CN107770733B - Data communication method, device and system - Google Patents
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The embodiment of the invention provides a method, a device and a system for data communication. The method comprises configuring at least one first access resource and at least one second access resource, wherein the first access resource and the second access resource are not overlapped; broadcasting configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message; configuring at least one part of the at least one first access resource and the at least one second access resource as available access resources, and sending information for indicating the available access resources to the one or more user equipment through downlink messages or downlink signals; receiving uplink signals from the one or more user equipments over the available access resources. The base station BS provided by the embodiment of the invention can flexibly configure the random access resource, and compared with the prior art, the utilization rate of the system resource is improved.
Description
Technical Field
The present invention relates to the field of mobile communication networks, and in particular, to a method, an apparatus, and a system for data communication.
Background
With the development of mobile communication technology, especially the use of intelligent terminals, the development of mobile networks is greatly promoted, so that the demand of broadband mobile networks is increasing, and the increase is continuing. According to predictions, 500 billion or more Machine Type Communication (MTC) devices will be connected to the network in the future. Development of smart hardware is emerging, such as smart bracelets, smart watches, smart meters, etc. are gradually accepted and used, and it is expected that such Machine-type communication or Machine-to-Machine communication (Machine to Machine, M2M) will be more prevalent in the future and will place higher communication demands on future mobile networks.
On 3GPP RAN1#84 conferences, consensus was reached: a plurality of different parameter sets (numerologies) may be configured within one frequency range, the different numerologies having different frequency domain subcarrier spacings, time domain Cyclic Prefixes (CPs), and symbol (symbol) lengths. Different numerology is mainly defined in consideration of the fact that the future 5G needs to adapt to different service types, and each different service Type has different characteristics, for example, high speed mobile service is suitable for configuring the subcarrier spacing to be larger, and massive Machine Type Communication (mtc) is suitable for subcarrier spacing to be smaller.
In addition, the 5G considers a flexible air interface, which may make the bandwidth of each sub-band (bandwidth occupied by a numerology) flexible and variable, and may dynamically adjust the bandwidth size according to the service requirement. These characteristics present challenges to the random access technology.
In an existing Long Term Evolution (LTE) system, when a user accesses the system, the system access is performed through a random access procedure. The random access procedure includes 4 steps, as shown in fig. 1, including preamble sequence transmission, random access response, transmission of message 3 (which is exactly the third message, because in the random access procedure, the content of these messages is not fixed, sometimes it may carry radio resource control connection request, sometimes it may carry some control messages or even service data packets, and therefore it is referred to as message 3 for short), and collision resolution message. The random access of LTE is currently done through four messages (except for dedicated handover procedures). For the random access first message, a preamble sequence (preamble) is sent on a designated resource, and the configuration of the random access resource is configured through a system message, for example, configured in a System Information Block (SIB). When User Equipment (UE) has data to arrive but no UpLink resource, UpLink scheduling resources (UpLink Grant, UL Grant) are acquired through a random access process, and UpLink Time Alignment (TA) is performed at the same time.
The configuration of the random access resource is slightly different between Time Division Duplex (TDD) and Frequency Division Duplex (FDD), but the method is basically similar. Namely, the position of the time frequency resource is appointed, and the position information of the time frequency resource is broadcasted in the SIB message. Specifically, in the SIB2 configuration, the parch-configIndex is used to configure the time-frequency resource location, and the prach-FreqOffset is used to configure the frequency-domain resource location. FDD currently supports only one resource configuration in the frequency domain in LTE, and the time domain resource may have multiple configuration options, such as even subframes, odd subframes, all subframes, and the like. While TDD may configure multiple resources in the frequency domain.
Since the random access resource is configured by the system message, it is configured and will not change for a certain period of time, if the resource configuration is to be changed, it needs to be changed by the system message change process, and all terminals need to update their configurations.
The prior art has the following disadvantages: once the existing LTE random access resources are configured, they may not change for a relatively long time, and if there are more UEs accessed in this time, the number of user access collisions may increase, which may reduce the random access success rate and affect the user experience. In addition, when there are few UEs accessing, the random access resource will not be used as other transmission resource, which may cause resource under-utilization.
For a future 5G system, the system can simultaneously support Mobile broadband (MBB), MTC, high-reliability Low-Latency Communication (URLLC), and the connection density is very high, and may reach a connection density of 1,000,000UE/km2, most of them may be MTC devices, which generally have a high requirement on energy consumption and bursty transmission, may have a very high requirement on resources in a certain time period, and then sharply decreases. Considering the problem of energy consumption, the transmission success rate is required to be higher, and if the transmission is carried out for multiple times, the problem of higher energy consumption is caused. Therefore, the conventional LTE random access procedure and access resources may not meet the requirements of the future 5G system.
Disclosure of Invention
In order to solve the technical problem that the random access of the existing LTE system is not flexible enough, embodiments of the present invention provide a method, an apparatus and a system for random access, where the technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a method for data communication, including configuring at least one first access resource and at least one second access resource, where time-frequency resources where the first access resource and the second access resource are located are not overlapped; transmitting configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a broadcast channel; configuring at least one part of the at least one first access resource and/or at least one second access resource as available access resources, and sending information used for indicating the available access resources to the one or more user equipment through downlink messages or downlink signals; receiving uplink signals from the one or more user equipments over the available access resources.
In one possible design, the method may further include configuring at least one third access resource.
In another possible design, the configuration information indicating the at least one first access resource and/or the at least one second access resource is broadcasted to one or more user equipments through a system resource block SIB 2;
in another possible design, the downlink signal is a cell common reference signal. It should be understood that the cell common reference signal is used as an example, and the name change of the cell common reference signal does not affect the implementation and possible infringement of the patent. If a new name is adopted in the future 5G, it is also within the scope of the present invention as long as the function of the signal corresponding to the new name is consistent with the function of the cell common reference signal in the prior art. The information for indicating the available access resources is sent to the user equipment through the CRS, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information identifying the available access resources is represented in a binary format, where 1 identifies that the access resources are available and 0 identifies that the access resources are not available.
In another possible design, binary information identifying available access resources is included in an initialization algorithm for the pseudo-random sequence.
In another possible design, the downlink signal is a synchronization signal. The information for indicating the available access resources is sent to the user equipment through the synchronous signal, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information identifying the available access resources is included in a secondary synchronization signal.
In another possible design, the downlink message is a physical downlink control channel signaling. It should be understood that the physical downlink control channel is only used as an example in the present patent application, and the name change of the physical downlink control channel does not affect the implementation and possible infringement of the present patent. If a new name is adopted in the future 5G, it is also within the scope of the present invention as long as the function of the signal corresponding to the new name is consistent with the function of the physical downlink control channel in the prior art. The information for indicating the available access resources is sent to the user equipment through the physical downlink control channel, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information for identifying the available access resources is included in an initialization formula of a scrambling code sequence.
In another possible design, the downlink message is a master information block. It should be understood that the main information block is used as an example, and the name of the main information block is not changed to affect the implementation and possible infringement of the patent. If a new name is adopted in the future 5G, the protection scope of the present invention should also fall within the protection scope as long as the function of the signal corresponding to the new name is consistent with the function of the master information block in the prior art. The information for indicating the available access resources is sent to the user equipment through the master information block, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information indicating the available access resources has a length of at least 2 bits.
In a second aspect, an embodiment of the present invention further provides a method for data communication, including receiving a broadcast message from a base station BS, where the broadcast message carries configuration information for indicating at least one first access resource and/or at least one second access resource; receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources; and accessing the base station according to the information of the available access resources.
In one possible design, the method further includes obtaining time-frequency information of the at least one first access resource and/or the at least one second access resource according to the configuration information indicating the at least one first access resource and/or the at least one second access resource.
In another possible design, the time-frequency information of the at least one first access resource and/or the at least one second access resource is acquired by reading the SIB2 message.
In another possible design, the prach-additional configinfo-L1 is used to identify the first access resource, and the prach-additional configinfo-L2 is used to identify the second access resource, it should be understood that the prach-additional configinfo-L1 and the prach-additional configinfo-L2 are only exemplary names, and in a specific implementation, names used to identify the first access resource and the second access resource may be different, and the different names do not affect the implementation and possible infringement of the patent.
In another possible design, the downlink signal is a cell common reference signal. The information for indicating the available access resources is sent to the user equipment through the CRS, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information identifying the available access resources is represented in a binary format, where 1 identifies that the access resources are available and 0 identifies that the access resources are not available.
In another possible design, binary information identifying available access resources is included in an initialization algorithm for the pseudo-random sequence.
In another possible design, the downlink signal is a synchronization signal. The information for indicating the available access resources is sent to the user equipment through the synchronous signal, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information identifying the available access resources is included in a secondary synchronization signal.
In another possible design, the binary information for identifying the available access resources is included in an initialization formula of a scrambling code sequence.
In another possible design, the binary information identifying the available access resources is obtained by descrambling the scrambling code sequence.
In another possible design, the downlink message is physical downlink control channel PDCCH signaling. The information for indicating the available access resources is sent to the user equipment through the PDCCH, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information indicating the available access resources has a length of at least 2 bits.
In another possible design, the downlink message is a master information block MIB. The information for indicating the available access resources is sent to the user equipment through the MIB, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In a third aspect, an embodiment of the present invention further provides an apparatus, including: a processing unit, configured to configure at least one first access resource and at least one second access resource, where the first access resource and the second access resource do not overlap; configuring at least a portion of the at least one first access resource and at least one second access resource as available access resources; a sending unit, configured to broadcast configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message; transmitting information indicating available access resources to the one or more user equipments through a downlink message or a downlink signal; a receiving unit, configured to receive uplink signals from the one or more user equipments through the available access resources.
In one possible design, the downlink signal is a cell common reference signal CRS. The information for indicating the available access resources is sent to the user equipment through the CRS, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information identifying the available access resources is represented in a binary format, where 1 identifies that the access resources are available and 0 identifies that the access resources are not available.
In another possible design, binary information identifying available access resources is included in an initialization algorithm for the pseudo-random sequence.
In another possible design, the downlink signal is a synchronization signal. The information for indicating the available access resources is sent to the user equipment through the synchronous signal, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information identifying the available access resources is included in a secondary synchronization signal.
In another possible design, the downlink message is physical downlink control channel PDCCH signaling. The information for indicating the available access resources is sent to the user equipment through the PDCCH, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information for identifying the available access resources is included in an initialization formula of a scrambling code sequence.
In another possible design, the downlink message is a master information block MIB. The information for indicating the available access resources is sent to the user equipment through the MIB, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information indicating the available access resources has a length of at least 2 bits.
In a fourth aspect, an embodiment of the present invention further provides an apparatus, including a receiving unit, configured to receive a broadcast message from a base station BS, where the broadcast message carries configuration information indicating at least one first access resource and/or at least one second access resource; receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources; and the processing unit is used for accessing the base station according to the information of the available access resources.
In a possible design, the processing unit is further configured to obtain time-frequency information of the at least one first access resource and/or the at least one second access resource according to the configuration information indicating the at least one first access resource and/or the at least one second access resource.
In another possible design, the time-frequency information of the at least one first access resource and/or the at least one second access resource is acquired by reading the SIB2 message.
In another possible design, the prach-additional ConfigInfo-L1 is used to identify the first access resource and the prach-additional ConfigInfo-L2 is used to identify the second access resource.
In another possible design, the downlink signal is a cell common reference signal CRS. The information for indicating the available access resources is sent to the user equipment through the CRS, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the information identifying the available access resources is represented in a binary format, where 1 identifies that the access resources are available and 0 identifies that the access resources are not available.
In another possible design, binary information identifying available access resources is included in an initialization algorithm for the pseudo-random sequence.
In another possible design, the downlink signal is a synchronization signal. The information for indicating the available access resources is sent to the user equipment through the synchronous signal, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information identifying the available access resources is included in a secondary synchronization signal.
In another possible design, the binary information for identifying the available access resources is included in an initialization formula of a scrambling code sequence.
In another possible design, the downlink message is physical downlink control channel PDCCH signaling. The information for indicating the available access resources is sent to the user equipment through the PDCCH, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
In another possible design, the binary information identifying the available access resources is obtained by descrambling the scrambling code sequence.
In another possible design, the downlink message is a master information block MIB. The information for indicating the available access resources is sent to the user equipment through the MIB, so that the system signaling overhead can be saved, and the resource utilization rate can be improved.
The technical problem to be solved by the embodiment of the invention is as follows: on the basis of meeting the access success rate of the system, the resource utilization rate of the base station side is improved.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the base station BS provided by the embodiment of the invention can flexibly configure the random access resource, and compared with the prior art, the utilization rate of the system resource is improved. Flexible configuration can be understood as: the system efficiency is not influenced in the process of configuring the random access resources, the resource change notification overhead is not increased, and the influence on the UE is reduced as much as possible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional LTE system random access process;
fig. 2 is a schematic diagram of a network structure according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for data communication according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a FDD system or a TDD system for a first access resource and a second access resource;
FIG. 5 is a diagram illustrating the definition of independent resources and incremental resources provided by an embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for data communication according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of an apparatus 700 according to another embodiment of the present invention;
FIG. 8 is a schematic diagram of an apparatus 800 according to yet another embodiment of the present invention;
FIG. 9 is a schematic diagram of an apparatus 900 according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus 1000 according to yet another embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one skilled in the art from the embodiments given herein are intended to be within the scope of the invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the invention in its embodiments for distinguishing between objects of the same nature. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA), a General Packet Radio Service (GPRS) System, a Long Term Evolution (LTE) System, a Frequency Division Duplex (FDD) System, a Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) Communication System, and a future 5G Communication System.
The user equipment of the present invention can communicate with one or more core networks via a Radio Access Network (RAN), and the user equipment may refer to an Access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a UE in a future 5G network, etc.
The network device of the present invention may be a network-side device for communicating with a user equipment, and for example, may be a Base Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB) in a WCDMA system, an evolved Node B (eNB) in an LTE system, or an eNodeB, or the network device may be a relay Station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or a network-side device in a future evolved PLMN network.
Fig. 2 is a schematic architecture diagram of a communication network 200 according to an embodiment of the present invention. The network device 202 manages uplink communication and downlink communication of each UE 204-210 in its coverage area (in FIG. 2, a mobile phone or a laptop computer is taken as an example of the UE, and the UE in FIG. 2 may also be the other terminal device). The network device 202 may alternatively be referred to as a cell tower, eNodeB, access network, base station BS, etc. Network device 202 may support transmission of multiple cellular carriers simultaneously.
Considering that a 5G network will support many different service types and that there are a large number of terminals per service, the BS will be required to provide more access resources. As described above, considering the characteristics of different services, such as that the mtc type service is infrequent, the random access may not be performed for a long time after one system access, and therefore, too many random access resources are configured, which may cause system waste. Meanwhile, before random access, a general terminal reads a system message, as described above, the existing system message includes an access resource, but the resource is configured by the system, and if the access resource notification is performed through a system message updating process, the cost is high, and the system may not be suitable for a 5G system.
The technical problem to be solved by the invention is as follows: on the basis of meeting the access success rate of the system, the resource utilization rate can be improved. The flexible configuration of the access resources means that the configuration process does not affect the system efficiency, the resource change notification overhead should not be increased, and the influence on the terminal is reduced as much as possible.
The idea of the embodiment of the invention is based on the following: the method comprises the steps of classifying random access resources, configuring one or more first access resources (which can also be called first random access resources and are referred to as first access resources in a unified way and are referred to as second random access resources in a unified way and are referred to as second access resources in a unified way), and flexibly configuring and using the first access resources or the second access resources, or the first access resources and the second access resources by the BS according to the service change or the number of the UE.
It should be understood that the system may also configure the third access resource.
It should also be understood that the configuration procedure for the first access resource or the second access resource in the following embodiments of the present invention is substantially the same as that of the existing LTE. I.e. configuring the location of the time-frequency resources, and then sending location information identifying the time-frequency resources of the first access resource and the second access resource to one or more UEs via a broadcast message SIB 2. Specifically, in the SIB2 configuration, the prach-ConfigIndex field is used to configure the time domain resource location, and the prach-FreqOffset field is used to configure the frequency domain resource location. FDD currently supports only one resource configuration in the frequency domain in LTE, and the time domain resource may have multiple configuration options, such as even subframes, odd subframes, all subframes, and the like. While TDD may configure multiple resources in the frequency domain.
For further explanation, please refer to the following examples.
Example one
As shown in fig. 3, an embodiment of the present invention provides a method for data communication, which includes the following steps:
Specifically, the access resource may be understood as a time domain resource, a frequency domain resource, or a time frequency domain resource in the technical field of the present invention. For the description of the time domain resource, the frequency domain resource, or the time frequency domain resource, reference may be made to the description of the prior art or the prior standard, which is not described herein again.
In particular, the first access resource may be understood as a set of a plurality of resource blocks, including a plurality of resource blocks. Wherein each Resource block may be a Resource Element (RE) or an orthogonal frequency division multiplexing symbol (OFDM signal). Similarly, the second access Resource may also be understood as a set of multiple Resource blocks, where each Resource block may be a Resource Element (RE) or an orthogonal frequency division multiplexing symbol (OFDM signal). As shown in fig. 4, fig. 4 is a schematic diagram of a FDD system or a TDD system for a first access resource and a second access resource, respectively.
In a specific implementation manner, in step 310, the implementation manner of the at least one first access resource and the at least one second access resource is as follows:
wherein the prach-additional configinfo-L1 is used to identify the first access resource and the prach-additional configinfo-L2 is used to identify the second access resource, as will be understood by those skilled in the art. It should be understood that the pramh-additional configinfo-L1 and the pramh-additional configinfo-L2 are only exemplary names, and the names may be different in the specific implementation process, but all of the names fall into the protection scope of the embodiments of the present invention.
In step 320, broadcasting configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message, specifically including:
after configuring the first access resource and the second access resource, the BS broadcasts the configured first access resource and second access resource to one or more UEs through system messages (e.g., SIB messages and MIB messages). In this way, one or more UEs covered by the BS acquire the time-frequency location information of the first access resource and the time-frequency location information of the second access resource.
Optionally, the method further includes configuring a third access resource and notifying one or more UEs of the third access resource through a broadcast message.
Specifically, the configuration manner of the third access resource may refer to the configuration manner of the first access resource or the second access resource, which is not described herein again.
In step 330, configuring at least a part of the at least one first access resource and the at least one second access resource as an available access resource, and sending information indicating the available access resource to the one or more user equipments through a downlink message or a downlink signal, specifically including:
the BS may dynamically configure the available access resources according to the service change, taking into account the characteristics of different services. For example, when the service activity is not frequent, only the first access resource is configured as an available access resource. For another example, when the traffic activity is busy, the first and second access resources are configured as available access resources.
For example, in one case, the first, second, and third access resources are configured as available access resources, different bits may be used to identify the first, second, and third access resources, and 3 bits may be used to identify which access resources are available. For example, the first bit corresponds to a first access resource, the second bit corresponds to a second access resource, and the third bit corresponds to a third access resource. And when the bit value is 1, the access resource is identified to be available, and when the bit value is 0, the access resource is identified to be unavailable. For example, 111 identifies that BS first, second and third access resources are currently available through which the UE can access the base station; 110 identifies that current first and second access resources are available through which the UE may access the base station; 100 identifies that the BS is configured with only the first access resource available, and the UE can only access the base station via the first access resource, and so on. When the UE receives the identifier 110, it can know that the UE can access the base station through the first access resource and the second access resource.
In a second implementation manner, if the BS configures three layers of access resources, namely a first access resource, a second access resource, and a third access resource, the BS uses 3 bits to identify which access resources are available. For example, when the value is 000, the identifier is only available for the first access resource; when the value is 001, the identifier is only available for the second access resource; when the value is 010, the identifier is only available for the third access resource; when the value is 011, the first and second access resources are identified to be available, and so on. When the UE receives the identifier 001, it can know that the UE can access the base station through the second access resource.
In either case, binary numbers are used to identify which access resources are available.
In step 330, the base station needs to further notify the UE of the information indicating the available access resources through a downlink message or a downlink signal. Specifically, there are various implementations, for example, in one possible implementation, the downlink Signal is a Cell-Specific Reference Signal (CRS). It should be understood that the cell common reference signal is used as an example, and the name change of the cell common reference signal does not affect the implementation and possible infringement of the patent. If a new name is adopted in the future 5G, it is also within the scope of the present invention as long as the function of the signal corresponding to the new name is consistent with the function of the cell common reference signal in the prior art.
Generally, a terminal needs to complete a Reference Signal (RS) reading operation before random access. It should be appreciated that in LTE, the cell reference signal sequence
The generation method is as follows:
wherein n issIndicating the slot number in a radio frame, l being the OFDM symbol in the current slot, c (i) being a pseudo-random sequence cinitIs initialized by the following equation:
to inform the UE of the available access resources, one possible implementation is to add a content N · N at the initialization of the pseudo-random sequencerandom_resThat is, as shown in the following equation:
wherein N israndom_resIs a binary representation of the available access resources, n is some positive integer (e.g. n is 10), which may be defined by the standard. Therefore, the terminal can acquire the parameter value by detecting the reference signal sequence.
Those skilled in the art will appreciate that the formula, n, is originally generated from the CRS of LTEsA maximum value of 19, a maximum value of 7,
the maximum value is 503, and the initialization generation formula of the pseudorandom sequence can be actually expressed as a polynomial: c. Cinit＝D10+D+1
Where the first term has a maximum value of 7 · (19+1) +7+1 ═ 148, expressed as binary: 10010100, the second term 503, expressed as binary: 111110111, it can be seen that the entire initialized value has the format shown in Table 1:
TABLE 1
| 14 bit 0 | 8 bits | 9 bits | 1 bit |
To add a new field n.Nrandom_resThis can be embodied in the initialization, and there are two implementation methods, one is to define n as 218I.e. the initialization polynomial is: c. Cinit＝D18+D10+ D +1, then it initializes the field formats as:
TABLE 2
| 11 bit 0 | 3 bit access resource | 8 bits | 9 bit cell ID | 1 bit CP |
The initialization formula at this time is:
in table 2, "3-bit access resource" is used to identify the first access resource and the second access resource, and specifically, reference may be made to the above two ways of identifying access resources by binary, either of which may be. For example, when the first mode is adopted, 111 indicates that the first access resource is available, the second access resource is available, and the third access resource is available; 101 denotes that the first access resource is available, the second access resource is not available, and the third access resource is available. When the second approach is taken, 001 means that only the first access resource is available; 010 means that only the second access resource is available; 011 indicates that only the third access resource is available; 100 indicates that the first access resource and the second access resource are available, and so on, and will not be described again.
Or the above initialization polynomial is changed to: c. Cinit＝D13+D4+D3+1, where it is assumed that the bits identifying the first access resource and the second access resource are placed in the last field, 3 bits, as shown in table 3. It should be understood that this embodiment is given by way of example only and that any other similar method is considered the same as the present solution.
TABLE 3
| 11 bit 0 | 8 bits | 9 bit cell ID | 1 bit CP | 3 bit access resource |
In table 3, "3-bit access resource" is used to identify the first access resource and the second access resource, and similarly, reference may be specifically made to the above two ways of identifying access resources by binary, either way. For example, when the first mode is adopted, 111 indicates that the first access resource is available, the second access resource is available, and the third access resource is available; 101 denotes that the first access resource is available, the second access resource is not available, and the third access resource is available. When the second approach is taken, 001 means that only the first access resource is available; 010 means that only the second access resource is available; 011 indicates that only the third access resource is available; 100 indicates that the first access resource and the second access resource are available, and so on, and will not be described again.
It should be understood that the difference, whether table 2 or table 3, is merely that the bit identifying the access resource is different in position in the initialization.
It should also be understood that 3 bits are only for illustration, and in actual implementation, those skilled in the art can select suitable bits according to the number of available access resources. For example, when the configured access resource has 4 levels, it can be identified by using 4 bits; when the configured access resource has only level 2, it can be identified by using 2 bits.
In the above embodiment, the information indicating the available access resources is notified to one or more UEs through the CRS, which may save system signaling and improve resource utilization. In another implementation, the base station may inform the UE of information indicating available access resources through a synchronization signal. Specifically, the method comprises the following steps:
since the primary synchronization signal mainly represents the physical ID in the cell ID group, the secondary synchronization signal is mainly considered to carry the parameter, and the sequence generation method is as follows:
wherein c is0(n) and c1(n) are two scrambling sequences, generated from two different cyclically shifted m-sequences, depending on the primary synchronization signal:
wherein n is more than or equal to 0 and less than or equal to 30,
is the physical ID in the physical layer cell ID group. It is contemplated that the N · N of available access resources will be identified in the secondary synchronization signalrach_resPut into it, specifically, the scrambling code sequence is modified as follows:
wherein N is an integer, n.N of the available access resources can be identified through the modificationrach_resEmbedded in a scrambling code and sent to the UE side. Wherein N israch_resIs a binary representation of the available access resources. After receiving the above scrambling code, the UE side can decode the above scrambling code by the existing decoding technology in the prior art to obtain a binary number for identifying the available access resource information, and then access the base station by the available access resource.
In another embodiment, the base station may notify the one or more UEs of the information indicating the available access resources through Physical Downlink Control Channel (PDCCH) signaling. It should be understood that the physical downlink control channel is only used as an example in the present patent application, and the name change of the physical downlink control channel does not affect the implementation and possible infringement of the present patent. If a new name is adopted in the future 5G, it is also within the scope of the present invention as long as the function of the signal corresponding to the new name is consistent with the function of the physical downlink control channel in the prior art.
Since the system message block SIB can be transmitted through the PDCCH in LTE, and is indicated in a common search interval of the PDCCH. Then, when SIB is transmitted, the PDCCH signaling may implicitly carry information indicating available access resources, without requiring the UE to read system messages. Specifically, the scrambling code of the PDCCH is performed according to the following formula:
by modifying the initialization formula of the scrambling code sequence, the following results can be obtained:
Similar to the method for the CRS as well,
is 3 bits, so n can take the value of 212. Likewise, the initialization polynomial may be changed to:
Before initial access, the terminal can obtain information of available access resources by obtaining the PDCCH, so as to obtain random access resources and realize a random access process.
In addition, in another possible implementation manner, the MIB may also be used to indicate available access resources. Assuming 2 bits are used, 4 possibilities are identified, in which case 4 different resource levels can be defined. For example, the first access resource is a smaller resource, the second access resource is a second access resource configuration, which is more than the first access resource, the third access resource is more than the second access resource, the resource of each level may be configured independently, or may be configured incrementally, when configured incrementally, the second access resource represents the first access resource plus the second access resource, and the third access resource is the third access resource plus the second access resource (including the first access resource) on the basis of the second access resource, as shown in fig. 5.
It should be understood that the process of identifying the available access resource carried in the MIB is substantially similar to the SIB2 message, please refer to the description of how to identify the first access resource and the second access resource in the SIB in this embodiment of the present invention, and details are not described here again. When the MIB indicates access resources of a certain level, the currently used resource configuration is shown, and the terminal obtains the configuration of the current random access resources by reading the MIB. It should be understood that the main information block is used as an example, and the name of the main information block is not changed to affect the implementation and possible infringement of the patent. If a new name is adopted in the future 5G, the protection scope of the present invention should also fall within the protection scope as long as the function of the signal corresponding to the new name is consistent with the function of the master information block in the prior art.
Compared with the foregoing embodiment, this method needs to read MIB information, occupies MIB overhead, which is displayed resource overhead, but can also achieve the purpose of dynamically defining random access resources as a method of resource indication.
It should be understood that the embodiment of the present invention may also send the information indicating the available access resources to one or more users through other messages or customized new messages, but compared with the above-mentioned system messages, the present invention has the disadvantages of large signaling overhead and low utilization rate of system resources.
In the embodiment of the invention, the base station can flexibly configure the random access resource, and compared with the prior art, the utilization rate of the system resource can be improved.
Example two
An embodiment of the present invention further provides a data communication method 600, including:
Optionally, the method further comprises: and acquiring the time-frequency information of the at least one first access resource and/or the at least one second access resource according to the configuration information for indicating the at least one first access resource and/or the at least one second access resource.
Specifically, when the UE receives a downlink broadcast message SIB2 (shown below), the time-frequency information of the at least one first access resource and/or the at least one second access resource is acquired.
Wherein the prach-additional configinfo-L1 is used to identify the first access resource and the prach-additional configinfo-L2 is used to identify the second access resource, as will be understood by those skilled in the art.
Optionally, the downlink signal may be a CRS.
Optionally, the information indicating the first access resource and/or the second access resource is located at the end of the CRS message.
Optionally, the information indicating the first access resource and/or the second access resource is 2 bits or 3 bits.
Optionally, the downlink signal may be a synchronization signal.
Optionally, the downlink message may be PDCCH signaling.
Optionally, the downlink message may be MIB.
Those skilled in the art should understand that the method 600 is a UE side method relative to the method 300, and the descriptions of the CRS, the synchronization signal, the PDCCH signaling, and the MIB at the base station side are also applicable to the embodiment of the present invention, and are not described again.
It should be understood by those skilled in the art that after the UE knows the available access resources, the procedure of how to access the base station is the same as the procedure of UE random access in the prior art, and is not described herein again.
EXAMPLE III
As shown in fig. 7, an embodiment of the present invention further provides an apparatus 700, including:
a processing unit 710, configured to configure at least one first access resource and at least one second access resource, where the first access resource and the second access resource do not overlap; configuring at least a portion of the at least one first access resource and at least one second access resource as available access resources;
a sending unit 720, configured to broadcast configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message; transmitting information indicating available access resources to the one or more user equipments through a downlink message or a downlink signal;
a receiving unit 730, configured to receive the uplink signal from the one or more user equipments through the available access resource.
Optionally, the downlink signal is a CRS.
Optionally, the downlink signal is a synchronization signal.
Optionally, the downlink message is a physical downlink control channel PDCCH signaling.
Optionally, the downlink message is a master information block MIB.
Those of ordinary skill in the art will understand that the third embodiment is an embodiment of the apparatus corresponding to the first embodiment, and the description related to the first embodiment also applies to the third embodiment, which is not repeated herein.
Example four
As shown in fig. 8, an embodiment of the present invention further provides an apparatus 800, including:
a receiving unit 810, configured to receive a broadcast message from a base station BS, where the broadcast message carries configuration information used to indicate at least one first access resource and/or at least one second access resource; receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources;
a processing unit 820, configured to access the base station according to the information of the available access resources.
Optionally, the downlink signal is a CRS.
Optionally, the downlink signal is a synchronization signal.
Optionally, the downlink message is a physical downlink control channel PDCCH signaling.
Optionally, the downlink message is a master information block MIB.
Those skilled in the art will understand that the fourth embodiment is an embodiment of the apparatus corresponding to the second embodiment, and the description related to the second embodiment also applies to the fourth embodiment, which is not repeated herein.
It will be appreciated that the apparatus of figures 7 to 8 is shown in the form of a functional unit. As used herein, without limitation, the term "unit" may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
EXAMPLE five
Fig. 9 is a schematic block diagram of a network element according to another embodiment of the present invention. The network element 900 includes a processor 910, a memory 920, a transceiver 930, an antenna 940, a bus 950, and a user interface 960.
In particular, the processor 910 controls the operation of the network element 900, and may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device.
The various components of the network element 900 are coupled together by a bus 950, where the bus system 950 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 950. It should be noted that the above description of the network element structure can be applied to the embodiments of the present invention.
The Memory 920 may include a Read Only Memory (ROM) and a Random Access Memory (RAM), or other types of dynamic storage devices that can store information and instructions, and may also be a disk Memory. Memory 920 may be used to store instructions that implement the associated methods provided by embodiments of the present invention. It is to be appreciated that the at least one of caching and long term storage is performed by programming or loading executable instructions into the processor 910 of the network element 900.
In a particular embodiment, the memory is configured to store computer-executable program code, wherein the program code includes instructions that, when executed by the processor, cause the network element to:
configuring at least one first access resource and at least one second access resource, wherein the first access resource and the second access resource do not overlap;
broadcasting configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message;
configuring at least one part of the at least one first access resource and the at least one second access resource as available access resources, and sending information for indicating the available access resources to the one or more user equipment through downlink messages or downlink signals;
receiving uplink signals from the one or more user equipments over the available access resources.
The specific implementation manner of the operation performed by the processor included in the network element serving as the base station BS may refer to the corresponding steps performed by the BS in the first embodiment and the third embodiment, and the embodiments of the present invention are not described again.
EXAMPLE six
Fig. 10 is a schematic block diagram of a network element according to another embodiment of the present invention. The network element 1000 includes a processor 1010, a memory 1020, a transceiver 1030, an antenna 1040, a bus 1050, and a user interface 1060.
In particular, the processor 1010, which may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, controls the operation of the network element 1000.
The transceiver 1030 comprises a transmitter 1032 for transmitting signals and a receiver 1034 for receiving signals. The number of the antennas 1040 may be one or more. The network element 1000 may also include a user interface 1060 such as a keypad, microphone, speaker, and/or touch screen. The user interface 1060 may deliver content and control operations to the network element 1000.
The various components of the network element 1000 are coupled together by a bus 1050, where the bus system 1050 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. For clarity of illustration, however, the various buses are labeled in the figure as bus system 1050. It should be noted that the above description of the network element structure can be applied to the embodiments of the present invention.
receiving a broadcast message from a Base Station (BS), wherein the broadcast message carries configuration information used for indicating at least one first access resource and/or at least one second access resource;
receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources;
and accessing the base station according to the information of the available access resources.
The specific implementation manner of the operation executed by the processor included in the network element serving as the user equipment UE may refer to the corresponding steps executed by the UE in embodiment two or embodiment four, and the embodiments of the present invention are not described again.
Embodiments of the present invention also provide a computer storage medium for storing computer software instructions for a user equipment, which includes a program designed to perform the above aspects.
Embodiments of the present invention further provide a computer storage medium for storing computer software instructions for the network device, which includes a program designed to execute the above aspects.
The embodiment of the invention also provides a communication network system, which comprises User Equipment (UE) and network equipment, wherein the network equipment is connected with one or more UEs through a wireless network, the BS is used for configuring at least one first access resource and at least one second access resource, and the first access resource and the second access resource are not overlapped; broadcasting configuration information indicating the at least one first access resource and/or the at least one second access resource to one or more user equipments through a system message; configuring at least one part of the at least one first access resource and the at least one second access resource as available access resources, and sending information for indicating the available access resources to the one or more user equipment through downlink messages or downlink signals; the UE is used for receiving a broadcast message from a Base Station (BS), wherein the broadcast message carries configuration information used for indicating at least one first access resource and/or at least one second access resource; receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources; and accessing the base station according to the information of the available access resources. For the interaction process between the UE and the network device, please refer to embodiments one to four, which are not described herein again.
According to the technical scheme provided by the embodiment of the invention, the BS can flexibly configure the random access resources, and compared with the prior art, the utilization rate of the system resources is improved.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (23)
1. A method of data communication, comprising:
configuring at least one first access resource and at least one second access resource, wherein the first access resource and the second access resource do not overlap;
transmitting configuration information indicating the at least one first access resource and the at least one second access resource to one or more user equipments through a broadcast channel;
configuring at least one part of the at least one first access resource and the at least one second access resource as available access resources, and sending information for indicating the available access resources to the one or more user equipment through downlink messages or downlink signals; or
Sending configuration information indicating the at least one first access resource to one or more user equipment through a broadcast channel, configuring at least one part of the at least one first access resource as an available access resource, and sending information indicating the available access resource to the one or more user equipment through a downlink message or a downlink signal; or
Sending configuration information indicating the at least one second access resource to one or more user equipments through a broadcast channel, configuring at least one part of the at least one second access resource as an available access resource, and sending information indicating the available access resource to the one or more user equipments through a downlink message or a downlink signal;
receiving uplink signals from the one or more user equipments over the available access resources.
2. The method of claim 1, wherein the downlink signal is a cell common reference signal.
3. The method of claim 1, wherein the downlink signal is a synchronization signal.
4. The method of claim 1, wherein the downlink message is physical downlink control channel signaling.
5. The method of claim 1, wherein the downlink message is a master information block.
6. The method of claim 2, wherein the information for indicating the available access resources has a length of at least 2 bits.
7. A method of data communication, comprising:
receiving a broadcast message from a Base Station (BS), wherein the broadcast message carries configuration information used for indicating at least one first access resource and at least one second access resource;
receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources;
and accessing the base station according to the information of the available access resources.
8. The method of claim 7, further comprising:
and acquiring the time-frequency information of the at least one first access resource and/or the at least one second access resource according to the configuration information for indicating the at least one first access resource and/or the at least one second access resource.
9. The method of claim 7 or 8, wherein the downlink signal is a cell common reference signal.
10. The method according to claim 7 or 8, wherein the downlink signal is a synchronization signal.
11. The method according to claim 7 or 8, wherein the downlink message is physical downlink control channel signaling.
12. The method according to claim 7 or 8, wherein the downlink message is a master information block.
13. An apparatus, comprising:
a processing unit, configured to configure at least one first access resource and at least one second access resource, where the first access resource and the second access resource do not overlap; configuring at least a portion of the at least one first access resource and at least one second access resource as available access resources;
a sending unit, configured to send configuration information indicating the at least one first access resource and the at least one second access resource to one or more user equipments through a broadcast channel; transmitting information indicating available access resources to the one or more user equipments through a downlink message or a downlink signal; or
The processing unit is further configured to configure at least a portion of the at least one first access resource as an available access resource, and the sending unit is further configured to send configuration information indicating the at least one first access resource to one or more user equipments through a broadcast channel, and send information indicating the available access resource to the one or more user equipments through a downlink message or a downlink signal; or
The processing unit is further configured to configure at least a portion of the at least one second access resource as an available access resource, and the sending unit is further configured to send configuration information indicating the at least one second access resource to one or more user equipments through a broadcast channel, and send information indicating the available access resource to the one or more user equipments through a downlink message or a downlink signal;
a receiving unit, configured to receive uplink signals from the one or more user equipments through the available access resources.
14. The apparatus of claim 13, wherein the downlink signal is a cell common reference signal.
15. The apparatus of claim 13, wherein the downlink signal is a synchronization signal.
16. The apparatus of claim 13, wherein the downlink message is physical downlink control channel signaling.
17. The apparatus of claim 13, wherein the downlink message is a master information block.
18. An apparatus, comprising:
a receiving unit, configured to receive a broadcast message from a base station BS, where the broadcast message carries configuration information used to indicate at least one first access resource and at least one second access resource; receiving a downlink message or a downlink signal from the base station, wherein the downlink message or the downlink signal carries information for indicating available access resources;
and the processing unit is used for accessing the base station according to the information of the available access resources.
19. The apparatus of claim 18, wherein the processing unit is further configured to:
and acquiring the time-frequency information of the at least one first access resource and/or the at least one second access resource according to the configuration information for indicating the at least one first access resource and/or the at least one second access resource.
20. The apparatus of claim 18 or 19, wherein the downlink signal is a cell common reference signal.
21. The apparatus of claim 18 or 19, wherein the downlink signal is a synchronization signal.
22. The apparatus according to claim 18 or 19, wherein the downlink message is physical downlink control channel signaling.
23. The apparatus according to claim 18 or 19, wherein the downlink message is a master information block.
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| CN117156561A (en) * | 2018-10-10 | 2023-12-01 | 中兴通讯股份有限公司 | Transmission and reception of access information |
| MX2022013689A (en) * | 2020-04-29 | 2023-02-23 | Huawei Tech Co Ltd | Access method and device, and communication system. |
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| CN107770733A (en) | 2018-03-06 |
| WO2018036182A1 (en) | 2018-03-01 |
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