WO2017028060A1 - Method, device and apparatus for accessing a multiple-antenna system - Google Patents
Method, device and apparatus for accessing a multiple-antenna system Download PDFInfo
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- WO2017028060A1 WO2017028060A1 PCT/CN2015/087097 CN2015087097W WO2017028060A1 WO 2017028060 A1 WO2017028060 A1 WO 2017028060A1 CN 2015087097 W CN2015087097 W CN 2015087097W WO 2017028060 A1 WO2017028060 A1 WO 2017028060A1
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Definitions
- the present invention relates to communication technologies, and in particular, to a method, device and device for accessing a multi-antenna system.
- Multi-antenna technology is mainly divided into two major categories: MIMO (Multi-Input & Multi-Output) technology and smart antenna technology.
- MIMO Multi-Input & Multi-Output
- smart antenna technology Today, industry insiders have reached a consensus that multi-antenna technology is the mainstream technology to be used in future mobile communication systems (3G, B3G, 4G and LTE) and broadband wireless access systems. Many of its advantages, such as large system capacity, high spectrum utilization, and fast signal transmission rate, are better alternatives to the existing wireless communication systems.
- a cell is divided based on an antenna position, and each cell covers a certain range, and a UE (User Equipment) located in a cell coverage area accesses a cell in which the UE is located.
- the UE may demodulate the control channel of the cell to obtain basic information of the data channel, for example, may obtain control information such as a modulation and coding mode and a resource allocation mode, and then demodulate the data channel according to the control information, so that the UE may be in the accessed cell. Communicate with the corresponding antenna.
- Embodiments of the present invention provide a method, device, and device for accessing a multi-antenna system to form a cell structure capable of implementing space division multiplexing of a control channel.
- an embodiment of the present invention provides a method for accessing a multi-antenna system, where the inter-cell joint precoding is used to weight a cell-level pilot and a control channel;
- the method includes:
- the terminal device In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
- the method further includes: accessing the terminal device to the idle cell where the system already exists, directly or through the non-idle cell, where the idle cell already existing in the system is according to each non-idle cell in the system.
- the channel state information of the accessed terminal device is generated, and the non-idle cell is a cell that has at least one user access.
- the generating a new idle cell includes:
- Cell attribute information is determined according to the inter-cell joint precoding.
- determining whether the terminal device can access the existing idle cell in the system includes:
- the performing cell access interaction with the terminal device includes:
- the determining whether the terminal device accesses an idle cell or a non-idle cell includes:
- the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message includes:
- the performing cell access interaction with the terminal device includes:
- the determining whether the terminal device accesses an idle cell or a non-idle cell includes:
- the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message includes:
- determining whether the terminal device can access the existing idle cell in the system includes:
- the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message includes:
- the terminal device Sending a random access response to the terminal device, where the random access response includes cell identification information of the new idle cell, so that the terminal device accesses the new idle cell according to the cell identity information.
- an embodiment of the present invention provides an apparatus for accessing a multi-antenna system, where the apparatus is deployed in a multi-antenna system, and uses cell-to-cell joint pre-coding to weight cell-level pilot and control channels;
- the device includes:
- a determining module configured to determine, in a process in which the terminal device accesses the cell, whether the terminal device can access an existing idle cell in the access system, where the idle cell is a cell that has no user access;
- a new cell generation module configured to generate a new idle cell when the terminal device cannot access an existing idle cell in the system
- the first access module is configured to send an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
- the device further includes: a second access module, configured to access the terminal device directly or through a non-idle cell to an idle cell that is already in the system, where the idle cell that is already in the system is Channel state information of terminal devices that have been accessed by each non-idle cell in the system,
- the non-idle cell is a cell that has been accessed by at least one user.
- the new cell generation module includes:
- An information acquiring unit configured to acquire channel state information of the terminal device
- An encoding determining unit configured to determine inter-cell joint precoding according to the channel state information
- a cell generating unit configured to determine cell attribute information according to the inter-cell joint precoding.
- the determining module includes:
- An interaction unit configured to perform cell access interaction with the terminal device
- the first attribute determining unit is configured to determine whether the terminal device accesses an idle cell or a non-idle cell.
- the interaction unit is specifically configured to perform radio resource control RRC connection establishment interaction with the terminal device;
- the first attribute determining unit is specifically configured to determine, after receiving the RRC connection setup complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
- the first access module is specifically configured to send an RRC connection release message of the non-idle cell to the terminal device, and perform cell reselection interaction with the terminal device, so that the The terminal device accesses the new idle cell.
- the interaction unit is specifically configured to perform an Attach connection establishment interaction with the terminal device.
- the first attribute determining unit is configured to determine, after receiving the Attach Complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
- the first access module is configured to send an RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes cell identification information of the new idle cell, and And receiving an RRC connection reconfiguration response message sent by the terminal device, so that the terminal device accesses the new idle cell according to the cell identity information.
- the determining module is specifically configured to receive a random access request sent by the terminal device, and to determine whether the terminal device can access the idle cell.
- the first access module is configured to send a random access response to the terminal device, where the random access response includes cell identification information of the new idle cell, so that the terminal The device accesses the new idle cell according to the cell identity information.
- an embodiment of the present invention provides an access device, where the device is applied to multiple antenna systems.
- the system including:
- a communication interface a communication interface, a memory and a processor, and a communication bus, wherein the communication interface, the memory, and the processor communicate via the communication bus;
- the memory is used to store a program
- the processor is configured to execute the program stored by the memory; when the space division multiplexing processing device is in operation, the processor runs a program, and the program includes:
- the terminal device In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
- the device is an enhanced base station eNB in an LTE system, a WiFi wireless access point AP in a wireless fidelity system, or a base station BS in a global microwave interconnection access WiMAX.
- the method, device and device for accessing a multi-antenna system can limit access to only one terminal device in each cell, and the control channel can perform joint precoding between cells based on cell-level pilots, and the original channel does not exist.
- the channel estimation problem of the system cell-level pilot so the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the problem.
- User level pilot overhead issues are used to limit access to only one terminal device in each cell, and the control channel can perform joint precoding between cells based on cell-level pilots, and the original channel does not exist.
- FIG. 1 is a schematic diagram of a network architecture of a multi-antenna system in the prior art
- FIG. 2 is a schematic diagram of data channel space division multiplexing in the network architecture shown in FIG. 1;
- FIG. 3 is a schematic structural diagram of a multi-antenna system according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of cell type conversion in a multi-antenna system according to an embodiment of the present invention.
- Embodiment 1 is a flowchart of Embodiment 1 of a method for accessing a multi-antenna system according to the present invention
- Embodiment 6 is a flowchart of Embodiment 2 of a method for accessing a multi-antenna system according to the present invention
- FIG. 7 is a signaling flowchart of a specific implementation of the second embodiment of the method shown in FIG. 6;
- Embodiment 8 is a flowchart of Embodiment 3 of a method for accessing a multi-antenna system according to the present invention.
- FIG. 9 is a signaling flowchart of a specific implementation of the third embodiment of the method shown in FIG. 8;
- Embodiment 4 is a flowchart of Embodiment 4 of a method for accessing a multi-antenna system according to the present invention
- FIG. 11 is a signaling flowchart of a specific implementation of Embodiment 4 of the method shown in FIG. 10;
- Embodiment 12 is a schematic structural diagram of Embodiment 1 of an apparatus for accessing a multi-antenna system according to the present invention
- Embodiment 13 is a schematic structural diagram of Embodiment 2 of an apparatus for accessing a multi-antenna system according to the present invention
- FIG. 14 is a schematic structural diagram of Embodiment 1 of an access device according to the present invention.
- Multi-antenna technology has become an important direction for the development of mobile communication systems and broadband wireless access systems in the future due to its many advantages such as large system capacity, high spectrum utilization, and fast signal transmission rate.
- MIMO technology has become a key technology in LTE (Long Term Evolution) systems, and significantly increases the spectrum efficiency and data transmission rate of the system.
- the cell division mode is adopted in the multi-antenna system to enable the UE to access the multi-antenna system.
- a method of cell division is to divide a cell based on an antenna setting position, and each cell has a certain signal coverage range, and UEs located in the same cell coverage area access the same cell in which the UE is located. .
- the UE may demodulate the control channel of the cell in which it is located to obtain control information of the data channel, for example, obtaining control information such as a modulation and coding mode and a resource allocation mode, and then demodulating the data channel according to the control information. Thereby, communication with the corresponding antenna can be performed within the accessed cell.
- FIG. 1 is a schematic diagram of a network architecture of a multi-antenna system in the prior art. Taking user 0 and user 5 in FIG. 1 as an example, user 0 and user 5 are respectively located in the signal coverage range of cell 0 and cell 2, and user 0 and user 5 are respectively connected to cell 0 and cell 2. In communication, User 0 and User 5 receive control channels and data channels from the respective cells in which they are located.
- the inter-cell joint precoding may be used in the multi-antenna system for space division multiplexing of the multi-user data channel, wherein the weights used for inter-cell joint pre-coding may be generated according to the user channel state information participating in the space division multiplexing. .
- FIG. 2 is a schematic diagram of data channel space division multiplexing in the network architecture shown in FIG. 1.
- user 0 and user 5 are still taken as an example.
- User 0 and user 5 are respectively a user equipment in cell 0 and cell 2, and user 0 and user 5 respectively receive control letters from respective cells.
- the data channel is from cell 0 to cell 2, and space division multiplexing of the data channel is implemented.
- space division multiplexing of the data channel can be implemented by using the inter-cell joint precoding method, and the control channel still needs to perform natural space division multiplexing by means of spatial separation between cells.
- the cell-level pilots of different cells are different, and the user-level pilots of different UEs are different.
- the demodulation of the control channel is generally based on the cell-level pilot.
- the PDCCH Physical Downlink Control Channel
- CRS Cell Reference Signal
- Data channel demodulation can be based on cell-level pilots, such as PDSCH (Physical Downlink Shared Channel) in TM4 in LTE R8/9/10, or based on user-level pilots, such as LTE R8/9/ 10 PDSCH under TM7.
- PDSCH Physical Downlink Shared Channel
- TM4 Physical Downlink Shared Channel
- user-level pilots such as LTE R8/9/ 10 PDSCH under TM7.
- each cell control channel Since the capacity of each cell control channel is limited (for example, the PDCCH in LTE R8/9/10 can only use only 3 symbols at most), if the control channel also wants to perform joint precoding between cells, in order to demodulate the control channel It is necessary to perform the same joint precoding for the cell-level pilot. In this case, if multiple UEs in a cell participate in space division multiplexing, the UEs in the cell use the same cell-level pilot, so they cannot pass.
- the precoding weights are distinguished, and the channel estimation of the pilots has interference, which affects the accuracy of the channel estimation.
- the demodulation performance of the control channel is degraded or even demodulated, so the control channel cannot be co-pre-coded by inter-cell.
- Sub-multiplexing that is, the control channel capacity cannot be increased by precoding weighting.
- the data channel can be demodulated based on user-level pilots. Since the user-level pilots of each UE are different, there is no problem of cell-level pilot channel estimation, and with the number of antennas. Increasingly, the number of UEs that can be multiplexed by joint precoding will continue to increase, but since the control channel cannot be similarly multiplexed, the capacity of the control channel limits the number of multiplexed UEs.
- a new cell division mode can be adopted in the multi-antenna system. Different from the above division manner, in this new division mode, the antennas are no longer fixedly grouped by cell, and the antenna used by each cell is determined by the joint precoding weight, wherein the joint precoding weight is based on the participation air separation.
- the multiplexed user channel state information is generated, and the cell moves with the movement of the UE.
- the number of UEs allowed to be accessed by the cell is further limited.
- FIG. 3 shows a possible structure diagram of a multi-antenna system to which an embodiment of the present invention is applied. Figure.
- the cell-level pilot can perform full-band space division multiplexing by performing joint precoding between cells, and there is no original system cell level.
- the channel estimation problem of the pilot so the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the user-level guide.
- the problem of frequency overhead is not only solves the problem that the control channel capacity is limited, but also solves the user-level guide.
- a cell may be divided into two types of cells according to the number of UEs accessed in the cell, a cell without a UE is referred to as an idle cell, and a cell having one UE is referred to as a non-idle cell.
- FIG. 4 is a schematic diagram of cell type conversion in a multi-antenna system according to an embodiment of the present invention. As can be seen from FIG. 4, an idle cell can be used to access a new UE, and when a new UE is accessed in the idle cell, It becomes a non-idle cell; when a non-idle cell disconnects all UEs, the non-idle cell becomes an idle cell.
- the embodiment of the present invention provides a method for supporting a UE to access a multi-antenna system.
- the UE requests access to the multi-antenna system, it can determine whether the UE can access the UE.
- the system In the idle cell, if the current UE cannot access the idle cell, the system generates an idle cell and instructs the current UE to access the idle cell, thereby controlling the coverage and the cell of the cell during the UE access process.
- the number of UEs accessed in the system is satisfied, and the multi-antenna system is used to perform space division multiplexing on the control channel to solve the problem that the control channel capacity of the multi-antenna system is limited, and the user-level guide can also be solved.
- the problem of frequency overhead is satisfied, and the multi-antenna system is used to perform space division multiplexing on the control channel to solve the problem that the control channel capacity of the multi-antenna system is limited, and the user-level guide can also be solved.
- embodiments of the present invention provide an implementation of a method of accessing a multi-antenna system as follows.
- the embodiments of the present invention can be applied to a communication system such as a cellular system, a wifi, or a wimax.
- the network elements involved in the embodiments of the present invention are a long-term evolved base station LTE eNB, a WiFi AP (WiFi Wireless Access Point, wireless access in wireless fidelity). Incoming point), WiMAX BS (base station of Worldwide Interoperability for Microwave Access).
- LTE eNB long-term evolved base station
- WiFi AP WiFi Wireless Access Point, wireless access in wireless fidelity
- Incoming point WiMAX BS (base station of Worldwide Interoperability for Microwave Access).
- WiMAX BS base station of Worldwide Interoperability for Microwave Access
- the executor of the method in this embodiment may be an LTE eNB, and the method mainly includes:
- Step S11 During the process of the UE accessing the cell, determine whether the UE can access the idle cell that already exists in the system.
- the UE To access the multi-antenna system, the UE must perform cell search, acquire cell system information, random access, RRC (Radio Resource Control) connection, and Attach connection.
- RRC Radio Resource Control
- the main purpose of the cell search includes: 1) synchronizing the frequency and symbol with the cell; 2) acquiring the system frame timing, that is, the starting position of the downlink frame; and 3) determining the PCI (Physical-layer Cell Identity) of the cell. Identification).
- PCI Physical-layer Cell Identity
- the UE After the UE selects to synchronize with one cell through the cell search, it receives the system message broadcast by the cell, and initiates the process of accessing the cell by using the received system message.
- the eNB may determine whether the UE can access the existing idle cell in the system, for example, the UE searches through the cell, and selects the accessed cell as an existing idle cell in the system.
- the UE and the cell both have access conditions.
- the eNB can determine that the UE can access the idle cell and can directly access the access. For example, after the UE searches through the cell, the selected cell is not idle. a cell, but there is an idle cell with a UE access condition in the current system.
- the eNB may allow the UE to access the idle cell currently existing in the system by means of cell reselection, handover, etc., in this case, Determining that the UE can access the idle cell.
- the idle cell that is already in the system is generated according to channel state information of the terminal device that is accessed by each non-idle cell in the system, and the non-idle cell is at least A cell accessed by a user.
- the eNB determines that the UE cannot access the idle cell.
- Step S12 If the UE cannot access the idle cell already existing in the system, a new idle cell is generated.
- the eNB determines that the current UE cannot access the idle cell already existing in the system, a new idle cell is generated, and the current UE is accessed into the new idle cell by a subsequent indication step.
- the method for generating a new idle cell in the embodiment of the present invention may be generated by selecting different methods according to actual needs.
- a method for generating a new idle cell is provided as an example in this embodiment.
- the step of generating a new idle cell may include: acquiring a channel of the UE Status information; determining inter-cell association based on channel state information Combining precoding; determining cell attribute information according to inter-cell joint precoding.
- the cell attribute information may be, for example, a physical cell identifier PCI, a frequency of a cell, or the like, and content related to the defined cell.
- Step S13 Send an indication message to the UE, so that the UE accesses the new idle cell according to the indication message.
- the eNB After the eNB generates a new idle cell, it sends an indication message to the UE, and the UE accesses the new idle cell according to the received indication message.
- the control channel can perform joint precoding between cells based on cell-level pilots, and there is no channel estimation of the original system cell-level pilot.
- the problem is that the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the problem of user-level pilot overhead.
- the cell structure shown in FIG. 3 is formed.
- the eNB In the process of requesting access by the UE, the eNB first determines whether the UE can access the idle state. The cell may be determined by the eNB performing cell access interaction with the UE, such as performing RRC access interaction, Attach access interaction, and random access interaction. In the process of performing the access interaction between the eNB and the UE, the eNB can determine whether the UE accesses the idle cell, and can obtain the channel state information of the UE during the UE access process, thereby providing information support for generating a new idle cell. .
- the eNB determines whether the UE accesses the idle cell or the non-idle cell during the RRC connection process of the UE, and the eNB acquires the UE in the UE access process.
- Channel state information when the eNB determines that the UE accesses the non-idle cell, after the RRC connection of the UE is completed, generates a new idle cell according to the acquired UE channel state information, and indicates the UE currently accessing the non-idle cell. Connect to the new idle cell through the reselection process.
- the executor of the method for the UE to access the multi-antenna system in this embodiment may be an LTE eNB, and the main processing steps include:
- Step S21 Perform an RRC connection establishment interaction with the UE.
- Step S22 After receiving the RRC connection setup complete message sent by the UE, determining that the UE is connected Whether it is an idle cell or a non-idle cell.
- Step S23 After determining that the UE accesses the non-idle cell, generate a new idle cell.
- the eNB determines that the UE has accessed the non-idle cell, and at this time, the non-idle cell includes at least two UEs.
- the eNB acquires channel state information of the UE in the process of establishing an RRC connection with the non-idle cell, and may generate a new idle cell according to the channel state information of the UE.
- the antenna used by the new idle cell is used.
- the beam is aligned with the current UE.
- Step S24 Send an RRC Connection Release message of the non-idle cell to the UE.
- the eNB After the eNB determines that the UE establishes a connection with the non-idle cell through the RRC connection, the eNB sends a connection release message to the UE to indicate that the UE disconnects the RRC connection with the current non-idle cell, and if there are only two UEs in the non-idle cell accessed by the UE, After the UE disconnects from the non-idle cell, the non-idle cell becomes a cell that accesses only one UE.
- Step S25 Perform cell reselection interaction with the UE, so that the UE accesses the new idle cell.
- the cell is re-searched. Since the newly generated idle cell is a new cell generated according to the channel state information of the UE and used for pairing with the current UE, in the cell searched by the UE, according to the UE.
- the new idle cell generated by the UE channel state information is most consistent with the access condition of the UE, and the UE accesses the new idle cell through the cell reselection access procedure.
- FIG. 7 is a signaling flowchart of a UE performing an RRC connection interaction with an eNB, generating a new idle cell, and accessing a UE to a new idle cell, including:
- the UE sends an RRC connection request to the eNB, where the RRC connection request may carry information such as an initial identifier of the UE and a reason for establishing the UE.
- the eNB After receiving the RRC connection request sent by the UE, the eNB sends an RRC Connection Setup message to the UE, where the RRC connection setup message may include establishing complete configuration information that the UE is connected to the requested non-idle cell RRC.
- the eNB After receiving the RRC connection setup complete message, the eNB confirms that the UE completes the RRC connection with the non-idle cell, thereby generating a new idle cell according to the UE channel state information obtained during the exchange with the UE.
- S206-S208 After receiving the message of releasing the RRC connection, the UE searches for the cell again. Since the newly generated cell is generated according to the channel state information of the UE, the UE generally satisfies the access condition of the UE, so the UE accesses the new cell through the cell search. In the generated cell, the RRC connection with the new idle cell is started, and the RRC connection process between the UE and the new idle cell is the same as the steps S201 to S203, and details are not described herein.
- the eNB determines whether the UE accesses the idle cell or the non-idle cell during the Attach connection process of the UE, and the eNB acquires the UE during the UE access process.
- Channel state information when the eNB determines that the UE accesses the non-idle cell, after the Attach connection of the UE is completed, generates a new idle cell according to the acquired UE channel state information, and indicates the UE currently accessing the non-idle cell. Switch to the new idle cell through the handover procedure.
- the executor of the method for accessing the multi-antenna system of the UE in this embodiment may be an LTE eNB, and the main processing steps include:
- Step S31 Perform an Attach connection with the UE to establish an interaction.
- Step S32 After receiving the Attach Complete message sent by the UE, determining whether the UE accesses the idle cell or the non-idle cell;
- the eNB determines that the UE has accessed the non-idle cell, and at this time, the non-idle cell includes at least two UEs.
- Step S33 After determining that the UE accesses the non-idle cell, generate a new idle cell.
- the eNB acquires channel state information of the UE in the process of establishing an Attach connection with the non-idle cell, and may generate a new idle cell according to the channel state information of the UE.
- the new idle cell is used.
- the beam of the antenna is aligned with the current UE.
- Step S34 Send an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message includes the identification information of the new idle cell.
- the eNB in order to enable the UE to switch from the currently accessed non-idle cell to the new idle cell, the eNB sends an RRC connection reconfiguration message to the UE, thereby The UE is handed over to the new idle cell by RRC reconfiguration.
- the RRC reconfiguration message sent by the eNB to the UE includes the identification information of the new idle cell. Interest, such as PCI.
- the UE After receiving the RRC reconfiguration message, the UE re-establishes the RRC connection with the idle cell according to the identifier information of the idle cell in the message, and sends an RRC connection reconfiguration response message to the eNB.
- Step S35 Receive an RRC connection reconfiguration response message sent by the UE to access the UE to the new idle cell.
- the eNB After receiving the RRC connection reconfiguration response message sent by the UE, the eNB confirms that the UE has established an RRC connection with the new idle cell, and determines that the UE accesses the new idle cell.
- a signaling flowchart of a UE performing an Attach connection interaction with an eNB, generating a new idle cell, and accessing the UE to a new idle cell includes:
- S302 The eNB sends a message to the UE to establish an RRC connection.
- S304 The eNB sends an RR connection reconfiguration message to the UE, where the message carries the Attach default bearer information.
- S305 The UE sends an RRC connection reconfiguration message to the eNB.
- S306 The UE sends an Attach Connection Complete message to the eNB.
- the eNB sends an RRC connection reconfiguration message to the UE.
- the eNB performs connection and interaction between the UE and the non-idle cell in order to acquire the channel state information of the UE.
- the eNB acquires the channel state information of the UE in the process of the connection between the UE and the non-idle cell.
- the time taken to acquire the channel state information of the UE is longer.
- the time for the UE to finally access the new idle cell will be relatively long.
- the UE determines whether the UE accesses the idle cell in the random access phase of the UE, and acquires the channel state information of the UE in the random access process of the UE.
- the new free cell provides information support.
- the executor of the method for accessing the multi-antenna system of the present implementation may be an LTE eNB, and the main processing steps include:
- Step S41 Receive a random access request sent by the UE.
- Step S42 Determine whether there is an idle cell that the UE can access in the system.
- Step S43 When there is no idle cell in the system that the UE can randomly access, a new idle cell is generated.
- Step S44 Send a random access response to the UE, where the random access response includes the identifier information of the new idle cell, so that the UE accesses the new idle cell according to the identifier information.
- the eNB acquires the user channel state information of the UE in the random access process of the UE, and avoids the process of the RRC connection and the Attach connection between the UE and the non-idle cell, thereby shortening the acquisition of the channel state of the UE.
- the time of the information finally simplifies the process of the UE accessing the new idle cell, and shortens the time for the UE to access the idle cell.
- a signaling flowchart of a UE performing a random access interaction, generating a new idle cell, and accessing a UE to a new idle cell includes:
- S401 The UE sends a random access preamble (Random Access Preamble) message to the eNB.
- a random access preamble Random Access Preamble
- the eNB may select some or all of the 64 Preamble codes for contention access; and the random access preamble sequence message is carried in a PRACH (Physical Random Access Channel).
- PRACH Physical Random Access Channel
- the eNB After receiving the random access preamble sequence message, the eNB acquires channel state information of the UE according to the PRACH of the UE, and generates a new idle cell according to the obtained channel state information of the UE.
- the eNB sends a random access response message (Random Access Response) to the UE, where the sent random access response message includes the identifier information of the new idle cell, such as the PCI of the new idle cell.
- Random Access Response the random access response message
- S404 The UE re-searches according to the identifier information of the new cell in the received random access response message to access the new idle cell.
- the bandwidth of the random access channel used by the UE in the random access process is 6 RBs, which cannot meet the requirement for obtaining full-bandwidth channel state information. Therefore, the bandwidth of the random access channel can be modified from 6 RBs to account for The number of RBs of the full system bandwidth, so that the eNB can acquire the channel state information of the full bandwidth when receiving the random access channel of the UE.
- Embodiment 12 is a schematic structural diagram of Embodiment 1 of an apparatus for accessing a multi-antenna system according to the present invention.
- the apparatus is deployed in a multi-antenna system, and performs cell-level pilot and control channel weighting by using inter-cell joint precoding; the apparatus includes: determining The module 51, the new cell generation module 52, and the first access module 53.
- the determining module 51 is configured to determine, in the process of the terminal device accessing the cell, whether the terminal device can access the existing idle cell in the access system.
- the idle cell is a cell with no user access; the new cell generating module 52 is configured to generate a new idle cell when the terminal device cannot access the idle cell already existing in the system; the first access module 53 is configured to: Sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
- the device for accessing the multi-antenna system further includes: a second access module, configured to access the terminal device to the idle cell where the system already exists, directly or through the non-idle cell, where the system already exists
- the idle cell is generated according to channel state information of the terminal device that is accessed by each non-idle cell in the system, and the non-idle cell is a cell that has at least one user access.
- Embodiment 13 is a schematic structural diagram of Embodiment 2 of an apparatus for accessing a multi-antenna system according to the present invention.
- the apparatus is deployed in a multi-antenna system, and uses cell-to-cell joint pre-coding to weight cell-level pilot and control channels.
- the apparatus includes: determining The functions of the module 51, the new cell generation module 52, and the first access module 53 are the same as those of the foregoing device embodiment 1, and are not described again.
- the new cell generating module 52 includes: an information acquiring unit 521, an encoding determining unit 522, and a cell generating unit 523.
- the information acquiring unit 521 is configured to acquire channel state information of the terminal device
- the encoding determining unit 522 is configured to:
- the inter-cell joint precoding is determined according to the channel state information
- the cell generating unit 523 is configured to determine the cell attribute information according to the inter-cell joint precoding.
- the determining module 51 includes: an interaction unit 511, configured to perform cell access interaction with the terminal device, and a first attribute determining unit 512, configured to determine whether the terminal device accesses the idle cell or the non-idle cell.
- the interaction unit 511 is specifically configured to perform a radio resource control RRC connection establishment interaction with the terminal device.
- the first attribute determining unit 512 is specifically configured to: after receiving the RRC connection setup complete message sent by the terminal device, determine Whether the terminal device accesses an idle cell or a non-idle cell.
- the first access module 53 is specifically configured to send an RRC connection release message of the non-idle cell to the terminal device, and perform cell reselection interaction with the terminal device, so that the terminal device accesses the new idle cell.
- the interaction unit 511 is specifically configured to perform an Attach connection establishment interaction with the terminal device.
- the first attribute determining unit 512 is specifically configured to determine, after receiving the Attach completion message sent by the terminal device, the terminal device accessing. Whether it is an idle cell or a non-idle cell.
- the first access module 53 is specifically configured to send an RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the cell identifier information of the new idle cell, and is used to receive the sending by the terminal device.
- the RRC connects the reconfiguration response message to enable the terminal device to access the new idle cell according to the cell identity information.
- the determining module 51 is specifically configured to receive a random access request sent by the terminal device, and to determine whether the terminal device can access the idle cell.
- the first access module 53 is specifically configured to send a random access response to the terminal device, where the random access response includes the cell identity information of the new idle cell, so that the terminal device accesses according to the cell identity information. New free cell.
- FIG. 14 is a schematic structural diagram of Embodiment 1 of an access device according to the present invention.
- the device is applied to a multi-antenna system, including: the access device 1400 includes a communication interface 1401, a memory 1403, and a processor 1402, wherein the communication interface 1401 processes
- the device 1402 and the memory 1403 are connected to each other through a bus 1404.
- the bus 1404 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
- PCI peripheral component interconnect
- EISA extended industry standard architecture
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.
- the communication interface 1401 is for communicating with the transmitting end.
- the memory 1403 is configured to store a program.
- the program can include program code, the program code including computer operating instructions.
- the memory 1403 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
- the processor 1402 executes the program stored in the memory 1403 to implement the method of the foregoing method embodiment of the present invention:
- the terminal device In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
- the processor 1402 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP Processor, etc.), or a digital signal processor (DSP), an application specific integrated circuit. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
- CPU central processing unit
- NP Processor network processor
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA Field Programmable Gate Array
- the device is an enhanced base station eNB in the LTE system, a WiFi wireless access point AP in the wireless fidelity system, or a base station BS in the global microwave interconnection access WiMAX.
- the functions of the device for accessing the multi-antenna system and the access device of the embodiment of the present invention are the same as those of the foregoing method, and are not repeatedly described.
- the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
- the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
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Abstract
The present invention provides a method, device and apparatus for accessing a multiple-antenna system, the method comprising: in a process of a user equipment (UE) accessing a cell, determining whether or not the UE can access an idle cell, wherein the idle cell is a cell not accessed by a user; if the UE cannot access the idle cell, then generating a new idle cell; sending to the UE an instruction message, such that the UE accesses the new idle cell according to the instruction message. When applying the above method in a multiple-antenna system, in a cell configuration formed by using the above method, a control channel can perform joint precoding between cells on the basis of a cell-level pilot, resolving the problem of control channel capacity limits and user-level pilot overheads.
Description
本发明涉及通信技术,尤其涉及一种接入多天线系统的方法、装置及设备。The present invention relates to communication technologies, and in particular, to a method, device and device for accessing a multi-antenna system.
多天线又叫阵列天线。它由在空间按照一定的几何形状排列的多个振元组成。每个振元都可以独立地接收和发射信号。多天线技术主要分为MIMO(Multi-Input&Multi-Output,多输入多输出)技术和智能天线技术两大类。如今,业内人士已经达成共识,多天线技术是未来移动通信系统(3G、B3G、4G和LTE)以及宽带无线接入系统中所要使用的主流技术。它的许多优点如系统容量大、频谱利用率高、信号传输速率快等都是解决现有无线通信系统存在问题的较好较好替代方法。Multiple antennas are also called array antennas. It consists of a number of vibrating elements arranged in a space according to a certain geometry. Each element can receive and transmit signals independently. Multi-antenna technology is mainly divided into two major categories: MIMO (Multi-Input & Multi-Output) technology and smart antenna technology. Today, industry insiders have reached a consensus that multi-antenna technology is the mainstream technology to be used in future mobile communication systems (3G, B3G, 4G and LTE) and broadband wireless access systems. Many of its advantages, such as large system capacity, high spectrum utilization, and fast signal transmission rate, are better alternatives to the existing wireless communication systems.
在多天线系统中,基于天线位置划分小区,每个小区覆盖一定的范围,位于小区覆盖范围内的UE(User Equipment,用户设备)接入到其自身所位于的小区内。UE可以解调所在小区的控制信道来获取数据信道的基本信息,例如可以获取调制编码方式、资源分配方式等控制信息,然后再根据这些控制信息来解调数据信道,从而可以在接入的小区内与对应天线通信。In a multi-antenna system, a cell is divided based on an antenna position, and each cell covers a certain range, and a UE (User Equipment) located in a cell coverage area accesses a cell in which the UE is located. The UE may demodulate the control channel of the cell to obtain basic information of the data channel, for example, may obtain control information such as a modulation and coding mode and a resource allocation mode, and then demodulate the data channel according to the control information, so that the UE may be in the accessed cell. Communicate with the corresponding antenna.
发明内容Summary of the invention
本发明实施例提供一种接入多天线系统的方法、装置及设备,以形成一种能够实现控制信道空分复用的小区结构。Embodiments of the present invention provide a method, device, and device for accessing a multi-antenna system to form a cell structure capable of implementing space division multiplexing of a control channel.
第一方面,本发明实施例提供了一种接入多天线系统的方法,所述多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;In a first aspect, an embodiment of the present invention provides a method for accessing a multi-antenna system, where the inter-cell joint precoding is used to weight a cell-level pilot and a control channel;
所述方法,包括:The method includes:
在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
若所述终端设备不能接入系统中已经存在的空闲小区,则生成新的空闲
小区;Generating new idle if the terminal device cannot access the idle cell already existing in the system
Community
向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。And sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
可选的,所述方法还包括:将终端设备直接或通过非空闲小区接入到系统已经存在的空闲小区中,其中,系统中已经存在的所述空闲小区为根据系统中各非空闲小区已接入的终端设备的信道状态信息生成,所述非空闲小区为已有至少一个用户接入的小区。Optionally, the method further includes: accessing the terminal device to the idle cell where the system already exists, directly or through the non-idle cell, where the idle cell already existing in the system is according to each non-idle cell in the system. The channel state information of the accessed terminal device is generated, and the non-idle cell is a cell that has at least one user access.
可选的,所述生成新的空闲小区,包括:Optionally, the generating a new idle cell includes:
获取所述终端设备的信道状态信息;Obtaining channel state information of the terminal device;
根据所述信道状态信息确定小区间联合预编码;Determining inter-cell joint precoding according to the channel state information;
根据所述小区间联合预编码确定小区属性信息。Cell attribute information is determined according to the inter-cell joint precoding.
可选的,所述在终端设备接入小区的过程中,确定所述终端设备是否能接入系统中已经存在的空闲小区,包括:Optionally, in the process of the terminal device accessing the cell, determining whether the terminal device can access the existing idle cell in the system includes:
与终端设备进行小区接入交互;Performing cell access interaction with the terminal device;
确定所述终端设备接入的是空闲小区还是非空闲小区。Determining whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述与终端设备进行小区接入交互,包括:Optionally, the performing cell access interaction with the terminal device includes:
与所述终端设备进行无线资源控制RRC连接建立交互;Establishing an interaction with the terminal device for performing radio resource control RRC connection;
相应的,所述确定所述终端设备接入的是空闲小区还是非空闲小区,包括:Correspondingly, the determining whether the terminal device accesses an idle cell or a non-idle cell includes:
在接收到所述终端设备发送的RRC连接建立完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。After receiving the RRC connection setup complete message sent by the terminal device, determining whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:Optionally, the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message, includes:
向所述终端设备发送所述非空闲小区的RRC连接释放消息;Sending, to the terminal device, an RRC connection release message of the non-idle cell;
与所述终端设备进行小区重选交互,以使所述终端设备接入所述新的空闲小区。Performing cell reselection interaction with the terminal device to enable the terminal device to access the new idle cell.
可选的,所述与终端设备进行小区接入交互,包括:Optionally, the performing cell access interaction with the terminal device includes:
与所述终端设备进行Attach连接建立交互;Establishing an interaction with the terminal device to establish an interaction;
相应的,所述确定所述终端设备接入的是空闲小区还是非空闲小区,包括:
Correspondingly, the determining whether the terminal device accesses an idle cell or a non-idle cell includes:
在接收到所述终端设备发送的Attach完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。After receiving the Attach Complete message sent by the terminal device, determining whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:Optionally, the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message, includes:
向所述终端设备发送RRC连接重配置消息,所述RRC连接重配置消息中包含所述新的空闲小区的小区标识信息;Sending, to the terminal device, an RRC connection reconfiguration message, where the RRC connection reconfiguration message includes cell identification information of the new idle cell;
接收所述终端设备发送的RRC连接重配置响应消息,以使所述终端设备根据所述小区标识信息接入到所述新的空闲小区。And receiving an RRC connection reconfiguration response message sent by the terminal device, so that the terminal device accesses the new idle cell according to the cell identity information.
可选的,所述在终端设备接入小区的过程中,确定所述终端设备是否能够接入系统中已经存在的空闲小区,包括:Optionally, in the process of the terminal device accessing the cell, determining whether the terminal device can access the existing idle cell in the system includes:
接收所述终端设备发送的随机接入请求;Receiving a random access request sent by the terminal device;
确定所述终端设备是否能够接入系统中已经存在的空闲小区。Determining whether the terminal device can access an idle cell that already exists in the system.
可选的,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:Optionally, the sending, by the terminal device, an indication message, to enable the terminal device to access the new idle cell according to the indication message, includes:
向所述终端设备发送随机接入响应,所述随机接入响应中包含所述新的空闲小区的小区标识信息,以使所述终端设备根据所述小区标识信息接入所述新的空闲小区。Sending a random access response to the terminal device, where the random access response includes cell identification information of the new idle cell, so that the terminal device accesses the new idle cell according to the cell identity information. .
第二方面,本发明实施例提供一种接入多天线系统的装置,该装置部署于多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;In a second aspect, an embodiment of the present invention provides an apparatus for accessing a multi-antenna system, where the apparatus is deployed in a multi-antenna system, and uses cell-to-cell joint pre-coding to weight cell-level pilot and control channels;
所述装置,包括:The device includes:
确定模块,用于在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;a determining module, configured to determine, in a process in which the terminal device accesses the cell, whether the terminal device can access an existing idle cell in the access system, where the idle cell is a cell that has no user access;
新小区生成模块,用于所述终端设备不能接入系统中已经存在的空闲小区时,生成新的空闲小区;a new cell generation module, configured to generate a new idle cell when the terminal device cannot access an existing idle cell in the system;
第一接入模块,用于向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。The first access module is configured to send an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
可选的,该装置还包括:第二接入模块,用于将终端设备直接或通过非空闲小区接入到系统已经存在的空闲小区中,其中,系统中已经存在的所述空闲小区为根据系统中各非空闲小区已接入的终端设备的信道状态信息生成,
所述非空闲小区为已有至少一个用户接入的小区。Optionally, the device further includes: a second access module, configured to access the terminal device directly or through a non-idle cell to an idle cell that is already in the system, where the idle cell that is already in the system is Channel state information of terminal devices that have been accessed by each non-idle cell in the system,
The non-idle cell is a cell that has been accessed by at least one user.
可选的,所述新小区生成模块包括:Optionally, the new cell generation module includes:
信息获取单元,用于获取所述终端设备的信道状态信息;An information acquiring unit, configured to acquire channel state information of the terminal device;
编码确定单元,用于根据所述信道状态信息确定小区间联合预编码;An encoding determining unit, configured to determine inter-cell joint precoding according to the channel state information;
小区生成单元,用于根据所述小区间联合预编码确定小区属性信息。a cell generating unit, configured to determine cell attribute information according to the inter-cell joint precoding.
可选的,所述确定模块,包括:Optionally, the determining module includes:
交互单元,用于与终端设备进行小区接入交互;An interaction unit, configured to perform cell access interaction with the terminal device;
第一属性确定单元,用于确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is configured to determine whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述交互单元,具体用于与所述终端设备进行无线资源控制RRC连接建立交互;Optionally, the interaction unit is specifically configured to perform radio resource control RRC connection establishment interaction with the terminal device;
所述第一属性确定单元,具体用于在接收到所述终端设备发送的RRC连接建立完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is specifically configured to determine, after receiving the RRC connection setup complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述第一接入模块,具体用于向所述终端设备发送所述非空闲小区的RRC连接释放消息;以及用于与所述终端设备进行小区重选交互,以使所述终端设备接入所述新的空闲小区。Optionally, the first access module is specifically configured to send an RRC connection release message of the non-idle cell to the terminal device, and perform cell reselection interaction with the terminal device, so that the The terminal device accesses the new idle cell.
可选的,所述交互单元,具体用于与所述终端设备进行Attach连接建立交互;Optionally, the interaction unit is specifically configured to perform an Attach connection establishment interaction with the terminal device.
所述第一属性确定单元,具体用于在接收到所述终端设备发送的Attach完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is configured to determine, after receiving the Attach Complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
可选的,所述第一接入模块,具体用于向所述终端设备发送RRC连接重配置消息,所述RRC连接重配置消息中包含所述新的空闲小区的小区标识信息;以及用于接收所述终端设备发送的RRC连接重配置响应消息,以使所述终端设备根据所述小区标识信息接入到所述新的空闲小区。Optionally, the first access module is configured to send an RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes cell identification information of the new idle cell, and And receiving an RRC connection reconfiguration response message sent by the terminal device, so that the terminal device accesses the new idle cell according to the cell identity information.
可选的,所述确定模块,具体用于接收所述终端设备发送的随机接入请求;以及用于确定所述终端设备是否能够接入空闲小区。Optionally, the determining module is specifically configured to receive a random access request sent by the terminal device, and to determine whether the terminal device can access the idle cell.
可选的,所述第一接入模块,具体用于向所述终端设备发送随机接入响应,所述随机接入响应中包含所述新的空闲小区的小区标识信息,以使所述终端设备根据所述小区标识信息接入所述新的空闲小区。Optionally, the first access module is configured to send a random access response to the terminal device, where the random access response includes cell identification information of the new idle cell, so that the terminal The device accesses the new idle cell according to the cell identity information.
第三方面,本发明实施例提供了一种接入设备,该设备应用于多天线系
统中,包括:In a third aspect, an embodiment of the present invention provides an access device, where the device is applied to multiple antenna systems.
In the system, including:
通信接口、存储器和处理器和通信总线,其中,所述通信接口、所述存储器和所述处理器通过所述通信总线通信;a communication interface, a memory and a processor, and a communication bus, wherein the communication interface, the memory, and the processor communicate via the communication bus;
所述存储器用于存放程序,所述处理器用于执行所述存储器存储的程序;当所述空分复用处理装置运行时,所述处理器运行程序,所述程序包括:The memory is used to store a program, the processor is configured to execute the program stored by the memory; when the space division multiplexing processing device is in operation, the processor runs a program, and the program includes:
在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
若所述终端设备不能接入系统中已经存在的空闲小区,则生成新的空闲小区;Generating a new idle cell if the terminal device cannot access an idle cell already existing in the system;
向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。And sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
可选的,所述设备为LTE系统中的增强基站eNB、无线保真系统中的WiFi无线访问接入点AP或全球微波互联接入WiMAX中的基站BS。Optionally, the device is an enhanced base station eNB in an LTE system, a WiFi wireless access point AP in a wireless fidelity system, or a base station BS in a global microwave interconnection access WiMAX.
本发明实施例的接入多天线系统的方法、装置及设备,可以限定每个小区中只接入一个终端设备,控制信道可以基于小区级导频在小区间进行联合预编码,不会存在原来系统小区级导频的信道估计问题,所以控制信道和数据信道可以同时基于小区级导频通过小区间做联合预编码进行空分复用,既解决了控制信道容量受限的问题,也解决了用户级导频开销的问题。The method, device and device for accessing a multi-antenna system according to an embodiment of the present invention can limit access to only one terminal device in each cell, and the control channel can perform joint precoding between cells based on cell-level pilots, and the original channel does not exist. The channel estimation problem of the system cell-level pilot, so the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the problem. User level pilot overhead issues.
图1为现有技术中多天线系统的一种网络架构示意图;1 is a schematic diagram of a network architecture of a multi-antenna system in the prior art;
图2为图1所示网络架构中数据信道空分复用的示意图;2 is a schematic diagram of data channel space division multiplexing in the network architecture shown in FIG. 1;
图3为本发明实施例所应用的多天线系统的一种可能的结构示意图;3 is a schematic structural diagram of a multi-antenna system according to an embodiment of the present invention;
图4为本发明实施例所应用的多天线系统中小区类型转换示意图;4 is a schematic diagram of cell type conversion in a multi-antenna system according to an embodiment of the present invention;
图5为本发明接入多天线系统的方法实施例一的流程图;5 is a flowchart of Embodiment 1 of a method for accessing a multi-antenna system according to the present invention;
图6为本发明接入多天线系统的方法实施例二的流程图;6 is a flowchart of Embodiment 2 of a method for accessing a multi-antenna system according to the present invention;
图7为图6所示方法实施例二的一种具体实现方案的信令流程图;7 is a signaling flowchart of a specific implementation of the second embodiment of the method shown in FIG. 6;
图8为本发明接入多天线系统的方法实施例三的流程图;8 is a flowchart of Embodiment 3 of a method for accessing a multi-antenna system according to the present invention;
图9为图8所示方法实施例三的一种具体实现方案的信令流程图;9 is a signaling flowchart of a specific implementation of the third embodiment of the method shown in FIG. 8;
图10为本发明接入多天线系统的方法实施例四的流程图;
10 is a flowchart of Embodiment 4 of a method for accessing a multi-antenna system according to the present invention;
图11为图10所示方法实施例四的一种具体实现方案的信令流程图;11 is a signaling flowchart of a specific implementation of Embodiment 4 of the method shown in FIG. 10;
图12为本发明接入多天线系统的装置实施例一的结构示意图;12 is a schematic structural diagram of Embodiment 1 of an apparatus for accessing a multi-antenna system according to the present invention;
图13位本发明接入多天线系统的装置实施例二的结构示意图;13 is a schematic structural diagram of Embodiment 2 of an apparatus for accessing a multi-antenna system according to the present invention;
图14为本发明接入设备实施例一的结构示意图。FIG. 14 is a schematic structural diagram of Embodiment 1 of an access device according to the present invention.
多天线技术由于具有系统容量大、频谱利用率高、信号传输速率快等诸多优点,成为未来移动通信系统以及宽带无线接入系统发展的重要方向。例如,MIMO技术已经成为LTE(Long Term Evolution,长期演进)系统中的关键技术,并显著增加了系统的频谱效率和数据传输速率。Multi-antenna technology has become an important direction for the development of mobile communication systems and broadband wireless access systems in the future due to its many advantages such as large system capacity, high spectrum utilization, and fast signal transmission rate. For example, MIMO technology has become a key technology in LTE (Long Term Evolution) systems, and significantly increases the spectrum efficiency and data transmission rate of the system.
为了实现系统资源的合理分配以及用户业务的合理调度,多天线系统中采用小区划分方式使UE接入到多天线系统中。In order to achieve reasonable allocation of system resources and reasonable scheduling of user services, the cell division mode is adopted in the multi-antenna system to enable the UE to access the multi-antenna system.
多天线系统中,小区划分的一种方式为,基于天线设置位置划分小区,每个小区均具有一定的信号覆盖范围,位于同一小区覆盖范围内的UE都会接入其自身所位于的同一小区内。In a multi-antenna system, a method of cell division is to divide a cell based on an antenna setting position, and each cell has a certain signal coverage range, and UEs located in the same cell coverage area access the same cell in which the UE is located. .
UE接入至其所在小区后,可以解调其所在小区的控制信道来获取数据信道的控制信息,例如可以获取调制编码方式及资源分配方式等控制信息,然后根据这些控制信息来解调数据信道,从而可以在接入的小区内与对应的天线进行通信。After accessing the cell to which the UE is located, the UE may demodulate the control channel of the cell in which it is located to obtain control information of the data channel, for example, obtaining control information such as a modulation and coding mode and a resource allocation mode, and then demodulating the data channel according to the control information. Thereby, communication with the corresponding antenna can be performed within the accessed cell.
如图1示出了现有技术中多天线系统的一种网络架构示意图。以图1中用户0和用户5为例,用户0和用户5分别位于小区0和小区2的信号覆盖范围内,用户0和用户5分别接入到小区0和小区2中。通信时,用户0和用户5分别从各自所位于的小区接收控制信道和数据信道。FIG. 1 is a schematic diagram of a network architecture of a multi-antenna system in the prior art. Taking user 0 and user 5 in FIG. 1 as an example, user 0 and user 5 are respectively located in the signal coverage range of cell 0 and cell 2, and user 0 and user 5 are respectively connected to cell 0 and cell 2. In communication, User 0 and User 5 receive control channels and data channels from the respective cells in which they are located.
为了提高系统用户容量,多天线系统中可以采用小区间联合预编码进行多用户数据信道的空分复用,其中小区间联合预编码所用权值可以根据参与空分复用的用户信道状态信息产生。In order to improve the system user capacity, the inter-cell joint precoding may be used in the multi-antenna system for space division multiplexing of the multi-user data channel, wherein the weights used for inter-cell joint pre-coding may be generated according to the user channel state information participating in the space division multiplexing. .
具体的,如图2示出了图1所示网络架构中数据信道空分复用的示意图。Specifically, FIG. 2 is a schematic diagram of data channel space division multiplexing in the network architecture shown in FIG. 1.
图2中,仍以用户0和用户5为例,用户0和用户5分别是小区0和小区2中的一个用户设备,用户0和用户5分别从各自所在的小区接收控制信
道,数据信道则来自于小区0~小区2,实现了数据信道的空分复用。In FIG. 2, user 0 and user 5 are still taken as an example. User 0 and user 5 are respectively a user equipment in cell 0 and cell 2, and user 0 and user 5 respectively receive control letters from respective cells.
The data channel is from cell 0 to cell 2, and space division multiplexing of the data channel is implemented.
因此,上述小区划分,可以采用小区间联合预编码方式实现数据信道的空分复用,控制信道则仍需要以小区间空间隔离的方式进行天然的空分复用。Therefore, in the foregoing cell division, space division multiplexing of the data channel can be implemented by using the inter-cell joint precoding method, and the control channel still needs to perform natural space division multiplexing by means of spatial separation between cells.
不同小区的小区级导频均不同,不同UE的用户级导频均不同。控制信道的解调一般是基于小区级导频,例如LTE R8/9/10中PDCCH(Physical Downlink Control Channel,物理下行控制信道)基于CRS(Cell Reference Signal,小区公共导频信号)解调。数据信道解调既可以基于小区级导频,例如LTE R8/9/10中TM4下的PDSCH(Physical Downlink Shared Channel,物理下行共享信道),也可以基于用户级导频,例如LTE R8/9/10中TM7下的PDSCH。The cell-level pilots of different cells are different, and the user-level pilots of different UEs are different. The demodulation of the control channel is generally based on the cell-level pilot. For example, the PDCCH (Physical Downlink Control Channel) in the LTE R8/9/10 is demodulated based on the CRS (Cell Reference Signal). Data channel demodulation can be based on cell-level pilots, such as PDSCH (Physical Downlink Shared Channel) in TM4 in LTE R8/9/10, or based on user-level pilots, such as LTE R8/9/ 10 PDSCH under TM7.
由于每个小区控制信道的容量都是有限的(例如LTE R8/9/10中PDCCH最多只能只用3个符号),如果控制信道也想通过小区间做联合预编码,为了解调控制信道就必须对小区级导频也做同样的联合预编码,此时如果一个小区里多个UE都参与了空分复用,因为小区内的UE使用的是相同的小区级导频,因此无法通过预编码权值进行区分,导频的信道估计就会存在干扰,影响信道估计的准确性,最后导致控制信道解调性能下降甚至无法解调,所以控制信道无法通过小区间做联合预编码进行空分复用,即无法通过预编码加权提升控制信道容量。Since the capacity of each cell control channel is limited (for example, the PDCCH in LTE R8/9/10 can only use only 3 symbols at most), if the control channel also wants to perform joint precoding between cells, in order to demodulate the control channel It is necessary to perform the same joint precoding for the cell-level pilot. In this case, if multiple UEs in a cell participate in space division multiplexing, the UEs in the cell use the same cell-level pilot, so they cannot pass. The precoding weights are distinguished, and the channel estimation of the pilots has interference, which affects the accuracy of the channel estimation. Finally, the demodulation performance of the control channel is degraded or even demodulated, so the control channel cannot be co-pre-coded by inter-cell. Sub-multiplexing, that is, the control channel capacity cannot be increased by precoding weighting.
如前所述,数据信道可以基于用户级导频进行解调,由于每个UE的用户级导频都是不一样的,所以不存在小区级导频信道估计的问题,而且随着天线数的不断增加,通过联合预编码能复用的UE数也会不断增加,但由于控制信道不能做类似的复用,所以控制信道的容量就会限制复用的UE数。As mentioned before, the data channel can be demodulated based on user-level pilots. Since the user-level pilots of each UE are different, there is no problem of cell-level pilot channel estimation, and with the number of antennas. Increasingly, the number of UEs that can be multiplexed by joint precoding will continue to increase, but since the control channel cannot be similarly multiplexed, the capacity of the control channel limits the number of multiplexed UEs.
由于数据信道使用了用户级导频,导致系统里既存在用户级导频也存在小区级导频,所以增加了这个系统的导频开销。Since the data channel uses user-level pilots, there are both user-level pilots and cell-level pilots in the system, thus increasing the pilot overhead of this system.
为了解决控制信道难以实现空分复用的问题,多天线系统中可以一种新的小区划分方式。不同于上述划分方式,在这种新的划分方式中,不再把天线按小区进行固定分组,每个小区使用的天线由联合预编码权值决定,其中联合预编码的权值根据参与空分复用的用户信道状态信息产生,小区会随着UE的移动而移动,除此之外,还进一步限定小区允许接入的UE数量。In order to solve the problem that the control channel is difficult to implement space division multiplexing, a new cell division mode can be adopted in the multi-antenna system. Different from the above division manner, in this new division mode, the antennas are no longer fixedly grouped by cell, and the antenna used by each cell is determined by the joint precoding weight, wherein the joint precoding weight is based on the participation air separation. The multiplexed user channel state information is generated, and the cell moves with the movement of the UE. In addition, the number of UEs allowed to be accessed by the cell is further limited.
如图3示出了本发明实施例所应用的多天线系统的一种可能的结构示意
图。FIG. 3 shows a possible structure diagram of a multi-antenna system to which an embodiment of the present invention is applied.
Figure.
从图3可以看出,当每个小区中最多只有一个UE时,即小区0、小区1及小区2中分别只有用户0、用户1及用户2一个UE时,等效于缩小了每个小区的覆盖范围,做到了用户级的精准覆盖,此时由于每个小区都只有一个UE,小区级导频可以通过小区间做联合预编码进行全频带空分复用,不会存在原来系统小区级导频的信道估计问题,所以控制信道和数据信道可以同时基于小区级导频通过小区间做联合预编码进行空分复用,既解决了控制信道容量受限的问题,也解决了用户级导频开销的问题。As can be seen from FIG. 3, when there is at most one UE in each cell, that is, only user 0, user 1 and user 2 in cell 0, cell 1 and cell 2, respectively, it is equivalent to narrowing down each cell. The coverage of the coverage is accurate at the user level. At this time, since there is only one UE in each cell, the cell-level pilot can perform full-band space division multiplexing by performing joint precoding between cells, and there is no original system cell level. The channel estimation problem of the pilot, so the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the user-level guide. The problem of frequency overhead.
本发明实施例中,根据小区里接入的UE个数可以将小区分为两种小区,没有UE的小区称为空闲小区,有一个UE的小区称为非空闲小区。如图4示出了本发明实施例所应用的多天线系统中小区类型转换示意图,从图4中可以看出,空闲小区可以用于接入新UE,当空闲小区中接入新UE后就变成非空闲小区;同理当非空闲小区断开所有UE的接入时,非空闲小区则变成为空闲小区。In the embodiment of the present invention, a cell may be divided into two types of cells according to the number of UEs accessed in the cell, a cell without a UE is referred to as an idle cell, and a cell having one UE is referred to as a non-idle cell. FIG. 4 is a schematic diagram of cell type conversion in a multi-antenna system according to an embodiment of the present invention. As can be seen from FIG. 4, an idle cell can be used to access a new UE, and when a new UE is accessed in the idle cell, It becomes a non-idle cell; when a non-idle cell disconnects all UEs, the non-idle cell becomes an idle cell.
基于上述多天线系统的小区架构说明,本发明实施例提供了一种支持UE接入多天线系统的方法,该方法中当UE请求接入多天线系统时,可以判断该UE是否能够接入到空闲小区中;如果当前的UE不能接入到空闲小区中,则系统会生成一个空闲小区,并指示当前UE接入至空闲小区,由此可以在UE接入过程中控制小区的覆盖范围及小区中接入的UE数量,得到满足图3所示的小区架构,进而支持多天线系统对控制信道进行空分复用,解决多天线系统控制信道容量受限的问题,同时也可以解决用户级导频开销的问题。Based on the cell architecture description of the multi-antenna system, the embodiment of the present invention provides a method for supporting a UE to access a multi-antenna system. When the UE requests access to the multi-antenna system, it can determine whether the UE can access the UE. In the idle cell, if the current UE cannot access the idle cell, the system generates an idle cell and instructs the current UE to access the idle cell, thereby controlling the coverage and the cell of the cell during the UE access process. The number of UEs accessed in the system is satisfied, and the multi-antenna system is used to perform space division multiplexing on the control channel to solve the problem that the control channel capacity of the multi-antenna system is limited, and the user-level guide can also be solved. The problem of frequency overhead.
具体地,本发明实施例提供了如下接入多天线系统的方法的实施方案。Specifically, embodiments of the present invention provide an implementation of a method of accessing a multi-antenna system as follows.
本发明实施例可以应用于蜂窝系统、wifi、wimax等通信系统,相应的,本发明实施例所涉及的网元为长期演进型基站LTE eNB、WiFi AP(WiFi WirelessAccessPoint,无线保真中的无线访问接入点)、WiMAX BS(Base Station of Worldwide Interoperability for Microwave Access全球微波互联接入中的基站)等。为方便起见,下述实施例均以LTE eNB为例进行说明。The embodiments of the present invention can be applied to a communication system such as a cellular system, a wifi, or a wimax. Correspondingly, the network elements involved in the embodiments of the present invention are a long-term evolved base station LTE eNB, a WiFi AP (WiFi Wireless Access Point, wireless access in wireless fidelity). Incoming point), WiMAX BS (base station of Worldwide Interoperability for Microwave Access). For the sake of convenience, the following embodiments are described by taking an LTE eNB as an example.
实施例一Embodiment 1
如图5所示,本实施例方法的执行主体可以是LTE eNB,主要包括:
As shown in FIG. 5, the executor of the method in this embodiment may be an LTE eNB, and the method mainly includes:
步骤S11:在UE接入小区的过程中,确定UE是否能够接入系统中已经存在的空闲小区。Step S11: During the process of the UE accessing the cell, determine whether the UE can access the idle cell that already exists in the system.
UE要接入多天线系统,必须经过小区搜索、获取小区系统信息、随机接入、RRC(Radio Resource Control,无线资源控制)连接及Attach连接等过程。To access the multi-antenna system, the UE must perform cell search, acquire cell system information, random access, RRC (Radio Resource Control) connection, and Attach connection.
其中,小区搜索的主要目的包括:1)与小区取得频率和符号同步;2)获取系统帧timing,即下行帧的起始位置;3)确定小区的PCI(Physical-layer Cell Identity,物理层小区标识)。The main purpose of the cell search includes: 1) synchronizing the frequency and symbol with the cell; 2) acquiring the system frame timing, that is, the starting position of the downlink frame; and 3) determining the PCI (Physical-layer Cell Identity) of the cell. Identification).
UE通过小区搜索选择与一个小区同步后,接收该小区广播的系统消息,并利用接收到的系统消息启动接入小区的过程。After the UE selects to synchronize with one cell through the cell search, it receives the system message broadcast by the cell, and initiates the process of accessing the cell by using the received system message.
其中,在UE接入小区的过程中,eNB可以确定UE是否能够接入到系统中已经存在的空闲小区中,例如UE经过小区搜索,选择接入的小区为一个系统中已经存在的空闲小区,且UE与小区均具备接入的条件,此时eNB可确定UE能够接入到该空闲小区中,并可直接进行接入;又例如,UE经过小区搜索,选择接入的小区为一个非空闲小区,但当前系统中还存在着具有UE接入条件的空闲小区,此时eNB可以让UE通过小区重选、切换等步骤接入到系统当前所存在的空闲小区中,此种情况下也可以确定UE能够接入到空闲小区中,优选的,系统中已经存在的空闲小区是根据系统中各非空闲小区已接入的终端设备的信道状态信息生成的,所述非空闲小区为已有至少一个用户接入的小区。In the process of the UE accessing the cell, the eNB may determine whether the UE can access the existing idle cell in the system, for example, the UE searches through the cell, and selects the accessed cell as an existing idle cell in the system. The UE and the cell both have access conditions. At this time, the eNB can determine that the UE can access the idle cell and can directly access the access. For example, after the UE searches through the cell, the selected cell is not idle. a cell, but there is an idle cell with a UE access condition in the current system. In this case, the eNB may allow the UE to access the idle cell currently existing in the system by means of cell reselection, handover, etc., in this case, Determining that the UE can access the idle cell. Preferably, the idle cell that is already in the system is generated according to channel state information of the terminal device that is accessed by each non-idle cell in the system, and the non-idle cell is at least A cell accessed by a user.
当UE选择接入的为一个非空闲小区,且当前系统也不存在具有接入条件的空闲小区时,则eNB确定UE不能够接入空闲小区。When the UE selects to access a non-idle cell, and the current system does not have an idle cell with an access condition, the eNB determines that the UE cannot access the idle cell.
步骤S12:若UE不能接入系统中已经存在的空闲小区,则生成新的空闲小区。Step S12: If the UE cannot access the idle cell already existing in the system, a new idle cell is generated.
当eNB判定当前UE不能接入系统中已经存在的空闲小区时,生成新的空闲小区,并通过后续指示步骤将当前UE接入到新的空闲小区中。When the eNB determines that the current UE cannot access the idle cell already existing in the system, a new idle cell is generated, and the current UE is accessed into the new idle cell by a subsequent indication step.
本发明实施例中生成新的空闲小区的方法可以根据实际需要选择不同的方法生成。为了对UE接入多天线系统的过程进行详细说明,本实施例中提供了一种生成新的空闲小区的方法作为示例,其中具体的,生成新的空闲小区的步骤可以包括:获取UE的信道状态信息;根据信道状态信息确定小区间联
合预编码;根据小区间联合预编码确定小区属性信息。其中,小区属性信息例如可以为物理小区标识PCI、小区的频点等等与定义小区相关的内容。The method for generating a new idle cell in the embodiment of the present invention may be generated by selecting different methods according to actual needs. In order to describe the process of the UE accessing the multi-antenna system, a method for generating a new idle cell is provided as an example in this embodiment. Specifically, the step of generating a new idle cell may include: acquiring a channel of the UE Status information; determining inter-cell association based on channel state information
Combining precoding; determining cell attribute information according to inter-cell joint precoding. The cell attribute information may be, for example, a physical cell identifier PCI, a frequency of a cell, or the like, and content related to the defined cell.
步骤S13:向UE发送指示消息,以使UE根据指示消息接入新的空闲小区。Step S13: Send an indication message to the UE, so that the UE accesses the new idle cell according to the indication message.
eNB生成新的空闲小区后,向UE发送指示消息,UE根据接收到的指示消息接入到新的空闲小区中。After the eNB generates a new idle cell, it sends an indication message to the UE, and the UE accesses the new idle cell according to the received indication message.
利用本实施例上述接入多天线系统的方法,限定每个小区中只有一个UE,控制信道可以基于小区级导频在小区间进行联合预编码,不会存在原来系统小区级导频的信道估计问题,所以控制信道和数据信道可以同时基于小区级导频通过小区间做联合预编码进行空分复用,既解决了控制信道容量受限的问题,也解决了用户级导频开销的问题。With the above method for accessing a multi-antenna system in this embodiment, only one UE in each cell is defined, and the control channel can perform joint precoding between cells based on cell-level pilots, and there is no channel estimation of the original system cell-level pilot. The problem is that the control channel and the data channel can simultaneously perform spatial division multiplexing by using the cell-level pilot to perform joint precoding between cells, which not only solves the problem that the control channel capacity is limited, but also solves the problem of user-level pilot overhead.
本发明实施例的接入多天线系统的方法中,为了使UE最终接入到空闲小区,形成图3所示小区结构,在UE请求接入的过程中,eNB首先确定UE是否能够接入空闲小区,其中判断的方法可以为,eNB与UE进行小区接入交互,如进行RRC接入交互、Attach接入交互以及随机接入交互等。eNB与UE进行接入交互的过程中,不仅可以确定UE接入的是否为空闲小区,还可以在UE接入的过程中获取到UE的信道状态信息,从而为生成新的空闲小区提供信息支持。In the method for accessing the multi-antenna system in the embodiment of the present invention, in order to enable the UE to finally access the idle cell, the cell structure shown in FIG. 3 is formed. In the process of requesting access by the UE, the eNB first determines whether the UE can access the idle state. The cell may be determined by the eNB performing cell access interaction with the UE, such as performing RRC access interaction, Attach access interaction, and random access interaction. In the process of performing the access interaction between the eNB and the UE, the eNB can determine whether the UE accesses the idle cell, and can obtain the channel state information of the UE during the UE access process, thereby providing information support for generating a new idle cell. .
以下将通过具体实施例,从UE的不同接入阶段说明UE接入多天线系统的方法。Hereinafter, a method for a UE to access a multi-antenna system from different access stages of a UE will be described by way of a specific embodiment.
实施例二Embodiment 2
为了将请求接入的UE接入到空闲小区中,本实施例中eNB在UE的RRC连接过程中确定UE接入的是空闲小区还是非空闲小区,并且eNB在UE的接入过程中获取UE的信道状态信息;当eNB确定UE接入的是非空闲小区时,在UE的RRC连接完成后,根据获取到的UE信道状态信息生成新的空闲小区,并且指示当前接入到非空闲小区的UE通过重选流程连接到新的空闲小区中。In order to access the UE that requests the access to the idle cell, the eNB determines whether the UE accesses the idle cell or the non-idle cell during the RRC connection process of the UE, and the eNB acquires the UE in the UE access process. Channel state information; when the eNB determines that the UE accesses the non-idle cell, after the RRC connection of the UE is completed, generates a new idle cell according to the acquired UE channel state information, and indicates the UE currently accessing the non-idle cell. Connect to the new idle cell through the reselection process.
如图6所示,本实施例的UE接入多天线系统的方法的执行主体可以是LTE eNB,主要处理步骤包括:As shown in FIG. 6, the executor of the method for the UE to access the multi-antenna system in this embodiment may be an LTE eNB, and the main processing steps include:
步骤S21:与UE进行RRC连接建立交互。Step S21: Perform an RRC connection establishment interaction with the UE.
步骤S22:在接收到UE发送的RRC连接建立完成消息之后,确定UE接
入的是空闲小区还是非空闲小区。Step S22: After receiving the RRC connection setup complete message sent by the UE, determining that the UE is connected
Whether it is an idle cell or a non-idle cell.
步骤S23:确定UE接入的是非空闲小区后,生成新的空闲小区。Step S23: After determining that the UE accesses the non-idle cell, generate a new idle cell.
本步骤中需要说明的是,当UE完成与非空闲小区的RRC连接后,eNB判定UE已经接入到非空闲小区中,此时非空闲小区中至少包括了两个UE。It should be noted in this step that after the UE completes the RRC connection with the non-idle cell, the eNB determines that the UE has accessed the non-idle cell, and at this time, the non-idle cell includes at least two UEs.
本实施例中,eNB在UE建立与非空闲小区的RRC连接的过程中获取UE的信道状态信息,并且可以根据UE的信道状态信息生成新的空闲小区,优选的,新的空闲小区所使用天线的波束对准当前UE。In this embodiment, the eNB acquires channel state information of the UE in the process of establishing an RRC connection with the non-idle cell, and may generate a new idle cell according to the channel state information of the UE. Preferably, the antenna used by the new idle cell is used. The beam is aligned with the current UE.
步骤S24:向UE发送非空闲小区的RRC连接释放消息。Step S24: Send an RRC Connection Release message of the non-idle cell to the UE.
eNB确定UE通过RRC连接与非空闲小区建立连接后,eNB向UE发送连接释放消息指示UE断开与当前非空闲小区的RRC连接,如果UE接入的非空闲小区中只有两个UE,则当UE断开与非空闲小区的连接后,非空闲小区成为只接入一个UE的小区。After the eNB determines that the UE establishes a connection with the non-idle cell through the RRC connection, the eNB sends a connection release message to the UE to indicate that the UE disconnects the RRC connection with the current non-idle cell, and if there are only two UEs in the non-idle cell accessed by the UE, After the UE disconnects from the non-idle cell, the non-idle cell becomes a cell that accesses only one UE.
步骤S25:与UE进行小区重选交互,以使UE接入新的空闲小区。Step S25: Perform cell reselection interaction with the UE, so that the UE accesses the new idle cell.
UE释放与非空闲小区的连接后,重新搜索小区,由于新生成的空闲小区是根据UE的信道状态信息生成的专门用于与当前UE配对的新小区,所以在UE搜索到的小区中,根据UE信道状态信息生成的新的空闲小区最符合UE的接入条件,UE通过小区重选接入流程接入到新的空闲小区中。After the UE releases the connection with the non-idle cell, the cell is re-searched. Since the newly generated idle cell is a new cell generated according to the channel state information of the UE and used for pairing with the current UE, in the cell searched by the UE, according to the UE. The new idle cell generated by the UE channel state information is most consistent with the access condition of the UE, and the UE accesses the new idle cell through the cell reselection access procedure.
如图7示出了UE与eNB进行RRC连接交互、生成新的空闲小区以及将UE接入新的空闲小区的信令流程图,包括:FIG. 7 is a signaling flowchart of a UE performing an RRC connection interaction with an eNB, generating a new idle cell, and accessing a UE to a new idle cell, including:
S201:UE向eNB发送RRC连接请求(RRC Connection Request),其中在RRC连接请求中可以携带UE的初始标识及建立原因等信息。S201: The UE sends an RRC connection request to the eNB, where the RRC connection request may carry information such as an initial identifier of the UE and a reason for establishing the UE.
S202:eNB接收到UE发送的RRC连接请求后,向UE发送RRC建立连接消息(RRC Connection Setup),其中在RRC建立连接消息中可以包括建立UE与请求的非空闲小区RRC连接的完整配置信息。S202: After receiving the RRC connection request sent by the UE, the eNB sends an RRC Connection Setup message to the UE, where the RRC connection setup message may include establishing complete configuration information that the UE is connected to the requested non-idle cell RRC.
S203:UE完成与非空闲小区的RRC连接后,向eNB发送RRC连接建立完成消息(RRC Connection Setup Complete)。S203: After completing the RRC connection with the non-idle cell, the UE sends an RRC Connection Setup Complete message (RRC Connection Setup Complete) to the eNB.
S204:eNB接收到RRC连接建立完成消息后,确认UE与非空闲小区RRC连接完成,从而根据在与UE交换过程中得到的UE信道状态信息生成新的空闲小区。S204: After receiving the RRC connection setup complete message, the eNB confirms that the UE completes the RRC connection with the non-idle cell, thereby generating a new idle cell according to the UE channel state information obtained during the exchange with the UE.
S205:eNB生成新的空闲小区后,向UE发送释放与非空闲小区RRC连接
的消息(RRC Connection Release)。S205: After the eNB generates a new idle cell, the eNB sends a release and non-idle cell RRC connection to the UE.
Message (RRC Connection Release).
S206~S208:UE接收到释放RRC连接的消息后,重新搜索小区,由于新生成的小区是根据UE的信道状态信息生成,一般最满足UE的接入条件,所以UE通过小区搜索接入到新生成的小区中,并启动与新的空闲小区的RRC连接,其中UE与新的空闲小区RRC连接过程与上述S201~S203步骤相同,不再赘述。S206-S208: After receiving the message of releasing the RRC connection, the UE searches for the cell again. Since the newly generated cell is generated according to the channel state information of the UE, the UE generally satisfies the access condition of the UE, so the UE accesses the new cell through the cell search. In the generated cell, the RRC connection with the new idle cell is started, and the RRC connection process between the UE and the new idle cell is the same as the steps S201 to S203, and details are not described herein.
实施例三Embodiment 3
为了将请求接入的UE接入到空闲小区中,本实施例中eNB在UE的Attach连接过程中确定UE接入的是空闲小区还是非空闲小区,并且eNB在UE的接入过程中获取UE的信道状态信息;当eNB确定UE接入的是非空闲小区时,在UE的Attach连接完成后,根据获取到的UE信道状态信息生成新的空闲小区,并且指示当前接入到非空闲小区的UE通过切换流程切换到新的空闲小区中。In order to access the UE that requests the access to the idle cell, the eNB determines whether the UE accesses the idle cell or the non-idle cell during the Attach connection process of the UE, and the eNB acquires the UE during the UE access process. Channel state information; when the eNB determines that the UE accesses the non-idle cell, after the Attach connection of the UE is completed, generates a new idle cell according to the acquired UE channel state information, and indicates the UE currently accessing the non-idle cell. Switch to the new idle cell through the handover procedure.
如图8所示,本实施例的UE接入多天线系统的方法的执行主体可以是LTE eNB,主要处理步骤包括:As shown in FIG. 8, the executor of the method for accessing the multi-antenna system of the UE in this embodiment may be an LTE eNB, and the main processing steps include:
步骤S31:与UE进行Attach连接建立交互。Step S31: Perform an Attach connection with the UE to establish an interaction.
步骤S32:在接收到UE发送的Attach完成消息之后,确定UE接入的是空闲小区还是非空闲小区;Step S32: After receiving the Attach Complete message sent by the UE, determining whether the UE accesses the idle cell or the non-idle cell;
本步骤中需要说明的是,当UE完成与非空闲小区的Attach连接后,eNB判定UE已经接入到非空闲小区中,此时非空闲小区中至少包括了两个UE。It should be noted in this step that after the UE completes the Attach connection with the non-idle cell, the eNB determines that the UE has accessed the non-idle cell, and at this time, the non-idle cell includes at least two UEs.
步骤S33:确定UE接入的是非空闲小区后,生成新的空闲小区;Step S33: After determining that the UE accesses the non-idle cell, generate a new idle cell.
本发明实施例中,eNB在UE建立与非空闲小区的Attach连接的过程中获取UE的信道状态信息,并且可以根据UE的信道状态信息生成新的空闲小区,优选的,新的空闲小区所使用天线的波束对准当前UE。In the embodiment of the present invention, the eNB acquires channel state information of the UE in the process of establishing an Attach connection with the non-idle cell, and may generate a new idle cell according to the channel state information of the UE. Preferably, the new idle cell is used. The beam of the antenna is aligned with the current UE.
步骤S34:向UE发送RRC连接重配置消息,RRC连接重配置消息中包含新的空闲小区的标识信息。Step S34: Send an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message includes the identification information of the new idle cell.
考虑到UE已与多天线系统建立Attach连接,得到系统的默认承载,为了使UE从当前接入的非空闲小区切换到新的空闲小区中,eNB向UE发送RRC连接重配置消息,由此以通过RRC重配置将UE切换到新的空闲小区中。Considering that the UE has established an Attach connection with the multi-antenna system to obtain the default bearer of the system, in order to enable the UE to switch from the currently accessed non-idle cell to the new idle cell, the eNB sends an RRC connection reconfiguration message to the UE, thereby The UE is handed over to the new idle cell by RRC reconfiguration.
其中,eNB向UE发送的RRC重配置消息中包含了新的空闲小区的标识信
息,如PCI。The RRC reconfiguration message sent by the eNB to the UE includes the identification information of the new idle cell.
Interest, such as PCI.
UE接收到RRC重配置消息后,根据此消息中的空闲小区的标识信息,与空闲小区重新建立RRC的连接,并向eNB发送RRC连接重配置响应消息。After receiving the RRC reconfiguration message, the UE re-establishes the RRC connection with the idle cell according to the identifier information of the idle cell in the message, and sends an RRC connection reconfiguration response message to the eNB.
步骤S35:接收UE发送的RRC连接重配置响应消息,以将UE接入到新的空闲小区。Step S35: Receive an RRC connection reconfiguration response message sent by the UE to access the UE to the new idle cell.
eNB接收到UE发送的RRC连接重配置响应消息后,确认UE已经与新的空闲小区建立RRC连接,确定UE接入了新的空闲小区。After receiving the RRC connection reconfiguration response message sent by the UE, the eNB confirms that the UE has established an RRC connection with the new idle cell, and determines that the UE accesses the new idle cell.
如图9示出了,UE与eNB进行Attach连接交互、生成新的空闲小区以及将UE接入新的空闲小区的信令流程图,包括:As shown in FIG. 9, a signaling flowchart of a UE performing an Attach connection interaction with an eNB, generating a new idle cell, and accessing the UE to a new idle cell, includes:
S301:UE完成与非空闲小区的RRC连接后,向eNB发送RRC连接完成消息,其中在该消息中携带有Attach连接请求。S301: After completing the RRC connection with the non-idle cell, the UE sends an RRC connection complete message to the eNB, where the message carries an Attach connection request.
S302:eNB向UE发送建立RRC连接的消息。S302: The eNB sends a message to the UE to establish an RRC connection.
S303:UE与非空闲小区建立RRC连接后,向eNB发送RRC连接完成消息。S303: After establishing an RRC connection with the non-idle cell, the UE sends an RRC connection complete message to the eNB.
S304:eNB向UE发送RR连接重新配置消息,其中该消息中携带有Attach默认承载信息。S304: The eNB sends an RR connection reconfiguration message to the UE, where the message carries the Attach default bearer information.
S305:UE向eNB发送RRC连接重新配置消息。S305: The UE sends an RRC connection reconfiguration message to the eNB.
S306:UE向eNB发送Attach连接完成消息。S306: The UE sends an Attach Connection Complete message to the eNB.
S307:eNB接收到Attach连接完成消息后,根据Attach连接过程中获取到的UE信道状态信息生成新的空闲小区.S307: After receiving the Attach connection complete message, the eNB generates a new idle cell according to the UE channel state information acquired during the Attach connection.
S308:eNB向UE发送RRC连接重新配置消息。S308: The eNB sends an RRC connection reconfiguration message to the UE.
S309:UE响应RRC连接重新配置消息,切换到新的空闲小区。S309: The UE switches to the new idle cell in response to the RRC connection reconfiguration message.
实施例四Embodiment 4
实施例二和实施例三的多天线系统接入方法中,eNB为了获取UE信道状态信息,令UE与非空闲小区进行连接交互。eNB在UE与非空闲小区的连接交互过程中获取UE的信道状态信息,然而由于UE与非空闲小区的接入过程需要占用较长的时间,从而使得获取UE信道状态信息所占用时间较长,最终使得UE最终接入到新的空闲小区的时间也会相对比较长。为了缩短UE接入新的空闲小区的时间,本实施例中在UE随机接入阶段确定UE接入的是否为空闲小区,并在UE的随机接入过程中获取UE的信道状态信息,为生成新的空闲小区提供信息支持。
In the multi-antenna system access method of the second embodiment and the third embodiment, the eNB performs connection and interaction between the UE and the non-idle cell in order to acquire the channel state information of the UE. The eNB acquires the channel state information of the UE in the process of the connection between the UE and the non-idle cell. However, since the access process of the UE and the non-idle cell needs to occupy a long time, the time taken to acquire the channel state information of the UE is longer. Eventually, the time for the UE to finally access the new idle cell will be relatively long. In order to shorten the time for the UE to access the new idle cell, the UE determines whether the UE accesses the idle cell in the random access phase of the UE, and acquires the channel state information of the UE in the random access process of the UE. The new free cell provides information support.
如图10所示,本实施的接入多天线系统的方法的执行主体可以是LTE eNB,主要处理步骤包括:As shown in FIG. 10, the executor of the method for accessing the multi-antenna system of the present implementation may be an LTE eNB, and the main processing steps include:
步骤S41:接收UE发送的随机接入请求。Step S41: Receive a random access request sent by the UE.
步骤S42:确定系统中是否存在UE能够接入的空闲小区。Step S42: Determine whether there is an idle cell that the UE can access in the system.
步骤S43:当系统中不存在UE能够随机接入的空闲小区时,生成新的空闲小区。Step S43: When there is no idle cell in the system that the UE can randomly access, a new idle cell is generated.
步骤S44:向UE发送随机接入响应,随机接入响应中包含新的空闲小区的标识信息,以使UE根据标识信息接入新的空闲小区。Step S44: Send a random access response to the UE, where the random access response includes the identifier information of the new idle cell, so that the UE accesses the new idle cell according to the identifier information.
本实施例的多天线接入方法,eNB在UE的随机接入过程中获取UE的用户信道状态信息,避免了UE与非空闲小区RRC连接、Attach连接等过程,由此缩短了获取UE信道状态信息的时间,最终简化了UE接入到新的空闲小区的流程,缩短了UE接入到空闲小区的时间。In the multi-antenna access method of the embodiment, the eNB acquires the user channel state information of the UE in the random access process of the UE, and avoids the process of the RRC connection and the Attach connection between the UE and the non-idle cell, thereby shortening the acquisition of the channel state of the UE. The time of the information finally simplifies the process of the UE accessing the new idle cell, and shortens the time for the UE to access the idle cell.
如图11示出了,UE与进行随机接入交互、生成新的空闲小区以及将UE接入新的空闲小区的信令流程图,包括:As shown in FIG. 11 , a signaling flowchart of a UE performing a random access interaction, generating a new idle cell, and accessing a UE to a new idle cell includes:
S401:UE向eNB发送随机接入前导序列(Random Access Preamble)消息。S401: The UE sends a random access preamble (Random Access Preamble) message to the eNB.
其中,eNB可以选择64个Preamble码中的部分或全部用于竞争接入;且所述的随机接入前导序列消息承载于PRACH(Physical Random Access Channel,物理随机接入信道)中。The eNB may select some or all of the 64 Preamble codes for contention access; and the random access preamble sequence message is carried in a PRACH (Physical Random Access Channel).
S402:eNB接收到随机接入前导序列消息后,根据UE的PRACH获取UE的信道状态信息,并根据获取到的UE的信道状态信息生成新的空闲小区。S402: After receiving the random access preamble sequence message, the eNB acquires channel state information of the UE according to the PRACH of the UE, and generates a new idle cell according to the obtained channel state information of the UE.
S403:eNB向UE发送随机接入响应消息(Random AccessResponse),其中在发送的随机接入响应消息中包含新的空闲小区的标识信息,如新的空闲小区的PCI.S403: The eNB sends a random access response message (Random Access Response) to the UE, where the sent random access response message includes the identifier information of the new idle cell, such as the PCI of the new idle cell.
S404:UE根据接收的随机接入响应消息中的新小区的标识信息重新搜索以接入到新的空闲小区中。S404: The UE re-searches according to the identifier information of the new cell in the received random access response message to access the new idle cell.
当前,UE随机接入过程所用的随机接入信道的带宽为6个RB,无法满足获取全带宽信道状态信息的需求,因此优选的,可以将随机接入信道的带宽从6个RB修改为占满系统带宽的RB数,从而eNB在收到信UE得随机接入信道时能够获取到全带宽的信道状态信息。
Currently, the bandwidth of the random access channel used by the UE in the random access process is 6 RBs, which cannot meet the requirement for obtaining full-bandwidth channel state information. Therefore, the bandwidth of the random access channel can be modified from 6 RBs to account for The number of RBs of the full system bandwidth, so that the eNB can acquire the channel state information of the full bandwidth when receiving the random access channel of the UE.
图12为本发明接入多天线系统的装置实施例一的结构示意图,该装置部署于多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;该装置,包括:确定模块51、新小区生成模块52以及第一接入模块53;其中,确定模块51,用于在终端设备接入小区的过程中,确定终端设备是否能够接入接入系统中已经存在的空闲小区,其中,空闲小区为没有用户接入的小区;新小区生成模块52,用于终端设备不能接入系统中已经存在的空闲小区时,生成新的空闲小区;第一接入模块53,用于向终端设备发送指示消息,以使终端设备根据指示消息接入新的空闲小区。12 is a schematic structural diagram of Embodiment 1 of an apparatus for accessing a multi-antenna system according to the present invention. The apparatus is deployed in a multi-antenna system, and performs cell-level pilot and control channel weighting by using inter-cell joint precoding; the apparatus includes: determining The module 51, the new cell generation module 52, and the first access module 53. The determining module 51 is configured to determine, in the process of the terminal device accessing the cell, whether the terminal device can access the existing idle cell in the access system. The idle cell is a cell with no user access; the new cell generating module 52 is configured to generate a new idle cell when the terminal device cannot access the idle cell already existing in the system; the first access module 53 is configured to: Sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
在上述实施例中,接入多天线系统的装置还包括:第二接入模块,用于将终端设备直接或通过非空闲小区接入到系统已经存在的空闲小区中,其中,系统中已经存在的空闲小区为根据系统中各非空闲小区已接入的终端设备的信道状态信息生成,非空闲小区为已有至少一个用户接入的小区。In the foregoing embodiment, the device for accessing the multi-antenna system further includes: a second access module, configured to access the terminal device to the idle cell where the system already exists, directly or through the non-idle cell, where the system already exists The idle cell is generated according to channel state information of the terminal device that is accessed by each non-idle cell in the system, and the non-idle cell is a cell that has at least one user access.
图13为本发明接入多天线系统的装置实施例二的结构示意图,该装置部署于多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;该装置,包括:确定模块51、新小区生成模块52以及第一接入模块53,各模块功能与上述装置实施例一相同,不再赘述。13 is a schematic structural diagram of Embodiment 2 of an apparatus for accessing a multi-antenna system according to the present invention. The apparatus is deployed in a multi-antenna system, and uses cell-to-cell joint pre-coding to weight cell-level pilot and control channels. The apparatus includes: determining The functions of the module 51, the new cell generation module 52, and the first access module 53 are the same as those of the foregoing device embodiment 1, and are not described again.
在上述实施例中,新小区生成模块52包括:信息获取单元521、编码确定单元522以及小区生成单元523;信息获取单元521,用于获取终端设备的信道状态信息;编码确定单元522,用于根据信道状态信息确定小区间联合预编码;小区生成单元523,用于根据小区间联合预编码确定小区属性信息。In the above embodiment, the new cell generating module 52 includes: an information acquiring unit 521, an encoding determining unit 522, and a cell generating unit 523. The information acquiring unit 521 is configured to acquire channel state information of the terminal device, and the encoding determining unit 522 is configured to: The inter-cell joint precoding is determined according to the channel state information, and the cell generating unit 523 is configured to determine the cell attribute information according to the inter-cell joint precoding.
在上述实施例中,确定模块51,包括:交互单元511,用于与终端设备进行小区接入交互;第一属性确定单元512,用于确定终端设备接入的是空闲小区还是非空闲小区。In the foregoing embodiment, the determining module 51 includes: an interaction unit 511, configured to perform cell access interaction with the terminal device, and a first attribute determining unit 512, configured to determine whether the terminal device accesses the idle cell or the non-idle cell.
在上述实施例中,交互单元511,具体用于与终端设备进行无线资源控制RRC连接建立交互;第一属性确定单元512,具体用于在接收到终端设备发送的RRC连接建立完成消息之后,确定终端设备接入的是空闲小区还是非空闲小区。In the foregoing embodiment, the interaction unit 511 is specifically configured to perform a radio resource control RRC connection establishment interaction with the terminal device. The first attribute determining unit 512 is specifically configured to: after receiving the RRC connection setup complete message sent by the terminal device, determine Whether the terminal device accesses an idle cell or a non-idle cell.
在上述实施例中,第一接入模块53具体用于向终端设备发送非空闲小区的RRC连接释放消息;以及用于与终端设备进行小区重选交互,以使终端设备接入新的空闲小区。
In the foregoing embodiment, the first access module 53 is specifically configured to send an RRC connection release message of the non-idle cell to the terminal device, and perform cell reselection interaction with the terminal device, so that the terminal device accesses the new idle cell. .
在上述实施例中,交互单元511,具体用于与终端设备进行Attach连接建立交互;第一属性确定单元512,具体用于在接收到终端设备发送的Attach完成消息之后,确定终端设备接入的是空闲小区还是非空闲小区。In the foregoing embodiment, the interaction unit 511 is specifically configured to perform an Attach connection establishment interaction with the terminal device. The first attribute determining unit 512 is specifically configured to determine, after receiving the Attach completion message sent by the terminal device, the terminal device accessing. Whether it is an idle cell or a non-idle cell.
在上述实施例中,第一接入模块53,具体用于向终端设备发送RRC连接重配置消息,RRC连接重配置消息中包含新的空闲小区的小区标识信息;以及用于接收终端设备发送的RRC连接重配置响应消息,以使终端设备根据小区标识信息接入到新的空闲小区。In the foregoing embodiment, the first access module 53 is specifically configured to send an RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the cell identifier information of the new idle cell, and is used to receive the sending by the terminal device. The RRC connects the reconfiguration response message to enable the terminal device to access the new idle cell according to the cell identity information.
在上述实施例中,确定模块51,具体用于接收终端设备发送的随机接入请求;以及用于确定终端设备是否能够接入空闲小区。In the foregoing embodiment, the determining module 51 is specifically configured to receive a random access request sent by the terminal device, and to determine whether the terminal device can access the idle cell.
在上述实施例中,第一接入模块53,具体用于向终端设备发送随机接入响应,随机接入响应中包含新的空闲小区的小区标识信息,以使终端设备根据小区标识信息接入新的空闲小区。In the above embodiment, the first access module 53 is specifically configured to send a random access response to the terminal device, where the random access response includes the cell identity information of the new idle cell, so that the terminal device accesses according to the cell identity information. New free cell.
如图14位本发明接入设备实施例一的结构示意图,该设备应用于多天线系统中,包括:接入设备1400包括通信接口1401、存储器1403和处理器1402,其中,通信接口1401、处理器1402、存储器1403、通过总线1404相互连接;总线1404可以是外设部件互连标准(peripheral component interconnect,简称PCI)总线或扩展工业标准结构(extended industry standard architecture,简称EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示,图14中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。FIG. 14 is a schematic structural diagram of Embodiment 1 of an access device according to the present invention. The device is applied to a multi-antenna system, including: the access device 1400 includes a communication interface 1401, a memory 1403, and a processor 1402, wherein the communication interface 1401 processes The device 1402 and the memory 1403 are connected to each other through a bus 1404. The bus 1404 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.
通信接口1401用于与发送端通信。存储器1403,用于存放程序。具体地,程序可以包括程序代码,程序代码包括计算机操作指令。存储器1403可能包含随机存取存储器(random access memory,简称RAM),也可能还包括非易失性存储器(non-volatile memory),例如至少一个磁盘存储器。The communication interface 1401 is for communicating with the transmitting end. The memory 1403 is configured to store a program. In particular, the program can include program code, the program code including computer operating instructions. The memory 1403 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
处理器1402执行存储器1403所存放的程序,实现本发明前述方法实施例的方法:The processor 1402 executes the program stored in the memory 1403 to implement the method of the foregoing method embodiment of the present invention:
在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;
若所述终端设备不能接入系统中已经存在的空闲小区,则生成新的空闲小区;
Generating a new idle cell if the terminal device cannot access an idle cell already existing in the system;
向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。And sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
上述的处理器1402可以是通用处理器,包括中央处理器(Central Processing Unit,简称CPU)、网络处理器(Network Processor,简称NP)等;还可以是数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。The processor 1402 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP Processor, etc.), or a digital signal processor (DSP), an application specific integrated circuit. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
在上述实施例中,所述设备为LTE系统中的增强基站eNB、无线保真系统中的WiFi无线访问接入点AP或全球微波互联接入WiMAX中的基站BS。In the above embodiment, the device is an enhanced base station eNB in the LTE system, a WiFi wireless access point AP in the wireless fidelity system, or a base station BS in the global microwave interconnection access WiMAX.
本发明实施例的接入多天线系统的装置及接入设备所实现的功能与上述方法相同,不再一一赘述。The functions of the device for accessing the multi-antenna system and the access device of the embodiment of the present invention are the same as those of the foregoing method, and are not repeatedly described.
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.
Claims (22)
- 一种接入多天线系统的方法,其特征在于,所述多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;A method for accessing a multi-antenna system, wherein in the multi-antenna system, cell-level pilot and control channel are weighted by using inter-cell joint precoding;所述方法,包括:The method includes:在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;若所述终端设备不能接入系统中已经存在的空闲小区,则生成新的空闲小区;Generating a new idle cell if the terminal device cannot access an idle cell already existing in the system;向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。And sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:将终端设备直接或通过非空闲小区接入到系统已经存在的空闲小区中,其中,系统中已经存在的所述空闲小区为根据系统中各非空闲小区已接入的终端设备的信道状态信息生成的小区,所述非空闲小区为已有至少一个用户接入的小区。The method according to claim 1, wherein the method further comprises: accessing the terminal device directly or through a non-idle cell to an idle cell in which the system already exists, wherein the idle cell already existing in the system A cell that is generated according to channel state information of a terminal device that is accessed by each non-idle cell in the system, where the non-idle cell is a cell that has at least one user access.
- 根据权利要求1所述的方法,其特征在于,所述生成新的空闲小区,包括:The method according to claim 1, wherein the generating a new idle cell comprises:获取所述终端设备的信道状态信息;Obtaining channel state information of the terminal device;根据所述信道状态信息确定小区间联合预编码;Determining inter-cell joint precoding according to the channel state information;根据所述小区间联合预编码确定小区属性信息。Cell attribute information is determined according to the inter-cell joint precoding.
- 根据权利要求1所述的方法,其特征在于,所述在终端设备接入小区的过程中,确定所述终端设备是否能接入系统中已经存在的空闲小区,包括:The method according to claim 1, wherein in the process of the terminal device accessing the cell, determining whether the terminal device can access the existing idle cell in the system includes:与终端设备进行小区接入交互;Performing cell access interaction with the terminal device;确定所述终端设备接入的是空闲小区还是非空闲小区。Determining whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求4所述的方法,其特征在于,所述与终端设备进行小区接入交互,包括:The method according to claim 4, wherein the performing cell access interaction with the terminal device comprises:与所述终端设备进行无线资源控制RRC连接建立交互;Establishing an interaction with the terminal device for performing radio resource control RRC connection;相应的,所述确定所述终端设备接入的是空闲小区还是非空闲小区,包括:Correspondingly, the determining whether the terminal device accesses an idle cell or a non-idle cell includes:在接收到所述终端设备发送的RRC连接建立完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。 After receiving the RRC connection setup complete message sent by the terminal device, determining whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求5所述的方法,其特征在于,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:The method according to claim 5, wherein the sending the indication message to the terminal device to enable the terminal device to access the new idle cell according to the indication message comprises:向所述终端设备发送所述非空闲小区的RRC连接释放消息;Sending, to the terminal device, an RRC connection release message of the non-idle cell;与所述终端设备进行小区重选交互,以使所述终端设备接入所述新的空闲小区。Performing cell reselection interaction with the terminal device to enable the terminal device to access the new idle cell.
- 根据权利要求4所述的方法,其特征在于,所述与终端设备进行小区接入交互,包括:The method according to claim 4, wherein the performing cell access interaction with the terminal device comprises:与所述终端设备进行Attach连接建立交互;Establishing an interaction with the terminal device to establish an interaction;相应的,所述确定所述终端设备接入的是空闲小区还是非空闲小区,包括:Correspondingly, the determining whether the terminal device accesses an idle cell or a non-idle cell includes:在接收到所述终端设备发送的Attach完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。After receiving the Attach Complete message sent by the terminal device, determining whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求7所述的方法,其特征在于,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:The method according to claim 7, wherein the sending the indication message to the terminal device to enable the terminal device to access the new idle cell according to the indication message comprises:向所述终端设备发送RRC连接重配置消息,所述RRC连接重配置消息中包含所述新的空闲小区的小区标识信息;Sending, to the terminal device, an RRC connection reconfiguration message, where the RRC connection reconfiguration message includes cell identification information of the new idle cell;接收所述终端设备发送的RRC连接重配置响应消息,以使所述终端设备根据所述小区标识信息接入到所述新的空闲小区。And receiving an RRC connection reconfiguration response message sent by the terminal device, so that the terminal device accesses the new idle cell according to the cell identity information.
- 根据权利要求1所述的方法,其特征在于,所述在终端设备接入小区的过程中,确定所述终端设备是否能够接入系统中已经存在的空闲小区,包括:The method according to claim 1, wherein in the process of the terminal device accessing the cell, determining whether the terminal device can access an existing idle cell in the system includes:接收所述终端设备发送的随机接入请求;Receiving a random access request sent by the terminal device;确定所述终端设备是否能够接入系统中已经存在的空闲小区。Determining whether the terminal device can access an idle cell that already exists in the system.
- 根据权利要求9所述的方法,其特征在于,所述向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区,包括:The method according to claim 9, wherein the sending the indication message to the terminal device to enable the terminal device to access the new idle cell according to the indication message comprises:向所述终端设备发送随机接入响应,所述随机接入响应中包含所述新的空闲小区的小区标识信息,以使所述终端设备根据所述小区标识信息接入所 述新的空闲小区。Sending a random access response to the terminal device, where the random access response includes cell identification information of the new idle cell, so that the terminal device accesses the device according to the cell identity information. Said a new idle cell.
- 一种接入多天线系统的装置,其特征在于,该装置部署于多天线系统中,采用小区间联合预编码对小区级导频及控制信道加权;An apparatus for accessing a multi-antenna system, wherein the apparatus is deployed in a multi-antenna system, and the cell-level pilot and control channel are weighted by using inter-cell joint precoding;所述装置,包括:The device includes:确定模块,用于在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;a determining module, configured to determine, in a process in which the terminal device accesses the cell, whether the terminal device can access an existing idle cell in the access system, where the idle cell is a cell that has no user access;新小区生成模块,用于所述终端设备不能接入系统中已经存在的空闲小区时,生成新的空闲小区;a new cell generation module, configured to generate a new idle cell when the terminal device cannot access an existing idle cell in the system;第一接入模块,用于向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。The first access module is configured to send an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
- 根据权利要求11所述的装置,其特征在于,该装置还包括:第二接入模块,用于将终端设备直接或通过非空闲小区接入到系统已经存在的空闲小区中,其中,系统中已经存在的所述空闲小区为根据系统中各非空闲小区已接入的终端设备的信道状态信息生成,所述非空闲小区为已有至少一个用户接入的小区。The device according to claim 11, wherein the device further comprises: a second access module, configured to access the terminal device directly or through a non-idle cell to an idle cell in which the system already exists, wherein, in the system The idle cell that is already in existence is generated according to channel state information of a terminal device that has been accessed by each non-idle cell in the system, and the non-idle cell is a cell that has been accessed by at least one user.
- 根据权利要求11所述的装置,其特征在于,所述新小区生成模块包括:The device according to claim 11, wherein the new cell generation module comprises:信息获取单元,用于获取所述终端设备的信道状态信息;An information acquiring unit, configured to acquire channel state information of the terminal device;编码确定单元,用于根据所述信道状态信息确定小区间联合预编码;An encoding determining unit, configured to determine inter-cell joint precoding according to the channel state information;小区生成单元,用于根据所述小区间联合预编码确定小区属性信息。a cell generating unit, configured to determine cell attribute information according to the inter-cell joint precoding.
- 根据权利要求11所述的装置,其特征在于,所述确定模块,包括:The apparatus according to claim 11, wherein the determining module comprises:交互单元,用于与终端设备进行小区接入交互;An interaction unit, configured to perform cell access interaction with the terminal device;第一属性确定单元,用于确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is configured to determine whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求14所述的装置,其特征在于,所述交互单元,具体用于与所述终端设备进行无线资源控制RRC连接建立交互;The apparatus according to claim 14, wherein the interaction unit is specifically configured to perform a radio resource control RRC connection establishment interaction with the terminal device;所述第一属性确定单元,具体用于在接收到所述终端设备发送的RRC连接建立完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is specifically configured to determine, after receiving the RRC connection setup complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求15所述的装置,其特征在于,所述第一接入模块,具 体用于向所述终端设备发送所述非空闲小区的RRC连接释放消息;以及用于与所述终端设备进行小区重选交互,以使所述终端设备接入所述新的空闲小区。The apparatus according to claim 15, wherein said first access module has And configured to send an RRC connection release message of the non-idle cell to the terminal device; and configured to perform cell reselection interaction with the terminal device, so that the terminal device accesses the new idle cell.
- 根据权利要求14所述的装置,其特征在于,所述交互单元,具体用于与所述终端设备进行Attach连接建立交互;The device according to claim 14, wherein the interaction unit is specifically configured to perform an Attach connection establishment interaction with the terminal device;所述第一属性确定单元,具体用于在接收到所述终端设备发送的Attach完成消息之后,确定所述终端设备接入的是空闲小区还是非空闲小区。The first attribute determining unit is configured to determine, after receiving the Attach Complete message sent by the terminal device, whether the terminal device accesses an idle cell or a non-idle cell.
- 根据权利要求17所述的装置,其特征在于,所述第一接入模块,具体用于向所述终端设备发送RRC连接重配置消息,所述RRC连接重配置消息中包含所述新的空闲小区的小区标识信息;以及用于接收所述终端设备发送的RRC连接重配置响应消息,以使所述终端设备根据所述小区标识信息接入到所述新的空闲小区。The device according to claim 17, wherein the first access module is configured to send an RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the new idle And the RRC connection reconfiguration response message sent by the terminal device, so that the terminal device accesses the new idle cell according to the cell identity information.
- 根据权利要求11所述的装置,其特征在于,所述确定模块,具体用于接收所述终端设备发送的随机接入请求;以及用于确定所述终端设备是否能够接入空闲小区。The apparatus according to claim 11, wherein the determining module is specifically configured to receive a random access request sent by the terminal device; and to determine whether the terminal device can access an idle cell.
- 根据权利要求19所述的装置,其特征在于,所述第一接入模块,具体用于向所述终端设备发送随机接入响应,所述随机接入响应中包含所述新的空闲小区的小区标识信息,以使所述终端设备根据所述小区标识信息接入所述新的空闲小区。The device according to claim 19, wherein the first access module is specifically configured to send a random access response to the terminal device, where the random access response includes the new idle cell The cell identifier information is used to enable the terminal device to access the new idle cell according to the cell identity information.
- 一种接入设备,其特征在于,该设备应用于多天线系统中,包括:An access device, characterized in that the device is applied to a multi-antenna system, comprising:通信接口、存储器和处理器和通信总线,其中,所述通信接口、所述存储器和所述处理器通过所述通信总线通信;a communication interface, a memory and a processor, and a communication bus, wherein the communication interface, the memory, and the processor communicate via the communication bus;所述存储器用于存放程序,所述处理器用于执行所述存储器存储的程序;当所述空分复用处理装置运行时,所述处理器运行程序,所述程序包括:The memory is used to store a program, the processor is configured to execute the program stored by the memory; when the space division multiplexing processing device is in operation, the processor runs a program, and the program includes:在终端设备接入小区的过程中,确定所述终端设备是否能够接入接入系统中已经存在的空闲小区,其中,所述空闲小区为没有用户接入的小区;In the process of the terminal device accessing the cell, determining whether the terminal device can access the idle cell that is already in the access system, where the idle cell is a cell that has no user access;若所述终端设备不能接入系统中已经存在的空闲小区,则生成新的空闲小区;Generating a new idle cell if the terminal device cannot access an idle cell already existing in the system;向所述终端设备发送指示消息,以使所述终端设备根据所述指示消息接入所述新的空闲小区。 And sending an indication message to the terminal device, so that the terminal device accesses the new idle cell according to the indication message.
- 根据权利要求21所述的接入设备,其特征在于,所述设备为LTE系统中的增强基站eNB、无线保真系统中的WiFi无线访问接入点AP或全球微波互联接入WiMAX中的基站BS。 The access device according to claim 21, wherein the device is an enhanced base station eNB in an LTE system, a WiFi wireless access point AP in a wireless fidelity system, or a base station in a global microwave interconnection access WiMAX. BS.
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