JP2019062559A - Wireless communication system for distributing system information - Google Patents

Abstract

To provide a radio access communication network system that sets at least an SA-cell as data connection configured to have a terminal in an execution mode and forms an LA-cell in the same group in a standby mode, which provides a method and system for distributing the conventional network system in a more energy efficient manner.SOLUTION: According to a method in which a terminal acquires information including at least system information of a LA-cell and system information of a SA-cell, when a terminal is in an execution mode, the wireless communication interface between the SA-cell and the terminal is valid and the terminal receives the SA-cell first system information and LA-cell first system information from the SA-cell via the SA-cell communication interface.SELECTED DRAWING: Figure 10

Description

  In general, the invention relates to the field of wireless communications. More particularly, the invention relates to the field of delivering system information from a cell to a terminal.

  The radio access communication network (system) of the cell phone is, for example, called a radio base station, GSM (registered trademark), WCDMA (registered trademark) consisting of Node Bs (UMTS), LTE consisting of improved Node Bs or eNBs It is also typically known to include multiple base stations. The base station comprises at least a transceiver device, also formally known as a UE (user equipment), supporting radio communication with a standardized (possibly mobile) terminal. The range that can be covered by the transmitter / receiver at the base station is limited. The area serviceable by a base station transmitter / receiver is referred to as its "cover area" or "cell". As used herein, the term "cell" refers to both the base station itself and its associated coverage area. In general, a cell may be associated with a particular sector extending radially (e.g., 120 degrees) from the base station location, and multiple sectors (cells) may cover the entire base station location area or may be of interest. It may cover high specific sectors (e.g., sections of the highway that cover narrow sectors).

  The cells (base stations) in the cellular network are connected to the rest of the network via one or more trunks, which are typically optical fiber, copper wire or radio, for example. The base station has processing capabilities such as radio transmission / reception between a base station and a terminal, between a base station and a network including other base stations (cells), and protocol specification, for example.

  In a cellular network, different cells may have different sizes, eg indicated as macro cells, micro cells, pico cells or femto cells in descending order of cell size. A cell can exhibit partial overlap with nearby cells, and smaller cells (eg, pico cells) can completely overlap with large cells (eg, macro cells). A plurality of cells may thus form a cellular network provided adjacent to a continuous range within a very large area.

In cellular wireless networks, it is common to distinguish terminals by being in "standby mode" or "run mode". In the run mode, the terminal can exchange data (eg, receive / send email, make a call) via the cell in which the terminal is located. This requires resources in the network (e.g. frequency and / or signal and / or time zone) and also terminals and the network to supply power for the purpose. The terminal in the standby mode can not exchange data, so it does not need the above resources and consumes less power. The terminal in standby mode periodically listens to the signal communicated by the cell and selects a signal that the terminal strongly receives, eg, the cell that is the "best cell". The terminal in standby mode also monitors the computer paging channel transmitted by the cell selected for the paging message that addressed the terminal. A cell in which such a (standby mode) terminal is selected is called camp on. For example, due to the mobility of the terminal, if another cell is identified as the best cell, the terminal can reselect the "best cell" and the newly selected cell of camp-on as another cell. It should be noted that this does not notify the cell and / or the network for the cell selected to camp on if the terminal in standby mode normally does not reselect another cell as the best cell either. . When reselecting a terminal to a cell that has been found to be another location area (LA or RA-routing area), the terminal, which the terminal can determine from the system information of the cell, contacts via the network (Including the exchange of signaling or network control messages between the terminal and the cell), select a new cell to perform the LA or RA update procedure, and then, as described above, the monitoring operation. Resume. Therefore, the LA / RA network, which is usually set up by the network operator, is notified from terminals located on the LA / RA including a plurality of cells as being in a standby state. As a result, the network does not recognize that a terminal in standby mode has camped on a cell, but only recognizes that a terminal in LA / RA standby mode has been deployed (scheduled).

  In a cellular network for wireless communications, each cell, wireless base station, node B, or retrofit node B, during data communications operations, so-called "system information" for reception by terminals within the coverage area of the cell. Data communication is common. In FIG. 1 where this is schematically shown, the cell 1 is a terminal which indicates that the system information is in data communication with the system information 9 within the coverage area within the cell (illustrated as a lightly shaded area in FIG. 1) 2 may be received, or the cell 1 may be connected to the network 3.

  The system information transmitted by the cells may relate to a wide variety of information related to the cells and / or operations on the network. The terminal gives some examples of system information and possible uses of that information. Those skilled in the art will appreciate that the system information includes other system information as well as one or more of these examples, according to the terminal itself receiving and setting system information It will be understood that good.

  In one example, the system information may be, for example, a public land mobile network (PLMN), a terminal capable of receiving system information to determine if it can be used in the cell, and possibly all of the cells. May include a display of the network. In another example, the system information may include an indication of the state of the cell, eg whether or not the cell is in operation, or if any restrictions, eg access class, apply. Such information allows the terminal to determine at the moment if it can use the cell. Furthermore, the system information may include an identification of a cell (cell ID) that enables the terminal to determine the identity of cells in the network. In yet another embodiment, the system information may be, for example, a frequency or frequency band or code or operating time zone of the cell, information on the setting of the channel provided by the cell, the correct setting for receiving the various channels of the cell For example, the frequency, channel, and code may include an indication of the configuration of the cell, such as the parameters of the RACH (Random Access Channel) such that the terminal enables initial connection with that cell. . Furthermore, the system information may, for example, transmit identity and / or frequency and / or information on neighboring cells, eg, neighboring cell lists, including identification symbols, transmission frequencies, codes, operating times of neighboring cells. May be included. The network may for example be GSM® (GERAN-GPRS / EDGE Radio Access Network), UMTS (UTRAN-UMTS Terrestrial Radio Access Network, WCDMA®-Wideband Code Division Multiple Access), or LTE (E- Adjacent cell information may be separately supplied, for example, for each RAT, in the case of supporting a plurality of radio access technologies (RATs) such as UTRAN (Advanced UTRAN, OFDM using Orthogonal Frequency Division Multiplexing). This enables and facilitates the search for (promptly) neighboring cells, e.g. to evaluate neighboring cells for the purpose of reselection of potential cells or handovers. In yet another example, the system information is applied, for example, in the reselection cell and / or the starting point of execution and / or the measurements on neighboring cells and / or frequencies and / or networks in other cells or in cells It may also include an indication of the criteria for the RAT for which information to the network terminal has been granted about the criteria to be done.

It is common for cells to communicate system information over data communication channels, for example, so that all terminals within the coverage area of the cell can receive the system information of the cell. Usually, the cells transmit system information periodically, in order, and repeat periodic system information transmission in a fairly continuous manner, for example, a carousel-like structure as shown in FIG. As shown in FIG. 2, cycle 4 includes system information shown as system information blocks M, S1, S2, S3 and S4, organized in different categories. While blocks S1-S4 try to exemplify additional system information blocks (SIBs) with additional information that may be needed only for some terminals, most or only blocks M containing essential system information are We will try to illustrate the master information block (MIB) required for all terminals in the network. Cycle 4 may then be repeated continuously, as shown in array 5 of transmitted system information. As shown in array 6 that the last occurrence of blocks S3 and S4 shown in array 6 can be replaced by a new block of system information S5 and S6, some blocks of system information are some other blocks May be replaced with Nevertheless, as shown in FIG. 2, in both sequences 5 and 6, system information is transmitted continuously.

  There is an exchange between the use of a large portion of cell resources (e.g., high bit rate and / or wide frequency bandwidth) and the use of a smaller portion of cell resources for data communication of system information. Using most of the resources, short cycle times can be realized, allowing the terminal to receive all of the system information with a slight delay, but requiring considerable resources of the cell. In contrast, when using a smaller portion of resources, the terminal must accept longer latencies as it receives all or particular portions of system information, resulting in longer cycle times .

  Full consideration of current state-of-the-art technology is given to the implementation of a flexible and efficient method for distributing system information. Nevertheless, in fact, data communication of this information requires some of the resources of the cell, and is also part of the transmit power and energy consumption of the cell. It should be noted that this consumption is substantially continuous, even at a small percentage of the peak power of the cell (e.g. less than 10%). In particular, the distribution of system information during a slight traffic load period may be configured to greatly exceed the percentage. Thus, the conventional network structure seems to have room for improvement in the delivery of system information in a more resource efficient manner.

  Recently, new and more energy efficient network structures are being developed. One aspect of the new structure is the use of relatively small cells. High bit rate data connections are much more likely to be populated by smaller (eg at least partially overlapping) micro cells (eg microcells, picocells, femtocells) than smaller cells (eg macrocells) with larger numbers It can be supplied efficiently. As a further aspect in the new structure, the power consumption of the cell is to provide as realistic a service as possible on a scale that is assumed to be reduced (eg, provision of the number of execution terminals, the bit rate provided to the terminals, Such as the distance by the connection to the terminal). One approach to achieving this vision, for example, involves switching the cell almost completely off and putting in the terminal in the power save mode the cell that is not actually running. Another complementary approach involves reducing or refraining from transmitting general data signaling in conventional networks. Especially for cells that operate with less than full load of these data signaling transmissions, in fact, they cause overloading.

FIG. 3 schematically showing a new structure is supposed to distinguish different types of cells. The first type of cell in this specification is referred to as "SA-cell" and primarily supports wireless exchange of data with the active terminal 2, as shown in Fig. 3 as cell 7. Optimized for The energy efficiency improvement as described above focuses on the SA-cell. The second type of cell in this specification is referred to as "LA-cell", and as shown in FIG. 3 as cell 8, mainly within the cellular network, including those found in conventional networks. Optimize your features. Therefore, it is assumed to reduce over-loading in the system as attributed to the LA-cell.

  The LA-cell typically covers, for example, a large area, comparable to that of a conventional macrocell. The LA-cells often together provide near continuous coverage within the desired area to be covered, as in a conventional network. The LA-cell may communicate system information as well as many conventional cells. That is, the terminal in the standby state may camp on the LA-cell, or initiate a transmit signal connection with, for example, the LA-cell to perform an LA / RA update or leave the network. You may

  An SA-cell, for example, covers a smaller area, typically comparable to that of a conventional microcell, picocell or femtocell. The SA-cells may together support a specific bit rate in the desired contiguous contiguous area. So far, the SA-cell transmits a signal only when it is necessary. That is, it may normally be considered to be in the off or power save or standby mode. A terminal in standby is not camped on the SA-cell. Such networks are called "Beyond Cellular Green Generation" (BCG2) networks, but this term may be changed in the future. Thus, in the specification of the present application, a network having such a structure will be referred to as an "energy efficient cellular radio network".

  Within the energy efficient cellular radio network, the terminal may handle two types of cells, one or more LA-cells and one or more SA-cells, and one or more associated LAs. Cell system information and one or more associated SA-cell system information may be required. Two problems may then occur.

  One problem is that when a terminal in idle state is running, ie if the terminal in idle state establishes a data connection, then normally an appropriate SA-cell will support the establishment of data connection. It comes from the fact that it needs to be selected and is attributed to the process as "setting up the data connection". Some solutions for establishing a data connection may require the terminal to obtain relevant system information, such as cell ID, frame time, cell bandwidth etc., from one or more candidate SA-cells. unknown. If an appropriate SA-cell for data connection is selected, the terminal may add necessary system information for that SA-cell. If the selected SA-cell is currently off or in the energy saving mode that is part of the BCG2 concept, it is necessary to operate the SA-cell. Selection and operation of appropriate SA-cells may require time. It may take some time for the SA-cell to operate sufficiently by providing the necessary system information to the terminal. Also, the concept of a high energy efficiency cellular radio network assuming a dynamic cell was previously obtained for a particular SA-cell (eg, system information for SA-cell acquired and stored during previous data connection setup) Using stored SA-cell system information has a high risk that the previously acquired SA-cell system information is no longer valid. Therefore, it is necessary to provide the terminal with relevant and up-to-date SA-cell system information in order to enable the rapid establishment of data connection with the appropriate SA-cell.

Another problem arises from the fact that when the terminal in the active state resumes the standby mode after closing all data connections, the terminal needs to camp on the LA-cell again. For this purpose, the terminal may need to obtain relevant system information such as cell ID, frame time, cell bandwidth, channel paging etc from one or more candidate LA-cells. While not, the terminal performs cell search and / or cell reselection procedures. In the context of an energy efficient cellular radio network, the dynamic, but not necessarily, LA-cell structure, and then the SA-cell structure, previously acquired LA-cell system information (eg, previously established and acquired data connections Using LA-cell system information) carries the risk that the previously acquired and stored LA-cell system information is no longer valid. This is because, for example, the LA-cell system information has been changed to an average time, or an example where the LA-cell system information is no longer relevant, for example, another LA-cell having no previously obtained and stored information. It may be the case that it has moved to the cover area. In order to obtain related and up-to-date LA-cell system information, the terminal may perform the cell search procedure again, similar to the power-up cell search procedure. Thus, it may take time until the terminal discovers an LA-cell suitable for camp-on again and can monitor the paging channel of that LA-cell. As a result, when the terminal resumes the standby mode after the run mode, it promptly determines whether the appropriate LA-cell (previously established data connection, a cell that is one of the camped-on LA-cells, the same or different). In order to re-camp on, there is also a need for the terminal to be provided with relevant LA-cell system information relevant.

  As indicated above, what is needed in the art is a method and system for delivering conventional network system information in a more energy efficient manner. In addition, what is needed in the art, eg, a method and system for distributing LA-cell system information and SA-cell system information in an energy efficient cellular radio network such as a BCG2 network, It is possible to solve the problems described above. And preferably, it is to impose communication resource efficiency, energy efficiency, and hardware and computer resource restriction requirements on the terminal.

  According to one aspect of the invention, a radio access comprising at least an SA-cell configured with a terminal in run mode to establish a data connection and an LA-cell configured to camp on in a standby mode A method is disclosed for a terminal to obtain at least LA-cell system information and SA-cell system information in a communication network system. The method comprises: when the terminal is in the run mode and enables the SA-cell communication interface, the terminal is SA-cell with first system information of the SA-cell and first system information of the LA-cell. A method is provided for receiving from an SA-cell via a communication interface.

  This solution transmits SA-cell system information possibly associated with terminals in the coverage area of the SA-cell, as well as at least LA-cell system information considered to be part of the LA-cell. It is based on the idea that it may be used to In another form, the SA-cell may be configured to use one or more dedicated channels, with an execution terminal for transmitting at least a portion of the system information to the individual terminals. , SA-cell may be configured to use data communication / common channel to transmit all system information about the terminal.

The method of embodiments may further include a terminal configuring one or more settings based at least in part on the received SA-cell system information and / or LA-cell system information. Additionally or alternatively, the terminal may store at least a portion of the received SA-cell system information and / or LA-cell system information for future use. In a further embodiment, terminals in standby state who wish to remain in standby mode just apply what they have received, whereas SA-cell system information is stored for later use. Perhaps it only stores LA-cell system information to configure settings. The terminal will only try to receive and try to store SA-cell system information which will configure the settings for the particular SA-cell of the terminal to be connected and / or connected when it is going to enter the run mode.

  As used herein, the expressions "use information transmitted by cell to terminal", "information to terminal" and variations thereof are described as, for example, system information intended for a terminal to be useful. doing. For example, some system information may be intended primarily for terminals in the standby mode, or for terminals in the execution mode, regardless of the mode. In this regard, it does not matter whether the system information sent by the cell is actually received and / or actually used by the terminal. For example, in order to receive system information, the cell transmits its system information via a data communication channel available at all terminals within the coverage area of the cell. However, in reality, only some of these terminals are interested in the transmitted system information and others are not. Also, perhaps some, but not all, only some terminals interested in the transmitted system information actually receive it, others (eg transmission errors, the terminal performing other tasks And so on), and others simply ignore the transmission, perhaps intentionally, for example since they have previously received the transmitted system information.

  In the context of embodiments of the present invention, the expressions "LA-cell" and "SA-cell" are used to distinguish two different types of cells.

  The first type of cell, LA-cell (large area cell), refers to a cell that can cover a larger area at a smaller bit rate as compared to the second type of cell. The LA-cell is mainly intended to carry signaling messages from terminal to terminal, for example at least it is intended to be able to call the terminal. Furthermore, terminals in standby mode may be used to "camp on" at least one of these LA-cells. While the LA-cell is not primarily intended to be used for terminal-to-terminal transmission, it also excludes other signaling, paging, or user data transmissions that occur over the LA-cell. I did not. Within the intended coverage area of the radio access network, at least one LA-cell may be used at full operation, in other words with the LA-cell being "always on".

  The second type of cell refers to a cell that can cover a smaller area at a higher bit rate as compared to an SA-cell (small area cell), LA-cell. The SA-cell is primarily intended for the transmission of user data from the terminal that established the data connection to the terminal (ie the SA-cell is mainly to handle the connection with the terminal in the active state) . However, it also does not exclude the transmission of some other information and / or part of the signal via the SA-cell. Within the intended coverage area of the radio access network, at least one SA-cell may be used for being able to provide the coverage area. The SA-cell only operates fully when in the required range. In other words, it is in the "always off" state.

  According to various embodiments of the present invention, SA-cells may occur in any combination of frequency band and / or radio access technology (RAT). Larger SA-cells may also be provided at high mobile terminals, with SA-cells of different sizes (eg, macro, micro, pico and femto SA-cells, eg with or without hierarchical structure) It is neither good nor exclusion.

As used herein, the expression "data connection between the terminal and the SA-cell" means a wireless communication path for user data exchange between the terminal and the SA-cell. The communication path for user data including the section between the terminal and the SA-cell is usually set according to the setting of the parameters,
For example, it depends on the type of user data (e.g. send / receive mail, voice or video calls etc) that needs to be exchanged. The parameter settings, generally referred to in the art as "QoS parameters" or "QoS profiles", include, for example, maximum bit rate, guaranteed (minimum) bit rate, bit error rate, delay / latency, etc. It may contain parameters.

  In contrast, the exchange of signaling messages between the terminal and the LA-cell does not involve user data and is exchanged within the communication system, for example, between the terminal and various entities. Signaling messages may be exchanged via a "signaling connection" without establishing a data connection or with a reasonable bit rate and with sufficient quality of signaling information arriving with very little loss. In the signal connection in use, the independent parameter in "data connection" occupies most and may be associated with it.

  Furthermore, the terms "user data" and "user terminal" do not necessarily require human intervention, and in embodiments of the present invention, e.g. email checks without human intervention on the smartphone, machine to machine It is understood that (M2M) communication and / or machine type communication (MTC) may be applied. The term "user data" is used merely to distinguish between real data exchanged over data connection and exchange via signal.

  As described herein, the terminal may be in either "run mode" or "standby mode". As used herein, the expression "terminal in standby mode" camps on the LA-cell, even in the case of terminals that neither exchange nor can exchange user data, terminals from the LA-cell Refers to a terminal that enables monitoring of paging for In other words, the expression "terminal in standby mode" is used to describe a terminal that does not support wireless exchange of user data between the terminal and the SA-cell. In contrast, the expression "terminal in execution mode" refers to a terminal capable of exchanging user data or exchanging user data via at least one SA-cell. In other words, the active terminal may support or support the wireless exchange of user data between the terminal and the SA-cell. Although these concepts of standby mode and execution mode may be comparable to concepts such as standardized conventional networks, they do not always exactly match standardized definitions.

  In one embodiment, the method is such that, if the terminal is in run mode and the terminal's SA-cell radio interface is enabled, the terminal transmits at least a number of SA-cells via the SA-cell radio interface. The method further includes receiving the portion of the two system information and / or a portion of the SA-cell system information for one or more SA-cells in the wireless communication network. Such an embodiment advantageously provides the terminal with system information on neighboring SA-cells. In one embodiment, the terminal may provide the terminal with information on the SA-cell to which the data connection has been made with respect to system information via other SA-cells rather than the SA-cell itself in which the terminal has established the data connection. it can. That is, this embodiment can obtain system information on other SA-cells, in particular, without the terminal having a data connection with those cells, and one or more of those SA-cells can It is an energy efficient network because it is even in a non-running state. For the embodiment, each of the other SA-Cells may provide system information to the terminal independently, or the terminal may receive system information from another SA-Cell via its SA-Cell Radio Interface. May be

The method of the embodiment further comprises that the terminal receives at least a portion of the second system information of the LA-cell when the terminal is in standby mode and has enabled the LA-cell radio interface of the terminal. It contains. In order to support terminals in idle state, the SA-cell is likely to transmit SA-cell system information as well as LA-cell system information for at least a portion of the LA-cells associated with the terminals in the SA-cell coverage area. Although it may be used, it may still require transmission by the LA-cell. In a further embodiment, the method further comprises, if the terminal is in standby mode and the terminal's LA-cell radio interface is enabled, the terminal at least for part of the second system information of the SA-cell. , Receiving from the LA-cell via the LA-cell radio interface.

  In an embodiment, the method further comprises that the terminal is at least one or more other LAs in the wireless communication network if the terminal is in run mode and the terminal's SA-cell radio interface is enabled. -Receiving from the SA-cell via the SA-cell radio interface, part of the LA-cell system information for the cell. In this way, the terminal in the run mode may obtain not only system information on the LA-cell that has been camped on previously, but also system information related to other LA-cells.

In an embodiment, the method further disables the SA-cell wireless interface when the LA-cell wireless interface is enabled and disables the LA-cell wireless interface when the SA-cell wireless interface is enabled. It includes that.

  According to another aspect of the present invention, an SA-cell for use in the methods described herein is disclosed. The SA-cell at least acquires the first system information of the LA-cell from the LA-cell and / or from the network manager in the wireless communication network, and at least the first system information of the LA-cell And at least a portion of the first system information of the SA-cell. In an embodiment, the SA-cell obtains system information regarding the other SA-cell or other LA-cell that can be obtained directly from the other cell and / or from the network manager of the radio access communication network, It may be configured to send.

  In an embodiment, a portion of the first system information of the LA-cell and / or a portion of the first system information of the SA-cell comprises a first period adjacent to the second period and the LA-cell system information A period during which part of SA-cell system information is not transmitted may be repeatedly transmitted. Furthermore, in an embodiment, the second period may be at least as long as the first period.

  In an embodiment, at least part of the first system information of the LA-cell and / or at least part of the first system information of the SA-cell is a terminal, an LA-cell, furthermore, a node of a wireless communication network, or , And may be transmitted to the SA-cell that has received the trigger from the network management unit. In a further embodiment, at least a portion of the first system information of the LA-cell and / or at least a portion of the first system information of the SA-cell are transmitted in accordance with receipt of the trigger after expiration of the predetermined delay period. May be

Also, for the solution described above, the SA-cell may possibly be more LA-cells similar to the transmission of system information on at least one LA-cell and at least system information on the SA-cell itself. You can expect to send system information about It is also possible that an SA-cell may, for example, transmit system information of several other SA-cells regarding all its neighbors. In such cases, it may be expected that much of the system information is the same for multiple SA-cells, or at least for fractions of the SA-cell group. This situation in which the SA-cell may be configured to transmit system information to the terminal in such a way that parts of the same system information do not overlap between different cells is a very efficient way of transmission. So, of course, the information still needs to be transmitted in such a way that the terminal can identify the system information about the cell, but one of ordinary skill in the art guarantees that various methods can be easily conceived, according to the invention. Support all within range.

  According to another aspect of the invention, an example of use of the LA-cell is disclosed herein. The LA-cell is configured to provide at least a portion of the first system information of the LA-cell to one of the plurality of SA-cells in the wireless communication network for transmission to the terminal. .

  According to another aspect of the present invention, a terminal, a part of a computer program (perhaps distributed) for performing various functions, data transmission for a part of such software, and a telecommunication system are disclosed. It is done. As described herein, a telecommunications system may include two or more terminals, an LA-cell, and an SA-cell.

  Hereinafter, embodiments of the present invention will be described in more detail. It is understood that these embodiments are not to be construed as limiting the scope of protection of the present invention.

It is the schematic of the system information distribution in the conventional network. FIG. 1 is a schematic diagram of the continuous transmission of system information according to the prior art. FIG. 1 is a schematic diagram of an SA-cell, LA-cell in an energy efficient cellular radio access communication network. FIG. 5 is a schematic diagram of intermittent periodic transmission of system information according to an embodiment of the present invention. FIG. 7 is a schematic diagram of triggered transmission of system information in accordance with various embodiments of the present invention. FIG. 1 is a schematic diagram of an energy efficient communication system according to an embodiment of the present invention. FIG. 1 is a schematic view of the coverage area of multiple LA-cells and multiple SA-cells in a communication network, according to one embodiment of the present invention. FIG. 5 is a schematic diagram of an SA-cell wireless communication interface and a LA-cell wireless communication interface of a terminal alternatively enabled in time multiplexing mode according to an embodiment of the present invention. FIG. 6 is a schematic diagram of SA-Cell and LA-Cell providing SA-Cell system information and LA-Cell system information to a terminal according to an embodiment of the present invention. According to one embodiment of the present invention, a four-step process for obtaining system information on one or more SA-cells and obtaining system information on system information on one or more LA-cells FIG. FIG. 1 is a schematic view of an LA-cell providing both terminal LA cell system information and SA-cell system information according to an embodiment of the present invention; FIG. 5 is a schematic view of an LA-cell providing both LA-cell system information and SA-cell system information to a terminal according to another embodiment of the present invention. FIG. 1 is a schematic diagram of an SA-cell providing both SA-cell system information and LA-cell system information to a terminal according to an embodiment of the present invention; as well as, FIG. 5 is a schematic diagram of an SA-cell providing both SA-cell system information and LA-cell system information to a terminal according to another embodiment of the present invention.

Examples # 1-4 provide various methods and systems for distributing the following system information. Example 1 will be described with reference to a conventional network as shown in FIG. 1, while Example # 2-4 is specifically adapted to split delivery of system information within an energy efficient network. It is described as being However, those skilled in the art will understand that the system information by SA-cell or LA-cell in the energy efficient network as provided in Example # 1 is related to the delivery of system information by cells in the conventional network. It will be understood that the techniques applicable to the delivery of

Example # 1: Distribution of System Information According to Various Embodiments of the Invention Example # 1 is mainly intended to focus on the possibility of improving the efficiency (including energy efficiency) of distributing system information by cells. There is. As mentioned above, Example # 1 can be described with reference to the conventional network as shown in FIG. 1, but several cells can be applied to deliver system information, eg The present invention can be applied not only to conventional cells such as a transmitting base station, Node B or improved Node B, but also to SA-cells and / or LA-cells in an efficient network.

  Example # 1 provides five different ways to improve the energy efficiency of split distribution of system information by cell. In the first method, as in the prior art, system information is transmitted every divided time, rather than continuous transmission as usual, and any system information is still transmitted as divided time. It is based on (or not sending enough system information). The second method is based on transmitting system information when instructed by a particular event to trigger. The third method is based on transmitting system information with reduced power, in terms of loss of the transmission path, the outer edge of the cell's coverage area, rather than transmitting at full power to ensure that it gets far. . The fourth method is based on transmitting only reduced and fragmented system information than using for regular periodic transmission of the system information part. The fifth method uses the normal transmission channel, rather than transmitting system information to all the terminals that may possibly be in the coverage area of the cell, but only to a specific terminal via a dedicated channel. Based on sending information. These five different methods will be described in more detail.

1. Transmission of periodic system information (for each split hour only) The first way to achieve more efficient energy delivery of system information is periodically, ie, only during the split time For example, it relates to a cell such as cell 1 shown in FIG. 1 that transmits system information. For example, the cell may be configured to transmit a system information signal in 100 milliseconds (MS), which corresponds to 1/10, followed by 900 milliseconds without transmitting any system information. To that end, the cell may include at least a transmitter and / or a controller to prepare the signal for transmission. The cell may further include a memory for storing a computer program related to the controller, or a transmitter configured to process data as the CPU processes data and operates in the same manner as the program operates on the program.

  The duration of transmission of the system information signal may correspond to a full cycle of system information of the cell, or to a specific part of the system information. FIG. 4 illustrates a full cycle of system information 10a of a cell including transmission blocks M, S1, S2, S3 and S4 in a period between a duration t1 and a duration t2 adjacent to the non-transmitted t1 of system information 10b. , Signal 10 is shown schematically. The cell then repeatedly transmits the signal 10, thus repeating the system information block M corresponding to 10a, repeatedly between the duration t1 and the duration t2 adjacent to the untransmitted t1 of the system information 10b, Transmitting S1-S4 is indicated by signal 11. As shown in signal 12 when blocks S5 and S6 are present instead of system information blocks S3 and S4, some of the system information may be replaced by other parts.

  The duration of transmission of the system information signal may be short, for example, to correspond to only a portion of the system information (or system information portion) cycle. As signal 13 in FIG. 4 shows, transmission of a full cycle of system information or part of system information may be distributed over multiple periods of transmitting and not transmitting system information signals, to the terminal. The time increment may need to obtain full system information (or a portion of system information) as compared to the case of substantially continuous transmission of system information.

  The transmission time of the system information signal may be longer than the entire cycle of the system information or a part of the system information. For example, this may be a period corresponding to twice the period of system information or a part of system information. In another example, in addition to the duration corresponding to part of system information or full cycle system information of a single cell, for example, information to be repeatedly transmitted is part of system information or part of system information. It is therefore desirable to transmit more reliably, as it is the case that cells are considered more important than other information, or that they allow extensions to be estimated to be more urgent. It fails to receive the system information element, or the terminal detects or suspect detection, ie within the same period that the system information was received and the system information was sent, the terminal added period In the case of transmitting system information in a manner that can obtain or repeatedly reconfirm system information elements.

  Changing the cycle efficiency (i.e. the ratio of "on" and the ratio between "on" and "off" time to transmit system information or part of system information), in this method transmission time of system information It can be seen that the emission power of the transmitted signal for approximately the same split time is reduced, in contrast to the conventional approach where substantially 100%. In one embodiment, the maximum cycle efficiency of the periodic system information, or a portion of the system information signal, is the same continuously emitted by the cell, eg, 1/2 or 1/8 emitted. This can lead to power savings of 2x and 8x, respectively, compared to the signal. In another cycle efficiency, for example, the terminal may be applied to the transmission of another system information part according to the need for information (estimated or expected) and urgently required.

The following example may be this description. In the current system, when the terminal is powered on, the terminal initiates a cell search procedure to search for a suitable cell to camp on. As part of such a procedure, the terminal identifies one or more candidate cells, and then, for example, the network (public land communication network) is associated with the cell ID for the cell and / or the operating state of the cell (for example, Currently, it may be necessary to determine for a particular candidate cell, such as whether the terminal's access is prohibited and / or there is a possibility of overload. As is common in prior art systems, continuous or very frequent transmission of system information may be tailored to the needs of such terminals. However, such transmissions are not energy efficient if, for a certain period of time, there are terminals that have not yet been powered on and / or do not perform cell search procedures on specific cells. According to an embodiment of the present invention, energy efficiency is improved by transmitting an intended system information portion for a terminal performing a cell search procedure, for example, only once every second and only at divided times. . A terminal attempting to receive a portion of specific system information may actually need to wait for a while until it can be received. In this example, in the worst case, the latency will be 1 second, but on average the latency will be 1/2 second. Because of latency considerations, the upper bound of this transmission is not bounded by the upper bound of latency, or rather, during continuous transmission of the system information portion so as to withstand unanticipated latency, rather than the upper bound in time. is there. High-end transmission may, for example, make a different choice for part of another system information, if latency of part of the specific system information is tolerated than in the case of part of other system information. You may The upper transmission of some of the system information including the handover parameters of the cell, for example, the terminal performing the handover to the new cell needs very little information about the handover parameters of the cell immediately The terminal that initiates contact with the selected cell via its RACH is the RACH (Random Access Channel) parameter of the cell, which motivates the need for RACH parameters before handover is possible. You may choose higher than that.

  In an embodiment, the continuous transmission of part of the system information, or the upper bound period therebetween, may change over time. For example, during a peak time of 0.25 seconds (s) where people switch their cell phone to power saving in the morning, of the system information of the terminal normally used to perform the power-on procedure It may be selected for some upper limit transmissions. For example, a high value such as 1 second may be selected if it is expected that most terminals will be powered on during the day. During the night, for example, higher values such as 5 seconds may continue to be selected. At this time, even a high value beyond what the terminal can normally withstand can be regarded as acceptable from the viewpoint of achieving energy saving.

  In particular, when periodic transmission of the system information part is performed, for example every second, it synchronizes with those transmissions of certain system information parts so that transmissions with neighboring cells do not overlap. Is preferred. For example, assuming transmission of a portion of system information, cell A has 1.0, 2.0, 3.0,. . . , Etc., transmit its system information in equal seconds, neighbor cells B, 1.1, 2.1, 3.1,. . . , Etc., and its neighbor cell C transmits 1.4, 2.4, 3.4,. . . The system information may be transmitted in equal seconds, and is considered to take less than 100 milliseconds. By doing so, the terminal performs a cell search procedure almost simultaneously with a plurality of candidate cells (such as cells A, B, and C) without dividing them for each candidate cell and requiring an average or maximum waiting time. It will be possible to For example, in the above figures, part of the system information transmission time is not "slightly staggered side by side" transmission, but part of the system information of up to 10 cells that can be received in a time frame of about one second is , In the worst case, on the order of 10 seconds (ie, 10 seconds of 1 second worst case delay) or on average 5 seconds (ie, 0.5 seconds of 10 seconds average delay) There is. Specifically, cells configured in the same public cellular telephone network or in a co-operating public cellular telephone network can be expected to benefit from that approach.

2. Transmitting System Information Triggered by Several Events, Multiple Events, or Combined Events When a terminal powers up and acquires system information for a particular cell, network, in particular, the cell is usually a terminal Not aware of the need for In other cases, the network and / or cell may recognize and / or predict, or expect the need of the terminal and / or recognize the need of the terminal for a particular system information part May be Thus, in various embodiments, the trigger for transmitting a portion of system information may include an implicit or explicit trigger.

Implicit trigger to send part of system information
For example, if the terminal establishes a data connection via the cell (the normal cell in which the terminal was camped on), the network, and the specific cell involved in the data connection, the terminal may receive one of the additional system information. You may expect to need a department. For example, the terminal may use the criteria to make measurements with other cells (for example, when the terminal is in the mobile station situation it is called an "event", which predetermines the signal level of the serving cell and To report below the threshold value and / or to cause the signal level of the neighboring cell to exceed the signal level of the serving cell by a predetermined tolerance which is either positive or negative of a predetermined tolerance You may need parameters to specify the criteria of. In that case, the cell may transmit part of this system information, for example after setting up a brief data connection via the cell. Doing so will result in significant energy savings as compared to the normal case of repeatedly sending part of this system information.

  In a further aspect, the cell has a short time when the first trigger was received (e.g. the data connection setup is complete via the cell) and part of the relevant system information (i.e. possibly needed by the terminal) A delay between transmissions of part of the system information may be applied, for example 10 seconds. Within the delay period, other terminals that have established data connections via the same cell (each of which may be interpreted as a trigger) also mitigate the cell from sending the same information multiple times in this way, Part of the same system information can be received.

  Preferably, the delay value should generally not exceed a predetermined threshold, which corresponds to the maximum latency considered to be acceptable to the terminal, for example 15 seconds. Thus, when multiple terminals establish data connection setup within the delay period, it is sufficient to notify these terminals of a single transmission of the system information part.

  Those skilled in the art will appreciate that other triggers may be associated with some of the system information (e.g. setting up one or more additional data connections) where it can be expected within the delay time, e.g. peak time. As long as you will recognize that it is useful. However, the delay is preferably set to a small value, or zero, if the rate of triggering (e.g. setting of the data connection) is low, e.g. less than or equal to the delay time per setting of one data connection.

  As described in more detail below, delayed transmission of triggered system information portions may be combined with low power transmission options. Next, the reduced power settings should match the farthest in terms of path loss, the terminals in the terminal group that have completed setting up the data connection within a specific delay period.

  Another example is that a cell is configured with a plurality of RACH channels and is a general RACH channel (ie, all cells in a network configured with a predetermined RACH channel, or at least a plurality of cells in an area) A cell is configured for each of one or more RACH channels. Next, a terminal that has not (still) received the RACH channel configuration for a particular cell may indicate its initial request via the cell's general RACH channel. The request may be handled by the cell or discarded depending on system configuration and cell load. The cell that has received the RACH request specific to the RACH channel may consider such an event as a trigger to transmit the system information part related to the setting of the RACH channel, or from the terminal that transmitted the request. The request may be sent on a configured RACH channel per cell, as in This applies not only to the particular terminal that sent the request, but (still) other terminals in the cell that have not issued such a request are sent as a result of the RACH request of this particular terminal. A part of the RACH configuration system information of the target cell may be received.

  It may be noted that in this case there may be no significant benefit from applying the delay as described above, and there may be no significant benefit from applying the power saving option. The substantially full-power, RACH-free, delay-free transmission can then perform monitoring of multiple terminals on the system information channel of the cell in a single transmission. Applying the power saving option may depend, for example, on the estimated or predicted number of terminals in the coverage area to apply the power saving option at off-peak time without applying the power saving option at peak time .

Explicit Trigger to Send a Part of System Information According to one embodiment of the present invention, the terminal, which itself finds the need for some of the specific system information, moves towards the cell, to the system A request for an information part may be issued. Such requests may be designed for special purposes if not found in a conventional network. Such a request may be implemented, for example, to be similar to a RACH request. In a further embodiment, the request for the system information part is to allow the terminal to conveniently specify which part of the system information or, in some cases, which part of the system information the terminal requests. I will. In response to receiving such an explicit request, the cell receives the requested system information portion in response to receipt of such an explicit request, which is also received by the requesting terminal, possibly also by other terminals, and the additional terminal monitors the system information channel of the cell. It may be configured to transmit.

  In embodiments, the cell may also interpret the explicit request as an implicit further request, and send additional system information parts not specified in the explicit request. This may be an example, if, for example, the cell is expecting based on experience, such additional system information parts normally and / or subsequently required. Such an embodiment is particularly advantageous if the explicit system information part request does not admit that multiple system information parts are required.

  In this case, it should be noted that there may be no benefit from applying the delay as described above, and there may be cases where there is no benefit from applying the power saving option. Without delay, the transmission of a portion or parts of the substantially full power requested system information is then provided by the cell's system information channel for single transmission and monitoring of multiple terminals. May be When applying the power saving option, for example, the cell can be set to apply the power saving option at off-peak time, and the power saving option at peak time can not be applied, and estimation or prediction of terminals in the service area is performed. Depending on the number.

  FIG. 5 provides an exemplary diagram illustrating the concept of transmitting system information, either implicitly or explicitly, in response to a trigger. The cell may be configured such that, for example, the signal 20 shown in FIG. 5 transmits repetitive signals, a system including M, S 1 and S 2 similar to these blocks shown in FIG. The information block may follow at time t2 when no system information is sent yet. FIG. 5 shows the repeated transmission of signal 20 with signal 21. In addition, as described above, the cell may receive a trigger as an implicit or explicit trigger to transmit the system information block S3, and (at least) in response to the trigger. The received block S3 may be transmitted by the requested terminal. This is “tr (S3) −1” as the first trigger and “tr (S3) −2” as the second trigger that two different triggers with the signal 22 occurred for the system information S3. , And schematically shown in FIG. Also, the cell may be configured to apply a predetermined delay time TD, which has been determined in advance, after receiving the trigger, before transmitting the requested information. This is applied after the first trigger has occurred, and the signal 23 with the delay period TD is shown in FIG. 5 as "tr (S3) -1". As shown in FIG. 5, after that, during the delay time TD, three other triggers of the system information block S3 are received by the cell, but the cell already transmits the system information block S3 at the expiration of the delay period TD. The cell does not need to perform these triggers, as we plan to do. FIG. 5 shows that S3 is transmitted when the delay period TD has expired. Thereafter, another trigger for the system information block S3 may be received as indicated as the fifth trigger "tr (S3) -5". Configured to apply a predetermined delay time TD determined in advance before transmitting the requested block S3 again (the second transmission of the requested block S3 not shown in FIG. 5) It is also good.

3. The transmission power of the signaling sent from the low power system information transmission cell is usually the farthest from the point of path loss so that the farthest terminal can make the communicated information the most reliable even at the cell edge It is selected to be able to receive reliably. According to an embodiment of the present invention, in order to save energy, in view of path loss, the cells are arranged in such a way that the system information portion is intentionally less apart than at the far end of the cell. In estimating the terminals, the cell may choose to transmit some system information or system information parts, for example, at low power. The power used to transmit the system information portion from the cell to a particular terminal may be, for example, from the setting of the power used by the cell, usually for a dedicated channel, for communication with the terminal, The type of channel of the cell may be estimated, which controls the transmission power from sufficient reception by the terminal. Increasing the transmission probability of the system information on the common channel of the cell to transmit part of the system information to the terminal via the common channel is a higher power setting for transmitting to the terminal via the dedicated channel You may choose to apply That is, in most cases, they can be received and obtained in a single transmission that does not require retransmission of their system information (s) or portions thereof.

  If a dedicated channel is not established between the cell and the terminal, the cell may estimate transmission power suitable for transmission of system information from the RACH request received from the terminal via the common channel. Such a RACH request may include a power indication of the terminal that sent the RACH request. The cell that measures the power that has received the RACH request can then determine the path loss due to the RACH request obtained from the difference between the transmit power of the terminal and the received power of the cell. The cell uses this information and the fact that the path loss in the uplink and downlink directions is usually the same as estimating the appropriate transmit power to transmit system information to the terminal via the common channel. It may be configured to use.

  Yet another method of estimating the appropriate transmit power for transmitting system information from the cell to the terminal may be based on the power at which the terminal received some signal from the cell. Such measurements may be determined by the terminal, eg, by cell reselection and / or handover in context. In the context of handover, such information is usually provided to the network, and the network is thus associated with the cell expected to transmit system information to the terminal, possibly via another cell. May provide some of the information to Otherwise, the terminal may provide measurement information directly to the cell.

  When the cell simultaneously transmits system information or part of its multiple terminals, the application of power reduction is determined by the farthest distance between these multiple terminals in terms of the path loss of the terminals. May be

4. System information or partial division transmission of system information (for example, only signals)
When the terminal is performing handover from one cell to a new cell, for example, the terminal needs to notify of the neighbor list of the new cell. Normally, each cell transmits its neighbor cell list. However, transmitting the full neighbor cell list to the terminal where the old cell and the new cell are handed over may share some adjacent cells, since the overlapping information is included. According to one embodiment of the present invention, instead of transmitting the full neighbor cell list, the cell (either a new cell or an old cell) transmits the only difference or signal between the two lists. It may be enough. A signal such as that transmitted by a new cell has information indicating that it is necessary to delete the old cell ID 11, ID 12, etc. or add the new cell ID 21, ID 22, etc., for example. It may be included. The signal lists of multiple terminals may be combined in a single transmission. This refers, for example, to the cell ID not included in the neighbor cell list of the terminal, the terminal ignores the delete instruction, and refers to the cell ID already existing in the neighbor cell list of the terminal, and adds the additional instruction. By ignoring, it may be performed if handover is made to a new cell from another old cell.

  New cells are targeted by cells to monitor the old cells for which these handovers have taken place, or to select a transmission strategy for system information that is estimated to be the most recyclable. May be configured to monitor the speed of the handover.

  This approach can also be applied quite often to many other parameters delivered through the system, such as handover parameter settings that have the same value in many cells in the network. For example, if a handover is configured from an old cell to a new cell, and at least some of the specific parameters have the same value for both cells (e.g., the configuration of the handover), then the new cell is those specific parameters. You may withhold to send to that system information. In other words, the difference (signal) between the old cell and the new cell in these particular parameters (parameter values) is zero. In other cases, for example, if a handover is performed from another old cell to a new cell, and some specific parameters in the new cell (eg, handover settings) differ from the old cell, the new At least for the terminal that may obtain and apply parameters associated with these new cells (eg, replace the old parameter values or add new parameters by the new parameter values), It may be sent within the system information.

5. Transmission of System Information via Dedicated Channel A fifth method for improving energy efficiency of distributing system information is to use a normal transmission channel to transmit system information, or a portion thereof, within the coverage area of a cell. Rather than transmitting system information to all existing terminals, it involves transmitting only to specific terminals via dedicated channels.

  In this solution, it may not be applied, or may not be practical for a part or all system information elements of all system information. For example, it does not apply to some of the specific system information needed to request or for which dedicated channels are configured. Also, in general, it may not be practical for a part of system information used for cell search or a system information element. And, instead of using the additional (energy) overhead of setting up a dedicated channel (both terminal and network), communication, or common channel only for the purpose of receiving part of the system information, By using a dedicated channel, the burden may be greater than the load achieved

  However, when communication or delivery of this system information via a common channel is not available to the terminals prior to transmission of the system information, the plurality of terminals receive the system information or part of the system information If it does, it may be efficient. For example, notifying 10 terminals simultaneously with transmission of single system information is more efficient than notifying a single terminal. However, for such transmissions, usually high transmit power is used to be sure that the intended terminal can be reached farthest in terms of path loss. If a small number of terminals are receiving and acquiring the transmitted information, the energy efficiency of such transmission is suspect. If a single terminal is receiving and obtaining the transmitted information, that information is provided in an energy-inefficient manner. If there is no terminal to receive, and such transmitted information is acquired, energy is wasted.

  Also, with small cell size trends such as macro cells to micro cells, pico cells, or femto cells, multiple terminals are less likely to benefit from some of the same system information being communicated or transmitted over a common channel. It becomes easy to become.

Thus, according to one embodiment of the present invention, a cell may be configured to transmit at least some system information parts from the cell to a particular terminal via a dedicated channel. Since the dedicated channel is usually power controlled, the transmission of a certain amount of data to a single terminal via the dedicated channel seems to be more energy efficient. Also, a dedicated channel is usually a cell-to-terminal such that a portion of some system information or erroneous reception of a system information element can be corrected quickly, efficiently by the retransmission requested by the terminal. Operating in both downward and upward directions from the terminal to the cell. In addition, using dedicated channels that are very well-matched to terminals that trigger cells may, for example, transmit their system information, or parts thereof, with explicit triggers, as described above. Depending on the request from the terminal, including the use of the "difference only" or "signal" option, it actually requires the transmission of only part of the system information or only the system information element.

In various implementations, all of the above five power saving option combinations can be applied equally well and as others can be more easily combined. For example, using a dedicated channel for transmission of system information to the terminal (option # 5 above) may very well be combined with the transmission of only signals (option # 4 above), and / Or, it may be combined with transmission of an implicit and / or explicit trigger signal (option # 2 above). Also, those used for implicit and / or explicit triggers (option # 2 above) may be used very well in combination with intermittent transmission (option # 1 above), in particular It may be used in combination with selected portions of system information at a very low repetition rate (ie t2 much greater than t1). In contrast, using intermittent transmission (option # 1 above), the use of a dedicated channel for transmission of system information to the terminal (option # 5 above) may not be very applicable, saving power The combination with (Option # 3 above) may already be implied in the use of dedicated channels.

Change or replay system information (demonstrate)
The special case of delivery of system information includes the specific system information portion of cell update (i.e. change). The modified system information part should receive the "previous old" system information and be delivered to at least those terminals remaining in the coverage area of the cell. This may be performed most efficiently at the communication of the system information part changed at least once.

  The modification of the system information may be performed most efficiently, as in the conventional system, preferably via the communication or common channel, with the power settings for the farthest terminals. Notification of system information may be provided via a paging channel, such as UMTS or MIB, which needs to be continuously monitored at the neighbor.

  The same mechanism of system information change may be applied instead of the current usual mechanism of system information lifetime at each terminal. According to an embodiment of the present invention, the cell may be configured to maintain a refresh timer instead of the operation of the terminal at the valid time. When the cell's refresh timer expires, the cell is configured to announce, for example, a refresh as well as a change in system information, and can communicate the full set of system information at least once, within the current coverage area. A portion of the existing system information may be confirmed and additionally complemented so that all terminals can be updated, and a portion of the system information may still be missing and stored.

Example # 2-4: General System Description
Example # 2-4 has been described in the communication system 30 shown in FIG. As shown in FIG. 6, according to one embodiment of the present invention, preferably the communication system 30 of the cellular radio access communication system comprises at least LA-32 cells, SA-33 cells and 34. The user terminal 35 is shown in FIG. For the sake of clarity, only the most relevant elements of the communication system are shown in FIG. Other elements not shown in FIG. 6 may be present or within the scope of the present invention. Such "other elements" are, for example, additional SA cells, additional LA-cells, additional terminals, further elements of the communication system, and relays connecting each cell and / or each other in the communication system. Similar to the line, it may include another network node such as, for example, a management unit.

  In the following, a general description of each of the LA-cell 32, SA cells 33, 34 and terminal 35 is provided. A functional detailed description of each of these elements follows the general description and is provided in the discussion of the alternative solution.

  The LA-cell 32 is configured to camp on the terminal 35 on the LA-cell 32 and configured to be able to call the terminal 35 at least in a conventional manner known in the art. It is. According to some embodiments of the present invention, LA-cell 32, which is also configured to receive a service request message from terminal 35 indicating data connection, is shown in FIG. It needs to be established with one of the SA-cells to support no wireless communication data volume (i.e. wireless exchange of user data). The LA-cell 32 is not primarily intended to be used for wireless communication of user data from the terminal 35 to the terminal 35, but is communicated via paging or the LA-cell 32, full or It does not prevent other signaling, such as some user data traffic, for data connections (calls) within some duration, for example, for low bit rate (such as voice calls) traffic .

  Compared to the SA-cells 33 and 34, the LA-cell 32 is usually configured to cover a large geographical area with a smaller bit rate. The geographical area in which the terminal in standby selects to camp on the LA-cell is called the coverage area of the LA-cell. In a properly sized cell, terminals in that area can normally successfully receive system information and signaling messages (eg, paging messages) from the LA-cell. This is of course assumed to apply in the reverse direction, ie the terminal camps on the LA-cell and sends a signaling message (eg service request message) to the LA-cell it is camped on When doing so, the LA-cell can normally receive the message successfully. In the intended coverage area of the wireless communication network (FIG. 6, LA-cell 32), at least one full-action or "normally on" LA-cell may be assumed, and terminals and signaling messages It may be assumed that it is possible to support the exchange of In the simplest embodiment, this may mean that the LA-cell 32 is always full function ("on"). In other embodiments, it means that the LA-cell 32 is not always always in the "on" state, and a power saving option suitable for the LA-cell may be applied to the LA-cell 32.

  The terminal 35 is not only a terminal operated by a human being who is actually a user, such as a voice call or a mobile phone browsing the Internet, but also a smartphone or a data-centric terminal (eg laptop or tablet) human And may be an MTC (machine type communication) device, such as a smart electricity meter, a car navigation device, or a surveillance camera device.

The terminal 35 may be in an execution mode or a standby mode. As used herein, terminal 35 is said to be in a standby mode because it does not provide support for wireless exchange of user data or traffic between terminal 35 and SA-cell 33 or 34. ing. As used herein, terminal 35 is said to be in run mode if it is capable of exchanging data with at least one of SA-cells 33,34. It should be noted that while these concepts of standby mode and execution mode may be consistent in terms of standardized conventional network terminology as they are used herein, they are not necessarily such standardized. It should be noted that it does not exactly match the definition given.

  In addition, the terminal 35 supports several forms of power saving options (ie power saving mode, or an operating mode that consumes less power in the power saving mode than the operating mode of the terminal) It is also good. The distinction between the power saving mode and the operation mode is consumed by the terminal, while the distinction between the standby mode and the execution mode is based on the presence of support of wireless data exchange of user data with the SA-cell. The terminal may be, for example, a terminal that is in the operating mode but is still in standby (or a terminal in the operating mode may be in the running mode), since it is based on a certain amount of power. Similarly, a terminal in power saving mode may be either in the active or standby state, depending on whether the terminal supports wireless exchange of user data with at least one of the SA-cells. However, the most common thing is that after a terminal in "power up" (i.e. exit power saving mode and enter operating mode) standby state in "power saving mode" (and in operation) There will be situations where certain actions are taken to facilitate establishment of a data connection with at least one SA-cell. Since the handling of the embodiment of the present invention relates to the terminal accompanied by the distribution of system information, the following description mainly describes the distribution performed between the standby mode and the execution mode of the terminal.

  The terminal 35 in standby mode may be assumed to "camp on" at least on the LA-cell 32, which may also be implemented in a conventional manner. For example, the LA-cell communicates using information contained in the received signal to select or reselect a pilot signal, or a beacon signal that can be received by the terminal 35, and then the LA-cell to camp on You may In FIG. 6, the signal transmitted by LA-cell 32 and the signal received by terminal 35 are shown as solid arrows from LA-cell 32 to terminal 35. In an embodiment, terminal 35 may be able to notify the network of location / routing area changes to facilitate paging functionality not shown in FIG. 6 of LA-cell 32.

  The SA-cells 33 and 34 are mainly intended to transmit user data traffic from the terminal 35 to the terminal 35 via a dedicated channel, for example via a data connection established for that purpose. . However, it is also not excluded that some other information and / or some signals are performed via one or more SA-cells.

  In contrast to LA-cell 32, each of SA-cells 33 and 34 is typically configured to cover a smaller area at a higher bit rate. In normal scenario deployment, considerable overlap may be displayed in the area that can probably be covered by adjacent SA-cells. In the intended coverage area of the wireless communication network, it may be assumed that at least one of the SA-cells 33, 34 can provide a cover. The SA-cell either only operates fully when it is in the required state, in other words it is in the "normally off" state. The SA-cell is intended to support at least one form of power saving, eg power saving mode or standby mode. As a result, in the exemplary embodiment of FIG. 6, while the SA-cell 34 is in the run mode (shown as black triangles in FIG. 6) in the SA-cell, the SA-cell is in a power saving mode. Are shown as SA-cells 33 (shown in FIG. 6 as white triangles). As shown in FIG. 6, the signals effectively transmitted by the SA-cell 33 in the power saving mode and the signals received by the terminal 35 are indicated by the dashed arrows, while the SA-cell 34 in the run mode is shown. , And the signals received by terminal 35 are shown as solid arrows.

Each of the terminal 35, the LA-cell 32, and the SA-cell 33, 34 may also include at least one or more communication interfaces for transmitted and received information, a memory unit for stored data (possibly received over the communication interface). A processor, communication interface, processor, memory unit that processes data and program execution may be configured to perform the functions of these units described herein, as appropriate.

  Because of the different energy efficient network situation from the conventional cellular system, the terminal must, according to various embodiments of the invention, communicate with both the LA-cell and the SA-cell, at least In three alternative arrangements, it is assumed that for the terminal 35, the signal received from the terminal 35 is transmitted to any cell of such a cell type.

  The first configuration for terminal 35 is the LA-cell radio interface for communicating with LA-cell 32 (possibly not another LA-cell not shown in FIG. 6), and SA-cells 33, 34 (FIG. 6). Not assume that the terminal in running mode for supporting two radio interfaces simultaneously, such as SA-cell radio interface for communicating with another SA-cell (not shown) As ", it is mentioned below. As those skilled in the art will appreciate, this configuration involves a slightly more complicated configuration than a terminal via only a single radio interface. In at least some solutions, such a terminal needs only the LA-cell radio receiver, and the terminal can receive information from the LA-cell via the LA-cell radio interface, but the terminal Not only does it need to have the functionality, it does not have to send information to the LA-cell. In other solutions (e.g. regarding the exchange of signaling information with the LA-cell), such a terminal also requires a LA-cell radio transmitter, so that the terminal transmits information to the LA-cell. Will be able to Since the exchange of signaling information with the LA-cell only requires a low bit rate, maintaining the LA-cell radio interface may reduce the additional complexity, cost and energy consumption. Terminal 35 in configuration (i) may be in run mode and may receive signaling and / or data exchange from LA-cell 32 at any time.

The second configuration for terminal 35 is such as LA-cell radio interface for LA-cell (s) and SA-cell radio interface for SA-cell (s), ie It is referred to below as "configuration (ii)", which assumes a terminal in run mode that supports two radio interfaces by rapidly changing the mode of operation to operate in time division mode. In other words, such a terminal will at some point activate the LA-cell radio interface and at another moment activate the SA-cell radio interface. It is assumed that the terminal 35 in configuration (ii) is in run mode and when actually exchanging data with the SA-cell 34, the SA-cell radio interface is enabled for most of the time Ru. It is further preferable to assume that data exchange with the SA-cell 34 is interrupted for only a short time, being time-divided into less than one second, eg 100 ms, so that the interruption to the terminal user is not exacerbated . The terminal in configuration (ii) may be in run mode, reconfigure the radio interface from the SA-cell radio interface to the LA-cell radio interface, and then at any time, but to the SA-cell radio interface The signal may be received from and / or data exchanged with the LA-cell for a relatively short (e.g., 100 milliseconds) time before restoring the configuration. In this manner, similar simultaneous mode operation may be achieved. In an embodiment, the operation of the terminal reconfigures the radio interface to the LA-cell and the SA-cell and transmits user data to the terminal (and / or transmits system information to the terminal and possibly also to other terminals) ) That the terminal configures the radio interface with the data it receives from the LA-cell, the SA-cell does not transmit user data to the particular terminal (and / or this particular terminal, possibly other terminals (Sending system information) may be synchronized to one of the other SA-cell ranges. Such an embodiment can avoid that the SA-cell wastefully sends user data to the terminal and also wastes SA-cell resources. Also, the generation of the terminals that make up the LA-cell radio interface (and additionally, the SA-cell radio interface can not be used) need not be very frequent, and the LA-cell radio interface effectively The total time of a terminal that is turned up may include only relatively small time in divided time.

  A valid third configuration for terminal 35 is that two radio interfaces (one for the LA-cell and one for the SA-cell) support alternately, but are described in configuration (ii) Assuming a terminal of execution, such as a mode of operation without rapid alternation (continuous), it is referred to below as "configuration (iii)". For example, similar simultaneous mode of operation as described in configuration (ii) is not considered necessary and / or, for example, reconfiguration of the radio interface considers one second or more as "rapid" If you need more time, that means is not used because it does not support rapid configuration. A terminal in the form of configuration (iii) shall be configured for the SA-cell while its wireless interface exchanges user data with the SA-cell. This allows the exchange of user data to occur at the maximum speed possible without the need for short interruptions as for configuration (ii). As a result, according to configuration (iii), even when the data connection of the active terminal is established, it may not be possible to confirm whether it is within the coverage area of the same LA-cell. Even if terminals in the active state remain in the coverage area of the same LA-cell, the change of system information of the LA-cell may not be noted. Therefore, the terminal may perform a cell search procedure after completing its data exchange via SA-cell and reconfiguring the radio interface to the LA-cell, and need to obtain LA-cell system information There may be. Before the cell search procedure and the acquisition of sufficient system information are complete, various approaches known to the person skilled in the art to repair, for example, to avoid missing calls such as incoming calls and ringing messages, or May be continued to at least alleviate this problem.

  According to configurations (i), (ii) and (iii), the LA-cell radio interface and the SA-cell radio interface may split radio frequency back and forth or physically the same radio interface (e.g. The cell and the SA-cell may be two physically separated radio interfaces sharing (if operating in the same frequency band but operating on different carriers). In the latter case, the "SA-cell radio interface" and the "LA-cell radio interface" physically differ only in the configuration of the "soft" radio interface. The single physical radio interface for configurations (ii) and (iii) is enabled as a LA-cell radio interface (while the SA-cell radio interface is disabled) or (LA-cell radio There is sufficient ability either to be enabled as a SA-cell radio interface while the interface is disabled.

As used herein, the term "valid" in reference to a cell type (SA-cell, LA-cell) refers to a cell in the context of an enabled or disabled SA-cell or LA-cell radio interface. From type, to describe the interface that can receive the signal, and exchange data with the cell type (which may include any type of data such as user data, signal data, network control messages etc) While being used to support, the term "invalid" is used to describe that the interface can not receive the signal from the cell type and can not support exchange with the cell type It is done. One skilled in the art will recognize that there are various ways in which the interface may be "disabled". For example, in one extreme embodiment, an invalidated wireless interface can turn off the wireless interface completely without powering it from the electrical related components of the interface. However, in another extreme embodiment, the radio interface may be considered to be "invalid" when it is simply not in use despite the fact that the interface itself is fully operational. Because there is no time required to re-enable the interface during which it is minimal or because it takes a minimum delay to prepare for the operation of the disabled interface when it needs to be re-enabled, The latter embodiment would be advantageous. Whether these extreme embodiments are known to the person skilled in the art or within the scope of the present invention, it is taken into account what radio interface in various other embodiments is nullified. right.

  FIG. 7 is a schematic view of the coverage area of the LA-cell and multiple SA-cells in the communication network, according to one embodiment of the present invention. The LA-cell 42, which is the LA-cell 32 shown in FIG. 6, may be shown by dashed circle 43 as shown in FIG. 7 and may have a relatively large coverage area. In FIG. 6, each of the plurality of SA-cells, which are SA-cells 33, 34, are shown as triangles, such as triangle 44, for example. The SA-cell 44 may have another relatively small coverage area, indicated by a dark circle such as circle 45. Further, FIG. 7 shows the terminal 46 in the standby mode and the terminal 47 in the execution mode (terminals in the execution mode indicated by thick frames). Each of the terminals 46 and 47 may be the terminal shown at 35 in FIG. 6 or may be in one or more coverage areas 45. Terminals 46 within the coverage area 43 of the LA-cell 42 are said to be camped on the LA-cell 42. The SA-cell 44 with the cover area 45 attempts to illustrate the SA-cell in the run mode in dark gray while the power saving mode attempts to illustrate the SA-cell in white, one or more terminals A data connection with 47 may be in progress. Of course, in other embodiments, the coverage areas 43 and 45 are not in a circle and need not cover omnidirectional sections around the base station (cell).

  A typical example of the operation of the terminal 35 in an energy efficient network according to an embodiment of the present invention, shown again in FIG. 6, may be as follows. If the terminal 35 does not need to exchange user data using the network (ie, the terminal in the standby state), many of the terminals of the standby state camp on a cell in the conventional network. Camp on LA-cell 32 in a similar manner. If the terminal 35 needs to exchange user data with the network (i.e. needs to enter into the run mode), a suitable SA-cell in the network, such as the SA-cell 34 illustrated in FIG. Establish a data connection with For maximum energy efficiency, the appropriate SA-cell may be turned off in advance (ie switched off or enter an energy saving state), or activated to support data connection (ie It may be necessary to start up. Once the data connection is established, the terminal 35 may exchange (possibly also signal) user data with the / SA-cell 34 via the SA-cell 34, for example via a dedicated channel. If the SA-cell has no traffic (in the case after sending the remaining connection to the SA-cell) or only a small amount of remaining traffic, then for the highest energy efficiency improvement, the SA-cell 34 may cease use thereafter (ie, it may be switched off or may enter an energy saving state). The terminal 35 that camps on the LA-cell and resumes the standby mode may be the same LA-cell (ie LA-cell 32) that it camped on before establishing the data connection, or If the terminal has moved into the coverage area of another LA-cell, it may be another LA-cell.

Example # 2 LA-Cell Delivering LA-Cell System Information, SA-Cell Delivering SA-Cell System Information in a High Energy Efficient Network As Described in FIGS. 6 and 7 and Above 35 is configured to exchange user data with the SA-cell 34 via the data connection established between the terminal 35 and the SA-cell 34, for example for the purpose of via a dedicated channel It is initially assumed to be a terminal of The problem of terminal 35 having obtained SA-cell system information including at least SA-cell 34 and system information on SA-cell 32 is the problem with another SA-cell and another in network 30 that may be associated with terminal 35. Perhaps similar to the system information for the LA-cell is addressed in Example # 2.

  In this example embodiment, the LA-cell 32 transmits system information of its LA-cell, the SA-cell 34 transmits its SA-cell system information, and the terminal 35 in its configuration (ii). It is schematically illustrated in FIG. 8 that the SA-cell radio interface and the LA-cell radio interface are based on the idea of alternately enabling in split multiplexing mode. As shown schematically in FIG. 9, with the SA-cell 34 transmitting its system information via the communication channel 51 illustrated by gray triangles and / or the dedicated channels 52, 53 illustrated by double-headed arrows. The LA-cell and the SA-cell, together with the LA-cell 32 transmitting its system information to the individual terminals 35 via the communication channel 54 illustrated by the dotted triangle, via their respective system information It may be sent. When the terminal 35 is in the standby mode, the terminal 35 transmits LA-cell system information by the LA-cell 32 in which the terminal is camped on via the activated LA-cell radio interface such as the terminal in the standby state. Are configured to receive After that, the SA-cell radio interface may be disabled. The terminal 35 is in run mode, exchanging data with the SA-cell 34 over the actually established data connection for most of the time, and the SA-cell radio interface of the terminal 35 is activated, The LA-cell radio interface is disabled. At that point, terminal 35 may exchange user data with SA-cell 34, as can other signals including system information from SA-cell 34 and terminal 35. A signal containing system information may be received from other SA-cells in the network 30. In its remaining, smaller, portion of time, when the LA-cell radio interface of the performing terminal 35 is activated, the SA-cell radio interface is deactivated. At that point, terminal 35 will probably include system information from LA-cell 32 and from other LA-cells in network 30, as well as supporting signal connection via LA-cell 32. A signal may be received. In this way, in the run mode, a terminal that exchanges data with the SA-cell via the SA-cell radio interface is configured to temporarily suspend or suspend the exchange of user data with the SA-cell. If the LA-cell or terminals expect a LA-cell to transmit system information, such terminal may transmit the LA-cell system information transmitted by one or more LA-cells. It may be received. Such a terminal is configured to receive SA-cell system information from one or more SA-cells when the SA-cell wireless interface is enabled.

  According to the configuration (i) described above, the operation of two simultaneous radio interfaces, so-called "parallel" operation, configured with the terminal 35, follows the various approaches outlined in the example # 1 below. It can be used. The embodiment of Example # 1 can be applied to the delivery of system information received by the terminal 35 by the LA-cell and the SA-cell via the corresponding wireless interface and other independent wireless interfaces. .

  According to one embodiment of the present invention, FIG. 10 shows a flow diagram of four method steps for obtaining system information on system information of one or more SA-cells and one or more LA-cells. It is done. The method steps described in connection with FIG. 6 will be understood by the person skilled in the art in what order and in what order the system is arranged to carry out the method steps within the scope of the present invention. I will.

  The method begins at step 61 where the terminal 35 is in run mode and enables the terminal 35 SA-cell radio interface. Terminal 35 then receives at least a portion of the SA-cell 34 system information for SA-cell 34 from SA-cell 34 via the terminal's SA-cell radio interface (of course, terminal 35: Data may be exchanged with the SA-cell 34). Terminal 35 may receive SA-cell system information from other SA-cells associated with terminal 35. In step 62, in one or more LA time zones for reception, in step 63, receive LA-cell system information via the activated LA-cell radio interface for the LA-cell 32. Meanwhile, the terminal 35 validates its LA-cell radio interface. The terminal 35 according to configuration (ii) and the wireless interface for rapidly replacing two (almost simultaneously) are, for example, divided into a small portion of time, such as 100 ms (or less), LA- Preferably, system information for cell 32 is transmitted. The LA to repeatedly transmit LA-cell system information within a predetermined time, or at least at a predetermined moment when it starts transmitting its system information, for example, with a predetermined period of 100 milliseconds. Preferably, the cell transmits LA-cell system information. The pattern of transmitting the LA-cell system information may be by the LA-cell 32 itself or of any other network part, such as, for example, a network management or OAM (Operation, Management and Maintenance) part, and / or a tuning part. It may be set by either. If an indication is provided to the terminal 35 when the transmission of the LA-cell system information takes place, the terminal of the execution may, for example, immediately before the start, the reception, of the transmission of the system information of the LA-cell is expected. The other LA-cell may measure its signal strength to assess if the radio interface to the cell can be reconfigured and, optionally, it is still within the coverage area of the LA-cell 32. Also perform related operations. Once that is done, the terminal 35 may reconfigure the SA-cell's wireless interface back (and may continue to exchange user data, for example, via the SA-cell 34).

Terminal 35 at optional step 64 may be configured in one or more settings based at least in part on received SA-cell system information and / or received LA-cell system information. Terminal 35 in an embodiment may be configured to store at least a portion of the system information portion of both the SA-cell (s) and the LA-cell (s) for future use. In this regard, the SA-cell system information transmitted by the SA-cell 34 is not limited to being considered exclusively as the SA-cell 34, but it is also possible to use a plurality of, for example, as shown in FIG. It may be noted that it may be considered as one or more other active or awaiting SA-cells, such as the SA-cell 33 adjacent to the SA-cell. The terminal 35, which receives and stores SA-cell system information about another SA-cell, just from the serving SA-cell 34, for example in case of a handover to another adjacent SA-cell, It is considered to be advantageous. Next, the system information, or the part most relevant to the new SA-cell, can be obtained after the handover on behalf of the terminal and already by the terminal before performing the handover. Acquisition of system information on another cell "like avant-garde" performs most system information, handover, rather than facilitating handover to complete more quickly compared to conventional approaches Only after getting done. The ability to perform handovers quickly is typically due to the small cell size, such as SA-cell, and certain mobile cells with relatively short dwell times, such as highly mobile terminals, eg, SA-cell. In the case, especially, with the premiere. The acquisition of system information on another SA-cell, such as "vant-garde" from such a simple serving SA-cell, is particularly energy efficient, the target SA-cell of handover is still waiting In a state (e.g. the SA-cell 33 illustrated in FIG. 6), it is advantageous in networks where it needs to be put into the running state again before it can be full. During re-execution of the SA-cell, the terminal 35 may conveniently use the stored system information of that particular SA-cell to configure the SA-cell itself for handover. It may not yet be possible to fully transmit that SA-cell system information. Likewise, although the system information transmitted by the LA-cell 32 is not limited to being considered exclusively as the LA-cell 32, the above advantages apply to a smaller range of LA-cells, for example It may be considered as one or more other LA-cells in the network (not shown in FIG. 9), such as neighboring LA-cells. A similar advantage of storing system information is that it applies to terminals in a running state that maintain LA-cell system information updates to data and return to standby mode when user data exchange is complete. It is in. For example, when the terminal 35 is in standby again, it is likely that the terminal applies the stored LA-cell system information to configure its settings. In all cases, it is preferable for the terminal to be able to quickly check if the stored system information for a particular cell (SA-cell or LA-cell) is still valid. This may be implemented in a conventional manner, for example by numbering of system information versions. The communicated system information with such version numbering is rather frequently communicated. That is, for system information provided via a dedicated channel, we propose a terminal to send to the cell an indication of the version number of the stored system information, and the cell is still valid or up-to-date After confirming that the version number indicated by the terminal is changed and the version number indicated by the terminal is changed, the latest (i.e. valid) part of these system information parts is provided. There are various ways in which the network 30 may be configured and terminals may obtain system information of SA-cell and LA-cell, "very simple configuration", "more flexible configuration" and " The most flexible configuration is described in detail below.

Very Simple Configuration In a very simple configuration, for example, an SA-cell, such as SA-cell 34, is configured to transmit user data to each of the terminals 35 in the active state, eg, an LA-cell's An LA-cell 32 configured to transmit system information, or, for example, an LA-cell 32 transmitting LA-cell system information for each 100 ms and transmitting user data for another 900 ms. As cell 32, the SA-cell only serves in a period that does not overlap with a predetermined predetermined LA-cell period. In other words, the predetermined period for transmission of LA-cell system information determined in advance is that the terminal receives the system information of the LA-cell, not for receiving user data via the SA-cell, The throughput of the SA-cell for user data is reduced by 90% in this example, as compared to the situation in which the SA-cell is able to transmit 100% of user data, reserved to allow acquisition. Can be achieved. The period during which the SA-cell may transmit user data is currently referred to in this example as the "first period" while the LA-cell transmits its LA-cell system information. The predetermined predetermined period of time, if configured, is noted as the "second period". The first and second time periods are configured not to overlap, but they need not be adjacent time periods (i.e. there may be gaps between these time periods).
They may be applied as any additional tolerance, eg to allow reconfiguration of the radio interface, to allow completion of the radio interface, and to allow any incorrect timing between both cell types.

  Because there may be more SA-cells than a single LA-cell partially overlapping the coverage area of the SA-cell, the SA-cells of the first period are the first of each of the associated LA-cells. It will be required to consider a period of two. In order to avoid further reduction of time division, SA-cell can utilize the first period (and further reduction of throughput can be achieved), and as long as it is possible to overlap, for example, these occur quite simultaneously. The cells are preferably synchronized with one another in a second time period. Using the above example, the second period of every 100 milliseconds would be used by all the LA-cells associated with the SA-cell at the same time.

In this very simple configuration, there are two options for how the SA-cell can transmit its system information. In the first selection, the SA-cell is in a second period (ie, a period in which no user data is transmitted), possibly between gaps in the first and second periods, which are not included in the first period, It may be configured to transmit SA-cell system information. In this alternative scheme, the SA-cell system information may be transmitted at relatively high data rates, and during these periods, the SA-cell thus does not require any transmission resources for user data. Therefore, a large amount of SA-cell system information may be transmitted in a relatively short time. In a second alternative, the SA-cell always transmits system information of the SA-cell, including transmission of SA-cell system information during the first period, during the second period, and / or during the gap. It may be configured to In a further embodiment of the second alternative, during the second period, and possibly between the gaps, the SA-cell system information transmission rate may be, for example, a rate comparable to that of the first alternative. , May be set to a relatively high rate. For both options, the SA-cell is not limited to the period in which it can receive user data from the terminal. That is, the SA-cell may be configured to receive at any time when the terminal can select whether to transmit user data to the SA-cell. If the system is configured to operate in TDD (simultaneous transmission and reception) mode, the time zone allocated for downlink transmission from cell to terminal (possibly predetermined predetermined time slot) and terminal to cell Note that it is common for there to be another time zone assigned for upstream transmission. And, of course, the above configurations must be adapted to the TDD time zone allocated for downlink and uplink transmission, respectively.

  The LA-cell may be configured to transmit LA-cell system information to the active terminal only during the second period (ie, neither during the first period nor during the gap). Alternatively, the LA-cell may be sent (partially) outside the second period, for example, at the idle terminal, and / or another format (eg, lower bit rate, simpler coding, etc.) 2.) It may be configured to transmit system information of any LA-cell according to a terminal in standby state which is not intended to relate to the same system information. For example, to support the exchange of some user data via a dedicated signal connection and / or the LA-cell, the exchange of data via the LA-cell is always possible (as a matter of course in the case of TDD as described above) Taking into account assigned time zones).

  In one embodiment, in a network where multiple LA-cells may transmit its system information, different LA-cells occur substantially simultaneously, for example, at any time within a 100 millisecond period. It may be configured to synchronize the transmission of their system information. The advantage of such means is that there is no need to distinguish between the terminal and / or the LA-cell that may be associated with the terminal, and for 100 milliseconds, the SA-cell only Only a free transmission schedule is required. The disadvantage of such means is that the terminal is able to receive and acquire system information only from a single LA-cell, perhaps in any period of 100 ms. In another embodiment, different LA-cells may be configured to synchronize transmission of their system information substantially occurring, for example, in a continuous period of 100 milliseconds. In such an embodiment, the terminal has the advantage of being able to receive and acquire system information from multiple (e.g., two) LA-cells in consecutive 100 millisecond response time zones. The disadvantage of such means is that the SA-cell throughput of user data can be further reduced, possibly the need for scheduling of free transmission period of SA-cell per terminal (or per at least one pair of LA-cells) It is a certain thing.

Terminals in the running state without the need for any LA-cell system information may be configured to maintain a radio interface to the SA-cell, may transmit user data at any time, and for the first period. User data, and SA-cell system information may be received for a second period (and possibly for a gap period). A running terminal that wants to receive LA-cell system information may be configured to continue sending and / or receiving user data during the first time period. Then, towards the end of the first period, the terminal will reconfigure the radio interface to the LA-cell (a time gap may facilitate this) and receive the LA-cell system information, Towards the end of the second period, the radio interface to the SA-cell is reconfigured (with time gaps may again facilitate this) without more delay. Thereafter, the terminal may resume transmission and / or reception of user data via the SA-cell during the next first period.

  As indicated above, in this configuration, especially in the first alternative of system information of SA-cell and system information of LA-cell, in this configuration transmission of system information by SA-cell and LA-cell is additional SA The transmission of cell system information is arranged to occur substantially simultaneously during the second period which may occur during the gap between the first and second periods.

More Flexible Configuration In this configuration, there is no predetermined repeating sequence of the first and second predetermined time periods.

  The SA-cell is predetermined, designated, indicated, and / or predetermined to a particular terminal which may transmit or suspend user data transmission continuously or downstream, and may transmit user data. Alternatively, user data of suspension of user data transmission of SA-cell, which has been instructed to the SA-cell in advance by a specific terminal, may be transmitted. Thus, the terminal may receive system information from, for example, one or more LA-cells, if the SA-cells need a free period of transmission of user data, eg, one or more LA-cells. It is possible to have full control for the purpose of making the above signal level measurements and / or contacting with one or more LA-cells (e.g. with the exchange of signaling information). This also enables the correction of unique terminals and unique opportunities of free periods of transmission of user data of SA-cells. For example, the terminal of the slow reconfiguration means of the wireless interface may be another terminal of the quick reconfiguration means of the wireless interface or full system information within a period of, for example, 100 milliseconds, than the exemplary 100 milliseconds. By aiming to receive and acquire a part of the specific system information according to the expected transmission time and to request a free period of transmission of a shorter SA-cell, it is possible to command a part of the specific system information. The transmission of longer SA-cells may be ordered at free time than the required terminal.

  In a more flexible configuration, when the SA-cell suspends user data transmission to a particular terminal in the downlink, the SA-cell may continue to transmit user data to another non-disrupted terminal. .

  For the transmission of SA-cell system information by the SA-cell, all the options relating to the configuration described above are opened without strong preference. For example, an SA-cell may be configured to transmit its SA-cell system information substantially continuously, at a moderate bit rate, as is conventional. In another example, the SA-cell may be configured to transmit SA-cell system information in short bursts and higher bit rates.

  The SA-cell may be configured to receive user data at any time. That is, the terminal may select whether or not to transmit user data to the SA-cell (in the case of TDD, naturally taking into account the assigned time zone as described above) Good.

It is known that the LA-cell transmits the system information of the LA-cell, preferably in short bursts, according to a predetermined schedule (for example, periodically) determined in advance, for example by the monitoring terminal of the LA-cell. Or demodulated by the supervisory terminal of the LA-cell,
It may be configured by a predetermined LA-cell or network node, such as some network management units or synchronization units. To support the above LA-Cell substitution for "very simple configuration", the LA-Cell, like transmitting any LA-Cell system information except in the second period, It is an option in the configuration.

  For example, to support dedicated signaling connections and / or to support the exchange of any user data via the LA-cell, the exchange of data via the LA-cell (in the case of TDD, of course It may be performed at any time taking into account the assigned time zone as described above.

  A terminal in a running state that does not require arbitrary LA-cell system information may maintain its wireless interface configured in the SA-cell, may transmit user data at any time, or may System information may be received at any time (at least when system information of the SA-cell has been sent). Terminals in the active state that require LA-cell system information are SAs with data-connected terminals when it is necessary for the SA-cell to pause (interrupt) its downstream transmission of user data to the particular terminal. -The indication to the cell may be configured to be provided first. Finally, the terminal may, for example, follow single schedules with specified start and end times, single breaks with specified start times and multiple breaks, or according to a periodic schedule. , Etc. may be provided. Transmission of user data downstream of an SA-cell that may not occur at all, may occur once, or may occur repeatedly (perhaps at different times) if paused (suspended) May be compared to the second period described in "very simple configuration" in this more flexible configuration, with a difference between the defined terminal and the unique terminal period. After providing the indication to the SA-cell, the terminal may continue to transmit and / or receive user data until the start of the interruption. At the start or after, the terminal may reconfigure the radio interface to the LA-cell. The time to do so shall be taken into account when specifying the start time of suspension of user data in the downlink to the SA-cell, if it is known to the terminal. A terminal that has enabled the LA-cell radio interface reconfigures the radio interface back to the SA-cell rather than receiving LA-cell system information or at least the relevant part of that information towards the end of the interruption at the latest. May be Similar to the time to reconfigure the radio interface of the terminal to the LA-cell, the time to reconfigure the radio interface of the terminal to the SA-cell shall be known to the terminal and the downlink SA-cell's It shall be taken into consideration when specifying the end time of suspension of user data. The terminal may resume sending and / or receiving user data from the end of the suspension.

As indicated above, this configuration does not require coordination of the transmission of system information by SA-cells and LA-cells. However, the terminal needs to monitor LA-cell system information, and can not monitor SA-cell system information during their time ("second period"), repeatedly, stable, all Would miss the SA-cell system information. This can occur if SA-cell system information sent in short bursts matches the transmission of LA-cell system information. The terminal may also repeatedly and stably transmit SA-cell system information substantially continuously, but may miss part of the system information of a particular SA-cell. In order to avoid such a situation, preferably, the SA-cell and LA-cells are such that the repetition rate of SA-cell system information transmission is different from the repetition rate of LA-cell system information. It will synchronize the transmission of system information. In such synchronization, a portion of the SA-cell system information may be stably missed by the terminal repeating the same portion of the SA-cell system information, but shifting along the SA-cell system information. Will do. This may for example be shorter than the repetition time of the LA-cell system information, which corresponds to the transmission duration of the (possibly short) LA-cell system information for the terminal in the running state (ie the second duration), Or by selecting the repetition time of the system information of the SA-cell, which is either long or long. An alternative solution is to configure such an SA-cell to skip such a second period and to receive and obtain SA-cell system information or explicitly requesting terminals, and its radio interface As a maintaining terminal, eg, again for exchanging user data, in order to provide some designated SA-cell system information to the SA-cell via a dedicated channel used for exchanging user data, for example It may be particularly advantageous to apply options # 2 and # 5 of example # 1 over the dedicated channel used for.

  The SA-cells may overlap at least partially with a coverage area by multiple LA-cells, so in this configuration adjacent LA-cells occur at substantially the same time, It is not necessary to synchronize their LA-cell system information transmissions. An indication of suspension of SA-cell user data transmission in the downstream corresponding to a period during which the terminal transmits LA-cell system information of the LA-cell (ie, a specific LA-cell that is to monitor the terminal); Or you may order. However, in this embodiment, transmission of synchronized LA-cell system information may still be performed. Such measures may be advantageous for the terminal, as it is not necessary to designate another break period for another LA-cell.

Most flexible configuration
This configuration is a larger configuration according to the above-mentioned "more flexible" configuration, with interruptions at the start and end of the SA-cell user data downstream (ie, suspension of transmission of user data downstream and Resume) is specified by the terminal in the running state every moment.

  In one embodiment, the terminal may also send a command to suspend the transmission of SA-cell user data downstream without specifying a time or with the application of a command specifying a future specific time. Good. An SA-cell that has received an instruction that is associated with the current moment, ie, applied as soon as possible, or as soon as reasonably possible, may be configured to interpret the instruction without timing. For example, after receiving an instruction to pause immediately, the SA-cell may, for example, abort further transmissions to its terminal, as the current transmission block or frame of user data is completed. It may be configured. After receiving the immediate resume command, the SA-cell may be configured to resume transmission to the terminal immediately.

  In another embodiment, the terminal may send an instruction to suspend the transmission of SA-cell user data downstream at any specified time. An SA-cell receiving a pause command at a designated time may be configured to interpret the SA-cell transmission to the terminal as a command that must be stopped at a designated time at the latest. The command to resume the designated time indicates that the SA-cell can resume transmission to the terminal from the designated time as soon as possible.

  It is possible to immediately resume the transmission time of the SA-cell with instant, instant-by-moment, based on the provision to the terminal with additional flexibility to specify a pause and resume the SA-cell transmission. The terminal performs the LA-cell operation and does not wait for the end of the transmission period of the LA-cell system information. Those skilled in the art will immediately understand how to apply the above description of the more flexible configuration to allow the start and end of SA-cell user data transmission downstream, on an instant by instant basis. Because the results are concise in order to be specified on the basis, the description will not be repeated here.

Example # 3: Delivery of LA-Cell System Information and SA-Cell System Information of LA-Cells in an Energy Efficient Network In connection with the above description, as illustrated in FIGS. Initially, it is assumed that terminals in a standby state are camped on on the LA-cell 32 without exchanging user data via the SA-cells 33 and 34. Terminal 35 may, for example, use a dedicated channel for the purpose of exchanging user data using SA-cell 34 via a data connection established between terminal 35 and SA-cell 34. May be According to the embodiment of Example # 3, the SA-cell system information for at least SA-cell 34 and the LA-cell, similar to the system information for the other SA-cell and the other LA-cell in the network 30 The problem of the address of terminal 35 obtaining SA-cell system information, which comprises system information including LA-cell system information about 32, may be associated with terminal 35.

  In this example embodiment, the LA-cell, eg, the LA-cell 32, is likely to be LA, as is the SA-cell system information of any portion of at least multiple SA-cells, possibly for terminals within the coverage area of the LA-cell -Based on the idea that it may be used to transmit cell system information. Example # 3 may be divided into two main embodiments, shown respectively in FIGS. In the first embodiment, the LA-cell 32 uses a communication / common channel to transmit all system information of the terminal. In a second embodiment, the LA-cell 32 uses one or more dedicated signaling channels to transmit at least any system information to the individual terminals. These embodiments are described in more detail below.

Use of Communication / Common Channel FIG. 11 schematically shows, according to one embodiment of the present invention, an LA-cell providing the terminal with both LA-cell system information and SA-cell system information. . In the example shown in FIG. 11, the LA-cell 32 is shown transmitting its system information as well as the system information of one or more SA-cells associated with the terminal 35 via the communication channel 71. . The idle terminal then only needs to enable the LA-cell radio interface, at least while the LA-cell system information communication channel continues to monitor. This enables the terminal in standby state to obtain all system information on the LA-cell and possibly all relevant SA-cells in the coverage area of the LA-cell. The terminal in the standby state may store the acquired system information or may keep updating data. When establishing a data connection with a particular SA-cell, the idle terminal may further use stored system information for the particular SA-cell. Such operation of the terminal is supported by any of the terminal configurations (i), (ii) and (iii) described above.

  As shown in FIG. 11, each active terminal exchanging user data using SA-cell 34 via dedicated data channels 72, 73 and 74 further communicates by LA-cell 32. The system information may be configured to be monitored. Terminal 35 may be configured to monitor LA-cell and SA-cell system information communicated by the LA-cell 32 either periodically or in the case of receiving triggered updates. .

  About the form of Example # 3 shown by FIG. 11, the structure of two terminals is assumed.

The use of the terminal of configuration (i) described above is to allow the terminal in the running state to exchange user data via SA-cell 34, possibly to the extent necessary for continuous and / or user data exchange. It is configured to use a cell radio interface. The terminal may, for example, periodically or otherwise trigger to monitor system information communication of the LA-cell by the LA-cell 32 using the communication channel 71 including system information of the LA-cell and SA-cell. When receiving the update, it is configured to enable its LA-cell radio interface in a relatively short time, in a preliminary manner. One advantage of such an arrangement is that user data exchange via the SA-cell may be continued without interruption. However, the terminal needs to support two wireless interfaces simultaneously, at least for a short period of time, which results in more complexity in hardware.

  The use of the terminal of configuration (ii) may be configured such that the active terminal alternates between the two radio interfaces. For the larger part of the time, the terminal has enabled the SA-cell radio interface to support user data exchange via the SA-cell 34. Next, the LA-cell radio interface is disabled. For the smaller part of the time, the terminal has only the activated LA-cell radio interface to monitor the LA-cell system information communication channel 71 which contains the system information of the LA-cell and SA-cell. There is. The SA-cell radio interface is then deactivated.

  In the communication channel 71 transmitted by the LA-cell 32, SA-cell system information may be grouped by SA-cell or group of SA-cells. Because of the higher energy efficiency of system information distribution, the LA-cell 32 may, for example, be in the necessary range, such as whether these SA-cells are in the active state or are about to be activated. Only may be configured to transmit SA-cell system information. However, to speed up the establishment of data connections via SA-cells that are not yet in the running state, the LA-cell 32 may, for example, include system information of all SA-cells, including an indication as to the running state of the SA-cell. It may be configured to transmit. In this way, both the terminal in the standby mode and the terminal in the execution mode acquire, store and update system information on each of the LA-cell and SA-cell simply by monitoring the communication channel of the LA-cell. Can be updated. Since the system information can be made available to the terminal even before it needs this information, this approach will be followed by the procedure to establish a data connection via an active SA-cell. It is possible to speed up the procedure of establishing a data connection via an SA-cell, the procedure of being handed over from one SA-cell to another SA-cell.

  Furthermore, in order to extend the system information available to the terminal, the configuration of the cell for distributing the system information on the LA-cell 32 is for example outside the cell but of the coverage area of the LA-cell 32 The system information on neighboring LA-cells and / or system information on SA-cells in the vicinity may be further expanded.

  A further refinement of the embodiment shown in FIG. 11 has changed the relevant part of the system information in order to allow the terminal in operation with the greatest attention to the exchange of user data via the SA-cell 34. In some cases, it is to provide a trigger signal or trigger message to the terminal in the running state. Such trigger signals or signaling messages may for example be sent by the network via a dedicated connection to the terminal or may be communicated by one or more SA-cells in the network. The trigger may optionally be shown in the cell or cells as being associated with the change. A terminal that has received such a trigger signal or message may thus be notified of a change in any system information and may be associated with the terminal for obtaining the changed system information.

  In an embodiment, the terminal in execution state obtains, updates, or collates system information for mobility, for handover from an old SA-cell to a new SA-cell, and from a new SA-cell, for example. As needed, when the terminal executes, any event may be interpreted as a trigger. Providing a trigger to the active terminal may be periodic, for example periodically monitoring the LA-cell communication channel for changes that may be particularly beneficial at the terminal of configuration (ii). It is in the alternation from the execution to the terminal in the execution state.

Although not the most energy efficient compared to the other embodiments, the embodiment shown in FIG. 11 allows the terminal to obtain system information of all SA-cells in the coverage area of the LA-cell, and this information later. Provide the advantage of being able to be stored for use with Thus, in the case of an active terminal establishing a data connection or performing a handover from one SA-cell to another, when the connection establishment or handover to the SA-cell is completed, The terminal will typically be able to apply the settings associated with the SA-cell more quickly compared to the situation where it only gets most of the system information for the SA-cell. This embodiment thus means that before the terminal sets up the data connection, the terminal in the standby state will also have SA-cell system information in advance, even if the terminal in the standby state has no adjacent SA-cell in the active state. It also enables the delivery of

The use of a dedicated channel or, alternatively, in the embodiments described above, a dedicated signaling approach can be used to avoid the consumption of communication resources at the LA-cell 32 to communicate system information on the SA-cell. While the SA-cell system information and / or the LA-cell system information, providing the transmission of the modification to the terminal 35b in the active state via the dedicated signal channel 82, this is a terminal in the standby state via the communication channel 81. It is schematically illustrated in FIG. 12 that the LA-cell 32 transmits its system information as well as the system information for one or more SA-cells for 35a.

  In the options of this embodiment, the data connection settings of the LA-cell 32, including the dedicated signal connection via the LA-cell 32, are also configured to provide via the dedicated signal connection 82. When appropriate, all relevant system information on the SA-cell is selected to support the connection.

  Triggered by an event, eg, when mobility is performed by the terminal for handover of an old SA-cell to a new SA-cell, or, eg, of system parameters of SA-cell and / or LA-cell. When the network, such as reconfiguration, makes changes to some system information, the dedicated signaling channel 82 via the LA-cell 32 sends the changed system information to the active terminal 35b. May be used.

  For such an execution terminal, a configuration of two terminals is assumed.

  Using the terminal in configuration (i) described above, the terminal in the running state is supposed to exchange user data via SA-cell 34, possibly to the extent necessary for continuous and / or user data exchange. That SA-cell radio interface may be used. Terminal 35 b may, for example, periodically or upon receiving a trigger to support dedicated signaling connection 82 via the LA-cell, the LA-cell system information for LA-cell 32 or the SA-cell 34. It is configured to enable the LA-cell radio interface occasionally, in a relatively short time, to receive any changes (updates) that may be any SA-cell system information. The advantage of such means is that the exchange of user data via the SA-cell 34 can continue without interruption. However, terminal 35b needs to support two wireless interfaces simultaneously, at a short time, resulting in at least higher hardware complexity.

Using the terminals in configuration (ii) above, the active terminals may be alternately configured between the two wireless interfaces. In order to receive any changes (updates), which may be LA-cell system information for LA-cell 32 or SA-cell system information for any SA-cell 34, for a smaller part of the time, While for the larger part of time, the terminal may only have SA-cell radio interface capable of supporting user data exchange via SA-cell 34 while only having an activated LA-cell radio interface You may have it.

  Because the use of a dedicated signal connection, the embodiment illustrated in FIG. 12 is expected to be more energy efficient than that of FIG. In addition, this embodiment may have advantages other than those related to the energy efficiency of system information distribution. For example, considering that the mobile terminal may lose its respective handover procedure, possibly all contact between the network and the terminal, to another SA-cell, which may be handed over frequently. There is. In handover scenarios where frequent errors are likely to occur, it is very attractive to have a stable and consistent signaling connection via LA-cell 32, and via a failed handover signaling connection. It may be repaired quickly. And, as mentioned above, it may make sense to provide the necessary SA-cell system information part to the terminal via the signal connection of the LA-cell. All additional savings associated with the dedicated connection are applied as a power control application in order to provide the terminal with system information pertaining to the dedicated signaling connection and possibly only to the relevant SA-cell. Typically, but not necessarily, lower energy efficiency always results in greater distances in terms of path loss between the terminal and the LA-cell than between the terminal and the SA-cell, and subsequent LA-cell signal connection You may win by its stability and reliability.

Example # 4: SA-Cell Delivery of LA-Cell System Information and SA-Cell System Information in an Energy Efficient Network
Similar to the embodiment # 3 in this solution as in FIG. 6, FIG. 7 and above, in this specification, the terminal 35 first exchanges user data via the SA-cell 33 via 34 It is assumed that a terminal in a standby state is camped on the LA-cell 32 without being switched. The terminal 35 is also in the running state, for example to achieve the purpose of exchanging user data with the SA-cell 34 via the data connection established between the terminal 35 and the SA-cell 34 using, for example, a dedicated channel. May be In Example # 4, the problem of the address of the terminal 35 acquiring the system information of the implemented LA-cell 32 and the SA-cell including at least the system information on the SA-cell 34 and the LA-cell 32 is probably the network 30 It may be associated for the terminal 35 as well as system information regarding other SA-cells and other LA-cells in the network.

  The embodiment of this example is an SA-cell, e.g. system information of LA-cells associated with several LA-cells, possibly for terminals at least possibly in the coverage area of the SA-cell. Similarly, it is based on the idea that it may be used to transmit SA-cell system information. Example # 4 may be separated into the two main embodiments shown in FIGS. 13 and 14 respectively. In a first embodiment, the SA-cell 34 uses a communication / common channel to transmit all system information to the terminal. In a second embodiment, the SA-cell 34 uses a dedicated channel with the active terminal to transmit at least a portion of the system information to the individual terminals. These embodiments will now be described in more detail.

Use of Communication / Common Channel According to one embodiment of the present invention, FIG. 13 is a schematic diagram of an SA-cell providing the terminal with both SA-cell system information and LA-cell system information. In the example shown in FIG. 13, the SA-cell 34 is for one or more LA-cells associated with the terminal 35b in the active state via the communication channel 91 (shown as a gray triangle in FIG. 13). Send system information as well as system information. Optionally, the SA-cell 34 may include in the communication channel 91 system information on neighboring SA-cells. Also, as shown in FIG. 13, the SA-cell 34 is connected to each of the terminals 35 b in the execution state, and data connection 92, 9
3 and 94 (eg, via dedicated channels).

  If there is a change in the LA-cell system information of the LA-cell, as indicated by the arrow 95 in FIG. 13, the LA-cell may be associated with all SAs that may be associated with the coverage area of the LA-cell. It is configured to notify the cell of the change. Such notification may be provided via a similar access network interface, such as, for example, the X2 interface in LTE. Such notified SA-cell 34 then communicates a notification of the modified system information and the modified LA-cell system information via communication channel 91. In the case of an SA-cell 34 which also communicates system information of another (e.g. adjacent) SA-cell, the same applies to the modified system information of the adjacent SA-cell, i.e. another SA-cell. The cell, the associated (adjacent) SA-cell (not shown in FIG. 13) and the SA-cell 34 are then modified for another SA-cell via the modified system information and communication channel 91. It is configured to notify communication of SA-cell system information.

  The active terminal 35b, which receives the notification of the changed system information, acquires the changed system information for another SA-cell via the communication channel 91 of the LA-cell and / or the serving SA-cell 34. Do.

  The embodiment shown in FIG. 13 is very attractive from an energy efficiency point of view, as the distance between the SA-cell and the terminal is usually very short compared to the distance between the LA-cell and the terminal. It is. However, at least some LA-cell system information, eg, LA-cell network, LA-cell ID, various parameters associated with LA-cell communication channel, LA-cell, to support the terminal 35a in a standby state. The neighbor cell list etc. needs to be transmitted by the LA-cell 32 itself as shown in the communication channel 96. This gain of such energy efficiency applies mainly to the part of the LA-cell system information that is relevant only for the running terminal, eg the handover parameters.

  In an embodiment, a portion of the LA-cell system information associated with the idle terminal may also be in the active terminal 35b for very quick cell search and / or cell reselection after completing the data connection. May be transmitted by the SA-cell 34 which provides the advantage of this information that it can be used. However, in this embodiment, a slight decrease in energy efficiency gain may result in this duplicate transmission of LA-cell system information.

  An SA-cell that communicates at least any LA-cell system information of one or more LA-cells that share several coverage areas does not require a terminal to use that LA-cell radio interface It may have the added benefit of providing the terminal in the active state with information on the associated LA-cell (s). For example, when the SA-cell 34 will communicate any system information for a single LA-cell, the active terminal receiving this system information will complete the data connection. It may be concluded that one will almost certainly find a place to re-camp on a particular LA-cell.

In another example, for example, any system related to the SA-cell being handed over to a running terminal, and two LA-cells (ie, the LA-cell has already been associated with a "new" LA-cell) When the SA-cell 34, which communicates information, the next terminal will complete the data connection, it will be approximately in order to make a choice between two single main candidates to re-camp on. It can be concluded that you will surely find yourself. At the terminals of configuration (i) or (ii) above, transmission of LA-cell system information for two LA-cells may trigger the terminal to perform measurements on these particular LA-cells. As the SA-34 cell provides more detailed information about the most relevant neighboring LA-cell (s), the information of the terminal's LA-cell's neighbor cell list should be ignored even if it is present it can. The LA-cell (possibly multiple) providing all those system information may not be the most energy efficient from the narrow point of delivering the LA-cell's system information, but nevertheless it is In the terminal of configuration (ii), it may be beneficial for the terminal, since it can significantly reduce the time for the LA-cell radio interface which needs to be enabled, usually at low data rates. In the terminal of configuration (iii) above, the terminal need only obtain system information of the LA-cell delivered by the SA-cell that has terminated its data connection. The number of LA-cells delivered by SA-Cells given system information is eg one, two or three LA-cells and thus cell search and / or cell reselection for the terminal Speed up the procedure, which is likely to be more limited as it has already obtained system information related to these LA-cells.

Use of dedicated channel
Instead of the embodiments described above, a dedicated signaling approach can be used to avoid the consumption of communication resources in the SA-cell 34 of communication system information on LA-cells. This is a diagram for the SA-cell 34 to transmit LA-cell system information or changes to that information and optionally to transmit those changes via system information and / or dedicated signaling channels 102-104. At 13, the system information of the SA-cells regarding the other (eg adjacent) SA-cells and their modifications, as well as the channels 92-94 additionally indicated by the dashed arrows, to the terminal 35b in the active state In order to transmit user data via a dedicated channel, it is schematically shown in FIG. 14 by solid arrows via dedicated signal channels 102-104 established using these terminals. The remaining procedure is similar to that described for the embodiment shown in FIG. That is, communication channel 101 (shown as a gray triangle in FIG. 14), like communication channel 91 described above, is SA-cell 34 for communicating SA-cell system information for terminal 35b in the active state. Used by When there is a change in the LA-cell system information of the LA-cell, the LA-cell may be related within the coverage area of the LA-cell, as indicated by the arrow 105 in FIG. It is configured to notify changes to all SA-cells. For example, of LA-cell 32 transmitting at least any LA-cell system information, such as LA-cell network, LA cell ID, various parameters associated with LA-cell communication channel, LA-cell neighbor cell list, etc. The communication channel 106 for communication is similar to the communication channel 96 described above to support the terminal 35a in the standby state.

  In the case of a running terminal that does not require LA-cell system information before termination of the connection and resuming to standby mode, for example, LA-cell handover is anticipated for the running terminal. If not, it may refrain from sending changes to the LA-cell system information and / or refrain from providing the indication of movement within the coverage area of another LA-cell until the end of the connection. It is more efficient for the cell. Then, for example, as part of the data connection release procedure, it is only necessary that the SA-cell provide the terminal with the latest LA-cell system information via communication of the dedicated signaling channel 102-104. Good. While the terminal is still running and does not actually need such LA-cell system information, in this method it is likely that many LA-cell system information changes and / or modified LA-cell coverage areas The sending of instructions may be avoided. Since the dedicated signaling channels 102-104 are assumed to support high bit rates, this transfer of LA-cell system information has a sufficient delay compared to the status of each change immediately transmitted to the terminal 35b. It can be completed without things.

The embodiment shown in FIG. 14 allows for the use of a dedicated channel that is more energy efficient than the communication channel, and also allows for the most energy efficiency given that the SA-cell has only a small size. As a result of being expected to be better, a single terminal receiving a communication or common channel is likely to be nothing more than to benefit from the transmitted system information. As shown in FIG. 13, the additional benefits as described above for the communication / common channel usage embodiment apply to this embodiment as well.

  The embodiments of Examples # 3, 4 described above may also be combined. For example, while the embodiment of Example # 4 can be used to deliver appropriate SA-cell and LA-cell system information for a terminal in an active state, the embodiment of Example # 3 is a terminal in a standby state. Can be used to deliver the appropriate SA-cell and LA-cell system information. That is, the LA-cell may be configured to transmit the appropriate SA-cell and LA-cell system information for the terminal in standby mode, and the SA-cell is for the terminal in run mode. May be configured to transmit the appropriate SA-cell and LA-cell system information.

  Furthermore, as already mentioned above, the embodiments described in connection with example # 1 are SA-cells and SA-cells and / or LA-cell system information delivered as in example # 2-4 and It may be advantageously applied to the LA-cell.

  Various embodiments of the invention may be implemented as a program product for use with a computer system. The program (s) of the program product define the functions of the embodiments (including the methods described herein), preferably contained in various storage media suitable for non-temporary, direct computer input Can. (I) A non-writable storage medium (eg, a CD-ROM drive, a CD-ROM chip, or any other type of non-volatile semiconductor memory for reading directly in a computer) Information is permanently stored on a recordable CD-ROM disc, etc., and (ii) a writable storage medium (e.g. a flexible disc or disc drive or hard disc drive or any type of random access semiconductor) The present invention is not limited to one in which changeable information is stored on a memory, a flash memory, and the like. The computer program may be run on a processor as described herein.

Claims (14)

At least a small area cell (SA-cell) (33, 34) configured to provide a data connection to a terminal (35) in run mode and a terminal (35) in standby mode accept camping In a wireless communication network system (30) characterized in that it comprises a large area cell (LA-cell) (32) configured as above, said terminal (35) comprises at least a large area cell (LA-cell) A method for receiving system information of (32) and system information of a small area cell (SA-cell) (33, 34), comprising
When the terminal (35) is in an execution mode and the SA-cell wireless communication interface of the terminal (35) is enabled, the terminal (35) is the small area cell (SA-cell) (33, 34) through the SA-cell wireless communication interface, at least a first portion of system information of the small area cell (SA-cell) (33, 34), and at least the large area cell Receiving (LA-cell) (32) the first part of the system information;
A method for receiving system information characterized by:   When the terminal (35) is in the execution mode and the SA-cell wireless communication interface of the terminal (35) is enabled, at least the small area cell (SA-cell) via the SA-cell wireless communication interface Receiving a second portion of system information of said small area cell (SA-cell) (33, 34) with respect to (33, 34), or at least one or more other small areas on a wireless communication network; The method according to claim 1, characterized in that it receives system information of the small area cell (SA-cell) (33, 34) for a cell (SA-cell) (33, 34).   When the terminal (35) is in standby mode and the LA-cell wireless communication interface of the terminal (35) is enabled, at least a second of system information of a large area cell (LA-cell) (32) Method according to claim 1 or 2, characterized in that it receives a part.   From the large area cell (LA-cell) (32) when the terminal (35) is in standby mode and the LA-cell wireless communication interface of the terminal (35) is enabled, the LA-cell wireless communication interface The method according to claim 3, characterized in that at least a second portion of system information of the small area cell (SA-cell) (33, 34) is received.   From the small area cell (SA-cell) (33, 34) when the terminal (35) is in execution mode and the SA-cell wireless communication interface of the terminal (35) is enabled, the SA-cell wireless At least one of system information of said large area cell (LA-cell) (32) for at least one or more other large area cells (LA-cell) (32) on a wireless communication network via a communication interface 5. A method according to any one of the preceding claims, characterized in that it receives a part.   The SA-cell wireless communication interface is disabled when the LA-cell wireless communication interface is enabled, and the LA-cell wireless communication interface is disabled when the SA-cell wireless communication interface is enabled. The method according to any one of the preceding claims.   A terminal (35) comprising means for performing the steps of any one of claims 1-6.   A computer program comprising software code portions configured to perform the steps of any one of claims 1 to 6 when executed by a processor. For use in the method according to any one of claims 1 to 6 or for use with a terminal (35) according to claim 7
Receiving at least a first portion of system information of the large area cell (LA-cell) (32) from the large area cell (LA-cell) (32) or a management unit of a wireless communication network;
Transmit at least a first portion of system information of the large area cell (LA-cell) (32) and at least a first portion of system information of the small area cell (SA-cell) (33, 34) As you
Small area cell (SA-cell) (33, 34) characterized in that it is configured.   At least a portion of a first portion of system information of at least the large area cell (LA-cell) (32), and a first of system information of the at least the small area cell (SA-cell) (33, 34) Of at least a portion of the part of the system information of the large area cell (LA-cell) (32) or the small area cell (SA-cell) (33, 34); The small area cell (SA-cell) (33, 34) according to claim 9, characterized in that transmission is repeatedly performed in a second transmission period adjacent to the transmission period.   The small area cell (SA-cell) (33, 34) according to claim 10, wherein the length of the second transmission period is at least as long as the first transmission period.   The small area cell (SA-cell) (33, 34) may be the terminal (35), the large area cell (LA-cell) (32), another node of a wireless communication network, or a wireless communication network. At least a portion of the first portion of system information of at least the large area cell (LA-cell) (32) and / or at least the small area cell (SA) upon receipt of a trigger from the management unit. The small area cell (SA-cell) (33, 34) according to any one of claims 9 to 11, characterized in that it transmits a first part of the system information of the cell (33, 34). .   At least a portion of the first portion of the system information of the large area cell (LA-cell) (32) and / or at least after the trigger has been received and after a predetermined delay period has elapsed The first part of the system information of the small area cell (SA-cell) (33, 34) may be the first system information of the large area cell (LA-cell) (32) or the small area · · · The small area cell (SA-cell) (33, 34) according to claim 12, characterized in that it transmits the first system information of the cell (SA-cell) (33, 34). 14. A device according to any of claims 9 to 13 for use in a method according to any one of claims 1 to 6, or with a terminal (35) according to claim 7 or For use with area cells (SA-cells) (33, 34)
A plurality of small area cells (SA-cells) (33), at least a first portion of system information of large area cells (LA-cells) (32) being included in a wireless communication network for transmission with a terminal. , 34) to supply one of
A large area cell (LA-cell) (32) characterized in that it is configured.