment is notified by broadcast to the resource location for uplink competitive transmission; and the user equipment 20 is received to use the physical uplink control channel (PUCCH). The format (format) la/lb sends the UL grant to the user equipment 20 after the feedback information including the scheduling request (SR) information is transmitted.

Correspondingly, if the user equipment 20 is in a connected state without a Dedicated Scheduling Request (DSR), and the uplink data needs to be sent but there is no UL grant, the user equipment 20 uses the contention resources. The Buffer State Report (BSR) or the BSR and the data, or only the uplink data (for example, the resource is larger than the uplink data and the C-RNTI indicates the resource required for the transmission), and carries the C-RNTI of the user equipment; And the user equipment 20 transmits the feedback information including the SR information by using the PUCCH formatla/lb.

The network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.

As shown in FIG. 4A, the network side device in the system accessed by the cell in the embodiment of the present invention includes: a first type determining module 400 and a first processing module 410.

a first type determining module 400, configured to determine a cell type of a cell that the user equipment needs to access;

The first processing module 410 is configured to notify the user that the cell type of the cell that the device needs to access, and is used to notify the user that the device needs to perform a random access procedure according to the cell type.

Preferably, the first processing module 410 notifies the cell type of the cell that the user equipment needs to access by broadcast or dedicated signaling.

Preferably, the first processing module 410 notifies the cell type of the cell that the user equipment needs to access by using the MIB or SIB1 or SIB2 in the broadcast; or if the cell type of the cell to be accessed is a micro cell, the broadcast information does not include The RACH common configuration information includes the RACH public configuration information in the broadcast information if the cell type of the cell to be accessed is a non-micro cell.

Preferably, the first processing module 410 sends RRC signaling including cell type indication information; or if the cell type of the cell to be accessed is a micro cell, add a TA indication in the RRC signaling and set the TA to a special value and/or Or adding a TAT indication and setting the TAT to a special value; or if the cell type of the cell to be accessed is a micro cell, the RACH common configuration information is not included in the RRC signaling, and the cell type of the cell to be accessed is a non-micro cell. The RACH common configuration information is included in the RRC signaling.

Preferably, if the network side device is the target base station, the first type determining module 400 acquires, by using the OAM entity, the cell type of the cell that the user equipment needs to access; or determines, according to its own transmit power and frequency point information, that the user equipment needs to access. The cell type of the cell.

Preferably, if the network side device is the source base station, the first type determining module 400 determines the cell type of the cell that the user equipment needs to access by receiving the cell type indication from the target base station through the inter-base station interface. Preferably, the network side device is a target base station, and the first processing module 410 notifies the user equipment of the UL grant after the user equipment accesses the cell, where the resource corresponding to the UL grant is a non-competitive time-frequency resource or a competitive time-frequency resource. Or, after a specific delay, notify the user equipment UL grant, where the resource corresponding to the UL grant is a non-contention time-frequency resource or a competitive time-frequency resource, and the specific delay is that the user equipment processes the reconfiguration message and the target cell belongs to The sum of the delays of the base station for downlink synchronization.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is the cell to which the cell to be accessed belongs. The first processing module 410 does not maintain the uplink synchronization of the user equipment after the user equipment accesses the cell. .

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs; the first processing module 410 notifies the cell type of the cell that the user equipment needs to access, and then broadcasts Notifying the user equipment of the resource location for the uplink and downlink contention transmission and/or the MCS corresponding to the uplink and downlink contention resources; after receiving the RRC connection establishment request from the user equipment, assigning a C-RNTI to the user equipment, and The CCCH SDU of the RRC connection request, the MAC CE and the UL grant of the C-RNTI are transmitted to the user equipment by using the corresponding MCS through the downlink competition, and after receiving the information that the user equipment acknowledges receipt of the C-RNTI, Sending an RRC Connection Setup message to the user equipment.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs; the first processing module 410 notifies the cell type of the cell that the user equipment needs to access, and then broadcasts The user equipment is notified of the resource location for the uplink competition transmission; after receiving the feedback information of the SR information sent by the user equipment by using the PUCCH formatla/lb, the UL grant is allocated to the user equipment.

Specifically, in the hardware, the first type determining module 400 may be a processor, and the first processing module 410 may be a signal transceiving device including a transmitting and receiving antenna, etc., in this case, as shown in FIG. 4B, the cell accessing in the embodiment of the present invention The network side devices in the system include:

a first processor 4000, configured to determine a cell type of a cell that the user equipment needs to access;

The first signal transceiving device 4100 is configured to notify the user that the cell type of the cell that the device needs to access, and is used to notify the user equipment whether to perform a random access procedure according to the cell type.

Preferably, the first signal transceiving device 4100 notifies the cell type of the cell that the user equipment needs to access through broadcast or dedicated signaling.

Preferably, the first signal transceiving device 4100 notifies the cell type of the cell that the user equipment needs to access through the MIB or SIB1 or SIB2 in the broadcast; or if the cell type of the cell to be accessed is a micro cell, not in the broadcast information. The RACH common configuration information is included, and if the cell type of the cell to be accessed is a non-micro cell, the RACH public configuration information is included in the broadcast information.

Preferably, the first signal transceiving device 4100 transmits RRC signaling including cell type indication information; or if the cell type of the cell to be accessed is a micro cell, add a TA indication in the RRC signaling and set the TA to a special value and / or add a TAT indication and set the TAT to a special value; or if the cell type of the cell to be accessed is a micro cell, in the RRC letter The RACH common configuration information is not included in the command. If the cell type of the cell to be accessed is a non-micro cell, the RACH common configuration information is included in the RRC signaling.

Preferably, if the network side device is the target base station, the first processor 4000 acquires the cell type of the cell that the user equipment needs to access through the OAM entity; or determines the cell that the user equipment needs to access according to the transmission power and frequency point information of the user equipment. Cell type.

Preferably, if the network side device is the source base station; the first processor 4000 receives the cell type indication from the target base station through the inter-base station interface, and determines the cell type of the cell that the user equipment needs to access.

Preferably, the network side device is a target base station, and the first signal transceiving device 4100 notifies the user equipment UL grant after the user equipment accesses the cell, where the resource corresponding to the UL grant is a non-competitive time-frequency resource or a competitive time-frequency. After the specific time delay, the user equipment is notified of the UL grant, where the resource corresponding to the UL grant is a non-contention time-frequency resource or a time-frequency resource that is competitive. The specific delay is that the user equipment processes the reconfiguration message and the target cell belongs to the UE. The base station performs the downlink synchronization delay sum.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is the cell to which the cell to be accessed belongs. The first signal transceiving device 4100 does not maintain the uplink of the user equipment after the user equipment accesses the cell. Synchronize.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs; after the first signal transceiving device 4100 notifies the cell type of the cell that the user equipment needs to access, Broadcasting to inform the user equipment of the resource location for the uplink and downlink contention transmission and/or the MCS corresponding to the uplink and downlink contention resources; after receiving the RRC connection establishment request from the user equipment, assigning a C-RNTI to the user equipment, and The CCCH SDU of the RRC connection request, the MAC CE and the UL grant of the C-RNTI are transmitted to the user equipment by using the corresponding MCS, and the user equipment is acknowledged to receive the information of the C-RNTI. Sending an RRC connection setup message to the user equipment.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs; after the first signal transceiving device 4100 notifies the cell type of the cell that the user equipment needs to access, The broadcast informs the user equipment of the resource location for the uplink contention transmission; after receiving the feedback information including the SR information sent by the user equipment by using the PUCCH formatla/lb, the UL grant is allocated to the user equipment.

As shown in FIG. 5A, the user equipment in the system accessed by the cell in the embodiment of the present invention includes: a second type determining module 500 and a second processing module 510.

a second type determining module 500, configured to determine, according to the received notification from the network side device, a cell type of a cell that needs to be accessed;

The second processing module 510 is configured to determine, according to the cell type, whether a random access procedure needs to be performed.

Preferably, the second type determining module 500 determines the cell type of the cell that needs to be accessed by broadcast or dedicated signaling. Preferably, the second type determining module 500 determines the cell type of the cell to be accessed according to the cell type indication information included in the MIB or the SIB1 or the SIB2; or does not include the RACH public configuration information in the received broadcast information. After that, the cell type of the cell that needs to be accessed is determined to be a cell, otherwise the cell type of the cell that needs to be accessed is determined to be a non-four cell.

Preferably, the second type determining module 500 determines, by using the cell type indication information included in the RRC signaling, the cell type of the cell that needs to be accessed; or includes the ΤΑ indication in the received RRC signaling and is a special value. And/or containing the ΤΑΤ indication and ΤΑΤ being a special value, determining that the cell type of the cell to be accessed is 4 cells, otherwise determining that the cell type of the cell to be accessed is a non-micro cell; or in the received RRC signaling After the RACH common configuration information is not included, it is determined that the cell type of the cell to be accessed is 4 cells, otherwise the cell type of the cell to be accessed is determined to be a non-micro cell.

Preferably, the second processing module 510 determines whether the random access procedure needs to be performed according to the cell type, and if the random access procedure is not required to be performed, uses the contention resource to send an RRC connection setup request for requesting allocation of the C-RNTI.

Preferably, after the second processing module 510 sends the RRC connection establishment request by using the contention resource, the contention resolution timer is started. After the timer expires, if the network side feedback is not received, a random number is generated in the predetermined range value. The number waits until the time corresponding to the random number arrives to initiate the RRC connection establishment request again.

Preferably, the second processing module 510 determines whether the random access procedure needs to be performed according to the cell type, and after performing the downlink synchronization process with the base station to which the access cell belongs after performing the random access procedure, according to the access cell The downlink data is sent periodically.

Preferably, after the second processing module 510 determines whether the random access procedure needs to be performed according to the cell type, if the random access procedure is not required, and the user equipment is in a connection state without DSR, and the uplink data needs to be sent but no UL The grant uses the contention resource to send the BSR or BSR and data, or only sends the uplink data, and carries the C-RNTI of the user equipment.

Preferably, the second processing module 510 determines whether the random access procedure needs to be performed according to the cell type, if the random access procedure is not required, and the user equipment is in the connected state, and there is no DSR configuration, the PUCCH formatla/lb is used to send the Feedback information of SR information.

Specifically, in the hardware, the second type determining module 500 and the second processing module 510 may be the processor. In this case, as shown in FIG. 5B, the user equipment in the system accessed by the cell in the embodiment of the present invention includes:

The second processor 5000 is configured to determine, according to the received notification from the network side device, a cell type of the cell that needs to be accessed, and determine, according to the cell type, whether a random access procedure needs to be performed.

Preferably, the second processor 5000 determines the cell type of the cell to be accessed by broadcast or dedicated signaling. Preferably, the second processor 5000 determines the cell type of the cell that needs to be accessed according to the cell type indication information included in the MIB or the SIB1 or the SIB2; or after determining that the received broadcast information does not include the RACH public configuration information, The cell type of the cell that needs to be accessed is a micro cell, otherwise the cell type of the cell that needs to be accessed is determined to be a non-micro cell.

Preferably, the second processor 5000 determines that the required connection is needed by using the included cell type indication information in the RRC signaling. If the received RRC signaling contains the TA indication and the TA is a special value and/or contains a TAT indication and the TAT is a special value, the cell type of the cell that needs to be accessed is determined to be a micro cell. Otherwise, it is determined that the cell type of the cell to be accessed is a non-micro cell; or after the received RRC signaling does not include the RACH common configuration information, it is determined that the cell type of the cell to be accessed is 4 cells, otherwise it is determined that access is required. The cell type of the cell is a non-4 cell.

Preferably, the user equipment further includes: a second signal transceiver 5200, configured to: after the second processor 5000 determines, according to the cell type, whether the random access procedure needs to be performed, if the random access procedure does not need to be performed, The contending resource sends an RRC connection setup request for requesting allocation of the C-RNTI.

Preferably, the second signal transceiving device 5200 is further configured to: after the RRC connection establishment request is sent by using the contention resource, start the contention resolution timer, and if the network side feedback is not received after the timer expires, the predetermined range is A random number is generated in the value, and the RRC connection establishment request is initiated again after the time corresponding to the random number arrives.

Preferably, the second signal transceiving device 5200 is further configured to: after the second processor 5000 determines, according to the cell type, whether the random access procedure needs to be performed, if the random access procedure does not need to be performed, After performing downlink synchronization, the base station sends uplink data according to the downlink timing of the access cell.

Preferably, the second signal transceiving device 5200 is further configured to: after the second processor 5000 determines whether the random access procedure needs to be performed according to the cell type, if the random access procedure does not need to be performed, and the user equipment is in the connection without the DSR If the uplink data needs to be sent but there is no UL grant, the BSR or BSR and data are sent using the contention resources, or only the uplink data is sent, and the C-RNTI of the user equipment is carried.

Preferably, the second signal transceiving device 5200 is further configured to: after the second processor 5000 determines, according to the cell type, whether the random access procedure needs to be performed, if the random access procedure does not need to be performed, and the user equipment is in the connected state, and Without DSR configuration, feedback information containing SR information is transmitted using PUCCH formatla/lb.

Based on the same inventive concept, the embodiment of the present invention further provides a method for a cell-side device to perform cell access and a method for a user device to perform cell access, and the principle of solving the problem by using the method and the cell in the embodiment of the present invention in FIG. The systems accessed are similar, so the implementation of these methods can be implemented systematically, and the repetitions are not repeated here.

As shown in FIG. 6, the method for performing cell access by the network side device in the embodiment of the present invention includes the following steps: Step 601: The network side device determines a cell type of a cell that the user equipment needs to access;

Step 602: The network side device notifies the cell type of the cell that the user equipment needs to access, and is used to notify the user equipment whether to perform a random access procedure according to the cell type.

Preferably, in step 602, the network side device notifies the cell type of the cell that the user equipment needs to access through broadcast or dedicated signaling.

Preferably, the network side device notifies the cell type of the cell that the user equipment needs to access by broadcasting, including: the network side device includes the cell type indication in the broadcast MIB or SIB1 or SIB2; or

If the cell type of the cell to be accessed is a micro cell, the network side device does not include the RACH public in the broadcast information. For the configuration information, if the cell type of the cell to be accessed is a non-micro cell, the network side device includes the RACH public configuration information in the broadcast information.

Preferably, the cell type of the cell that the network side device needs to access by the dedicated signaling user equipment includes: the network side device sends the RRC signaling including the cell type indication information; or

If the cell type of the cell to be accessed is a micro cell, the network side device adds a ΤΑ indication to the RRC signaling and sets ΤΑ to a special value and/or adds a ΤΑΤ indication and sets ΤΑΤ to a special value; or

If the cell type of the cell to be accessed is a micro cell, the network side device does not include the RACH common configuration information in the RRC signaling, and if the cell type of the cell to be accessed is a non-micro cell, the network side device is in the RRC signaling. Contains RACH public configuration information.

Preferably, the RRC signaling is RRC reconfiguration signaling or RB separation signaling.

Preferably, if the network side device is the target base station; in step 601, the network side device acquires the cell type of the cell that the user equipment needs to access through the MME entity; or determines that the user equipment needs to be connected according to its own transmit power and frequency point information. The cell type of the incoming cell.

Preferably, if the network side device is the source base station; in step 601, the network side device receives the cell type indication from the target base station through the inter-base station interface, and determines the cell type of the cell that the user equipment needs to access.

Preferably, after step 602, the method further includes:

After the user equipment accesses the cell, the base station to which the target cell belongs is notified to the user equipment UL grant, where the resource corresponding to the UL grant is a non-competitive time-frequency resource or a competitive time-frequency resource; or

After the specific time delay, the base station to which the target cell belongs is notified to the user equipment UL grant, where the resource corresponding to the UL grant is a non-contention time-frequency resource or a competitive time-frequency resource, and the specific delay is that the user equipment processes the reconfiguration message and the target. The sum of the delays of the downlink synchronization performed by the base station to which the cell belongs.

Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs. Step 602 further includes:

After the user equipment accesses the cell, the network side device does not maintain the uplink synchronization of the user equipment.

The network side device notifies the user equipment of the resource location for uplink and downlink contention transmission and/or the MCS corresponding to the uplink and downlink contention resources through broadcast;

After receiving the RRC connection setup request from the user equipment, the network side device allocates a C-RNTI to the user equipment, and transmits the CCCH SDU of the RRC connection request, the MAC CE and the UL grant of the C-RNTI through the downlink competition transmission. The resource is sent to the user equipment by using the corresponding MCS;

After receiving the information that the user equipment acknowledges receipt of the C-RNTI, the user equipment sends an RRC connection setup message to the user equipment. Preferably, the cell that the user equipment needs to access is a micro cell, and the network side device is a cell to which the cell to be accessed belongs. Step 602 further includes:

The network side device notifies the user equipment of the resource location for uplink competitive transmission by broadcasting;

After receiving the feedback information of the SR information sent by the user equipment by using the PUCCH formatla/lb, the network side device allocates a UL grant to the user equipment.

As shown in FIG. 7, the method for a user equipment to perform cell access according to an embodiment of the present invention includes the following steps:

Step 701: The user equipment determines, according to the received notification from the network side device, a cell type of the cell that needs to be accessed.

Step 702: The user equipment determines, according to the cell type, whether a random access procedure needs to be performed.

Preferably, in step 701, the user equipment determines the cell type of the cell that needs to be accessed through broadcast or dedicated signaling. Preferably, the user equipment determines, by using a broadcast, a cell type of a cell that needs to be accessed, including:

The user equipment determines the cell type of the cell to be accessed according to the cell type indication information included in the MIB or SIB1 or SIB2; or

After the received broadcast information does not include the RACH public configuration information, the user equipment determines that the cell type of the cell to be accessed is a micro cell, and otherwise determines that the cell type of the cell to be accessed is a non-micro cell.

Preferably, the user equipment determines the cell type of the cell that needs to be accessed by using dedicated signaling, including:

The user equipment determines the cell type of the cell to be accessed by using the cell type indication information included in the RRC signaling; or

After the user equipment includes the TA indication in the received RRC signaling and the TA is a special value and/or contains a TAT indication and the TAT is a special value, the cell type of the cell that needs to be accessed is determined to be 4 cells, otherwise the access needs to be determined. The cell type of the cell is a non-micro cell; or

After the received RRC signaling does not include the RACH common configuration information, the user equipment determines that the cell type of the cell to be accessed is a micro cell, and determines that the cell type of the cell to be accessed is a non-micro cell.

Preferably, after step 702, the method further includes:

If the random access procedure does not need to be performed, the user equipment uses the contention resource to send an RRC connection setup request for requesting allocation of the C-RNTI.

Preferably, after the user equipment sends the RRC connection establishment request by using the contention resource, the method further includes:

The user equipment starts the contention resolution timer. After the timer expires, if no feedback is received from the network side, a random number is generated in the predetermined range value, and the RRC connection establishment request is initiated again after the time corresponding to the random number arrives.

Preferably, after step 702, the method further includes:

After the random access procedure is not performed, the user equipment performs downlink synchronization with the base station to which the access cell belongs, and then sends uplink data according to the downlink timing of the access cell. Preferably, after step 702, the method further includes:

If the random access procedure is not required, the user equipment is in the connection state without the DSR, and the uplink data needs to be sent but there is no UL grant, the user equipment uses the contention resources to send the BSR or the BSR and the data, or only the uplink data. The C-RNTI of the user equipment is carried at the same time.

Preferably, after step 702, the method further includes:

If the random access procedure is not required, the user equipment is in the connected state, and there is no DSR configuration, the user equipment uses PUCCH formatla/lb to send feedback information including the SR information.

For example, FIG. 6 and FIG. 7 can synthesize a process to form a cell access method, that is, step 601 and step 602 are performed first, and then step 701 and step 702 are performed.

The scheme of the present invention will be described below with four examples.

Example 1: Taking X2 switching as an example, the switching process is shown in Figure 8.

Step 801: The source eNB sends a Measurement Configuration Control message to the UE.

Step 802: The UE sends a measurement report to the source eNB.

Step 803: The source eNB performs a handover decision according to the measurement 4 (HO Decision).

Step 804: After determining that the UE can be handed over, the source eNB sends a Handover Request message to the target eNB.

Step 805: The target eNB performs an admission control (Admission Control).

Step 806: The target eNB sends a Handover Request Acknowledge message to the source eNB.

Step 807: The source eNB sends a Handover Command message to the UE.

Step 808: The source eNB sends a sequence number status transfer message to the target eNB.

Step 809: The UE performs downlink and uplink synchronization with the target eNB.

Step 810: The UE sends an RRC Connection Reconfiguration Complete (RRC Connection Reconfiguration Complete; RRC, Radio Resource Control, Radio Resource Control) message to the target eNB.

Step 811: The target eNB sends a Path Switch Request message to the MME serving the UE.

Step 812: After receiving the path conversion request, the MME checks information such as the subscription data of the entity, and if the entity is a UE, sends a Modify Bearer Request message to the S-GW (Serving GW, the serving gateway).

Step 813: The S-GW converts the downlink path.

Step 814: The S-GW returns a Modify Bearer Response message to the MME.

Step 815: The MME sends a Path Switch Request Acknowledge message carrying the UE information to the target eNB. Step 816: The target eNB sends a UE Context Release message to the source eNB. Step 817: The source eNB releases the resource.

In step 807, the RRC reconfiguration message needs to implicitly or implicitly carry the cell type indication.

According to the cell type implicitly or explicitly indicated in step 807, the UE determines that the access target cell does not need to perform random access, and step 809 may be omitted.

For the case where the random access is not required, the UL grant can be obtained after the UE accesses the target cell. The target base station indicates the initial UL grant after the UE accesses the new cell in step 806, and the UL grant may be non-exhaustive. Time-frequency resources for contention can also be time-frequency resources for competition.

After receiving the RRC reconfiguration message and completing the downlink synchronization with the target cell, the UE directly sends the DSR. The DSR resource is allocated by the target base station in step 806, and the source base station transparently transmits the signal to the UE in step 807.

The target base station estimates the delay of the UE processing the reconfiguration message and the downlink synchronization with the target base station, and the multiple downlink subframes that meet the delay requirement may repeatedly allocate the UL grant to the UE.

The target base station does not need to send the uplink synchronization of the TAC maintenance UE to the UE.

Example 2: Inter-e B aggregation bearer separation.

The example in which the UE separates the carrier of the Marco eNB into the Local eNB is described as an example:

1. The UE receives the RB reconfiguration message from the macro eNB, where the message carries the type indication of the target cell, and the specific cell type indication manner is the same as the first example. If the indicated cell type is a type that does not require random access, the RACH public and private configuration may not be included in the RB reconfiguration message.

2. The UE still uses the old DRB link to receive and transmit PDCP PDUs;

3. The UE configures the RLC/MAC and PHY layers of the new DRB;

4. The UE starts downlink synchronization operation for the new Local eNB;

After the UE completes the downlink synchronization with the target local eNB, if the RB reconfiguration message includes the cell type indication, and indicates that no random access is required, the UE may consider that the target cell is always uplink synchronized, and the subsequent uplink transmission is directly The uplink data may be transmitted according to the downlink timing of the cell.

6. After completing the downlink synchronization of the Local eNB, the UE may start to organize and send an RRC reconfiguration complete message to the Me B.

After receiving the RRC reconfiguration complete message, the Macro eNB will send an ACK of Layer 2, stop the data transmission of the original DRB link, and notify the Local eNB to start receiving and transmitting data on the new DRB.

8. After receiving the HARQ ACK feedback of the RRC reconfiguration complete message or the RLC ACK of the RRC reconfiguration complete message, the UE starts to send data on the new DRB and terminates the data transmission of the old DRB.

9. When the UE receives the first data packet from the new DRB, or waits for a certain time after step 8, the link of the original DRB will be completely deleted;

10. The Local eNB does not need to maintain the uplink synchronization of the UE, that is, it does not need to send the TAC and maintain the TAT. Example 3: The IDLE state does not require a random access RRC connection establishment process.

IDLE state Two purposes of the UE random access procedure: Obtain uplink synchronization, C-RNTI, and establish an RRC connection. If the IDLE state UE accesses the network without random access, then only the contention access method can be used. The specific process is shown in Figure 9:

1. The base station broadcasts the resource location of the UE for uplink and downlink contention and/or the MCS mode corresponding to the uplink and downlink contention resources, which may be periodically allocated;

2. The UE initiates an RRC connection setup request by using the uplink competing resource, and starts a contention resolution timer. If the base station can receive, the UE allocates a CRNTI to the UE, and then allocates the CCCH SDU of the RRC connection setup request and the base station to the UE. The C-RNTI MAC CE and the UL grant (the UE indicates that the C-RNTI is received) are sent to the UE through the downlink contention resource and the specified MCS;

3. Before the contention resolution timer expires, if the UE receives the CCCH SDU on the downlink contention resource, and the CCCH SDU and the CCCH SDU sent by the UE are consistent, the access is considered successful, and the UE utilizes 2) The indicated UL grant transmission indication information confirms receipt of the allocated C-RNTI to the base station.

4. The base station receives the indication and sends an RRC connection setup message to the UE.

In the implementation, if a collision occurs, the UE does not receive a response after the contention resolution timer expires, and may use a backoff mechanism similar to RA, the protocol specifies a maximum backoff value, and the UE selects a value between 0-backoff values. The random number, the RRC connection setup request is initiated again.

Example 4: A connection state user without a DSR initiates an uplink transmission process.

For a connected UE without a DSR, if an uplink transmission is to be initiated but there is no UL grant, there are two ways.

First, the competition for uplink transmission:

If the UE is located in a small cell and the DSR resource is not configured, when the UE has uplink data to be transmitted, the uplink resource may be used, and the uplink resource is used by the base station to notify all UEs in the cell through broadcast signaling. If the UE has uplink data to be sent, but there is no uplink grant, the BSR or BSR data may be sent by using the contention resource or the data may be directly sent when the data volume is small, and the CRNTI information of the UE is carried, so that the base station identifies which UE sends the data. .

Second, the group competition for uplink transmission:

In addition, in order to reduce the collision, the base station may also group the UEs that access the cell, and notify the packet where each UE is located and the RNTI corresponding to the group scheduling by using dedicated signaling, and the UE only has public competition in the cell group to which it belongs. The uplink competition is initiated on the resource, and the content that can be transmitted by the uplink competition transmission is the same as the case of no packet.

For the above two modes, once the uplink transmission fails, it may wait for the next competitive transmission opportunity to initiate a competition transmission again or randomly wait for a period of time to initiate a competitive uplink transmission again.

In the implementation, the PUCCH formatla/lb is used to carry the SR information through ACK/NACK feedback, and the base station obtains The UL information is assigned to the UE after the SR information.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

1. A cell access method, characterized in that the method includes:

The network side device determines the cell type of the cell that the user equipment needs to access;

The network side device notifies the user equipment of the cell type of the cell that needs to access, and is used to notify the user equipment to determine whether to perform a random access process based on the cell type.

2. The method of claim 1, wherein the network side device notifies the user device of the cell type of the cell that needs to access, including:

The network side device notifies the user equipment of the cell type of the cell that needs to access through broadcast or dedicated signaling.

3. The method of claim 2, wherein the network side device notifies the user equipment of the cell type of the cell that needs to access through broadcasting, including:

The network side device notifies the user equipment of the cell type of the cell that needs to access through the main information block MIB or system information block SIB1 or SIB2 in the broadcast; or,

If the cell type of the cell that needs to be accessed is a micro cell, the network side device does not include the random access channel RACH public configuration information in the broadcast information. If the cell type of the cell that needs to be accessed is a non-cell, the network side device The device includes RACH public configuration information in broadcast information.

4. The method of claim 2, wherein the network side device notifies the user device of the cell type of the cell that the user device needs to access through dedicated signaling, including:

The network side device sends radio resource control RRC signaling including cell type indication information; or

If the cell type of the cell that needs to be accessed is a 4 cell, the network side device adds a timing advance TA indication in the RRC signaling and sets TA to a special value and/or adds a timing advance timer TAT indication and sets TAT to a special value. value; or

If the cell type of the cell that needs to be accessed is a micro cell, the network side device does not include the RACH public configuration information in the RRC signaling. If the cell type of the cell that needs to be accessed is a non-4 cell, the network side device RRC signaling contains RACH public configuration information.

5. The method of claim 4, wherein the RRC signaling is RRC reconfiguration signaling or radio bearer RB separation signaling.

6. The method of claim 1, wherein if the network side device is a target base station; the network side device determines the cell type of the cell that the user equipment needs to access, including:

The network side device obtains the cell type of the cell that the user equipment needs to access by operating and maintaining the OAM entity; or

The network side device determines the cell type of the cell that the user equipment needs to access based on its own transmission power and frequency point information.

7. The method of claim 1, wherein if the network side device is a source base station; the network side device determines the cell type of the cell that the user equipment needs to access, including:

The network side device determines the cell type of the cell that the user equipment needs to access through the cell type indication received from the target base station through the inter-base station interface.

8. The method of claim 1, wherein after the network side device notifies the user device of the cell type of the cell that the user device needs to access, it further includes:

After the user equipment accesses the cell, the base station to which the target cell belongs notifies the user equipment of an uplink scheduling grant UL grant, where the resources corresponding to the UL grant are non-competition time-frequency resources or competitive time-frequency resources; or

The base station to which the target cell belongs notifies the user equipment of the UL grant after a specific delay, where the resource corresponding to the UL grant is a non-competition time-frequency resource or a competitive time-frequency resource, and the specific delay is the user equipment. The sum of the delays in processing the reconfiguration message and performing downlink synchronization by the base station to which the target cell belongs.

9. The method of claim 1, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

After the network side device notifies the user device of the cell type of the cell that needs to access, it also includes:

The network side device does not maintain uplink synchronization of the user equipment after the user equipment accesses the cell.

10. The method of claim 1, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

The network side device notifies the user equipment of the resource location for uplink and downlink contention transmission and/or the modulation and coding scheme MCS corresponding to the uplink and downlink contention resources through broadcast;

After receiving the RRC connection establishment request from the user equipment, the network side device allocates a cell radio network temporary identifier C-RNTI to the user equipment, and adds the common control channel service data unit CCCH SDU of the RRC connection request to the user equipment. . The media access layer control unit MAC CE and UL grant of the C-RNTI transmit the corresponding resources through downlink competition, and use the corresponding MCS to send them to the user equipment;

After receiving the information confirming receipt of the C-RNTI from the user equipment, the user equipment sends an RRC connection establishment message to the user equipment.

11. The method of claim 1, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

The network side device notifies the user equipment of the resource location used for uplink contention transmission through broadcast;

After receiving the feedback information including the scheduling request SR information sent by the user equipment using the physical uplink control channel format PUCCH formatla/lb, the network side device allocates a UL grant to the user equipment.

12. A cell access method, characterized in that the method includes: The user equipment determines the cell type of the cell that needs to be accessed based on the notification received from the network side device; the user equipment determines whether a random access process needs to be performed based on the cell type.

13. The method of claim 12, wherein the user equipment determines the cell type of the cell that needs to be accessed based on the notification received from the network side device, including:

The user equipment determines the cell type of the cell that needs to be accessed through broadcast or dedicated signaling.

14. The method of claim 13, wherein the user equipment determines the cell type of the cell that needs to be accessed through broadcasting, including:

The user equipment determines the cell type of the cell that needs to be accessed based on the cell type indication information contained in the main information block MIB or the system information block SIB1 or SIB2; or

After the received broadcast information does not include the random access channel RACH public configuration information, the user equipment determines that the cell type of the cell that needs to be accessed is a micro cell, otherwise it determines that the cell type of the cell that needs to be accessed is a non-micro cell. .

15. The method of claim 13, wherein the user equipment determines the cell type of the cell that needs to be accessed through dedicated signaling, including:

The user equipment determines the cell type of the cell that needs to be accessed through the cell type indication information contained in the radio resource control RRC signaling; or

The user equipment determines the cell that needs to be accessed after the received RRC signaling contains a timing advance timer TA indication and the TA is a special value and/or contains a timing advance timer TAT indication and the TAT is a special value. The cell type is a micro cell, otherwise it is determined that the cell type of the cell to be accessed is a non-micro cell; or

After the received RRC signaling does not contain RACH public configuration information, the user equipment determines that the cell type of the cell that needs to be accessed is a micro cell; otherwise, it determines that the cell type of the cell that needs to be accessed is a non-micro cell.

16. The method of claim 15, wherein the RRC signaling is RRC reconfiguration signaling or wireless carrier RB separation signaling.

17. The method according to claim 12, characterized in that, after the user equipment determines whether it needs to perform a random access process according to the cell type, it further includes:

If there is no need to perform a random access process, the user equipment uses the competition resource to send an RRC connection establishment request to request allocation of the cell radio network temporary identity C-RNTI.

18. The method of claim 17, wherein after the user equipment sends an RRC connection establishment request using competing resources, it further includes:

The user equipment starts the contention resolution timer. After the timer times out, if no feedback is received from the network side, a random number is generated in a predetermined range of values, and the RRC connection establishment is initiated again after the time corresponding to the random number is reached. ask.

19. The method according to claim 12, characterized in that, after the user equipment determines whether it needs to perform a random access process according to the cell type, it further includes: If there is no need to perform a random access process, the user equipment sends uplink data according to the downlink timing of the access cell after performing downlink synchronization with the base station to which the access cell belongs.

20. The method according to claim 12, characterized in that, after the user equipment determines whether it needs to perform a random access process according to the cell type, it further includes:

If there is no need to perform a random access process, the user equipment is in a connected state without dedicated scheduling request DSR resources, and there is uplink data that needs to be sent but there is no uplink scheduling permission UL grant, then the user equipment uses the contention resource to send the buffer The zone status report BSR or BSR and data, or only the data to be transmitted in the uplink, also carries the C-RNTI of the user equipment.

21. The method of claim 12, wherein after the user equipment determines whether it needs to perform a random access process according to the cell type, it further includes:

If there is no need to perform a random access process, the user equipment is in a connected state, and there is no DSR configuration, the user equipment uses the physical uplink control channel format PUCCH formatla/lb to send feedback information including the scheduling request SR information.

22. A network side device for cell access, characterized in that the network side device includes:

The first type determination module is used to determine the cell type of the cell that the user equipment needs to access;

The first processing module is used to notify the user equipment of the cell type of the cell that needs to access, and is used to notify the user equipment to determine whether to perform a random access process based on the cell type.

23. The network side device according to claim 22, wherein the first processing module is specifically configured to: notify the user equipment of the cell type of the cell that needs to access through broadcast or dedicated signaling.

24. The network side device according to claim 23, characterized in that the first processing module is specifically configured to: notify the user equipment of the cell that needs to access through the main information block MIB or the system information block SIB1 or SIB2 in the broadcast. The cell type; or if the cell type of the cell that needs to be accessed is a micro cell, the random access channel RACH public configuration information is not included in the broadcast information. If the cell type of the cell that needs to be accessed is a non-micro cell, the broadcast information Contains RACH public configuration information.

25. The network side device according to claim 23, wherein the first processing module is specifically configured to: send radio resource control RRC signaling including cell type indication information; or if the cell of the cell that needs to be accessed If the type is micro cell, add the timing advance TA indication in the RRC signaling and set TA to a special value and/or add the timing advance timer TAT indication and set TAT to a special value; or if the cell type of the cell to be accessed is For a cell, RACH public configuration information is not included in the RRC signaling. If the cell type of the cell to be accessed is a non-micro cell, RACH public configuration information is included in the RRC signaling.

26. The network side device according to claim 22, characterized in that, if the network side device is a target base station;

The first type determination module is specifically used for: Obtain the cell type of the cell that the user equipment needs to access by operating and maintaining the OAM entity; or determine the cell type of the cell that the user equipment needs to access based on its own transmit power and frequency information.

27. The network side device according to claim 22, characterized in that, if the network side device is a source base station; the first type determination module is specifically used to:

The cell type indication from the target base station received through the inter-base station interface determines the cell type of the cell that the user equipment needs to access.

28. The network side device according to claim 22, wherein the network side device is a target base station, and the first processing module is also used to:

After the user equipment accesses the cell, the user equipment is notified of the uplink scheduling grant UL grant, where the resource corresponding to the UL grant is a non-competition time-frequency resource or a contested time-frequency resource; or after a specific delay , notify the user equipment of the UL grant, where the resource corresponding to the UL grant is a non-competition time-frequency resource or a competitive time-frequency resource, and the specific delay is the user equipment processing the reconfiguration message and the base station to which the target cell belongs. The sum of downlink synchronization delays.

29. The network side device according to claim 22, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

The first processing module is also configured to: after the user equipment accesses the cell, not maintain uplink synchronization of the user equipment.

30. The network side device according to claim 22, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

The first processing module is also used to:

After notifying the user equipment of the cell type of the cell that needs to access, the user equipment is notified through broadcasting of the resource location used for uplink and downlink competition transmission and/or the modulation and coding method MCS corresponding to the uplink and downlink competition resources; after receiving the message from the user equipment After the RRC connection establishment request is made, a cell radio network temporary identifier C-RNTI is allocated to the user equipment, and the common control channel service data unit CCCH SDU of the RRC connection request, the media access layer of the C-RNTI The control unit MAC CE and UL grant transmit the corresponding resources through downlink competition, and use the corresponding MCS to send it to the user equipment; after receiving the information confirming receipt of the C-RNTI from the user equipment, Send RRC connection establishment message.

31. The network side device according to claim 22, wherein the cell that the user equipment needs to access is a micro cell, and the network side device is the base station to which the cell that needs to access belongs;

The first processing module is also used to:

After notifying the user equipment of the cell type of the cell that needs to access, notify the user equipment of the resource location for uplink contention transmission through broadcast; receiving the scheduling request SR sent by the user equipment using the physical uplink control channel format PUCCH format la/lb After receiving the feedback information, a UL grant is allocated to the user equipment.

32. A user equipment for cell access, characterized in that the user equipment includes: The second type determination module is used to determine the cell type of the cell that needs to be accessed based on the received notification from the network side device;

The second processing module is used to determine whether a random access process needs to be performed according to the cell type.

33. The user equipment according to claim 32, characterized in that the second type determination module is specifically configured to: determine the cell type of the cell that needs to be accessed through broadcast or dedicated signaling.

34. The user equipment according to claim 33, characterized in that the second type determination module is specifically configured to: determine the need to connect according to the cell type indication information contained in the main information block MIB or the system information block SIB1 or SIB2. The cell type of the cell that needs to be accessed; or after the received broadcast information does not contain the random access channel RACH public configuration information, it is determined that the cell type of the cell that needs to be accessed is 4 cells, otherwise the cell type of the cell that needs to be accessed is determined It is a non-4 cell.

35. The user equipment according to claim 33, characterized in that the second type determination module is specifically configured to: determine the cell type that needs to be accessed through the cell type indication information contained in the radio resource control RRC signaling. Cell type; or after the received RRC signaling contains a timing advance TA indication and the TA is a special value and/or contains a timing advance timer TAT indication and the TAT is a special value, determine the cell that needs to be accessed The cell type of the cell is 4 cells, otherwise it is determined that the cell type of the cell that needs to be accessed is non-4 cell; or after the received RRC signaling does not contain RACH public configuration information, it is determined that the cell type of the cell that needs to be accessed is micro area, otherwise it is determined that the cell type of the cell to be accessed is non-micro cell.

36. The user equipment according to claim 32, wherein the second processing module is further configured to: after determining whether a random access process needs to be performed according to the cell type, if it is not necessary to perform a random access process, , using competing resources to send an RRC connection establishment request to request allocation of the cell radio network temporary identity C-RNTI.

37. The user equipment of claim 36, wherein the second processing module is further configured to: after using the competition resource to send an RRC connection establishment request, start a competition resolution timer, and after the timer times out, If no feedback is received from the network side, a random number is generated within a predetermined range, and the RRC connection establishment request is initiated again after the time corresponding to the random number arrives.

38. The user equipment according to claim 32, wherein the second processing module is further configured to: determine whether a random access process needs to be performed according to the cell type, and if it is not necessary to perform a random access process. , After downlink synchronization with the base station to which the access cell belongs, the uplink data is sent according to the downlink timing of the access cell.

39. The user equipment according to claim 32, wherein the second processing module is further configured to: after determining whether a random access process needs to be performed according to the cell type, if there is no need to perform a random access process, And the user equipment is in a connected state without a dedicated scheduling request DSR, and there is uplink data that needs to be sent but there is no uplink scheduling permission UL grant, then the contention resource is used to send the buffer status report BSR or BSR and data, or just send The uplink data also carries the C-RNTI of the user equipment.

40. The user equipment according to claim 32, characterized in that, the second processing module is also used to: After judging whether the random access process needs to be performed according to the cell type, if there is no need to perform the random access process, and the user equipment is in the connected state, and there is no DSR configuration, use the physical uplink control channel format PUCCH formatla/lb to send the message containing Feedback information of scheduling request SR information.

41. A system for cell access, characterized in that the method includes:

Network-side equipment, used to determine the cell type of the cell that the user equipment needs to access, and notify the user equipment of the cell type of the cell that needs to access;

The user equipment is configured to determine the cell type of the cell that needs to be accessed based on the notification received from the network side device, and determine whether a random access process needs to be performed based on the cell type.