CN101932075A

CN101932075A - Information transmission method, information acquisition method and device

Info

Publication number: CN101932075A
Application number: CN2009101509450A
Authority: CN
Inventors: 邱勇; 谢铂云; 邢平平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-06-24
Filing date: 2009-06-24
Publication date: 2010-12-29

Abstract

The embodiment of the invention provides an information transmission method, an information acquisition method and a device. The information transmission method comprises the following steps: determining a mapping relationship, wherein the mapping relationship comprises the mapping between high-level information and positions of physical resources; and determining the position of a physical resource corresponding to the high-level information to be transmitted according to the mapping relationship, and transmitting a code sequence in the position of the physical resource. By carrying code sequences in the positions of different physical resources, the method allows the specific high-level information to be expressed by the mapping relationship between the positions of the physical resources and the high-level information, and can realize the direct transmission and expression of the high-level information based on code sequences carried in the positions of the different physical resources without sending a system message to UE. The method and the device provide a wider variety of information expression modes for the high-level information and facilitate the UE to acquire the high-level information.

Description

Information transmission method, information acquisition method and device

Technical Field

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

Background

The cell high-level information refers to information that needs high-level processing or use of a protocol stack, and includes but is not limited to: cell identification, cell access authority information, various logic parameters of the cell and the like. The physical layer information refers to information that needs physical layer processing or use, and the physical layer information is mainly used for physical layer specific functions such as physical layer signal processing, modulation and demodulation, encoding and decoding, and the like.

In the LTE system, a Physical Cell Identity (PCI) of a Cell belongs to Cell high-level information. The PCI of the LTE system is configured by the network, and a cell usually has only one PCI. The PCI is represented by a Zadoff-Chu sequence (ZC sequence) which has a total of 504. ZC sequences are carried on certain physical resources according to certain rules, such as Synchronization Channels (SCHs) in an LTE system. ZC sequences have two functions: 1) the ZC sequence is the PCI of a cell and belongs to high-level information of the cell, and a terminal (UE) can identify the cell through the PCI; 2) the UE performs correlation operation on the received signal by using the ZC sequence, so that time and frequency synchronization with a cell can be obtained.

In the prior art, a PCI is carried on a physical layer synchronization channel to be issued to a UE, and the UE acquires the PCI of a cell in the following manner: the UE pre-stores a set of code sequences, such as ZC sequences, which have good orthogonality properties. The UE correlates the set of orthogonal code sequences with the received code sequence one by one, and if correlated, means that the orthogonal code with the correlation property is the PCI of the cell. However, thousands of private network cells may be deployed in the coverage area of the macro cell, and due to the limited number of PCIs, the private network cells in the coverage area of the macro cell may have the same PCI, so that when the UE moves from the macro cell to a private network cell allowing access, the macro cell cannot uniquely identify the target cell through the PCI.

In the prior art, when measuring a network, the UE reads system information of a private network cell to obtain a CSG ID, an ECGI, and the like, or the network side stores a PCI, a CSG ID, and an ECGI corresponding relationship of neighboring private network cells, and indexes the CSG ID and the ECGI when the UE reports the PCI. However, employing the UE-based approach requires configuring long measurement gaps, which may cause radio link failure. The network-based method needs the macro cell to maintain the corresponding relation among the PCI, CSG ID and ECGI of the private network cell in real time, and the complexity of the network side is increased.

Disclosure of Invention

The embodiment of the invention provides an information transmission method, an information acquisition method and an information acquisition device.

In one aspect, an embodiment of the present invention provides an information delivery method, where the method includes: determining a mapping relation, wherein the mapping relation comprises mapping of high-level information and a physical resource position; and determining a physical resource position corresponding to the high-level information needing to be transmitted according to the mapping relation, and transmitting the code sequence on the physical resource position.

In another aspect, an embodiment of the present invention provides a base station, where the base station includes: the mapping relation determining unit is used for determining a mapping relation, and the mapping relation comprises mapping between high-level information and a physical resource position;

and a sequence code transmitting unit configured to determine a physical resource location corresponding to the higher layer information to be transmitted, based on the mapping relationship determined by the mapping relationship determining unit, and transmit a code sequence at the physical resource location.

In another aspect, an embodiment of the present invention provides an information obtaining method, where the method includes: receiving a code sequence sent by a cell, determining a physical resource position corresponding to high-level information needing to be transmitted by the cell according to a mapping relation, and sending the code sequence on the physical resource position; the mapping relation comprises mapping of the high-level information and the physical resource position; and acquiring the mapping relation, and determining the high-level information according to the code sequence and the mapping relation.

In another aspect, an embodiment of the present invention provides a terminal device, where the terminal device includes: a mapping relation obtaining unit, configured to obtain a mapping relation, where the mapping relation includes mapping between the high-level information and the physical resource location;

a high-level information acquisition unit, configured to receive a code sequence sent by a cell, where the code sequence is sent by the cell, and determines, according to a mapping relationship, a physical resource location corresponding to high-level information to be transmitted, and sends the code sequence on the physical resource location; and determining the high-layer information according to the code sequence and the mapping relation.

The information transmission method, the information acquisition method and the information acquisition device of the embodiment of the invention bear the code sequences on different physical resource positions, express the specific high-level information through the mapping relation between the physical resource positions and the high-level information, ensure that the high-level information can be directly transmitted and expressed through the code sequences borne by the different physical resource positions without being issued to the UE through system information, provide richer information expression modes for the high-level information and provide convenience for the UE to acquire the high-level information.

Drawings

Fig. 1 is a schematic diagram illustrating the use of physical resources by LTE according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating an overall method of information delivery according to an embodiment of the present invention;

FIG. 3 is a functional block diagram of an information private network base station according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating an overall method of information acquisition according to an embodiment of the present invention;

FIG. 5 is a functional block diagram of a terminal device according to an embodiment of the present invention;

FIG. 6 is a flowchart of a method for information delivery according to embodiment 1 of the present invention;

FIG. 7 is a diagram illustrating allocation of physical resource locations according to an embodiment of the present invention;

FIG. 8 is a flowchart of a method for information delivery according to embodiment 2 of the present invention;

fig. 9 is a flowchart illustrating a terminal performing handover according to high-level information according to an embodiment of the present invention;

fig. 10 is a second flowchart of the terminal performing handover according to higher layer information according to the embodiment of the present invention.

Detailed Description

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

The embodiment of the invention provides an information transmission method, an information acquisition method and an information acquisition device. The information transmission method and the device bear the code sequences on different physical resource positions, and the specific high-level information is expressed by the mapping relation of the high-level information of the physical resource positions, so that the high-level information can be directly transmitted and expressed by the different physical resource positions and the code sequences borne by the different physical resource positions without being transmitted to the UE through system information, and richer information expression modes are provided for the high-level information. According to the information acquisition method and the information acquisition device, the high-level information transmitted by the cell is acquired according to the code sequence received at the corresponding physical resource position and the mapping relation between the high-level information and the physical resource position, the high-level information does not need to be received through system information, and convenience is provided for UE to acquire the high-level information of the cell.

The physical resource location has different representation methods in different systems, taking OFDM system as an example, the physical resource of the OFDM air interface is represented by two latitudes of time and frequency, and is usually called as resource grid. For example, the physical resources of the LTE system may be represented by Resource Blocks (RBs), each of which consists of 12 subcarriers (15kHz) and 1 slot (0.5 ms). Usually, a slot consists of 6 or 7 symbols (symbols), and one subcarrier and one symbol constitute one Resource Element (RE). Each RB consists of 84 Resource Elements (REs), occupying a total of 180kHz bandwidth and 0.5ms time. According to the configuration or scheduling mode, some of the resources on these physical resources carry information such as synchronization signals, reference signals, and Physical Broadcast Channel (PBCH). The free physical resources may be resource scheduled by the resource scheduler for carrying user data. Fig. 1 is a schematic diagram of LTE on physical resource usage.

In the embodiment of the present invention, the UE and the network side may pre-store the mapping relationship between the higher layer information and the physical resource location and the code sequence as shown in table 1, or store the mapping relationship between the higher layer information and the physical resource location. The mapping relation can be preset by a protocol, and the UE and the network side store the same mapping relation table according to the protocol; or the network side can obtain the mapping relation table from the network management equipment and then send the mapping relation table to the UE.

TABLE 1

High level information	Physical resource location	Code sequence
			Physical cell ID1	Position	1	ZC sequence 1
Physical cell ID2	Position	1					ZC sequence 2
			CSG ID1	Position 2	ZC sequence 1
CSG ID2	Position 3	ZC sequence 3
			CSG ID3	Position 4	ZC sequence 4
CSG ID4	Position 5	ZC sequence 5

Table 1 is a schematic diagram of a mapping relationship between high-level information and physical resource locations and code sequences according to an embodiment of the present invention, and the contents of the table are only used for explaining the embodiment of the present invention and do not limit the present invention.

As shown in Table 1, the physical resource locations may include: one or more of a coordinate position on a time axis, a coordinate position on a frequency axis, or a coordinate position on a time axis and a frequency axis. The above-mentioned physical resource location includes a case of continuous centralized allocation or discrete. The code sequence may be a sequence of numbers or a sequence of symbols, such as various orthogonal code sequences. The higher layer information may be any one or combination of the following: extended PCI, ECGI, CSG ID (which may indicate whether the cell allows UE access), and access right information of the cell. When the higher layer information is extended PCI, the code sequence carried in the synchronization channel in the prior art can be used as a part of PCI, and the code sequence is carried in other specific physical resource locations, and the PCI is expressed by the sequence codes carried in the synchronization channel and other specific physical locations.

Fig. 2 is an overall flowchart of an information delivery method according to an embodiment of the present invention. As shown in fig. 2:

step S201, determining a mapping relation, wherein the mapping relation comprises mapping of high-level information and a physical resource position;

step S202, according to the mapping relation, determining a physical resource position corresponding to the high-level information needing to be transmitted, and transmitting a code sequence on the physical resource position.

Optionally, when the UE does not pre-store the mapping relationship on the network side, the method further includes: and sending the mapping relation to a terminal, so that the terminal receives a code sequence at a corresponding physical resource position according to the mapping relation, and acquires high-level information transmitted by the cell according to the received code sequence and the code sequence corresponding to the physical resource position.

Optionally, when the cell is a private network cell, the mapping relationship is represented by an index; sending the mapping relationship to a terminal includes: broadcasting and sending the mapping relation index to a terminal in system information; or the mapping relation index is issued to the terminal through an application layer protocol.

Fig. 3 is a functional block diagram of a base station according to an embodiment of the present invention, and as shown in fig. 3, a base station 30 according to the embodiment includes: a mapping relationship determining unit 301, configured to determine a mapping relationship, where the mapping relationship includes mapping between high-level information and a physical resource location; a sequence code transmitter 302, which determines a physical resource location corresponding to the higher layer information to be transmitted, based on the mapping relationship determined by the mapping relationship determination unit, and transmits a code sequence at the physical resource location.

Optionally, the mapping relationship determined by the mapping relationship determining unit 301 further includes mapping between the cell high layer information, the physical resource location and the code sequence.

Optionally, the base station 30 of this embodiment may further include: a mapping relation sending unit 303, configured to send the mapping relation determined by the mapping relation determining unit to the terminal.

Optionally, when the cell is a private network cell, the mapping relationship is represented by an index; the mapping relationship sending unit 303 is configured to send the mapping relationship index to a terminal in a broadcast manner in system information; or the mapping relation index is issued to the terminal through an application layer protocol.

Fig. 4 is an overall flowchart of an information obtaining method according to an embodiment of the present invention, and as shown in fig. 4, the method includes:

step S401, receiving a code sequence sent by a cell, wherein the code sequence is sent by the cell, determines a physical resource position corresponding to high-level information needing to be transmitted according to a mapping relation, and sends the physical resource position; the mapping relation comprises mapping of the high-level information and the physical resource position;

step S402, obtaining the mapping relation, and determining the high-level information according to the code sequence and the mapping relation.

Optionally, the step comprises: performing correlation operation on the received code sequence and a code sequence corresponding to a physical resource position contained in the mapping relation; and if the mapping relation is relevant, determining the high-level information contained in the mapping relation as the high-level information transferred by the cell.

Optionally, in the mapping relationship, the code sequences carried on different physical resource locations are the same; alternatively, the code sequences carried on different physical resource locations are different.

Optionally, when the cell is a private network cell, the mapping relationship is represented by an index; determining the mapping relationship comprises: receiving an index of the mapping relationship from broadcast information of system information; or receiving the index of the mapping relation sent by the application layer protocol.

Optionally, when the cell is a private network cell, the method further includes: and switching between the private network cells according to the high-level information of the private network cells.

Fig. 5 is a functional block diagram of a terminal device according to an embodiment of the present invention, where the terminal device 50 includes: a mapping relationship obtaining unit 501, configured to obtain a mapping relationship, where the mapping relationship includes mapping between the high-level information and the physical resource location; (ii) a A high-level information obtaining unit 502, configured to receive a code sequence sent by a cell, where the code sequence is sent by the cell, and determines, according to a mapping relationship, a physical resource location corresponding to high-level information that needs to be transmitted, and sends the code sequence on the physical resource location; and determining the high-layer information according to the code sequence and the mapping relation.

Optionally, the mapping relationship obtained by the mapping relationship obtaining unit 501 further includes mapping between the cell high-layer information, the physical resource location, and the code sequence.

Optionally, the high-level information obtaining unit 502 is further configured to perform correlation operation on the received code sequence and a code sequence corresponding to a physical resource location included in the mapping relationship; and if the mapping relation is relevant, determining the high-level information contained in the mapping relation as the high-level information transferred by the cell.

Optionally, when the cell is a private network cell, the mapping relationship is represented by an index; the mapping relation determining unit 501 is configured to receive the physical resource location index from broadcast information of system information; or receiving the physical resource position index sent by the application layer protocol.

Optionally, when the cell is a private network cell, the terminal device 50 may further include: a switching unit 503, configured to perform switching between private network cells according to the higher layer information of the private network cell.

Example 1:

in this embodiment, different cells use the same code sequence, and the physical resource locations for carrying the code sequence are different, the code sequence of this embodiment may be predefined on the network side and the UE side, and may be determined through negotiation between the network side and the UE, or may be issued to the UE by the network side, as long as orthogonality is satisfied. Therefore, in this embodiment, the higher layer information can be expressed using the position of the physical resource, and since the UE holds the same code sequence in advance, the cell holds the mapping relationship between the higher layer information and the position of the physical resource, and acquires the higher layer information of the cell based on the mapping relationship in this embodiment.

Fig. 6 is a flowchart of a method for information transmission according to the present embodiment. As shown in fig. 6:

step S601: the UE and the private network cell adopt the same code sequence;

step S602: and the private network cell determines the mapping relation between the high-level information and the physical resource position.

Optionally, in this embodiment, an index is used to represent each group of mapping relationships.

Firstly, the private network cell determines the number of physical resource positions for carrying code sequences in each group of mapping relations, namely the required number of REs, according to the high-level information required to be expressed. If the PCI is the PCI carrying expansion, the number of the corresponding physical resource positions in the mapping relation is determined according to the number of the expanded PCI (for example, if 2048 PCI are expanded, the length of 11 bits is carried, and a signal emitting 11 bits is corresponding to a physical signal); and if the mapping CSG ID/ECGI is used, determining the required mapping relation or the number of indexes of the mapping relation directly according to the number of the CSG ID/ECGI.

Assuming that the bearer code sequence requires 6 REs, the RE positions of the bearer code sequence are selected, and REs except for REs occupied by the reference signal and the synchronization signal in fig. 1 are taken as candidate resources of the bearer code sequence. Each 6 REs are divided into a Group (RE Group), and an index number is assigned to each Group of REs and the higher layer information corresponding to the Group of REs.

Then, the private network is started and requests a network management node, and the network management node uniformly allocates physical resource positions corresponding to different high-level information, such as RE positions, for the private network cell. As optimization, the private network measures the adjacent macro cells, and the physical resource position allocated by the network management node is unique in the macro cell; or the physical resource positions of private network cells with the same PCI under the macro cell are different; or randomly select a physical resource location when the private network is started.

FIG. 7 is a diagram illustrating a physical resource location allocation according to an embodiment of the present invention, wherein a location group formed by a plurality of physical resource locations can also be represented by an index. Assuming that the private network cell selects an RE group with index number 3, the higher layer information is expressed by carrying a pre-agreed code sequence in the RE group.

Step S603: and the private network cell determines the physical resource position information corresponding to the high-level information to be transmitted according to the mapping relation, and transmits a code sequence on the corresponding physical resource position, wherein the combination of the physical resource position and the same code sequence corresponds to the high-level information to be transmitted.

Step S604: and the private network cell sends the mapping relation between the high-level information and the physical resource position to the UE. The steps are optional steps and have no strict sequence relation with other steps. The mapping relationship may be defined in a protocol, and the UE side may store the mapping relationship in advance. The mapping relationship may be represented by an index, and the index of the mapping relationship may be predetermined by the network and the UE, or may be defined by a protocol, and the index of the mapping relationship may be stored by the network and the UE.

After the private network cell determines the mapping relationship between the high-level information and the physical resource location, the private network cell issues the index of the mapping relationship to the UE allowed to access (the network side pre-stores the UE list allowed to access by the CSG). The index issuing mode may be: broadcasting a location index of the code sequence in system information, the UE saving the location index as part of fingerprint information for future network measurements; or the network side sends the RE location index of the code sequence to the UE through the application layer protocol OMA/OTA DM. Another alternative is to directly send the specific mapping relationship content to the UE.

Step S605: the UE stores the mapping relation and obtains the high-level information of the cell through the mapping relation.

This step may include: the UE receives a code sequence at a physical resource location included in a pre-stored mapping relationship, and performs a correlation operation on the pre-stored code sequence and the received code sequence, for example, the correlation operation may be performed in a frequency domain or a time domain, and if the correlation is performed, the physical resource location and the corresponding high-level information in the mapping relationship are used as the high-level information transmitted by the cell. And if no strong correlation exists, continuing to perform correlation operation on other physical resource positions by adopting the pre-stored code sequence and the received code sequence.

The following description will be made in detail by taking higher layer information as information (such as CSG ID) for allowing access:

when the UE enters a private network cell, information of the surrounding radio environment (PCI, frequency, location information, etc.) is measured and stored as fingerprint information (fingerprint information). In this embodiment, when the UE resides in a private network cell, the system information is read or an index of a mapping relationship issued by an application layer message is received, and the index is stored as fingerprint information (fingerprint information).

The PCI Range of the private network cell is CSG-PCI-Range, and the cells with the PCI within the Range of the CSG-PCI-Range are all private network cells. When the UE enters the private network cell, the UE starts to measure the private network cell according to the fingerprint information, and two different processing methods are provided according to whether the UE stores CSG-PCI-Range or not:

(1) if the UE stores CSG-PCI-Range information:

first, a private network cell is determined by measuring and reading the PCIs of neighboring cells. And reading the PCI of the cell from the synchronous channel, comparing the PCI with the stored CSG-PCI-Range, and if the PCI of the cell is in the CSG-PCI-Range, indicating that the cell is a private network cell.

And then, receiving a code sequence at a physical resource position corresponding to the access permission information in the private network cell according to the stored mapping relation, carrying out correlation operation on the received code sequence and the pre-stored code sequence, and if the received code sequence is correlated with the pre-stored code sequence, indicating that the private network cell permits the UE to access.

2) If the UE does not save CSG-PCI-Range information:

and receiving code sequences at physical resource positions corresponding to the access permission information in all the adjacent cells according to the stored mapping relation, carrying out correlation operation on the received code sequences and the pre-stored code sequences, and if the received code sequences are correlated, indicating that the private network cell permits the UE to access.

The physical resource locations occupied by code sequences may be continuous or discrete. In this embodiment, the code sequences transmitted by the respective cells are the same, and different higher layer information is distinguished by different positions of the code sequences transmitted by different cells. For example, a central 1.25MHz RE may be selected, and an entire cell bandwidth RE may be selected. Since the same RE can belong to different RE groups, a large number of RE groups can be selected after combination.

Example 2:

the present embodiment utilizes the combination of code sequences and physical resource locations to express any kind of high-level information. The code sequences and physical resource positions used by different cells are different, and the cells store the mapping relation of the high-level information, the physical resource positions and the code sequences for identifying the cells. The mapping relation may refer to table 1.

The code sequence may be an orthogonal code sequence, and the embodiment may map the CSG ID or ECGI of the private network cell to the code sequence, or map a part (e.g., lower 10 bits) of the CSG ID or ECGI to the code sequence. If the whole CSG ID is mapped to the code sequence, because the CSG ID is a number with the length of 27 bits, the number is expressed by an orthogonal code sequence of the number with the length of 27 bits, different number sequences can be arranged at different positions, and the UE can acquire the code sequence at the position to carry out correlation operation. For example, if lower 10 bits are mapped, the lower 10 bits of each CSG ID in the list stored by the UE are compared. Fig. 8 is a flowchart of a method for information transmission according to the present embodiment. As shown in fig. 8:

step S801: the private network cell determines the mapping relationship of the high-level information, the physical resource location and the code sequence.

This step can be achieved by: the private network first determines the length of the code sequence to be carried, and then calculates the number of RE required based on the determined length, which can be implemented by referring to the determination method in embodiment 1, assuming that the code sequence to be carried needs 6 RE.

Then, the private network selects RE locations carrying code sequences, REs except for REs occupied by reference signals and synchronization signals in fig. 1 are used as candidate resources for transmitting code sequences, and every 6 REs are divided into one Group (RE Group), with one index number for each Group. After the private network is started, a network management node (including SON server) is requested, and the network management node uniformly distributes the position and the orthogonal code of the RE for the private network cell. As optimization, the private network measures adjacent macro cells, and the RE position and the code sequence distributed by the network management node are unique in the macro cells; or the RE positions and code sequences of private network cells with the same PCI under the macro cell are different; or randomly selecting an index and code sequence of an RE group at the time of private network startup, i.e., randomly selecting an RE location and code sequence. As shown in fig. 7, the private network cell selects a RE group with index 3.

Step S802, the private network cell determines the physical resource location information and the code sequence corresponding to the high-level information to be transmitted according to the mapping relation, and sends the corresponding code sequence on the corresponding physical resource location.

Step S803: and the private network cell sends the mapping relation of the high-level information, the physical resource position and the code sequence to the UE.

This step is optional, the mapping relationship may also be specified in the protocol, and the UE side may store the mapping relationship in advance. The mapping relationship may be represented by an index, and the index of the mapping relationship may be predetermined by the network and the UE, or may be defined by a protocol, and the index of the mapping relationship may be stored by the network and the UE. After determining the high-level information to be sent, the private network cell sends the index of the mapping relation containing the high-level information to the UE which is allowed to be accessed.

The issuing mode may be: broadcasting a location index of the code sequence in system information, the UE saving the location index as part of fingerprint information for future network measurements; or the network side sends the RE location index of the code sequence to the UE through the application layer protocol OMA/OTA DM. Another alternative is to directly send the specific mapping relationship content to the UE.

Step S804: the UE stores the mapping relation and obtains the high-level information of the cell through the mapping relation.

This step may include: the UE obtains the mapping relation between the high-level information and the physical resource position information and the code sequence loaded on the physical resource position information; then, the UE receives the code sequence at the physical resource location, and performs correlation operation (correlation operation may be performed in the frequency domain or the time domain) on the code sequence included in the pre-stored mapping relationship and the received code sequence; and if the correlation exists, the high-level information corresponding to the physical resource position and the code sequence meeting the correlation condition in the stored mapping relation is used as the high-level information transmitted by the cell. If no strong correlation occurs, the remaining pre-stored code sequences continue to be correlated with the received code sequences until no code sequences remain.

(1) if the UE stores CSG-PCI-Range information:

first, a private network cell is determined by measuring and reading the PCIs of neighboring cells. Firstly, reading the PCI of the cell from the synchronous channel, and then comparing with the stored CSG-PCI-Range, if the PCI of the cell is in the CSG-PCI-Range, the cell is indicated as a private network cell.

2) If the UE does not save CSG-PCI-Range information:

It should be noted that the longer the code sequence, the better the orthogonality. The code sequence length can be varied as required, and the REs occupied by the code sequence can be continuous or discrete. In this embodiment, the code sequences transmitted by the respective cells and the positions of the transmitted code sequences are different. The center 1.25MHz RE may be selected, as may the entire cell bandwidth RE. Besides the method of using the index mapping relation, the method of directly issuing the mapping relation can also be used.

Example 3:

the embodiment provides a method for switching UE. Based on the methods of embodiments 1 and 2, the UE identifies whether the cell allows access or identifies the CSG ID/ECGI of the cell, and the identified result may be applied to the handover procedure of the UE.

When the UE in the connected state triggers or receives a network side command to start measuring the neighboring private network cell according to the saved fingerprint information, the UE identifies whether the cell allows access or the CSG ID/ECGI of the cell according to the method of the previous embodiment. The switching process is different according to the different identification results of the UE. One situation is: and when the digital sequence is the extension of the PCI and is not mapped to CSG ID/ECGI, the UE performs strong correlation operation according to the digital sequence issued on the physical resource position of the cell and the digital sequence stored by the UE on the position, and if the strong correlation indicates that the adjacent cell is a private network cell which is allowed to be accessed. The other situation is that: when the digit sequence is mapped to CSG ID/ECGI, the UE identifies the CSG ID/ECGI of the adjacent cell to judge whether to allow access.

Fig. 9 is a flowchart illustrating a handover performed by a terminal according to high-level information according to an embodiment of the present invention. For the first case, the handover method shown in fig. 14 is employed, as shown in fig. 9:

step S901, UE measures the signal intensity and signal quality of the adjacent private network cell, and triggers to search the private network cell according to the fingerprint information or the network side command when judging that the signal intensity and signal quality reach a certain threshold or meet the reporting criterion of the measurement event;

step S902, UE reads PCI from synchronous channel, judge whether the PCI locates at CSG-PCI-range prestored, if locate, judge the cell is the private network cell, and discern whether the cell allows to insert according to code sequence received and mapping relation preserved;

this step can be performed with reference to the methods of embodiments 1 and 2, taking the method of embodiment 2 as an example, and specifically includes: receiving a code sequence at a physical resource position corresponding to the access permission information, carrying out correlation operation on the received code sequence and the code sequence corresponding to the access permission information, and if correlation exists, indicating that the private network cell is a cell permitted to be accessed;

step S903, UE initiates a cell update or RRC reestablishment request to a target private network cell, and the cell update or RRC connection reestablishment request carries a cell identifier of a source macro cell;

step S904, the target private network cell replies RRC reestablishment confirmation message to the UE;

step S905, the target private network cell sends a request message to the source macro cell, and requests the source macro cell to send the context information of the UE;

step S906, the source macro cell sends UE context to the target private network cell and forwards data;

step S907, the UE sends a reestablishment complete message to the target private network cell.

Fig. 10 is a second flowchart of the terminal performing handover according to higher layer information according to the embodiment of the present invention. For the second case, the handover method shown in fig. 10 is adopted, as shown in fig. 10:

step S1001, UE measures signal intensity and signal quality of adjacent private network cells, and triggers and searches the private network cells according to fingerprint information or network side commands when judging that the signal intensity and the signal quality reach a certain threshold or meet the reporting criteria of a measurement event;

step S1002, the UE carries out correlation operation by receiving code sequences at corresponding positions and self-prestored code sequences according to the prestored mapping relation, and identifies CSG ID, ECGI or TAI of a cell;

step S1003, UE reports a measurement report to a source macro cell, wherein the measurement report comprises one or a combination of CSG ID, ECGI and TAI of a target private network cell;

step S1004, the source macro cell sends a switching request message to the target private network cell, wherein the switching request carries the context information of the UE;

step S1005, the target private network cell sends a switching confirmation message to the source macro cell;

step S1006, the source macro cell sends a switching command to the UE;

step S1007, UE accesses to target private network cell;

step S1008, the UE completes the handover process and performs data forwarding.

It should be noted that: the method can also be adopted for cell reselection of the UE in an idle state, and when the UE triggers or receives a network side command to start measuring an adjacent private network cell according to the stored fingerprint information, whether the adjacent cell is allowed to be accessed can be judged without reading system information of the adjacent cell.

The terminal of this embodiment can obtain information whether the cell allows the UE to access based on the high-level information obtaining method of embodiment 2, and can actively initiate handover to the target private network cell according to the high-level information.

The physical resource mentioned in the embodiments of the present invention refers to a physical medium for carrying information, and in a wireless communication system, refers to a wireless resource. Time referred to in the time domain; in the frequency domain may be a carrier frequency. The representation of these physical resources depends on the multiple access scheme adopted by the wireless communication system, such as tdm (time Division multiplexing), fdm (frequency Division multiplexing), OFDM, etc.

The code sequences mentioned in the embodiments of the present invention include, but are not limited to: symbols modulated by modulation techniques in a communication system, such as QPSK modulated, QAM modulated, these symbols having memory properties in terms of phase or frequency, amplitude; or a direct bit sequence, such as a multi-digit sequence like a 0101. Or some code sequences with special properties, such as: ZC sequences, OVSF codes, Gold codes, etc., which usually have good orthogonality or are a complex sequence.

The method and the device of the embodiment of the invention directly transmit and express the high-level information of the protocol stack at the signal level of the physical layer, provide richer information expression modes, and effectively solve the PCI conflict problem and the private network access control problem in the current LTE system by loading a certain special code sequence on a certain/certain specific physical resources and expressing the certain/certain specific high-level information by various combinations of position information and sequence information.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have 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 still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An information delivery method, the method comprising:

determining a mapping relation, wherein the mapping relation comprises mapping of high-level information and a physical resource position;

and determining a physical resource position corresponding to the high-level information needing to be transmitted according to the mapping relation, and transmitting the code sequence on the physical resource position.

2. The method of claim 1, wherein the mapping relationship further comprises a mapping between the cell higher layer information, the physical resource location, and the code sequence.

3. The method according to claim 1 or 2, characterized in that the method further comprises: and sending the mapping relation to a terminal.

4. The method of claim 3, wherein the mapping relationship is represented by an index, and wherein sending the mapping relationship to a terminal comprises:

sending the index of the mapping relation to a terminal in system information; or,

and sending the index of the mapping relation to the terminal through an application layer protocol.

5. A method according to claim 1 or 2, characterized in that the high layer information comprises any one or more combinations of the following information:

extended physical cell identity, evolved global cell identity, closed subscriber group identity, access right information of the cell.

6. An information acquisition method, comprising:

receiving a code sequence sent by a cell, wherein the cell determines a physical resource position corresponding to high-level information needing to be transmitted according to a mapping relation, and the code sequence is sent on the physical resource position; the mapping relation comprises mapping of the high-level information and the physical resource position;

and acquiring the mapping relation, and determining the high-level information according to the code sequence and the mapping relation.

7. The method of claim 6, wherein the mapping relationship further comprises a mapping between the cell higher layer information, the physical resource location, and the code sequence.

8. The method according to claim 6 or 7, wherein the obtaining the mapping relationship comprises:

pre-storing the mapping relation; or,

the mapping relation is represented by an index, and the index of the mapping relation sent in system information is received, or the index of the mapping relation sent by an application layer protocol is received.

9. A base station, comprising:

the mapping relation determining unit is used for determining a mapping relation, and the mapping relation comprises mapping between high-level information and a physical resource position;

10. The base station according to claim 9, wherein the mapping relation determined by the mapping relation determining unit further includes mapping between the cell higher layer information, the physical resource location and the code sequence.

11. The base station according to claim 9 or 10, characterized in that the base station further comprises:

and the mapping relation sending unit is used for sending the mapping relation determined by the mapping relation determining unit to the terminal.

12. A terminal device, characterized in that the terminal device comprises:

a mapping relation obtaining unit, configured to obtain a mapping relation, where the mapping relation includes mapping between the high-level information and the physical resource location;

a high-level information acquisition unit, configured to receive a code sequence sent by a cell, where the code sequence is sent by the cell, and determines, according to the mapping relationship, a physical resource location corresponding to high-level information to be transmitted, and sends the code sequence on the physical resource location; and determining the high-layer information according to the code sequence and the mapping relation.

13. The terminal device of claim 12,

the mapping relationship obtained by the mapping relationship obtaining unit further includes mapping between the cell high-level information, the physical resource location, and the code sequence.

14. The terminal device of claim 13,

the higher layer information acquisition unit is further configured to perform correlation operation on the received code sequence and the code sequence included in the mapping relationship; and if the mapping relation is relevant, determining the high-level information contained in the mapping relation as the high-level information transferred by the cell.

15. The terminal device according to any one of claims 12 to 14, when the cell is a private network cell, wherein the terminal device further comprises:

and the switching unit is used for switching among the private network cells according to the high-level information of the private network cells.