WO2008022603A1

WO2008022603A1 - Method and apparatus for realizing inter-frequency measurement

Info

Publication number: WO2008022603A1
Application number: PCT/CN2007/070525
Authority: WO
Inventors: Ju Li; Liyan Yin; Xudong Yang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-08-18
Filing date: 2007-08-20
Publication date: 2008-02-28
Also published as: CN101128000A

Abstract

A method and apparatus for realizing inter-frequency measurement are disclosed. The method includes, in LTE (Long Term Evolution) system, UE obtains time of implementing inter-frequency measurement; UE implements inter-frequency measurement in the time of implementing inter-frequency measurement. The method is implemented so that according to measurement requirement UE can implement inter-frequency measurement for adjacent cell, inter-frequency measurement requirement in LTE system is satisfied, and communication performance in LTE system is improved.

Description

Method and device for realizing inter-frequency measurement

[I] Technical field

[2] The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for implementing inter-frequency measurement in a wireless communication network.

[3] Background of the invention

[4] With the rapid development of communication technology, in order to promote the sustainable development of 3G (third generation) communication technology,

3GPP proposes and deploys LTE (Long Term Evolution) system work.

[5] In LTE systems, the main problems addressed are: obtaining higher user data rates, improving system capacity and coverage, and achieving a reasonably flexible 3G spectrum allocation scheme.

[6] The LTE system is a frequency division system, and different users are distinguished by a domain and a frequency domain resource, and all users share one channel.

[7] In the LTE system, due to the mobility of the UE (User Equipment), it may cause a change in the quality of its received signal due to changes in the active area in the network. When the quality of the signal received by the UE is deteriorated, so that the service may not be performed normally, the UE needs to perform the measurement operation, so as to re-select the access mode according to the measurement result, and ensure that the UE can normally perform the service.

[8] In addition to changes in the signal quality of the UE due to changes in its active area, the UE may need to make measurements to determine the way the UE accesses the network due to other factors such as channel quality changes.

[9] In the LTE system, the measurement process of the UE includes an inter-frequency measurement process, and the UE needs to adjust the receiver frequency after performing the inter-frequency measurement. At present, the corresponding inter-frequency measurement process has not been implemented in the LTE system, so that it is impossible to select an appropriate measurement mode for the UE in the LTE system.

[10] Summary of the invention

[II] An embodiment of the present invention provides a method and an apparatus for implementing inter-frequency measurement, so that an inter-frequency measurement can be performed on a neighboring cell according to a measurement requirement in an LTE system, so as to meet an inter-frequency measurement requirement in an LTE system. Improve the communication performance of the LTE system.

[12] An embodiment of the present invention provides a method for implementing inter-frequency measurement, including: [13] In the Long Term Evolution (LTE) system, the user equipment acquires the time interval for performing the inter-frequency measurement;

[14] The user equipment performs an inter-frequency measurement operation between the acquired inter-frequency measurements.

An embodiment of the present invention provides an apparatus for implementing inter-frequency measurement, which is installed in a user equipment of an LTE system, and includes:

[16] The inter-frequency measurement inter-time acquisition unit is used to acquire the inter-time measurement of the inter-frequency measurement;

[17] The inter-frequency measurement execution unit is used to perform the inter-frequency measurement operation during the inter-frequency measurement of the inter-frequency measurement acquisition unit.

As can be seen from the technical solutions provided by the foregoing embodiments of the present invention, the embodiments of the present invention provide an implementation scheme for implementing inter-frequency measurement in an LT E system, thereby solving the problem that the existing LTE system cannot be implemented. The problem of the inter-frequency measurement solves the problem that the prior art cannot select a suitable measurement mode for the UE.

[19] BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a specific implementation process of a method according to an embodiment of the present invention; FIG.

2 is a schematic diagram 1 of a domain resource scheduled for a UE according to an embodiment of the present invention;

FIG. 3 is a schematic diagram 2 of a domain resource scheduled for a UE according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic structural diagram of a specific implementation of an apparatus according to an embodiment of the present invention.

[24] Mode for carrying out the invention

[25] An embodiment of the present invention provides an implementation scheme suitable for an inter-frequency measurement by an LTE system UE. In this solution, the UE performs inter-frequency measurement in a certain measurement gap, and performs inter-frequency measurement. It is necessary to obtain the measured interstices between the gaps in the process.

[26] The method for obtaining the measured interstitial interval provided by the embodiment of the present invention includes the following:

[27] (1) Before performing the inter-frequency measurement, the network side allocates resources to the user terminal (referred to as the user) according to the predefined sequence or the predefined formula. After that, when the inter-frequency measurement is performed, the user according to the network The resources allocated by the side, for example, the predefined sequence or the predefined formula can be known to perform the inter-frequency measurement;

[28] (2) After performing the inter-frequency measurement, the network side sends the measurement gap (measurement gap) information to tell the UE to perform the inter-frequency measurement;

[29] For example, when inter-frequency measurement needs to be performed, the network side is given according to a predefined sequence or a predefined formula. The user allocates resources, and the measured measurement indication message tells the measured gap (measurement gap) information, and the measurement gap information may represent a certain predefined sequence or a formula, and the UE may learn to perform the execution according to the measured gap information. Frequency measurement

[30] (3) Determine the time during which the inter-frequency measurement is performed according to the resources allocated by the network side for the user;

[31] In this case, the sequence indicating the inter-frequency measurement is not fixed. For example, the domain resources allocated to each UE are not arranged according to a fixed sequence or a fixed formula. The time that can be used for the inter-frequency measurement is related to a specific resource scheduling algorithm. For example, it is determined that the UE performs the inter-frequency measurement according to the idle time in the area resource allocated by the UE for the UE.

[32] From the various implementations described above (1) to (3) to determine the implementation of the inter-frequency measurement, it can be seen that the network side scheduling resources may or may not consider the measurement of the gap. For different situations, the UE will use different processing methods to implement the inter-frequency measurement operation. Among them, for the above (1) and

(2) In the two processing implementations, the time allocated to each UE for inter-frequency measurement may be the same or different, and the frequency allocated to a certain UE in each radio frame is different. The starting time of the measurement or the starting time for the transmission of the service data may be the same or different. Therefore, the UE only needs to start according to the allocated initial time for the inter-frequency measurement or for the service. The start of the data transmission is determined by the time between the execution of the inter-frequency measurement.

In the embodiment of the present invention, the inter-frequency measurement process of the user equipment may be triggered by the network side, for example, the network side performs a triggering operation by using the sent measurement indication message, where the measurement indication message includes: The user equipment performs a system message of the inter-frequency measurement or a dedicated measurement control message, and the like, where the system message may be a message sent by the network side when the UE is in an idle state or a connection state, and the measurement control message is sent. It is a control message sent by the UE on the network side to trigger the measurement operation.

In the embodiment of the present invention, the inter-frequency measurement processing process may also be triggered by the user equipment itself. For example, the user in an idle state may start the inter-frequency measurement operation according to his/her own needs.

[35] In order to facilitate the understanding of the embodiments of the present invention, several specific implementations of the embodiments of the present invention will be described with reference to the accompanying drawings.

[36] Example 1

[37] In this embodiment, the resource scheduling process is performed for the UE before performing the inter-frequency measurement, for example, the UE is allocated correspondingly. In the resource allocation process, the UE performs the inter-frequency measurement in the resource allocation process, and then, after the UE needs to perform the inter-frequency measurement, the UE determines, according to the allocated domain resource, the inter-frequency measurement performed by the UE. And carry out the corresponding inter-frequency measurement operation.

[38] The specific implementation process of this embodiment is as shown in FIG. 1, and specifically includes the following steps:

[39] Step 11: The network side schedules downlink resources for the UE, for example, allocates the domain resources to the UE according to a predefined sequence or according to a predefined formula;

[40] wherein the predefined sequence or the predefined formula is considered in the resource scheduling process.

E performs the inter-time information of the inter-frequency measurement, and therefore, by the sequence or formula, the UE can know the time available for the inter-frequency measurement in a certain measurement period;

[41] The predefined formula is mainly determined according to the size of the TTI (transmission time interval) or/and the identification data, and the formula needs to indicate or the network side indicates at what time the UE can start. The inter-frequency measurement or/and the transmission of the service data is started, so that the user equipment determines the start time of the specific start of the inter-frequency measurement;

[42] The predefined sequence is mainly determined according to the minimum gap (gap) requirement and/or the service type or/and the traffic volume, and the network side determines the predefined sequence, and needs to explain what the UE is. The transmission of the service data is started or the inter-frequency measurement is started in the daytime, so that the user equipment determines the start time of the specific start of the inter-frequency measurement;

[43] In the LTE system, the representation manner of the predefined sequence may include: each frame or each subsequence (a subsequence may be composed of one or more radio frames) is set to be used for different frequency In the case of measurement, for example, in Fig. 2 and Fig. 3, 4 ms of a radio frame or a subsequence is used for transmission of service data, and other time slots can be used for performing inter-frequency measurement operations. The representation of 4ms can be represented by two representations as shown in FIG. 2 and FIG. 3, wherein FIG. 2 shows that the 4 ms inter-turn can be decomposed, and FIG. 3 shows that the 4 ms inter-turn can not be represented differently:

[44] Step 12: The network side sends a measurement indication message to start the inter-frequency measurement.

[45] The measurement indication message includes: a system message or a dedicated measurement control message, and the information carried in the message may include: the same-frequency neighboring cell, the information of the inter-frequency neighboring cell, the neighboring cell information, and the same layer. At least one of the neighboring cell and the neighboring cell information may further include other information;

[46] Step 13: The UE determines the time interval for performing the inter-frequency measurement according to a known sequence or formula; [47] Step 14: The UE performs inter-frequency measurement during the time when the inter-frequency measurement can be performed;

[48] Step 15: When the UE determines to end the inter-frequency measurement, it notifies the network side that the inter-frequency measurement process ends. This step is an optional step. For example, the UE may end the processing of the inter-frequency measurement in other manners.

[49] Example 2

[50] In this embodiment, after the inter-frequency measurement needs to be performed, the network side allocates corresponding domain resources to the UE, and in the resource allocation process, the UE performs inter-frequency measurement, and then the UE allocates according to the allocation. The domain resource determines that the UE performs inter-frequency measurement, and performs corresponding inter-frequency measurement operations.

[51] This embodiment includes the following steps in a specific implementation process:

[52] In the first step, the network side sends a measurement indication message, such as a system message or a dedicated measurement control message, to start the inter-frequency measurement process;

[53] The information carried in the measurement indication message may include: the same-frequency neighbor cell information, the information of the inter-frequency neighboring cell, the neighbor cell information, the peer-level neighbor cell information, the hetero-layer neighbor cell information, and the measurement gap information. At least one item may also include other information;

[54] The determining the gap information may be: assigning a resource to the user according to a sequence or according to a formula;

[55] In the second step, after receiving the measurement indication message, the UE determines, according to the measurement gap information therein, that the inter-frequency measurement is performed;

[56] In the third step, after the inter-frequency measurement is performed, the corresponding inter-frequency measurement is performed; [57] optionally, after the inter-frequency measurement is ended, the UE may also report to the network side. The information of the inter-frequency measurement process ends, so that the network side determines that the inter-frequency measurement process of the UE ends.

[58] Example 3

[59] In this embodiment, the network side does not consider the inter-frequency measurement in the local area resource allocated for the UE. Therefore, when the UE needs to perform inter-frequency measurement, the UE may be allocated according to the area allocated for the UE. The idle time in the resource determines the time during which the inter-frequency measurement is performed to perform the inter-frequency measurement.

[60] This embodiment includes the following steps in a specific implementation process:

[61] In the first step, the network side schedules downlink resources for the UE, including the domain and the frequency domain resources;

[62] For example, before the inter-frequency measurement is performed, the network side has allocated corresponding domain resources to the UE, but the inter-frequency measurement is not considered in the process of scheduling resources for the UE; [63] In the second step, when the network side sends a measurement indication message, such as a system message or a dedicated measurement control message, the inter-frequency measurement process is started;

[64] The information carried in the measurement indication message may include: at least one of a same-frequency neighboring cell, information of a different-frequency neighboring cell, neighboring cell information, a neighboring cell, and a neighboring cell information. Can include other information;

[65] information about the measurement gap is not included in the measurement indication message;

[66] In the third step, after receiving the measurement indication message, the UE demodulates the message, and determines, according to the indication message on the network side, that the inter-frequency measurement operation needs to be performed on the neighboring cell;

[67] Since the measurement indication message received by the UE may also be other measurement indication information except the inter-frequency measurement, the embodiment is executed only after the measurement indication message indicates that the inter-frequency measurement needs to be performed. Next steps in ;

[68] In the fourth step, the UE determines, according to the area resource allocated by the network side, the time that can be used for the inter-frequency measurement, for example, the area resource allocated to the user can be used for the inter-frequency measurement, which may be:

[69] (1) When the network side vacates, for example, the idle time meets the requirement of performing inter-frequency measurement, the UE performs inter-frequency measurement in the idle time;

[70] (2) The inter-turn part vacated on the network side satisfies the requirement of performing inter-frequency measurement, and part of it is not satisfied, then the UE only uses the gap that meets the inter-frequency measurement requirement to perform inter-frequency measurement, for those that do not meet the requirements. If the gap exists, it is discarded, for example, the inter-frequency measurement operation is not performed;

[71] (3) All the vacancies on the network side do not meet the inter-frequency measurement requirements, then the UE reports the situation to the network side, and the network side re-allocates resources to facilitate inter-frequency measurement based on the re-allocated resources. The determination between the turns, thereby performing the inter-frequency measurement operation;

[72] wherein the inter-frequency measurement requirement may be: a minimum gap

The requirements, such as the minimum value of the gap length for inter-frequency measurement, must be such that the UE can adjust the receiver to the inter-frequency and synchronize with the target cell.

[73] Embodiment 4

[74] In this embodiment, before the UE performs the inter-frequency measurement, the UE has been allocated resources, and the inter-frequency measurement is considered in the processing of the scheduling resource.

[75] The specific implementation process of this embodiment includes the following steps: [76] In the first step, the network side schedules downlink resources for the UE, and the resources on the domain are scheduled. The inter-frequency measurement needs to be considered. Specifically, it is necessary to ensure that the gap length in each frame after scheduling is at least greater than the execution difference. The minimum gap requirement for frequency measurement;

[77] In the second step, the network side sends a measurement indication message, such as a system message or a dedicated measurement control message, to control the UE to initiate a corresponding inter-frequency measurement operation;

[78] The information carried in the measurement indication message may include: at least one of an intra-frequency neighboring cell, an information of an inter-frequency neighboring cell, neighboring cell information, a peer-layer neighboring cell, and a hetero-layer neighboring cell information, Can also include other information;

[79] In the third step, after receiving the measurement indication message, the UE demodulates the message, and after determining, according to the indication message on the network side, that the inter-cell measurement operation needs to be performed on the neighboring cell, performing the fourth step;

[80] In the fourth step, the UE may determine, according to the known allocated resources, the inter-frequency measurement, for example, the UE performs inter-frequency measurement in the gap that can perform the inter-frequency measurement, where the gap is The gap is determined according to each of the downlink resources allocated to the UE by the network side.

[81] Embodiment 5

[82] The specific implementation process of this embodiment includes the following steps:

[83] In the first step, the network side sends a measurement indication message, such as a system message or a dedicated measurement control message, to start the inter-frequency measurement operation of the UE;

[84] The information carried in the measurement indication message may include: information about a co-frequency neighboring cell and an inter-frequency neighboring cell.

And at least one of neighboring cell information, peer neighboring cell, heterogeneous neighbor cell information, and measurement gap information, and may further include other information;

[85] The determining principle of the measured gap information may include: the network side scheduling by using a known inter-day resource scheduled for the UE, and requiring the scheduling time of the scheduling to meet the minimum gap requirement for performing the inter-frequency measurement. Assuming that there are multiple inter-time resources available for gaps in a frame length range, and some gap resources meet the requirements, the network side can deliver the gap message that meets the requirements to the user, or the network side follows the scheduling algorithm. And measuring the gap request to re-schedule the resource to the user, scheduling the inter-day resource that meets the measurement gap requirement to the user, or the network side re-scheduling the resource according to a formula;

[86] In the second step, after receiving the measurement indication message, the UE demodulates the message. When it is determined according to the indication message on the network side that the inter-cell measurement needs to be performed on the neighboring cell, the third step is performed. [87] In the third step, the UE performs inter-frequency measurement according to the indicated measurement gap.

[88] The embodiment of the present invention further provides an apparatus for implementing inter-frequency measurement, and the specific implementation structure thereof is as shown in FIG.

The device is installed in a user equipment of the LTE system, and specifically includes:

[89] (1) Inter-frequency measurement unit

[90] This unit is used to obtain the time between the execution of the inter-frequency measurement;

[91] The inter-frequency measurement inter-time determining unit may be specifically triggered by the measurement indication message receiving unit, where the measurement indication message receiving unit is configured to receive a measurement indication message sent by the network side, and according to the measurement The indication message determines that the inter-frequency measurement needs to be performed, and triggers the inter-frequency measurement inter-turn determination unit; [92] the inter-frequency measurement inter-time determination unit may specifically adopt the method according to the manner of determining the inter-frequency measurement inter-turn Different implementation scenarios, here are two examples of specific applications:

[93] Example 1: The specific processing of the inter-frequency measurement inter-day determination unit includes:

[94] for acquiring the inter-frequency resource measurement performed by the network side according to the predefined sequence or the predefined formula for the user equipment;

[95] wherein, the predefined sequence is: determined according to a TTI value and/or a manner of identifying data;

[96] wherein the predefined formula is: determined according to at least one of a minimum gap value, a service type, and a traffic volume (which may also include other information).

[97] Example 2: The specific processing of the inter-frequency measurement inter-day determination unit includes:

[98] configured to determine idle time information that can meet the inter-frequency measurement requirement in the domain resource allocated for the user equipment, and use the idle time information satisfying the inter-frequency measurement requirement as the time interval for performing the inter-frequency measurement;

[99] In this example, the device further includes:

[100] The judging unit is configured to determine whether the idle time of the domain resource allocated by the network side for the user equipment can meet the inter-frequency measurement requirement, and if all or part of the idle time can meet the inter-frequency measurement requirement, the difference may be satisfied. The idle time required for the frequency measurement may be performed as the time interval for performing the inter-frequency measurement; otherwise, the resource allocation initiation unit needs to be triggered;

[101] The resource allocation initiating unit is configured to: after the triggering by the determining unit, the user equipment initiates a resource allocation processing process to the network side, and the network side re-allocates the domain resource, and the user terminal obtains a new resource allocation result.吋, triggering the judging unit again, until the corresponding inter-frequency measurement period is determined, or, according to other predefined conditions, such as processing the inter-turnover, etc., the corresponding inter-frequency measurement is determined accordingly. The process ends.

[102] (2) Inter-frequency measurement execution unit

[103] The unit is configured to perform an inter-frequency measurement operation during the inter-frequency measurement performed by the inter-frequency measurement inter-time acquisition unit, specifically, when the corresponding inter-frequency measurement arrives, the user terminal sets the frequency of the receiver. It is adjusted to the frequency of the inter-frequency to be measured, and synchronized with the corresponding target cell, after which the measurement processing of the inter-frequency signal can be performed.

The numbering and the order of the above-described embodiments are merely for the purpose of illustration, and are not intended to limit the order of the embodiments.

Moreover, the technical solution disclosed in the embodiments of the present invention can be applied to the inter-frequency measurement of the same system, and can also be applied to the inter-frequency measurement in the different system.

[106] In summary, the implementation of the embodiment of the present invention enables an inter-frequency measurement to be performed on a neighboring cell according to a measurement requirement in an LTE system, so as to meet the inter-frequency measurement requirement in the LTE system, improve communication performance of the LTE system, and solve There is a problem in the prior art that the appropriate measurement method cannot be selected for the UE. For example, the application of the embodiment of the present invention enables the UE to reselect a new channel as a channel for the UE to access the network through the corresponding inter-frequency measurement process, so that the UE can be in the new channel. Conduct business normally.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Changes or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[1] 1. A method for realizing inter-frequency measurement, characterized in that it comprises:

In the Long Term Evolution (LTE) system, the user equipment acquires the time interval for performing the inter-frequency measurement; the user equipment performs the inter-frequency measurement operation during the acquired inter-frequency measurement.

[2] The method according to claim 1, wherein before the acquiring the inter-frequency measurement, the method further comprises: receiving a measurement indication message sent by the network side, and according to the measurement indication The message performs an inter-frequency measurement.

[3] The method according to claim 2, wherein the information carried in the measurement indication message comprises: the same-frequency neighbor cell information, the information of the inter-frequency neighboring cell, the neighbor cell information, the peer-to-peer neighbor At least one of cell information, heterogeneous neighbor cell information, and measurement gap gap information.

[4] 4. The method according to claim 1, 2 or 3, wherein the processing of acquiring the inter-time measurement of the inter-frequency measurement comprises:

The user equipment obtains the time interval for performing the inter-frequency measurement according to the measurement gap information indicated by the received network side, where the measurement gap information is predefined sequence information or parameter information in a predefined formula, the pre-predetermined The defined sequence or the predefined formula is the basis for the network side to allocate the domain resources to the user equipment.

[5] 5. The method according to claim 4, wherein the predefined formula is: determined according to a manner of transmitting a time interval TTI value and/or identifying data.

[6] 6. The method according to claim 4, wherein the predefined sequence is: determined according to at least one of a minimum gap value, a service type, and a traffic volume.

[7] The method according to claim 4, wherein the method further comprises: the network side notifying the user equipment to start the inter-time measurement of the inter-frequency measurement and starting the transmission of the service data. At least one of the beginnings.

[8] 8. The method according to claim 1, 2 or 3, wherein the acquiring the processing of the inter-frequency measurement is performed according to the idle time of the regional resource allocated for the user equipment. Determine the day when the inter-frequency measurement is performed.

[9] 9. The method according to claim 8, wherein the performing the inter-frequency measurement operation comprises: If the idle time of the domain resource allocated by the network device for the user equipment can meet the inter-frequency measurement requirement, the user equipment performs the inter-frequency measurement in the idle time that meets the inter-frequency measurement requirement; and/or

If the idle time of the domain resource allocated by the network device for the user equipment does not meet the need for the inter-frequency measurement, the user equipment reports the network side, and the network side re-allocates the domain resource, and the user equipment regains satisfaction. Inter-frequency measurement in the idle time of the frequency measurement requirement; and / or '

If only the part of the idle time of the domain resource allocated by the network device for the user equipment satisfies the inter-frequency measurement requirement, the user equipment performs the inter-frequency measurement only by using the idle time that satisfies the inter-frequency measurement requirement.

[10] 10. The method according to claim 9, wherein the inter-frequency measurement requirement refers to a minimum value of a gap length required to perform an inter-frequency measurement, and within the inter-turn value determined by the minimum value. The user equipment can adjust the receiver frequency to the inter-frequency frequency to synchronize with the target cell.

[11] 11. A device for implementing inter-frequency measurement, wherein the device is installed in a user equipment of an LTE system, and includes:

An inter-frequency acquisition unit for acquiring inter-frequency measurements;

The inter-frequency measurement execution unit is configured to perform an inter-frequency measurement operation during the inter-frequency acquisition of the inter-frequency measurement acquisition unit.

[12] 12. The device according to claim 11, wherein the inter-frequency measurement inter-time acquisition unit is triggered by a measurement indication message receiving unit or triggered by a user equipment itself, wherein the measurement indication is The message receiving unit is configured to receive the measurement indication message sent by the network side, and trigger the inter-frequency measurement time acquisition unit after determining that the inter-frequency measurement needs to be performed according to the measurement indication message.

[13] 13. The device according to claim 11 or 12, wherein the device further comprises:

a determining unit, configured to determine whether an idle time of the domain resource allocated by the network side for the user equipment can meet the inter-frequency measurement requirement, and if yes, notify the inter-frequency measurement time acquisition unit; and the resource allocation initiation unit is configured to: According to the judgment result of the determining unit, after the inter-frequency measurement requirement is not met, the user equipment initiates a resource allocation process to the network side, and the network side re-allocates the domain resource, and the user terminal obtains a new resource allocation. The result 吋, trigger again Describe the judgment unit.